Technical field
[0001]
The embodiments of the present invention relate to the field of communication technology, and in particular to a method and device for side link resource multiplexing and indication.
Background technique
[0002]
V2X (Vehicle to Everything) is a vehicle communication technology that can realize information interaction between vehicles and vehicles, vehicles and roadside equipment, and vehicles and pedestrians. The sending device in V2X can communicate directly with the receiving device through a sidelink. Different from the Uu link of the cellular network (the air interface between the network device and the user equipment), the side link is the newly defined air interface for V2X (the air interface between V2X devices), and the side link can use the cellular network The frequency resources of the Uu link can also use dedicated frequency resources.
[0003]
The side link transmits control information through the Physical Sidelink Control Channel (PSCCH), and transmits data information through the Physical Sidelink Shared Channel (PSSCH). Long Term Evolution (LTE, Long Term Evolution) V2X only supports broadcast services. For example, the sending device broadcasts road safety information to surrounding receiving devices. The broadcast service does not need to introduce feedback. Therefore, LTE V2X does not provide a hybrid automatic repeat request (HARQ, Hybrid Automatic Repeat reQuest) feedback and/or Channel State Information (CSI, Channel State Information) feedback support.
[0004]
New Radio (NR, New Radio) V2X is currently one of the research projects standardized by Rel-16. Compared with LTE V2X, NR V2X needs to support many new scenarios and new services (such as remote driving, autonomous driving, and fleet driving). Need to meet higher technical indicators (high reliability, low latency, high data rate, etc.). In order to meet the needs of different scenarios and different services, in addition to broadcasting, NR V2X also needs to provide support for unicast and multicast.
[0005]
Different from broadcast, HARQ feedback and/or CSI feedback are of great significance to unicast and multicast. The sending device can decide whether to schedule retransmission based on the HARQ feedback result, so as to avoid the waste of resources caused by blind retransmission. The sending device can also be based on CSI measurement and feedback results for link adaptation, such as selecting the modulation and coding scheme (MCS, Modulation and Coding Scheme), precoding matrix indicator (PMI, Precoding Matrix Indicator), beam, and rank that are most suitable for the current channel (rank) and so on, which is conducive to achieving high data rate transmission.
[0006]
It should be noted that the above introduction to the technical background is only for the convenience of a clear and complete description of the technical solutions of the present invention and to facilitate the understanding of those skilled in the art. It should not be considered that the above technical solutions are well-known to those skilled in the art just because these solutions are described in the background art part of the present invention.
[0007]
Summary of the invention
[0008]
The inventor found that: NR V2X currently defines a new physical channel, called Physical Sidelink Feedback Channel (PSFCH, Physical Sidelink Feedback Channel), which is used to carry HARQ feedback information and/or CSI (hereinafter collectively referred to as feedback information) . The PSFCH may not occupy the entire time slot (slot) in the time domain, and the number of symbols occupied by the PSFCH (that is, the length of the PSFCH) may also vary with the overhead of the feedback information.
[0009]
Therefore, the PSFCH will bring about interference or rapid changes in signal strength in units of less than the time length of the time slot, which will affect the PSCCH and PSSCH multiplexed with the PSFCH; these effects include: reducing automatic gain control (AGC, Automatic Gain) Control) estimation accuracy or increase the complexity of AGC estimation; the symbol of the demodulation reference signal (DM-RS, De-Modulation Reference Signal) collides with the AGC symbol, which leads to a decrease in channel estimation performance; the transmission power is at one time Rapid changes occur in the gap, thereby increasing the complexity of power control and adjustment. The multiplexing of PSFCH, PSCCH and PSSCH in NR V2X needs to solve the above problems.
[0010]
In view of at least one of the above-mentioned problems, embodiments of the present invention provide a method and device for side link resource multiplexing and indication.
[0011]
According to a first aspect of the embodiments of the present invention, there is provided a side link resource multiplexing method, including:
[0012]
The second device receives length information indicating the length of the first part of a time slot sent by the terminal device or the network device; and
[0013]
The second device sends and/or receives side link information with the first device according to the length information.
[0014]
According to a second aspect of the embodiments of the present invention, there is provided a side link resource multiplexing device, including:
[0015]
A receiving unit, which receives length information indicating the length of the first part of a time slot sent by a terminal device or a network device; and
[0016]
A processing unit for sending and/or receiving side link information with the first device according to the length information.
[0017]
According to a third aspect of the embodiments of the present invention, a method for indicating side link resources is provided, including:
[0018]
The terminal device or the network device sends length information indicating the length of the first part of a time slot to the second device;
[0019]
Wherein, the length information is used by the second device to send and/or receive side link information with the first device.
[0020]
According to a fourth aspect of the embodiments of the present invention, a device for indicating side link resources is provided, including:
[0021]
A sending unit, which sends length information used to indicate the length of the first part of a time slot to the second device;
[0022]
Wherein, the length information is used by the second device to send and/or receive side link information with the first device.
[0023]
According to a fifth aspect of the embodiments of the present invention, a communication system is provided, including:
[0024]
The first device performs side link communication with the second device; and
[0025]
The second device receives length information indicating the length of the first part of a time slot sent by a terminal device or a network device; and sends and/or receives side link information with the first device according to the length information.
[0026]
One of the beneficial effects of the embodiments of the present invention is that: the second device receives length information indicating the length of the first part of a time slot sent by a terminal device or a network device; and the second device communicates with the first device according to the length information. Side link communication. In this way, the second device can process the first part according to the length information, so that the performance of side link transmission can be improved (for example, the accuracy of AGC estimation can be improved).
[0027]
With reference to the following description and drawings, specific embodiments of the present invention are disclosed in detail, indicating the ways in which the principles of the present invention can be adopted. It should be understood that the scope of the embodiments of the present invention is not limited thereby. Within the spirit and scope of the terms of the appended claims, the embodiments of the present invention include many changes, modifications and equivalents.
[0028]
Features described and/or shown for one embodiment can be used in one or more other embodiments in the same or similar manner, combined with features in other embodiments, or substituted for features in other embodiments .
[0029]
It should be emphasized that the term "comprising/comprising" when used herein refers to the existence of a feature, a whole, a step or a component, but does not exclude the existence or addition of one or more other features, a whole, a step or a component.
Description of the drawings
[0030]
The elements and features described in one drawing or one implementation of the embodiment of the present invention may be combined with the elements and features shown in one or more other drawings or implementations. In addition, in the drawings, similar reference numerals indicate corresponding parts in several drawings, and may be used to indicate corresponding parts used in more than one embodiment.
[0031]
Fig. 1 is a schematic diagram of a communication system according to an embodiment of the present invention;
[0032]
Figure 2 is a schematic diagram of a side link resource multiplexing method according to an embodiment of the present invention;
[0033]
FIG. 3 is a schematic diagram of side link resources according to an embodiment of the present invention;
[0034]
FIG. 4 is another schematic diagram of side link resources according to an embodiment of the present invention;
[0035]
FIG. 5 is another schematic diagram of side link resources according to an embodiment of the present invention;
[0036]
FIG. 6 is another schematic diagram of side link resources according to an embodiment of the present invention;
[0037]
FIG. 7 is another schematic diagram of side link resources according to an embodiment of the present invention;
[0038]
FIG. 8 is another schematic diagram of side link resources according to an embodiment of the present invention;
[0039]
FIG. 9 is a schematic diagram of multiple devices performing side link resource multiplexing according to an embodiment of the present invention;
[0040]
10 is another schematic diagram of multiple devices performing side link resource multiplexing according to an embodiment of the present invention;
[0041]
FIG. 11 is another schematic diagram of multiple devices performing side link resource multiplexing according to an embodiment of the present invention;
[0042]
FIG. 12 is another schematic diagram of multiple devices performing side link resource multiplexing according to an embodiment of the present invention;
[0043]
FIG. 13 is another schematic diagram of multiple devices performing side link resource multiplexing according to an embodiment of the present invention;
[0044]
FIG. 14 is another schematic diagram of side link resources according to an embodiment of the present invention;
[0045]
15 is another schematic diagram of multiple devices performing side link resource multiplexing according to an embodiment of the present invention;
[0046]
FIG. 16 is a schematic diagram of resource pool configuration according to an embodiment of the present invention;
[0047]
FIG. 17 is another schematic diagram of resource pool configuration according to an embodiment of the present invention;
[0048]
FIG. 18 is another schematic diagram of resource pool configuration according to an embodiment of the present invention;
[0049]
19 is another schematic diagram of multiple devices performing side link resource multiplexing according to an embodiment of the present invention;
[0050]
20 is another schematic diagram of multiple devices performing side link resource multiplexing according to an embodiment of the present invention;
[0051]
FIG. 21 is another schematic diagram of side link resources according to an embodiment of the present invention;
[0052]
FIG. 22 is another schematic diagram of side link resources according to an embodiment of the present invention;
[0053]
FIG. 23 is another schematic diagram of side link resources according to an embodiment of the present invention;
[0054]
FIG. 24 is another schematic diagram of side link resources according to an embodiment of the present invention;
[0055]
FIG. 25 is another schematic diagram of resource pool configuration according to an embodiment of the present invention;
[0056]
FIG. 26 is another schematic diagram of side link resources according to an embodiment of the present invention;
[0057]
FIG. 27 is a schematic diagram of a side link resource multiplexing device according to an embodiment of the present invention;
[0058]
FIG. 28 is a schematic diagram of a side link resource indicating device according to an embodiment of the present invention;
[0059]
Figure 29 is a schematic diagram of a network device according to an embodiment of the present invention;
[0060]
Fig. 30 is a schematic diagram of a terminal device according to an embodiment of the present invention.
Detailed ways
[0061]
With reference to the drawings, the foregoing and other features of the present invention will become apparent through the following description. In the description and drawings, specific embodiments of the present invention are specifically disclosed, which indicate some embodiments in which the principles of the present invention can be adopted. It should be understood that the present invention is not limited to the described embodiments. On the contrary, the present invention is not limited to the described embodiments. The invention includes all modifications, variations and equivalents falling within the scope of the appended claims.
[0062]
In the embodiments of the present invention, the terms "first", "second", etc. are used to distinguish different elements from the terms, but they do not indicate the spatial arrangement or chronological order of these elements. These elements should not be used by these terms. Limited. The term "and/or" includes any and all combinations of one or more of the associated listed terms. The terms "comprising", "including", "having" and the like refer to the existence of the stated features, elements, elements or components, but do not exclude the presence or addition of one or more other features, elements, elements or components.
[0063]
In the embodiments of the present invention, the singular forms "a", "the", etc. include plural forms, which should be broadly understood as "a" or "a type" rather than being limited to the meaning of "a"; in addition, the term "so" "Said" should be understood to include both singular and plural forms, unless the context clearly indicates otherwise. In addition, the term "based on" should be understood as "based at least in part on...", and the term "based on" should be understood as "based at least in part on...", unless the context clearly dictates otherwise.
[0064]
In the embodiment of the present invention, the term "communication network" or "wireless communication network" may refer to a network that complies with any of the following communication standards, such as Long Term Evolution (LTE), and Enhanced Long Term Evolution (LTE-A, LTE- Advanced), Wideband Code Division Multiple Access (WCDMA, Wideband Code Division Multiple Access), High-Speed ​​Packet Access (HSPA, High-Speed ​​Packet Access), etc.
[0065]
In addition, the communication between devices in the communication system can be carried out according to any stage of communication protocol, for example, it can include but not limited to the following communication protocols: 1G (generation), 2G, 2.5G, 2.75G, 3G, 4G, 4.5G, and 5G , New Radio (NR, New Radio), etc., and/or other currently known or future communication protocols.
[0066]
In the embodiment of the present invention, the term “network device” refers to, for example, a device in a communication system that connects a terminal device to a communication network and provides services for the terminal device. Network equipment may include but is not limited to the following equipment: base station (BS, Base Station), access point (AP, Access Point), transmission and reception point (TRP, Transmission Reception Point), broadcast transmitter, mobile management entity (MME, Mobile Management Entity), gateway, server, radio network controller (RNC, Radio Network Controller), base station controller (BSC, Base Station Controller), etc.
[0067]
Among them, the base station may include, but is not limited to: Node B (NodeB or NB), evolved Node B (eNodeB or eNB), 5G base station (gNB), etc., and may also include remote radio head (RRH, Remote Radio Head) , Remote Radio Unit (RRU, Remote Radio Unit), relay (relay) or low-power node (such as femeto, pico, etc.). And the term "base station" can include some or all of their functions, and each base station can provide communication coverage for a specific geographic area. The term "cell" may refer to a base station and/or its coverage area, depending on the context in which the term is used.
[0068]
In the embodiment of the present invention, the term "User Equipment" (UE, User Equipment) or "Terminal Equipment" (TE, Terminal Equipment or Terminal Device), for example, refers to a device that accesses a communication network through a network device and receives network services. The terminal device may be fixed or mobile, and may also be called a mobile station (MS, Mobile Station), terminal, subscriber station (SS, Subscriber Station), access terminal (AT, Access Terminal), station, etc.
[0069]
Among them, terminal devices may include but are not limited to the following devices: cellular phones (Cellular Phone), personal digital assistants (PDAs, Personal Digital Assistant), wireless modems, wireless communication devices, handheld devices, machine-type communication devices, laptop computers, Cordless phones, smart phones, smart watches, digital cameras, etc.
[0070]
For another example, in scenarios such as the Internet of Things (IoT, Internet of Things), the terminal device may also be a machine or device that performs monitoring or measurement. For example, it may include, but is not limited to: Machine Type Communication (MTC) terminals, Vehicle-mounted communication terminals, device to device (D2D, Device to Device) terminals, machine to machine (M2M, Machine to Machine) terminals, etc.
[0071]
In addition, the term "network side" or "network device side" refers to one side of the network, which may be a certain base station, and may also include one or more network devices as described above. The term "user side" or "terminal side" or "terminal device side" refers to a side of a user or a terminal, which may be a certain UE, or may include one or more terminal devices as above. Unless otherwise specified in this article, "equipment" can refer to network equipment or terminal equipment.
[0072]
The following describes the scenarios of the embodiments of the present invention through examples, but the present invention is not limited to this.
[0073]
FIG. 1 is a schematic diagram of a communication system according to an embodiment of the present invention, which schematically illustrates a case where a terminal device and a network device are taken as an example. As shown in FIG. 1, the communication system 100 may include a network device 101 and terminal devices 102 and 103. For simplicity, FIG. 1 only takes two terminal devices and one network device as an example for description, but the embodiment of the present invention is not limited to this.
[0074]
In the embodiment of the present invention, the network device 101 and the terminal devices 102 and 103 can perform existing service or service transmission that can be implemented in the future. For example, these services may include, but are not limited to: enhanced Mobile Broadband (eMBB), massive machine type communication (mMTC), and high-reliability and low-latency communication (URLLC, Ultra-Reliable and Low Latency). -Latency Communication), etc.
[0075]
It is worth noting that, FIG. 1 shows that two terminal devices 102 and 103 are both within the coverage of the network device 101, but the present invention is not limited to this. The two terminal devices 102 and 103 may not be within the coverage area of ​​the network device 101, or one terminal device 102 is within the coverage area of ​​the network device 101 and the other terminal device 103 is outside the coverage area of ​​the network device 101.
[0076]
In the embodiment of the present invention, side link transmission can be performed between the two terminal devices 102 and 103. For example, the two terminal devices 102 and 103 may both perform side link transmission within the coverage area of ​​the network device 101 to implement V2X communication, or both may perform side link transmission outside the coverage area of ​​the network device 101 to implement V2X communication. For communication, it is also possible that one terminal device 102 is within the coverage area of ​​the network device 101 and the other terminal device 103 is outside the coverage area of ​​the network device 101 to perform side link transmission to implement V2X communication.
[0077]
The embodiment of the present invention will take side links and V2X as examples for description, but the present invention is not limited to this.
[0078]
Example 1
[0079]
The embodiment of the present invention provides a side link resource multiplexing method, which is described from the second device side. The second device performs side-link communication with the first device; the first device and/or the second device may be terminal devices, but the present invention is not limited to this. For example, they may also be roadside devices or network devices. The first device and the second device are both terminal devices as an example for description.
[0080]
Fig. 2 is a schematic diagram of a side link resource multiplexing method according to an embodiment of the present invention. As shown in Fig. 2, the method includes:
[0081]
Step 201: The second device receives length information indicating the length of the first part of a time slot sent by a terminal device or a network device; and
[0082]
Step 202: The second device sends and/or receives side link information with the first device according to the length information.
[0083]
In an embodiment, the second device may perform automatic gain control on the first part according to the length information; but the present invention is not limited to this, for example, other processing may be performed according to the length information.
[0084]
It is worth noting that Figure 2 above only schematically illustrates the embodiment of the present invention, but the present invention is not limited to this. For example, the execution order between the various steps can be adjusted appropriately, and some other steps can be added or some steps can be reduced. Those skilled in the art can make appropriate modifications based on the foregoing content, and are not limited to the description of the foregoing FIG. 2.
[0085]
In an embodiment, the length information may include at least one of the following: the length of the physical side link feedback channel, the length of the time slot corresponding to the Numerology, and the length of the mini-slot; however, the present invention does not Limited to this.
[0086]
In an embodiment, the side link information may include information carried by at least one of the following channels: physical side link control channel (PSCCH), physical side link shared channel (PSSCH), physical side link feedback Channel (PSFCH).
[0087]
In one embodiment, the previous one or more symbols of the first part in the time slot carry information for AGC; and the previous one or more symbols of the first part in the time slot serve as a guard interval ( Guard). The time slot may also include at least one second part; and the first one or more symbols of the second part in the time slot carry information for AGC and/or serve as a guard interval. For example, the first part may be PSFCH, and the second part may be PSCCH and/or PSSCH.
[0088]
Fig. 3 is a schematic diagram of side link resources according to an embodiment of the present invention, showing an example in which PSCCH, PSSCH, and PSFCH are multiplexed in one time slot. This multiplexing mode is conducive to meeting low-latency service requirements. For example, UE 1 can receive PSCCH and PSSCH from UE 2 in this time slot, and send HARQ feedback information to UE 2 through PSFCH in the same time slot. Since the PSCCH and PSSCH are sent by UE 2 and the PSFCH is sent by UE 1, it is necessary to perform AGC estimation independently.
[0089]
For example, as shown in FIG. 3, AGC 1 symbol is used for AGC estimation of PSCCH and PSSCH, and AGC 2 symbol is used for AGC estimation of PSFCH. The GUARD 2 symbol is used as a guard interval for reception/transmission conversion between PSCCH/PSSCH and PSFCH, and the GUARD 1 symbol is used as a guard interval for reception/transmission conversion between time slots and time slots. AGC and GUARD in Figure 3 are located in different symbols. The time slot structure shown in FIG. 3 is not limited to a scenario that supports a certain device to receive data information and send HARQ feedback information in the same time slot.
[0090]
For example, in a certain time slot, UE 1 only needs to send feedback information to UE 2 through PSFCH, and UE 3 only needs to send data information to UE 4 through PSCCH/PSSCH, then UE 1 and UE 3 can perform PSFCH in the manner shown in Figure 3 Multiplexing with PSCCH/PSSCH.
[0091]
For another example, in a certain time slot, UE 5 needs to send data information to UE 6, and needs to send feedback information to UE 7, then the PSCCH/PSSCH and PSFCH sent to UE 6 and UE 7 can be multiplexed in the manner shown in Figure 3. Within one time slot. Therefore, the PSCCH, PSSCH, and PSFCH sent by different devices or sent to different devices can all be multiplexed in the same time slot, thereby improving spectrum utilization.
[0092]
As the processing capacity of the device increases, it is also possible to complete the receive/transmit conversion and AGC estimation within 1 symbol, that is, GUARD and AGC in Figure 3 can be located within 1 symbol.
[0093]
Fig. 4 is another schematic diagram of side link resources according to the embodiment of the present invention. An example in this case is given, where GUARD 1 and AGC 1 are located in the first symbol of the time slot, and within one symbol time It can not only complete the receive/transmit conversion between time slot and time slot, but also complete the AGC estimation of PSCCH and PSSCH. GUARD 2 and AGC 2 are located in the previous symbol of PSFCH, and PSCCH can be completed in one symbol time. /PSSCH and PSFCH receive/send conversion, and can complete the AGC estimation of PSFCH.
[0094]
For simplicity, Figure 3 and Figure 4 can be unified and abstracted.
[0095]
FIG. 5 is another schematic diagram of side link resources according to an embodiment of the present invention, and the AGC symbol and guard interval are omitted. In fact, the AGC and GUARD structures in FIG. 5 can use either of FIG. 3 or FIG. 4. In addition, Figure 5 does not have any restrictions on the relative positions of PSCCH/PSSCH and PSFCH in frequency, that is, PSCCH/PSSCH and PSFCH can be completely coincident in frequency, partially coincident or not coincident at all.
[0096]
Fig. 6 is another schematic diagram of side link resources according to an embodiment of the present invention, showing a situation where PSCCH/PSSCH and PSFCH completely overlap in frequency; Fig. 7 is another schematic diagram of side link resources according to an embodiment of the present invention, It shows a case where PSCCH/PSSCH and PSFCH partially overlap in frequency; FIG. 8 is another schematic diagram of side link resources in an embodiment of the present invention, showing a case where PSCCH/PSSCH and PSFCH do not overlap at all in frequency.
[0097]
In NR Rel-15, the feedback information of the Uu port is sent to a network device (such as a base station) through a physical uplink control channel (PUCCH, Physical Uplink Control Channel), and the number of symbols used by the PUCCH (that is, the length of the PUCCH) is variable. For example, the terminal device can flexibly select an appropriate PUCCH length according to the load condition of the feedback information.
[0098]
"Length" in this text generally refers to the length of time, for example, it can be measured by the number of symbols. The embodiment of the present invention may use Orthogonal Frequency Division Multiplex (OFDM), Single-Carrier Frequency Division Multiple Access (SC-FDMA, Single-Carrier Frequency Division Multiple Access), or Discrete Fourier Transform to extend the orthogonality, for example. Frequency division multiplexing (DFT-s-OFDM, Discrete Fourier Transform Spread Orthogonal Frequency Division Multiplex) and other waveforms, so the above symbols can be OFDM symbols, SC-FDMA symbols or DFT-s-OFDM symbols, etc., hereinafter referred to as symbols; but The present invention is not limited to this.
[0099]
If NR V2X follows the PUCCH idea, allowing the device to flexibly select the number of symbols used by the PSFCH (that is, the length of the PSFCH), the problem of inaccurate AGC estimation will occur. More specifically, the flexible PSFCH length means that different devices can use different PSFCH lengths. These PSFCHs of different lengths will cause the signal and/or interference strength of other devices that are receiving data to change within a time slot. The receiving device does not have the ability to grasp global information like the base station, and does not know the information of other devices that are multiplexed with itself. Therefore, the receiving device will not be able to accurately estimate the AGC, thereby reducing the reliability of information transmission.
[0100]
For NR Rel-15, a terminal device only needs to know its own PUCCH length information. For NR V2X, it is necessary for a terminal device to know the PSFCH length of other terminal devices. This is explained below by analyzing the influence of interference changes on AGC.
[0101]
FIG. 9 is a schematic diagram of multiple devices performing side link resource multiplexing according to an embodiment of the present invention. As shown in FIG. 9, for example, UE 1 sends PSCCH 1 and PSSCH 1 to UE 2, and UE 2 sends HARQ-ACK feedback information to UE 1 through PSFCH 2 in the same time slot. Since V2X devices can be multiplexed in a set of overlapping time-frequency resources (share the same set of time-frequency resources, or perform frequency reuse), UE 3 can send PSCCH 3 to UE 4 in the same time-frequency resources as UE 1 and UE 2 And PSSCH 3, for example, UE 3 thinks that the entire time slot can be used to send information through sensing. It is not necessary to exchange feedback information between UE 3 and UE 4, that is, there may be no PSFCH. As a receiving device, UE 4 is interfered by PSCCH 1/PSSCH 1 sent by UE 1 in part 1 of time slot k, and is interfered by PSFCH 2 sent by UE 2 in part 2 of time slot k. They are independent of each other, and the intensity of interference may vary greatly.
[0102]
For example, UE 1 to UE 4 are driving in the same direction in one lane. Because UE 2 is close to UE 4, part 2 of UE 4 is subject to strong interference. Because UE 1 and UE 4 are blocked by UE 2, Therefore, part 1 of the UE 4 suffers less interference. Although UE 3 will perceive before sending information, because it is far away from UE 4, it cannot accurately perceive the interference environment UE 4 is in, that is, the hidden node problem, or UE 3 can judge that the time slot is available through sensing at the beginning of the time slot , But because it cannot predict that there will be strong interference in part 2 of the time slot, UE 3 may still send information in this time slot.
[0103]
If the traditional method is used to estimate the AGC based on the first symbol in the slot, and the result is applied to the entire slot, in the above situation, the traditional method will cause the AGC estimation of part 2 to be inaccurate, which will lead to the data solution in the entire slot. Tune failed.
[0104]
To solve this problem, part 1 and part 2 of UE 4 need to perform AGC estimation independently. UE 4 itself may not need to send feedback information, that is, it does not need to know PSFCH resource configuration information such as PSFCH length, but in order to be able to perform independent AGC estimation on part 1 and part 2 in the time slot, UE 4 needs to know at least that it can PSFCH length information of other devices causing interference.
[0105]
FIG. 10 is another schematic diagram of multiple devices performing side link resource multiplexing according to an embodiment of the present invention. As shown in FIG. 10, UE 3 uses the entire time slot to send PSCCH 3 and PSSCH 3 to UE 4. Since different devices can be multiplexed in a set of overlapping time-frequency resources, other UEs can transmit and receive data within the same time-frequency resource range (RB m to RB n, time slot k).
[0106]
For example, UE 2 sends HARQ feedback and/or CSI feedback information through PSFCH 2 in RB m to RB n and part 2 of time slot k. UE 1 can sense or demodulate side link control information (SCI, Sidelink). Control Information) Knowing that there are PSFCH transmissions in RB m to RB n in the frequency domain and part 2 of time slot k in the time domain, so UE 1 can transmit PSCCH 1 and PSSCH 1 in part 1 of time slot k.
[0107]
For the reception of UE 4, it receives interference from different devices of UE 1 and UE 2 in part 1 and part 2 of time slot k, respectively. Therefore, part 1 and part 2 need to perform AGC estimation independently. Although the UE 4 itself may not need to send feedback information, in order to be able to perform independent AGC estimation on part 1 and part 2 in the time slot, the UE 4 needs to know at least the PSFCH length information of other devices that can cause interference to itself.
[0108]
FIG. 11 is another schematic diagram of multiple devices performing side link resource multiplexing according to an embodiment of the present invention. As shown in Figure 11, UE 1 uses the entire time slot to send PSCCH 1 and PSSCH 1 to UE 2, and multiplexed with them in a group of overlapping time-frequency resources is a group of V2X devices for groupcast communication, namely Within RB m to RB n, UE 3 sends information to a group of devices from UE 4 to UE N in a multicast manner.
[0109]
For multicast HARQ feedback, multiple devices using the same PSFCH resource to send HARQ feedback information is a way to efficiently use resources. It can avoid allocating dedicated PSFCH resources to each device, thereby greatly saving feedback resource overhead. It is possible to feed back only NACK and not ACK. When multiple devices use the same resource to send NACKs, the superimposed signals will produce a signal enhancement effect, which is conducive to the reliable reception of feedback information.
[0110]
However, while the above method enhances the feedback signal, it also enhances interference to other devices. For example, as shown in Figure 11, UE 4 to UE N receive multicast data in a certain time slot before time slot k, and send NACK in part 2 of time slot k. Due to the superposition of multiple UE signals, it may affect UE 2 time slot k. Part 2 of the UE 2 produces greater interference, so that the interference intensity of Part 1 and Part 2 of the UE 2 changes significantly. Therefore, Part 1 and Part 2 need to perform AGC estimation independently.
[0111]
Here, the UE 1 may not be able to learn the existence of multicast feedback by blindly detecting the SCI of the UE 3 or by sensing or other methods due to hidden nodes, etc. Therefore, it is inevitable to schedule the UE 2 to receive data on the same time-frequency resource. Although UE 2 may not need to send feedback information itself, in order to be able to perform independent AGC estimation on part 1 and part 2 in the time slot, UE 2 needs to know at least PSFCH length information of other devices that can cause interference to itself.
[0112]
It can be seen from the above that the receiving device at least needs to know the PSFCH length information of other devices. Since multiple devices may be multiplexed with a certain receiving device in a set of overlapping time-frequency resources, the receiving device learning the PSFCH information of multiple devices will bring about a large signaling overhead. In addition, flexible selection of the PSFCH length by multiple devices will also increase the AGC symbol overhead and/or AGC estimation complexity of the receiving device.
[0113]
FIG. 12 is another schematic diagram of multiple devices performing side link resource multiplexing according to an embodiment of the present invention. As shown in Figure 12, when multiple devices (UE 1, UE 2, etc.) have different PSFCH lengths, multiple partial lengths (such as part 2, part 2') will be formed at a certain receiving device (UE4), then UE 4 will experience different levels of interference in a time slot (the interferences in part 1', part 2 and the rest of the time slot in Figure 12 are different), and need to perform multiple independent AGC estimations, which requires greater AGC symbol overhead and/or higher AGC estimation complexity.
[0114]
Figures 9 to 12 are only given schematically as examples. For simplicity, Figures 9 to 12 assume that the number of resource blocks (RB, Resource Block) occupied by the PSCCH/PSSCH interfered by the PSFCH and the PSFCH as the interference source The number of RBs occupied is the same. In fact, the number of RBs of the two can also be different. As long as there are overlapping RBs in the frequency domain, the above interference analysis and the impact on AGC are still valid, and we will not list them all.
[0115]
For simplicity, Figure 9 to Figure 12 can be unified and abstracted.
[0116]
FIG. 13 is another schematic diagram of multiple devices performing side link resource multiplexing according to an embodiment of the present invention. As shown in FIG. 13, for the PSCCH 1 and PSSCH 1 that a device wants to receive in a certain time slot, there may be information transmission and reception between other devices in the time-frequency resources that overlap with them (not necessarily completely overlap). For example, PSCCH2/PSSCH 2, PSFCH 3, PSCCH 4/PSSCH 4, PSFCH 5, etc. The information carried by these physical channels can come from different devices. The interference of PSCCH 1/PSSCH 1 in a time slot will change, so only The traditional method of performing AGC estimation based on the first symbol in the slot is no longer applicable, and the receiving device of PSCCH 1/PSSCH 1 needs to perform AGC estimation multiple times in one slot.
[0117]
FIG. 14 is another schematic diagram of side link resources according to an embodiment of the present invention. For example, as shown in Figure 14, the PSSCH uses more RBs to transmit a larger size transport block (TB, Transport Block), but part 2 of the time slot is subject to strong narrow-band interference from the PSFCH. If it is only based on the first one in the time slot The symbol is estimated by AGC, the PSSCH demodulation and decoding performance of part 2 will be affected, which will affect the demodulation and decoding performance of the TB in the entire time slot.
[0118]
The change of the interference in the time slot is one reason for multiple AGC estimations, and the other reason can be the change of signal energy (or power).
[0119]
FIG. 15 is another schematic diagram of multiple devices performing side link resource multiplexing according to an embodiment of the present invention. As shown in Figure 15, the physical channels or signals of PSCCH 1/PSSCH 1 and other devices (such as PSCCH 2/PSSCH 2, PSFCH 3, PSCCH 4/PSSCH 4, PSFCH 5, etc.), the number of RBs occupied by these physical channels can be different ) Is multiplexed in the frequency domain in a frequency division multiplexing manner, and these physical channels all fall within the receiving frequency range of the PSCCH 1/PSSCH 1 receiving device (for example, within the BWP of the receiving device).
[0120]
The signal energy received by the receiving device in the time slot is the sum of all physical channels and/or signal energy of frequency division multiplexing. Since there are signals from different devices in the time slot, the energy of the time domain signal received by the PSCCH 1/PSSCH 1 receiving device will change within the time slot, so the traditional AGC estimation is based on the first symbol in the time slot. The method is no longer applicable, and the receiving device of PSCCH 1/PSSCH 1 needs to perform multiple AGC estimations in one time slot. The scenarios in Figs. 9 to 12 can be easily extended to the frequency division multiplexing scenario shown in Fig. 15 to illustrate the change of signal energy in the time slot, which will not be repeated one by one.
[0121]
Through the above analysis, even if the device only needs to receive PSCCH and PSSCH like LTE V2X, or even if the device itself does not need to use PSFCH to send information, because NR V2X introduces PSFCH, based on the impact of PSFCH on AGC analyzed before, the device still has It is necessary to perform multiple AGC estimations in one time slot. In order to perform multiple AGC estimations, the device needs to know the PSFCH length information of other devices. In order not to perform too many AGC estimations, other devices can be restricted to have the same PSFCH length. When this condition is met, the device can only perform AGC estimations at most twice in a time slot.
[0122]
In one embodiment, when there are at least two of the first part lengths within a time range that overlaps with the one time slot in time, the at least two first part lengths are configured to be the same.
[0123]
For example, for devices that use the same time-frequency resources (for example, partial bandwidth BWP, resource pool, carrier, etc.), if PSFCH needs to be sent, the PSFCH of these devices can be restricted to have the same PSFCH length. In this way, the receiving device can perform AGC estimation at a certain position according to the length of the PSFCH, and only perform AGC estimation twice at most in one time slot.
[0124]
In an embodiment, the length information may be configured by at least one of the following signaling or information: radio resource control (RRC, Radio Resource Control) signaling, system information (SI, System Information), and side link control information (SCI, Sidelink Control Information), Downlink Control Information (DCI, Downlink Control Information).
[0125]
For example, SCI can be used to inform the PSFCH length. The Cyclic Redundancy Check (CRC, Cyclic Redundancy Check) of the SCI can be scrambled using a public identifier. The SCI may indicate at least one of the following: the length of the PSFCH, the time slot where the PSFCH is located, the symbol where the PSFCH is located, the resource block where the PSFCH is located, the time slot where the PSSCH is located, the symbol where the PSSCH is located, and the resource block where the PSSCH is located.
[0126]
For example, UE 1 sends an SCI to UE 2, and the CRC of the SCI is scrambled with a public identifier (such as a public ID or a public RNTI), and the above public identifier may also be a group (group-common) ID or RNTI. The SCI indicates the time slot in which UE 2 sends HARQ feedback and/or CSI information, and a field of the SCI is used to indicate the length of the PSFCH. The specific implementation may use high-level signaling (such as RRC signaling) to configure several available PSFCH lengths. The SCI indicates which PSFCH length is actually used, so the UE 2 knows in which time slot and how many symbols are used to transmit the PSFCH.
[0127]
The PSFCH length is directly indicated in the SCI above, and the PSFCH length can also be indicated by indicating the PSFCH time-frequency resource. For example, the SCI indicates the time slot, symbol, and RB where the PSFCH is located, so that the UE 2 can also obtain PSFCH length information from this. In addition, since the CRC of the aforementioned SCI is scrambled with the public identifier, other devices except UE 2 can also demodulate the SCI to obtain the PSFCH length and the time slot information of the PSFCH, and perform additional operations based on the information in the time slot where the PSFCH appears. The AGC estimates.
[0128]
Consider the following scenario, where the PSFCH sent by UE 2 will be multiplexed with the PSSCH received by UE 3, thereby affecting the AGC of UE 3. However, since UE 3 can also demodulate the aforementioned SCI carrying PSFCH information, UE 3 can also obtain PSFCH Length information, so UE 3 can perform additional AGC estimation based on PSFCH length information.
[0129]
In addition, indicating the length of the PSFCH through the SCI also has sufficient flexibility to configure multiple PSFCHs sent in the same time slot to have the same length. For example, SCI 1 sent by UE 1 to UE 2 instructs UE 2 to send PSFCH 1 in time slot k, and SCI 2 sent by UE 3 to UE 4 instructs UE 4 to send PSFCH 2 in time slot k, then SCI 1 and SCI 2 can indicate With the same PSFCH length, for UE 5 that is multiplexed with PSFCH 1 and PSFCH 2 in time slot k, it can avoid performing too many AGC estimations when receiving the multiplexed PSSCH. In this example, UE 5 only needs to perform AGC estimation twice.
[0130]
For example, this method can be used in two-stage SCI (2-stage SCI). The two-step SCI divides the information carried by one SCI originally sent to UE 1 into two parts, which are carried by two SCIs. For example, SCI 1 can not only carry any of the above information used to indicate the length of the PSFCH, but also the time-frequency resource information where the PSSCH is located (such as the time slot, symbol, and RB where the PSSCH is located). The CRC of SCI 1 uses the public identifier to scramble ; SCI 2 carries MCS and other information used for demodulation and decoding, and the CRC of SCI 2 is scrambled with a device-specific (UE-specific) identifier (for example, C-RNTI).
[0131]
Due to the use of public identification scrambling, SCI 1 can be received by UE 2, so UE 2 can avoid the PSFCH and/or PSSCH resources indicated by SCI 1 to avoid interference; and UE 1 can receive two SCIs to achieve complete data Information reception and demodulation. Since the information such as the PSFCH length and the time slot where the PSFCH is located is carried in the SCI 1, when the UE 2 receives the SCI 1, it can also perform additional AGC estimation based on the PSFCH length information in the time slot where the PSFCH appears.
[0132]
For example, the above-mentioned length information may be carried in resource reservation signaling. SCI 1 is used as resource reservation signaling to indicate that a certain time-frequency resource will be reserved for PSCCH 2 and/or PSSCH 2 transmission. In addition, SCI 1 can also indicate PSFCH length information in any of the above forms, and CRC of SCI 1 The public identifier is used for scrambling, so the SCI 1 can be received by multiple UEs, so that these UEs can avoid transmitting on the resources reserved by the SCI 1, and more accurate AGC estimation can also be made based on the PSFCH length indicated by the SCI 1. Optionally, PSCCH2 can further carry SCI 2. SCI 2 is used to schedule PSSCH 2. SCI 2 can use the same format as regular SCI, indicating the time-frequency resource and MCS where PSSCH 2 is located, and the CRC of SCI 2 can be used exclusively for equipment The identifier is scrambled, so that the receiving UE of PSCCH2 and PSSCH 2 can achieve correct reception of control and data information.
[0133]
In an embodiment, the length information is configured or pre-configured or pre-defined to be related to one or a group of time-frequency resources; the time-frequency resources include one or more time slots in the time domain, and in the frequency domain Contains one or more resource blocks.
[0134]
In an embodiment, the time-frequency resource may be configured by at least one of the following: radio resource control (RRC) signaling, system information, side link control information, and downlink control information. The time-frequency resource may include at least one of the following: a receiving resource pool, a sending resource pool, a partial bandwidth (BWP), a carrier, and a component carrier.
[0135]
For example, a PSFCH length can be configured or pre-configured for each resource pool. Resource pools are configured on a device-by-device basis, and a device can be configured with multiple resource pools. Therefore, “configure or pre-configure for each resource pool” in the invention actually means “configure or pre-configure for each resource pool of each device”. A simple way of saying “configuration”. The resource pool is composed of several time slots in the time domain and several RBs in the frequency domain. The resource pool can be a sending resource pool or a receiving resource pool. For the sake of simplicity, all are referred to as resource pools in the following. NR V2X will configure one or more resource pools for data transmission and reception for the device, so the PSFCH length can be configured in the unit of the above resource pool. Or when configuring a certain PSFCH length, indicate which existing resource pool the PSFCH length is associated with.
[0136]
Configuring or pre-configuring a PSFCH length for a certain resource pool can have two meanings:
[0137]
Assuming that the device does not need to transmit and receive PSFCH in the first resource pool (for example, the first resource pool is only used for broadcast services, and the broadcast service does not require PSFCH), the PSFCH length of the first resource pool refers to the possible impact on the AGC of the first resource pool When the device receives the length of the PSFCH from other resource pools in the first resource pool, it can perform additional AGC estimation based on the PSFCH length of the first resource pool.
[0138]
Suppose that the device needs to perform PSFCH transmission and reception in the first resource pool (for example, the first resource pool is used for unicast services. In some time slots where PSFCH exists, PSSCH can be multiplexed with PSFCH in any of the aforementioned ways. For some time slots where PSFCH does not exist, the entire time slot can be used for PSFCH transmission and reception). At this time, the PSFCH length of the first resource pool refers to both the PSFCH length used by the device to perform PSFCH transmission and reception in the first resource pool, and also refers to the possible impact on the first resource pool. The length of PSFCH from other resource pools affected by the AGC of one resource pool. When receiving in the first resource pool, the device does not necessarily need to receive PSFCH in every time slot. The device needs to receive PSFCH according to the time slot in which it needs to receive PSFCH. The PSFCH length of the first resource pool realizes the reception of the PSFCH, and the device can perform additional AGC estimation according to the PSFCH length of the first resource pool in the time slot that does not need to receive the PSFCH but needs to receive the PSSCH.
[0139]
Configuring the PSFCH length for the resource pool also includes reconfiguring the PSFCH length as required. For example, when a longer PSFCH length is required for a certain resource pool, a new PSFCH length can be reconfigured for the resource pool through RRC signaling.
[0140]
The definition and configuration method of the resource pool can follow the LTE V2X resource pool definition and configuration method. For details, please refer to section 14.1.5 of TS 36.213, and replace "subframe" with "time slot". Here "configuration" can be used when the device is in coverage (in coverage), and the device can receive network configuration information, for example, through at least one of system information (MIB/SIB), RRC signaling, DCI signaling, and SCI signaling One type; "pre-configuration" can be used when the device is out of network coverage (out-of-coverage), and the device performs V2X communication according to the pre-configuration (that is, the default configuration or the factory configuration or the configuration specified by the standard). For the sake of simplicity, the term "configuration" is used in the following, including the above-mentioned "configuration" and "pre-configuration" two implementation methods.
[0141]
A certain resource pool may not be configured with the PSFCH length or the PSFCH length is configured to be zero, which means that the AGC estimation in the resource pool does not need to consider the influence of the PSFCH. Since a device can be configured with multiple resource pools, the time-frequency resources of some resource pools can be used for multiplexing with other devices. For example, the aforementioned devices are multiplexed in a set of overlapping time-frequency resources, or the devices can perform frequency Division multiplexing, for simplicity, can be collectively referred to as "multiplexing" in the following.
[0142]
For example, when a certain resource pool of UE 1 does not reuse other devices that need to use PSFCH, the AGC estimation of UE 1 does not need to consider the PSFCH impact, that is, the LTE V2X principle can be followed, and the AGC estimation is performed based only on the first symbol in the slot. ; Or even if a certain resource pool of UE 1 multiplexes other devices that need to use PSFCH, the base station or other devices can judge that the resource pool is affected by PSFCH and can be ignored, for example, the power of PSFCH is much smaller than the useful signal power of UE 1. At this time, the PSFCH length may not be configured or the PSFCH length may be configured to be zero. Otherwise, when a certain resource pool of UE 1 multiplexes other devices that need to use PSFCH, UE 1 needs to consider the influence of PSFCH on AGC. For example, the AGC can be estimated according to the configured PSFCH length of the resource pool.
[0143]
The configuration of the PSFCH length according to the resource pool provides configuration flexibility. For example, the resource pools of all other devices that are multiplexed with UE 1 can be configured to have the same PSFCH length, so that UE 1 can only perform at most in one time slot. Two AGC estimation; for example, different resource pools can have different PSFCH lengths, which can support and accommodate different feedback overhead; for example, multiple resource pools belonging to the same device can also be configured to have the same PSFCH length, thus The device can receive information from multiple resource pools, and also only perform AGC estimation at most twice in a time slot.
[0144]
FIG. 16 is a schematic diagram of resource pool configuration according to an embodiment of the present invention. For example, as shown in FIG. 16, resource pool i and resource pool j belong to UE 1, and coexist in the BWP of UE 1 in a time division multiplexing manner. In this BWP, if resource pool j is not multiplexed with PSFCH, or the interference or signal change caused by PSFCH is negligible, the PSFCH length of resource pool j can be configured to zero, or PSFCH can not be configured for resource pool j Length, that is, resource pool j may not need to consider the impact of PSFCH on AGC. In this BWP, resource pool i is multiplexed with PSFCH, or the first device needs to receive or send feedback information through PSFCH in resource pool i. Therefore, resource pool i can be configured with an appropriate PSFCH length, that is, resource pool i needs to be considered The impact of PSFCH on AGC.
[0145]
FIG. 17 is another schematic diagram of resource pool configuration according to an embodiment of the present invention, and gives an example of multiplexing resource pools of different devices in a BWP. For a certain resource pool 1 belonging to UE 2, if the resource pool forms frequency division multiplexing with resource pool i of UE 1 (or overlaps with resource pool i in time-frequency resources), the PSFCH of resource pool 1 can be The length is configured to be the same as the PSFCH length of the resource pool i. By aligning the PSFCH length, the number of AGC estimation times of the UE 1 in a time slot of the resource pool i can be reduced to a maximum of two. Similarly, the resource pool r of the UE 3 forms frequency division multiplexing with the resource pool i and the resource pool 1, so the PSFCH lengths of the resource pools r, i, and l are configured to be the same.
[0146]
The resource pool configuration of different devices shown in FIG. 17 may include at least the following situations.
[0147]
For example, one situation may be that resource pools i, j, r, and l are all resource pools configured for UE 1, UE 2, and UE 3, that is, three UEs share these four resource pools. In a certain time slot, suppose that only resource pool i has information sent to UE1, and only resource pool 1 has the PSFCH sent by UE 2. Since both are located in the BWP of UE 1, the AGC when UE 1 is receiving It is estimated to be affected by the PSFCH of UE 2.
[0148]
For example, one situation may be that only resource pools i and j are resource pools configured for UE 1, while resource pools l and r are resource pools configured for UE 2 and UE 3, respectively. This is because the number of resource pools for a UE It is configurable. For example, UE 1’s BWP can be configured with up to four resource pools including i, j, r, and l, but currently UE 1 is configured with only two resource pools, namely resource pools i and j, and Resource pools l and r that are not used by UE 1 are configured for use by UE 2, UE 3 and other devices. Although resource pools l and r are not configured for UE 1, because resource pools l and r are still located in the BWP of UE 1 In addition, the AGC estimation of UE 1 when receiving is still affected by the PSFCH from resource pools l and r.
[0149]
FIG. 18 is another schematic diagram of resource pool configuration according to an embodiment of the present invention. For example, as shown in FIG. 18, resource pool i and resource pool j belonging to UE 1 coexist in the BWP of UE 1 in a frequency division multiplexing manner. Assuming that both resource pools i and j require PSFCH length configuration, by configuring the same PSFCH length for resource pool i and resource pool j, the number of AGC estimation times of UE 1 in a time slot of resource pool i can be reduced to a maximum of two. For a certain resource pool 1, if the resource pool 1 forms frequency division multiplexing with resource pools i and j, or overlaps with resource pools i and j in time-frequency resources, the PSFCH length of resource pool 1 can be configured as Same as resource pool i and j.
[0150]
For the above PSFCH length configuration, the PSFCH length can be used as one of the parameters of the resource pool. For example, the time domain and frequency domain position of the resource pool can be configured when configuring the resource pool; the PSFCH length can also be configured independently of the resource pool. And by indicating which resource pool the PSFCH length acts on, the association and correspondence between the PSFCH length and the resource pool are established. For the above configuration, the specific implementation manner adopted may include at least one of system information (MIB/SIB), RRC signaling, DCI signaling, and SCI signaling, and pre-configuration. Each resource pool can be independently configured or associated with a PSFCH length, and each resource pool can have a PSFCH length.
[0151]
FIG. 19 is another schematic diagram of multiple devices performing side link resource multiplexing according to an embodiment of the present invention. Compared with FIG. 13, the PSFCH lengths of different resource pools of different devices with overlapping time-frequency resources are all the same. FIG. 20 is another schematic diagram of multiple devices performing side link resource multiplexing according to an embodiment of the present invention. Compared with FIG. 15, the PSFCH lengths of different resource pools of different devices of frequency division multiplexing are all the same.
[0152]
For example, the PSFCH length can be configured semi-statically for each resource pool using RRC signaling and/or system information, or the PSFCH length can be dynamically configured using SCI signaling and/or DCI signaling, where the dynamically configured PSFCH length can be overridden. Write (override) the semi-statically configured PSFCH length, that is, when the two are inconsistent, the dynamically configured PSFCH length shall prevail.
[0153]
For example, the first PSFCH length is configured for a certain resource pool through RRC signaling, but the SCI signaling indicates that a certain time slot has the second PSFCH length. At this time, the PSFCH length in the time slot is the second PSFCH length, that is, the SCI The instructions shall prevail. The semi-static configuration makes it easier to align the lengths of multiple PSFCHs in the time slot, and the dynamic configuration can adjust the PSFCH length more flexibly and accurately according to load or coverage requirements, and the combination of the two can support PSFCH multiplexing more efficiently.
[0154]
For another example, a PSFCH length can be configured or pre-configured for a group of time-frequency resources. The difference from the foregoing configuration of the PSFCH in the unit of a resource pool is that a set of time-frequency resources here are configured independently of the existing send/receive resource pool. For the specific configuration method of a group of time-frequency resources, the same configuration method as that of the resource pool can be used, for example, according to the method described in section 14.1.5 of TS 36.213, and "subframe" is replaced with "time slot". The scope of the PSFCH length is a set of time-frequency resources associated with it. Since a group of time-frequency resources are configured independently of the resource pool, this group of time-frequency resources may be different from or the same as the existing resource pool.
[0155]
For another example, each BWP can be configured or pre-configured with a PSFCH length, and each BWP has a PSFCH length. For another example, each carrier or component carrier (carrier or component carrier) can be configured or pre-configured with a PSFCH length, and each carrier has a PSFCH length.
[0156]
For another example, the length information is predefined. For example, the standard specifies the PSFCH length, and the PSFCH has a fixed length.
[0157]
For the aforementioned PSFCH length configuration with the granularity of BWP or carrier, it can be easily extended from the PSFCH length configuration of the resource pool. For example, the PSFCH length of the BWP or carrier may not be configured or configured to zero, and the PSFCH length may be used as BWP or One of the parameters of the carrier can be configured, and it can also be configured independently, etc., which will not be repeated one by one.
[0158]
The above illustrates the necessity of indicating the length of the PSFCH from the perspective of the influence of the PSFCH on the AGC. In fact, the indicated length information is not limited to the PSFCH length, and can also be extended to other scenarios.
[0159]
FIG. 21 is another schematic diagram of side link resources according to an embodiment of the present invention. For example, as shown in FIG. 21, UE 1 using numerology 1 and UE 2 using numerology 2 have frequency division multiplexing or UE 1 receives UE 1 2 Interference. Since different numerologies have different subcarrier intervals, the length of the time slot is different. Since the two time slots (slot 1 and slot 2) of UE 2 may not have information sent at the same time, or there are different devices in slot 1 and slot 2 respectively, the received power of UE 1 in one time slot may also occur Change, which also requires multiple AGC estimations. For FIG. 21, the length of the time slot of numerology 2 can be notified to UE 1 as a kind of length information, so that UE 1 can perform more accurate AGC estimation.
[0160]
Figure 22 is another schematic diagram of side link resources in an embodiment of the present invention. For example, as shown in Figure 22, although UE 1 and UE 2 use the same numerology, UE 2 uses mini-slots (or called mini-slots, mini-slots). Slot or non-slot) transmission, because the granularity of information transmission in the time domain is different, it will also cause a result similar to Figure 21. For Figure 22, the length of the mini-slot can be notified to UE 1 as a kind of length information, so that UE 1 can perform more accurate AGC estimation.
[0161]
FIG. 21 and FIG. 22 are only used as examples to illustrate schematically. The length of time slots of different numerology can have other multiple relationships, and the length of time slots and mini time slots can also have multiple relationships of other multiples, which are not listed one by one. In addition, it can be extended to the combination of FIG. 21 and FIG. 22. For example, UE 2 can use a different numerology from UE 1 and use mini-slots at the same time. The configuration of the length information can use any method of configuring the length of the PSFCH as described before, which will not be repeated.
[0162]
The above embodiments only exemplify the embodiments of the present invention, but the present invention is not limited to this, and appropriate modifications can also be made on the basis of the above embodiments. For example, each of the above embodiments may be used alone, or one or more of the above embodiments may be combined.
[0163]
It can be seen from the foregoing embodiment that the second device receives the length information indicating the length of the first part of a time slot sent by the terminal device or the network device; and the second device performs side link communication with the first device according to the length information. In this way, the second device can process the first part according to the length information, so that the performance of side link transmission can be improved (for example, the accuracy of AGC estimation can be improved).
[0164]
Example 2
[0165]
The embodiment of the present invention provides a side link resource multiplexing method. The second embodiment can be implemented separately or combined with the first embodiment. The content of this embodiment 2 that is the same as that of embodiment 1 will not be repeated.
[0166]
In the embodiment of the present invention, the second device transmits and/or receives side link information with the first device in a time slot; wherein, the time slot includes at least a first part and a second part; the time slot The first part in is configured with a first demodulation reference signal; and the second part in the time slot is configured with a second demodulation reference signal.
[0167]
From Embodiment 1, the influence of PSFCH on the PSSCH multiplexed with it can be seen. FIG. 23 is another schematic diagram of side link resources according to an embodiment of the present invention, and FIG. 24 is another schematic diagram of side link resources according to an embodiment of the present invention. , Shows the impact of two PSFCH slot structures on the PSSCH. As shown in Figures 23 and 24, the PSSCH at the rear of the time slot is multiplexed with PSFCH. As mentioned earlier, the multiplexing here can be frequency division multiplexing or multiplexing in a set of overlapping time-frequency resources. , So that the PSSCH is interfered by the PSFCH.
[0168]
Due to the influence of PSFCH multiplexing, the PSSCH at the back of the time slot and the PSSCH at the front of the time slot need to be independently estimated for AGC. Therefore, even if the PSSCH is sent in one time slot, the front PSSCH and the back PSSCH in the time slot need to be independent AGC estimate symbol. For example, the AGC 2 symbol before the PSSCH at the rear of the slot in FIG. 23 and the GUARD 2 & AGC 2 symbol before the PSSCH at the rear of the slot in FIG. 24 can be used as the AGC estimation symbols for the PSSCH.
[0169]
If the DM-RS position configuration method of NR Rel-15 is used, since the PSSCH uses the entire time slot for transmission, the position of the DM-RS used for PSSCH demodulation will depend on the length of the entire time slot. For the specific DM-RS position, please refer to the standard Section 6.4.1.1 of TS 38.211f30. However, the DM-RS configuration that reuses NR may cause collisions between the DM-RS symbol and the AGC symbol, that is, a certain DM-RS symbol is located in the AGC symbol position of the rear PSSCH, for example, the DM-RS is located in the AGC 2 symbol in Figure 23 or GUARD 2&AGC 2 symbols in Figure 24. Considering that the length of the PSFCH may also be configurable or variable, the collision between the DM-RS symbol and the AGC symbol described above is likely to occur. Since the AGC symbol cannot be used for demodulation, the DM-RS located at the position of the AGC symbol cannot be used, resulting in loss of channel estimation performance.
[0170]
To solve this problem, when the PSSCH is sent in the entire time slot, the DM-RS position is not determined according to the entire time slot length, but according to the symbol length occupied by the front PSSCH and the rear PSSCH in the time slot (excluding the protection The interval and AGC symbol) independently determine the positions of the front and rear DM-RS, that is, the DM-RS is independently configured for the front PSSCH and the rear PSSCH.
[0171]
As shown in Figures 23 and 24, for example, two independent DM-RS configurations are used in one slot, namely DM-RS configuration #1 and DM-RS configuration #2. DM-RS configuration #1 is used to determine the front part The DM-RS symbol position of the PSSCH depends on the number of symbols occupied by the front PSSCH (excluding the guard interval and AGC symbols). DM-RS configuration #2 is used to determine the DM-RS symbol position of the rear PSSCH, which depends on The number of symbols occupied by the rear PSSCH (excluding the guard interval and AGC symbols). Regardless of whether one DM-RS configuration or two DM-RS configurations are used, there is no restriction on the specific configuration method of the DM-RS position. For example, the method in section 6.4.1.1 of TS 38.211f30 can be used. In short, the DM-RS symbol is not located in the guard interval and the AGC symbol position in the time slot.
[0172]
In an embodiment, the first demodulation reference signal and/or the second demodulation reference signal are configured or pre-configured or predefined to be related to one or a group of time-frequency resources; the time-frequency resources are in The time domain includes one or more time slots, and the frequency domain includes one or more resource blocks.
[0173]
In an embodiment, the time-frequency resource is configured by at least one of the following: radio resource control (RRC) signaling, system information (SI), side link control information (SCI), and downlink control information (DCI). The time-frequency resource includes at least one of the following: a receiving resource pool, a sending resource pool, a partial bandwidth (BWP), a carrier, and a component carrier.
[0174]
For DM-RS positions, using one DM-RS configuration in one time slot and using multiple DM-RS configurations in one time slot can coexist. For example, for a resource pool configured with a PSFCH length and the PSFCH length is not zero, the resource pool can use multiple independent DM-RS configurations in a time slot, for example, as shown in Figure 23 or Figure 24; for the PSFCH length not configured Or a resource pool with a PSFCH length of zero. The resource pool can use a DM-RS configuration in one time slot, for example, the DM-RS configuration method of NR Rel-15 is used.
[0175]
FIG. 25 is another schematic diagram of resource pool configuration according to an embodiment of the present invention. As shown in FIG. 25, for resource pool i, two independent DM-RS configurations can be configured, and for resource pool j, one DM-RS can be configured Configuration. By configuring two independent DM-RSs, the accuracy of side link channel estimation can be improved.
[0176]
Example 3
[0177]
The embodiment of the present invention provides a side link resource multiplexing method. This embodiment 3 can be implemented separately, can also be implemented in combination with embodiment 1, can also be implemented in combination with embodiment 2, and can also be implemented with embodiment 1. , 2 are implemented in combination. The content of this embodiment 3 that is the same as that of Embodiments 1 and 2 will not be repeated.
[0178]
In the embodiment of the present invention, the second device transmits and/or receives side link information with the first device in a time slot; wherein, when at least two transmission powers are required in the time slot, use The largest transmission power of the at least two transmission powers is used as the transmission power of the time slot.
[0179]
FIG. 26 is another schematic diagram of side link resources according to an embodiment of the present invention. As shown in FIG. 26, for example, for UE 1, it may need to send PSCCH and PSSCH to UE 2 in a certain time slot, and pass through the time slot. The PSFCH sends feedback information to UE 3, that is, UE 1 supports two unicast sessions with UE 2 and UE 3.
[0180]
Power control is of great significance to unicast. Power control can meet their own business needs while avoiding interference to other devices. However, since the PSCCH/PSSCH and PSFCH in the same time slot have different destination devices, for example, the distance between UE 1 and UE 2 is much smaller than the distance between UE 1 and UE 3, and the transmission power determined by power control may also be possible. different.
[0181]
For example, as shown in Figure 26, the transmit power of PSCCH/PSSCH is Pm, and the transmit power of PSFCH is Pn; the specific process of determining the final transmit power through power control can be found in section 7 of TS 38.213, which will not be repeated here. Therefore, UE 1 needs to adjust the power in a time slot, that is, the power adjustment at the symbol level, which is analogous to the power adjustment at the time slot level (or subframe level) of NR Rel-15. Such dynamic power adjustment (symbol level) Power adjustment) will increase the complexity of the hardware implementation of the device, and increase higher requirements for the device's capabilities.
[0182]
To solve this problem, UE 1 can select the higher power of PSCCH/PSSCH and PSFCH as the final transmission power, that is, P=max{Pm,Pn}, and always use the power P for PSCCH and PSSCH in the time slot. Send with PSFCH. For the smaller transmission power of Pm and Pn, Pmin=min{Pm,Pn}, the adjusted transmission power P is higher than the original power value Pmin determined by power control, and the receiving device of Pmin does not know the actual transmission power. Adjustment.
[0183]
In one embodiment, the at least two transmission powers include a first transmission power that is the maximum transmission power and a second transmission power that is less than the maximum transmission power.
[0184]
In an embodiment, for the second transmission power, a phase modulation method is used to transmit the information associated with the second transmission power. For example, side link control information (SCI) can be used to indicate the phase modulation mode.
[0185]
For example, in order not to affect the normal reception of the device, the UE 1 can use a phase modulation method (such as QPSK and other modulation methods) to send information to it. Accordingly, the code rate needs to be adjusted according to the phase modulation method, and the actual used value in the SCI The modulation and coding method is notified to the receiving device of Pmin. Since the power level does not affect the demodulation performance of the phase modulation symbol, the device receiving the phase modulation symbol (corresponding to the power Pmin) can still receive the demodulation correctly, and the power adjustment is transparent to the device .
[0186]
In an embodiment, at least one of the following signaling or information may be used to transmit the first transmission power to the receiving device of the second transmission power: radio resource control (RRC) signaling, system information (SI) , Side Link Control Information (SCI), Downlink Control Information (DCI).
[0187]
In an embodiment, at least one of the following signaling or information may also be used to send the difference or ratio between the first transmission power and the second transmission power to the receiving device of the second transmission power : Radio Resource Control (RRC) signaling, system information (SI), side link control information (SCI), downlink control information (DCI).
[0188]
For example, the UE 1 may also notify the receiving device of Pmin of the adjusted power P through signaling (for example, SCI). Alternatively, the UE 1 can also notify the receiving device of Pmin of the variable ΔP=P-Pmin or ΔP=Pmin-P of the power through signaling (such as SCI), so that the receiving device can recover the actual transmission power P.
[0189]
Therefore, when more than one type of power needs to be used for transmission in a time slot, the largest power among them is used for transmission, which can reduce the complexity of power control and power adjustment.
[0190]
Example 4
[0191]
The embodiment of the present invention provides a method for indicating side link resources, in which a terminal device or a network device instructs a second device. The terminal device may be the first device that performs side link communication with the second device, or may be other terminal devices, and the present invention is not limited to this.
[0192]
In the embodiment of the present invention, the terminal device or the network device sends length information indicating the length of the first part of a time slot to the second device; wherein, the length information is used by the second device to communicate with the first device. The sending and/or receiving of side link information.
[0193]
In one embodiment, the length information is used by the second device to perform AGC on the first part.
[0194]
In an embodiment, the length information includes at least one of the following: the length of the physical side link feedback channel, the length of the time slot corresponding to the Numerology, and the length of the mini-slot.
[0195]
In an embodiment, the side link information includes information carried by at least one of the following channels: a physical side link control channel, a physical side link shared channel, and a physical side link feedback channel.
[0196]
In one embodiment, when there are at least two of the first part lengths within a time range that overlaps with the one time slot in time, the at least two first part lengths are configured to be the same.
[0197]
In an embodiment, the length information is configured by at least one of the following: radio resource control (RRC) signaling, system information (SI), side link control information (SCI), and downlink control information (DCI).
[0198]
In an embodiment, the cyclic redundancy check (CRC) of the side link control information is scrambled using a public identifier.
[0199]
In an embodiment, the side link control information indicates at least one of the following: the length of the physical side link feedback channel, the time slot where the physical side link feedback channel is located, the symbol where the physical side link feedback channel is located, and the physical side link The resource block where the path feedback channel is located, the time slot where the physical side link shared channel is located, the symbol where the physical side link shared channel is located, and the resource block where the physical side link shared channel is located.
[0200]
In an embodiment, the length information is configured or pre-configured or pre-defined to be related to one or a group of time-frequency resources; the time-frequency resources include one or more time slots in the time domain, and in the frequency domain Contains one or more resource blocks.
[0201]
In an embodiment, the time-frequency resource is configured by at least one of the following: radio resource control (RRC) signaling, system information, side link control information, and downlink control information.
[0202]
In an embodiment, the time-frequency resource includes at least one of the following: a receiving resource pool, a sending resource pool, a partial bandwidth (BWP), a carrier, and a component carrier.
[0203]
In one embodiment, the length information is predefined.
[0204]
In an embodiment, the first one or more symbols of the first part in the time slot carry information used for the automatic gain control.
[0205]
In an embodiment, the first one or more symbols of the first part in the time slot are used as a guard interval.
[0206]
In an embodiment, the previous symbol of the first part in the time slot carries information used for the automatic gain control and serves as a guard interval.
[0207]
In an embodiment, the time slot further includes at least one second part; and the first one or more symbols of the second part in the time slot carry information for the automatic gain control and/or serve as Guard interval.
[0208]
In an embodiment, the second part is a physical side link control channel and/or a physical side link shared channel.
[0209]
In one embodiment, the first part of the time slot is configured with a first demodulation reference signal; and other parts of the time slot are configured with at least a second demodulation reference signal.
[0210]
In an embodiment, the first demodulation reference signal and/or the second demodulation reference signal are configured or pre-configured or predefined to be related to one or a group of time-frequency resources; the time-frequency resources are in The time domain includes one or more time slots, and the frequency domain includes one or more resource blocks.
[0211]
In an embodiment, the time-frequency resource is configured by at least one of the following: radio resource control (RRC) signaling, system information (SI), side link control information (SCI), and downlink control information (DCI).
[0212]
In an embodiment, the time-frequency resource includes at least one of the following: a receiving resource pool, a sending resource pool, a partial bandwidth (BWP), a carrier, and a component carrier.
[0213]
In an embodiment, in a case where at least two transmission powers are required in the time slot, the largest transmission power of the at least two transmission powers is used as the transmission power of the time slot.
[0214]
It can be seen from the foregoing embodiment that the second device receives the length information indicating the length of the first part of a time slot sent by the terminal device or the network device; and the second device performs side link communication with the first device according to the length information. In this way, the second device can process the first part according to the length information, so that the performance of side link transmission can be improved (for example, the accuracy of AGC estimation can be improved).
[0215]
In addition, the first part of the time slot is configured with a first demodulation reference signal; and the second part of the time slot is configured with a second demodulation reference signal. By independently configuring at least two DM-RSs, the accuracy of side link channel estimation can be improved.
[0216]
In addition, when more than one type of power needs to be used for transmission in a time slot, the largest power among them is used for transmission, which can reduce the complexity of power control and power adjustment.
[0217]
Example 5
[0218]
The embodiment of the present invention provides a side link resource multiplexing device. The device may be, for example, a terminal device, or may be some or some components or components configured in the terminal device. However, the present invention is not limited to this. For example, it may be a roadside device or a network device, and may also be one or some components or components configured in a roadside device or a network device. The content of this embodiment 5 that is the same as that of embodiments 1 to 3 will not be repeated.
[0219]
FIG. 27 is a schematic diagram of a side link resource multiplexing device according to an embodiment of the present invention. As shown in FIG. 27, the side link resource multiplexing device 2700 includes:
[0220]
A receiving unit 2701, which receives length information indicating the length of the first part of a time slot sent by a terminal device or a network device; and
[0221]
The processing unit 2702 is configured to send and/or receive side link information with the first device according to the length information.
[0222]
In an embodiment, the processing unit is further configured to perform automatic gain control on the first part according to the length information.
[0223]
In an embodiment, the length information includes at least one of the following: the length of the physical side link feedback channel, the length of the time slot corresponding to the standard, and the length of the mini-slot.
[0224]
In an embodiment, the side link information includes information carried by at least one of the following channels: a physical side link control channel, a physical side link shared channel, and a physical side link feedback channel.
[0225]
In one embodiment, when there are at least two of the first part lengths within a time range that overlaps with the one time slot in time, the at least two first part lengths are configured to be the same.
[0226]
In an embodiment, the length information is configured by at least one of the following: radio resource control signaling, system information, side link control information, and downlink control information.
[0227]
In an embodiment, the cyclic redundancy check code of the side link control information is scrambled using a public identifier; the side link control information indicates at least one of the following: the length of the physical side link feedback channel, the physical The time slot where the side link feedback channel is located, the symbol where the physical side link feedback channel is located, the resource block where the physical side link feedback channel is located, the time slot where the physical side link shared channel is located, the symbol where the physical side link shared channel is located, and the physical side link The resource block where the shared channel is located.
[0228]
In an embodiment, the length information is configured or pre-configured or pre-defined to be related to one or a group of time-frequency resources; the time-frequency resources include one or more time slots in the time domain, and in the frequency domain Contains one or more resource blocks.
[0229]
In an embodiment, the time-frequency resource is configured by at least one of the following: radio resource control signaling, system information, side link control information, and downlink control information.
[0230]
In an embodiment, the time-frequency resource includes at least one of the following: a receiving resource pool, a sending resource pool, a partial bandwidth, a carrier, and a component carrier.
[0231]
In one embodiment, the length information is predefined.
[0232]
In one embodiment, the first or more symbols of the first part in the time slot carry information for automatic gain control; and the first or more symbols of the first part in the time slot serve as protection interval.
[0233]
In an embodiment, the time slot further includes at least one second part; and the first one or more symbols of the second part in the time slot carry information for automatic gain control and/or serve as a guard interval .
[0234]
In one embodiment, the first part of the time slot is configured with a first demodulation reference signal; and other parts of the time slot are configured with at least a second demodulation reference signal.
[0235]
In an embodiment, the first demodulation reference signal and/or the second demodulation reference signal are configured or pre-configured or predefined to be related to one or a group of time-frequency resources; the time-frequency resources are in The time domain includes one or more time slots, and the frequency domain includes one or more resource blocks.
[0236]
In an embodiment, the time-frequency resource is configured by at least one of the following: radio resource control signaling, system information, side link control information, and downlink control information.
[0237]
In an embodiment, the time-frequency resource includes at least one of the following: a receiving resource pool, a sending resource pool, a partial bandwidth, a carrier, and a component carrier.
[0238]
In an embodiment, in a case where at least two transmission powers are required in the time slot, the largest transmission power of the at least two transmission powers is used as the transmission power of the time slot.
[0239]
It is worth noting that the above only describes the components or modules related to the present invention, but the present invention is not limited to this. The side link resource multiplexing apparatus 2700 may also include other components or modules. For the specific content of these components or modules, reference may be made to related technologies.
[0240]
In addition, for the sake of simplicity, FIG. 27 only exemplarily shows the connection relationship or signal direction between the various components or modules, but it should be clear to those skilled in the art that various related technologies such as bus connection can be used. The above-mentioned various components or modules can be implemented by hardware facilities such as a processor, a memory, a transmitter, and a receiver; the implementation of the present invention does not limit this.
[0241]
It can be seen from the foregoing embodiment that the second device receives the length information indicating the length of the first part of a time slot sent by the terminal device or the network device; and the second device performs side link communication with the first device according to the length information. In this way, the second device can process the first part according to the length information, so that the performance of side link transmission can be improved (for example, the accuracy of AGC estimation can be improved).
[0242]
In addition, the first part of the time slot is configured with a first demodulation reference signal; and the second part of the time slot is configured with a second demodulation reference signal. By independently configuring at least two DM-RSs, the accuracy of side link channel estimation can be improved.
[0243]
In addition, when more than one type of power needs to be used for transmission in a time slot, the largest power among them is used for transmission, which can reduce the complexity of power control and power adjustment.
[0244]
Example 6
[0245]
The embodiment of the present invention provides a side link resource indicator device. The apparatus may be, for example, a terminal device or a network device, and may also be one or some components or components configured in the terminal device or the network device. However, the present invention is not limited to this. For example, it may be a roadside device, or it may be one or some parts or components of the roadside device. The content of this embodiment 6 that is the same as that of embodiment 4 will not be repeated.
[0246]
FIG. 28 is a schematic diagram of a side link resource indicating device according to an embodiment of the present invention. As shown in FIG. 28, the side link resource indicating device 2800 includes:
[0247]
A sending unit 2801, which sends length information indicating the length of the first part of a time slot to the second device; wherein the length information is used by the second device to send side link information with the first device and /Or receive.
[0248]
It is worth noting that the above only describes the components or modules related to the present invention, but the present invention is not limited to this. The side link resource indicating device 2800 may also include other components or modules. For the specific content of these components or modules, reference may be made to related technologies.
[0249]
In addition, for the sake of simplicity, FIG. 28 only exemplarily shows the connection relationship or signal direction between various components or modules, but it should be clear to those skilled in the art that various related technologies such as bus connection can be used. The above-mentioned various components or modules can be implemented by hardware facilities such as a processor, a memory, a transmitter, and a receiver; the implementation of the present invention does not limit this.
[0250]
It can be seen from the foregoing embodiment that the second device receives the length information indicating the length of the first part of a time slot sent by the terminal device or the network device; and the second device performs side link communication with the first device according to the length information. In this way, the second device can process the first part according to the length information, so that the performance of side link transmission can be improved (for example, the accuracy of AGC estimation can be improved).
[0251]
In addition, the first part of the time slot is configured with a first demodulation reference signal; and the second part of the time slot is configured with a second demodulation reference signal. By independently configuring at least two DM-RSs, the accuracy of side link channel estimation can be improved.
[0252]
In addition, when more than one type of power needs to be used for transmission in a time slot, the largest power among them is used for transmission, which can reduce the complexity of power control and power adjustment.
[0253]
Example 7
[0254]
The embodiment of the present invention also provides a communication system, which can refer to FIG. 1, and the same content as in Embodiments 1 to 6 will not be repeated. In this embodiment, the communication system 100 may include:
[0255]
The first device 102 performs side link communication with the second device 103; and
[0256]
The second device 103 receives length information indicating the length of the first part of a time slot sent by a terminal device or a network device; and sends and/or receives side link information with the first device 102 according to the length information .
[0257]
As shown in FIG. 1, the communication system 100 may further include:
[0258]
The network device 101 provides services for the first device 102 and/or the second device 103. For example, the network device 101 sends to the second device 103 length information indicating the length of the first part of a time slot.
[0259]
The embodiment of the present invention also provides a network device, which may be a base station, for example, but the present invention is not limited to this, and may also be other network devices.
[0260]
FIG. 29 is a schematic diagram of the structure of a network device according to an embodiment of the present invention. As shown in FIG. 29, the network device 2900 may include: a processor 2910 (for example, a central processing unit CPU) and a memory 2920; the memory 2920 is coupled to the processor 2910. The memory 2920 can store various data; in addition, it also stores an information processing program 2930, and the program 2930 is executed under the control of the processor 2910.
[0261]
For example, the processor 2910 may be configured to execute a program to implement the side link resource indication method as described in Embodiment 4. For example, the processor 2910 may be configured to perform the following control: send length information indicating the length of the first part of a time slot to the second device; wherein the length information is used by the second device to communicate with the first device. Send and/or receive side link information.
[0262]
In addition, as shown in FIG. 29, the network device 2900 may further include: a transceiver 2940, an antenna 2950, ​​etc.; wherein the functions of the above-mentioned components are similar to those of the prior art, and will not be repeated here. It is worth noting that the network device 2900 does not necessarily include all the components shown in FIG. 29; in addition, the network device 2900 may also include components not shown in FIG. 29, and the prior art can be referred to.
[0263]
The embodiment of the present invention also provides a terminal device, but the present invention is not limited to this, and may also be other devices.
[0264]
Fig. 30 is a schematic diagram of a terminal device according to an embodiment of the present invention. As shown in FIG. 30, the terminal device 3000 may include a processor 3010 and a memory 3020; the memory 3020 stores data and programs, and is coupled to the processor 3010. It is worth noting that this figure is exemplary; other types of structures can also be used to supplement or replace this structure to implement telecommunication functions or other functions.
[0265]
For example, the processor 3010 may be configured to execute a program to implement the side link resource multiplexing method as described in Embodiment 1. For example, the processor 3010 may be configured to perform the following control: receive length information indicating the length of the first part of a time slot sent by a terminal device or a network device; and send side link information with the first device according to the length information And/or receive.
[0266]
For another example, the processor 3010 may be configured to execute a program to implement the side link resource multiplexing method described in Embodiment 2. For example, the processor 3010 may be configured to perform the following control: send and/or receive side link information with the first device in a time slot; wherein, the time slot includes at least a first part and a second part; The first part of the time slot is configured with a first demodulation reference signal; and the second part of the time slot is configured with a second demodulation reference signal.
[0267]
For another example, the processor 3010 may be configured to execute a program to implement the side link resource multiplexing method as described in Embodiment 3. For example, the processor 3010 may be configured to perform the following control: transmit and/or receive side link information with the first device in a time slot; where at least two transmission powers are required in the time slot Next, the largest transmission power among the at least two transmission powers is used as the transmission power of the time slot.
[0268]
As shown in FIG. 30, the terminal device 3000 may further include: a communication module 3030, an input unit 3040, a display 3050, and a power supply 3060. Among them, the functions of the above-mentioned components are similar to those of the prior art, and will not be repeated here. It is worth noting that the terminal device 3000 does not necessarily include all the components shown in FIG. 30, and the above-mentioned components are not necessary; in addition, the terminal device 3000 may also include components not shown in FIG. There is technology.
[0269]
An embodiment of the present invention also provides a computer program, wherein when the program is executed in a terminal device, the program causes the terminal device to execute the side link resource multiplexing method or embodiment described in Embodiments 1 to 3. The side link resource multiplexing method described in 4.
[0270]
An embodiment of the present invention also provides a storage medium storing a computer program, wherein the computer program enables the terminal device to execute the side link resource multiplexing method described in Embodiments 1 to 3 or the side link resource multiplexing method described in Embodiment 4. Resource indication method.
[0271]
An embodiment of the present invention also provides a computer program, wherein when the program is executed in a network device, the program causes the network device to execute the side link resource multiplexing method or embodiment described in Embodiments 1 to 3. The side link resource multiplexing method described in 4.
[0272]
The embodiment of the present invention also provides a storage medium storing a computer program, wherein the computer program causes a network device to execute the side link resource multiplexing method described in Embodiments 1 to 3 or the side link resource multiplexing method described in Embodiment 4. Resource indication method.
[0273]
The above devices and methods of the present invention can be implemented by hardware, or can be implemented by hardware combined with software. The present invention relates to such a computer-readable program, when the program is executed by a logic component, the logic component can realize the above-mentioned device or constituent component, or the logic component can realize the above-mentioned various methods Or steps. The present invention also relates to storage media for storing the above programs, such as hard disks, magnetic disks, optical disks, DVDs, flash memory, and the like.
[0274]
The method/device described in conjunction with the embodiments of the present invention may be directly embodied as hardware, a software module executed by a processor, or a combination of the two. For example, one or more of the functional block diagrams and/or one or more combinations of the functional block diagrams shown in the figure may correspond to each software module of the computer program flow, or may correspond to each hardware module. These software modules can respectively correspond to the steps shown in the figure. These hardware modules can be implemented, for example, by using a field programmable gate array (FPGA) to solidify these software modules.
[0275]
The software module can be located in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable disk, CD-ROM or any other form of storage medium known in the art. A storage medium may be coupled to the processor, so that the processor can read information from the storage medium and write information to the storage medium; or the storage medium may be a component of the processor. The processor and the storage medium may be located in the ASIC. The software module can be stored in the memory of the mobile terminal, or can be stored in a memory card that can be inserted into the mobile terminal. For example, if the device (such as a mobile terminal) uses a larger-capacity MEGA-SIM card or a large-capacity flash memory device, the software module can be stored in the MEGA-SIM card or a large-capacity flash memory device.
[0276]
One or more of the functional blocks and/or one or more combinations of the functional blocks described in the drawings can be implemented as general-purpose processors, digital signal processors (DSPs) for performing the functions described in the present invention. ), application specific integrated circuit (ASIC), field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component or any appropriate combination thereof. One or more of the functional blocks described in the drawings and/or one or more combinations of the functional blocks can also be implemented as a combination of computing devices, for example, a combination of a DSP and a microprocessor, or multiple micro-processing Processor, one or more microprocessors in communication with the DSP, or any other such configuration.
[0277]
The present invention has been described above in conjunction with specific embodiments, but it should be clear to those skilled in the art that these descriptions are all exemplary and do not limit the protection scope of the present invention. Those skilled in the art can make various variations and modifications to the present invention according to the spirit and principle of the present invention, and these variations and modifications are also within the scope of the present invention.
[0278]
Regarding the implementation including the above examples, the following supplementary notes are also disclosed:
[0279]
Supplement 1. A side link resource multiplexing method, including:
[0280]
The second device receives length information indicating the length of the first part of a time slot sent by the terminal device or the network device; and
[0281]
The second device sends and/or receives side link information with the first device according to the length information.
[0282]
Supplement 2. The method according to Supplement 1, wherein:
[0283]
The second device performs automatic gain control on the first part according to the length information.
[0284]
Supplement 3. The method according to Supplement 1 or 2, wherein the length information includes at least one of the following: the length of the physical side link feedback channel, the length of the time slot corresponding to the Numerology, and the mini time slot (mini -slot) length.
[0285]
Supplement 4. The method according to any one of Supplements 1 to 3, wherein the side link information includes information carried by at least one of the following channels: physical side link control channel, physical side link sharing Channel, physical side link feedback channel.
[0286]
Supplement 5. The method according to any one of Supplements 1 to 4, wherein, when there are at least two lengths of the first part within a time range that overlaps with the one time slot in time, the at least The lengths of the two first parts are configured to be the same.
[0287]
Supplement 6. The method according to any one of Supplements 1 to 5, wherein the length information is configured by at least one of the following: radio resource control (RRC) signaling, system information (SI), side link control Information (SCI), Downlink Control Information (DCI).
[0288]
Supplement 7. The method according to Supplement 6, wherein the cyclic redundancy check (CRC) of the side link control information is scrambled using a public identifier.
[0289]
Appendix 8. The method according to Appendix 7, wherein the side link control information indicates at least one of the following: the length of the physical side link feedback channel, the time slot where the physical side link feedback channel is located, and the physical side link The symbol where the path feedback channel is located, the resource block where the physical side link feedback channel is located, the time slot where the physical side link shared channel is located, the symbol where the physical side link shared channel is located, and the resource block where the physical side link shared channel is located.
[0290]
Supplement 9. The method according to Supplement 6, wherein, when the first length information configured by the side link control information (SCI) and/or the downlink control information (DCI) in a certain time slot is different from the first length information configured by the side link control information (SCI) and/or the downlink control information (DCI) When the second length information configured by the radio resource control (RRC) signaling and/or the system information (SI) is different, the length information of the time slot is determined as the first length information.
[0291]
Supplement 10. The method according to any one of Supplements 1 to 9, wherein the length information is configured or pre-configured or predefined to be related to one or a group of time-frequency resources; the time-frequency resources are in time The domain contains one or more time slots, and the frequency domain contains one or more resource blocks.
[0292]
Appendix 11. The method according to Appendix 10, wherein the time-frequency resource is configured by at least one of the following: radio resource control (RRC) signaling, system information, side link control information, and downlink control information.
[0293]
Supplement 12. The method according to Supplement 10 or 11, wherein the time-frequency resource includes at least one of the following: a receiving resource pool, a sending resource pool, a partial bandwidth (BWP), a carrier, and a component carrier.
[0294]
Supplement 13. The method according to any one of Supplements 1 to 5, wherein the length information is predefined.
[0295]
Supplement 14. The method according to any one of Supplements 1 to 13, wherein the first one or more symbols of the first part in the time slot carry information used for the automatic gain control.
[0296]
Supplement 15. The method according to Supplement 14, wherein the first one or more symbols of the first part in the time slot are used as a guard interval.
[0297]
Supplement 16. The method according to any one of Supplements 1 to 13, wherein the previous symbol of the first part in the time slot carries information used for the automatic gain control and serves as a guard interval.
[0298]
Supplement 17. The method according to any one of Supplements 1 to 16, wherein the time slot further includes at least one second part; and one or more symbols before the second part in the time slot Carry information used for the automatic gain control and/or as a guard interval.
[0299]
Supplement 18. The method according to Supplement 17, wherein the second part is a physical side link control channel and/or a physical side link shared channel.
[0300]
Supplement 19. The method according to any one of Supplements 1 to 18, wherein the first part of the time slot is configured with a first demodulation reference signal; and other parts of the time slot are At least a second demodulation reference signal is configured.
[0301]
Supplement 20. The method according to Supplement 19, wherein the first demodulation reference signal and/or the second demodulation reference signal are configured or pre-configured or pre-defined to be associated with one or a group of time-frequency Resource-related; the time-frequency resource includes one or more time slots in the time domain and one or more resource blocks in the frequency domain.
[0302]
Supplement 21. The method according to Supplement 20, wherein the time-frequency resource is configured by at least one of the following: radio resource control (RRC) signaling, system information (SI), and side link control information (SCI) , Downlink control information (DCI).
[0303]
Supplement 22. The method according to Supplement 20 or 21, wherein the time-frequency resource includes at least one of the following: a receiving resource pool, a sending resource pool, a partial bandwidth (BWP), a carrier, and a component carrier.
[0304]
Supplement 23. The method according to any one of Supplements 1 to 22, wherein:
[0305]
In the case where at least two transmission powers are required in the time slot, the largest transmission power of the at least two transmission powers is used as the transmission power of the time slot.
[0306]
Supplement 24. The method according to Supplement 23, wherein the at least two transmission powers include a first transmission power that is the maximum transmission power and a second transmission power that is less than the maximum transmission power.
[0307]
Supplement 25. The method according to Supplement 24, wherein, for the second transmission power, a phase modulation method is used to transmit the information associated with the second transmission power.
[0308]
Supplement 26. The method according to Supplement 25, wherein side link control information (SCI) is used to indicate the phase modulation mode.
[0309]
Supplement 27. The method according to Supplement 24, wherein at least one of the following signaling or information is used to send the first transmission power to the receiving device of the second transmission power: radio resource control (RRC) Signaling, system information (SI), side link control information (SCI), downlink control information (DCI).
[0310]
Supplement 28. The method according to Supplement 24, wherein at least one of the following signaling or information is used to send the difference or ratio between the first transmission power and the second transmission power to the The receiving device of the second transmission power: radio resource control (RRC) signaling, system information (SI), side link control information (SCI), and downlink control information (DCI).
[0311]
Supplement 29. A method for multiplexing side link resources, including:
[0312]
The second device sends and/or receives side link information with the first device in a time slot;
[0313]
Wherein, the time slot includes at least a first part and a second part; the first part in the time slot is configured with a first demodulation reference signal; and the second part in the time slot is configured with The second demodulation reference signal.
[0314]
Supplement 30. The method according to Supplement 29, wherein the first demodulation reference signal and/or the second demodulation reference signal are configured or pre-configured or predefined to be associated with one or a group of time-frequency Resource-related; the time-frequency resource includes one or more time slots in the time domain and one or more resource blocks in the frequency domain.
[0315]
Supplement 31. The method according to Supplement 30, wherein the time-frequency resource is configured by at least one of the following: radio resource control (RRC) signaling, system information (SI), and side link control information (SCI) , Downlink control information (DCI).
[0316]
Supplement 32. The method according to Supplement 30 or 31, wherein the time-frequency resource includes at least one of the following: a receiving resource pool, a sending resource pool, a partial bandwidth (BWP), a carrier, and a component carrier.
[0317]
Supplement 33. A side link resource multiplexing method, including:
[0318]
The second device sends and/or receives side link information with the first device in a time slot;
[0319]
Wherein, in the case where at least two transmission powers are required in the time slot, the largest transmission power of the at least two transmission powers is used as the transmission power of the time slot.
[0320]
Supplement 34. The method according to Supplement 33, wherein the at least two transmission powers include a first transmission power that is the maximum transmission power and a second transmission power that is less than the maximum transmission power.
[0321]
Supplement 35. The method according to Supplement 34, wherein, for the second transmission power, a phase modulation method is used to transmit the information associated with the second transmission power.
[0322]
Supplement 36. The method according to Supplement 35, wherein side link control information (SCI) is used to indicate the phase modulation mode.
[0323]
Supplement 37. The method according to Supplement 34, wherein at least one of the following signaling or information is used to send the first transmission power to the receiving device of the second transmission power: radio resource control (RRC) Signaling, system information (SI), side link control information (SCI), downlink control information (DCI).
[0324]
Supplement 38. The method according to Supplement 34, wherein at least one of the following signaling or information is used to send the difference or ratio between the first transmission power and the second transmission power to the The receiving device of the second transmission power: radio resource control (RRC) signaling, system information (SI), side link control information (SCI), and downlink control information (DCI).
[0325]
Supplement 39. A method for indicating side link resources, including:
[0326]
The terminal device or the network device sends length information indicating the length of the first part of a time slot to the second device;
[0327]
Wherein, the length information is used by the second device to send and/or receive side link information with the first device.
[0328]
Supplement 40. The method according to Supplement 39, wherein:
[0329]
The length information is used by the second device to perform automatic gain control on the first part.
[0330]
Supplement 41. The method according to Supplement 39 or 40, wherein the length information includes at least one of the following: the length of the physical side link feedback channel, the length of the time slot corresponding to the Numerology, and the mini time slot (mini -slot) length.
[0331]
Supplement 42. The method according to any one of Supplements 39 to 41, wherein the side link information includes information carried by at least one of the following channels: physical side link control channel, physical side link sharing Channel, physical side link feedback channel.
[0332]
Supplement 43. The method according to any one of Supplements 39 to 42, wherein when there are at least two lengths of the first part within a time range that overlaps with the one time slot in time, the at least The lengths of the two first parts are configured to be the same.
[0333]
Supplement 44. The method according to any one of Supplements 39 to 44, wherein the length information is configured by at least one of the following: radio resource control (RRC) signaling, system information (SI), side link control Information (SCI), Downlink Control Information (DCI).
[0334]
Supplement 45. The method according to Supplement 44, wherein the cyclic redundancy check (CRC) of the side link control information is scrambled using a public identifier.
[0335]
Supplement 46. The method according to Supplement 45, wherein the side link control information indicates at least one of the following: the length of the physical side link feedback channel, the time slot where the physical side link feedback channel is located, and the physical side link The symbol where the path feedback channel is located, the resource block where the physical side link feedback channel is located, the time slot where the physical side link shared channel is located, the symbol where the physical side link shared channel is located, and the resource block where the physical side link shared channel is located.
[0336]
Supplement 47. The method according to Supplement 44, wherein, when the first length information configured by the side link control information (SCI) and/or the downlink control information (DCI) in a certain time slot is compared with the first length information configured by the side link control information (SCI) and/or the downlink control information (DCI) When the second length information configured by the radio resource control (RRC) signaling and/or the system information (SI) is different, the length information of the time slot is determined as the first length information.
[0337]
Supplement 48. The method according to any one of Supplements 39 to 47, wherein the length information is configured or pre-configured or predefined to be related to one or a group of time-frequency resources; The domain contains one or more time slots, and the frequency domain contains one or more resource blocks.
[0338]
Supplement 49. The method according to Supplement 48, wherein the time-frequency resource is configured by at least one of the following: radio resource control (RRC) signaling, system information, side link control information, and downlink control information.
[0339]
Supplement 50. The method according to Supplement 48 or 49, wherein the time-frequency resource includes at least one of the following: a receiving resource pool, a sending resource pool, a partial bandwidth (BWP), a carrier, and a component carrier.
[0340]
Supplement 51. The method according to any one of Supplements 39 to 44, wherein the length information is predefined.
[0341]
Supplement 52. The method according to any one of Supplements 39 to 51, wherein the first one or more symbols of the first part in the time slot carry information used for the automatic gain control.
[0342]
Supplement 53. The method according to Supplement 52, wherein the first one or more symbols of the first part in the time slot are used as a guard interval.
[0343]
Supplement 54. The method according to any one of Supplements 39 to 51, wherein the previous symbol of the first part in the time slot carries information used for the automatic gain control and serves as a guard interval.
[0344]
Supplement 55. The method according to any one of Supplements 39 to 54, wherein the time slot further includes at least one second part; and one or more symbols before the second part in the time slot Carry information used for the automatic gain control and/or as a guard interval.
[0345]
Supplement 56. The method according to Supplement 55, wherein the second part is a physical side link control channel and/or a physical side link shared channel.
[0346]
Supplement 57. The method according to any one of Supplements 39 to 56, wherein the first part of the time slot is configured with a first demodulation reference signal; and other parts of the time slot are At least a second demodulation reference signal is configured.
[0347]
Supplement 58. The method according to Supplement 57, wherein the first demodulation reference signal and/or the second demodulation reference signal are configured or pre-configured or pre-defined to be associated with one or a group of time-frequency Resource-related; the time-frequency resource includes one or more time slots in the time domain and one or more resource blocks in the frequency domain.
[0348]
Supplement 59. The method according to Supplement 58, wherein the time-frequency resource is configured by at least one of the following: radio resource control (RRC) signaling, system information (SI), side link control information (SCI) , Downlink control information (DCI).
[0349]
Supplement 60. The method according to Supplement 58 or 59, wherein the time-frequency resource includes at least one of the following: a receiving resource pool, a sending resource pool, a partial bandwidth (BWP), a carrier, and a component carrier.
[0350]
Supplement 61. The method according to any one of Supplements 39 to 60, wherein:
[0351]
In the case where at least two transmission powers are required in the time slot, the largest transmission power of the at least two transmission powers is used as the transmission power of the time slot.
[0352]
Appendix 62. A terminal device comprising a memory and a processor, the memory storing a computer program, and the processor is configured to execute the computer program to implement the resource as described in any one of appendices 1 to 33 Multiplexing method, or resource indication method as described in any one of Supplementary Notes 34 to 61.
[0353]
Supplement 63. A network device comprising a memory and a processor, the memory storing a computer program, and the processor is configured to execute the computer program to implement the resource as described in any one of Supplements 34 to 61 Indication method.
Claims
[Claim 1]
A side link resource multiplexing device includes: a receiving unit that receives length information indicating the length of a first part of a time slot sent by a terminal device or a network device; and a processing unit that communicates with the first device according to the length information Send and/or receive side link information.
[Claim 2]
The device according to claim 1, wherein the processing unit is further configured to perform automatic gain control on the first part according to the length information.
[Claim 3]
The apparatus according to claim 1, wherein the length information includes at least one of the following: the length of the physical side link feedback channel, the length of the time slot corresponding to the standard, and the length of the mini-slot.
[Claim 4]
The apparatus according to claim 1, wherein the side link information includes information carried by at least one of the following channels: a physical side link control channel, a physical side link shared channel, and a physical side link feedback channel.
[Claim 5]
The apparatus according to claim 1, wherein, when there are at least two of the first partial lengths within a time range that overlaps with the one time slot in time, the at least two of the first partial lengths are configured For the same.
[Claim 6]
The apparatus according to claim 1, wherein the length information is configured by at least one of the following: radio resource control signaling, system information, side link control information, and downlink control information.
[Claim 7]
The apparatus according to claim 6, wherein the cyclic redundancy check code of the side link control information is scrambled by using a public identifier; and the side link control information indicates at least one of the following: physical side link feedback The length of the channel, the time slot where the physical side link feedback channel is located, the symbol where the physical side link feedback channel is located, the resource block where the physical side link feedback channel is located, the time slot where the physical side link shared channel is located, and the physical side link shared channel is located Symbol and physical side link share the resource block where the channel is located.
[Claim 8]
The apparatus according to claim 1, wherein the length information is configured or pre-configured or predefined to be related to one or a group of time-frequency resources; the time-frequency resources include one or more time slots in the time domain , Contains one or more resource blocks in the frequency domain.
[Claim 9]
The apparatus according to claim 8, wherein the time-frequency resource is configured by at least one of the following: radio resource control signaling, system information, side link control information, and downlink control information.
[Claim 10]
The apparatus according to claim 8, wherein the time-frequency resource includes at least one of the following: a receiving resource pool, a sending resource pool, a partial bandwidth, a carrier, and a component carrier.
[Claim 11]
The apparatus according to claim 1, wherein the length information is predefined.
[Claim 12]
The apparatus according to claim 1, wherein the first one or more symbols of the first part in the time slot carry information for automatic gain control; and the previous one or more symbols of the first part in the time slot Multiple symbols are used as guard intervals.
[Claim 13]
The apparatus according to claim 1, wherein the time slot further comprises at least one second part; and the first one or more symbols of the second part in the time slot carry information and information for automatic gain control. / Or as a guard interval.
[Claim 14]
The apparatus according to claim 1, wherein the first part of the time slot is configured with a first demodulation reference signal; and other parts of the time slot are configured with at least a second demodulation reference signal .
[Claim 15]
The apparatus according to claim 14, wherein the first demodulation reference signal and/or the second demodulation reference signal are configured or pre-configured or predefined to be related to one or a group of time-frequency resources; The time-frequency resource includes one or more time slots in the time domain and one or more resource blocks in the frequency domain.
[Claim 16]
The apparatus according to claim 15, wherein the time-frequency resource is configured by at least one of the following: radio resource control signaling, system information, side link control information, and downlink control information.
[Claim 17]
The apparatus according to claim 15, wherein the time-frequency resource includes at least one of the following: a receiving resource pool, a sending resource pool, a partial bandwidth, a carrier, and a component carrier.
[Claim 18]
The apparatus according to claim 1, wherein, in a case where at least two transmission powers are required in the time slot, the largest transmission power of the at least two transmission powers is used as the transmission power of the time slot.
[Claim 19]
An apparatus for indicating side link resources includes: a sending unit that sends length information for indicating the length of a first part of a time slot to a second device; wherein the length information is used by the second device to communicate with the first part of a time slot; A device sends and/or receives side link information.
[Claim 20]
A communication system includes: a first device that performs side-link communication with a second device; and a second device that receives length information indicating the length of a first part of a time slot sent by a terminal device or a network device; and according to The length information and the first device send and/or receive side link information.