Method, device and communication system for acquiring timing advance of uplink transmission
Technical field
[0001]
The present invention relates to the field of communications, and in particular, to an uplink transmission timing advance acquisition method, device, and communication system.
Background technique
[0002]
Long Term Evolution (LTE) uses Timing Advance (TA) to maintain the orthogonality of uplink transmission and avoid intra-cell interference. As shown in FIG. 1, for User Equipment (UE), timing advance is a negative offset between the time when a downlink subframe is received and the time when an uplink subframe is transmitted. The base station offsets the different transmission delays of different UEs by appropriately controlling the offset degree of each UE, thereby ensuring that the uplink signals from different UEs arrive at the base station at substantially aligned times. Generally, the time required for uplink signals from different UEs to reach the base station falls within the Cyclic Prefix (CP).
[0003]
Specifically, the uplink synchronization granularity in LTE is 16 T s (≈5.2 μs), where T s =1/1/(15*10 3 *2048) seconds. After the UE synchronizes with the received downlink transmission for the first time, the initial timing advance is obtained through a random access process. The random access response (RAR) contains an 11-bit upstream timing advance command (TA command, Timing Advance command) to indicate the initial timing advance. UE received the timing advance command to the RAR T A (T A ∈ {0,1,2, ......, 1282}), then the timing advance amount T the TA = (N the TA + N TAoffset ) × T S , where, N the TA = T A × 16, N TAoffsetIt depends on a fixed value of the cell type and duplex type in the Timing Advance Group (TAG). A UE can be configured with multiple TAGs (such as mcg_PTAG, scg_PTAG, msg_STAG, scg_STAG, etc.), and the uplink transmission timing advance of cells within a TAG is the same. When the UE receives the timing advance command for a certain TAG, it uniformly adjusts the uplink timing of the cells in the TAG.
[0004]
After the initial uplink synchronization of the UE, the base station adjusts the uplink timing of the UE through a media access control layer control unit (MAC-CE for short). The structure of the MAC-CE used to carry the timing advance command is shown in FIG. 2, 2 bits are used to indicate the TAG (TAG ID), and 6 bits are the timing advance command for the TAG. MAC-CE UE received timing advance command is carried T A (T A ∈ {0,1,2, ......, 63 is}), then the timing advance amount T the TA = (N TA_new + N TAoffset ) × T S , where, N TA_new = N TA_old + (T a -31) × 16, N TA_old N prior to receiving the timing advance command TA value.
[0005]
It should be noted that the above introduction to the technical background is set forth only to facilitate a clear and complete description of the technical solutions of the present invention and to facilitate understanding by those skilled in the art. It cannot be considered that these technical solutions are known to those skilled in the art simply because these solutions are described in the background of the present invention.
[0006]
Summary of the invention
[0007]
The inventor found that in the New Radio (NR) system, multiple subcarrier widths (SCS) are supported, and the correspondence between each SCS and the uplink synchronization granularity (Unit) is shown in the following table:
[0008]
[表0001]
SCS granularity
15 16*64T c
30 8*64T c
60 4*64T c
120 2*64T c
[0009]
T c = 1/(64*30.72*10 6 ) seconds, the meaning of T c is the same as the existing standard, and its content is incorporated here.
[0010]
The formula is as follows:
[0011]
Unit ＝ 16 · 64 · T c / 2 μ， μ ＝ 0,1,2,3
[0012]
The correspondence between the value of μ and SCS is shown in the following table:
[0013]
[表0002]
m Δf＝2 μ·15[kHz]
0 15
1 30
2 60
3 120
[0014]
Among them, △f characterizes the value of SCS.
[0015]
Visible for MAC-CE in the TA command, due to the different SCS corresponding to different uplink synchronization granularity, including for the same timing advance command value (T A TA command value), i.e. the same information bit TA command as shown in FIG. 2, If the same T a value associated with a different SCS, the actual timing of various amounts indicated in advance. For example, in the timing advance TA command two command value (T A value) of the same, and the two T A are respectively associated with the values of the SCS and SCS 15kHz 30kHz and 15kHz are related to T A timing value indicative of the actual advance The amount of adjustment may be twice that of the latter.
[0016]
Thus, when a UE receives a TA command, the timing of the TA command when the UE is understood in advance command value (T A value) corresponding to the SCS to the TA command timing command value (T advance A value) of the corresponding one SCS Differently, the UE will not be able to obtain an accurate uplink transmission timing advance, thereby affecting the orthogonality of uplink transmission and increasing intra-cell interference.
[0017]
In order to solve the above problems, embodiments of the present invention provide a method, an apparatus, and a communication system for acquiring an uplink transmission timing advance, to help a UE obtain an accurate uplink transmission timing advance.
[0018]
According to a first aspect of embodiments of the present invention, there is provided a transmission method for obtaining a timing advance for uplink, wherein, said method comprising: a network device obtains timing advance command value (T A ), the T A and the terminal equipment It is related to the first reference subcarrier bandwidth (SCS) for calculating the timing advance (T TA ); the network device sends a timing advance command (TA command), and the timing advance command includes the timing advance command value.
[0019]
According to a second aspect of the embodiments of the present invention, a method for acquiring an uplink transmission timing advance is provided, wherein the method includes: a terminal device receives a timing advance command (TA command) and obtains the timing advance in the TA command command value (T a ); the terminal device determines the T a correlation for calculating the timing advance (T the TA ) a first reference subcarrier bandwidth (SCS).
[0020]
According to a third aspect of the present invention embodiment, there is provided an uplink transmission timing advance acquisition means, disposed at a network device, wherein the apparatus comprises: an acquisition unit that obtains a timing advance command value (T A ), the said T a terminal device for calculating a timing advance (T the TA ) a first reference subcarrier bandwidth (SCS) associated; transmitting unit that transmits a timing advance command (TA command), the timing of the timing advance command comprising Advance command value.
[0021]
According to a fourth aspect of the embodiments of the present invention, there is provided an uplink transmission timing advance acquisition device, configured in a terminal device, wherein the apparatus includes: a receiving unit that receives a timing advance command (TA command) to obtain said TA command in a timing advance command value (T a ); determining unit that determines the T a correlation for calculating the timing advance (T the TA ) a first reference subcarrier bandwidth (SCS).
[0022]
According to a fifth aspect of the embodiments of the present invention, there is provided a method for adjusting an upstream transmission timing advance, wherein the method includes: a terminal device receives a timing advance command (TA command), and the TA command includes a timing advance command value (T a ); the terminal device based on the T a uplink transmission timing of the determined adjustment; uplink transmission after the application of the terminal device after the adjustment timing of the first time point; wherein the first time point It is related to a second reference SCS, which is predefined or pre-configured; and/or, the first time point is related to an operating band of a serving cell of the terminal device.
[0023]
According to a sixth aspect of the embodiments of the present invention, there is provided an upstream transmission timing advance adjustment apparatus, wherein the apparatus includes: a receiving unit that receives a timing advance command (TA command), and the TA command includes timing advance command value (T a ); determining unit, based on which the T a uplink transmission after determining a timing adjustment; a processing unit, which application uplink transmission after a first time after the adjustment timing point, wherein the first A time point is related to a second reference SCS, which is predefined or pre-configured; and/or, the first time point is related to an operating band of a serving cell of the terminal device .
[0024]
According to a seventh aspect of the embodiments of the present invention, there is provided an uplink carrier bandwidth (BWP) activation method, wherein the method includes: a terminal device receives configuration information from a network device at an nth time unit, the configuration The information is used to indicate the activated upstream BWP to the terminal device; the terminal device uses the activated upstream BWP from the n+kth time unit; where n is a natural number, k is a positive integer, and k is greater than or equal to K , K is the number of time units between receiving the timing advance command and applying the uplink transmission timing adjusted based on the timing advance command, where the time units are symbols, time slots, sub-time slots, or sub-frames.
[0025]
According to an eighth aspect of an embodiment of the present invention, there is provided an apparatus for activating an uplink carrier bandwidth (BWP), wherein the apparatus includes: a receiving unit that receives configuration information from a network device at an nth time unit, so The configuration information is used to indicate the activated upstream BWP to the terminal device; the processing unit uses the activated upstream BWP from the n+kth time unit; where n is a natural number, k is a positive integer, and k is greater than or It is equal to K, and K is the number of time units between receiving the timing advance command and applying the uplink transmission timing adjusted based on the timing advance command, where the time units are symbols, time slots, sub-time slots, or sub-frames.
[0026]
According to a ninth aspect of the embodiments of the present invention, there is provided a network device, wherein the network device includes the apparatus according to the foregoing third aspect.
[0027]
According to a tenth aspect of the embodiments of the present invention, there is provided a terminal device, wherein the terminal device includes the apparatus according to the foregoing fourth aspect, sixth aspect, or eighth aspect.
[0028]
According to a seventh aspect of the embodiments of the present invention, there is provided a communication system including the network device described in the foregoing ninth aspect and the terminal device described in the foregoing tenth aspect.
[0029]
According to other aspects of embodiments of the present invention, there is provided a computer readable program, wherein when the program is executed in a network device, the program causes the computer to execute the method in the first aspect in the network device .
[0030]
According to other aspects of the embodiments of the present invention, there is provided a storage medium storing a computer-readable program, wherein the computer-readable program causes a computer to execute the method described in the first aspect in a network device.
[0031]
According to other aspects of the embodiments of the present invention, there is provided a computer readable program, wherein when the program is executed in a terminal device, the program causes the computer to execute the foregoing second aspect and fifth aspect in the user equipment Or the method described in the seventh aspect.
[0032]
According to other aspects of the embodiments of the present invention, there is provided a storage medium storing a computer-readable program, wherein the computer-readable program causes a computer to execute the foregoing second aspect, fifth aspect, or seventh aspect in a user equipment The method described.
[0033]
Advantageous effects of the embodiments of the present invention, wherein: the timing advance command sent by the network device (TA command) in the timing advance command value (T A ) and the terminal device for calculating a timing advance (T the TA ) with reference to the SCS (referred to as SCS) correlation, thus, it can help the UE to obtain accurate uplink transmission timing advance.
[0034]
With reference to the following description and drawings, specific embodiments of the present invention are disclosed in detail, and the manner in which the principles of the present invention can be adopted is indicated. It should be understood that the embodiments of the present invention are not thus limited in scope. Within the scope of the spirit and terms of the appended claims, the embodiments of the present invention include many changes, modifications, and equivalents.
[0035]
Features described and/or illustrated for one embodiment may 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 .
[0036]
It should be emphasized that the term "comprising/comprising" as used herein refers to the presence of features, whole pieces, steps or components, but does not exclude the presence or addition of one or more other features, whole pieces, steps or components.
BRIEF DESCRIPTION
[0037]
Elements and features described in one drawing or one embodiment of the embodiments of the present invention may be combined with elements and features shown in one or more other drawings or embodiments. 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.
[0038]
The included drawings are used to provide a further understanding of the embodiments of the present invention, which form a part of the description, are used to illustrate the embodiments of the present invention, and together with the textual descriptions explain the principles of the present invention. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without paying any creative labor, other drawings can be obtained based on these drawings. In the drawings:
[0039]
Figure 1 is a schematic diagram of the concept of timing advance;
[0040]
2 is a schematic diagram of the format of MAC-CE;
[0041]
3 is a schematic diagram of a communication system according to an embodiment of the present invention;
[0042]
FIG. 4 is a schematic diagram of a scene including multiple UL BWPs in a TGA;
[0043]
5 is a schematic diagram of a method for acquiring an uplink transmission timing advance in Embodiment 1;
[0044]
6 is a schematic diagram of the effective time of TA command;
[0045]
7 is a schematic diagram of a method for acquiring an uplink transmission timing advance in Embodiment 2;
[0046]
8 is a schematic diagram of an apparatus for acquiring an uplink transmission timing advance in Embodiment 3;
[0047]
9 is a schematic diagram of an apparatus for acquiring an uplink transmission timing advance in Embodiment 4;
[0048]
10 is a schematic diagram of an implementation manner of the network device of Example 5;
[0049]
11 is a schematic diagram of an implementation manner of a terminal device of Example 6;
[0050]
12 is a schematic diagram of different symbol time lengths corresponding to different SCSs in an NR system;
[0051]
13 is a schematic diagram of a method for adjusting the uplink transmission timing advance of Embodiment 8;
[0052]
14 is a schematic diagram of an activation method of an uplink carrier bandwidth of Embodiment 9;
[0053]
15 is a schematic diagram of an apparatus for adjusting the uplink transmission timing advance of Embodiment 10
[0054]
16 is a schematic diagram of an apparatus for activating an uplink carrier bandwidth in Embodiment 11;
[0055]
17 is a schematic diagram of a terminal device of Embodiment 12.
detailed description
[0056]
The foregoing and other features of the present invention will become apparent from the following description with reference to the drawings. In the specification and the drawings, specific embodiments of the present invention are disclosed in detail, which show some of the 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. The invention includes all modifications, variations, and equivalents falling within the scope of the appended claims.
[0057]
In the embodiments of the present invention, the terms "first", "second", etc. are used to distinguish different elements in terms of titles, but do not mean the spatial arrangement or chronological order of these elements, and these elements should not be used by these terms Restricted. 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 presence of stated features, elements, elements or components, but do not exclude the presence or addition of one or more other features, elements, elements or components.
[0058]
In the embodiments of the present invention, the singular forms "a", "the", etc. include the plural forms, which should be broadly understood as "a" or "a class" and not limited to the meaning of "a"; in addition, the term " "Say" 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 indicates otherwise.
[0059]
In the embodiments of the present invention, the term "communication network" or "wireless communication network" may refer to a network that conforms to any of the following communication standards, such as Long Term Evolution (LTE, Long Term Evolution), Enhanced Long Term Evolution (LTE-A, LTE- Advanced), Wideband Code Division Multiple Access (WCDMA), High-Speed ​​Packet Access (HSPA), etc.
[0060]
In addition, the communication between devices in the communication system can be performed according to any stage of the communication protocol, for example, it can include but is not limited to the following communication protocols: 1G (generation), 2G, 2.5G, 2.75G, 3G, 4G, 4.5G and future 5G, New Radio (NR), etc., and/or other communication protocols currently known or to be developed in the future.
[0061]
In the embodiments of the present invention, the term "network device" refers to, for example, a device in a communication system that connects user equipment to a communication network and provides services for the user equipment. 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.
[0062]
Among them, the base station may include but is not limited to: Node B (NodeB or NB), evolved Node B (eNodeB or eNB) and 5G base station (gNB), etc., and may further include a remote radio head (RRH) , Remote Radio Unit (RRU, Remote Radio Unit), relay (relay) or low power node (such as femto, pico, etc.). And the term "base station" may include some or all of their functions, and each base station may 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.
[0063]
In the embodiments of the present invention, the term “User Equipment” (UE, User Equipment) refers to, for example, a device that accesses a communication network through a network device and receives network services, and may also be referred to as “Terminal Equipment” (TE, Terminal Equipment). 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, and so on.
[0064]
The terminal device may include, but is not limited to, the following devices: cellular phone (Cellular Phone), personal digital assistant (PDA, Personal Digital Assistant), wireless modem, wireless communication device, handheld device, machine type communication device, laptop computer, Cordless phones, smart phones, smart watches, digital cameras, etc.
[0065]
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, a machine type communication (MTC, Machine Type Communication) terminal, In-vehicle communication terminal, device to device (D2D, Device to Device) terminal, machine to machine (M2M, Machine to Machine) terminal, etc.
[0066]
The following describes the scenario of the embodiment of the present invention by way of example, but the present invention is not limited to this.
[0067]
FIG. 3 is a schematic diagram of a communication system according to an embodiment of the present invention. The terminal device and the network device are taken as examples. As shown in FIG. 3, the communication system 300 may include: a network device 301 and a terminal device 302. For simplicity, FIG. 3 takes only one terminal device as an example for description. The network device 301 is, for example, the NR network device gNB.
[0068]
In the embodiment of the present invention, an existing service or a service that can be implemented in the future can be performed between the network device 301 and the terminal device 302. For example, these services include but are not limited to: enhanced mobile broadband (eMBB, enhanced Mobile Broadband), large-scale machine type communication (mMTC, massive machine type communication), and highly reliable low-latency communication (URLLC, Ultra-Reliable and Low- Latency Communication), etc.
[0069]
The terminal device 302 can send data to the network device 301, for example, using an unauthorized transmission method. The network device 301 can receive data sent by one or more terminal devices 302, and feed back information (eg, ACK/non-acknowledgement NACK) information to the terminal device 302. The terminal device 302 can confirm the end of the transmission process based on the feedback information, or can New data transmission is performed, or data retransmission can be performed.
[0070]
In the NR system, the concept of carrier bandwidth (bandwidth part, BWP) is introduced. A downlink (DL)/uplink (UL) bandwidth contains multiple BWPs. Each UE may be semi-statically configured with one or more DL/UL BWPs, and activate to use one or more DL/UL BWPs at the same time to receive/transmit uplink and downlink data. The SCS and other parameters supported by each BWP are configured independently of each other.
[0071]
Generally, one TAG includes at least one cell, and one cell supports at least one uplink component carrier (UL CC), for example, including supplementary UL (Supplementary UL, SUL) and non-supplemental UL, and one UL CC may semi-statically configure at least one UL BWP. FIG. 4 shows a schematic diagram of a scenario where one TAG includes one or more UL BWPs in a semi-static configuration.
[0072]
In the embodiment of the present invention, after receiving the TA command for a certain TAG, the UE may calculate the timing advance according to a certain reference SCS and its corresponding uplink synchronization granularity. If the reference SCS on the UE side is determined by a pre-defined rule, since the UL BWP configuration may change after receiving the TA command, the reference SCS on the UE side may also change (increase or decrease).
[0073]
For example, if the reference SCS on the UE side is the SCS determined according to the predefined rules of the UL BWP semi-statically configured in the TAG, such as the maximum or minimum SCS, and after the UE receives the TA command, the base station uses control signaling (such as RRC signaling) Command, etc.) instructs the UE to update the UL BWP set in the semi-static configuration in the TAG, and accordingly, its reference SCS changes.
[0074]
Another example: if the reference SCS on the UE side is the SCS determined according to the predefined rules of the UL BWP activated in the TAG, such as the maximum or minimum SCS, and after the UE receives the TA command, the base station passes control signaling, such as RRC signaling (Such as Active-BWP-UL-SCell), MAC-CE, DCI (downlink control information) (such as DCI format 0_1), etc., instructs the UE to activate and/or deactivate UL BWP, and accordingly, its reference SCS changes. Or, after receiving the TA command, the UE activates and/or deactivates the UL BWP based on a timer, and accordingly, its reference SCS changes. The value of the timer can be configured by the base station through RRC signaling (BWP-InactivityTimer).
[0075]
Various embodiments of the embodiments of the present invention will be described below with reference to the drawings. These embodiments are only exemplary and are not limitations of the present invention.
[0076]
Example 1
[0077]
An embodiment of the present invention provides an uplink transmission timing advance acquisition method. The method is applied to network equipment, such as gNB (base station in NR), etc. FIG. 5 is an embodiment of the present invention. Please refer to Figure 5 for a schematic diagram of the method. The method includes:
[0078]
Step 501: the network device obtains timing advance command value (T A ), the T A terminal device for calculating a timing advance (T the TA ) a first reference subcarrier bandwidth (SCS) associated;
[0079]
Step 502: The network device sends a timing advance command (TA command), and the timing advance command includes the timing advance command value.
[0080]
In the present embodiment, since the timing advance command sent by the network device a value (T A ) and the terminal device for calculating a timing advance (T the TA reference SCS) were, ensures that the terminal device and the reference SCS understanding network device The understanding of the reference SCS on the terminal device side is consistent, thereby helping the terminal device to obtain an accurate uplink transmission timing advance.
[0081]
In one embodiment, the first reference SCS used to calculate T TA related to the above T A is predefined or pre-configured. It may be the reference SCS on the terminal device side when the above TA command takes effect, or it may be the reference SCS on the terminal device side when the network device sends the above TA command or the terminal device receives the above TA command. In this embodiment, the reference SCS on the terminal device side may be the maximum or minimum SCS of the semi-statically configured UL BWP in the TAG corresponding to the TA command, or the maximum or maximum UL BWP activated in the TAG corresponding to the TA command. Minimum SCS.
[0082]
In this embodiment, if the terminal device receives the TA command at time t, and the TA command takes effect after a certain time interval (for example, time t+T), time t+T is called the effective time of the TA command, that is, the terminal device At time t+T, the uplink transmission timing advance based on the TA command update is used for uplink transmission. For example, if the terminal device receives the TA command in the nth time unit, the TA command takes effect in the n+N (N>0, for example, N=6) time unit, that is, the terminal device starts from the n+N time The unit begins to use the upstream transmission timing advance (upstream transmission timing adjustment amount) obtained based on the TA command for upstream transmission. Here, the time unit may be a symbol, slot, sub-slot, or sub-frame. Among them, a slot (slot) includes 14 symbols, and a subslot (subslot) includes less than 14 symbols.
[0083]
In this embodiment, in order to ensure that the network device side and the terminal device side have the same understanding of the reference SCS on the terminal device side when the TA command takes effect, from the network device instruction BWP configuration (t1) to the terminal device updating the BWP configuration according to the instruction ( The time interval of t3) Gap A (t3-t1) may be greater than the time interval of Gap B (t4-t2) from the time when the network device sends a TA command (t2) to when the TA command takes effect (t4), as shown in FIG. 6.
[0084]
In another embodiment, the first reference SCS used to calculate T TA related to the above T A is specified by the network device. In the present embodiment, the network device may instruct the terminal device to the terminal device transmits the control signaling via a control signaling specifying the above T A correlation for calculating T the TA reference SCS. The control signaling here is, for example: Radio Resource Control (Radio Resource Control, RRC) signaling, MAC-CE, Downlink Control Information (Downlink Control Information, DCI), etc. This embodiment is not limited thereto. In addition, the RRC signaling is, for example, Active-BWP-UL-SCell, the MAC-CE is, for example, TA command MAC-CE, and the DCI is, for example, DCI format 0_1.
[0085]
In yet another embodiment, the foregoing two embodiments can be used in combination. For example, if the network device does not instruct the terminal apparatus via the control signaling specifying the above T A correlation for calculating T the TA reference SCS, the terminal device may determine the reference SCS according to some predefined rules for calculating the above-described timing advance ; If the network device instructs the terminal apparatus via the control signaling specifying the above T a correlation for calculating T the TA reference SCS, the terminal device is calculated according to the designated reference SCS timing advance.
[0086]
By the method of this embodiment, the network device to the terminal device for calculating a timing advance (T the TA with reference to the timing associated SCS) advance command value (T A ) sent by the TA command, the terminal device can be guaranteed for its calculated T TA reference SCS understanding and apparatus for a network computing device-side terminal T of the TA consistent understanding of the reference SCS, the terminal device to help accurate uplink transmission timing advance.
[0087]
Example 2
[0088]
An embodiment of the present invention provides a method for acquiring an upstream transmission timing advance. The method is applied to a terminal device, which is a process on the terminal device side corresponding to the method of Embodiment 1, wherein the same content as Embodiment 1 is not repeated Instructions. FIG. 7 is a schematic diagram of a method for acquiring an uplink transmission timing advance according to an embodiment of the present invention. Referring to FIG. 7, the method includes:
[0089]
Step 701: The terminal device receives a timing advance command (TA command), to obtain a TA command in a timing advance command value (T A );
[0090]
Step 702: The terminal device determines the T A correlation for calculating the timing advance (T the TA ) a first reference subcarrier bandwidth (SCS).
[0091]
In one embodiment of the present embodiment, as described in Example 1, above T A correlation for calculating a timing advance (T the TA first reference subcarrier bandwidth (the SCS)) is predefined or preconfigured of. For example, the reference SCS on the terminal device side when the above TA command is in effect, and for example, the reference SCS on the terminal device side when the network device sends the above TA command or the terminal device receives the above TA command. Here, the reference SCS on the terminal device side may be the maximum or minimum SCS of the semi-statically configured uplink carrier bandwidth (UL BWP) in the timing advance group (TAG) corresponding to the above TA command; or, it may be activated in the TAG corresponding to the above TA command The maximum or minimum SCS of UL BWP.
[0092]
In another embodiment of the present embodiment, as described in Example 1, above T A correlation for calculating the timing advance (T the TA ) a first reference subcarrier bandwidth (SCS) is a specified network device. In the present embodiment, the terminal device may receive the control signaling sent by the network, indicating the control signaling with the network device specified above T A correlation for calculating the timing advance (T the TA first reference SCS) of.
[0093]
In the present embodiment, the terminal device may be based on the above-described T A T for calculating a correlation TA first reference SCS calculated timing advance (T TA ). Optionally, the terminal device may also calculate or adjust the above-mentioned timing advance (T TA ) based on the reference SCS on the terminal device side corresponding to the uplink transmission time (or time unit ). Here, the time unit may be a symbol, a time slot, a sub-slot, or a sub-frame, where one slot (slot) includes 14 symbols and one sub-slot (subslot) includes less than 14 symbols. In addition, the meaning of the reference SCS on the terminal device side is the same as described above, and the description is omitted here.
[0094]
The method for calculating the timing advance (T TA ) of the terminal device will be described below by way of example . In the following example, the network device is gNB and the terminal device is UE.
[0095]
Suppose that the value of the TA command received by the UE at time t (or nth time unit) is T A (for example, T A ∈{0,1,2,......,63}), and the TA command Effective at time t+T (or n+Nth time unit).
[0096]
If the uplink synchronization granularity corresponding to the reference SCS (such as SCS_0) at the time t (or nth time unit) on the UE side is Unit t = 16·64·T c /2 μ0 , time t+T (or n+N The reference SCS (such as SCS_1) corresponds to the uplink synchronization granularity of Unit t+T = 16·64·T c /2 μ1 , which is some time after time t+T (or n+Nth time unit) The upstream synchronization granularity corresponding to the reference SCS (such as SCS_2) of the upstream transmission time (or time unit) is Unit t+T+? =16·64·T c /2 μ2 . The gNB specifies and informs the UE that the uplink synchronization granularity corresponding to a certain SCS (eg SCS_3) is Unit gNB_selected =16·64·T c /2 μ3 . In the above assumptions, the values ​​of SCS_0, SCS_1, SCS_2, and SCS_3 may be the same or different, and accordingly, μ 0 , μ 1 , μ 2 , μ 3The value of can also be the same or different.
[0097]
In one embodiment, as described above, the UE can be based on the above-described T A correlation for calculating T the TA calculated timing advance (T first reference SCS of the TA ).
[0098]
In the present embodiment, UE calculates a timing advance (T the TA ) with the reference SCS timing advance command value (T A ) related to the first reference SCS, UE according to the timing advance command value (T A ) associated The first reference SCS determines the corresponding uplink synchronization granularity and calculates the timing advance (T TA ).
[0099]
If the timing advance command value (T A time) associated with a first reference SCS is predefined or pre-configured, and the UE transmits or receives the TA command TA command to GNB UE side reference SCS (SCS_0), the UE based on the time t The timing advance (T TA ) calculated by TA command (T A ) calculated by TA command (or n-th time unit ) is:
[0100]
T TA＝ (N TA_new + N TA, offset ) × T c
[0101]
among them,
[0102]
[Number 0001]

[0103]
If the timing advance command value (T A ) associated with a first reference SCS is predefined or pre-configured, and when the TA command for the entry into force of the reference SCS UE side (SCS_1), the UE according to the time t (or n th time units) Command the TA (T a ) calculating an updated timing advance (T the TA ) is:
[0104]
T TA＝ (N TA_new + N TA, offset ) × T c
[0105]
among them,
[0106]
[Number 0002]

[0107]
If the timing advance command value (T A ) associated with a first base station designated as the reference SCS and inform the UE SCS (SCS_3), the UE according to the time t (or n-th time unit) Command of the TA (T A ) calculated The updated timing advance (T TA ) is:
[0108]
T TA＝ (N TA_new + N TA, offset ) × T c
[0109]
among them,
[0110]
[Number 0003]

[0111]
In the above formula, the value of N TA, offset is determined according to the TAG type corresponding to the TA command, the duplex mode (FDD or TDD), frequency range (FR), etc. when upstream transmission occurs .
[0112]
E.g:
[0113]
If the relationship between the value of N TA, offset and the TAG type is considered, then:
[0114]
If the primary cell and/or primary and secondary cell (PCell/PSCell) is included in the TAG, or the PCell/PSCell is not included in the TAG but the serving cell therein has the same duplex mode, N TA, offset is 0;
[0115]
If the PCell/PSCell is not included in the TAG and the serving cell therein has a different duplex mode, the value of N TA and offset is related to the frequency domain range. For example, as shown in the table below:
[0116]
[表0003]
Frequency Range N TA_offset
FR1(<6GHz) 25560
FR2(>6GHz) 13763
[0117]
Another example:
[0118]
If only the relationship between the value of N TA, offset and the duplex mode and frequency range is considered, the value of N TA, offset is , for example, shown in the following table:
[0119]

[0120]
In this example, the duplex mode of the serving cell in the same TAG is required to be the same.
[0121]
In this embodiment, even if the reference SCS changes after time t+T (or n+Nth time unit), after the TA command takes effect (time t+T), and before the next TA command is received, The UE maintains N TA unchanged. Before the next TA command takes effect, the UE still uses the above-mentioned timing advance (T TA ).
[0122]
In another embodiment, as described above, the UE may calculate or adjust the above-mentioned timing advance (T TA ) based on the reference SCS on the UE side corresponding to the uplink transmission time .
[0123]
In this embodiment, the reference SCS for calculating or adjusting the timing advance (T TA ) of the UE is the reference SCS corresponding to the uplink transmission time, and the corresponding uplink synchronization granularity is determined according to the reference SCS corresponding to the uplink transmission time, and the timing advance is calculated or adjusted ( T TA ).
[0124]
If the timing advance command value (T A ) for the associated first reference SCS SCS_0, the UE according to the time t (or n-th time unit) Command of the TA (T A ) an updated timing advance (T calculated by the TA ) for:
[0125]
T TA＝ (N TA_new + N TA, offset ) × T c
[0126]
among them,
[0127]
[Number 0004]

[0128]
among them,
[0129]
(Round up)
[0130]
or,
[0131]
(Round down)
[0132]
If the timing advance command value (T A ) for the associated first reference SCS SCS_1, the UE according to the time t (or n-th time unit) Command of the TA (T A ) an updated timing advance (T calculated by the TA ) for:
[0133]
T TA＝ (N TA_new + N TA, offset ) × T c
[0134]
among them,
[0135]
[Number 0005]

[0136]
among them,
[0137]
(Round up)
[0138]
or,
[0139]
(Round down)
[0140]
If the timing advance command value (T A ) for the associated first reference SCS SCS_3, the UE according to the time t (or n-th time unit) Command of the TA (T A ) an updated timing advance (T calculated by the TA ) for:
[0141]
T TA＝ (N TA_new + N TA, offset ) × T c
[0142]
among them,
[0143]
[Number 0006]

[0144]
among them,
[0145]
(Round up)
[0146]
or,
[0147]
(Round down)
[0148]
In this embodiment, after the TA command becomes effective (time t+T) and before the next TA command is received and becomes effective, the value of μ 2 changes with the change of the reference SCS corresponding to the uplink transmission time of the UE.
[0149]
In the foregoing two embodiments, to the terminal device based on the above-described T A correlation for calculating T the TA first reference SCS calculated timing advance (T the TA ) has been described as an example, i.e., the terminal device directly determines the adjustment After the timing advance, the upstream transmission timing is determined, but this embodiment is not limited to this. The terminal device may also first determine the relative adjustment relative to the current timing advance, then determine the upstream transmission timing, and determine the relative adjustment For the method, please refer to the foregoing implementation mode, which will not be repeated here.
[0150]
With the method of this embodiment, when the UL BWP of the uplink transmission of the terminal device changes, the network device and the terminal device can uniquely determine the timing advance after the UL BWP changes, and the network device can further adjust the control signaling according to the reference value The upstream timing of the terminal equipment.
[0151]
Example 3
[0152]
An embodiment of the present invention provides an apparatus for acquiring an uplink transmission timing advance. The apparatus can be configured in a network device, such as gNB (base station in NR). Since the principle of the device to solve the problem is similar to the method of Embodiment 1, the specific implementation can refer to the implementation of the method of Embodiment 1, and the same content will not be repeated.
[0153]
FIG 8 is a timing diagram of an apparatus in advance of acquiring uplink transmission according to an embodiment of the present invention, Referring to FIG. 8, the uplink transmission timing advance acquisition apparatus 800 includes: an obtaining unit 801, obtains timing advance command value (T A ) the T a terminal device for calculating a timing advance (T the TA ) a first reference subcarrier bandwidth (SCS) associated; a first transmitting unit 802, which transmits timing advance command (TA command), the timing advance The command contains the timing advance command value.
[0154]
An embodiment in the present embodiment, the T A correlation for calculating T the TA first reference SCS is predefined or preconfigured. For example, it may be: the reference SCS on the terminal device side when the TA command takes effect. For another example, the reference SCS on the terminal device side when the network device sends the TA command or the terminal device receives the TA command.
[0155]
In this embodiment, the reference SCS on the terminal device side is the maximum or minimum SCS of the semi-statically configured uplink carrier bandwidth (UL BWP) in the timing advance group (TAG) corresponding to the TA command; or, the terminal The reference SCS on the device side is the maximum or minimum SCS of the UL BWP activated in the TAG corresponding to the TA command.
[0156]
In one embodiment of the present embodiment, the T A correlation for calculating T the TA first reference SCS to the network device designated SCS.
[0157]
In this embodiment, as shown in FIG. 8, the device 800 may further include:
[0158]
The second sending unit 803, to the terminal device which transmits the control signaling, the control signaling by the terminal equipment with said designated T A relevant T for calculating the TA first reference SCS's.
[0159]
By means of the embodiment according to the present embodiment, the network device to the terminal device for calculating a timing advance (T the TA with reference to the timing associated SCS) advance command value (T A ) sent by the TA command, the terminal device can be guaranteed for its calculated T TA reference SCS understanding and apparatus for a network computing device-side terminal T of the TA consistent understanding of the reference SCS, the terminal device to help accurate uplink transmission timing advance.
[0160]
Example 4
[0161]
An embodiment of the present invention provides an apparatus for acquiring uplink transmission timing advance. The apparatus may be configured in user equipment. Since the principle of the device to solve the problem is similar to the method of Embodiment 2, the specific implementation can refer to the implementation of the method of Embodiment 2, and the same content will not be repeated.
[0162]
9 is a schematic diagram of an apparatus for acquiring an uplink transmission timing advance according to an embodiment of the present invention. Referring to FIG. 9, the apparatus 900 for acquiring an uplink transmission timing advance includes: a first receiving unit 901 that receives a timing advance command (TA command ), to obtain a TA command in a timing advance command value (T a ); determining unit 902 that determines the T a correlation for calculating the timing advance (T the TA ) a first reference subcarrier bandwidth (SCS ).
[0163]
An embodiment in the present embodiment, the T A correlation for calculating the timing advance (T the TA ) a first reference subcarrier bandwidth (SCS) is a predefined or preconfigured. For example, it may be: the reference SCS on the terminal device side when the TA command takes effect. For another example, the reference SCS on the terminal device side when the network device sends the TA command or the terminal device receives the TA command.
[0164]
In another embodiment of the present embodiment, the T A correlation for calculating T the TA first reference SCS to the network device designated SCS.
[0165]
In this embodiment, as shown in FIG. 9, the device 900 may further include:
[0166]
The second receiving unit 903, which receives a control signaling sent by the network, the control signaling indicates that the network device with the specified T A for calculating a timing advance (T associated TA first by reference) Subcarrier bandwidth (SCS).
[0167]
In an implementation of this embodiment, as shown in FIG. 9, the device 900 may further include:
[0168]
Calculation unit 904, based on the T A is calculated for the related T TA first reference SCS calculated timing advance (T TA ).
[0169]
In this embodiment, the calculation unit 904 may also calculate or adjust the timing advance (T TA ) based on the reference SCS on the terminal device side corresponding to the uplink transmission time .
[0170]
In this embodiment, the reference SCS on the terminal device side is the maximum or minimum SCS of the semi-statically configured uplink carrier bandwidth (UL BWP) in the timing advance group (TAG) corresponding to the TA command; or, the terminal The reference SCS on the device side is the maximum or minimum SCS of the UL BWP activated in the TAG corresponding to the TA command.
[0171]
With the apparatus of this embodiment, when the UL BWP of the uplink transmission of the terminal device changes, the network device and the terminal device can uniquely determine the timing advance after the UL BWP changes, and the network device can further adjust through control signaling according to the reference value The upstream timing of the terminal equipment.
[0172]
Example 5
[0173]
An embodiment of the present invention provides a network device, such as gNB (base station in NR), etc., where the network device includes the apparatus for acquiring the uplink transmission timing advance described in Embodiment 3.
[0174]
10 is a schematic diagram of a network device according to an embodiment of the present invention. As shown in FIG. 10, the network device 1000 may include: a central processing unit (CPU) 1001 and a memory 1002; the memory 1002 is coupled to the central processing unit 1001. The memory 1002 can store various data; in addition, it stores an information processing program, and executes the program under the control of the central processor 1001 to receive various information sent by the terminal device and send various information to the terminal device.
[0175]
In one embodiment, the function of the apparatus for acquiring the uplink transmission timing advance described in Example 3 can be integrated into the central processor 1001, and the central processor 1001 implements the uplink transmission timing advance described in Embodiment 3. The function of the acquiring device, wherein the function of the acquiring device regarding the uplink transmission timing advance is incorporated here, and will not be repeated here.
[0176]
In another embodiment, the apparatus for acquiring the upstream transmission timing advance of Example 3 may be configured separately from the central processor 1001. For example, the apparatus for acquiring the upstream transmission timing advance may be configured as a chip connected to the central processor 1001 Through the control of the central processor 1001, the function of the upstream transmission timing advance acquisition device is realized.
[0177]
In addition, as shown in FIG. 10, the network device 1000 may further include: a transceiver 1003, an antenna 1004, and the like; wherein, the functions of the above components are similar to those in the prior art, and will not be repeated here. It is worth noting that the network device 1000 does not necessarily include all the components shown in FIG. 10; in addition, the network device 1000 may also include components not shown in FIG. 10, and reference may be made to the prior art.
[0178]
By the network device according to the present embodiment, the network device to the terminal device for calculating a timing advance (T the TA with reference to the timing associated SCS) advance command value (T A ) sent by the TA command, the terminal device can ensure its use a computing T TA equipment side terminal T for calculating a reference SCS appreciated that the network device TA consistent reference SCS understanding, the terminal device to help accurate uplink transmission timing advance.
[0179]
Example 6
[0180]
An embodiment of the present invention provides a terminal device, wherein the terminal device includes the uplink transmission timing advance acquisition device described in Embodiment 4.
[0181]
FIG. 11 is a schematic diagram of a terminal device according to an embodiment of the present invention. As shown in FIG. 11, the terminal device 1100 may include a central processor 1101 and a memory 1102; the memory 1102 is coupled to the central processor 1101. It is worth noting that the figure is exemplary; other types of structures can also be used to supplement or replace the structure to implement telecommunications functions or other functions.
[0182]
In one embodiment, the function of the apparatus for acquiring uplink transmission timing advance of Example 4 can be integrated into the central processor 1101, and the apparatus for acquiring uplink transmission timing advance described in Embodiment 4 can be implemented by the central processor 1101. The function of the device for acquiring the timing advance of the uplink transmission is incorporated here, and will not be repeated here.
[0183]
In another embodiment, the apparatus for acquiring the upstream transmission timing advance of Example 4 may be configured separately from the central processor 1101. For example, the apparatus for acquiring the upstream transmission timing advance may be configured as a chip connected to the central processor 1101 Through the control of the central processor 1101, the function of the upstream transmission timing advance acquisition device is realized.
[0184]
As shown in FIG. 11, the terminal device 1100 may further include: a communication module 1103, an input unit 1104, an audio processing unit 1105, a display 1106, and a power supply 1107. It is worth noting that the terminal device 1100 does not necessarily include all components shown in FIG. 11; in addition, the terminal device 1100 may also include components not shown in FIG. 11, and reference may be made to the prior art.
[0185]
As shown in FIG. 11, the central processor 1101 is sometimes referred to as a controller or operation control, and may include a microprocessor or other processor devices and/or logic devices. The central processor 1101 receives input and controls each of the terminal devices 1100 Operation of components.
[0186]
The memory 1102 may be, for example, one or more of a buffer, flash memory, hard drive, removable medium, volatile memory, non-volatile memory, or other suitable devices. It can store information related to configuration, and can also store programs to execute related information. In addition, the central processor 1101 can execute the program stored in the memory 1102 to implement information storage or processing. The functions of other components are similar to the existing ones and will not be repeated here. Each component of the terminal device 1100 may be implemented by dedicated hardware, firmware, software, or a combination thereof, without departing from the scope of the present invention.
[0187]
With the terminal device of this embodiment, when the UL BWP used by the terminal device for uplink transmission changes, the network device and the terminal device can uniquely determine the timing advance after the UL BWP changes, and the network device can further pass the control based on the reference value Signaling adjusts the upstream timing of the terminal equipment.
[0188]
Example 7
[0189]
An embodiment of the present invention provides a communication system including a network device and a terminal device. The network device is, for example, the network device 1000 described in Embodiment 5, and the terminal device is, for example, the terminal device 1100 described in Embodiment 6.
[0190]
In this embodiment, the network device may be, for example, gNB in ​​NR, which includes the conventional composition and functions of the network device in addition to the function of the acquisition device of the uplink transmission timing advance described in Embodiment 3, as implemented It is described in Example 5 and will not be repeated here.
[0191]
In this embodiment, the terminal device is, for example, a UE served by gNB, which includes the conventional composition and functions of the terminal device in addition to the function of the acquiring apparatus of the uplink transmission timing advance described in Embodiment 4, as in the embodiment It is described in 6, and will not be repeated here.
[0192]
Through the communication system of this embodiment, the normal transmission of data is ensured.
[0193]
Example 8
[0194]
In the LTE system, the terminal device receives the TA command in the nth subframe (subframe), and then uses the timing advance adjusted according to the TA command for uplink transmission starting from the n+6th subframe (subframe). However, in the NR system, a slot is defined to include 14 symbols, and a subslot (subslot) includes less than 14 symbols. In addition, the NR system supports multiple SCSs. The symbol time lengths corresponding to different SCSs are different. Correspondingly, the time lengths of slots corresponding to different SCSs or subslots containing the same number of symbols are also different. FIG. 12 shows different symbol time lengths corresponding to different SCSs in the NR system, where the absolute time length of the time slot corresponding to 15 kHz is 1 ms. If the time interval between the terminal device receiving the TA command and starting to apply the uplink transmission timing calculated or adjusted based on the TA command to perform uplink transmission is defined as the number of time slots, sub-time slots, or symbols, the terminal device will receive a After the TA command, it may not be possible to know a certain point in time when the adjusted timing advance is used for uplink transmission.
[0195]
An embodiment of the present invention provides an uplink transmission timing advance adjustment method, which is applied to a terminal device. FIG. 13 is a schematic diagram of the method for adjusting the uplink transmission timing advance of this embodiment. As shown in FIG. 13, the method includes:
[0196]
Step 1301: The terminal device receives timing advance command (TA command), the timing advance TA command comprises a command value (T A );
[0197]
Step 1302: the terminal device based on the T A uplink transmission timing of the determined adjustment;
[0198]
Step 1303: The terminal device applies the adjusted uplink transmission timing after the first time point.
[0199]
In this embodiment, the execution order of each step is not limited. For example, step 1302 and step 1303 may occur simultaneously, or step 1302 may also occur before step 1303.
[0200]
In the present embodiment, the timing advance command value (T A ) may also be referred to as TA adjustment parameters, the detailed meanings as described in Example 1, will not be repeated here.
[0201]
In this embodiment, the terminal device can directly determine the adjusted timing advance, and then determine the uplink transmission timing; the terminal device can also determine the relative adjustment amount relative to the current timing advance, and thus determine the uplink transmission timing. There are no restrictions.
[0202]
In this embodiment, the first time point is the leading edge of the first time unit to which the adjusted uplink transmission timing is applied.
[0203]
In an implementation manner of this embodiment, the position at the first time point may be related to the second reference SCS of the terminal device.
[0204]
In this embodiment, the position of the first time point and the second reference SCS may be related in one or more of the following aspects.
[0205]
Suppose that the terminal device receives the TA command at the nth time unit, and the terminal device starts to apply the adjusted uplink transmission timing for the uplink transmission at the n+N time unit. Wherein, n is a natural number, and N is a positive integer (for example, N=5, 6, 8, 16, 18, 20, etc.). If the time unit is a time slot or a sub-slot, the position of the first time point is the leading edge of the n+N time unit based on the second reference SCS. As shown in FIG. 12, at this time, the lengths of time units corresponding to different SCSs are different, so the positions of the first time point obtained based on different values ​​of the second reference SCS are different.
[0206]
Or, the interval between the time unit corresponding to different SCSs, when the terminal device receives the TA command, and the time unit when the uplink transmission timing adjusted based on the TA command is applied for uplink transmission is different. For example, for the 15kHz SCS, the terminal device receives the TA command at the nth time unit, and the terminal device starts to apply the adjusted upstream transmission timing for the n+N1 time unit for uplink transmission; for the 30kHz SCS, the terminal device When the TA command is received in the nth time unit, the terminal device starts to apply the adjusted uplink transmission timing for the uplink transmission at the n+N2 time unit. Among them, N1 is not equal to N2.
[0207]
Or, the interval between the terminal equipment corresponding to different SCSs and the time when the terminal device receives the TA command to start applying the uplink transmission timing adjusted based on the TA command to perform uplink transmission is different. For example, for the 15kHz SCS, the terminal device receives the TA command at the nth subframe, and the terminal device starts to apply the adjusted upstream transmission timing for the n+N1 subframe. For the 30kHz SCS, the terminal device is at the nth Each slot receives the TA command, and the terminal equipment starts to apply the adjusted uplink transmission timing for the n+N2 slot to perform uplink transmission. Among them, N1 is equal to or not equal to N2.
[0208]
In an example, the above-mentioned second reference SCS may be pre-defined or pre-configured, and the pre-defined means that the second reference SCS is a terminal device preset before delivery from the factory, and the second reference SCS is specifically pre-defined or pre-configured The method is the same as the method of pre-defining or pre-configuring the first reference SCS, which will not be repeated here. In this embodiment, the second reference SCS may be the same as or different from the first reference SCS, and the two may be independent of each other. As described in Embodiment 1, the first reference SCS calculates the timing for the terminal device Reference SCS for advance (T TA ).
[0209]
In another example, the above-mentioned second reference SCS may also be indicated by the first configuration information. In this embodiment, the terminal device may also receive first configuration information sent by the network device, where the first configuration information is used to indicate the above-mentioned second reference SCS or used by the terminal device to obtain the second reference SCS.
[0210]
In this embodiment, when the first configuration information is used to indicate the second reference SCS, the first configuration information may be carried in at least one of the following information or signaling: physical layer control channel, MAC signaling, RRC Signaling, system information or broadcast information. For the definition or implementation of these signaling, reference may be made to existing standards.
[0211]
In this embodiment, when the first configuration information is used by the terminal device to obtain the second reference SCS, the first configuration information may also be used to indicate to the terminal device the activated uplink carrier bandwidth (BWP), the second The reference SCS is the SCS of the activated upstream BWP (UL BWP).
[0212]
In another implementation manner of this embodiment, the position at the first time point may also be related to the operating band of the serving cell of the terminal device, or at the same time related to the foregoing second reference SCS and the operating band of the serving cell .
[0213]
For example: when the working frequency band of the serving cell (called band 1) is higher than 6 GHz, the position at the first time point may be the front edge of the n+N1 time unit based on a certain SCS (such as SCS_4); when the serving cell When the operating frequency band (called band 2) is lower than 6 GHz, the position at the first time point may be the leading edge of the n+N2 time unit based on a certain SCS (such as SCS_5). In this example, SCS_4 and SCS_5 may be the same or different, and N1 is not equal to N2. That is, in this example, the position at the first time point is only related to the operating band of the serving cell of the terminal device.
[0214]
For another example: when the operating frequency band of the serving cell is higher than 6 GHz, the position of the first time point may be the front edge of the n+N1th time unit; when the operating frequency band of the serving cell is lower than 6 GHz, the first time point The position may be the leading edge of the n+N2th time unit, and the index of the time unit is related to the second reference SCS determined by a predefined rule. That is, in this example, the position at the first time point is simultaneously related to the aforementioned second reference SCS and the operating frequency band of the serving cell.
[0215]
In this embodiment, when the first reference SCS or the second reference SCS is the maximum or minimum SCS in the UL BWP activated in the TAG corresponding to the TA command, since the first reference SCS or the second reference SCS will follow the UL BWP The activation/deactivation changes, and it is necessary to coordinate the relative position of the first time point when the TA command becomes effective and the second time point when the UL BWP activation instruction becomes effective.
[0216]
In an implementation manner of this embodiment, the terminal device may also receive second configuration information sent by the network device, where the second configuration information is used to indicate to the terminal device the activated uplink carrier bandwidth (UL BWP).
[0217]
In this embodiment and the foregoing embodiment in which the activated UL BWP is indicated by the first configuration information, the terminal device may use the activated UL BWP after the second time point, in which case, the second time point is on the time axis Same as the aforementioned first time point or after the aforementioned first time point. In addition, the terminal device may also use the activated UL BWP from the n+kth time unit, where n is the sequence number of the time unit in which the terminal device receives the second configuration information, and k is greater than or equal to the terminal device receiving the TA The sum of the time units after the command to the above first time point. Here, the time unit may be a symbol, a time slot, a sub-slot, or a sub-frame, and n and k are natural numbers.
[0218]
In this embodiment, the terminal device may receive the second configuration information before the first time point, and the second configuration information may be carried by physical layer control channel or MAC layer signaling or RRC layer signaling, but this The embodiment is not limited thereto.
[0219]
With the method of this embodiment, after receiving a TA command, the terminal device can learn a certain point in time when the adjusted timing advance is used for uplink transmission.
[0220]
Example 9
[0221]
In the foregoing embodiment, when the first reference SCS is the TA command associated with the TA command, the reference SCS on the UE side is effective, and the reference SCS on the UE side is the maximum or minimum SCS in the activated UL BWP. For the accuracy of the upstream timing advance, the network device may indicate the activated UL BWP before sending the TA command, so that the TA command effective time is aligned with the time when the UL BWP is activated.
[0222]
An embodiment of the present invention provides an uplink carrier bandwidth (BWP) activation method, which is applied to a terminal device. FIG. 14 is a schematic diagram of an uplink carrier bandwidth (BWP) activation method of this embodiment. As shown in FIG. 14, the method includes:
[0223]
Step 1401: The terminal device receives configuration information from the network device in the nth time unit, and the configuration information is used to indicate the activated UL BWP to the terminal device;
[0224]
Step 1402: The terminal device uses the activated UL BWP from the n+kth time unit, where n is a natural number, k is a positive integer, and k is greater than or equal to K (for example, K=5, 6, 8, 16 , 18, 20, etc.), the time unit is a symbol, time slot, sub-slot or sub-frame.
[0225]
Where K is the number of time units between receiving the timing advance command and applying the uplink transmission timing adjusted based on the timing advance command. That is, if the terminal device receives the TA command in the n-th time unit, the terminal device applies the uplink transmission timing adjusted based on the TA command in the n+K time unit.
[0226]
In this embodiment, the terminal device may receive a timing advance command (TA command) after the n-th time unit and before the n+k-th time unit.
[0227]
With the method of this embodiment, the effective time of the TA command can be aligned with the time when the UL BWP is activated.
[0228]
Example 10
[0229]
An embodiment of the present invention provides an upstream transmission timing advance adjustment device. The principle of the device to solve the problem is similar to the method of Embodiment 8. For a specific implementation, reference may be made to Embodiment 8. The description of the same content is not repeated.
[0230]
FIG. 15 is a schematic diagram of an apparatus for adjusting the uplink transmission timing advance of this embodiment. As shown in FIG. 15, the apparatus 1500 includes:
[0231]
Receiving unit 1501, which receives a timing advance command (TA command), the timing advance TA command comprises a command value (T A );
[0232]
Determining unit 1502, based on which the T A uplink transmission timing of the adjustment is determined; and
[0233]
The processing unit 1503 applies the adjusted uplink transmission timing after the first time point.
[0234]
In this embodiment, the first time point is related to the second reference SCS, in which aspect or specific aspects, as described in Embodiment 8, the description is omitted here; and/or, the first time point is related to The operating band of the serving cell of the terminal device is related.
[0235]
In this embodiment, the second reference SCS is the same as or different from the first reference SCS, and the first reference SCS calculates a timing advance (T TA ) reference SCS for the terminal device .
[0236]
In one embodiment, the second reference SCS is predefined or pre-configured, and the pre-defined means that the second reference SCS is preset in the terminal device before leaving the factory.
[0237]
In another embodiment, the second reference SCS is obtained according to the configuration of the network device. In this embodiment, the receiving unit 1501 may also receive first configuration information sent by a network device, where the first configuration information is used to indicate the second reference SCS, or used by the terminal device to obtain the second Refer to SCS.
[0238]
In this embodiment, when the first configuration information is used to indicate the second reference SCS, the first configuration information is carried in at least one of the following information or signaling: physical layer control channel, MAC signaling Order, RRC signaling, system information, or broadcast information.
[0239]
In this embodiment, when the first configuration information is used by the terminal device to obtain the second reference SCS, the first configuration information is also used to indicate to the terminal device an activated uplink carrier bandwidth (BWP ); the second reference SCS is the SCS of the activated UL BWP.
[0240]
In another implementation manner of this embodiment, the receiving unit 1501 may also receive second configuration information sent by the network device, where the second configuration information is used to indicate to the terminal device the activated uplink carrier bandwidth (BWP).
[0241]
In this embodiment, the processing unit 1503 may use the activated UL BWP after a second time point, where the second time point is the same as the first time point on the time axis or is located at the first time point after that.
[0242]
In this embodiment, the processing unit 1503 may also use the activated UL BWP from the n+kth time unit, where n is the serial number of the time unit where the terminal device receives the second configuration information, The k is greater than or equal to the sum of the time units after the terminal device receives the TA command and before the first time point, the time units are symbols, time slots, sub-time slots, or sub-frames, and the n And k are natural numbers.
[0243]
In this embodiment, the receiving unit 1501 may receive the second configuration information before the first time point. The second configuration information may be carried by physical layer control channel or MAC layer signaling or RRC layer signaling.
[0244]
With the apparatus of this embodiment, after receiving a TA command, the terminal device can learn a certain point in time when the adjusted timing advance is used for uplink transmission.
[0245]
Example 11
[0246]
An embodiment of the present invention provides an upstream carrier bandwidth (BWP) activation device. The principle of the device to solve the problem is similar to the method of Embodiment 9. For a specific implementation, reference may be made to Embodiment 9. The same content is not repeated. .
[0247]
FIG. 16 is a schematic diagram of an apparatus for activating an uplink carrier bandwidth (BWP) of this embodiment. As shown in FIG. 16, the apparatus 1600 includes:
[0248]
A receiving unit 1601, which receives configuration information from the network device in the nth time unit, the configuration information used to indicate the activated UL BWP to the terminal device; and
[0249]
Processing unit 1602, which uses the activated UL BWP from the n+kth time unit, where n is a natural number, k is a positive integer and k is greater than or equal to K, K is the timing advance command received to the application based on the timing The number of time units between the upstream transmission timing adjusted by the advance command. In addition, the time unit is a symbol, slot, sub-slot, or sub-frame.
[0250]
In this embodiment, the receiving unit 1601 may receive a timing advance command (TA command) after the nth time unit and before the n+kth time unit.
[0251]
With the method of this embodiment, the effective time of the TA command can be aligned with the time when the UL BWP is activated.
[0252]
Example 12
[0253]
An embodiment of the present invention provides a terminal device, where the terminal device includes the apparatus described in Embodiment 10 or 11.
[0254]
17 is a schematic diagram of a terminal device according to an embodiment of the present invention. As shown in FIG. 17, the terminal device 1700 may include a central processor 1701 and a memory 1702; the memory 1702 is coupled to the central processor 1701. It is worth noting that the figure is exemplary; other types of structures can also be used to supplement or replace the structure to implement telecommunications functions or other functions.
[0255]
In one embodiment, the function of the device described in Example 10 or 11 can be integrated into the central processor 1701, and the function of the device described in Example 10 or 11 can be implemented by the central processor 1701. The functions of the device described in or 11 are incorporated here and will not be repeated here.
[0256]
In another embodiment, the device described in Example 10 or 11 can be configured separately from the central processor 1701. For example, the device described in Example 10 or 11 can be configured as a chip connected to the central processor 1701. The control of the processor 1701 implements the functions of the device described in Embodiment 10 or 11.
[0257]
As shown in FIG. 17, the terminal device 1700 may further include: a communication module 1703, an input unit 1704, an audio processing unit 1705, a display 1706, and a power supply 1707. It is worth noting that the terminal device 1700 does not necessarily include all the components shown in FIG. 17; in addition, the terminal device 1700 may also include components not shown in FIG. 17, and reference may be made to the prior art.
[0258]
As shown in FIG. 17, the central processor 1701 is sometimes referred to as a controller or operation control, and may include a microprocessor or other processor devices and/or logic devices. The central processor 1701 receives input and controls each of the terminal devices 1700 Operation of components.
[0259]
The memory 1702 may be, for example, one or more of a buffer, flash memory, hard drive, removable medium, volatile memory, non-volatile memory, or other suitable devices. It can store information related to configuration, and can also store programs to execute related information. In addition, the central processor 1701 can execute the program stored in the memory 1702 to realize information storage or processing. The functions of other components are similar to the existing ones and will not be repeated here. Each component of the terminal device 1700 may be implemented by dedicated hardware, firmware, software, or a combination thereof, without departing from the scope of the present invention.
[0260]
With the terminal device of this embodiment, when the device described in Embodiment 10 is configured, after receiving a TA command, the terminal device can learn a certain point in time when the adjusted timing advance is used for uplink transmission. When the device described in Embodiment 11 is configured, the effective time of the TA command can be aligned with the time when the UL BWP is activated.
[0261]
Example 13
[0262]
An embodiment of the present invention provides a communication system. The communication system includes a network device and a terminal device. The network device is, for example, the network device 1000 described in Embodiment 5, and the terminal device is, for example, the terminal device 1100 described in Embodiment 12.
[0263]
In this embodiment, the network device may be, for example, gNB in ​​NR, which includes the conventional composition and functions of the network device in addition to the function of the acquisition device of the uplink transmission timing advance described in Embodiment 3, as implemented It is described in Example 5 and will not be repeated here.
[0264]
In this embodiment, the terminal device is, for example, a UE served by gNB. In addition to the functions of the apparatus described in Embodiment 10 or 11, it also includes the conventional composition and functions of the terminal device, as described in Embodiment 12, This will not be repeated here.
[0265]
Through the communication system of this embodiment, the normal transmission of data is ensured.
[0266]
An embodiment of the present invention also provides a computer-readable program, wherein when the program is executed in a network device, the program causes the computer to execute the method in Embodiment 1 in the network device.
[0267]
An embodiment of the present invention also provides a storage medium storing a computer-readable program, where the computer-readable program causes a computer to execute the method described in Embodiment 1 in a network device.
[0268]
An embodiment of the present invention also provides a computer-readable program, wherein when the program is executed in a terminal device, the program causes the computer to execute the embodiment 2 or 8 or 9 in the terminal device Methods.
[0269]
An embodiment of the present invention further provides a storage medium storing a computer-readable program, wherein the computer-readable program causes the computer to execute the method described in Embodiment 2 or Embodiment 8 or Embodiment 9 in a terminal device.
[0270]
The above device and method of the present invention may be implemented by hardware, or may be implemented by hardware in combination with software. The present invention relates to such a computer-readable program which, when executed by a logic component, can enable the logic component to implement the above-described device or constituent component, or enable the logic component to implement the various methods described above Or steps. Logic components such as field programmable logic components, microprocessors, processors used in computers, etc. The invention also relates to storage media for storing the above programs, such as hard disks, magnetic disks, optical disks, DVDs, flash memories, and so on.
[0271]
The method/apparatus 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 both. For example, one or more of the functional block diagrams shown in FIG. 8 and/or one or more combinations of the functional block diagrams (eg, acquisition unit, first sending unit, etc.) may correspond to various software of the computer program flow Modules can also correspond to individual hardware modules. These software modules can correspond to the steps shown in FIG. 5 respectively. These hardware modules can be realized by solidifying these software modules using, for example, a field programmable gate array (FPGA).
[0272]
The software module may 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 an integral part 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 in a memory card that can be inserted into the mobile terminal. For example, if the device (such as a mobile terminal) uses a large-capacity MEGA-SIM card or a large-capacity flash memory device, the software module may be stored in the MEGA-SIM card or a large-capacity flash memory device.
[0273]
For one or more of the functional blocks described in the drawings and/or one or more combinations of the functional blocks, it can be implemented as a general-purpose processor, digital signal processor (DSP) 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 suitable 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, multiple microprocessing Processor, one or more microprocessors in communication with the DSP, or any other such configuration.
[0274]
The present invention has been described above in conjunction with specific embodiments, but those skilled in the art should understand that these descriptions are 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 based on the spirit and principles of the present invention, and these variations and modifications are also within the scope of the present invention.
[0275]
According to various embodiments disclosed in the embodiments of the present invention, the following additional notes are also disclosed:
[0276]
Appendix 1. An upstream transmission timing advance adjustment device, wherein the device includes:
[0277]
Receiving means for receiving a timing advance command (TA command), the timing advance TA command comprises a command value (T A );
[0278]
Determination means, based on which the T A uplink transmission timing of the determined adjustment;
[0279]
A processing unit that applies the adjusted uplink transmission timing after the first time point;
[0280]
Wherein, the first time point is related to a second reference SCS, and the second reference SCS is predefined or pre-configured; and/or,
[0281]
The first time point is related to an operating band of the serving cell of the terminal device.
[0282]
Appendix 2. The device according to Appendix 1, wherein the second reference SCS is predefined means that the SCS is preset in the terminal device before shipment.
[0283]
Appendix 3. The device according to Appendix 1, wherein:
[0284]
The receiving unit also receives first configuration information sent by a network device, where the first configuration information is used to indicate the second reference SCS, or used by the terminal device to obtain the second reference SCS.
[0285]
Appendix 4. The device according to any one of Appendix 1 to Appendix 3, wherein the second reference SCS is the same as or different from the first reference SCS, and the first reference SCS calculates the timing for the terminal device Reference SCS for advance (T TA ).
[0286]
Appendix 5. The device according to Appendix 3, wherein, when the first configuration information is used to indicate the second reference SCS, the first configuration information is carried in at least one of the following information or signaling Middle: physical layer control channel, MAC signaling, RRC signaling, system information or broadcast information.
[0287]
Appendix 6. The apparatus according to Appendix 3, when the first configuration information is used by the terminal device to obtain the second reference SCS, the first configuration information is also used to indicate to the terminal device Activated uplink carrier bandwidth (BWP); the second reference SCS is the SCS of the activated uplink BWP.
[0288]
Appendix 7. The device according to Appendix 1, wherein:
[0289]
The receiving unit also receives second configuration information sent by the network device, where the second configuration information is used to indicate to the terminal device an activated uplink carrier bandwidth (BWP).
[0290]
Appendix 8. The device according to Appendix 6 or Appendix 7, wherein,
[0291]
The processing unit uses the activated upstream BWP after a second time point, and the second time point is the same as the first time point on the time axis or is located after the first time point.
[0292]
Appendix 9. The device according to Appendix 6 or Appendix 7, wherein,
[0293]
The processing unit uses the activated uplink BWP starting from the n+kth time unit, where n is the sequence number of the time unit in which the terminal device receives the second configuration information, and the k is greater than or equal to The sum of time units after the terminal device receives the TA command and before the first time point, where the time units are symbols, time slots, sub-time slots, or sub-frames, and n and k are natural numbers.
[0294]
Appendix 10. The device according to any one of Appendix 7 to Appendix 9, wherein,
[0295]
The receiving unit receives the second configuration information before the first time point.
[0296]
Appendix 11. The device according to any one of Appendix 7 to Appendix 10, wherein the second configuration information is carried by a physical layer control channel, or, MAC layer signaling, or RRC layer signaling.
[0297]
Appendix 12. An upstream carrier bandwidth (BWP) activation device, wherein the device includes:
[0298]
A receiving unit, which receives configuration information from a network device in the nth time unit, and the configuration information is used to indicate to the terminal device an activated upstream BWP;
[0299]
A processing unit that uses the activated upstream BWP from the n+kth time unit;
[0300]
Where n is a natural number, k is a positive integer and k is greater than or equal to K, and K is the number of time units between receiving a timing advance command and applying the uplink transmission timing adjusted based on the timing advance command. The time unit is Symbol, slot, sub-slot or sub-frame.
[0301]
Appendix 13. The device according to Appendix 12, wherein the receiving unit receives a timing advance command (TA command) after the nth time unit and before the n+k time unit.
Claims
[Claim 1]
A transmission timing advance of the uplink acquisition means, disposed at a network device, wherein the apparatus comprises: an acquisition unit that obtains a timing advance command value (T A ), the T A terminal device for calculating a timing advance (T TA ) is related to the first reference subcarrier bandwidth (SCS); the first sending unit sends a timing advance command (TA command), and the timing advance command includes the timing advance command value.
[Claim 2]
The apparatus according to claim 1, wherein the T A correlation for calculating T the TA first reference SCS is predefined or preconfigured.
[Claim 3]
The apparatus of claim 1 or claim 2, wherein the T A correlation for calculating T the TA first reference SCS is: the reference SCS when the terminal device side of the TA command to take effect.
[Claim 4]
The apparatus of claim 1 or claim 2, wherein the T A correlation for calculating T TA first reference SCS is: the network device transmits the TA command or the terminal device receives the TA Reference SCS on the terminal device side during command.
[Claim 5]
The apparatus according to claim 3 or 4, wherein the reference SCS on the terminal device side is a maximum or minimum value of a semi-statically configured uplink carrier bandwidth (UL BWP) in a timing advance group (TAG) corresponding to the TA command SCS; or, the reference SCS on the terminal device side is the maximum or minimum SCS of the UL BWP activated in the TAG corresponding to the TA command.
[Claim 6]
The apparatus according to claim 1, wherein the T A correlation for calculating T the TA first reference SCS to the network device designated SCS.
[Claim 7]
The apparatus according to claim 6, wherein the apparatus further comprises: a second sending unit that sends control signaling to the terminal device, and instructs the terminal device to specify its T a correlation for calculating T the TA first reference SCS's.
[Claim 8]
An uplink transmission timing advance acquisition device is configured in a terminal device, wherein the apparatus includes: a first receiving unit that receives a timing advance command (TA command) and obtains the timing advance command value in the TA command ( T A ); a determining unit that determines a first reference subcarrier bandwidth (SCS) related to the T A and used to calculate a timing advance (T TA ).
[Claim 9]
The apparatus according to claim 8, wherein said T A correlation for calculating the timing advance (T the TA ) a first reference subcarrier bandwidth (SCS) is a predefined or preconfigured.
[Claim 10]
The apparatus of claim 8 or claim 9, wherein the T A correlation for calculating T the TA first reference SCS is: the reference SCS when the terminal device side of the TA command to take effect.
[Claim 11]
8 or claim 9, wherein the T A correlation for calculating T TA first reference SCS is: the network device transmits the TA command or the terminal device receives the TA Reference SCS on the terminal device side during command.
[Claim 12]
The apparatus according to claim 8, wherein said T A correlation for calculating T the TA first reference SCS to the network device designated SCS.
[Claim 13]
The apparatus according to claim 12, wherein said apparatus further comprises: a second receiving means for receiving a control signaling sent by the network, the control signaling indicates that the network device with the specified T A The related first reference subcarrier bandwidth (SCS) used to calculate the timing advance (T TA ).
[Claim 14]
The apparatus according to claim 8, wherein said apparatus further comprises: calculation means, based on the T A is calculated for the related T TA first reference SCS calculated timing advance (T TA ).
[Claim 15]
The apparatus according to claim 14, wherein the calculation unit further calculates or adjusts the timing advance (T TA ) based on the reference SCS on the terminal device side corresponding to the uplink transmission time .
[Claim 16]
The apparatus according to claim 10, 11 or 15, wherein the reference SCS on the terminal device side is the maximum value of the semi-statically configured uplink carrier bandwidth (UL BWP) in the timing advance group (TAG) corresponding to the TA command Or the minimum SCS; or, the reference SCS on the terminal device side is the maximum or minimum SCS of the UL BWP activated in the TAG corresponding to the TA command.
[Claim 17]
A communication system including a network device and a terminal device, wherein the network device is configured with the device according to any one of claims 1-7; the terminal device is configured with any one of claims 8-16 Item described.