Title of Invention: Treatment method, device and system for LBT monitoring failure
Technical field
[0001]
The present invention relates to the field of communications, in particular to a method, device and system for processing LBT monitoring failure.
Background technique
[0002]
Radio Link Failure (RLF) is a hot topic in the research of communication standardization.
[0003]
In New Radio (NR), the detection of radio link failure will be triggered when the following conditions are met: the timer T 310 expires, the random access procedure fails and the timer T 311 is not running, and the radio link control (RLC) failure. Among them, the definition of timers T 310 and T 311 can refer to existing standards.
[0004]
Figure 1 is a schematic diagram of the random access process. As shown in Figure 1, when the terminal device does not receive a random access response or the contention resolution is unsuccessful, the counter "PREAMBLE_TRANSMISSION_COUNTER" is incremented by 1. When the value of the counter is "preambleTransMax+1", the terminal device indicates "random access problem" to the upper layer.
[0005]
In the case of a wireless link failure, if the terminal device is not configured with dual connectivity (Dual Connectivity, DC), or the terminal device is configured with DC and the wireless link failure occurs in the primary cell group (MCG), the terminal device considers it to be The radio link of the primary cell group failed. In this case, the terminal device can stay in the connected state, select a suitable cell and perform connection re-establishment. If it is determined that a suitable cell is not found within a certain period of time after the wireless link fails, the terminal device can enter the idle state. If the terminal is configured with DC and the radio link failure occurs in the secondary cell group (SCG), the terminal device considers the secondary cell group radio link failure. In this case, the terminal device can report the failure to the network device through the secondary cell group failure information process.
[0006]
On the other hand, the frequency resource problem has always been one of the important topics in the discussion of communication technology. In order to solve the frequency resource problem, in addition to improving resource utilization, the 3rd Generation Partnership Project (3GPP) also tried to use more frequency bands, including unliciensed bands. In order to provide 3GPP services on unlicensed frequency bands, the following mechanisms are introduced: Listen Before Talk (LBT), and Discovery RS Measurement Timing Configuration (DMTC).
[0007]
It should be noted that the above introduction to the technical background is only set forth to facilitate a clear and complete description of the technical solutions of the present invention and to facilitate the understanding of those skilled in the art. It should not be considered that the above technical solutions are well known to those skilled in the art just because these solutions are described in the background art part of the present invention.
[0008]
Summary of the invention
[0009]
The inventor found that when an unlicensed frequency band is used to provide a service for a terminal device, the network device and the terminal device need to monitor the channel before communicating to determine whether the channel is free. Only when the channel is idle, the terminal device can send uplink messages and uplink data, etc., which will have an impact on the behavior of the terminal device. In addition, in the random access process of the unlicensed frequency band, after the Medium Access Control (MAC) sublayer instructs the lower layer (physical layer) to send the random access preamble, the physical layer gives up due to LBT failure. The second preamble transmission. After giving up the preamble transmission, the behavior of the terminal device is unclear. This may affect the success rate of random access and the service of the terminal device in the connected state.
[0010]
In order to solve at least one of the above-mentioned problems or solve other similar problems, embodiments of the present invention provide a method for processing LBT monitoring failure, and a method, device, and system for sending a preamble.
[0011]
According to the first aspect of the embodiments of the present invention, there is provided a method for sending a random access preamble, wherein the method includes:
[0012]
The media access control (MAC) layer of the terminal device determines a first number of random access transmission opportunities (RO) for sending the preamble or selects a downlink reference signal related to the RO for sending the preamble;
[0013]
The physical layer of the terminal device determines a second number of ROs according to the first number of ROs or the downlink reference signal, and both the first number and the second number are greater than one.
[0014]
According to a second aspect of the embodiments of the present invention, there is provided a method for processing LBT monitoring failure, wherein the method includes:
[0015]
The physical layer of the terminal device performs LBT monitoring, and when the physical layer considers that the LBT monitoring fails, it indicates to the MAC layer or the RRC layer that the LBT monitoring fails or the random access preamble transmission is abandoned or the LBT detection instance fails;
[0016]
The MAC layer or the RRC layer of the terminal device performs at least one of the following processing according to the instruction:
[0017]
Perform resource selection;
[0018]
Trigger channel selection or BWP switching;
[0019]
Trigger wireless link failure;
[0020]
Trigger RRC connection re-establishment;
[0021]
Perform counter maintenance.
[0022]
According to a third aspect of the embodiments of the present invention, there is provided an apparatus for sending a random access preamble, which is configured in a terminal device, wherein the apparatus includes:
[0023]
A first determining unit, which determines a first number of random access transmission opportunities (RO) for sending a preamble at the media access control (MAC) layer of the terminal device, or selects and uses it for sending a preamble RO related downlink reference signal;
[0024]
A second determining unit, which determines a second number of ROs at the physical layer of the terminal device according to the first number of ROs or the downlink reference signal, and the first number and the second number are both greater than one.
[0025]
According to a fourth aspect of the embodiments of the present invention, there is provided an apparatus for processing LBT monitoring failure, which is configured in a terminal device, wherein the apparatus includes:
[0026]
The monitoring unit, which performs LBT monitoring at the physical layer of the terminal device, indicates to the MAC layer or RRC layer that the LBT monitoring fails or the random access preamble transmission is abandoned or the LBT detection instance fails when it considers that the LBT monitoring fails;
[0027]
A processing unit, which performs at least one of the following processing at the MAC layer or the RRC layer of the terminal device according to the instruction:
[0028]
Perform resource selection;
[0029]
Trigger channel selection or BWP switching;
[0030]
Trigger wireless link failure;
[0031]
Trigger RRC connection re-establishment;
[0032]
Perform counter maintenance.
[0033]
According to a fifth aspect of the embodiments of the present invention, there is provided a configuration method, wherein the method includes:
[0034]
The network device configures multiple initial BWPs for the terminal device in the idle state or the active state, and the terminal device determines an RO on each of the initial BWPs.
[0035]
According to a sixth aspect of the embodiments of the present invention, there is provided a configuration device configured in a network device, wherein the device includes:
[0036]
The configuration unit configures multiple initial BWPs for the terminal device in the idle state or the active state, and the terminal device determines an RO on each of the initial BWPs.
[0037]
According to a seventh aspect of the embodiments of the present invention, there is provided a terminal device, wherein the terminal device includes the apparatus described in the foregoing third aspect or fourth aspect.
[0038]
According to an eighth aspect of the embodiments of the present invention, there is provided a network device, wherein the network device includes the device described in the sixth aspect.
[0039]
According to a ninth aspect of the embodiments of the present invention, a communication system is provided, the communication system including the terminal device described in the seventh aspect and the network device described in the eighth aspect.
[0040]
According to other aspects of the embodiments of the present invention, a computer-readable program is provided, wherein when the program is executed in a terminal device, the program causes the computer to execute the aforementioned first aspect or third aspect in the terminal device. The method described.
[0041]
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 enables a computer to execute the method described in the first aspect or the third aspect in a terminal device.
[0042]
According to other aspects of the embodiments of the present invention, a computer-readable program is provided, wherein when the program is executed in a network device, the program causes a computer to execute the method described in the foregoing fifth aspect in the network device .
[0043]
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 enables a computer to execute the method described in the foregoing fifth aspect in a network device.
[0044]
The beneficial effect of the embodiment of the present invention is that the method for processing the LBT monitoring failure of the present embodiment shortens the response time after the LBT monitoring fails, and improves the success rate of random access. Through the random access preamble sending method of this embodiment, the MAC layer of the terminal device determines multiple transmission opportunities for sending the preamble or selects a downlink reference signal related to the transmission used to send the preamble to make the physical layer of the terminal device Multiple transmission opportunities are obtained, thereby increasing the transmission opportunities of random access and ensuring the reliability of random access.
[0045]
With reference to the following description and drawings, specific embodiments of the present invention are disclosed in detail, indicating the ways in which the principles of the present invention can be adopted. It should be understood that the scope of the embodiments of the present invention is not limited thereby. Within the spirit and scope of the terms of the appended claims, the embodiments of the present invention include many changes, modifications and equivalents.
[0046]
Features described and/or shown for one embodiment can be used in one or more other embodiments in the same or similar manner, combined with features in other embodiments, or substituted for features in other embodiments .
[0047]
It should be emphasized that the term "comprising/comprising" when used herein refers to the existence of a feature, a whole, a step or a component, but does not exclude the existence or addition of one or more other features, a whole, a step or a component.
Description of the drawings
[0048]
The elements and features described in one drawing or one implementation of the embodiment of the present invention may be combined with the elements and features shown in one or more other drawings or implementations. In addition, in the drawings, similar reference numerals indicate corresponding parts in several drawings, and may be used to indicate corresponding parts used in more than one embodiment.
[0049]
The included drawings are used to provide a further understanding of the embodiments of the present invention, which constitute a part of the specification, are used to illustrate the embodiments of the present invention, and together with the text description, explain the principle 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, other drawings can be obtained based on these drawings without creative labor. In the attached picture:
[0050]
Figure 1 is a schematic diagram of an existing random access process;
[0051]
Fig. 2 is a schematic diagram of a communication system according to an embodiment of the present invention;
[0052]
Fig. 3 is a schematic diagram of a method for transmitting a random access preamble of embodiment 1;
[0053]
4 is a schematic diagram of the processing method of the LBT monitoring failure of Embodiment 2;
[0054]
5 is a schematic diagram of the configuration method of Embodiment 3;
[0055]
Fig. 6 is a schematic diagram of a random access preamble sending device of embodiment 4;
[0056]
FIG. 7 is a schematic diagram of a processing device for LBT monitoring failure of Embodiment 5;
[0057]
8 is a schematic diagram of the configuration device of Embodiment 6;
[0058]
FIG. 9 is a schematic diagram of a terminal device of Embodiment 7;
[0059]
FIG. 10 is a schematic diagram of a network device of Embodiment 8.
detailed description
[0060]
With reference to the drawings, the foregoing and other features of the present invention will become apparent through the following description. In the description and drawings, specific embodiments of the present invention are specifically disclosed, which indicate some embodiments in which the principles of the present invention can be adopted. It should be understood that the present invention is not limited to the described embodiments. On the contrary, the present invention is not limited to the described embodiments. The invention includes all modifications, variations and equivalents falling within the scope of the appended claims.
[0061]
In the embodiments of the present invention, the terms "first", "second", etc. are used to distinguish different elements in terms of appellations, but they do not indicate the spatial arrangement or chronological order of these elements. These elements should not be referred to by these terms. Limited. The term "and/or" includes any and all combinations of one or more of the associated listed terms. The terms "comprising", "including", "having" and the like refer to the existence of the stated features, elements, elements or components, but do not exclude the presence or addition of one or more other features, elements, elements or components.
[0062]
In the embodiments of the present invention, the singular forms "a", "the", etc. include plural forms, and should be broadly understood as "a" or "a type" rather than being limited to the meaning of "a"; in addition, the term "so" "Said" should be understood to include both singular and plural forms, unless the context clearly indicates otherwise. In addition, the term "based on" should be understood as "based at least in part on...", and the term "based on" should be understood as "based at least in part on..." unless the context clearly dictates otherwise.
[0063]
In the embodiment of the present invention, the term "communication network" or "wireless communication network" may refer to a network that complies with any of the following communication standards, such as Long Term Evolution (LTE), and Enhanced Long Term Evolution (LTE-A, LTE- Advanced), Wideband Code Division Multiple Access (WCDMA, Wideband Code Division Multiple Access), High-Speed ​​Packet Access (HSPA, High-Speed ​​Packet Access), etc.
[0064]
In addition, the communication between devices in the communication system can be carried out according to any stage of communication protocol, for example, it can include but not limited to the following communication protocols: 1G (generation), 2G, 2.5G, 2.75G, 3G, 4G, 4.5G and future 5G, New Radio (NR, New Radio), etc., and/or other communication protocols currently known or to be developed in the future.
[0065]
In the embodiment of the present invention, the term “network device” refers to, for example, a device in a communication system that connects a terminal device to a communication network and provides services for the terminal device. Network equipment may include but is not limited to the following equipment: base station (BS, Base Station), access point (AP, Access Point), transmission and reception point (TRP, Transmission Reception Point), broadcast transmitter, mobile management entity (MME, Mobile Management Entity), gateway, server, radio network controller (RNC, Radio Network Controller), base station controller (BSC, Base Station Controller), etc.
[0066]
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 also include remote radio head (RRH, Remote Radio Head), remote End radio unit (RRU, Remote Radio Unit), relay (relay), or low-power node (such as femto, pico, etc.). And the term "base station" can include some or all of their functions, and each base station can provide communication coverage for a specific geographic area. The term "cell" may refer to a base station and/or its coverage area, depending on the context in which the term is used.
[0067]
In the embodiment 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). Terminal equipment can be fixed or mobile, and can also be called mobile station (MS, Mobile Station), terminal, user, subscriber station (SS, Subscriber Station), access terminal (AT, Access Terminal), station, etc. Wait.
[0068]
Terminal devices may include but are not limited to the following devices: Cellular Phone, Personal Digital Assistant (PDA), wireless modem, wireless communication device, handheld device, machine-type communication device, laptop computer, cordless phone , Smart phones, smart watches, digital cameras, etc.
[0069]
For another example, in scenarios such as the Internet of Things (IoT, Internet of Things), the terminal device can also be a machine or device that performs monitoring or measurement. For example, it can include but is not limited to: Machine Type Communication (MTC) terminals, Vehicle-mounted communication terminals, device to device (D2D, Device to Device) terminals, machine to machine (M2M, Machine to Machine) terminals, etc.
[0070]
The following describes the scenario of the embodiment of the present invention through an example, but the embodiment of the present invention is not limited to this.
[0071]
FIG. 2 is a schematic diagram of a communication system according to an embodiment of the present invention, schematically illustrating a case where a terminal device and a network device are taken as an example. As shown in FIG. 2, the communication system 200 may include: a network device 201 and a terminal device 202. For the sake of simplicity, Figure 2 only takes one terminal device as an example for illustration. The network device 201 is, for example, the network device gNB in ​​the NR system.
[0072]
In the embodiment of the present invention, existing services or services that can be implemented in the future can be performed between the network device 201 and the terminal device 202. For example, these services include but are not limited to: enhanced mobile broadband (eMBB, enhanced Mobile Broadband), massive machine type communication (mMTC, massive machine type communication), and highly reliable and low-latency communication (URLLC, Ultra-Reliable and Low- Latency Communication), etc.
[0073]
The terminal device 202 can send data to the network device 201, for example, using an unauthorized transmission method. The network device 201 can receive data sent by one or more terminal devices 202, and feed back information (for example, acknowledgement ACK/non-acknowledgement NACK) information to the terminal device 202, and the terminal device 202 can confirm the end of the transmission process according to the feedback information, or can further Perform new data transmission, or data retransmission can be performed.
[0074]
Various embodiments of the present invention will be described below with reference to the accompanying drawings. These embodiments are only exemplary, and are not limitations to the present invention.
[0075]
Example 1
[0076]
This embodiment provides a method for sending a random access preamble, and the method is applied to a terminal device. Fig. 3 is a schematic diagram of a method for sending a random access preamble of this embodiment. Please refer to Fig. 3, the method includes:
[0077]
Step 301: The media access control (MAC) layer of the terminal device determines the first number of random access transmission opportunities (RO) used to send the preamble or selects a downlink reference related to the RO used to send the preamble signal;
[0078]
Step 302: The physical layer of the terminal device determines a second number of ROs according to the first number of ROs or the downlink reference signal, and both the first number and the second number are greater than one.
[0079]
In an implementation of this embodiment, the MAC layer of the terminal device can determine multiple transmission opportunities, and thus, the physical layer of the terminal device can obtain the multiple transmission opportunities and send on at least one of the multiple transmission opportunities preamble. As the transmission opportunity is increased, the terminal device can perform multiple LBT monitoring, which increases the chance of sending the preamble. In this embodiment, the above-mentioned first number and the above-mentioned second number are both greater than one. In addition, the first number and the second number may be the same or different.
[0080]
In this embodiment, LBT monitoring is taken as an example for description. The LBT monitoring mechanism can also be replaced with other mechanisms for channel busy/idle assessment, such as clear channel assessment (CCA), etc. This embodiment is not limited to this.
[0081]
In another implementation of this embodiment, the MAC layer of the terminal device does not determine the foregoing transmission opportunity, but indicates the selected downlink reference signal. The downlink reference signal is related to the foregoing transmission opportunity. The physical layer of the terminal device selects according to the MAC layer. The downlink reference signal can obtain multiple transmission opportunities related to it, and then send the preamble at the multiple transmission opportunities, and the terminal device can perform multiple LBT monitoring, which increases the chance of sending the preamble. In this embodiment, the above-mentioned second number is greater than one.
[0082]
In this embodiment, the physical layer of the terminal device can determine the aforementioned second number of ROs based on the aforementioned first number of ROs or the aforementioned downlink reference signal, or can further refer to other rules or criteria to determine the aforementioned second number of ROs. Examples are not limited to this.
[0083]
In this embodiment, the aforementioned downlink reference signal may be a synchronization signal/broadcast channel block (SSB), a channel state information reference signal (CSI-RS), or a combination of the two, but this embodiment is not limited to this The downlink reference signal may also have other names, or borrow current standard names to add the above-mentioned functions applicable to the method of this embodiment.
[0084]
In step 301 of this embodiment, the physical layer of the terminal device determines the above-mentioned first number of ROs, and the following methods may be used:
[0085]
method one:
[0086]
The MAC layer of the terminal device selects a third number of SSBs and/or CSI-RSs, determines an RO corresponding to each selected SSB and/or CSI-RS, and obtains the first number of ROs.
[0087]
In this method, the MAC layer can select multiple SSBs and/or CSI-RSs, and determine a corresponding RO corresponding to each selected SSB and/or CSI-RS, thereby obtaining multiple ROs. Since the RO of the SSB may overlap with the RO of the CSI-RS, the third number is greater than the first number, and the first number is greater than one.
[0088]
Method Two:
[0089]
The MAC layer of the terminal device selects one SSB or CSI-RS, and determines the first number of ROs associated with the selected SSB or CSI-RS.
[0090]
In this method, the MAC layer selects only one SSB or CSI-RS, corresponding to the selected SSB or CSI-RS, and determines multiple ROs (the first number of ROs) according to the configuration, where multiple ROs (the first number of ROs) RO) may be all ROs corresponding to the selected SSB or CSI-RS, and may be some ROs selected from all ROs corresponding to the selected SSB or CSI-RS, which is not limited in this embodiment. In addition, the specific selection method is not limited in this embodiment. For example, it may be based on a principle specified by a network device, or may be based on implementation. In addition, this method is applicable to the situation where one SSB or CSI-RS is associated with multiple ROs.
[0091]
Method three:
[0092]
If the terminal device is idle or inactive, and the terminal device is configured with the first number of initial bandwidth parts (BWP), the MAC layer of the terminal device can determine an RO on each initial BWP , Thus obtain the above-mentioned first number of RO.
[0093]
In this method, the terminal device is configured with multiple BWPs, and the MAC layer can determine one RO on each initial BWP, so that multiple ROs (the first number of ROs) can be obtained. Moreover, this method is suitable for a single-activated BWP scenario, that is, only the initial BWP that is successfully monitored by the LBT and the preamble is sent is the activated BWP.
[0094]
Method four:
[0095]
If the terminal device is in a connected state (connected), the MAC layer of the terminal device can determine an RO on each configured BWP.
[0096]
In the current standard, there are at most four BWPs on a cell, and one of them is in an active state, then the MAC layer can determine one RO on the four BWPs respectively to obtain four ROs (the first number of ROs). This method is also suitable for single activation BWP scenarios. If the RO successfully monitored by LBT is on the activated BWP, the terminal device can transmit the preamble on the activated BWP. If the RO successfully monitored by the LBT is not on the activated BWP, the terminal device The preamble can be transmitted on the BWP successfully monitored by the LBT. During the random access process, the terminal device can return to the activated BWP or stay on the BWP that transmits the preamble, and determine that the BWP is the activated BWP.
[0097]
Method Five:
[0098]
The MAC layer of the terminal device respectively determines an RO on the first number of aggregated carriers. This method is suitable for carrier aggregation scenarios, and the MAC layer can determine one RO on multiple aggregated carriers, thereby obtaining multiple ROs (the first number of ROs).
[0099]
Method Six:
[0100]
The MAC layer of the terminal device determines an RO for each random access process. This method is suitable for the case of parallel random access. One RO is determined for each random access process, thereby obtaining multiple ROs (the first number of ROs).
[0101]
Method Seven:
[0102]
The MAC layer of the terminal device determines an RO on each activated BWP. This method is suitable for scenarios where multiple BWPs are activated. One RO is determined for each activated BWP, thereby obtaining multiple ROs (the first number of ROs).
[0103]
The above methods can be used alone or in combination, which is not limited in this embodiment.
[0104]
In step 302 of this embodiment, in the case that the physical layer of the terminal device determines multiple ROs (the second number of ROs), the physical layer can also determine the RO for LBT monitoring, that is, which RO or which RO Perform LBT monitoring.
[0105]
In one embodiment, the physical layer may perform LBT monitoring on all the above-mentioned second number of ROs. In this embodiment, if the LBT monitoring of more than one RO is successful, the physical layer can perform preamble transmission on all successful ROs, or select a part (one or more) from the above successful ROs to perform preamble transmission. transmission.
[0106]
In another embodiment, the physical layer may select a part of ROs from the above-mentioned second number of ROs for LBT monitoring. In this embodiment, if the LBT of this part of the RO is successful, the physical layer can perform preamble transmission on this part of the RO, or select a part (one or more) of the above successful ROs for preamble transmission.
[0107]
In another embodiment, the physical layer may perform LBT monitoring on the above-mentioned first number of ROs in chronological order until a certain condition (referred to as the first condition) is met, for example, a specified number (referred to as the fourth quantity, which can be one Or more) LBT is successful, or LBT monitoring is performed on all the above-mentioned second number of ROs. In this embodiment, if the above-mentioned prescribed number of LBTs are successful, the physical layer can perform preamble transmission on all successful ROs, or select a part (one or more) of them to perform preamble transmission.
[0108]
The above three implementation manners are only examples for illustration, and which method is specifically adopted may depend on the configuration of the network device, or based on standard regulations, or may also depend on the implementation of the terminal device itself, and this embodiment does not limit it.
[0109]
In step 302 of this embodiment, in the case that the physical layer of the terminal device determines multiple ROs (the second number of ROs), the terminal device may also determine the receiving window for starting the RAR. In the existing standard, after the MAC layer completes random access resource selection (determining the resources and preamble for random access), random access transmission (calculating the target received power and RA-RNTI, if necessary), etc., after determining On a specific PDCCH occasion after the last symbol of the random access resource, a random access response (RAR) window is started. In this embodiment, since the terminal device has determined multiple ROs, the terminal device also needs to determine when to start the window for receiving the RAR (referred to as the receiving window of the RAR).
[0110]
In this embodiment, the terminal device may start the RAR receiving window according to the aforementioned first number of ROs (that is, the RO determined by the MAC layer) or according to the aforementioned second number of ROs (that is, the RO determined by the physical layer).
[0111]
In one embodiment, the terminal device can determine a receiving window of an RAR, that is, maintaining a receiving window of an RAR, there are several methods as follows.
[0112]
method one:
[0113]
If the physical layer of the terminal device only transmits the preamble on one RO, the RO that initiates the receiving window of the RAR is the RO that transmits the preamble.
[0114]
In this method, the MAC layer determines one or more ROs. When the MAC layer instructs the physical layer to perform preamble transmission, the physical layer only transmits preamble on one RO, and the terminal device performs preamble transmission on the RO Start the receiving window of RAR on.
[0115]
Method Two:
[0116]
If the physical layer of the terminal device performs preamble transmission on multiple ROs, the RO that initiates the receiving window of the RAR is the first or last RO among the multiple ROs.
[0117]
In this method, the MAC layer determines one or more ROs. When the MAC layer instructs the physical layer to perform preamble transmission, the physical layer performs preamble transmission on multiple ROs, and the terminal device performs preamble transmission. The receiving window of the RAR is started on the first OR or the last RO in the RO.
[0118]
In this method, if the terminal device starts the RAR receiving window on the first RO that has undergone preamble transmission, the terminal device can also restart the RAR receiving window on the RO that has subsequently undergone preamble transmission, or extend the RAR The window length of the receiving window, or stop the current RAR receiving window and start a new RAR receiving window.
[0119]
Both the above method 1 and method 2 only consider the RO for preamble transmission.
[0120]
Method three:
[0121]
If the LBT monitoring of only one RO succeeds, the RO that starts the receiving window of the RAR is the RO whose LBT monitoring succeeds.
[0122]
In this method, if there is only one RO successfully monitored by the LBT, the terminal device starts the RAR receiving window on the RO successfully monitored by the LBT.
[0123]
Method four:
[0124]
If the LBT monitoring of multiple ROs succeeds, the RO that initiates the receiving window of the RAR is the first or last RO among the ROs successfully monitored by the LBT.
[0125]
In this method, if there are multiple ROs successfully monitored by the LBT, the terminal device can start the RAR receiving window on the first RO or the last RO among the ROs successfully monitored by the LBT.
[0126]
In this method, if the terminal device starts the RAR receiving window on the first RO successfully monitored by LBT, the terminal device can also restart the RAR receiving window on each RO succeeded by LBT monitoring, or expand the RAR The window length of the receiving window, or stop the current RAR receiving window and start a new RAR receiving window.
[0127]
The above method 3 and method 4 consider all ROs successfully monitored by LBT.
[0128]
Method Five:
[0129]
If only one RO has performed LBT monitoring, the RO that initiates the receiving window of the RAR is the RO that performed LBT monitoring.
[0130]
In this method, if only one RO has performed LBT monitoring, the terminal device can start the RAR receiving window on the RO that has performed LBT monitoring.
[0131]
Method Six:
[0132]
If multiple ROs have performed LBT monitoring, the RO that initiates the receiving window of the RAR is the first or last RO among the ROs that have performed LBT monitoring.
[0133]
In this method, if multiple ROs have performed LBT monitoring, the terminal device can start the RAR receiving window on the first RO or the last RO of the ROs that have performed LBT monitoring.
[0134]
In this method, if the terminal device starts the RAR receiving window on the first RO that has undergone LBT monitoring, the terminal device can also restart the RAR receiving window on each subsequent RO that has undergone LBT monitoring, or Extend the window length of the RAR receiving window, or stop the current RAR receiving window and start a new RAR receiving window.
[0135]
The above method 5 and method 6 consider all ROs that have undergone LBT monitoring.
[0136]
Method Seven:
[0137]
If the MAC layer of the terminal device determines an RO, the RO that starts the receiving window of the RAR is the RO determined by the MAC layer of the terminal device.
[0138]
In this method, if the MAC layer provides only one RO, the terminal device can start the RAR receiving window on the RO provided by the MAC layer.
[0139]
Method eight:
[0140]
If the MAC layer of the terminal device determines multiple ROs, the RO that starts the receiving window of the RAR is the first or last RO among the ROs determined by the MAC layer of the terminal device.
[0141]
In this method, if the MAC layer provides multiple ROs, the terminal device can start the RAR receiving window on the first RO or the last RO among the ROs provided by the MAC layer.
[0142]
In this method, if the terminal device starts the RAR receiving window on the first RO provided by the MAC layer, the terminal device can also restart the RAR receiving window on each RO provided by the MAC layer thereafter, or extend the RAR The window length of the receiving window, or stop the current RAR receiving window and start a new RAR receiving window.
[0143]
The above method 7 and method 8 consider the RO provided by all MAC layers.
[0144]
In another embodiment, the terminal device may also determine the receiving windows of multiple RARs, that is, maintaining the receiving windows of multiple RARs, and there may be the following methods:
[0145]
method one:
[0146]
If the physical layer of the terminal device transmits preambles on multiple ROs, the terminal device starts a RAR receiving window on each or each group of ROs that have transmitted the preamble, and on each group of ROs In the case of starting one RAR receiving window, the RO that starts the receiving window of the RAR is the first or last RO of the multiple ROs that have transmitted the preamble.
[0147]
In this method, the RO that has carried out preamble transmission is considered. When the MAC layer instructs the physical layer to carry out preamble transmission, the physical layer has carried out preamble transmission on multiple ROs, and the terminal device has carried out preamble transmission in each The RAR receiving window is started on the RO, or the terminal device can group the ROs that have undergone preamble transmission, and start a RAR receiving window on each group.
[0148]
In this method, the grouping rule may be: the RO corresponding to each SSB or CSI-RS is a group, or the RO on each channel or BWP is a group, or the RO on each cell is a group. However, this embodiment is not limited to this, and ROs that have undergone preamble transmission may also be grouped according to other rules.
[0149]
Method Two:
[0150]
If the LBT monitoring of multiple ROs is successful, the terminal device starts a RAR receiving window on each or each group of ROs whose LBT monitoring is successful, and in the case of starting a RAR receiving window on each group of ROs, starts all The RO of the receiving window of the RAR is the first or last RO of the multiple ROs successfully monitored by the LBT.
[0151]
In this method, all ROs with successful LBT monitoring are considered. If there are multiple ROs with successful LBT monitoring, the terminal device can start the RAR receiving window on each RO successfully monitored by LBT, or the terminal device can monitor LBT Successful ROs are grouped and a RAR receiving window is started on each group.
[0152]
In this method, the grouping rules are the same as the method one, and the description is omitted here.
[0153]
Method three:
[0154]
If multiple ROs have performed LBT monitoring, the terminal device starts one RAR receiving window on each or each group of ROs that have performed LBT monitoring, and starts one RAR receiving window on each group of ROs. The RO of the receiving window of the RAR is the first or last RO of the multiple ROs that have been monitored by LBT.
[0155]
In this method, all ROs that have been monitored by LBT are considered. If there are multiple ROs that have been monitored by LBT, the terminal device can start the RAR receiving window on each RO that has been monitored by LBT, or the terminal device can Group the ROs that have undergone LBT monitoring, and start a RAR receiving window on each group.
[0156]
In this method, the grouping rules are the same as the method one, and the description is omitted here.
[0157]
Method four:
[0158]
If the MAC layer of the terminal device determines multiple ROs, the terminal device starts a RAR receiving window on each RO determined by the MAC layer of the terminal device or each group, and starts the receiving window of the RAR RO is the first or last RO of the multiple ROs determined by the MAC layer of the terminal device.
[0159]
In this method, all the ROs provided by the MAC layer are considered. If there are ROs provided by multiple MAC layers, the terminal device can start the RAR receiving window on the RO provided by each MAC layer, or the terminal device can respond to the MAC layer. The provided ROs are grouped, and a RAR receiving window is started on each group.
[0160]
In this method, the grouping rules are the same as the method one, and the description is omitted here.
[0161]
The receiving window of the RAR is activated by the foregoing method of this embodiment, and when there are multiple ROs, the timing of the activation of the receiving window of the RAR can be determined, so as to maintain the receiving window of the RAR. Based on this method, the terminal side and the network side have a consistent understanding of the maintenance of the RAR receiving window, so that the network device can complete the RAR transmission within the RAR receiving window, which improves the success rate of random access.
[0162]
This embodiment takes the sending of preamble as an example for description, but this embodiment is not limited to this, the same method can also be applied to the transmission of msg.3, for example, multiple transmission opportunities are determined for multiple msg.3, and the corresponding maintenance is maintained. One or more contention resolution timers of msg.3. I won't repeat them here.
[0163]
Through the method of this embodiment, the chance of sending the preamble is increased, and various problems that arise when the transmission chance of the preamble is increased are solved.
[0164]
Example 2
[0165]
This embodiment provides a method for processing LBT monitoring failure, which is applied to terminal equipment. This method can be used in combination with the method in embodiment 1, or used alone, and the same contents as in embodiment 1 will not be repeated. Description.
[0166]
FIG. 4 is a schematic diagram of a method for processing LBT monitoring failure in this embodiment. Please refer to FIG. 4, the method includes:
[0167]
Step 401: The physical layer of the terminal device performs LBT monitoring, and when the physical layer considers that the LBT monitoring fails, it indicates to the MAC layer or the RRC layer that the LBT monitoring fails or the preamble transmission is abandoned or the LBT detection instance fails;
[0168]
Step 402: The MAC layer or the RRC layer of the terminal device performs at least one of the following processing according to the instruction: perform resource selection; trigger channel selection or BWP handover; trigger radio link failure; trigger RRC connection re-establishment; perform counter maintenance .
[0169]
In step 401 of this embodiment, the physical layer may consider that the LBT monitoring has failed when at least one of the following conditions is satisfied:
[0170]
Condition 1:
[0171]
One LBT monitoring result was busy.
[0172]
Under this condition, after the physical layer has performed an LBT monitoring, if it is determined to be busy, it is considered that the LBT monitoring has failed. It can indicate to the MAC layer or the RRC layer the information that the LBT monitoring failed or the information that the preamble transmission is abandoned, or it does not perform the above instructions, but decides subsequent processing by itself. As described in Embodiment 1, it will not be repeated here.
[0173]
Condition two:
[0174]
One or more LBT monitoring results of the preamble transmission opportunity (RO) indicated by the MAC layer of the terminal device are busy.
[0175]
In this condition, the MAC layer may indicate (or determine) an RO, and the physical layer performs one or more (parallel or serial) LBT monitoring for the RO. If all are determined to be busy, the LBT monitoring is considered to have failed.
[0176]
Condition three:
[0177]
For multiple LBT monitoring within a period of time, the LBT monitoring result is that the number of busy instances reaches the first number.
[0178]
In this condition, the physical layer can perform multiple LBT monitoring within a certain period of time, confirm that the number of busy times reaches a certain number, and consider that the LBT monitoring has failed.
[0179]
Condition four:
[0180]
For multiple LBT monitoring, the proportion of busy LBT monitoring results reached the first proportion.
[0181]
In this condition, the physical layer can perform multiple LBT monitoring, confirming that the number of busy times and the total number of performing LBT monitoring reach a ratio, and it is considered that the LBT monitoring has failed.
[0182]
Condition five:
[0183]
The LBT monitoring result is that the number of busy instances reaches the second number. During the timing of the first timer, the LBT monitoring result indicates that the number of idle instances does not reach the third number, wherein the first timer is in the LBT The monitoring result is started when the number of busy instances reaches the second number.
[0184]
In this condition, the LBT instance refers to the situation where the LBT monitoring is performed once, that is, when the condition one is satisfied, the monitoring result of an LBT instance is considered to be a failure.
[0185]
Condition six:
[0186]
After the second timer expires, the number of instances whose LBT monitoring result is busy reaches the fourth number, where the second timer is started when the monitoring result of one LBT instance is busy.
[0187]
In this condition, the concept of the LBT instance is the same as described above, and the description is omitted here.
[0188]
Condition seven:
[0189]
On a channel or BWP, for multiple LBT monitoring within a period of time, the LBT monitoring result is that the number of busy instances reaches the fifth number.
[0190]
Condition eight:
[0191]
On one channel or BWP, for multiple LBT monitoring, the proportion of LBT monitoring results that is busy reaches the second proportion.
[0192]
Condition nine:
[0193]
On a channel or BWP, the number of busy instances as a result of LBT monitoring reaches the sixth number, and the number of instances where the LBT monitoring result is idle does not reach the seventh number within the timing time of the third timer, where the third The timer is started when the number of busy instances as a result of the LBT monitoring reaches the sixth number.
[0194]
Condition ten:
[0195]
On a channel or BWP, after the fourth timer expires, the number of instances where the LBT monitoring result is busy reaches the eighth number, where the fourth timer is started when the monitoring result of one LBT instance is busy.
[0196]
Condition 11:
[0197]
For one SSB and/or CSI-RS, for multiple LBT monitoring within a period of time, the number of busy instances as a result of LBT monitoring reaches the ninth number.
[0198]
Condition twelve:
[0199]
For one SSB and/or CSI-RS, for multiple LBT monitoring, the proportion of busy LBT monitoring results reaches the third proportion.
[0200]
Condition thirteen:
[0201]
For an SSB and/or CSI-RS, the number of instances where the LBT monitoring result is busy reaches the tenth number, and the number of instances where the LBT monitoring result is idle does not reach the eleventh number within the time period of the fifth timer. Among them, The fifth timer is started when the number of busy instances as a result of the LBT monitoring reaches the tenth number.
[0202]
Condition fourteen:
[0203]
For one SSB and/or CSI-RS, after the sixth timer expires, the number of instances where the LBT monitoring result is busy reaches the twelfth number, where the sixth timer is when the monitoring result of one LBT instance is busy Started at the time.
[0204]
The above condition 7 to condition 10 are similar to the aforementioned condition 3 to condition 6, and the difference from the condition 3 to condition 6 is that the LBT monitoring is performed for a certain channel or BWP. In the case that any one of the above-mentioned condition 7 to condition 10 is satisfied, the physical layer of the terminal device may also provide the MAC layer with information on the channel or BWP for which the LBT monitoring result failed.
[0205]
The above condition 11 to condition 14 are similar to the aforementioned condition 3 to condition 6, and the difference from the condition 3 to condition 6 is that the LBT monitoring is performed for a certain SSB and/or CSI-RS. In the case that any one of the above conditions 11 to 14 is satisfied, the physical layer of the terminal device may also provide the MAC layer with the index of the SSB and/or the resource identifier of the CSI-RS for which the LBT monitoring result fails.
[0206]
The "period time" in the foregoing conditions three, seven, and eleven may be described as a time interval T or a period T, and this embodiment is not limited thereto.
[0207]
In step 402 of this embodiment, when receiving an indication of failure of LBT monitoring from the physical layer or an indication of abandonment of the current preamble transmission or an indication of failure of the LBT detection instance, the MAC layer may perform resource selection, for example, a preamble transmission counter Do not increase and do not perform power ramp or preamble transmission counter increase but do not perform power ramp. Here, the indication that the transmission of the preamble is abandoned can also be understood as an indication that the LBT monitoring has failed, which is not limited in this embodiment.
[0208]
In this embodiment, considering that in the contention-based random access process, before msg.3 transmission, LBT monitoring will also be performed, and msg.3 transmission will maintain a contention resolution timer, so the method of this embodiment It can also be applied to msg.3, that is, when the transmission of msg.3 is cancelled due to the failure of LBT monitoring, the random access resource selection is directly performed without waiting for the contention resolution timer to expire.
[0209]
With the method of this embodiment, in the case of LBT failure, the terminal device can directly select resources without waiting for the time of the RAR receiving window, thereby speeding up the process of random access and reducing the energy consumption of the terminal device.
[0210]
In step 402 of this embodiment, upon receiving the indication of LBT monitoring failure from the physical layer or the indication of the current preamble transmission abandonment or the indication of the failure of LBT detection instance, the MAC layer may perform channel selection or BWP switching; or MAC The layer can also trigger channel selection or BWP switching when the first condition is met. The first condition here is at least one of the aforementioned condition 7 to condition 10, which will not be repeated here.
[0211]
In this embodiment, as mentioned above, the physical layer of the terminal device can also provide the channel or BWP for which the LBT monitoring result fails to the MAC layer, that is, the MAC layer of the terminal device can also receive the LBT monitoring result from the physical layer The failed channel or BWP in order to determine the above conditions.
[0212]
In this embodiment, a BWP may include multiple channels (for example, in a connected state), and LBT monitoring of some channels fails, while LBT monitoring of other channels succeeds. In this embodiment, as long as there is an LBT monitoring failure, it is considered that the LBT monitoring on this BWP fails.
[0213]
In this embodiment, when channel selection or BWP handover occurs, the random access process is terminated or ended; after channel selection or BWP handover is completed, a new random access process can be initiated; or channel selection during random access is allowed Or BWP switch.
[0214]
With the method of this embodiment, when LBT monitoring fails or certain conditions (the first condition) are met, the terminal device can perform channel selection or BWP switching, thereby avoiding random attempts on channels or BWPs that have always failed LBT monitoring. Access. In this way, it can save energy for the terminal device and provide a better user experience. This method is suitable for terminal devices in all states, such as idle state, inactive state and connected state.
[0215]
In step 402 of this embodiment, when receiving an indication of a failure of LBT monitoring from the physical layer or an indication of abandonment of the current preamble transmission or an indication of a failure of the LBT detection instance, the MAC layer may also trigger a radio link failure or indirectly Trigger connection re-establishment. The subsequent actions of the terminal device are the same as those defined in the current standard after a wireless link failure occurs, except for the trigger condition.
[0216]
For example, when the MAC layer receives the above indication, it considers that random access has failed. If the random access occurs in a specific cell (referred to as the first cell), such as PCell or PSCell, the terminal device sends indication information to the network device ( It is called the first indication information), and the random access problem is indicated through the first indication information. Regarding the definition of the above-mentioned PCell and PSCell, reference can be made to existing standards, which are collectively referred to as "primary cells" herein.
[0217]
For another example, the MAC layer may also consider that the random access fails when the second condition is met. The second condition here is at least one of the aforementioned conditions 3 to 6, which will not be repeated here.
[0218]
Through the method of this embodiment, in the case of LBT monitoring failure, the terminal device can announce "wireless link failure" or "channel busy", thereby avoiding always being on a cell or a channel of a cell where LBT monitoring has always failed. Random access on the Internet. In this way, it can save energy for terminal equipment, avoid long-term business interruption, and provide a better user experience. This method is suitable for terminal equipment in a connected state.
[0219]
In step 402 of this embodiment, when receiving the indication of LBT monitoring failure from the physical layer or the indication of the current preamble transmission abandonment or the indication of the failure of the LBT detection instance, the RRC layer may also trigger radio link failure or trigger RRC The connection is rebuilt.
[0220]
For example, the RRC layer may initiate a connection re-establishment process when receiving the instruction, for example, send second instruction information to the network device, and trigger the RRC connection re-establishment through the second instruction information. The second indication information may include LBT monitoring failure information, and the specific form is not limited in this embodiment. The second indication information may be included in the RRC Reestablishment Request message (RRCReestablishmentRequest) to re-establish the RRC connection with the network, but this embodiment is not limited to this.
[0221]
For another example, the RRC layer can also initiate a connection re-establishment process when the third condition is met, triggering subsequent actions of the terminal device. As mentioned above, the third condition here can be at least one of the aforementioned conditions 3 to 6. I won't repeat them here.
[0222]
For another example, the RRC layer may consider that the wireless link fails after receiving the above indication, and trigger the terminal device to perform subsequent actions. The behavior of the terminal device after the wireless link failure in the existing standard may be referred to, and the description is omitted here.
[0223]
For another example, the RRC layer may also consider (or trigger) the radio link failure when the fourth condition is met, and trigger the subsequent behavior of the terminal device. The fourth condition here can be at least one of the aforementioned condition 3 to condition 6, which will not be repeated here.
[0224]
With the method of this embodiment, in the case that LBT monitoring fails or certain conditions (the third condition or the fourth condition) are met, the terminal device can initiate the RRC connection re-establishment process to the network side or consider that the radio link has failed, and select a new one. In the same cell or another channel on the same cell, it is avoided that random access is always performed on a cell or a channel of a cell that has always failed LBT monitoring. In this way, it can save energy for terminal equipment, avoid long-term business interruption, and provide a better user experience. This method is suitable for terminal equipment in a connected state.
[0225]
In step 402 of this embodiment, when receiving an indication of failure of LBT monitoring from the physical layer or indication of abandonment of current preamble transmission or indication of failure of LBT detection instance, the MAC layer of the terminal device may maintain the counter.
[0226]
In this embodiment, in the foregoing method, it is possible that all LBT monitoring fails, causing the transmission of the preamble to be abandoned, that is, the transmission of the preamble is not performed. In this case, if the ongoing random access is not stopped, it may be Cause problems with terminal equipment, for example, when the terminal equipment is in the connected state, random access attempts for a long time or even without end (random access selection, determination of random access resources, instructing the physical layer to send the preamble, the physical layer performs LBT monitoring, LBT monitoring fails, and random access selection is performed again after the RAR receiving window expires), which will cause business interruption, deterioration of user experience, and even power exhaustion.
[0227]
In order to solve the above problems, in this embodiment, a counter maintenance mechanism is also introduced.
[0228]
For example, for each RO that has performed LBT monitoring, if the LBT monitoring of the RO fails, the preamble transmission counter (such as PREAMBLE_TRANSMISSION_COUNTER) is increased by 1. Here, the LBT monitoring failure causes the transmission of the preamble to be abandoned, and the LBT monitoring failure will be described in the following embodiments.
[0229]
For another example, for each RO that has undergone LBT monitoring, if the RO's LBT monitoring fails and the RAR reception window expires, the transmission counter (such as PREAMBLE_TRANSMISSION_COUNTER) of the preamble is increased by 1. Here, the LBT monitoring failure causes the transmission of the preamble to be abandoned, and the LBT monitoring failure will be described in the following embodiments.
[0230]
Through the above mechanism, when the LBT monitoring fails, although the preamble transmission is not performed, the retransmission counter is still incremented by 1, which can limit the number of random access attempts, thereby reducing service interruption, improving user experience, and saving terminal power consumption.
[0231]
The above two mechanisms are only examples, and this embodiment is not limited to them.
[0232]
For another example, a new counter can be introduced. When the random access process is initiated, the counter is set to 1. In the case of LBT monitoring failure, the value of the counter is increased by 1 until the value of the counter reaches the maximum value. It is considered that the random access process is complete. Here, the completion of the random access procedure may be a successful completion or an unsuccessful completion.
[0233]
In this embodiment, "drop" can also be replaced by similar words such as "cancel" or "failed" or "interrupt" or "suspend", both Indicates that the RO indicated by the physical layer application failed and/or did not send the preamble to the network device.
[0234]
In this embodiment, the processing of the physical layer or the MAC layer or the RRC layer of the terminal device is described through different implementation manners. These implementation manners can be used alone or in combination, and this embodiment is not limited.
[0235]
Through the method of this embodiment, when one or more ROs are confirmed by the MAC layer, different processing mechanisms are provided when LBT monitoring fails, which shortens the response time after LBT monitoring fails, and improves the random access Success rate.
[0236]
Example 3
[0237]
This embodiment provides a configuration method, which is applied to a network device, which is a processing on the network side corresponding to the method in Embodiment 1 and Embodiment 2, wherein the same content as in Embodiment 1 and Embodiment 2 will not be repeated Description. FIG. 5 is a schematic diagram of the configuration method of this embodiment. As shown in FIG. 5, the method includes:
[0238]
Step 501: A network device configures multiple initial BWPs for a terminal device in an idle state or an active state, and the terminal device determines an RO on each of the initial BWPs.
[0239]
In this embodiment, the network device configures multiple initial BWPs for the terminal device, and the terminal device can determine an RO on each initial BWP. The specific method is as described in Embodiment 1, and will not be repeated here. Through this method, the transmission opportunity of the preamble is increased, and the success rate of random access is improved.
[0240]
In this embodiment, as described in Embodiment 2, the network device may also receive the first indication information sent by the terminal device, and confirm that the activated BWP is the BWP that transmits the first indication information according to the first indication information. The subsequent processing may be It is the same as the existing standard, so the description is omitted here.
[0241]
Through the method of this embodiment, the success rate of random access is improved.
[0242]
Example 4
[0243]
This embodiment provides a random access preamble sending device, which is configured in terminal equipment. Since the principle of the device to solve the problem is similar to the method in embodiment 1, the specific implementation can refer to embodiment 1, and the content is the same. The description will not be repeated.
[0244]
FIG. 6 is a schematic diagram of the random access preamble sending apparatus of this embodiment. As shown in FIG. 6, the random access preamble sending apparatus 600 of this embodiment includes: a first determining unit 601 and a second unit 602.
[0245]
The first determining unit 601 determines the first number of random access transmission opportunities (RO) used to send the preamble at the media access control (MAC) layer of the terminal device or selects related to the RO used to send the preamble. The second determining unit 602 determines a second number of ROs at the physical layer of the terminal device according to the first number of ROs or the downlink reference signal, the first number and the second number Both are greater than 1.
[0246]
In this embodiment, the first determining unit 601 may determine the first number of ROs according to at least one of the following methods:
[0247]
The MAC layer of the terminal device selects a third number of synchronization signals/broadcast channel blocks (SSB) and/or channel state information reference signals (CSI-RS), and determines an RO corresponding to each selected SSB and/or CSI-RS , To obtain the first number of RO;
[0248]
The MAC layer of the terminal device selects one SSB or CSI-RS, and determines the first number of ROs associated with the selected SSB or CSI-RS;
[0249]
If the terminal device is in an idle state or an inactive state, the terminal device is configured with a first number of initial bandwidth parts (BWP), and an RO is determined on each initial BWP;
[0250]
If the terminal device is in the connected state, the terminal device determines an RO on each configured BWP;
[0251]
The MAC layer of the terminal device respectively determines an RO on the first number of aggregated carriers;
[0252]
The terminal device determines an RO for each random access process;
[0253]
The terminal device determines an RO on each activated BWP.
[0254]
In this embodiment, as shown in FIG. 6, the apparatus 600 may further include:
[0255]
The third determining unit 603 determines the RO for listening before speaking (LBT) monitoring at the physical layer of the terminal device according to at least one of the following methods:
[0256]
Perform LBT monitoring on the second number of ROs;
[0257]
Select some ROs from the second number of ROs for LBT monitoring;
[0258]
LBT monitoring is performed on the second number of ROs in a chronological order until the first condition is met, and the first condition is: the fourth number of LBT is successful or the LBT monitoring is performed on all the second number of ROs.
[0259]
In this embodiment, as shown in FIG. 6, the apparatus 600 may further include:
[0260]
The starting unit 604 starts a random access response (RAR) receiving window according to the first number of ROs or the second number of ROs.
[0261]
In this embodiment, the receiving window of the RAR may be one, and the RO for starting the receiving window of the RAR may be any of the following:
[0262]
If the physical layer of the terminal device only transmits the preamble on one RO, the RO that starts the receiving window of the RAR is the RO that transmits the preamble;
[0263]
If the physical layer of the terminal device transmits the preamble on multiple ROs, the RO that starts the receiving window of the RAR is the first or last RO among the multiple ROs;
[0264]
If the LBT monitoring of only one RO succeeds, the RO that starts the receiving window of the RAR is the RO that successfully LBT monitoring;
[0265]
If the LBT monitoring of multiple ROs is successful, the RO that initiates the receiving window of the RAR is the first or last RO among the ROs whose LBT monitoring is successful;
[0266]
If only one RO has performed LBT monitoring, the RO that initiates the receiving window of the RAR is the RO that performed LBT monitoring;
[0267]
If multiple ROs have performed LBT monitoring, the RO that initiates the receiving window of the RAR is the first or last RO among the ROs that have performed LBT monitoring;
[0268]
If the MAC layer of the terminal device determines an RO, the RO that starts the receiving window of the RAR is the RO determined by the MAC layer of the terminal device;
[0269]
If the MAC layer of the terminal device determines multiple ROs, the RO that starts the receiving window of the RAR is the first or last RO among the ROs determined by the MAC layer of the terminal device.
[0270]
In this embodiment, the receiving window of the RAR may be multiple, and the RO for starting the receiving window of the RAR may be any of the following:
[0271]
If the physical layer of the terminal device transmits the preamble on multiple ROs, the terminal device starts a RAR receiving window on each or each group of ROs that have transmitted the preamble. In the case that a RAR receiving window is started on the group RO, the RO that starts the receiving window of the RAR is the first or last RO of the multiple ROs that have transmitted the preamble;
[0272]
If the LBT monitoring of multiple ROs is successful, the terminal device starts a RAR receiving window on each or each group of ROs whose LBT monitoring is successful, and in the case of starting a RAR receiving window on each group of ROs, starts all The RO of the receiving window of the RAR is the first or last RO of the multiple ROs successfully monitored by the LBT;
[0273]
If multiple ROs have performed LBT monitoring, the terminal device starts one RAR receiving window on each or each group of ROs that have performed LBT monitoring, and starts one RAR receiving window on each group of ROs. The RO of the receiving window of the RAR is the first or last RO of the multiple ROs that have undergone LBT monitoring;
[0274]
If the MAC layer of the terminal device determines multiple ROs, the terminal device starts a RAR receiving window on each RO determined by the MAC layer of the terminal device or each group, and starts receiving the RAR The RO of the window is the first or last RO of the multiple ROs determined by the MAC layer of the terminal device.
[0275]
In this embodiment, the RO corresponding to each SSB or CSI-RS is a group, or the RO on each channel or BWP is a group, or the RO on each cell is a group.
[0276]
Through the device of this embodiment, the success rate of random access is improved.
[0277]
Example 5
[0278]
This embodiment provides a processing device for LBT monitoring failure, which is configured in a terminal device. Since the principle of the device to solve the problem is similar to the method in embodiment 2, the specific implementation can refer to embodiment 2, and the content is no longer the same. Repeat the description.
[0279]
FIG. 7 is a schematic diagram of the processing device for LBT monitoring failure in this embodiment. As shown in FIG. 7, the processing device 700 for LBT monitoring failure in this embodiment includes: a monitoring unit 701 and a processing unit 702.
[0280]
The monitoring unit 701 performs LBT monitoring at the physical layer of the terminal device, and when it considers that the LBT monitoring fails, it indicates to the MAC layer or the RRC layer that the LBT monitoring fails or the random access preamble transmission is abandoned or the LBT monitoring instance fails; the processing unit 702 is in place The MAC layer or RRC layer of the terminal device performs at least one of the following processing according to the instruction: performing resource selection; triggering channel selection or BWP handover; triggering radio link failure; triggering RRC connection re-establishment; and performing counter maintenance.
[0281]
In this embodiment, the monitoring unit 701 may consider that the LBT monitoring fails when the physical layer of the terminal device satisfies at least one of the condition 1 to the condition 14 described in Embodiment 2.
[0282]
In this embodiment, as shown in FIG. 7, the apparatus 700 may further include:
[0283]
A providing unit 703, which provides the MAC layer with information on the channel or BWP where the LBT monitoring result fails at the physical layer of the terminal device, and/or provides the MAC layer with the information about the failed LBT monitoring result at the physical layer of the terminal device The index of the SSB and/or the resource identifier of the CSI-RS.
[0284]
In this embodiment, the processing unit 702 may trigger channel selection or BWP switching when the first condition is satisfied in the MAC layer of the terminal device according to the indication, and the first condition is the one described in Embodiment 2. At least one of Condition 3 to Condition 6.
[0285]
In this embodiment, as shown in FIG. 7, the apparatus 700 may further include:
[0286]
The receiving unit 704 is configured to receive, at the MAC layer of the terminal device, the information of the channel or the BWP of the failed LBT monitoring result provided by the physical layer.
[0287]
In this embodiment, the BWP includes multiple channels, and the LBT monitoring failure on the BWP means that the LBT monitoring of any channel of the BWP fails.
[0288]
In this embodiment, the processing unit 702 may also trigger a radio link failure at the MAC layer of the terminal device according to the indication, including:
[0289]
When the MAC layer receives the indication, it is considered that random access has failed, and when the random access occurs in the first cell, first indication information is sent to the network device, and random access is indicated through the first indication information Problem, where the first cell is the primary cell; or
[0290]
When the MAC layer considers that the random access fails when the second condition is satisfied according to the indication, the second condition is at least one of the condition three to the condition six described in Embodiment 2.
[0291]
In this embodiment, the processing unit 702 may also trigger RRC connection re-establishment at the RRC layer of the terminal device according to the indication, including:
[0292]
Initiate a connection re-establishment process when the RRC layer receives the instruction; or
[0293]
The RRC layer initiates the connection re-establishment process when the third condition is satisfied according to the indication, and the third condition is at least one of the condition three to the condition six described in Embodiment 2.
[0294]
In this embodiment, the processing unit 702 may also trigger a radio link failure at the RRC layer of the terminal device according to the indication, including:
[0295]
When the RRC layer receives the indication, it is considered that the radio link has failed; or
[0296]
When the RRC layer considers that the radio link fails when the fourth condition is satisfied according to the indication, the fourth condition is at least one of the foregoing condition 3 to condition 6.
[0297]
In this embodiment, the processing unit 702 may also perform counter maintenance at the MAC layer of the terminal device according to the instruction, including:
[0298]
The MAC layer of the terminal device performs counter maintenance according to any of the following mechanisms:
[0299]
For each RO that has undergone LBT monitoring, if the LBT monitoring of the RO fails, the transmission counter of the preamble is incremented by 1;
[0300]
For each RO that has performed LBT monitoring, if the LBT monitoring of the RO fails and the RAR reception window expires, the transmission counter of the preamble is increased by 1;
[0301]
When the LBT monitoring fails, the first counter is increased by 1 until the first counter reaches the maximum value.
[0302]
Through the device of this embodiment, the success rate of random access is improved.
[0303]
Example 6
[0304]
This embodiment also provides a configuration device, which is configured in a network device. Since the principle of the device to solve the problem is similar to the method in Embodiment 3, the specific implementation can refer to Embodiment 3, and the same content will not be repeated.
[0305]
FIG. 8 is a schematic diagram of the configuration device of this embodiment. As shown in FIG. 8, the configuration device 800 of this embodiment includes:
[0306]
The configuration unit 801 configures a plurality of initial BWPs for a terminal device in an idle state or an active state, and the terminal device determines an RO on each of the initial BWPs.
[0307]
In this embodiment, as shown in FIG. 8, the apparatus 800 may further include:
[0308]
The first receiving unit 802 receives the first indication information sent by the terminal device;
[0309]
The first processing unit 803 confirms, according to the first indication information, that the activated BWP is the BWP that transmits the first indication information.
[0310]
Through the device of this embodiment, the success rate of random access is improved.
[0311]
Example 7
[0312]
An embodiment of the present invention also provides a terminal device, where the terminal device includes the device described in Embodiment 4 or 5.
[0313]
Fig. 9 is a schematic diagram of a terminal device according to an embodiment of the present invention. As shown in FIG. 9, the terminal device 900 may include a central processing unit 901 and a memory 902; the memory 902 is coupled to the central processing unit 901. It is worth noting that this figure is exemplary; other types of structures can also be used to supplement or replace this structure to implement telecommunication functions or other functions.
[0314]
In one embodiment, the functions of the device described in embodiment 4 or 5 can be integrated into the central processing unit 901, and the central processing unit 901 realizes the functions of the device described in embodiment 4 or 5, which is related to embodiment 4 Or the functions of the device described in 5 are incorporated here, and will not be repeated here.
[0315]
In another embodiment, the device described in embodiment 4 or 5 can be configured separately from the central processing unit 901. For example, the device described in embodiment 4 or 5 can be configured as a chip connected to the central processing unit 901, through The control of the central processing unit 901 realizes the functions of the device described in the fourth or fifth embodiment.
[0316]
As shown in FIG. 9, the terminal device 900 may further include: a communication module 903, an input unit 904, an audio processing unit 905, a display 906, and a power supply 907. It should be noted that the terminal device 900 does not necessarily include all the components shown in FIG. 9; in addition, the terminal device 900 may also include components not shown in FIG. 9, and the prior art can be referred to.
[0317]
As shown in FIG. 9, the central processing unit 901 is sometimes called a controller or an operating control, and may include a microprocessor or other processor devices and/or logic devices. The central processing unit 901 receives input and controls various components of the terminal equipment 900. Operation of components.
[0318]
Wherein, the memory 902 may be, for example, one or more of a cache, a flash memory, a hard drive, a removable medium, a volatile memory, a non-volatile memory, or other suitable devices. The above information related to the configuration can be stored, and in addition, the program that executes the related information can be stored. And the central processing unit 901 can execute the program stored in the memory 902 to realize information storage or processing. The functions of other components are similar to the existing ones, so I won't repeat them here. The components of the terminal device 900 may be implemented by dedicated hardware, firmware, software, or a combination thereof, without departing from the scope of the present invention.
[0319]
Through the terminal device of this embodiment, the success rate of random access is improved.
[0320]
Example 8
[0321]
An embodiment of the present invention also provides a network device, where the network device includes the device described in Embodiment 6.
[0322]
FIG. 10 is a schematic diagram of an implementation manner 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 also stores information processing programs, which are executed 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.
[0323]
In one embodiment, the function of the device described in embodiment 6 can be integrated into the central processing unit 1001, and the central processing unit 1001 realizes the function of the device described in embodiment 6, which is related to the device described in embodiment 6 The functions of is incorporated here, so I won’t repeat them here.
[0324]
In another embodiment, the device described in the sixth embodiment can be configured separately from the central processing unit 1001. For example, the device described in the sixth embodiment can be a chip connected to the central processing unit 1001. Control to realize the function of the device described in the sixth embodiment.
[0325]
In addition, as shown in FIG. 10, the network device 1000 may further include: a transceiver 1003, an antenna 1004, etc.; wherein the functions of the above-mentioned components are similar to those of the prior art, and will not be repeated here. It is worth noting that the network device 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 the prior art can be referred to.
[0326]
Through the network equipment of this embodiment, the success rate of random access is improved.
[0327]
Example 9
[0328]
An embodiment of the present invention also provides a communication system, which includes a network device and a terminal device. The network device is, for example, the network device 1000 described in Embodiment 8, and the terminal device is, for example, the terminal device 900 described in Embodiment 7.
[0329]
In this embodiment, the terminal device is, for example, a UE served by gNB. In addition to the functions of the device described in Embodiment 4 or 5, it also includes the conventional composition and functions of the terminal device. As described in Embodiment 7, This will not be repeated here.
[0330]
In this embodiment, the network device may be, for example, the gNB in ​​NR. In addition to the functions of the device described in Embodiment 6, it also includes the regular composition and functions of the network device. As described in Embodiment 8, here No longer.
[0331]
Through the communication system of this embodiment, the success rate of random access is improved.
[0332]
The embodiment of the present invention also provides a computer-readable program, wherein when the program is executed in the terminal device, the program causes the computer to execute the method described in Embodiment 1 or 2 in the terminal device.
[0333]
An embodiment of the present invention also provides a storage medium storing a computer-readable program, wherein the computer-readable program enables a computer to execute the method described in Embodiment 1 or 2 in a terminal device.
[0334]
The embodiment of the present invention also provides a computer-readable program, wherein when the program is executed in the network device, the program causes the computer to execute the method described in Embodiment 3 in the network device.
[0335]
An embodiment of the present invention also provides a storage medium storing a computer-readable program, wherein the computer-readable program enables a computer to execute the method described in Embodiment 3 in a network device.
[0336]
The above devices and methods of the present invention can be implemented by hardware, or can be implemented by hardware combined with software. The present invention relates to such a computer-readable program, when the program is executed by a logic component, the logic component can realize the above-mentioned device or constituent component, or the logic component can realize the above-mentioned various methods Or steps. Logic components such as field programmable logic components, microprocessors, processors used in computers, etc. The present invention also relates to storage media for storing the above programs, such as hard disks, magnetic disks, optical disks, DVDs, flash memory, and the like.
[0337]
The method/device described in conjunction with the embodiments of the present invention may be directly embodied as hardware, a software module executed by a processor, or a combination of the two. For example, one or more of the functional block diagrams and/or one or more combinations of the functional block diagrams shown in the figure may correspond to each software module of the computer program flow, or may correspond to each hardware module. These software modules can respectively correspond to the steps shown in the figure. These hardware modules can be implemented, for example, by using a field programmable gate array (FPGA) to solidify these software modules.
[0338]
The software module can be located in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable disk, CD-ROM or any other form of storage medium known in the art. A storage medium may be coupled to the processor, so that the processor can read information from the storage medium and write information to the storage medium; or the storage medium may be a component of the processor. The processor and the storage medium may be located in the ASIC. The software module can be stored in the memory of the mobile terminal, or can be stored in a memory card that can be inserted into the mobile terminal. For example, if the device (such as a mobile terminal) uses a larger-capacity MEGA-SIM card or a large-capacity flash memory device, the software module can be stored in the MEGA-SIM card or a large-capacity flash memory device.
[0339]
One or more of the functional blocks and/or one or more combinations of the functional blocks described in the drawings can be implemented as general-purpose processors, digital signal processors (DSPs) for performing the functions described in the present invention. ), application specific integrated circuit (ASIC), field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component or any appropriate combination thereof. One or more of the functional blocks described in the drawings and/or one or more combinations of the functional blocks can also be implemented as a combination of computing devices, for example, a combination of a DSP and a microprocessor, or multiple micro-processing DSP, one or more microprocessors or any other device combined with DSP communication.
[0340]
The present invention has been described above in conjunction with specific embodiments, but it should be clear to those skilled in the art that these descriptions are all exemplary and do not limit the protection scope of the present invention. Those skilled in the art can make various variations and modifications to the present invention according to the spirit and principle of the present invention, and these variations and modifications are also within the scope of the present invention.
[0341]
Regarding the implementation including the above examples, the following supplementary notes are also disclosed:
[0342]
1. A processing device for LBT monitoring failure, which is configured in a terminal device, wherein the device includes:
[0343]
A monitoring unit, which performs LBT monitoring at the physical layer of the terminal device, and indicates to the MAC layer or the RRC layer that the LBT monitoring fails or the msg.3 transmission is abandoned or the LBT detection instance fails when the LBT monitoring fails;
[0344]
A processing unit, which performs at least one of the following processing at the MAC layer or the RRC layer of the terminal device according to the instruction:
[0345]
Perform resource selection;
[0346]
Trigger channel selection or BWP switching;
[0347]
Trigger wireless link failure;
[0348]
Trigger RRC connection re-establishment;
[0349]
Perform counter maintenance.
[0350]
2. The device according to appendix 1, wherein the monitoring unit considers that the LBT monitoring has failed when the physical layer of the terminal device meets at least one of the following conditions:
[0351]
One LBT monitoring result is busy;
[0352]
One or more LBT monitoring results of the msg.3 transmission opportunity indicated by the MAC layer of the terminal device are busy;
[0353]
For multiple LBT monitoring within a period of time, the LBT monitoring result is that the number of busy instances reaches the first number;
[0354]
For multiple LBT monitoring, the proportion of busy LBT monitoring results reached the first proportion;
[0355]
The LBT monitoring result is that the number of busy instances reaches the second number. During the timing of the first timer, the LBT monitoring result is that the number of idle instances does not reach the third number, wherein the first timer is in the LBT The monitoring result is that it is started when the number of busy instances reaches the second number;
[0356]
After the second timer expires, the number of instances whose LBT monitoring result is busy reaches the fourth number, where the second timer is started when the monitoring result of one LBT instance is busy;
[0357]
On a channel or BWP, for multiple LBT monitoring within a period of time, the LBT monitoring result is that the number of busy instances reaches the fifth number;
[0358]
On a channel or BWP, for multiple LBT monitoring, the proportion of LBT monitoring results that is busy reaches the second proportion;
[0359]
On a channel or BWP, the number of busy instances as a result of LBT monitoring reaches the sixth number, and the number of instances where the LBT monitoring result is idle does not reach the seventh number within the timing time of the third timer, where the third The timer is started when the number of busy instances of the LBT monitoring result reaches the sixth number;
[0360]
On a channel or BWP, after the fourth timer expires, the number of instances whose LBT monitoring result is busy reaches the eighth number, where the fourth timer is started when the monitoring result of an LBT instance is busy;
[0361]
For one SSB and/or CSI-RS, for multiple LBT monitoring within a period of time, the number of busy instances of the LBT monitoring result is the ninth number;
[0362]
For one SSB and/or CSI-RS, for multiple LBT monitoring, the proportion of LBT monitoring results that is busy reaches the third proportion;
[0363]
For an SSB and/or CSI-RS, the number of instances where the LBT monitoring result is busy reaches the tenth number, and the number of instances where the LBT monitoring result is idle does not reach the eleventh number within the time period of the fifth timer. Among them, The fifth timer is started when the number of busy instances as a result of the LBT monitoring reaches the tenth number;
[0364]
For one SSB and/or CSI-RS, after the sixth timer expires, the number of instances where the LBT monitoring result is busy reaches the twelfth number, where the sixth timer is when the monitoring result of one LBT instance is busy Started at the time.
[0365]
3. The device according to Supplement 2, wherein the device further includes:
[0366]
A providing unit that provides the MAC layer with information about the channel or BWP where the LBT monitoring result fails at the physical layer of the terminal device; and/or, at the physical layer of the terminal device, provides the MAC layer with the LBT monitoring result that fails The index of the SSB and/or the resource identifier of the CSI-RS.
[0367]
4. The apparatus according to Supplement 1, wherein the processing unit triggers channel selection or BWP switching when a first condition is satisfied in the MAC layer of the terminal device according to the indication, and the first condition is At least one of the following:
[0368]
On a channel or BWP, for multiple LBT monitoring within a period of time, the LBT monitoring result is that the number of busy instances reaches the fifth number;
[0369]
On a channel or BWP, for multiple LBT monitoring, the proportion of LBT monitoring results that is busy reaches the second proportion;
[0370]
On a channel or BWP, the number of busy instances as a result of LBT monitoring reaches the sixth number, and the number of instances where the LBT monitoring result is idle does not reach the seventh number within the timing time of the third timer, where the third The timer is started when the number of busy instances of the LBT monitoring result reaches the sixth number;
[0371]
On a channel or BWP, after the fourth timer expires, the number of instances where the LBT monitoring result is busy reaches the eighth number, where the fourth timer is started when the monitoring result of one LBT instance is busy.
[0372]
5. The device according to appendix 4, wherein the BWP includes multiple channels, and the LBT monitoring failure on the BWP means that the LBT monitoring of at least one channel of the BWP fails.
[0373]
6. The apparatus according to Supplement 1, wherein the processing unit triggers radio link failure at the MAC layer of the terminal device according to the indication, including:
[0374]
The MAC layer considers that random access has failed when receiving the instruction; or
[0375]
According to the indication, the MAC layer considers that random access has failed when a second condition is met, and the second condition is at least one of the following:
[0376]
For multiple LBT monitoring within a period of time, the LBT monitoring result is that the number of busy instances reaches the first number;
[0377]
For multiple LBT monitoring, the proportion of busy LBT monitoring results reached the first proportion;
[0378]
The LBT monitoring result is that the number of busy instances reaches the second number. During the timing of the first timer, the LBT monitoring result is that the number of idle instances does not reach the third number, wherein the first timer is in the LBT The monitoring result is that it is started when the number of busy instances reaches the second number;
[0379]
After the second timer expires, the number of instances whose LBT monitoring result is busy reaches the fourth number, where the second timer is started when the monitoring result of one LBT instance is busy.
[0380]
7. The apparatus according to appendix 1, wherein the processing unit triggers RRC connection re-establishment at the RRC layer of the terminal device according to the indication, including:
[0381]
Initiate the connection re-establishment process when the RRC layer receives the indicated instruction; or
[0382]
When the RRC layer initiates a connection re-establishment process when a third condition is met according to the indication, the third condition is at least one of the following:
[0383]
For multiple LBT monitoring within a period of time, the LBT monitoring result is that the number of busy instances reaches the first number;
[0384]
For multiple LBT monitoring, the proportion of busy LBT monitoring results reached the first proportion;
[0385]
The LBT monitoring result is that the number of busy instances reaches the second number. During the timing of the first timer, the LBT monitoring result is that the number of idle instances does not reach the third number, wherein the first timer is in the LBT The monitoring result is that it is started when the number of busy instances reaches the second number;
[0386]
After the second timer expires, the number of instances whose LBT monitoring result is busy reaches the fourth number, where the second timer is started when the monitoring result of one LBT instance is busy.
[0387]
8. The apparatus according to appendix 1, wherein the processing unit triggers a radio link failure at the RRC layer of the terminal device according to the indication, including:
[0388]
When the RRC layer receives the indication, it is considered that the radio link has failed; or
[0389]
When the RRC layer considers that the radio link fails when the fourth condition is satisfied according to the indication, the fourth condition is at least one of the following:
[0390]
For multiple LBT monitoring within a period of time, the LBT monitoring result is that the number of busy instances reaches the first number;
[0391]
For multiple LBT monitoring, the proportion of busy LBT monitoring results reached the first proportion;
[0392]
The LBT monitoring result is that the number of busy instances reaches the second number. During the timing of the first timer, the LBT monitoring result is that the number of idle instances does not reach the third number, wherein the first timer is in the LBT The monitoring result is that it is started when the number of busy instances reaches the second number;
[0393]
After the second timer expires, the number of instances whose LBT monitoring result is busy reaches the fourth number, where the second timer is started when the monitoring result of one LBT instance is busy.
[0394]
9. The apparatus according to appendix 1, wherein the processing unit performs counter maintenance at the MAC layer of the terminal device according to the instruction, including:
[0395]
The processing unit performs counter maintenance at the MAC layer of the terminal device according to any one of the following mechanisms:
[0396]
For each msg.3 transmission opportunity that undergoes LBT monitoring, if the LBT monitoring of the msg.3 transmission opportunity fails, the transmission counter of the random access preamble is incremented by 1;
[0397]
For each msg.3 transmission opportunity that has undergone LBT monitoring, if the LBT monitoring of the msg.3 transmission opportunity fails and the contention resolution timer expires, the transmission counter of the random access preamble is increased by 1;
[0398]
When the LBT monitoring fails, the first counter is increased by 1 until the first counter reaches the maximum value.
[0399]
10. A sending device of msg.3, configured in a terminal device, wherein the device includes:
[0400]
A first determining unit, which determines a first number of transmission opportunities for sending msg.3 at the media access control (MAC) layer of the terminal device;
[0401]
A second determining unit, which determines, at the physical layer of the terminal device, the second number of transmission opportunities for sending msg.3 according to the first number of transmission opportunities, the first number and the second number The number is greater than one.
[0402]
11. The device according to Supplement 10, wherein the device further comprises:
[0403]
A receiving unit, which receives configuration information sent by a network device, and obtains at least one transmission opportunity configured by the network device for the msg.3 according to the configuration information.
[0404]
12. The device according to Supplement 10, wherein the device further comprises:
[0405]
The third determining unit, which determines a transmission opportunity for listening before speaking (LBT) monitoring at the physical layer of the terminal device, includes at least one of the following:
[0406]
LBT monitoring is performed on all the second number of transmission opportunities;
[0407]
Selecting part of the transmission opportunities from the second number of transmission opportunities for LBT monitoring;
[0408]
LBT monitoring is performed on the second number of transmission opportunities in a chronological order until the first condition is satisfied, and the first condition is: the fourth number of LBTs succeed or the LBT monitoring is performed on all the second number of transmission opportunities.
[0409]
13. The device according to Supplement 10, wherein the device comprises:
[0410]
A starting unit that starts a contention resolution timer according to the first number of transmission opportunities or the second number of transmission opportunities.
[0411]
14. The device according to appendix 13, wherein the contention resolution timer is one, and the transmission opportunity for starting the contention resolution timer is any one of the following:
[0412]
If the physical layer of the terminal device only transmits msg.3 on one transmission opportunity, the transmission opportunity for starting the contention resolution timer is the transmission opportunity of the msg.3;
[0413]
If the physical layer of the terminal device performs msg.3 transmission on multiple transmission opportunities, the transmission opportunity that starts the contention resolution timer is the first or last transmission opportunity among the multiple transmission opportunities ；
[0414]
If the LBT monitoring with only one transmission opportunity succeeds, the transmission opportunity that starts the contention resolution timer is the transmission opportunity for LBT monitoring success;
[0415]
If the LBT monitoring of multiple transmission opportunities is successful, the transmission opportunity that starts the contention resolution timer is the first or last transmission opportunity among the transmission opportunities successfully monitored by the LBT;
[0416]
If there is only one transmission opportunity for LBT monitoring, the transmission opportunity that starts the contention resolution timer is the transmission opportunity for LBT monitoring;
[0417]
If multiple transmission opportunities have undergone LBT monitoring, the transmission opportunity that starts the contention resolution timer is the first or last transmission opportunity among the transmission opportunities that have undergone LBT monitoring;
[0418]
If the MAC layer of the terminal device determines a transmission opportunity, the transmission opportunity for starting the contention resolution timer is the transmission opportunity determined by the MAC layer of the terminal device;
[0419]
If the MAC layer of the terminal device determines multiple transmission opportunities, the transmission opportunity for starting the contention resolution timer is the first or last transmission opportunity among the transmission opportunities determined by the MAC layer of the terminal device.
[0420]
15. The device according to appendix 13, wherein there are multiple contention resolution timers, and the transmission opportunity for starting the contention resolution timer is any one of the following:
[0421]
If the physical layer of the terminal device transmits msg.3 on multiple transmission opportunities, the terminal device starts a RAR receiving window on each or every group of transmission opportunities that have transmitted the msg.3 , And in the case of starting a contention resolution timer for each group of transmission opportunities, the transmission opportunity that starts the receiving window of the RAR is the first or the last of the multiple transmission opportunities of the msg.3 Transmission opportunity
[0422]
If the LBT monitoring of multiple transmission opportunities is successful, the terminal device starts a RAR receiving window on each or each group of LBT monitoring successful transmission opportunities, and starts a contention resolution timer on each group of transmission opportunities Next, the transmission opportunity that starts the receiving window of the RAR is the first or the last transmission opportunity of the multiple transmission opportunities that are successfully monitored by LBT;
[0423]
If multiple transmission opportunities have undergone LBT monitoring, the terminal device starts a RAR receiving window on each or each group of transmission opportunities that have undergone LBT monitoring, and starts a contention resolution timer on each group of transmission opportunities In this case, the transmission opportunity that starts the receiving window of the RAR is the first or last transmission opportunity of the multiple transmission opportunities that have been monitored by LBT;
[0424]
If the MAC layer of the terminal device determines multiple transmission opportunities, the terminal device starts a RAR receiving window on each or group of transmission opportunities determined by the MAC layer of the terminal device, and starts the RAR The transmission opportunity of the receiving window is the first or last transmission opportunity of the multiple transmission opportunities determined by the MAC layer of the terminal device.
[0425]
16. The device according to Supplement 15, wherein the transmission opportunity corresponding to each SSB or CSI-RS is a group, or, the transmission opportunity on each channel or BWP is a group, or the transmission opportunity on each cell The transmission opportunity is a group.
[0426]
17. A configuration device configured in a network device, wherein the device includes:
[0427]
The configuration unit configures multiple initial BWPs for the terminal device in the idle state or the active state, and the terminal device determines a transmission opportunity for sending msg.3 on each of the initial BWPs.
[0428]
18. The device according to Supplement 17, wherein the device further comprises:
[0429]
The network device receives the first indication information sent by the terminal device;
[0430]
The network device confirms, according to the first indication information, that the activated BWP is the BWP that transmits the first indication information.
Claims
[Claim 1]
A device for processing LBT monitoring failure, which is configured in a terminal device, wherein the device includes: a monitoring unit that performs LBT monitoring on the physical layer of the terminal device, and indicates that the LBT monitoring fails to the MAC layer or the RRC layer when it is considered that the LBT monitoring fails Or the random access preamble transmission is abandoned or the LBT detection instance fails; a processing unit that performs at least one of the following processing at the MAC layer or the RRC layer of the terminal device according to the instruction: perform resource selection; trigger a channel Selection or BWP handover; Trigger radio link failure; Trigger RRC connection re-establishment; Perform counter maintenance.
[Claim 2]
The apparatus according to claim 1, wherein the monitoring unit considers that the LBT monitoring fails when the physical layer of the terminal device satisfies at least one of the following conditions: an LBT monitoring result is busy; for the terminal device One or more LBT monitoring results of the preamble transmission opportunity indicated by the MAC layer at one time are busy; for multiple LBT monitoring within a period of time, the number of instances where the LBT monitoring result is busy reaches the first number; for multiple LBT monitoring , The LBT monitoring result is that the proportion of busy instances has reached the first proportion; the LBT monitoring result is that the number of busy instances reaches the second number, and the number of instances whose LBT monitoring result is idle has not reached the third number within the time period of the first timer. Wherein, the first timer is started when the number of busy instances as a result of the LBT monitoring reaches the second number; after the second timer expires, the number of busy instances as a result of the LBT monitoring reaches the fourth number, where The second timer is started when the monitoring result of an LBT instance is busy; on a channel or BWP, for multiple LBT monitoring within a period of time, the LBT monitoring result is that the number of busy instances reaches the fifth number ; On a channel or BWP, for multiple LBT monitoring, the proportion of LBT monitoring results that is busy reaches the second proportion; on a channel or BWP, the number of instances where the LBT monitoring result is busy reaches the sixth number, at the third timing During the timing of the device, the LBT monitoring result is that the number of idle instances has not reached the seventh number, wherein the third timer is started when the LBT monitoring result is that the number of busy instances reaches the sixth number; On the channel or BWP, after the fourth timer expires, the number of instances where the LBT monitoring result is busy reaches the eighth number, where the fourth timer is started when the monitoring result of one LBT instance is busy; SSB and/or CSI-RS, for multiple LBT monitoring within a period of time, the number of LBT monitoring results is the ninth number of busy instances; for one SSB and/or CSI-RS, for multiple LBT monitoring, LBT monitoring results The proportion that is busy reaches the third proportion; for an SSB and/or CSI-RS, the number of instances whose LBT monitoring result is busy reaches the tenth number, and the number of instances whose LBT monitoring result is idle within the time period of the fifth timer The eleventh number is not reached, wherein the fifth timer is started when the number of busy instances as a result of the LBT monitoring reaches the tenth number;For one SSB and/or CSI-RS, after the sixth timer expires, the number of instances where the LBT monitoring result is busy reaches the twelfth number, where the sixth timer is when the monitoring result of one LBT instance is busy Started at the time.
[Claim 3]
The apparatus according to claim 2, wherein the apparatus further comprises: a providing unit, which provides the MAC layer at the physical layer of the terminal device with information on the channel or BWP for which the LBT monitoring result failed; and/or, The physical layer of the terminal device provides the MAC layer with the index of the SSB whose LBT monitoring result fails and/or the resource identifier of the CSI-RS.
[Claim 4]
The apparatus according to claim 1, wherein the processing unit triggers channel selection or BWP switching when a first condition is satisfied in the MAC layer of the terminal device according to the indication, and the first condition is at least the following One: On a channel or BWP, for multiple LBT monitoring within a period of time, the LBT monitoring result is that the number of busy instances reaches the fifth number; On a channel or BWP, for multiple LBT monitoring, the LBT monitoring result is The proportion of busy reaches the second proportion; On a channel or BWP, the number of instances where the LBT monitoring result is busy reaches the sixth number, and the number of instances where the LBT monitoring result is idle does not reach the seventh within the time period of the third timer The third timer is started when the number of instances where the LBT monitoring result is busy reaches the sixth number; on a channel or BWP, after the fourth timer expires, the LBT monitoring result is busy The number of instances of reaches the eighth number, where the fourth timer is started when the monitoring result of an LBT instance is busy.
[Claim 5]
The apparatus according to claim 4, wherein the BWP includes a plurality of channels, and the LBT monitoring failure on the BWP means that the LBT monitoring of at least one channel of the BWP fails.
[Claim 6]
The apparatus according to claim 1, wherein the processing unit triggers a radio link failure at the MAC layer of the terminal device according to the indication, comprising: deeming random access when the MAC layer receives the indication Failure; or the MAC layer considers that the random access fails when the second condition is satisfied according to the indication, the second condition is at least one of the following: For multiple LBT monitoring within a period of time, the LBT monitoring result The number of busy instances reaches the first number; for multiple LBT monitoring, the LBT monitoring result is that the proportion of busy instances reaches the first proportion; the LBT monitoring result is that the number of busy instances reaches the second number, within the time period of the first timer , The LBT monitoring result is that the number of idle instances does not reach the third number, wherein the first timer is started when the LBT monitoring result is that the number of busy instances reaches the second number; after the second timer expires , The number of instances whose LBT monitoring result is busy reaches the fourth number, wherein the second timer is started when the monitoring result of one LBT instance is busy.
[Claim 7]
The apparatus according to claim 1, wherein the processing unit triggers RRC connection re-establishment at the RRC layer of the terminal device according to the indication, comprising: initiating a connection re-establishment process when the RRC layer receives the indication; Or the RRC layer initiates the connection re-establishment process when the third condition is satisfied according to the indication, and the third condition is at least one of the following: For multiple LBT monitoring within a period of time, the LBT monitoring result is busy The number of instances reaches the first number; For multiple LBT monitoring, the proportion of the LBT monitoring results that are busy reaches the first proportion; the LBT monitoring result is that the number of busy instances reaches the second number, and the LBT monitoring is within the time period of the first timer The result is that the number of idle instances does not reach the third number, wherein the first timer is started when the number of busy instances as a result of the LBT monitoring reaches the second number; after the second timer expires, the LBT monitors As a result, the number of busy instances reaches the fourth number, wherein the second timer is started when the monitoring result of one LBT instance is busy.
[Claim 8]
The apparatus according to claim 1, wherein the processing unit triggers radio link failure at the RRC layer of the terminal device according to the indication, comprising: deeming that the radio link fails when the RRC layer receives the indication Failure; or the RRC layer considers that the radio link fails when the fourth condition is satisfied according to the indication, and the fourth condition is at least one of the following: For multiple LBT monitoring within a period of time, the LBT monitoring result The number of busy instances reaches the first number; for multiple LBT monitoring, the LBT monitoring result is that the proportion of busy instances reaches the first proportion; the LBT monitoring result is that the number of busy instances reaches the second number, within the time period of the first timer , The LBT monitoring result is that the number of idle instances does not reach the third number, wherein the first timer is started when the LBT monitoring result is that the number of busy instances reaches the second number; after the second timer expires , The number of instances whose LBT monitoring result is busy reaches the fourth number, wherein the second timer is started when the monitoring result of one LBT instance is busy.
[Claim 9]
The apparatus according to claim 1, wherein the processing unit performs counter maintenance on the MAC layer of the terminal device according to the instruction, comprising: performing counter maintenance on the MAC layer of the terminal device according to any one of the following mechanisms : For each RO that has performed LBT monitoring, if the LBT monitoring of the RO fails, the preamble transmission counter is incremented; For each RO that has performed LBT monitoring, if the LBT monitoring of the RO fails, and the RAR’s When the receiving window expires, the transmission counter of the preamble is increased by 1; when the LBT monitoring fails, the first counter is increased by 1 until the first counter reaches the maximum value.
[Claim 10]
A device for sending a random access preamble is configured in a terminal device, wherein the device includes: a first determining unit, which determines a first number of data used in the media access control (MAC) layer of the terminal device A random access transmission opportunity (RO) for sending a preamble or selecting a downlink reference signal related to the RO for sending a preamble; a second determining unit, which is based on the first physical layer of the terminal device The number of ROs or the downlink reference signal determines a second number of ROs, and both the first number and the second number are greater than one.
[Claim 11]
The apparatus according to claim 10, wherein the first determining unit determines the first number of ROs according to at least one of the following methods: the MAC layer of the terminal device selects a third number of synchronization signal/broadcast channel blocks ( SSB) and/or channel state information reference signal (CSI-RS), determine an RO based on each selected SSB and/or CSI-RS to obtain the first number of ROs; the MAC layer of the terminal device selects one SSB or CSI-RS, determine the first number of ROs associated with the selected SSB or CSI-RS; if the terminal device is in an idle state or in an inactive state, the terminal device is configured with the first number of initial bandwidth parts ( BWP), an RO is determined on each initial BWP; if the terminal device is in the connected state, the terminal device determines an RO on each configured BWP; the MAC layer of the terminal device is aggregated in the first number An RO is respectively determined on the carrier of each; the terminal device determines an RO for each random access process; the terminal device determines an RO on each activated BWP.
[Claim 12]
The apparatus according to claim 10, wherein the apparatus further comprises: a third determining unit, which determines the RO for listening before speaking (LBT) monitoring at the physical layer of the terminal device, comprising at least one of the following: Perform LBT monitoring on the second number of ROs; select some ROs from the second number of ROs for LBT monitoring; perform LBT monitoring on the second number of ROs in chronological order until the first condition is met, The first condition is: the fourth number of LBT is successful or all ROs of the second number have been LBT monitored.
[Claim 13]
The apparatus according to claim 10, wherein the apparatus further comprises: an initiating unit that initiates a random access response (RAR) receiving window according to the first number of ROs or the second number of ROs.
[Claim 14]
The apparatus according to claim 13, wherein the receiving window of the RAR is one, and the RO that starts the receiving window of the RAR is any one of the following: If the physical layer of the terminal device is performed on only one RO If the transmission of the preamble is performed, the RO that starts the receiving window of the RAR is the RO that transmits the preamble; if the physical layer of the terminal device transmits the preamble on multiple ROs, then the The RO of the receiving window of the RAR is the first or last RO among the multiple ROs; if the LBT monitoring of only one RO succeeds, the RO that starts the receiving window of the RAR is the RO whose LBT monitoring is successful; if more If the LBT monitoring of a RO is successful, the RO that starts the receiving window of the RAR is the first or last RO among the ROs that have successfully LBT monitoring; if only one RO has performed LBT monitoring, the RO that starts the receiving window of the RAR RO is the RO that has performed LBT monitoring; if multiple ROs have performed LBT monitoring, the RO that starts the receiving window of the RAR is the first or last RO among the ROs that have performed LBT monitoring; if the terminal device’s The MAC layer determines one RO, the RO that starts the receiving window of the RAR is the RO determined by the MAC layer of the terminal device; if the MAC layer of the terminal device determines multiple ROs, then the RAR is started to receive The RO of the window is the first or last RO among the ROs determined by the MAC layer of the terminal device.
[Claim 15]
The apparatus according to claim 13, wherein the receiving window of the RAR is multiple, and the RO that initiates the receiving window of the RAR is any one of the following: If the physical layer of the terminal device is on multiple ROs After the preamble is transmitted, the terminal device starts a RAR receiving window on each or each group of ROs that have transmitted the preamble, and starts a RAR receiving window on each group of ROs. The RO of the receiving window of the RAR is the first or last RO of the multiple ROs that have transmitted the preamble; if the LBT monitoring of the multiple ROs succeeds, the terminal device is in each or each group In the case that a RAR receiving window is started on the RO successfully monitored by LBT, and one RAR receiving window is started on each group of ROs, the RO that starts the receiving window of the RAR is the first of the multiple ROs successfully monitored by LBT. One or the last RO; if multiple ROs have performed LBT monitoring, the terminal device starts a RAR receiving window on each or each group of ROs that have performed LBT monitoring, and starts a RAR receiving window on each group of ROs In the case of window, the RO that starts the receiving window of the RAR is the first or last RO of the multiple ROs that have been monitored by LBT; if the MAC layer of the terminal device determines multiple ROs, then The terminal device starts a RAR receiving window on the RO determined by the MAC layer of each or each group of the terminal device, and the RO that starts the RAR receiving window is the multiple determined by the MAC layer of the terminal device. The first or last RO of an RO.
[Claim 16]
The apparatus according to claim 15, wherein the RO corresponding to each SSB or CSI-RS is a group, or the RO on each channel or BWP is a group, or the RO on each cell is a group .
[Claim 17]
A configuration device configured in a network device, wherein the device includes: a configuration unit that configures a plurality of initial BWPs for a terminal device in an idle state or an active state, and the terminal device determines an RO on each initial BWP.
[Claim 18]
The apparatus according to claim 17, wherein the apparatus further comprises: a first receiving unit that receives first instruction information sent by a terminal device; a first processing unit that confirms the activated BWP according to the first instruction information Is the BWP for transmitting the first indication information.