Method and device for determining transmission receiving point

Abstract

The embodiment of the present application discloses a method and apparatus for determining a transmission receiving point, the method comprising: a network device receives a first message from a terminal device, the first message is used to indicate that the terminal device has a beam failure and / or indicates candidate beam information, and determines a first TRP according to the first message, the first TRP being the TRP in which the beam failure has occurred among the N TRPs. In the present application, when a transmission beam fails during communication between a terminal device and N transmission receiving points, the network device can determine the transmission receiving point in which the transmission beam fails among the N transmission receiving points according to the first message, thereby solving the problem that the network device cannot determine the TRP in which the beam failure has occurred in the M-TRP scenario.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a method and device for determining a transmission reception point. Background Art

[0002] In order to solve the problem of narrow beams, NR also introduces the mechanism of beam failure recovery (BFR) or link recovery process. Due to the rapid change of the channel, the quality of the beam received by the terminal will fluctuate. When the terminal finds that the quality of the received beam is lower than a certain threshold and the frequency reaches the predetermined condition, the terminal's BFR process will be triggered.

[0003] The BFR process has been widely studied in Release 15 (R15), Release 16 (R16) and Release 17 (R17). The Release 15 protocol introduced the BFR process of the Special Cell (sPCell), which includes the Primary Cell (PCell) and the Primary Secondary Cell (PSCell), and implemented the BFR through the Random Access Channel (RACH) process; the Release 16 protocol introduced the BFR of the Secondary Cell (SCell), which implemented the BFR of the SCell through the SR-BFR and / or BFR-MAC-CE process; the Release 17 protocol introduced the BFR process in the multi-transmission and reception point (M-TRP) scenario, but when BFR occurs in the M-TRP scenario, the base station cannot determine which TRP is currently experiencing the BFR. Summary of the invention

[0004] The embodiments of the present application provide a method and apparatus for determining a transmission receiving point, which can solve the problem that a network device cannot determine the TRP where BFR occurs in an M-TRP scenario.

[0005] In a first aspect, an embodiment of the present application provides a method for determining a transmission reception point, which is applied to a network device, and the method includes:

[0006] Receiving a first message from a terminal device, where the first message is used to indicate that a beam failure has occurred in the terminal device and / or to indicate candidate beam information, where the terminal device communicates with N transmission reception points TRP, where N is a positive integer greater than 1;

[0007] A first TRP is determined based on the first message, where the first TRP is the TRP where beam failure occurs among the N TRPs.

[0008] In a second aspect, an embodiment of the present application provides a method for determining a transmission reception point, which is applied to a terminal device, and the method includes:

[0009] A first message is sent to a network device, where the first message is used by the network device to determine the first TRP where the terminal device has a beam failure, the terminal device communicates with N TRPs, the first TRP is the TRP where the beam failure occurs among the N TRPs, and N is a positive integer greater than 1.

[0010] In a third aspect, an embodiment of the present application provides a device for determining a transmission reception point, which is applied to a network device, and the device includes:

[0011] a transceiver unit, configured to receive a first message from a terminal device, wherein the first message is used to indicate a beam failure of the terminal device or to indicate candidate beam information, and the terminal device communicates with N TRPs, where N is a positive integer greater than 1;

[0012] A determination unit is used to determine a first TRP based on the first message, where the first TRP is the TRP where beam failure occurs among the N TRPs.

[0013] In a fourth aspect, an embodiment of the present application provides a device for determining a transmission reception point, which is applied to a terminal device, and the device includes:

[0014] A transceiver unit is used to send a first message to a network device, wherein the first message is used by the network device to determine the first TRP where the terminal device has a beam failure, the terminal device communicates with N TRPs, the first TRP is the TRP where the beam failure occurs among the N TRPs, and N is a positive integer greater than 1.

[0015] In a fifth aspect, an embodiment of the present application provides a network device, comprising a processor, a memory, a communication interface, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the processor, and the program includes instructions for executing some or all of the steps described in the method described in the first aspect above.

[0016] In a sixth aspect, an embodiment of the present application provides a terminal device, comprising a processor, a memory, a communication interface, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the processor, and the program comprises instructions for executing some or all of the steps described in the method described in the second aspect above.

[0017] In the seventh aspect, an embodiment of the present application provides a computer-readable storage medium, which stores a computer program for electronic data exchange, wherein the computer program enables a computer to execute some or all of the steps described in the method described in the first aspect or the second aspect above.

[0018] In an eighth aspect, an embodiment of the present application provides a computer program product, wherein the computer program product includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to cause a computer to execute some or all of the steps described in the method described in the first aspect or the second aspect of the embodiment of the present application. The computer program product may be a software installation package.

[0019] It can be seen that in an embodiment of the present application, the network device receives a first message from a terminal device, wherein the first message is used to indicate that a beam failure has occurred in the terminal device and / or to indicate candidate beam information, and determines a first TRP according to the first message, wherein the first TRP is the TRP in which the beam failure has occurred among the N TRPs. In the present application, when a beam transmission fails during communication between a terminal device and N transmission receiving points, the network device can determine the transmission receiving point in which the beam transmission has failed among the N transmission receiving points according to the first message, thereby solving the problem that the network device cannot determine the TRP in which the beam failure has occurred in the M-TRP scenario. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 is a schematic diagram of the architecture of a wireless communication system provided in an embodiment of the present application;

[0022] Figure 2 It is a flowchart of a method for determining a transmission reception point provided in an embodiment of the present application;

[0023] Figure 3AIt is a schematic diagram of a SSB and RO resource mapping relationship provided in an embodiment of the present application;

[0024] Figure 3B It is a schematic diagram of a mapping relationship between CSI-RS resources and RO resources provided in an embodiment of the present application;

[0025] Figure 3C It is a schematic diagram of another SSB and RO resource mapping relationship provided in an embodiment of the present application;

[0026] Figure 4A It is a schematic diagram of dividing RO resources provided in an embodiment of the present application;

[0027] Figure 4B is a schematic diagram of another method of dividing RO resources provided in an embodiment of the present application;

[0028] Figure 5 A block diagram of the functional units of a device for determining a transmission reception point provided in an embodiment of the present application;

[0029] Figure 6 It is a structural diagram of a computer device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0030] The technical solution in this application will be described below in conjunction with the accompanying drawings.

[0031] It should be understood that the technical solutions provided in the embodiments of the present application can be applied to various communication systems, such as: Long Term Evolution (LTE) system, 5G communication system (such as New Radio (NR)), the 5G mobile communication system includes a non-standalone (NSA) 5G mobile communication system and / or a standalone (SA) 5G mobile communication system. The technical solutions provided in the present application can also be applied to communication systems that integrate multiple communication technologies (such as communication systems that integrate LTE technology and NR technology), or to various new communication systems in the future, such as 6G communication systems, 7G communication systems, etc., which are not limited in the embodiments of the present application. The technical solutions of the embodiments of the present application are also applicable to different network architectures, including but not limited to relay network architectures, dual-link architectures, vehicle-to-everything communication architectures, and the like.

[0032] The network device involved in the embodiments of the present application may be a base station (BS), which may also be referred to as a base station device, and is a device deployed in a wireless access network to provide wireless communication functions. For example, the device providing the base station function in a 2G network includes a base transceiver station (BTS) and a base station controller (BSC), the device providing the base station function in a 3G network includes a node B (NodeB) and a radio network controller (RNC), the device providing the base station function in a 4G network includes an evolved node B (evolved NodeB, eNB), in a wireless local area network (WLAN), the device providing the base station function is an access point (AP), the device providing the base station function in a 5G new radio (NR) includes a further evolved node B (gNB), and the device providing the base station function in a future new communication system, etc.

[0033] The embodiments of the present application relate to a terminal device including a device with a wireless communication function, and the terminal device may be a mobile phone, a tablet computer, a computer with a wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical, a wireless terminal in a smart grid, a wireless terminal in a smart home, etc. The terminal device may also be a handheld device with a wireless communication function, a vehicle-mounted device, a wearable device, a computer device or other processing device connected to a wireless modem, a terminal device in a future 5G network, or a terminal device in a future evolved public land mobile communication network (Public Land Mobile Network, referred to as PLMN), etc. In different networks, terminal devices may be called different names, such as: user equipment, access terminal, user unit, user station, mobile station, mobile station (Mobile Station, MS), remote station, remote terminal, mobile device, user terminal, terminal, wireless communication equipment, user agent or user device, cellular phone, cordless phone, Session Initiation Protocol (Session Initiation Protocol, SIP) phone, Wireless Local Loop (Wireless Local Loop, WLL) station, Personal Digital Assistant (Personal Digital Assistant, PDA), 5G network or terminal equipment in future evolution network, etc. The embodiments of the present application are not limited to this.

[0034] See also Figure 1 , Figure 1 Schematic diagram of a wireless communication system proposed in an embodiment of the present application. Figure 1 As shown, the wireless communication system may include a terminal device and a network device. The network device may include multiple transmission reception points (TRPs). The multiple TRPs may form a hyper cell. The TRPs within the hyper cell share a same cell ID (Hyper cell ID). Each TRP may communicate with the terminal device, and the terminal device may communicate with multiple TRPs at the same time.

[0035] The embodiment of the present application defines a unidirectional communication link from a network device to a terminal device as a downlink (DL), data transmitted on the downlink is downlink data, and the transmission direction of the downlink data is called the downlink direction; and a unidirectional communication link from a terminal device to a network device as an uplink (UL), data transmitted on the uplink is uplink data, and the transmission direction of the uplink data is called the uplink direction.

[0036] It should be understood that the "at least one" involved in the embodiments of the present application refers to one or more, and "plurality" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: the existence of A alone, the existence of A and B at the same time, and the existence of B alone, where A and B can be singular or plural. The character " / " generally indicates that the previous and subsequent associated objects are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b, or c can represent: a, b, c, ab, ac, bc, or abc, where a, b, c can be single or multiple.

[0037] Furthermore, unless otherwise specified, ordinal numbers such as "first" and "second" mentioned in the embodiments of the present application are used to distinguish multiple objects, and are not used to limit the order, timing, priority or importance of multiple objects. For example, the first information and the second information are only used to distinguish different information, and do not indicate the difference in content, priority, sending order or importance of the two types of information.

[0038] The "network" and "system" in the embodiments of the present disclosure express the same concept, and the communication system is the communication network. The "connection" in the embodiments of the present disclosure refers to various connection methods such as direct connection or indirect connection, such as connecting different devices through a communication interface, without any limitation.

[0039] The NR Release 16 protocol supports transmission based on M-TRP, that is, it supports terminal devices to communicate with one or more TRPs at the same time. The Release 17 protocol introduces the BFR process in the M-TRP scenario, that is, when a beam failure occurs with a certain TRP during the communication between the terminal device and multiple TRPs, the BFR process is supported. However, when a beam failure occurs in the M-TRP scenario, the base station cannot determine which TRP the BFR is currently communicating with the terminal device based on the existing information.

[0040] In order to solve the above problems, the present application proposes a method for determining a transmission receiving point, wherein a network device receives a first message from a terminal device, wherein the first message is used to indicate that a beam failure has occurred in the terminal device and / or indicate candidate beam information, and determines a first TRP according to the first message, wherein the first TRP is the TRP where a beam failure has occurred among the N TRPs, thereby solving the problem that the network device cannot determine the TRP where a beam failure has occurred in the M-TRP scenario.

[0041] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0042] See also Figure 2 , Figure 2 A flow chart of a method for determining a transmission receiving point provided in an embodiment of the present application is applied to Figure 1 The communication system shown in FIG. Figure 2 As shown, the method for determining the transmission reception point includes the following steps:

[0043] S210. The terminal device sends a first message to the network device, where the first message is used to indicate that a beam failure has occurred in the terminal device or to indicate candidate beam information. The terminal device communicates with N transmission receiving points TRP, where N is a positive integer greater than 1.

[0044] In an embodiment of the present application, a terminal device can communicate with multiple TRPs at the same time. Due to rapid changes in the channel or movement of the terminal device, the quality of the beam received by the terminal device may fluctuate. When the terminal device finds that the quality of the received beam is lower than a certain threshold and the frequency of occurrence reaches a predetermined condition, the BFR process of the terminal device will be triggered. Specifically, when the terminal device finds that a beam failure has occurred, it can send a first message to the network device to indicate to the network device that the terminal device has experienced a beam failure and needs to retransmit data on the selected new beam.

[0045] It should be noted that the terminal device may be located in a primary cell (PCell), a secondary cell (SCell) or a special cell (Spcell). In multiple connections, the SpCell is the PCell of the Master Cell Group (MCG) or the Primary Secondary Cell (PSCell) of the Secondary Cell Group (SCG); in carrier aggregation and single connection, the SpCell is the PCell.

[0046] Optionally, the first message is PRACH, the time-frequency resources of the PRACH are the first physical random access channel transmission opportunity RO resources, M RO resources map one SSB or one CSI-RS resource, the M RO resources include the first RO resource, and M is a positive integer greater than 1.

[0047] Among them, when the terminal device is located in the PCell, when the terminal device measures that the quality of the current working beam channel is not good, it needs to initiate the BFR process, which is implemented through random access. Specifically, the terminal device selects a specific beam and re-finds a beam beam with channel quality that meets the requirements. Specifically, the terminal device selects a new available synchronization signal block (SSB) or channel state information reference signal (CSI-RS) resource. Different SSB or CSI-RS resources correspond to different beams.

[0048] Further, when a beam failure event is detected, the terminal device sends a beam failure recovery request to the network device through the Physical Random Access Channel (PRACH), and transmits the specific beam selected by the terminal device to the network device through the PRACH. The time-frequency resources of the PRACH transmission are called Physical Random Access Channel Transmission Occasion (PRACH Transmission Occasion), or PRACH occasion or RO resources, which are used to transmit preambles. There is an association between RO resources and certain downlink signals, such as SSB or CSI-RS resources. Therefore, according to the mapping relationship between the first RO resource and the SSB or CSI-RS resource, the SSB or CSI-RS resource associated with the first RO resource can be determined, thereby determining the corresponding TRP. The mapping relationship between SSB and RO resources can be one-to-many, that is, M can be 2, 4, 8, 16, 32, etc. The specific value of M can be configured by high-level signaling (it can be indicated by carrying ssb-perRACH-Occation in the high-level parameter BeamFailureRecoveryConfig). Figure 3A As shown, the number of SSBs being sent by the terminal device is 10, and the indexes of the 10 SSBs are {0, 1, 8, 9, 16, 17, 24, 25, 32, 33}, respectively. Each SSB maps 2 RO resources, that is, M = 2, the frequency division multiplexing RO resources are 2, a PRACH time slot includes 3 time domain RO resources, and a PRACH configuration period includes 2 PRACH time slots. The mapping relationship between CSI-RS resources and RO resources is one-to-many, that is, M can be 2, 4, 8, 16, 32, etc. The specific value of M can be configured by high-level signaling. Figure 3B As shown, msg1-FDM=4, indicating that there are 4 frequency domain PRACH occasions on a time domain PRACH occasion, a PRACH time slot includes 3 time domain RO resources, and a PRACH configuration period includes 2 PRACH time slots, ra_OccasionList={1,13,25,37}, indicating that the RO resource set bound to the CSI-RS resource index number that can be used to transmit PEACH is {1,13,25,37}.

[0049] In some examples, the first message is a PRACH, the time-frequency resources of the PRACH are first RO resources, the PRACH includes a first preamble code, the first RO resource maps L SSBs, and L is a positive integer.

[0050] The mapping relationship between SSB and RO resources can also be many-to-one or one-to-one, that is, L can be 2, 4, 8, 16, 32, etc. The specific value of L can be configured by high-level signaling. Figure 3C As shown, the number of SSBs being sent by the terminal device is 10, and the indexes of the 10 SSBs are {0, 1, 8, 9, 16, 17, 24, 25, 32, 33}, respectively. Every 2 SSBs are mapped to one RO resource, that is, L = 2, the frequency division multiplexing RO is 2, a PRACH time slot includes 3 time domain RO resources, and a PRACH configuration period includes 2 PRACH time slots. Since one RO resource can map multiple SSBs, it is impossible to directly determine the first TRP based on the first RO resource. The PRACH also needs to include the first preamble code, and the corresponding TRP can be determined based on the first preamble code.

[0051] Optionally, the first message is BFE-SR.

[0052] Among them, when the terminal device is located in the SCell, the BFR mechanism applied to the SCell is different from the BFR mechanism applied to the PCell. When the terminal device is configured to detect the beam failure of a certain SCell and detects the beam failure, the terminal device needs to send a media access layer control element (Medium Access Control Control Element, MAC CE) of the SCell beam failure to the base station. When the terminal device has no uplink transmission resources to transmit the MAC CE of the SCell beam failure, the terminal device needs to send a BFR scheduling request (Scheduling Request, SR) to the base station. In an embodiment of the present application, the scheduling request related to the beam failure recovery of the SCell is called BFRSR, which includes the BFR SR configuration of the SCell configured by the serving base station (that is, the base station that provides services to the terminal device and also the base station that manages the PCell and the SCell) in the uplink PCell, that is, the physical uplink control channel (Physical Uplink Control Channel, PUCCH) configuration. After receiving the scheduling request for the beam failure recovery of the SCell, the base station can send an uplink authorization to the terminal device so that the terminal device transmits the MAC CE of the secondary cell beam failure, or directly send a beam failure recovery response to adjust the beam serving the terminal device.

[0053] Optionally, the first message is a media access layer control element MAC CE, and the first message also includes q1 set information or TRP information.

[0054] When the terminal device detects a beam failure in a certain SCell, a MAC CE of beam failure related to the SCell is generated, and the terminal device can report the candidate beam and the corresponding L1-SINR through the MAC CE. The q1 set information can be an index of the candidate beam set.

[0055] S220: The network device receives a first message.

[0056] S230. The network device determines a first TRP based on the first message, where the first TRP is the TRP where beam failure occurs among the N TRPs.

[0057] In an embodiment of the present application, for the BFR process based on contention random access (CBRA), after the network device receives the first message, it can determine the TRP where the transmission beam failed based on the information carried in the first message, so that the network device can determine the TRP where the beam failure occurred in the preamble code stage, so as to adjust the beam serving the terminal device, thereby facilitating system beam management.

[0058] Optionally, the network device can identify the sequence number of the TRP where the beam failure occurs by receiving the RO resource where the PRACH is located. The TRP differentiation method can be applicable when one SSB or one CSI-RS resource maps one or more RO resources.

[0059] Optionally, the network device can identify the sequence number of the TRP where the beam failure occurs by receiving the preamble sequence where the PRACH is located. The TRP differentiation method can be applicable when multiple SSBs or multiple CSI-RS resources are mapped to one or more RO resources.

[0060] Optionally, the first message is a PRACH, the time-frequency resource of the PRACH is a first RO resource, and when M RO resources are mapped to one SSB or one CSI-RS resource, the determining the first transmission reception point TRP based on the first message includes:

[0061] The M RO resources are divided into N groups of RO resources; based on a first mapping relationship between the N groups of RO resources and the N TRPs, the first TRP corresponding to the first RO resource information is determined.

[0062] Among them, the high-level layer configures 1 / M (L1 parameter: SSB-per-rach-occasion) SSBs to associate with one RO resource (frequency domain) through the parameter ssb-perRACH-OccasionAndCB-PreamblesPerSSB. When one SSB maps M RO resources, that is, M>1, one SSB is mapped to M consecutive valid RO resources (frequency domain), and each RO resource corresponds to a preamble index. The sequence number set of the preabmle supported by each TRP is configured through high-level signaling, so that the first TRP can be determined according to the preamble index corresponding to the first RO resource.

[0063] Specifically, the RO resources corresponding to one SSB are divided, and each group of RO resources after the division corresponds to a TPR, so that the network device can determine which group of RO resources the first RO resource belongs to based on the mapping relationship between SSB, RO resources and TRP, and then determine the TRP corresponding to the first RO resource based on the first mapping relationship between the group of RO resources and TRP.

[0064] For example, the total number of TRPs is N, 1 SSB maps 8 RO resources, and the total number of TRPs is 2. Then the first to fourth RO resources correspond to one TRP, and the remaining RO resources correspond to another TRP.

[0065] For another example, the total number of TRPs is N, and one SSB maps M RO resources. Then the M RO resources are divided into N groups. Group includes Any RO resource in M / N, the following Group includes RO resources, the To round down, the To round up, each group of RO resources corresponds to one TRP.

[0066] Optionally, dividing the M RO resources into N groups of RO resources includes: dividing M / N adjacent RO resources among the M RO resources into one group of RO resources to obtain the N groups of RO resources, wherein each group of RO resources may correspond to one TRP.

[0067] Specifically, when M RO resources are mapped to one SSB, the consecutive adjacent RO resources can be mapped starting from the RO resource with the smallest index. Any RO resource in M / N is divided into a group, for example, Figure 4AAs shown in Table 1, the total number of TRPs is 2, and one SSB maps 4 RO resources. Starting from the RO resource index of 1, two RO resources that are consecutively adjacent in the frequency domain or consecutively adjacent in the sequence number are divided into a group, that is, the first half of the RO resources in each SSB correspond to TRP-1, and the second half of the RO resources correspond to TRP-2. Among them, the first RO resource can be the index of the RO resource, and the first mapping table relationship can be a mapping table of the index of the RO resource, the SSB index and the TRP index, as shown in Table 1. Figure 4A The mapping table between RO resources and TRP is as follows.

[0068] Table 1

[0069] RO-1 RO-2 RO-3 RO-4 RO-5 RO-6 RO-7 RO-8 RO-9 RO-10 RO-11 RO-12 SSB-1 SSB-1 SSB-1 SSB-1 SSB-2 SSB-2 SSB-2 SSB-2 SSB-3 SSB-3 SSB-3 SSB-3 TRP-1 TRP-1 TRP-2 TRP-2 TRP-1 TRP-1 TRP-2 TRP-2 TRP-1 TRP-1 TRP-2 TRP-2

[0070] Specifically, when one CSI-RS resource is mapped to M RO resources, the RO resources can be mapped to the consecutive adjacent RO resources starting from the RO resource with the smallest index. Any RO resource in M / N is divided into a group, for example, Figure 3B As shown, the total number of TRPs is 2, one CSI-RS resource maps 4 RO resources, and the RO resource set bound by the CSI-RS resource index number that can be used to transmit PEACH is {1, 13, 25, 37}. Starting from the RO resource index of 1, RO resources 1 and RO resources 13 are grouped into one group, and RO resources 25 and RO resources 37 are grouped into another group, that is, the first half of the RO resources in the RO resource set correspond to TRP-1, and the second half of the RO resources correspond to TRP-2. Among them, the first RO resource can be the index of the RO resource, and the first mapping table relationship can be a mapping table of the index of the RO resource, the CSI-RS index and the TRP index, as shown in Table 2. Figure 3B The mapping table between RO resources and TRP is as follows.

[0071] Table 2

[0072]

[0073]

[0074] In a possible example, dividing the M RO resources into N groups of RO resources includes: dividing M / N RO resources with an RO resource interval of N-1 among the M RO resources into a group of RO resources to obtain the N groups of RO resources.

[0075] When the total number of TRPs is 2, when M RO resources are mapped to one SSB, all RO resource numbers are odd numbers or all odd-numbered RO resources correspond to TRP-1, and all RO resource numbers are even numbers or all even-numbered RO resources correspond to TRP-2; or, all RO resource numbers are odd numbers or all odd-numbered RO resources correspond to TRP-2, and all RO resource numbers are even numbers or all even-numbered RO resources correspond to TRP-1.

[0076] Specifically, when M RO resources are mapped to one SSB, the RO resources with an interval of N-1 can be mapped starting from the RO resource with the smallest index. Any RO resource in M / N is divided into a group, for example, Figure 4B As shown in Table 3, the total number of TRPs is 2, and one SSB maps 4 RO resources. Starting from the RO resource index of 1, the two RO resources with an interval of 1 in the frequency domain are divided into a group, that is, the RO resources with odd indexes in the SSB correspond to TRP-1, and the RO resources with even indexes in the SSB correspond to TRP-2. Among them, the first RO resource can be the index of the RO resource, and the first mapping table relationship can be a mapping table of the index of the RO resource and the TRP index, as shown in Table 3. Figure 4B The mapping table between RO resources and TRP is as follows.

[0077] Table 3

[0078] RO-1 RO-2 RO-3 RO-4 RO-5 RO-6 RO-7 RO-8 RO-9 RO-10 RO-11 RO-12 SSB-1 SSB-1 SSB-1 SSB-1 SSB-2 SSB-2 SSB-2 SSB-2 SSB-3 SSB-3 SSB-3 SSB-3 TRP-1 TRP-2 TRP-1 TRP-2 TRP-1 TRP-2 TRP-1 TRP-2 TRP-1 TRP-2 TRP-1 TRP-2

[0079] When the total number of TRPs is 2, when one CSI-RS resource maps M RO resources, all RO resource numbers are odd numbers or all odd-numbered RO resources correspond to TRP-1, and all RO resource numbers are even numbers or all even-numbered RO resources correspond to TRP-2; or, all RO resource numbers are odd numbers or all odd-numbered RO resources correspond to TRP-2, and all RO resource numbers are even numbers or all even-numbered RO resources correspond to TRP-1.

[0080] Specifically, when one CSI-RS resource is mapped to M RO resources, the RO resources can be concentrated with an interval of N-1, starting from the RO resource with the smallest index. M / N, Any of the RO resources is divided into a group, for example, Figure 3BAs shown, the total number of TRPs is 2, and one SSB maps 4 RO resources. Starting from the RO resource index of 1, RO resource 1 and RO resource 25 with an interval of 1 in the RO resource set are grouped into one group, and RO resource 13 and RO resource 37 are grouped into another group, that is, the RO resource index of the odd bit in the resource set corresponds to TRP-1, and the RO resource index of the even bit corresponds to TRP-2. Among them, the first RO resource can be an RO resource index, and the first mapping table relationship can be a mapping table of RO resource index, SSB index and TRP index, as shown in Table 4. Figure 3B The mapping table between RO resources and TRP is as follows.

[0081] Table 4

[0082] RO-1 RO-13 RO-25 RO-27 CSI-RS-1 CSI-RS-1 CSI-RS-1 CSI-RS-1 TRP-1 TRP-2 TRP-1 TRP-2

[0083] In a possible embodiment, the first message is a PRACH, the time-frequency resource of the PRACH is a first RO resource, and the PRACH includes a first preamble code;

[0084] In the case where the first RO resource maps L SSBs, L is a positive integer, and determining the first transmission receiving point TRP based on the first message includes: determining the first TRP corresponding to the first preamble code based on a second mapping relationship between the preamble code and the N TRPs.

[0085] Specifically, one SSB maps one or less than one RO resource, that is, when L>1 and M<1, when L SSBs map one RO resource, the TRP where the beam failure occurs can be directly determined according to the preamble index corresponding to the SSB. Therefore, the network device can determine the first TRP corresponding to the first preamble based on the second mapping relationship between the first preamble and N TRPs. The second mapping relationship can be configured by high-level signaling, that is, the sequence number set of preabmle supported by each TRP is configured by high-level signaling.

[0086] In a possible embodiment, the first message is BFR-SR, and BFR-SR is a PUCCH resource used to carry SR information of the BFR process; determining the first transmission receiving point TRP based on the first message includes: determining the first TRP based on a third mapping relationship between the BFR-SR and the TRP.

[0087] Among them, when the terminal device has no uplink transmission resources to transmit the MAC CE of the SCell beam failure, the terminal device needs to send a BFR-SR to the network through the physical uplink control channel (PUCCH) to request uplink resources. The different PUCCH resources occupied by the BFR-SR can correspond to different TRPs. The network device can determine the first TRP based on the third mapping relationship between the resource position of the received BFR-SR and the TRP. Among them, the third mapping relationship can be configured by high-level signaling, that is, the PUCCH resources supported by each TRP are configured by high-level signaling.

[0088] In a possible embodiment, the first message is a media access layer control element MAC CE, and the first message also includes q1 set information or TRP information; determining the first transmission receiving point TRP based on the first message includes: determining the first TRP based on a fourth mapping relationship between the q1 set information and the N TRPs, or the TRP information.

[0089] Among them, when a beam failure occurs in the SCell, the terminal device can perform beam failure recovery through MAC CE. MACCE can carry q1 set information or TRP information to inform the network device of the TRP where the beam failure occurs. The q1 set information can be the index of the candidate beam set. The indexes of the candidate beams of different TRPs are different. According to the fourth mapping relationship between the index of the candidate beam and the TRP, the TRP corresponding to the q1 set information can be determined. Among them, the fourth mapping relationship can be configured by high-level signaling, that is, the index of the candidate beam supported by each TRP is configured through high-level signaling.

[0090] It can be seen that in the method for determining the transmission receiving point proposed in the embodiment of the present application, the network device receives a first message from the terminal device, wherein the first message is used to indicate that the terminal device has a beam failure and / or indicates candidate beam information, and determines a first TRP according to the first message, wherein the first TRP is the TRP in which the beam failure has occurred among the N TRPs. In the present application, when a beam transmission fails during communication between the terminal device and N transmission receiving points, the network device can determine the transmission receiving point in which the beam transmission failed among the N transmission receiving points according to the first message, thereby solving the problem that the network device cannot determine the TRP in which the beam failure has occurred in the M-TRP scenario.

[0091] The above mainly introduces the scheme of the embodiment of the present application from the perspective of the execution process on the method side. It is understandable that, in order to realize the above functions, the electronic device includes a hardware structure and / or software module corresponding to the execution of each function. It should be easily appreciated by those skilled in the art that, in combination with the units and algorithm steps of each example described in the embodiments provided herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present application.

[0092] The embodiment of the present application can divide the electronic device into functional units according to the above method example. For example, each functional unit can be divided according to each function, or two or more functions can be integrated into one processing unit. The above integrated unit can be implemented in the form of hardware or in the form of software functional units. It should be noted that the division of units in the embodiment of the present application is schematic and is only a logical function division. There may be other division methods in actual implementation.

[0093] See also Figure 5 , Figure 5 It is a functional unit composition block diagram of a transmission receiving point determination device 500 provided in an embodiment of the present application. The transmission receiving point determination device 500 can be applied to a terminal device, and the transmission receiving point determination device 500 can be applied to a network device. The device 500 includes: a transceiver unit 510 and a determination unit 520.

[0094] In a possible implementation, the apparatus 500 is used to execute various processes and steps corresponding to the network in the above-mentioned method for determining the transmission reception point.

[0095] The transceiver unit 510 is configured to receive a first message from a terminal device, where the first message is used to indicate that a beam failure has occurred in the terminal device or to indicate candidate beam information, and the terminal device communicates with N TRPs, where N is a positive integer greater than 1;

[0096] The determination unit 520 is used to determine a first TRP based on the first message, where the first TRP is the TRP where beam failure occurs among the N TRPs.

[0097] Optionally, the first message is a physical random access channel PRACH, and the time-frequency resource of the PRACH is a first physical random access channel transmission opportunity RO resource; in the case where a synchronization signal / physical broadcast channel block SSB or a channel state indication reference signal CSI-RS resource M maps M RO resources, the M RO resources include the first RO resource, and M is a positive integer greater than 1, and the determining unit 520 is specifically used to: divide the M RO resources into N groups of RO resources;

[0098] Based on a first mapping relationship between the N groups of RO resources and the N TRPs, the first TRP corresponding to the first RO resource information is determined.

[0099] Optionally, in terms of dividing the M RO resources into N groups of RO resources, the determining unit 520 is specifically configured to:

[0100] M / N adjacent RO resources among the M RO resources are divided into a group of RO resources to obtain the N groups of RO resources; or, M / N RO resources with an RO resource interval of N-1 among the M RO resources are divided into a group of RO resources to obtain the N groups of RO resources.

[0101] Optionally, the first message is PRACH, the time-frequency resources of the PRACH are the first RO resources, and the PRACH includes a first preamble code; when the first RO resource maps L SSBs, L is a positive integer, and the determination unit 520 is specifically used to: determine the first TRP corresponding to the first preamble code based on the second mapping relationship between the preamble code and the N TRPs.

[0102] Optionally, the first message is BFE-SR; the determination unit 520 is specifically used to: determine the first TRP based on a third mapping relationship between the BFE-SR and the TRP.

[0103] Optionally, the first message is a media access layer control element MAC CE, and the MAC CE includes q1 set information or TRP information; the determination unit 520 is specifically used to determine the first TRP based on a fourth mapping relationship between the q1 set information and the N TRPs, or the TRP information.

[0104] In another possible implementation, the apparatus 500 is used to execute various processes and steps corresponding to the terminal device in the above-mentioned method for determining the transmission reception point.

[0105] The transceiver unit 510 is used to send a first message to a network device, where the first message is used by the network device to determine the first TRP where the terminal device has a beam failure. The terminal device communicates with N TRPs, where the first TRP is the TRP where the beam failure occurs among the N TRPs, and N is a positive integer greater than 1.

[0106] Optionally, the first message is PRACH, the time-frequency resources of the PRACH are the first physical random access channel transmission opportunity RO resources, M RO resources map one SSB or one CSI-RS resource, the M RO resources include the first RO resource, and M is a positive integer greater than 1.

[0107] Optionally, the first message is PRACH, the time-frequency resources of the PRACH are first RO resources, the PRACH includes a first preamble code, and the first RO resource maps L SSBs, where L is a positive integer.

[0108] Optionally, the first message is BFE-SR.

[0109] Optionally, the first message is a MAC CE, and the first MAC CE includes q1 set information or TRP information.

[0110] It can be understood that the functions of each program module of the transmission reception point determination device in the embodiment of the present application can be specifically implemented according to the method in the above method embodiment, and its specific implementation process can refer to the relevant description of the above method embodiment, which will not be repeated here.

[0111] It should be understood that the device 500 here is embodied in the form of a functional unit. The term "unit" here may refer to an application specific integrated circuit (ASIC), an electronic circuit, a processor (such as a shared processor, a proprietary processor or a group processor, etc.) and a memory for executing one or more software or firmware programs, a merged logic circuit and / or other suitable components that support the described functions. In an optional example, those skilled in the art can understand that the device 500 can be specifically the terminal device and the network device in the above-mentioned embodiment, and the device 500 can be used to execute the various processes and / or steps corresponding to the terminal device and the network device in the above-mentioned method embodiment. To avoid repetition, it will not be repeated here.

[0112] The apparatus 500 of each of the above schemes has the function of implementing the corresponding steps performed by the terminal device and the network device in the above method; the function can be implemented by hardware, or by hardware executing the corresponding software. The hardware or software includes one or more modules corresponding to the above functions; for example, the determination unit 520 can be replaced by a processor, and the transceiver unit 510 can be replaced by a transmitter and a receiver, respectively performing the transceiver operations and related processing operations in each method embodiment.

[0113] See also Figure 6 , Figure 6 A computer device provided by an embodiment of the present application includes: one or more processors, one or more memories, one or more communication interfaces, and one or more programs; the one or more programs are stored in the memories and are configured to be executed by the one or more processors;

[0114] In a possible implementation, the computer device is a network device, and the program includes instructions for executing the following steps:

[0115] Receiving a first message from a terminal device, where the first message is used to indicate that a beam failure has occurred in the terminal device and / or to indicate candidate beam information, where the terminal device communicates with N transmission reception points TRP, where N is a positive integer greater than 1;

[0116] A first TRP is determined based on the first message, where the first TRP is the TRP where beam failure occurs among the N TRPs.

[0117] Optionally, the first message is a physical random access channel PRACH, and the time-frequency resources of the PRACH are first physical random access channel transmission opportunity RO resources;

[0118] In the case where a synchronization signal / physical broadcast channel block SSB or a channel state indication reference signal CSI-RS resource M is mapped to M RO resources, the M RO resources include the first RO resource, and M is a positive integer greater than 1. In determining a first transmission reception point TRP based on the first message, the program includes instructions for further performing the following steps:

[0119] The M RO resources are divided into N groups of RO resources; based on a first mapping relationship between the N groups of RO resources and the N TRPs, the first TRP corresponding to the first RO resource information is determined.

[0120] Optionally, in terms of dividing the M RO resources into N groups of RO resources, the program includes instructions for further performing the following steps:

[0121] M / N adjacent RO resources among the M RO resources are divided into a group of RO resources to obtain the N groups of RO resources; or, M / N RO resources with an RO resource interval of N-1 among the M RO resources are divided into a group of RO resources to obtain the N groups of RO resources.

[0122] Optionally, the first message is a PRACH, the time-frequency resource of the PRACH is a first RO resource, and the PRACH includes a first preamble code; when the first RO resource maps L SSBs, L is a positive integer, and in terms of determining a first transmission reception point TRP based on the first message, the program includes instructions for further performing the following steps:

[0123] Based on a second mapping relationship between the preamble code and the N TRPs, determine the first TRP corresponding to the first preamble code.

[0124] Optionally, the first message is BFE-SR; in terms of determining the first transmission receiving point TRP based on the first message, the program includes instructions for performing the following steps: determining the first TRP based on a third mapping relationship between the BFR-SR and the TRP.

[0125] Optionally, the first message is a media access layer control element MAC CE, and the MAC CE includes q1 set information or TRP information;

[0126] In terms of determining the first transmission reception point TRP based on the first message, the program includes instructions for performing the following steps: determining the first TRP based on a fourth mapping relationship between the q1 set information and the N TRPs, or the TRP information.

[0127] In a possible implementation, the computer device is a terminal device, and the program includes instructions for executing the following steps:

[0128] A first message is sent to a network device, where the first message is used by the network device to determine the first TRP where the terminal device has a beam failure, the terminal device communicates with N TRPs, the first TRP is the TRP where the beam failure occurs among the N TRPs, and N is a positive integer greater than 1.

[0129] Optionally, the first message is PRACH, the time-frequency resources of the PRACH are the first physical random access channel transmission opportunity RO resources, M RO resources map one SSB or one CSI-RS resource, the M RO resources include the first RO resource, and M is a positive integer greater than 1.

[0130] Optionally, the first message is PRACH, the time-frequency resources of the PRACH are first RO resources, the PRACH includes a first preamble code, and the first RO resource maps L SSBs, where L is a positive integer.

[0131] Optionally, the first message is BFE-SR.

[0132] Optionally, the first message is a MAC CE, and the first MAC CE includes q1 set information or TRP information.

[0133] It should be noted that the specific implementation process of the embodiments of the present application can refer to the specific implementation process described in the above method embodiments, which will not be repeated here.

[0134] An embodiment of the present application also provides a computer storage medium, wherein the computer storage medium stores a computer program for electronic data exchange, and the computer program enables a computer to execute part or all of the steps of any method recorded in the above method embodiments.

[0135] The present application also provides a computer program product, which includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to cause a computer to execute some or all of the steps of any method described in the above method embodiment. The computer program product may be a software installation package.

[0136] It should be noted that, for the aforementioned method embodiments, for the sake of simplicity, they are all expressed as a series of action combinations, but those skilled in the art should be aware that the present application is not limited by the described order of actions, because according to the present application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present application.

[0137] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0138] In the several embodiments provided in the present application, it should be understood that the disclosed devices can be implemented in other ways. For example, the device embodiments described above are only schematic, such as the division of the above-mentioned units, which is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, and the indirect coupling or communication connection of devices or units can be electrical or other forms.

[0139] The units described above as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the embodiments of the present application.

[0140] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0141] If the above-mentioned integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable memory. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art or all or part of the technical solution, can be embodied in the form of a software product, which is stored in a memory and includes several instructions for a computer device (which can be a personal computer, server or TRP, etc.) to execute all or part of the steps of the various embodiments of the present application. The aforementioned memory includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, disk or optical disk and other media that can store program codes.

[0142] A person skilled in the art may understand that all or part of the steps in the various methods of the above embodiments may be completed by instructing the relevant hardware through a program, and the program may be stored in a computer-readable memory, which may include a flash drive, ROM, RAM, a magnetic disk or an optical disk, etc.

[0143] The embodiments of the present application are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. At the same time, for general technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A method for determining a transmission reception point, characterized in that: Applied to a network device, the method comprises: A first message sent by a receiving terminal device when there is no uplink transmission resource, the first message is used to indicate that a beam failure event occurs in the terminal device, the terminal device communicates with N transmission reception points TRP, and N is a positive integer greater than 1; the first message is a beam failure recovery BFR-SR; Receive second information from the terminal, where the second information is carried by MAC-CE and is used to indicate the TRP index number where beam failure occurred.

2. A method for determining a transmission reception point, characterized in that: Applied to a terminal device, the method comprises: When there are no uplink transmission resources, a first message is sent to a network device, where the first message is used to indicate that a beam failure event occurs in the terminal device, the terminal device communicates with N TRPs, the first TRP is a TRP in which a beam failure occurs among the N TRPs, and N is a positive integer greater than 1; the first message is a beam failure recovery BFR-SR; Send second information to the network device, where the second information is carried by MAC-CE and is used to indicate the TRP index number where beam failure occurred.

3. A device for determining a transmission reception point, characterized in that: Applied to network equipment, the device comprises: A transceiver unit, configured to receive a first message sent by a terminal device when there is no uplink transmission resource, wherein the first message is used to indicate that a beam failure event occurs in the terminal device, and the terminal device communicates with N TRPs, where N is a positive integer greater than 1; the first message is a beam failure recovery BFR-SR; Receive second information from the terminal, where the second information is carried by MAC-CE and is used to indicate the TRP index number where beam failure occurred.

4. A device for determining a transmission reception point, characterized in that: Applied to a terminal device, the device comprises: A transceiver unit, configured to send a first message to a network device when there are no uplink transmission resources, wherein the first message is used to indicate that a beam failure event occurs in the terminal device, the terminal device communicates with N TRPs, the first TRP is a TRP in which a beam failure occurs among the N TRPs, and N is a positive integer greater than 1; The transceiver unit is also used to send second information to the network device, where the second information is carried by MAC-CE and is used to indicate the TRP index number where the beam failure occurred.

5. A network device, characterized in that: The network device includes a processor, a memory, a communication interface, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the processor, and the programs include instructions for executing the steps in the method according to claim 1.

6. A terminal device, characterized in that: The terminal device includes a processor, a memory, a communication interface, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the processor, and the programs include instructions for executing the steps in the method as claimed in claim 2.

7. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program for electronic data exchange, wherein the computer program causes a computer to execute the steps of the method according to claim 1 or to execute the steps of the method according to claim 2.

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