Beam pairing method and device

Abstract

The invention relates to the technical field of sidelink communication, in particular to a beam pairing method and device. The beam pairing method is applied to a first terminal device, and comprises the following steps: determining a first resource position of an SSB; determining a second resource position of the CSI-RS according to the first resource position of the SSB; and sending a CSI-RS at the second resource position, wherein the CSI-RS is used for performing beam pairing with a second terminal device. According to the scheme of the embodiment of the invention, the resource position of the CSI-RS can be determined based on the resource position of the SSB in the beam pairing process, so that the technical problem of determining the resource position of the CSI-RS is solved.

Description

Technical Field

[0001] The present application relates to the field of sidelink communication technology, and in particular to a beam pairing method and device. Background Art

[0002] Sidelink communication refers to direct communication between terminal devices, such as communication between user equipment (UE), device to device (D2D), vehicle-to-everything (V2X), etc. When a terminal device initially establishes a sidelink with other terminal devices or during sidelink communication, beam pairing is involved. In the process of beam pairing, you can refer to CSI-RS (Channel State Information-Reference Signal). However, in the beam pairing process, how to determine the resource location of CSI-RS is a problem that needs to be solved. Summary of the invention

[0003] In view of this, an embodiment of the present invention provides a beam pairing method and device, which can determine the resource position of CSI-RS based on the resource position of SSB in the beam pairing process, thereby solving the technical problem of determining the resource position of CSI-RS.

[0004] In a first aspect, an embodiment of the present invention provides a beam pairing method, which is applied to a first terminal device and includes:

[0005] Determine the first resource location of the SSB;

[0006] Determining a second resource position of a CSI-RS according to the first resource position of the SSB;

[0007] A CSI-RS is sent at the second resource position, and the CSI-RS is used for beam pairing with the second terminal device.

[0008] In one possible implementation, determining the second resource position of the CSI-RS according to the first resource position of the SSB includes:

[0009] Determining a position offset of a CSI-RS relative to the first resource position;

[0010] A second resource position of a CSI-RS is determined according to the first resource position and the position offset.

[0011] In one possible implementation manner, the position offset is determined according to high-level signaling of a network device, or the position offset is determined according to a preconfiguration manner, or the position offset is a fixed position.

[0012] In one possible implementation, the first resource position includes: a first frequency domain position;

[0013] The first frequency domain position includes: one or more of: the RB position occupied by the SSB, the center frequency point position of the SSB bandwidth, and the total number of RBs occupied by the SSB;

[0014] The position offset comprises: an offset of the CSI-RS relative to one or more of the first frequency domain positions;

[0015] The second frequency domain position includes: one or more of: an RB position occupied by the CSI-RS, a center frequency point position of the CSI-RS bandwidth, and a total number of RBs occupied by the CSI-RS.

[0016] In one possible implementation, the first resource location includes: a first time domain location;

[0017] The first time domain position includes: one or more of the time domain period of the SSB, the time domain period offset, the number of SSBs in one time domain period, and the time domain interval between two adjacent SSBs;

[0018] The position offset includes: an offset of one or more of the first time domain positions of the CSI-RS relative to the SSB;

[0019] The second time domain position includes: one or more of the time domain period of the CSI, the time domain period offset, the number of SSBs in a time domain period, and the time domain interval between two adjacent SSBs.

[0020] In one possible implementation manner, the second time domain position and the first time domain position do not have the same time domain position.

[0021] In one possible implementation manner, the second time domain position and the first time domain position have the same time domain position; and the method further includes:

[0022] According to the signal priority configuration of CSI-RS and SSB, a signal with a higher priority is determined from CSI-RS and SSB;

[0023] In the same time domain of the second time domain position and the first time domain position, a signal with a high priority is sent and received.

[0024] In one possible implementation manner, determining the second resource position of the CSI-RS according to the first resource position and the position offset includes:

[0025] Determine the signal type of CSI-RS;

[0026] Determine a position offset that matches a signal type of the CSI-RS, where different types of CSI-RS correspond to different position offsets;

[0027] A second resource position of the CSI-RS is determined according to the first resource position and a position offset matching a signal type of the CSI-RS.

[0028] In one possible implementation manner, the signal type of the CSI-RS includes:

[0029] The beam directions of the CSI-RS in the CSI-RS resource set are the same;

[0030] The beam directions of the CSI-RS in the CSI-RS resource set are different types.

[0031] In one possible implementation manner, determining the second resource position of the CSI-RS according to the first resource position and the position offset includes:

[0032] Determine a service identifier of the first terminal device, where the first terminal device includes one or more service identifiers;

[0033] Determine a location offset that matches a service identifier of the first terminal device, wherein different service identifiers correspond to different location offsets;

[0034] The second resource position of the CSI-RS is determined according to the first resource position and a position offset that matches the service identifier of the first terminal device.

[0035] In one possible implementation manner, if the first terminal device includes multiple service identifiers, the determined second resource positions are multiple; and sending the CSI-RS at the second resource position includes:

[0036] The CSI-RS is sent respectively at the determined multiple second resource positions.

[0037] In one possible implementation, the time-frequency resources used by the first terminal device for service transmission are: the overall time-frequency resources configured by the first terminal device for side link communication minus the time-frequency resources used for sending CSI-RS.

[0038] In one possible implementation manner, after sending the CSI-RS at the second resource position, the method further includes:

[0039] A beam measurement report sent by the second terminal device is received in a first beam direction, where the first beam direction is the same as the beam direction in which the first terminal device sends the CSI-RS.

[0040] In one possible implementation manner, after sending the CSI-RS at the second resource position, the method further includes:

[0041] The beam measurement report sent by the second terminal device is received in multiple beam directions, where the multiple beam directions are determined according to high-level signaling of a network device, or according to a preset communication protocol, or are fixed directions.

[0042] In one possible implementation, the CSI-RS is an independent CSI-RS, and a time domain range and / or frequency domain range for sending the CSI-RS is preset; and the second resource position is within the preset time domain range and / or frequency domain range for sending the CSI-RS.

[0043] In one possible implementation, the CSI-RS is a non-independent CSI-RS, the frequency domain bandwidth of the second resource position is consistent with the bandwidth of the PSSCH; the time domain starting position of the second resource position is adjacent to the last time domain symbol of the PSSCH, or there is one or more interval symbols between the time domain starting position of the second resource position and the last time domain symbol of the PSSCH.

[0044] In one possible implementation, a beam used to send the CSI-RS satisfies one or more of the following conditions:

[0045] The beam directions of the CSI-RSs in the CSI-RS resource set to which the CSI-RS belongs are different;

[0046] The beam used to transmit CSI-RS is the same as the beam used to transmit PSSCH / PSCCH;

[0047] The beam used to transmit the CSI-RS is different from the beam used to transmit the PSSCH / PSCCH.

[0048] In a second aspect, an embodiment of the present invention provides a communication device, comprising: a processor and a memory, the memory being used to store a program; the processor being used to run the program to implement the beam pairing method as described in the first aspect or any one of the first aspects.

[0049] In one possible implementation manner, the communication device is a chip, or the communication device is a terminal device.

[0050] In a third aspect, an embodiment of the present invention provides a readable storage medium, wherein the readable storage medium stores a program. When the program is executed on a terminal device, the beam pairing method as described in the first aspect or any one of the first aspects is implemented.

[0051] The method of the embodiment of the present invention can determine the resource position of the CSI-RS by referring to the resource position of the SSB during the beam pairing process, thereby solving the problem of determining the CSI-RS resource position during the side link beam pairing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0053] Figure 1 A schematic diagram of a communication system provided by an embodiment of the present invention;

[0054] Figure 2 A flow chart of a beam pairing method provided by an embodiment of the present invention;

[0055] Figure 3 A flowchart of another beam pairing method provided by an embodiment of the present invention;

[0056] Figure 4 A schematic diagram of the time domain position of a CSI-RS and SSB provided in an embodiment of the present invention;

[0057] Figure 5 Another schematic diagram of the time domain position of CSI-RS and SSB provided in an embodiment of the present invention;

[0058] Figure 6 A flowchart of another beam pairing method provided by an embodiment of the present invention;

[0059] Figure 7 Another schematic diagram of the time domain position of CSI-RS and SSB provided in an embodiment of the present invention;

[0060] Figure 8 A flowchart of another beam pairing method provided by an embodiment of the present invention;

[0061] Fig. 9 A schematic diagram of the time domain position of another CSI-RS and SSB provided in an embodiment of the present invention;

[0062] Fig.10 A schematic diagram of the structure of a communication device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0063] In order to better understand the technical solution of the present application, the embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0064] It should be clear that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0065] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0066] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0067] See also Figure 1 , is a schematic diagram of a communication system provided by an embodiment of the present invention. Figure 1 As shown, the communication system includes a network device and multiple terminal devices. Optionally, the multiple terminal devices may include terminal device 1, terminal device 2, terminal device 3, etc. Optionally, the multiple terminal devices may be within the signal coverage range of the network device or outside the signal coverage range of the network device. Figure 1 As shown, terminal device 1 and terminal device 2 are within the signal coverage of the network device, and terminal device 1 and terminal device 2 can establish a communication connection with the network device. Terminal device 3 is outside the signal coverage of the network device, and it is difficult for terminal device 3 to establish a good communication connection with the network device. Figure 1The communication system shown supports direct communication between terminal devices, that is, the terminal devices can communicate with each other by directly establishing a side link without going through the network device. The communication device that establishes the side link can be a device within the coverage range of the network device signal or a device outside the coverage range of the network device signal. For example, side link communication can be established between terminal device 1 and terminal device 2 within the coverage range of the network device signal. Side link communication can be established between terminal device 1 within the coverage range of the network device signal and terminal device 3 outside the coverage range of the network device signal. Side link communication can also be established between terminal device 2 within the coverage range of the network device signal and terminal device 3 outside the coverage range of the network device signal.

[0068] The following first Figure 1 Some terms in the communication system are explained.

[0069] 1. Terminal equipment. In the embodiments of the present invention, the terminal equipment is a device with wireless transceiver functions, which can be referred to as a terminal, user equipment (UE), mobile station (MS), mobile terminal (MT), access terminal equipment, vehicle-mounted terminal equipment, industrial control terminal equipment, UE unit, UE station, mobile station, remote station, remote terminal equipment, mobile equipment, UE terminal equipment, wireless communication equipment, UE agent or UE device, etc. The terminal equipment can be fixed or mobile. It should be noted that the terminal equipment can support at least one wireless communication technology, such as long term evolution (LTE), new radio (NR), etc. For example, the terminal device may be a mobile phone, a tablet computer (pad), a desktop computer, a laptop computer, an all-in-one computer, a vehicle-mounted terminal, 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 surgery, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a wearable device, a terminal device in a future mobile communication network, or a terminal device in a future evolved public mobile land network (PLMN), etc.

[0070] In some embodiments, the terminal device may also be a device with transceiver functions, such as a chip system, wherein the chip system may include a chip and may also include other discrete devices.

[0071] 2. Network equipment. In the embodiment of the present invention, the network equipment is a device that provides wireless communication functions for terminal equipment, and can also be referred to as access network equipment, radio access network (RAN) equipment, etc. The network equipment can support at least one wireless communication technology, such as LTE, NR, etc. For example, the network equipment includes but is not limited to: the next generation base station (generation nodeB, gNB) in the fifth generation mobile communication system (5th-generation, 5G), evolved node B (evolved node B, eNB), radio network controller (radio network controller, RNC), node B (node ​​B, NB), base station controller (base station controller, BSC), base transceiver station (base transceiver station, BTS), home base station (for example, home evolved node B, or home node B, HNB), baseband unit (baseband unit, BBU), transmitting and receiving point (transmitting and receiving point, TRP), transmitting point (transmitting point, TP), mobile switching center, etc. The network device may also be a wireless controller, a centralized unit (CU), and / or a distributed unit (DU) in a cloud radio access network (CRAN) scenario, or the network device may be a relay station, an access point, a vehicle-mounted device, a terminal device, a wearable device, a network device in future mobile communications, or a network device in a future evolved PLMN, etc.

[0072] In some embodiments, the network device may also be a device that provides wireless communication functions for the terminal device, such as a chip system. For example, the chip system may include a chip and may also include other discrete devices.

[0073] 3. Sidelink. A sidelink refers to a link formed between terminal devices. A sidelink may include a transmitting terminal device and a receiving terminal device, wherein the transmitting terminal device may also be referred to as a Tx UE and the receiving terminal device may also be referred to as an Rx UE. It is understandable that any terminal device may serve as a transmitting terminal device and / or a receiving terminal device. For example, when a terminal device sends data, the terminal device may serve as a transmitting terminal device; when a terminal device receives data, the terminal device may serve as a receiving terminal device. When a terminal device sends and receives data at the same time, the terminal device serves as both a transmitting terminal device and a receiving terminal device. A transmitting terminal device may communicate with one or more receiving terminal devices.

[0074] 4. Channel State Information Reference Signal. The Channel State Information Reference Signal (CSI-RS) is used to measure channel quality. In the communication scenario between the terminal device and the network device, since the wireless signal conditions may change continuously, the terminal device needs to feed back the downlink channel conditions it sees to the network device through CSI, so that the network device can take the channel quality into consideration when scheduling downlink. In the communication scenario of the side link, beam pairing can be performed between terminal devices through CSI-RS. For example, when terminal device 1 and terminal device 2 initially establish a side link or during the communication process after the side link is established, terminal device 1 and terminal device 2 need to perform beam pairing. In the beam pairing process, the terminal device needs to determine the time-frequency resources for sending the CSI-RS. The following embodiments of the present invention will describe in detail the method for determining the time-frequency resources of the CSI-RS in the beam pairing process.

[0075] The high-level signaling mentioned in the present invention may be RRC, PC-RRC, MAC-CE, PC5 MAC-CE. The specific configuration method may be configuration from the network side to the terminal device, or mutual configuration between terminal devices.

[0076] In the embodiment of the present invention, CSI-RS resources may include two types, namely standalone CSI-RS resources and non-standalone CSI-RS resources.

[0077] Among them, independent CSI-RS resources refer to the absence of transmission of physical sidelink shared channel (PSSCH) and physical sidelink control channel (PSCCH) in the time slot for transmitting CSI-RS, or the transmission of PSCCH in the time slot for transmitting CSI-RS, or the PSSCH carrying MAC-CE or second-level sidelink control information (SCI) in the time slot for transmitting CSI-RS.

[0078] The non-independent CSI-RS resource refers to the time slot in which the CSI-RS is transmitted and the PSSCH and PSCCH are also transmitted.

[0079] See also Figure 2 , which is a flow chart of a beam pairing method provided in an embodiment of the present invention. The embodiment of the present invention takes a terminal device and a terminal device 2 as an example. The method can be applied in the scenario where the terminal device 1 and the terminal device 2 initially establish an edge link, and can also be applied in the scenario where the beam pairing needs to be performed again due to the change in the quality of the wireless signal after the terminal device 1 and the terminal device 2 successfully establish an edge link. The following is an example of the beam pairing process initiated by the terminal device 1. Figure 2 As shown, the processing steps of the method include:

[0080] 201. Terminal device 1 determines the first resource location of SSB.

[0081] The first resource position of the SSB may include a first frequency domain position and / or a first time domain position. Optionally, the first resource position of the SSB may be a known position.

[0082] 202. Terminal device 1 determines the second resource position of CSI-RS based on the first resource position of SSB.

[0083] The second resource position of the CSI-RS may include a second frequency domain position and / or a second time domain position.

[0084] In some embodiments, the second frequency domain position of the CSI-RS may be determined with reference to the first frequency domain position of the SSB, and accordingly, the second time domain position of the CSI-RS may not refer to the first time domain position of the SSB. For example, the second time domain position of the CSI-RS may be configured by high-level signaling of a network device, or may be determined based on a communication protocol preset by the terminal device 1, or the second time domain position of the CSI-RS is a preset fixed position.

[0085] In some embodiments, the second time domain position of the CSI-RS may be determined with reference to the first time domain position of the SSB, and accordingly, the second frequency domain position of the CSI-RS may not refer to the first frequency domain position of the SSB. For example, the second frequency domain position of the CSI-RS may be configured by high-level signaling of a network device, or may be determined based on a communication protocol preset by the terminal device 1, or the second frequency domain position of the CSI-RS may be a preset fixed position.

[0086] In some embodiments, the second time domain position of the CSI-RS may refer to the first time domain position of the SSB, that is, the second time domain position of the CSI-RS is determined based on the first time domain position of the SSB. In addition, the second frequency domain position of the CSI-RS refers to the first frequency domain position of the SSB, that is, the second frequency domain position of the CSI-RS is determined based on the first frequency domain position of the SSB.

[0087] 203. Terminal device 1 sends a CSI-RS at a second resource position to perform beam pairing with a second terminal device.

[0088] The method of the embodiment of the present invention can determine the resource position of the CSI-RS by referring to the resource position of the SSB during the beam pairing process, thereby solving the problem of determining the CSI-RS resource position during the side link beam pairing process.

[0089] See also Figure 3 , is a flowchart of another beam pairing method provided by an embodiment of the present invention. In an embodiment of the present invention, determining the second resource position of the CSI-RS according to the first resource position of the SSB includes: determining the position offset of the CSI-RS relative to the first resource position of the SSB, and determining the second resource position of the CSI-RS according to the first resource position of the SSB and the position offset. In some embodiments, the position offset of the CSI-RS relative to the first resource position of the SSB can be determined according to high-level signaling of a network device, or according to a pre-configuration method in a terminal device, or the position offset is a fixed position. In some embodiments, the position offset may include a position offset in the time domain. In some embodiments, the position offset may also include a position offset in the frequency domain. As Figure 3 As shown, the processing steps of the method include:

[0090] 301. Terminal device 1 determines a first frequency domain position and a first time domain position of an SSB.

[0091] 302. Terminal device 1 determines the position offset of the frequency domain position of the CSI-RS relative to the first frequency domain position of the SSB.

[0092] 303. Terminal device 1 determines the second frequency domain position of the CSI-RS according to the first frequency domain position of the SSB and the position offset of the CSI-RS relative to the first frequency domain position.

[0093] In some embodiments, the first frequency domain position of the SSB includes: one or more of the RB position occupied by the SSB, the center frequency point position of the SSB bandwidth, and the total number of RBs occupied by the SSB. The position offset of the frequency domain position of the CSI-RS relative to the first frequency domain position of the SSB includes: the offset of the CSI-RS relative to one or more of the first frequency domain positions. The second frequency domain position of the CSI-RS includes: one or more of the RB position occupied by the CSI-RS, the center frequency point position of the CSI-RS bandwidth, and the total number of RBs occupied by the CSI-RS.

[0094] In some embodiments, the second frequency domain position of the CSI-RS and the first frequency domain position of the SSB do not include the same frequency domain position.

[0095] 304. Terminal device 1 determines the position offset of the time domain position of the CSI-RS relative to the first time domain position of the SSB.

[0096] 305. Terminal device 1 determines the second time domain position of the CSI-RS according to the first time domain position of the SSB and the position offset of the CSI-RS relative to the first time domain position.

[0097] In some embodiments, the first time domain position of the SSB may include: one or more of the time domain period of the SSB, the time domain period offset, the number of SSBs in a time domain period, and the time domain interval between two adjacent SSBs. The position offset of the time domain position of the CSI-RS relative to the time domain position of the SSB includes: one or more of the offsets of the CSI-RS relative to the first time domain position of the SSB. Correspondingly, the second time domain position of the CSI-RS includes: one or more of the time domain period of the CSI-RS, the time domain period offset, the number of CSI-RSs in a time domain period, and the time domain interval between two adjacent CSI-RSs.

[0098] like Figure 4 As shown in , CSI-RS and SSB have the same time domain period, the same number of signals in one time domain period, and the time domain interval between two adjacent signals is the same. The difference is that CSI-RS and SSB have different time domain period offsets, such as Figure 4 As shown, the time domain period offset of SSB is Offset1, and the time domain period offset of CSI-RS is Offset2. In some embodiments, the position offset of CSI-RS relative to SSB is the offset of Offset2 relative to Offset1.

[0099] 306, terminal device 1 sends a CSI-RS on the time-frequency resources indicated by the second time domain position and the second frequency domain position, and the CSI-RS is used for beam pairing with terminal device 2.

[0100] In an embodiment of the present invention, the position offset of CSI-RS relative to SSB in time domain and frequency domain is set respectively, and then the time domain position and frequency domain position of CSI-RS are determined with reference to the time domain position and frequency domain position of SSB.

[0101] In some embodiments, based on the method of determining the time domain position of CSI-RS, CSI-RS and SSB may have the same or different time domain periods; or, CSI-RS and SSB have the same or different time domain period offsets; or, CSI-RS and SSB have the same or different number of signals in one time domain period; or, the time domain interval between two adjacent CSI-RSs is the same as or different from the time domain interval between two adjacent SSBs.

[0102] In some embodiments, there is no identical time domain position between the second time domain position of the CSI-RS and the first time domain position of the SSB, that is, the CSI-RS and the SSB occupy different time domain resources respectively.

[0103] In some embodiments, the second time domain position of CSI-RS and the first time domain position of SSB may also have the same time domain position. That is, CSI-RS and SSB may occupy the same time domain resources, that is, there may be resource collision between CSI-RS and SSB in the time domain. For example, at certain time domain positions, terminal device 1 needs to send CSI-RS and SSB at the same time; for example, at certain time domain positions, terminal device 1 needs to receive CSI-RS and SSB at the same time; for example, at certain time domain positions, terminal device 1 needs to receive and send CSI-RS and SSB respectively. Figure 5 As shown, CSI-RS and SSB have different time domain periods, different time domain period offsets, and the time domain intervals between two adjacent signals are also different. Figure 5 As shown, within a time domain period, the third CSI-RS signal and the third SSB signal have the same time domain position, that is, Figure 5 The third CSI-RS signal collides with the third SSB signal in the time domain.

[0104] When there is a resource collision between CSI-RS and SSB in the time domain, terminal device 1 can determine the signal with a higher priority from CSI-RS and SSB according to the signal priority configuration of CSI-RS and SSB. Afterwards, terminal device 1 can transmit and receive the signal with a higher priority at the same time domain position as the first time domain position in the second time domain position.

[0105] In some embodiments, the signal priority configuration can be determined based on high-level signaling of a network device, or the signal priority configuration can be determined based on a pre-configuration method in a preset communication protocol, or the signal priority configuration is a fixed configuration, that is, the priority of CSI-RS and SSB is a fixed value.

[0106] In some embodiments, for time domain positions where CSI-RS and SSB need to be sent simultaneously, for example, SSB priority can be set, or CSI-RS priority can be set. For another example, for time domain positions where CSI-RS and SSB need to be received simultaneously, SSB priority can be set, or CSI-RS priority can be set. For another example, for time domain positions where CSI-RS needs to be received simultaneously and SSB needs to be sent simultaneously, CSI-RS reception priority can be set, and of course SSB sending priority can also be set. For other possible priority setting methods, examples are not given one by one here.

[0107] In some specific examples, at time domain position 1, terminal device 1 needs to send CSI-RS and SSB at the same time, and CSI-RS has a higher priority, so terminal device 1 sends CSI-RS at time domain position 1. For another example, at time domain position 2, terminal device 1 needs to receive CSI-RS and SSB at the same time, and SSB has a higher priority, so terminal device 1 receives SSB at time domain position 2. For another example, at time domain position 3, terminal device 1 needs to send CSI-RS and receive SSB at the first time domain position. If sending CSI-RS has a higher priority, CSI-RS is sent at the first time domain position.

[0108] The method of the embodiment of the present invention, by setting the priority of CSI-RS and SSB, is conducive to making decisions on signal transmission and reception when time domain resource collision occurs between CSI-RS and SSB.

[0109] See also Figure 6 , is a flow chart of another beam pairing method provided by an embodiment of the present invention. Figure 6 As shown, the processing steps of the method include:

[0110] 401. Terminal device 1 determines the signal type of CSI-RS.

[0111] 402. Terminal device 1 determines a position offset that matches a signal type of the CSI-RS, wherein different types of CSI-RS correspond to different position offsets.

[0112] 403. Terminal device 1 determines the first resource location of SSB.

[0113] 404, the terminal device 1 determines the second resource position of the CS-RS according to the first resource position of the SSB and the position offset matching the CSI-RS signal type. The method of determining the second resource position of the CSI-RS according to the first resource position of the SSB and the position offset of the CSI-RS can be referred to Figure 2-Figure 5 The embodiments are described in detail and will not be repeated here.

[0114] 405 , terminal device 1 sends a CSI-RS at a second resource position, where the CSI-RS is used for beam pairing with terminal device 2 .

[0115] In an embodiment of the present invention, CSI-RS is divided into different signal types, and different signal types can match different position offsets, so that the time-frequency resources of CSI-RS can be determined based on the resource position of SSB and the position offset of CSI-RS.

[0116] In some embodiments, CSI-RS resources may also be referred to as CSI-RS for short. Several CSI-RSs may form a CSI-RS resource set. CSI-RSs may be classified according to whether the beam directions of the CSI-RSs in the CSI-RS resource set are the same. The classification types of CSI-RSs may include: a type in which the beam directions of the CSI-RSs in the CSI-RS resource set are the same, also known as a repetition on type; or a type in which the beam directions of the CSI-RSs in the CSI-RS resource set are different, also known as a repetition off type. Figure 7 As shown, the repetition on type and repetition off type CSI-RS correspond to their own position offsets. For example, the repetition on type and repetition off type CSI-RS have the same time domain period as the SSB, the number of signals in each period, and the signal interval are the same. The difference is that the time domain period offset of the SSB is Offset1, the time domain period offset of the repetition on type CSI-RS is Offset2, and the time domain period offset of the repetition off type CSI-RS is Offset3. When the CSI-RS to be sent is of the repetition on type, the resource position for sending the CSI-RS is determined according to Offset2; when the CSI-RS to be sent is of the repetition off type, the resource position for sending the CSI-RS is determined according to Offset3.

[0117] See also Figure 8 , is a flow chart of another beam pairing method provided by an embodiment of the present invention. Figure 8As shown, the processing steps of the method include:

[0118] 501, determine the service identifier of terminal device 1. Optionally, terminal device 1 has one or more service identifiers.

[0119] 502 , determine a location offset that matches the service identifier of terminal device 1 , where different service identifiers correspond to different location offsets.

[0120] 503, determine the first resource location of the SSB.

[0121] 504. Determine the second resource position of the CSI-RS based on the first resource position of the SSB and the position offset that matches the service identifier of the terminal device 1.

[0122] 505 , send a CSI-RS at the second resource position, where the CSI-RS is used for beam pairing with terminal device 2 .

[0123] like Fig. 9 As shown, the application layers of terminal device 1, terminal device 2, and terminal device 3 are respectively provided with different service identifiers, and different service identifiers correspond to different time domain period offsets in the time domain. Different time domain positions can be determined according to different time domain period offsets. When the terminal device initiates the beam pairing process, the terminal device can send CSI-RS at multiple time domain positions. Fig. 9 As shown, the terminal device 1 is provided with a service identifier 1 and a service identifier 3. When the terminal device 1 initiates the beam pairing process, the time domain period offset Offset-X1 and the period offset Offset-X3 are determined according to the service identifier 1 and the service identifier 3, respectively, and the terminal device 1 can send CSI-RS at the time domain positions corresponding to Offset-X1 and Offset-X3, respectively.

[0124] In some embodiments, after the terminal device 1 determines the second resource position for sending the CSI-RS, the terminal device 1 also determines a time-frequency resource pool for service transmission. In some embodiments, the time-frequency resources used by the terminal device 1 for service transmission are: the overall time-frequency resources for side link communication of the terminal device configuration 1 minus the time-frequency resources for sending the CSI-RS.

[0125] In some embodiments, after terminal device 1 sends CSI-RS to terminal device 2, terminal device 2 needs to send a beam measurement report (referred to as beam reporting) to terminal device 1. In some embodiments, for terminal device 2 with beam alignment (correspondence) capability, terminal device 2 can use a beam in the same direction as terminal device 1 to send beam reporting. Correspondingly, terminal device 1 can receive the beam measurement report sent by terminal device 2 in a first beam direction, and the first beam direction is the same as the beam direction in which the first terminal device sends CSI-RS. In some embodiments, beam reporting sent by terminal device 2 can be carried in SCI, PSSCH, PSFCH, MAC-CE or RRC / PC5-RRC.

[0126] In some embodiments, for a terminal device 2 without beam alignment (correspondence) capability, after receiving the CSI-RS, the terminal device 2 is not sure in which direction it has better transmission capability. Therefore, the terminal device 2 can send beam reporting to the terminal device 1 in multiple beam directions. Correspondingly, the terminal device 1 can receive beam reporting sent by the terminal device 2 in multiple beam directions, wherein the multiple beam directions can be determined according to the high-level signaling of the network device, or can be determined according to a preset communication protocol, or are fixed directions.

[0127] In some embodiments, when the CSI-RS sent by the terminal device 1 is an independent CSI-RS, the time domain range and / or frequency domain range for sending the CSI-RS can be preset. Among them, the second resource position determined by the terminal device 1 based on the SSB is within the preset time domain range and / or frequency domain range for sending the CSI-RS. In some embodiments, when the CSI-RS sent by the terminal device 1 is an independent CSI-RS, the second resource position can be pre-written, that is, set to a known fixed value.

[0128] In some embodiments, the CSI-RS is a non-independent CSI-RS, then the time domain starting position of the second resource position determined by the terminal device 1 is adjacent to the last time domain symbol of the PSSCH, or there is one or more gap symbols (Gap symbol) between the time domain starting position of the second resource position and the last time domain symbol of the PSSCH. Optionally, the frequency domain bandwidth of the second resource position is consistent with the bandwidth of the PSSCH. The beam further used to send the CSI-RS satisfies one or more of the following conditions:

[0129] The beam directions of the CSI-RSs in the CSI-RS resource set to which the CSI-RS belongs are different, that is, the CSI-RS is of the repetition off type;

[0130] The beam used to transmit CSI-RS is the same as the beam used to transmit PSSCH / PSCCH;

[0131] The beam used to transmit the CSI-RS is different from the beam used to transmit the PSSCH / PSCCH.

[0132] See also Fig.10 , is a schematic diagram of the structure of a communication device provided in an embodiment of the present invention, wherein the communication device may include: at least one processor; and at least one memory in communication connection with the processor. The communication device may be a terminal device. The memory stores program instructions executable by the processor, and the processor in the terminal device calls the program instructions to execute the actions performed by the terminal device in the beam pairing method provided in the embodiment of the present application.

[0133] like Fig.10 As shown, the communication device is in the form of a general-purpose computing device. The components of the communication device may include, but are not limited to: one or more processors 610, memory 620, a communication bus 640 connecting different system components (including memory 620 and processor 610), and a communication interface 630.

[0134] The communication bus 640 represents one or more of several types of bus structures, including a memory bus or memory controller, a peripheral bus, a graphics acceleration port, a processor or a local bus using any of a variety of bus structures. For example, these architectures include but are not limited to Industry Standard Architecture (ISA) bus, Micro Channel Architecture (MAC) bus, Enhanced ISA bus, Video Electronics Standards Association (VESA) local bus and Peripheral Component Interconnection (PCI) bus.

[0135] The communication device typically includes a variety of computer system readable media. These media can be any available media that can be accessed by the terminal device, including volatile and non-volatile media, removable and non-removable media.

[0136] The memory 620 may include computer system readable media in the form of volatile memory, such as random access memory (RAM) and / or cache memory. The terminal device may further include other removable / non-removable, volatile / non-volatile computer system storage media. Fig.10 Not shown, a disk drive for reading and writing a removable non-volatile disk (e.g., a "floppy disk"), and an optical disk drive for reading and writing a removable non-volatile optical disk (e.g., a compact disc read only memory (CD-ROM), a digital versatile disc read only memory (DVD-ROM), or other optical media) may be provided. In these cases, each drive may be connected to the communication bus 640 via one or more data medium interfaces. The memory 620 may include at least one program product having a set (e.g., at least one) of program modules that are configured to perform the functions of the various embodiments of the present application.

[0137] A program / utility having a set (at least one) of program modules may be stored in memory 620, such program modules including, but not limited to, an operating system, one or more application programs, other program modules, and program data, each of which or some combination may include an implementation of a network environment. The program modules generally perform the functions and / or methods of the embodiments described herein.

[0138] The communication device may also communicate with one or more external devices (e.g., keyboard, pointing device, display, etc.), one or more devices that enable a user to interact with the terminal device, and / or any device that enables the terminal device to communicate with one or more other computing devices (e.g., network card, modem, etc.). Such communication may be performed through the communication interface 630. In addition, the communication device may also communicate with the network adapter ( Fig.10 The network adapter can communicate with one or more networks (such as a local area network (LAN), a wide area network (WAN), and / or a public network, such as the Internet) through the communication bus 640. It should be understood that although Fig.10Not shown, other hardware and / or software modules may be used in conjunction with the communication device, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, disk arrays (Redundant Arrays of Independent Drives; hereinafter referred to as: RAID) systems, tape drives, and data backup storage systems.

[0139] The processor 610 executes various functional applications and data processing by running the programs stored in the memory 620, such as implementing the method provided in the embodiment of the present application.

[0140] It is understandable that the interface connection relationship between the modules illustrated in the embodiments of the present application is only a schematic illustration and does not constitute a structural limitation on the communication device. In other embodiments of the present application, the communication device may also adopt different interface connection methods in the above embodiments, or a combination of multiple interface connection methods.

[0141] In the above embodiments, the processor involved may include, for example, a CPU, a DSP, a microcontroller or a digital signal processor, and may also include a GPU, an embedded neural network processor (Neural-network Process Units; hereinafter referred to as: NPU) and an image signal processor (Image Signal Processing; hereinafter referred to as: ISP). The processor may also include necessary hardware accelerators or logic processing hardware circuits, such as ASIC, or one or more integrated circuits for controlling the execution of the program of the technical solution of the present application. In addition, the processor may have the function of operating one or more software programs, and the software programs may be stored in a storage medium.

[0142] An embodiment of the present application also provides a readable storage medium, which stores a program. When the program is run on a terminal device, the terminal device executes the beam pairing method provided by the embodiment shown in the present application.

[0143] An embodiment of the present application also provides a program product, which includes a program. When the program product is run on a terminal device, the terminal device executes the beam pairing method provided by the embodiment shown in the present application.

[0144] In the embodiments of the present application, "at least one" refers to one or more, and "more than one" 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. Among them, A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following" and similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b and c can be represented by: a, b, c, a and b, a and c, b and c, or a and b and c, where a, b, c can be single or multiple.

[0145] Those of ordinary skill in the art will appreciate that the various units and algorithm steps described in the embodiments disclosed herein can be implemented in a combination of electronic hardware, computer software, and electronic hardware. Whether these functions are performed in hardware or software 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 this application.

[0146] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0147] In several embodiments provided in the present application, if any function 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 storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory; hereinafter referred to as: ROM), random access memory (Random Access Memory; hereinafter referred to as: RAM), disk or optical disk, and other media that can store program codes.

[0148] In this specification, the same or similar parts between the various embodiments can be referred to each other. In particular, for the device embodiment and the terminal embodiment, since they are basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the description in the method embodiment.

Claims

1. A beam pairing method, characterized in that: The method is applied to a first terminal device, comprising: Determine the first resource location of the SSB; Determining a second resource position of a CSI-RS according to the first resource position of the SSB; A CSI-RS is sent at the second resource position, and the CSI-RS is used for beam pairing with the second terminal device.

2. The method according to claim 1, characterized in that Determining a second resource position of a CSI-RS according to the first resource position of the SSB includes: Determining a position offset of a CSI-RS relative to the first resource position; A second resource position of a CSI-RS is determined according to the first resource position and the position offset.

3. The method according to claim 2, characterized in that The position offset is determined according to high-level signaling of a network device, or the position offset is determined according to a preconfiguration method, or the position offset is a fixed position.

4. The method according to claim 2, characterized in that: The first resource position includes: a first frequency domain position; The first frequency domain position includes: one or more of: the RB position occupied by the SSB, the center frequency point position of the SSB bandwidth, and the total number of RBs occupied by the SSB; The position offset comprises: an offset of the CSI-RS relative to one or more of the first frequency domain positions; The second frequency domain position includes: one or more of: an RB position occupied by the CSI-RS, a center frequency point position of the CSI-RS bandwidth, and a total number of RBs occupied by the CSI-RS.

5. The method according to claim 2, characterized in that: The first resource location includes: a first time domain location; The first time domain position includes: one or more of the time domain period of the SSB, the time domain period offset, the number of SSBs in one time domain period, and the time domain interval between two adjacent SSBs; The position offset includes: an offset of one or more of the first time domain positions of the CSI-RS relative to the SSB; The second time domain position includes: one or more of the time domain period of the CSI, the time domain period offset, the number of SSBs in a time domain period, and the time domain interval between two adjacent SSBs.

6. The method according to claim 5, characterized in that There is no common time domain position between the second time domain position and the first time domain position.

7. The method according to claim 5, characterized in that The second time domain position and the first time domain position have the same time domain position; the method further includes: According to the signal priority configuration of CSI-RS and SSB, a signal with a higher priority is determined from CSI-RS and SSB; At the same time domain position as the second time domain position and the first time domain position, a signal with a high priority is sent and received.

8. The method according to claim 2, characterized in that: The determining, according to the first resource position and the position offset, a second resource position of the CSI-RS includes: Determine the signal type of CSI-RS; Determine a position offset that matches a signal type of the CSI-RS, where different types of CSI-RS correspond to different position offsets; A second resource position of the CSI-RS is determined according to the first resource position and a position offset matching the type of the CSI-RS.

9. The method according to claim 8, characterized in that The signal types of the CSI-RS include: The beam directions of the CSI-RS in the CSI-RS resource set are the same; The beam directions of the CSI-RS in the CSI-RS resource set are different types.

10. The method according to claim 2, characterized in that The determining, according to the first resource position and the position offset, a second resource position of the CSI-RS includes: Determine a service identifier of the first terminal device, where the first terminal device includes one or more service identifiers; Determine a location offset that matches a service identifier of the first terminal device, wherein different service identifiers correspond to different location offsets; The second resource position of the CSI-RS is determined according to the first resource position and a position offset that matches the service identifier of the first terminal device.

11. The method according to claim 10, characterized in that If the first terminal device includes multiple service identifiers, the determined second resource positions are multiple; and sending the CSI-RS at the second resource position includes: The CSI-RS is sent respectively at the determined multiple second resource positions.

12. The method according to any one of claims 1 to 11, characterized in that: The time-frequency resources used by the first terminal device for service transmission are: the overall time-frequency resources configured by the first terminal device for side link communication minus the time-frequency resources used for sending CSI-RS.

13. The method according to any one of claims 1 to 11, characterized in that After sending the CSI-RS at the second resource position, the method further includes: A beam measurement report sent by the second terminal device is received in a first beam direction, where the first beam direction is the same as the beam direction in which the first terminal device sends the CSI-RS.

14. The method according to any one of claims 1 to 11, characterized in that After sending the CSI-RS at the second resource position, the method further includes: The beam measurement report sent by the second terminal device is received in multiple beam directions, where the multiple beam directions are determined according to high-level signaling of a network device, or according to a preset communication protocol, or are fixed directions.

15. The method according to claim 1, characterized in that If the CSI-RS is an independent CSI-RS, a time domain range and / or frequency domain range for sending the CSI-RS is preset; and the second resource position is within the preset time domain range and / or frequency domain range for sending the CSI-RS.

16. The method according to claim 1, characterized in that If the CSI-RS is a non-independent CSI-RS, the frequency domain bandwidth of the second resource position is consistent with the bandwidth of the PSSCH; the time domain starting position of the second resource position is adjacent to the last time domain symbol of the PSSCH, or there is one or more interval symbols between the time domain starting position of the second resource position and the last time domain symbol of the PSSCH.

17. The method according to claim 16, characterized in that The beam used to send the CSI-RS satisfies one or more of the following conditions: The beam directions of the CSI-RSs in the CSI-RS resource set to which the CSI-RS belongs are different; The beam used to transmit CSI-RS is the same as the beam used to transmit PSSCH / PSCCH; The beam used to transmit the CSI-RS is different from the beam used to transmit the PSSCH / PSCCH.

18. A communication device, characterized in that: include: A processor and a memory, wherein the memory is used to store a program; and the processor is used to run the program to implement the beam pairing method as described in any one of claims 1 to 17.

19. The communication device according to claim 18, characterized in that: The communication device is a chip, or the communication device is a terminal device.

20. A readable storage medium, characterized in that: The readable storage medium stores a program, and when the program is executed on a terminal device, the beam pairing method as described in any one of claims 1 to 17 is implemented.

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