Transmission method and apparatus of reference signal

Abstract

The application provides a reference signal transmission method and device, and relates to the technical field of communication. The method comprises the following steps: acquiring a time-frequency resource set configured for a reference signal, wherein the reference signal is used for beam management of sidelink communication; and performing sidelink transmission of the reference signal by using time-frequency resources in the time-frequency resource set. By applying the technical solution of the application, in the sidelink communication, a resource configuration scheme required for the transmission of the reference signal used for beam management is provided, and the accurate sidelink transmission of the reference signal used for beam management can be improved.

Description

Technical Field

[0001] This application relates to the field of communication technology, and in particular to a method and apparatus for transmitting a reference signal. Background Technology

[0002] With technological advancements, sidelink (SL) communication using higher millimeter-wave frequencies has become possible. When using millimeter-wave frequencies, analog beamforming or hybrid analog-digital beamforming is typically employed. Therefore, beam management is required on the sidelink, which can be achieved through a reference signal (RS).

[0003] However, currently, there is a lack of resource configuration schemes for the transmission of reference signals used for beam management in sidelink communication, which affects the sidelink transmission of these reference signals. Summary of the Invention

[0004] This application proposes a method and apparatus for transmitting a reference signal. In side link communication, it provides a resource configuration scheme required for the transmission of a reference signal that can be used for beam management, which can improve the accuracy of side link transmission of the reference signal used for beam management.

[0005] A first aspect of this application provides a method for transmitting a reference signal, applied to a transmitting user equipment (UE). The method includes: acquiring a set of time-frequency resources configured for the reference signal, wherein the reference signal is used for beam management of sidelink communication; and using the time-frequency resources in the set of time-frequency resources to perform sidelink transmission of the reference signal.

[0006] In some embodiments of this application, the time and frequency resource set is configured based on the time and frequency resources in the direct-connect resource pool of the sidelink.

[0007] In some embodiments of this application, when the Physical Sidelink Feedback Channel (PSFCH) time and frequency resources exist in the direct resource pool, the time and frequency resources used by the reference signal in the time and frequency resource set and the time and frequency resources used for PSFCH transmission are frequency division multiplexed.

[0008] In some embodiments of this application, the reference signal uses the same time-domain period and time-domain offset value as the time-frequency resource configuration of the PSFCH, such that the time-frequency resources used by the reference signal and the time-frequency resources of the PSFCH appear in the same time domain and occupy the same Orthogonal Frequency Division Multiplexing (OFDM) symbols as the PSFCH, and the time-domain offset value is a slot offset value relative to system frame number (SFN) 0 or direct frame number (DFN) 0.

[0009] In some embodiments of this application, the time-domain resource information of the reference signal is the same as the time-domain resource information of the PSFCH, and the frequency-domain resource information of the reference signal is pre-configured or configured through downlink control signaling.

[0010] In some embodiments of this application, the time-frequency resource set is orthogonal to the first time-frequency resource set used for Physical Sidelink Control Channel (PSCCH) transmission, and the time-frequency resources used by the reference signal in the time-frequency resource set and the time-frequency resources used for PSCCH transmission are time-division multiplexing (TDM).

[0011] In some embodiments of this application, the time-frequency resource set and the second time-frequency resource set used for Physical Sidelink Control Channel (PSSCH) transmission are orthogonal, and the time-frequency resources used by the reference signal in the time-frequency resource set and the time-frequency resources used for PSSCH transmission are time-division multiplexed.

[0012] In some embodiments of this application, the time and frequency resource set supports the transmission of reference signals sent by multiple different UEs in the same time slot through time domain multiplexing, frequency domain multiplexing, or code domain multiplexing.

[0013] In some embodiments of this application, when the time-frequency resource of the PSFCH is not present in the direct-connected resource pool, the time-frequency resource set supports periodic resource configuration.

[0014] In some embodiments of this application, the time and frequency resources used by the reference signal occupy the last part of the OFDM symbol of the side-link OFDM symbol, and the OFDM symbol preceding the last part of the OFDM symbol is the automatic gain control (AGC) symbol of the reference signal.

[0015] In some embodiments of this application, the step of using time and frequency resources in the time and frequency resource set to perform side link transmission of the reference signal includes: selecting time and frequency resources in the time and frequency resource set according to downlink control signaling sent by the base station, or receiving direct connection control signaling sent by the UE, or sending the UE to autonomously select time and frequency resources, and using the selected time and frequency resources to perform side link transmission of the reference signal.

[0016] In some embodiments of this application, the downlink control signaling includes one of the following:

[0017] Radio Resource Control (RRC) signaling;

[0018] Media Access Layer Control Element (MACCE);

[0019] Downlink Control Information (DCI).

[0020] In some embodiments of this application, the direct connection control signaling includes one of the following:

[0021] Side link RRC signaling;

[0022] MACCE;

[0023] Sidelink Control Information (SCI).

[0024] In some embodiments of this application, the reference signal includes one of the following:

[0025] Channel-state information reference signal (CSI-RS);

[0026] The Sidelink SS block (S-SSB) is a direct-connect synchronization information block, where SS is an abbreviation for Synchronization signal.

[0027] Sounding Reference Signal (SRS).

[0028] A second aspect of this application provides a method for transmitting a reference signal, applied to a UE, the method comprising: receiving a reference signal transmitted on a side-link, wherein the reference signal is used for beam management of side-link communication, and the reference signal is transmitted using time-frequency resources in a time-frequency resource set configured for the reference signal.

[0029] In some embodiments of this application, the time and frequency resource set is configured based on the time and frequency resources in the direct-connect resource pool of the sidelink.

[0030] In some embodiments of this application, when there are time and frequency resources for PSFCH in the direct-connect resource pool, the time and frequency resources used by the reference signal in the time and frequency resource set and the time and frequency resources used for PSFCH transmission are frequency-division multiplexed.

[0031] In some embodiments of this application, the reference signal uses the same time-domain period and time-domain offset value as the time-frequency resource configuration of the PSFCH, such that the time-frequency resources used by the reference signal and the time-frequency resources of the PSFCH appear in the same time domain and occupy the same OFDM symbols as the PSFCH. The time-domain offset value is a time-domain offset value relative to the system frame number SFN0 or the direct frame number DFN0.

[0032] In some embodiments of this application, the time-domain resource information of the reference signal is the same as the time-domain resource information of the PSFCH, and the frequency-domain resource information of the reference signal is pre-configured or configured through downlink control signaling.

[0033] In some embodiments of this application, the time-frequency resource set and the first time-frequency resource set used for PSCCH transmission are orthogonal, and the time-frequency resources used by the reference signal in the time-frequency resource set and the time-frequency resources used for PSCCH transmission are time-division multiplexed.

[0034] In some embodiments of this application, the time-frequency resource set and the second time-frequency resource set used for PSSCH transmission are orthogonal, and the time-frequency resources used by the reference signal in the time-frequency resource set and the time-frequency resources used for PSSCH transmission are time-division multiplexed.

[0035] In some embodiments of this application, the time and frequency resource set supports the transmission of reference signals sent by multiple different UEs in the same slot through time domain multiplexing, frequency domain multiplexing, or code domain multiplexing.

[0036] In some embodiments of this application, when the time-frequency resource of the PSFCH is not present in the direct-connected resource pool, the time-frequency resource set supports periodic resource configuration.

[0037] In some embodiments of this application, the time-frequency resources used by the reference signal occupy the last part of the OFDM symbols of the cross-link OFDM symbols, and the OFDM symbol preceding the last part of the OFDM symbols is the AGC symbol of the reference signal.

[0038] In some embodiments of this application, the reference signal is selected by the UE based on downlink control signaling sent by the base station, or by direct connection control signaling sent by the UE, or by the UE autonomously selecting time and frequency resources from the time and frequency resource set and transmitting using the selected time and frequency resources.

[0039] In some embodiments of this application, the downlink control signaling includes one of the following:

[0040] RRC signaling;

[0041] MACCE;

[0042] DCI.

[0043] In some embodiments of this application, the direct connection control signaling includes one of the following:

[0044] Side link RRC signaling;

[0045] MACCE;

[0046] SCI.

[0047] In some embodiments of this application, the reference signal includes one of the following:

[0048] CSI-RS;

[0049] S-SSB;

[0050] SRS.

[0051] A third aspect of this application provides a reference signal transmission apparatus for a transmitting UE. The apparatus includes: an acquisition module configured to acquire a set of time-frequency resources configured for the reference signal, wherein the reference signal is used for beam management of sidelink communication; and a transmission module configured to use the time-frequency resources in the set of time-frequency resources to perform sidelink transmission of the reference signal.

[0052] A fourth aspect of this application provides a reference signal transmission apparatus for receiving a UE, the apparatus comprising:

[0053] A receiving module is configured to receive a reference signal transmitted on the side-link, wherein the reference signal is used for beam management of the side-link communication and is transmitted using time-frequency resources in a set of time-frequency resources configured for the reference signal.

[0054] A fifth aspect of this application provides a communication device comprising: a transceiver; a memory; and a processor, respectively connected to the transceiver and the memory, configured to control the transmission and reception of wireless signals of the transceiver by executing computer-executable instructions on the memory, and capable of implementing the methods of the first aspect embodiment or the second aspect embodiment of this application.

[0055] A sixth aspect of this application provides a computer storage medium storing computer-executable instructions; when executed by a processor, the computer-executable instructions can implement the methods described in the first aspect of this application or the second aspect of this application.

[0056] This application provides a method and apparatus for transmitting a reference signal. In sidelink communication, it provides a resource configuration scheme for transmitting a reference signal that can be used for beam management, thereby improving the accuracy of sidelink transmission of the reference signal used for beam management. Specifically, the UE obtains a set of time and frequency resources configured for the reference signal, wherein the reference signal is used for beam management in sidelink communication; then, the time and frequency resources in the time and frequency resource set are used for sidelink transmission of the reference signal, thereby enabling the measurement of a beam with better quality, and then sidelink communication between UEs is performed through this beam with better quality.

[0057] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0058] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:

[0059] Figure 1 This is a schematic diagram of an example architecture according to an embodiment of this application;

[0060] Figure 2 This is a schematic flowchart illustrating a method for transmitting a reference signal according to an embodiment of this application.

[0061] Figure 3 This is a schematic flowchart illustrating a method for transmitting a reference signal according to an embodiment of this application.

[0062] Figure 4This is a schematic flowchart illustrating a method for transmitting a reference signal according to an embodiment of this application.

[0063] Figure 5 This is a block diagram of a reference signal transmission apparatus according to an embodiment of this application;

[0064] Figure 6 This is a block diagram of a reference signal transmission apparatus according to an embodiment of this application;

[0065] Figure 7 This is a schematic diagram of the structure of a communication device according to an embodiment of this application;

[0066] Figure 8 This is a schematic diagram of the structure of a chip provided in an embodiment of this application. Detailed Implementation

[0067] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. It should be noted that, unless otherwise specified, the embodiments of this application and the features in the embodiments can be combined with each other.

[0068] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to limit the embodiments of this application. The singular forms “a” and “the” as used in the embodiments of this application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0069] It should be understood that although the terms first, second, third, etc., may be used to describe various information in the embodiments of this application, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of the embodiments of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "when," "when," or "in response to a determination."

[0070] To facilitate understanding, the terminology used in this embodiment will be introduced first.

[0071] 1. Sidelink (SL)

[0072] The communication interface between UEs is called the PC-5 interface. On the PC-5 interface, the link for data transmission between UEs is called the sidelink. For example... Figure 1 As shown, based on the correspondence between the sending UE (transmitting end UE) 11 and the receiving UE (receiving end UE) 12, three transmission modes can be supported on the side link: unicast, multicast, and broadcast. The sending UE 11 transmits the SCI on the PSCCH channel and the second-stage SCI on the PSSCH channel. For packets with Hybrid Automatic Repeat Request (HARQ) feedback enabled, the receiving UE 12 provides HARQ-ACK feedback to the PSSCH on the PSFCH.

[0073] 2. Beam Management

[0074] In this embodiment, beam management dynamically selects the direction and frequency of beams used for communication between UEs (e.g., transmitting UE 11 and receiving UE 12) based on channel quality. The beam involved in this embodiment can refer to "beam," or be called spatial relation information, spatial setting, Spatial Rx parameter, Tx spatial filter, spatial domain receive filters, TCI (transmission configuration indication) status, QCL (quasi-co-location) type D, etc.

[0075] 3. Reference Signal (RS)

[0076] The reference signal is a "pilot" signal, a known signal provided by the transmitting UE 11 to the receiving UE 12 for channel estimation or channel sounding. In this embodiment, it can be used for beam management in sidelink communication.

[0077] The continuous emergence of new-generation internet applications has placed higher demands on wireless communication technologies, driving their continuous evolution to meet application needs. To better support vehicle-to-everything (V2X) communication, LTE Vehicle-to-X (V2X) technology was developed in Long Term Evolution (LTE) Release 14, supporting direct communication between V2X devices (such as vehicles-to-vehicle, vehicle-to-pedestrian, and vehicle-to-roadside nodes) via direct links. Release 15 further enhanced LTE V2X technology, supporting features such as carrier aggregation. Following the release of 5G New Radio (NR) technology in Release 15, 3GPP initiated work on supporting V2X communication using the NR interface, completing 5G Sidelink in Release 16, supporting direct communication between V2X devices via NR technology. Release 17 further enhanced NR Sidelink in areas such as energy efficiency and reliability.

[0078] Beam management support was not considered in LTE V2X and Release 16 NRV2X because the primary frequency bands for V2X applications at that time were located in lower spectral locations. However, with technological advancements, using higher millimeter-wave bands for Sidelink communication has become possible. When using millimeter-wave bands (such as the FR2 band), analog beamforming or hybrid analog-digital beamforming is typically employed. Therefore, beam management support is required on Sidelink.

[0079] Beam management in NR downlink (DL) or uplink (UL) communication is performed using reference signals such as the downlink synchronization signal and physical broadcast channel (PBCH) block (SSB), CSI-RS, or uplink SRS. In Rel-16 / 17, the reference signal format transmitted on the SL is similar to that of the DL reference signal, but it can only be transmitted along with the PSSCH, and uses a portion of the resource elements (REs) on a portion of the OFDM symbols of the corresponding PSSCH as the time-frequency resources for transmission. The corresponding PSSCH can be transmitted using other REs on the same OFDM symbol not used by the reference signal.

[0080] When using analog beamforming or hybrid analog-digital beamforming, the same UE uses the same transmit / receive analog beam on the same OFDM symbol. Therefore, according to the resource configuration scheme of the reference signal for DL / UL communication, the CSI-RS transmitted on the SL can only use the same analog beam as its corresponding PSSCH. However, beam management needs to support the same UE using different beams to transmit or receive reference signals. If the resource configuration scheme of the reference signal for DL / UL communication is still used, it will cause unnecessary duplicate PSSCH transmissions, reducing the resource utilization efficiency of the sidelink.

[0081] Therefore, this embodiment proposes a method and apparatus for transmitting reference signals. In side link communication, it provides a resource configuration scheme required for the transmission of reference signals that can be used for beam management, which can improve the accuracy of side link transmission of reference signals used for beam management.

[0082] The method and apparatus for transmitting reference signals provided in this application will now be described in detail with reference to the accompanying drawings.

[0083] Figure 2 A schematic flowchart illustrating a method for transmitting a reference signal according to an embodiment of this application is shown. Figure 2 As shown, this method is applied to the transmitting UE side (e.g., Figure 1 The sending UE 11) in the process can include the following steps.

[0084] Step 201: Send the UE to obtain the set of time and frequency resources configured for the reference signal.

[0085] The reference signal is used for beam management in side link communication.

[0086] In this embodiment, an independent set of time and frequency resources can be configured for the reference signal for beam management used in side link communication. This set of time and frequency resources includes the time and frequency resources used for the transmission of the parameter signal in the side link, specifically including the time domain (time domain) resources and the frequency domain (frequency domain) resources used for the transmission of the parameter signal in the side link.

[0087] In some examples, the time-frequency resources used by the reference signal from this time-frequency resource set do not overlap with the time-frequency resources used for PSSCH transmission. That is, the time-frequency resources used by the UE to transmit the reference signal in sidelink communication belong to resources other than those used for its corresponding PSSCH transmission. Compared to the reference signal resource configuration scheme for DL / UL communication, the reference signal can be transmitted separately on the sidelink and does not use a portion of the REs on a portion of the OFDM symbols of the corresponding PSSCH as the time-frequency resources for transmission. Using different beams to transmit the reference signal for the same UE can effectively reduce redundant and unnecessary PSSCH transmissions, improving the resource utilization efficiency of the sidelink.

[0088] In some examples, this independent set of time and frequency resources can be pre-configured in the chip on the UE side; or, if the UE is within network coverage, it can be configured based on the downlink signaling of the base station.

[0089] Step 202: Send the UE to use the time and frequency resources in the time and frequency resource set to transmit the reference signal on the side link.

[0090] For example, different beams can be used to transmit reference signals for the same UE. Specifically, time and frequency resources in the time and frequency resource set can be used for the side link transmission of the reference signals. The reference signals transmitted on different time and frequency resources can be orthogonally split by time division multiplexing, frequency division multiplexing, or code division multiplexing, so that the beam with better measurement quality can be selected, and then the side link communication between UEs can be carried out through the beam with better quality.

[0091] The reference signal transmission method provided in this embodiment offers a resource configuration scheme for reference signal transmission that can be used for beam management in side link communication, thereby improving the accuracy of side link transmission of reference signals used for beam management. It supports the separate transmission of reference signals on the side link, and when reference signals are transmitted separately, it solves the resource reuse problem between reference signals and other existing SL transmissions.

[0092] Figure 3 A schematic flowchart of a method for transmitting a reference signal according to an embodiment of this application is shown. Based on Figure 2 The illustrated embodiment, as Figure 3 As shown, this method is applied to the transmitting UE side (e.g., Figure 1 The sending UE 11) in the process can include the following steps.

[0093] Step 301: Send the UE to obtain the set of time and frequency resources configured for the reference signal.

[0094] The reference signal is used for beam management in sidelink communication. In some examples, the reference signal used for sidelink beam management may include one of CSI-RS, Direct S-SSB, and SRS, or other RS ​​signal formats. It should be noted that, for ease of understanding, the following explanation will primarily use CSI-RS as an example.

[0095] In some examples, the time-frequency resource set can be configured based on the time-frequency resources in the direct-connect resource pool of the sidelink. Different UEs can use the time-frequency resources in this time-frequency resource set to transmit SLCSI-RS. The time-frequency resources contained in the direct-connect resource pool can be used for SLCSI-RS transmission, PSFCH transmission, PSCCH transmission, and PSSCH transmission, etc.

[0096] In some examples, when PSFCH time and frequency resources exist in the direct-connect resource pool, the time and frequency resources used by the reference signal in the time and frequency resource set and the time and frequency resources used for PSFCH transmission are frequency division multiplexing (FDM). FDM uses frequency to distinguish signals transmitted simultaneously on the same channel; the signals are separate in the frequency domain but mixed in the time domain.

[0097] Furthermore, in some examples, the reference signal can use the same time-domain period and time-domain offset as the PSFCH time-frequency resource configuration, so that the time-frequency resources used by the reference signal and the PSFCH time-frequency resources appear in the same time domain and occupy the same OFDM symbols as the PSFCH. The time-domain period can be the period of a time unit (such as a slot). For example, if the slot period is 4, the reference signal is transmitted once every 4 slots; if the slot period is 2, the reference signal is transmitted once every 2 slots. The time-domain offset is a time-domain offset relative to SFN0 or DFN0.

[0098] For example, the time and frequency resources of SLCSI-RS and PSFCH resources appear in the same slot and occupy the same OFDM symbols as PSFCH. If PSFCH resources support periodic resource configuration, this can be configured or pre-configured through the downlink signaling of the base station, along with the slot period and slot offset value (starting offset value) relative to SFN0 / DFN0. CSI-RS can use the same period and offset value as PSFCH resources to determine its time domain location.

[0099] In addition, the reference signal may not use the same slot period and slot offset values ​​as the PSFCH in terms of time and frequency resource configuration. Accordingly, in some examples, the time-domain resource information of the reference signal may be the same as that of the PSFCH, while the frequency-domain resource information of the reference signal may be pre-configured or configured via downlink control signaling of the base station. For example, configuring the location of the starting Physical Resource Block (PRB) and the number of PRBs occupied.

[0100] For example, within a slot, the time and frequency resources of SL CSI-RS occupy the same OFDM symbol position as the PSFCH resources. For instance, the PSFCH resource occupies the second-to-last OFDM symbol of all SLOFDM symbols within a slot (the last OFDM symbol is used for the guard interval), and the third-to-last OFDM symbol is the AGC symbol for the PSFCH. Similarly, CSI-RS occupies the second-to-last OFDM symbol of all SLOFDM symbols within a slot, and uses the third-to-last OFDM symbol as the AGC symbol.

[0101] SLCSI-RS can also appear in different slots from PSFCH. For example, the period and time-domain offset relative to SFN0 / DFN0 can be configured independently for SLCSI-RS. When SLCSI-RS appears in a slot where PSFCH does not exist, the OFDM symbols it occupies in the slot are the same as those in the slot where PSFCH exists.

[0102] In some examples, the time-frequency resource set and the first time-frequency resource set used for PSCCH transmission are orthogonal (non-overlapping), and the time-frequency resources used by the reference signal in the time-frequency resource set and the time-frequency resources used for PSCCH transmission are time-division multiplexed (TDM). TDM distinguishes signals transmitted sequentially on the same channel in time; the signals are separate in the time domain but mixed in the frequency domain.

[0103] For example, when PSFCH time and frequency resources exist in the direct-connect resource pool, within a slot, SLCSI-RS resources and PSFCH resources are frequency-division multiplexed using FDM, and SLCSI-RS resources and PSCCH resources are time-division multiplexed using TDM. It should be noted that PSFCH and PSCCH resources are TDM-based within a slot; therefore, if CSI-RS occupies the same OFDM symbols as PSFCH, then CSI-RS and PSCCH resources are also TDM-based. Conversely, when PSFCH time and frequency resources are not present in the direct-connect resource pool, SLCSI-RS resources and PSCCH resources are time-division multiplexed using TDM within a slot.

[0104] In some examples, the time-frequency resource set and the second time-frequency resource set used for PSSCH transmission are orthogonal (non-overlapping), and the time-frequency resources used by the reference signal in the time-frequency resource set and the time-frequency resources used for PSSCH transmission are time-division multiplexed.

[0105] For example, when PSFCH time and frequency resources exist in the direct-connect resource pool, within a slot, SLCSI-RS resources and PSFCH resources are frequency-division multiplexed using FDM, and SLCSI-RS resources and PSSCH resources are time-division multiplexed using TDM. It should be noted that PSFCH resources and PSSCH resources are TDM within a slot; therefore, if CSI-RS occupies the same OFDM symbols as PSFCH, then CSI-RS resources and PSSCH resources are also TDM-relationed. Conversely, when PSFCH time and frequency resources are not present in the direct-connect resource pool, SLCSI-RS resources and PSSCH resources are time-division multiplexed using TDM within a slot.

[0106] In some examples, the time-frequency resource set supports the transmission of reference signals transmitted by multiple different UEs within the same slot through time-domain multiplexing, frequency-domain multiplexing, or code-domain multiplexing. For example, CSI-RS transmitted by multiple different UEs can be transmitted within the same slot through time-domain / frequency-domain / code-domain multiplexing. This solves the problem of interference between CSI-RS transmitted by different UEs using the same time-frequency code resources.

[0107] In some examples, when the PSFCH time-frequency resource set is not available in the directly connected resource pool, periodic resource configuration can be supported. For example, periodic CSI-RS resource configuration can be supported, specifically by configuring the period and start offset value of the CSI-RS resource.

[0108] In some examples, the time-frequency resources used by the reference signal occupy the last part of the OFDM symbols on the side-link OFDM symbol set, and the OFDM symbol preceding the last part of the last OFDM symbol is the AGC symbol of the reference signal. This AGC symbol can be used by the receiving UE to adjust the resources of the automatic power amplifier, such as adjusting the power level. For example, when the CSI-RS is transmitted separately using the time-frequency resource set, since the transmission power and transmission beam of the CSI-RS may differ from those of other SL signals in the same slot, a corresponding AGC symbol can be set so that the receiving UE can adjust the resources of the automatic power amplifier according to the AGC symbol.

[0109] For example, within one slot, CSI-RS resources occupy the last part of the OFDM symbols (excluding gap symbols) of the SL OFDM symbols. The length of a CSI-RS symbol can be k consecutive OFDM symbols, where the value of k can be predefined, preconfigured, or configured via downlink signaling. For example, k=1 or k=2. A CSI-RS symbol is preceded by an AGC symbol of OFDM symbols, and the signal transmitted on the AGC symbol is the same as the first OFDM symbol of the CSI-RS signal.

[0110] For example, when k=1, the SLCSI-RS resource occupies the second-to-last SL OFDM symbol of all available SLOFDM symbols in a slot; while the third-to-last SL OFDM symbol is used as the AGC symbol of the SLCSI-RS; when k=2, the SLCSI-RS resource occupies the second-to-last and third-to-last SL OFDM symbols of all available SLOFDM symbols in a slot, while the fourth-to-last SL OFDM symbol is used as the AGC symbol of the SLCSI-RS.

[0111] Step 302: The UE selects time and frequency resources from the time and frequency resource set according to the downlink control signaling sent by the base station, or receives direct connection control signaling sent by the UE, or the UE selects time and frequency resources on its own, and uses the selected time and frequency resources for side link transmission of reference signals.

[0112] In some examples, downlink control signaling may include one of RRC signaling, MACCE, and DCI, such as downlink control signaling including RRC signaling, MACCE, DCI, etc. Direct link control signaling includes one of sidelink RRC signaling, MACCE, and SCI, such as direct link control signaling including SidelinkRRC, MAC CE, SCI, etc.

[0113] For example, the UE may send CSI-RS time and frequency resources in the CSI-RS time and frequency resource set according to the downlink control signaling sent by the base station, or receive direct control signaling sent by the UE, or send CSI-RS time and frequency resources in the set independently by the UE, and use the selected time and frequency resources to send CSI-RS on the side link.

[0114] By applying the reference signal transmission method provided in this embodiment, a resource configuration scheme for reference signal transmission that can be used for beam management is provided in sidelink communication. Specifically, a set of RS time-frequency resources for beam management can be configured in the direct-connect resource pool. Within a slot, the time-frequency resources used by RS in the time-frequency resource set and the time-frequency resources used for PSFCH transmission are frequency-division multiplexed, and the time-frequency resources used for PSCCH / PSSCH transmission are time-division multiplexed. This improves the accuracy of sidelink transmission of reference signals for beam management. Using different beams to transmit reference signals for the same UE can effectively reduce redundant and unnecessary PSSCH transmissions, improving the resource utilization efficiency of the sidelink.

[0115] Figure 4 A schematic flowchart of a method for transmitting a reference signal according to an embodiment of this application is shown. This method is applied to the receiving UE side (e.g., Figure 1 The receiving UE 12) in the process can include the following steps.

[0116] Step 401: Receive the reference signal transmitted on the UE receiving side of the crosslink.

[0117] The reference signal is used for beam management of sidelink communication and is transmitted using time-frequency resources from the set of time-frequency resources configured for the reference signal. In some examples, the reference signal used for sidelink beam management may include one of CSI-RS, Direct S-SSB, and SRS, or other RS ​​signal formats.

[0118] In this embodiment, an independent set of time-frequency resources can be configured for the reference signal used for beam management in sidelink communication. This set of time-frequency resources includes the time-frequency resources used for the transmission of the parameter signal in the sidelink, specifically including the time-domain resources and frequency-domain resources used for the transmission of the parameter signal in the sidelink. The time-frequency resources used by the reference signal from this set of time-frequency resources do not overlap with the time-frequency resources used for PSSCH transmission; that is, the time-frequency resources used by the UE to transmit the reference signal in sidelink communication belong to resources other than those used for its corresponding PSSCH transmission.

[0119] In some examples, the time-frequency resource set can be configured based on the time-frequency resources in the direct-connected resource pool of the sidelink.

[0120] In some examples, when PSFCH time and frequency resources exist in the direct-connected resource pool, the time and frequency resources used by the reference signal in the time and frequency resource set and the time and frequency resources used by PSFCH transmission are frequency-division multiplexed.

[0121] In some examples, the reference signal uses the same time-domain period and time-domain offset as the PSFCH time-frequency resource configuration, such that the time-frequency resources used by the reference signal and the PSFCH time-frequency resources appear in the same time domain and occupy the same OFDM symbols as the PSFCH, with the time-domain offset value being the time-domain offset value relative to SFN0 or DFN0.

[0122] In some examples, the time-domain resource information of the reference signal is the same as that of the PSFCH, and the frequency-domain resource information of the reference signal is pre-configured or configured via downlink control signaling.

[0123] In some examples, the time-frequency resource set and the first time-frequency resource set used for PSCCH transmission are orthogonal, and the time-frequency resources used by the reference signal in the time-frequency resource set and the time-frequency resources used for PSCCH transmission are time-division multiplexed.

[0124] In some examples, the time-frequency resource set and the second time-frequency resource set used for PSSCH transmission are orthogonal, and the time-frequency resources used by the reference signal in the time-frequency resource set and the time-frequency resources used for PSSCH transmission are time-division multiplexed.

[0125] In some examples, the time-frequency resource set supports the transmission of reference signals sent by multiple different UEs within the same slot through time-domain multiplexing, frequency-domain multiplexing, or code-domain multiplexing.

[0126] In some examples, when the time-frequency resource set of PSFCH is not available in the directly connected resource pool, the time-frequency resource set supports periodic resource configuration.

[0127] In some examples, the time and frequency resources used by the reference signal occupy the last part of the OFDM symbol on the side-link OFDM symbol, and the OFDM symbol preceding the last part of the OFDM symbol is the AGC symbol of the reference signal.

[0128] In some examples, the reference signal is transmitted based on downlink control signaling sent by the base station, or direct control signaling sent by the UE, or time and frequency resources selected by the sending UE from a set of time and frequency resources.

[0129] In some examples, downlink control signaling may include one of RRC signaling, MACCE, and DCI, such as downlink control signaling including RRC signaling, MACCE, DCI, etc. Direct link control signaling includes one of sidelink RRC signaling, MACCE, and SCI, such as direct link control signaling including SidelinkRRC, MAC CE, SCI, etc.

[0130] It should be noted that the specific resource allocation scheme for the above reference signals can be found by referring to [reference needed]. Figure 2 and Figure 3 The corresponding descriptions are not repeated here.

[0131] By applying the reference signal transmission method provided in this embodiment, a resource configuration scheme for reference signal transmission that can be used for beam management is provided in sidelink communication. Specifically, a set of RS time-frequency resources for beam management can be configured in the direct-connect resource pool. Within a slot, the time-frequency resources used by RS in the time-frequency resource set and the time-frequency resources used for PSFCH transmission are frequency-division multiplexed, and the time-frequency resources used for PSCCH / PSSCH transmission are time-division multiplexed. This improves the accuracy of sidelink transmission of reference signals for beam management. Using different beams to transmit reference signals for the same UE can effectively reduce redundant and unnecessary PSSCH transmissions, improving the resource utilization efficiency of the sidelink.

[0132] In the embodiments provided above, the methods provided by the embodiments of this application have been described from the perspectives of the sending UE and the receiving UE, respectively. To implement the functions of the methods provided in the embodiments of this application, the UE may include hardware structures and software modules, and implement the above functions in the form of hardware structures, software modules, or a combination of hardware structures and software modules. One of the above functions can be executed in the form of hardware structures, software modules, or a combination of hardware structures and software modules.

[0133] Corresponding to the reference signal transmission methods provided in the above embodiments, this application also provides a reference signal transmission device. Since the reference signal transmission device provided in this application corresponds to the reference signal transmission methods provided in the above embodiments, the implementation methods of the reference signal transmission methods are also applicable to the reference signal transmission device provided in this embodiment, and will not be described in detail in this embodiment.

[0134] Figure 5 This is a schematic diagram of a reference signal transmission device provided in an embodiment of this application. The reference signal transmission device can be used to transmit to the UE side.

[0135] like Figure 5As shown, the device may include: an acquisition module 51 configured to acquire a set of time-frequency resources configured for a reference signal, wherein the reference signal is used for beam management of sidelink communication; and a transmission module 52 configured to use the time-frequency resources in the set of time-frequency resources to perform sidelink transmission of the reference signal.

[0136] In some embodiments, the time-frequency resource set is configured based on the time-frequency resources in the direct-connect resource pool of the sidelink.

[0137] In some embodiments, when there are time and frequency resources for PSFCH in the direct-connected resource pool, the time and frequency resources used by the reference signal in the time and frequency resource set and the time and frequency resources used for PSFCH transmission are frequency division multiplexed.

[0138] In some embodiments, the reference signal uses the same time-domain period and time-domain offset value as the time-frequency resource configuration of the PSFCH, such that the time-frequency resources used by the reference signal and the time-frequency resources of the PSFCH appear in the same time domain and occupy the same OFDM symbols as the PSFCH, and the time-domain offset value is a time-domain offset value relative to the system frame number SFN0 or the direct frame number DFN0.

[0139] In some embodiments, the time-domain resource information of the reference signal is the same as the time-domain resource information of the PSFCH, and the frequency-domain resource information of the reference signal is pre-configured or configured through downlink control signaling.

[0140] In some embodiments, the time-frequency resource set and the first time-frequency resource set used for PSCCH transmission are orthogonal, and the time-frequency resources used by the reference signal in the time-frequency resource set and the time-frequency resources used for PSCCH transmission are time-division multiplexed.

[0141] In some embodiments, the time-frequency resource set and the second time-frequency resource set used for PSSCH transmission are orthogonal, and the time-frequency resources used by the reference signal in the time-frequency resource set and the time-frequency resources used for PSSCH transmission are time-division multiplexed.

[0142] In some embodiments, the time and frequency resource set supports the transmission of reference signals sent by multiple different UEs within the same slot through time-domain multiplexing, frequency-domain multiplexing, or code-domain multiplexing.

[0143] In some embodiments, when the time-frequency resource set of the PSFCH is not present in the direct-connected resource pool, the time-frequency resource set supports periodic resource configuration.

[0144] In some embodiments, the time-frequency resources used by the reference signal occupy the last part of the OFDM symbols of the side-link OFDM symbols, and the OFDM symbol preceding the last part of the OFDM symbols is the automatic gain control (AGC) symbol of the reference signal.

[0145] In some embodiments, the transmitting module 52 is specifically configured to select time and frequency resources in the time and frequency resource set independently by the UE based on downlink control signaling sent by the base station, or by receiving direct connection control signaling sent by the UE, and then use the selected time and frequency resources to transmit the reference signal via the side link.

[0146] In some embodiments, downlink control signaling may include one of RRC signaling, MACCE, and DCI, such as downlink control signaling including RRC signaling, MACCE, DCI, etc. Direct connection control signaling includes one of sidelink RRC signaling, MACCE, and SCI, such as direct connection control signaling including SidelinkRRC, MAC CE, SCI, etc.

[0147] In some examples, the reference signal used for side link beam management may include one of CSI-RS, direct-connect S-SSB and SRS, or other RS ​​signal formats.

[0148] By applying the technical solution of this embodiment, a resource configuration scheme required for the transmission of reference signals for beam management is provided in sidelink communication, which can improve the accuracy of sidelink transmission of reference signals for beam management. Using different beams to transmit reference signals for the same UE can effectively reduce redundant and unnecessary PSSCH transmissions, improving the resource utilization efficiency of the sidelink.

[0149] Figure 6 This is a schematic diagram of a reference signal transmission device provided in an embodiment of this application. The reference signal transmission device can be used to receive signals from a UE side.

[0150] like Figure 6 As shown, the device may include: a receiving module 61 configured to receive a reference signal for side-link transmission, wherein the reference signal is used for beam management of side-link communication, and the reference signal is transmitted using time-frequency resources in a time-frequency resource set configured for the reference signal.

[0151] In some embodiments, the time-frequency resource set is configured based on the time-frequency resources in the direct-connect resource pool of the sidelink.

[0152] In some embodiments, when there are time and frequency resources for PSFCH in the direct-connected resource pool, the time and frequency resources used by the reference signal in the time and frequency resource set and the time and frequency resources used for PSFCH transmission are frequency division multiplexed.

[0153] In some embodiments, the reference signal uses the same time-domain period and time-domain offset value as the time-frequency resource configuration of the PSFCH, such that the time-frequency resources used by the reference signal and the time-frequency resources of the PSFCH appear in the same time domain and occupy the same OFDM symbols as the PSFCH, and the time-domain offset value is a time-domain offset value relative to SFN0 or DFN0.

[0154] In some embodiments, the time-domain resource information of the reference signal is the same as the time-domain resource information of the PSFCH, and the frequency-domain resource information of the reference signal is pre-configured or configured through downlink control signaling.

[0155] In some embodiments, the time-frequency resource set and the first time-frequency resource set used for PSCCH transmission are orthogonal, and the time-frequency resources used by the reference signal in the time-frequency resource set and the time-frequency resources used for PSCCH transmission are time-division multiplexed.

[0156] In some embodiments, the time-frequency resource set and the second time-frequency resource set used for PSSCH transmission are orthogonal, and the time-frequency resources used by the reference signal in the time-frequency resource set and the time-frequency resources used for PSSCH transmission are time-division multiplexed.

[0157] In some embodiments, the time and frequency resource set supports the transmission of reference signals sent by multiple different UEs within the same slot through time-domain multiplexing, frequency-domain multiplexing, or code-domain multiplexing.

[0158] In some embodiments, when the time-frequency resource set of the PSFCH is not present in the direct-connected resource pool, the time-frequency resource set supports periodic resource configuration.

[0159] In some embodiments, the time-frequency resources used by the reference signal occupy the last part of the OFDM symbols of the side-link OFDM symbols, and the OFDM symbol preceding the last part of the OFDM symbols is the automatic gain control (AGC) symbol of the reference signal.

[0160] In some embodiments, the reference signal is selected by the UE based on downlink control signaling sent by the base station, or by receiving direct connection control signaling sent by the UE, or by the UE autonomously selecting time and frequency resources from the time and frequency resource set and transmitting using the selected time and frequency resources.

[0161] In some embodiments, downlink control signaling may include one of RRC signaling, MACCE, and DCI, such as downlink control signaling including RRC signaling, MACCE, DCI, etc. Direct connection control signaling includes one of sidelink RRC signaling, MACCE, and SCI, such as direct connection control signaling including SidelinkRRC, MAC CE, SCI, etc.

[0162] In some examples, the reference signal used for side link beam management may include one of CSI-RS, direct-connect S-SSB and SRS, or other RS ​​signal formats.

[0163] By applying the technical solution of this embodiment, a resource configuration scheme required for the transmission of reference signals for beam management is provided in sidelink communication, which can improve the accuracy of sidelink transmission of reference signals for beam management. Using different beams to transmit reference signals for the same UE can effectively reduce redundant and unnecessary PSSCH transmissions, improving the resource utilization efficiency of the sidelink.

[0164] Please see Figure 7 , Figure 7 This is a schematic diagram of the structure of a communication device 1800 provided in this embodiment. The communication device 1800 can be a network device, a user device, a chip, chip system, or processor that supports the network device in implementing the above methods, or a chip, chip system, or processor that supports the user device in implementing the above methods. This device can be used to implement the methods described in the above method embodiments; for details, please refer to the descriptions in the above method embodiments.

[0165] The communication device 1800 may include one or more processors 1801. The processor 1801 may be a general-purpose processor or a dedicated processor, such as a baseband processor or a central processing unit (CPU). The baseband processor can be used to process communication protocols and communication data, while the CPU can be used to control the communication device (e.g., base station, baseband chip, terminal equipment, terminal equipment chip, DU or CU, etc.), execute computer programs, and process data from the computer programs.

[0166] Optionally, the communication device 1800 may further include one or more memories 1802, on which a computer program 1804 may be stored. The processor 1801 executes the computer program 1804 to cause the communication device 1800 to perform the methods described in the above method embodiments. Optionally, the memory 1802 may also store data. The communication device 1800 and the memory 1802 may be provided separately or integrated together.

[0167] Optionally, the communication device 1800 may also include a transceiver 1805 and an antenna 1806. The transceiver 1805 may be referred to as a transceiver unit, transceiver, or transceiver circuit, etc., and is used to implement the transmission and reception functions. The transceiver 1805 may include a receiver and a transmitter. The receiver may be referred to as a receiver or receiving circuit, etc., and is used to implement the receiving function; the transmitter may be referred to as a transmitter or transmitting circuit, etc., and is used to implement the transmitting function.

[0168] Optionally, the communication device 1800 may further include one or more interface circuits 1807. The interface circuits 1807 are used to receive code instructions and transmit them to the processor 1801. The processor 1801 executes the code instructions to cause the communication device 1800 to perform the methods described in the above method embodiments.

[0169] In one implementation, the processor 1801 may include a transceiver for implementing receive and transmit functions. For example, the transceiver may be a transceiver circuit, an interface, or an interface circuit. The transceiver circuit, interface, or interface circuit for implementing receive and transmit functions may be separate or integrated. The aforementioned transceiver circuit, interface, or interface circuit can be used for reading and writing code / data, or it can be used for transmitting or relaying signals.

[0170] In one implementation, processor 1801 may store computer program 1803, which runs on processor 1801 and causes communication device 1800 to perform the methods described in the above method embodiments. Computer program 1803 may be embedded in processor 1801, in which case processor 1801 may be implemented in hardware.

[0171] In one implementation, the communication device 1800 may include circuitry capable of performing the functions of transmitting, receiving, or communicating as described in the aforementioned method embodiments. The processor and transceiver described in this application can be implemented on integrated circuits (ICs), analog ICs, radio frequency integrated circuits (RFICs), mixed-signal ICs, application-specific integrated circuits (ASICs), printed circuit boards (PCBs), electronic devices, etc. The processor and transceiver can also be manufactured using various IC process technologies, such as complementary metal oxide semiconductors (CMOS), n-metal-oxide-semiconductor (NMOS), positive-channel metal oxide semiconductors (PMOS), bipolar junction transistors (BJTs), bipolar CMOS (BiCMOS), silicon germanium (SiGe), gallium arsenide (GaAs), etc.

[0172] The communication device described in the above embodiments may be a network device or a user equipment, but the scope of the communication device described in this application is not limited thereto, and the structure of the communication device may vary. Figure 7 The communication device can be a standalone device or part of a larger device. For example, the communication device could be:

[0173] (1) Independent integrated circuit IC, or chip, or chip system or subsystem;

[0174] (2) A collection of one or more ICs, optionally including storage components for storing data and computer programs;

[0175] (3) ASIC, such as modem;

[0176] (4) Modules that can be embedded in other devices;

[0177] (5) Receivers, terminal equipment, smart terminal equipment, cellular phones, wireless equipment, handheld devices, mobile units, vehicle-mounted equipment, network equipment, cloud equipment, artificial intelligence equipment, etc.

[0178] (6) Others, etc.

[0179] For cases where the communication device can be a chip or a chip system, please refer to [link / reference]. Figure 8 The diagram shows the structure of the chip. Figure 8 The chip shown includes a processor 1901 and an interface 1902. There can be one or more processors 1901, and multiple interfaces 1902.

[0180] Optionally, the chip also includes a memory 1903, which is used to store necessary computer programs and data.

[0181] Those skilled in the art will also understand that the various illustrative logical blocks and steps listed in the embodiments of this application can be implemented by electronic hardware, computer software, or a combination of both. Whether such functionality is implemented through hardware or software depends on the specific application and the overall system design requirements. Those skilled in the art can implement the described functionality using various methods for each specific application, but such implementation should not be construed as exceeding the scope of protection of the embodiments of this application.

[0182] This application also provides a readable storage medium having instructions stored thereon that, when executed by a computer, implement the functions of any of the above method embodiments.

[0183] This application also provides a computer program product that, when executed by a computer, implements the functions of any of the above method embodiments.

[0184] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented, in whole or in part, as a computer program product. A computer program product includes one or more computer programs. When a computer program is loaded and executed on a computer, it generates, in whole or in part, the processes or functions according to the embodiments of this application. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer program can be stored in a computer-readable storage medium or transferred from one computer-readable storage medium to another. For example, a computer program can be transferred from one website, computer, server, or data center to another via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that integrates one or more available media. The available media can be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., high-density digital video discs (DVDs)), or semiconductor media (e.g., solid-state disks (SSDs)).

[0185] Those skilled in the art will understand that the various numerical designations such as "first," "second," etc., involved in this application are merely for the convenience of description and are not intended to limit the scope of the embodiments of this application, nor do they indicate the order of sequence.

[0186] At least one in this application can also be described as one or more, and multiple can be two, three, four or more, and this application does not impose any limitation. In the embodiments of this application, for a technical feature, the technical features in that technical feature are distinguished by "first", "second", "third", "A", "B", "C" and "D", and there is no order or size among the technical features described by "first", "second", "third", "A", "B", "C" and "D".

[0187] As used herein, the terms "machine-readable medium" and "computer-readable medium" refer to any computer program product, device, and / or apparatus (e.g., disk, optical disk, memory, programmable logic device (PLD)) used to provide machine instructions and / or data to a programmable processor, including machine-readable media that receive machine instructions as machine-readable signals. The term "machine-readable signal" refers to any signal used to provide machine instructions and / or data to a programmable processor.

[0188] The systems and technologies described herein can be implemented in computing systems that include backend components (e.g., as a data server), or computing systems that include middleware components (e.g., an application server), or computing systems that include frontend components (e.g., a user computer with a graphical user interface or web browser through which a user can interact with embodiments of the systems and technologies described herein), or any combination of such backend, middleware, or frontend components. The components of the system can be interconnected via digital data communication of any form or medium (e.g., a communication network). Examples of communication networks include local area networks (LANs), wide area networks (WANs), and the Internet.

[0189] Computer systems can include clients and servers. Clients and servers are generally located far apart and typically interact through communication networks. Client-server relationships are created by computer programs running on the respective computers and having a client-server relationship with each other.

[0190] It should be understood that the various forms of processes shown above can be used to rearrange, add, or delete steps. For example, the steps described in this application can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this application can be achieved, and this is not limited herein.

[0191] Furthermore, it should be understood that the various embodiments described in this application can be implemented individually or in combination with other embodiments, where the scheme allows.

[0192] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments claimed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0193] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0194] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A method for transmitting a reference signal, characterized in that, Applied to transmitting user equipment (UE), the method includes: Obtain a set of time and frequency resources configured for a reference signal, wherein the reference signal is used for beam management of sidelink communication, and the set of time and frequency resources is configured based on the time and frequency resources in the direct-connect resource pool of the sidelink. Wherein, the time-frequency resource set and the first time-frequency resource set used for the transmission of the Physical Direct Control Channel (PSCCH) are orthogonal, and the time-frequency resources used by the reference signal in the time-frequency resource set and the time-frequency resources used for the transmission of the PSCCH are time-division multiplexed; The time-frequency resource set and the second time-frequency resource set used for Physical Direct Shared Channel (PSSCH) transmission are orthogonal, and the time-frequency resources used by the reference signal in the time-frequency resource set and the time-frequency resources used for PSSCH transmission are time-division multiplexed. When there are no time and frequency resources for the Physical Direct Feedback Channel (PSFCH) in the direct resource pool, the time and frequency resource set supports periodic resource configuration, and the time and frequency resources used by the reference signal occupy the last part of the OFDM symbols of the cross-link orthogonal frequency division multiplexing (OFDM) symbols, and the OFDM symbol preceding the last part of the OFDM symbols is the automatic gain control (AGC) symbol of the reference signal. The reference signal is transmitted via a side link using time and frequency resources from the set of time and frequency resources.

2. The method according to claim 1, characterized in that, When there are time and frequency resources for the Physical Direct Feedback Channel (PSFCH) in the direct resource pool, the time and frequency resources used by the reference signal in the time and frequency resource set and the time and frequency resources used for PSFCH transmission are frequency division multiplexed.

3. The method according to claim 2, characterized in that, The reference signal uses the same time-domain period and time-domain offset value as the time-frequency resource configuration of the PSFCH, such that the time-frequency resources used by the reference signal and the time-frequency resources of the PSFCH appear in the same time domain and occupy the same orthogonal frequency division multiplexing (OFDM) symbols as the PSFCH. The time-domain offset value is a time-domain offset value relative to the system frame number SFN0 or the direct frame number DFN0.

4. The method according to claim 2, characterized in that, The time-domain resource information of the reference signal is the same as the time-domain resource information of the PSFCH, and the frequency-domain resource information of the reference signal is pre-configured or configured through downlink control signaling.

5. The method according to any one of claims 1 to 4, characterized in that, The time and frequency resource set supports the transmission of reference signals sent by multiple different UEs within the same time slot through time domain multiplexing, frequency domain multiplexing, or code domain multiplexing.

6. The method according to any one of claims 1 to 4, characterized in that, The step of using time and frequency resources autonomously selected from the set of time and frequency resources to perform side link transmission of the reference signal includes: According to the downlink control signaling sent by the base station, or the direct connection control signaling sent by the UE, or the UE autonomously selecting time and frequency resources from the time and frequency resource set, and using the selected time and frequency resources for side link transmission of the reference signal.

7. The method according to claim 6, characterized in that, The downlink control signaling includes one of the following: Radio Resource Control (RRC) signaling; Media Access Layer Control Element (MAC CE); Downlink Control Information (DCI).

8. The method according to claim 6, characterized in that, The direct connection control signaling includes one of the following: Side link RRC signaling; MAC CE; Direct control information (SCI).

9. The method according to any one of claims 1 to 4, characterized in that, The reference signal includes one of the following: Channel State Information Reference Signal (CSI-RS); Direct connection to synchronous information block S-SSB; Detection reference signal SRS.

10. A method for transmitting a reference signal, characterized in that, The method, applied to receiving a user equipment (UE), includes: A reference signal is received for transmission on the side-link, wherein the reference signal is used for beam management of the side-link communication, and the reference signal is transmitted using time-frequency resources in a time-frequency resource set configured for the reference signal, the time-frequency resource set being configured based on time-frequency resources in a direct-connection resource pool of the side-link. Wherein, the time-frequency resource set and the first time-frequency resource set used for the transmission of the Physical Direct Control Channel (PSCCH) are orthogonal, and the time-frequency resources used by the reference signal in the time-frequency resource set and the time-frequency resources used for the transmission of the PSCCH are time-division multiplexed; The time-frequency resource set and the second time-frequency resource set used for Physical Direct Shared Channel (PSSCH) transmission are orthogonal, and the time-frequency resources used by the reference signal in the time-frequency resource set and the time-frequency resources used for PSSCH transmission are time-division multiplexed. When there are no time and frequency resources for the Physical Direct Feedback Channel (PSFCH) in the direct resource pool, the time and frequency resource set supports periodic resource configuration, and the time and frequency resources used by the reference signal occupy the last part of the OFDM symbols of the cross-link orthogonal frequency division multiplexing (OFDM) symbols, and the OFDM symbol preceding the last part of the OFDM symbols is the automatic gain control (AGC) symbol of the reference signal.

11. The method according to claim 10, characterized in that, When there are time and frequency resources for the Physical Direct Feedback Channel (PSFCH) in the direct resource pool, the time and frequency resources used by the reference signal in the time and frequency resource set and the time and frequency resources used for PSFCH transmission are frequency division multiplexed.

12. The method according to claim 11, characterized in that, The reference signal uses the same time-domain period and time-domain offset value as the time-frequency resource configuration of the PSFCH, such that the time-frequency resources used by the reference signal and the time-frequency resources of the PSFCH appear in the same time domain and occupy the same orthogonal frequency division multiplexing (OFDM) symbols as the PSFCH. The time-domain offset value is a time-domain offset value relative to the system frame number SFN0 or the direct frame number DFN0.

13. The method according to claim 10, characterized in that, The time-domain resource information of the reference signal is the same as the time-domain resource information of the PSFCH, and the frequency-domain resource information of the reference signal is pre-configured or configured through downlink control signaling.

14. The method according to any one of claims 10 to 12, characterized in that, The time and frequency resource set supports the transmission of reference signals sent by multiple different UEs within the same time slot through time domain multiplexing, frequency domain multiplexing, or code domain multiplexing.

15. The method according to any one of claims 10 to 12, characterized in that, The reference signal is transmitted based on downlink control signaling sent by the base station, or direct connection control signaling sent by the UE, or by the UE autonomously selecting time and frequency resources from the time and frequency resource set.

16. The method according to claim 15, characterized in that, The downlink control signaling includes one of the following: Radio Resource Control (RRC) signaling; Media Access Layer Control Element (MAC CE); Downlink Control Information (DCI).

17. The method according to claim 15, characterized in that, The direct connection control signaling includes one of the following: Side link RRC signaling; MAC CE; Direct control information (SCI).

18. The method according to any one of claims 10 to 12, characterized in that, The reference signal includes one of the following: Channel State Information Reference Signal (CSI-RS); Direct connection to synchronous information block S-SSB; Detection reference signal SRS.

19. A reference signal transmission device, characterized in that, The apparatus is used for transmitting user equipment (UE), and includes: The acquisition module is configured to acquire a set of time and frequency resources configured for a reference signal, wherein the reference signal is used for beam management of sidelink communication, and the set of time and frequency resources is configured based on the time and frequency resources in the direct-connect resource pool of the sidelink. Wherein, the time-frequency resource set and the first time-frequency resource set used for the transmission of the Physical Direct Control Channel (PSCCH) are orthogonal, and the time-frequency resources used by the reference signal in the time-frequency resource set and the time-frequency resources used for the transmission of the PSCCH are time-division multiplexed; The time-frequency resource set and the second time-frequency resource set used for Physical Direct Shared Channel (PSSCH) transmission are orthogonal, and the time-frequency resources used by the reference signal in the time-frequency resource set and the time-frequency resources used for PSSCH transmission are time-division multiplexed. When there are no time and frequency resources for the Physical Direct Feedback Channel (PSFCH) in the direct resource pool, the time and frequency resource set supports periodic resource configuration, and the time and frequency resources used by the reference signal occupy the last part of the OFDM symbols of the cross-link orthogonal frequency division multiplexing (OFDM) symbols, and the OFDM symbol preceding the last part of the OFDM symbols is the automatic gain control (AGC) symbol of the reference signal. The transmitting module is configured to use time and frequency resources selected autonomously from the set of time and frequency resources to perform side link transmission of the reference signal.

20. A reference signal transmission device, characterized in that, The apparatus is used to receive a user equipment (UE), and includes: A receiving module is configured to receive a reference signal transmitted on the side link, wherein the reference signal is used for beam management of the side link communication, and the reference signal is transmitted using time and frequency resources in a time and frequency resource set configured for the reference signal, the time and frequency resource set being configured based on time and frequency resources in a direct-connection resource pool of the side link. Wherein, the time-frequency resource set and the first time-frequency resource set used for the transmission of the Physical Direct Control Channel (PSCCH) are orthogonal, and the time-frequency resources used by the reference signal in the time-frequency resource set and the time-frequency resources used for the transmission of the PSCCH are time-division multiplexed; The time-frequency resource set and the second time-frequency resource set used for Physical Direct Shared Channel (PSSCH) transmission are orthogonal, and the time-frequency resources used by the reference signal in the time-frequency resource set and the time-frequency resources used for PSSCH transmission are time-division multiplexed. When there are no time and frequency resources for the Physical Direct Feedback Channel (PSFCH) in the direct resource pool, the time and frequency resource set supports periodic resource configuration, and the time and frequency resources used by the reference signal occupy the last part of the OFDM symbols of the cross-link orthogonal frequency division multiplexing (OFDM) symbols, and the OFDM symbol preceding the last part of the OFDM symbols is the automatic gain control (AGC) symbol of the reference signal.

21. A communication device, wherein, include: transceiver; Memory; The processor, connected to the transceiver and the memory respectively, is configured to control the wireless signal transmission and reception of the transceiver by executing computer-executable instructions on the memory, and is capable of implementing the method of any one of claims 1 to 18.

22. A computer storage medium, wherein, The computer storage medium stores computer-executable instructions; when executed by a processor, the computer-executable instructions can implement the method of any one of claims 1 to 18.

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