Method and apparatus in wireless communication system

Abstract

Disclosed are a method and apparatus in a wireless communication system, the method comprising: receiving at least one reference signal from a second UE; measuring the at least one reference signal; and transmitting, to the second UE, first information related to at least one of the following: at least one preferred beam, and at least one set of time resources, the at least one set of time resources being associated with at least one first beam.

Description

Technical Field

[0001] The present invention relates to the field of wireless communication technology, and more particularly to a method and device in a wireless communication system. Background Art

[0002] In order to meet the increased demand for wireless data communication services since the deployment of 4G communication systems, efforts have been made to develop improved 5G or quasi-5G communication systems. Therefore, 5G or quasi-5G communication systems are also referred to as "super 4G networks" or "post-LTE systems."

[0003] 5G communication systems are implemented in higher frequency (millimeter wave, mmWave) bands, such as the 60 GHz band, to achieve higher data rates. In order to reduce the propagation loss of radio waves and increase the transmission distance, beamforming, massive multiple-input multiple-output (MIMO), full-dimensional MIMO (FD-MIMO), array antennas, analog beamforming, and massive antenna technology are discussed in 5G communication systems.

[0004] In addition, in the 5G communication system, development of system network improvements is underway based on advanced small cells, cloud radio access networks (RAN), ultra-dense networks, device-to-device (D2D) communication, wireless backhaul, mobile networks, collaborative communications, coordinated multi-point (CoMP), receiving-end interference cancellation, etc.

[0005] In 5G systems, hybrid FSK and QAM modulation (FQAM) and sliding window superposition coding (SWSC) as advanced coded modulation (ACM), and filter bank multi-carrier (FBMC), non-orthogonal multiple access (NOMA) and sparse code multiple access (SCMA) as advanced access technologies have been developed. Summary of the invention

[0006] According to an embodiment of the present disclosure, a method performed by a first user equipment UE in a wireless communication system is provided, including: receiving at least one reference signal from a second UE; measuring the at least one reference signal; and sending first information related to at least one of the following to the second UE: at least one preferred beam, and at least one time resource set, wherein the at least one time resource set is associated with at least one first beam.

[0007] In some embodiments, the at least one reference signal is sent on at least one second beam, and measuring the at least one reference signal includes measuring the at least one second beam.

[0008] In some embodiments, the first information also includes at least one of the following: measurement information related to at least one reference signal, second information indicating at least one third beam, wherein the at least one third beam is selected by the first UE from at least one second beam, and the at least one third beam is at least one beam used for bypass transmission between the first UE and the second UE, and third information indicating at least one fourth beam, wherein the at least one fourth beam includes at least one of the at least one preferred beam and the at least one third beam.

[0009] In some embodiments, the first UE indicates the at least one preferred beam in the first information by at least one of the following: including a beam set in the first information, the beam set including a preferred beam; including N beam measurement information in the first information, at least one or each of the N beam measurement information including at least information for indicating a beam and information indicating whether the beam is a preferred beam, wherein N is an integer greater than or equal to 1; including N beam measurement information and information for indicating whether the N beam measurement information are preferred beams in the first information; and according to preset and / or preconfigured criteria, including information related to the preferred beam in the first information, but not including information related to other beams.

[0010] In some embodiments, the first information indicates that the at least one preferred beam is based on at least one of the following: the first UE is preset and / or preconfigured to indicate only preferred beams and / or to indicate preferred and non-preferred beams, the first UE is preset and / or preconfigured to preferentially indicate a preferred beam, and the process performed by the first UE is one of initial beam acquisition, beam maintenance, and beam failure recovery.

[0011] In some embodiments, the method also includes: determining whether at least one fifth beam of the first UE and / or at least one second beam of the second UE is used as at least one of the at least one preferred beam and the at least one third beam, and / or determining whether at least one fifth beam and / or at least one third beam is indicated by the first information, wherein the at least one fifth beam is at least one beam for bypass transmission between the first UE and the second UE determined based on the result of the measurement.

[0012] In some embodiments, the determining comprises at least one of the following:

[0013] Determining that the M beams with the best measurement results are indicated by the first information, where M is an integer greater than or equal to 1,

[0014] determining the M beams with the best measurement results as at least one preferred beam and / or the at least one third beam and / or the at least one fourth beam and / or the at least one fifth beam indicated by the first information,

[0015] determining that the M beams for which the measurement result exceeds the first threshold are indicated by the first information,

[0016] determining that the M beams whose measurement results exceed a second threshold are indicated by the first information as at least one preferred beam and / or the at least one third beam and / or the at least one fourth beam and / or the at least one fifth beam,

[0017] Determining that the N beams with the worst measurement results are indicated by the first information,

[0018] Determining the N beams with the worst measurement results as non-preferred beams is indicated by the first information, where N is an integer greater than or equal to 0,

[0019] determining that the N beams for which the measurement result is lower than a third threshold are indicated by the first information,

[0020] Determining that the N beams whose measurement results are lower than a fourth threshold, or higher than a fifth threshold and lower than the fourth threshold are indicated by the first information as non-preferred beams, and

[0021] Determine a beam that has been selected for communication with other UEs and / or a beam that has been indicated to other UEs as a preferred or selected beam as at least one preferred beam and / or indicated by the first information.

[0022] In some implementations, the first information indicates the at least one time resource set by indicating at least one of the following:

[0023] the time domain location of each time resource in at least one set of time resources,

[0024] Information about periodic time resources or periodic time windows,

[0025] information of at least one time window, including at least one of the following items of the time window: a starting position, an ending position, a length, an offset between the starting position and / or the ending position of the time window and a time point for sending the first information, and

[0026] Information related to the Discontinuous Reception (DRX) timer.

[0027] In some embodiments, the first information indicating the at least one time resource set includes: indicating at least one beam corresponding to the at least one time resource set through the third information.

[0028] In some embodiments, indicating at least one beam corresponding to the at least one time resource set through the third information includes at least one of the following: indicating the beam associated with each time resource set in the at least one time resource set by one beam corresponding to one time resource set, and / or indicating the beam associated with multiple time resource sets in the at least one time resource set by one beam corresponding to multiple time resource sets; and indicating the beam corresponding to the at least one time resource set or the beam corresponding to each time resource set in the at least one time resource set based on preset criteria, or by explicit indication, or by implicit indication.

[0029] In some embodiments, the method further comprises at least one of the following:

[0030] In a case where the first UE indicates the at least one time resource set to the second UE, receiving bypass transmission using at least one currently used receive beam on at least one time resource in the at least one time resource set, and / or sending bypass transmission using at least one currently used transmit beam on at least one time resource in the at least one time resource set;

[0031] receiving a bypass transmission with the at least one receive beam on at least one time resource in the at least one time resource set, upon the first UE indicating to the second UE the at least one set of time resources and at least one receive beam of the first UE corresponding to the at least one set of time resources;

[0032] In a case where the first UE indicates the at least one set of time resources and the at least one transmit beam of the first UE corresponding to the at least one set of time resources to the second UE, transmitting a bypass transmission using the at least one transmit beam on at least one time resource in the at least one set of time resources; and

[0033] In a case where the first UE indicates to the second UE the at least one time resource set and at least one transmit beam of the first UE corresponding to the at least one time resource set, when the first UE sends a bypass signal or channel to the second UE on at least one time resource in the at least one time resource set, information related to the transmit beam used is not indicated.

[0034] In some implementations, the first UE is triggered to measure the at least one reference signal and / or send the first information to the second UE when at least one of the following conditions is met:

[0035] The first UE sends, to the second UE, a signaling for requesting the second UE to send a reference signal measurement,

[0036] The first UE sends a signaling for requesting the second UE to send a reference signal measurement, and receives a reference signal available for measurement from the second UE,

[0037] The first UE receives signaling from the second UE requesting the first UE to send the first information,

[0038] The first UE obtains at least one resource location indicated by the second UE for sending the first information,

[0039] The first UE receives a resource set indicated by the second UE for measurement and / or for sending the at least one reference signal,

[0040] The first UE receives a resource set indicated by the second UE for measuring and / or sending the at least one reference signal, and receives a reference signal available for measurement from the second UE,

[0041] The first UE is preset and / or pre-configured with a periodic measurement window,

[0042] The first UE obtains at least one measurement window,

[0043] The first UE measures at least K reference signals in a measurement window, where K is an integer greater than or equal to 1,

[0044] The first UE measures resources corresponding to at least K reference signals in a measurement window,

[0045] The first UE obtains at least K measurement results whose measurement values ​​meet a threshold range,

[0046] At least one measurement window of the first UE ends,

[0047] A measurement value of at least one second beam of the second UE by the first UE is lower than a seventh threshold, and / or is lower than the seventh threshold for at least P1 times in a row, and / or is lower than the seventh threshold for at least P1 times within a specific time window, and

[0048] A physical bypass shared channel (PSSCH) transmission between the first UE and the second UE fails.

[0049] In some implementations, the first UE is triggered to send, to the second UE, signaling for requesting the second UE to send reference signal measurement when at least one of the following conditions is met:

[0050] The first UE is preset and / or pre-configured with a periodic measurement window,

[0051] The first UE obtains at least one measurement window,

[0052] At least one measurement window of the first UE has started, or will start after at least t1 time units, or will start after at most t2 time units,

[0053] a measurement value of the first UE for at least one second beam of the second UE is lower than a seventh threshold, and / or is lower than the seventh threshold for at least P1 times in a row, and / or is lower than the seventh threshold for at least P1 times within a specific time window,

[0054] receiving a measurement value of at least one fifth beam of the first UE by the second UE, and the measurement value is lower than a seventh threshold, and / or is lower than the seventh threshold at least P1 times in succession, and / or is lower than the seventh threshold at least P1 times within a specific time window, and

[0055] PSSCH transmission between the first UE and the second UE fails.

[0056] In some embodiments, the at least one first beam, the at least one second beam, the at least one third beam, the at least one fourth beam, the at least one fifth beam, and the at least one preferred beam include at least one transmit beam of the first UE, at least one receive beam of the first UE, at least one transmit beam of the second UE, and at least one receive beam of the second UE.

[0057] According to an embodiment of the present disclosure, a method performed by a second user equipment UE in a wireless communication system is provided, including: sending at least one reference signal to a first UE; and receiving first information related to at least one of the following from the first UE: at least one preferred beam, and at least one time resource set, wherein the at least one time resource set is associated with at least one first beam.

[0058] In some embodiments, the at least one reference signal is sent on at least one second beam.

[0059] In some embodiments, the first information also includes at least one of the following: measurement information related to at least one reference signal, second information indicating at least one third beam, wherein the at least one third beam is selected by the first UE from at least one second beam, and the at least one third beam is at least one beam used for bypass transmission between the first UE and the second UE, and third information indicating at least one fourth beam, wherein the at least one fourth beam includes at least one of the at least one preferred beam and the at least one third beam.

[0060] In some embodiments, the method also includes at least one of the following: sending signaling to the first UE for requesting the first UE to send the first information; indicating at least one resource location to the first UE for sending the first information to the first UE; and determining at least one sixth beam for bypass transmission with the first UE based on the first information.

[0061] In some embodiments, when at least one of the following conditions is met, the second UE is triggered to send the at least one reference signal to the first UE, and / or receive the first information from the first UE, and / or send signaling to the first UE for requesting the first UE to send the first information, and / or indicate at least one resource location to the first UE for the first UE to send the first information, and / or determine at least one sixth beam for communicating with the first UE based on the first information:

[0062] The second UE receives signaling from the first UE for requesting the second UE to send a reference signal measurement,

[0063] The second UE indicates to the first UE a resource set for measurement and / or for sending the at least one reference signal,

[0064] the second UE indicates to the first UE a resource set for measurement and / or for sending the at least one reference signal and sends the at least one reference signal on the resource set,

[0065] The second UE is preset and / or pre-configured with periodic resources,

[0066] The second UE acquires at least one resource, and the at least one resource can be used to send a reference signal for measurement by other UEs, or the at least one resource is preset or preconfigured or determined to be used to send a reference signal for measurement by other UEs,

[0067] The second UE is preset and / or pre-configured with a periodic sending window,

[0068] The first UE obtains at least one sending window,

[0069] The second UE sends at least K reference signals on resources in a specific time or frequency range,

[0070] The second UE obtains resources that can be used to send at least K reference signals,

[0071] At least one transmission window of the first UE has started, or will start after at least t1 time units, or will start after at most t2 time units,

[0072] At least one sending window of the second UE ends,

[0073] a measurement value of at least one fifth beam of the first UE by the second UE is lower than a seventh threshold, and / or is lower than the seventh threshold for at least P1 times in succession, and / or is lower than the seventh threshold for at least P1 times within a specific time window, wherein the at least one fifth beam is at least one beam determined based on a result of the measurement,

[0074] receiving a measurement value of at least one second beam of the second UE by the first UE, and the measurement value is lower than a seventh threshold, and / or is lower than the seventh threshold at least P1 times in succession, and / or is lower than the seventh threshold at least P1 times within a specific time window, and

[0075] A physical bypass shared channel (PSSCH) transmission between the first UE and the second UE fails.

[0076] In some embodiments, determining at least one sixth beam for communicating with the first UE based on the first information includes at least one of the following:

[0077] determining the at least one sixth beam among the at least one preferred beam;

[0078] determining the at least one sixth beam based on whether the measured value of the at least one reference signal exceeds a tenth threshold;

[0079] determining the at least one sixth beam based on whether there is a beam that has been selected by the second UE for communicating with other UEs among the beams indicated by the first information, and / or a beam that has been indicated by the second UE as a preferred or selected beam to other UEs;

[0080] Determine the at least one sixth beam according to whether the beam indicated by the first information has a corresponding sensing result; and

[0081] Whether to use the beam as the at least one sixth beam is determined based on whether there are time resources available for the first UE to send a bypass signal or channel to the second UE in the time resource set corresponding to the beam indicated by the first information.

[0082] In some embodiments, the method also includes indicating the determined at least one sixth beam to the first UE, wherein the indication includes at least one of the following: indicating in the bypass control information SCI the beam used by at least one physical bypass shared channel PSSCH associated with the SCI; and indicating in the media access control MAC control element CE the beam used by all bypass signals or channels within a given time range.

[0083] In some embodiments, the at least one first beam, the at least one second beam, the at least one third beam, the at least one fourth beam, the at least one fifth beam, the at least one sixth beam, and the at least one preferred beam include at least one of at least one transmit beam of the first UE, at least one receive beam of the first UE, at least one transmit beam of the second UE, and at least one receive beam of the second UE.

[0084] According to an embodiment of the present disclosure, a user equipment UE is provided, comprising: a transceiver; and a controller coupled to the transceiver and configured to execute the aforementioned method. BRIEF DESCRIPTION OF THE DRAWINGS

[0085] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings of the embodiments are briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present disclosure, but are not intended to limit the present disclosure. In the drawings:

[0086] Figure 1 A schematic diagram illustrating an example wireless network according to various embodiments of the present disclosure is shown;

[0087] Figure 2a and Figure 2b Example wireless transmit and receive paths are shown according to various embodiments of the present disclosure;

[0088] Figure 3a An example user equipment (UE) according to various embodiments of the present disclosure is shown;

[0089] Figure 3b An example gNB according to various embodiments of the present disclosure is shown;

[0090] Figure 4 A flowchart of a method performed by a UE according to various embodiments of the present disclosure is shown; and

[0091] Figure 5 A block diagram showing a configuration of a UE according to various embodiments of the present disclosure is shown. DETAILED DESCRIPTION

[0092] The following description with reference to the accompanying drawings is provided to facilitate a comprehensive understanding of the various embodiments of the present disclosure as defined by the claims and their equivalents. This description includes various specific details to facilitate understanding but should be considered as exemplary only. Therefore, one of ordinary skill in the art will recognize that various changes and modifications can be made to the various embodiments described herein without departing from the scope and spirit of the present disclosure. In addition, for the sake of clarity and conciseness, descriptions of well-known functions and structures may be omitted.

[0093] The terms and expressions used in the following specification and claims are not limited to their dictionary meanings, but are merely used by the inventor to enable a clear and consistent understanding of the present disclosure. Therefore, it should be apparent to those skilled in the art that the following description of various embodiments of the present disclosure is provided for illustration purposes only and not for the purpose of limiting the present disclosure as defined in the appended claims and their equivalents.

[0094] It should be understood that the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. Thus, for example, reference to "a component surface" includes reference to one or more of such surfaces.

[0095] The term "include" or "may include" refers to the presence of the corresponding disclosed functions, operations or components that can be used in various embodiments of the present disclosure, rather than limiting the presence of one or more additional functions, operations or features. In addition, the term "include" or "have" may be interpreted as indicating certain characteristics, numbers, steps, operations, constituent elements, components or combinations thereof, but should not be interpreted as excluding the possibility of the presence of one or more other characteristics, numbers, steps, operations, constituent elements, components or combinations thereof.

[0096] The term "or" used in various embodiments of the present disclosure includes any of the listed terms and all combinations thereof. For example, "A or B" may include A, may include B, or may include both A and B.

[0097] Unless defined differently, all terms (including technical terms or scientific terms) used in the present disclosure have the same meanings as understood by those skilled in the art described in the present disclosure. Common terms as defined in dictionaries are interpreted as having meanings consistent with the context in the relevant technical field, and should not be interpreted ideally or overly formally unless clearly defined in the present disclosure.

[0098] Figure 1An example wireless network 100 is shown in accordance with various embodiments of the present disclosure. Figure 1 The embodiment of the wireless network 100 shown in FIG. 1 is for illustration only. Other embodiments of the wireless network 100 can be used without departing from the scope of the present disclosure.

[0099] Wireless network 100 includes gNodeB (gNB) 101, gNB 102, and gNB 103. gNB 101 communicates with gNB 102 and gNB 103. gNB 101 also communicates with at least one Internet Protocol (IP) network 130, such as the Internet, a private IP network, or other data network.

[0100] Depending on the network type, other well-known terms such as "base station" or "access point" can be used instead of "gNodeB" or "gNB". For convenience, the terms "gNodeB" and "gNB" are used in this patent document to refer to network infrastructure components that provide wireless access to remote terminals. Also, depending on the network type, other well-known terms such as "mobile station", "subscriber station", "remote terminal", "wireless terminal" or "user device" can be used instead of "user equipment" or "UE". For convenience, the terms "user equipment" and "UE" are used in this patent document to refer to a remote wireless device that wirelessly accesses a gNB, whether the UE is a mobile device (such as a mobile phone or smartphone) or a commonly thought of fixed device (such as a desktop computer or vending machine).

[0101] gNB 102 provides wireless broadband access to network 130 for a first plurality of user equipment (UE) within coverage area 120 of gNB 102. The first plurality of UEs include: UE 111, which may be located in a small business (SB); UE 112, which may be located in an enterprise (E); UE 113, which may be located in a WiFi hotspot (HS); UE 114, which may be located in a first residence (R); UE 115, which may be located in a second residence (R); UE 116, which may be a mobile device (M), such as a cellular phone, a wireless laptop, a wireless PDA, etc. gNB 103 provides wireless broadband access to network 130 for a second plurality of UEs within coverage area 125 of gNB 103. The second plurality of UEs include UE 115 and UE 116. In some embodiments, one or more of gNBs 101-103 may be capable of communicating with each other and with UEs 111-116 using 5G, long term evolution (LTE), LTE-A, WiMAX, or other advanced wireless communication technologies.

[0102] The dashed lines illustrate the approximate extents of coverage areas 120 and 125, which are shown as approximately circular for purposes of illustration and explanation only. It should be clearly understood that coverage areas associated with gNBs, such as coverage areas 120 and 125, can have other shapes, including irregular shapes, depending on the configuration of the gNB and variations in the radio environment associated with natural and man-made obstacles.

[0103] As described in more detail below, one or more of gNB 101, gNB 102, and gNB 103 include a 2D antenna array as described in embodiments of the present disclosure. In some embodiments, one or more of gNB 101, gNB 102, and gNB 103 support codebook design and structure for a system with a 2D antenna array.

[0104] although Figure 1 One example of a wireless network 100 is shown, but Figure 1 Various changes may be made. For example, wireless network 100 can include any number of gNBs and any number of UEs in any suitable arrangement. Also, gNB 101 can communicate directly with any number of UEs and provide those UEs with wireless broadband access to network 130. Similarly, each gNB 102-103 can communicate directly with network 130 and provide UEs with direct wireless broadband access to network 130. In addition, gNBs 101, 102, and / or 103 can provide access to other or additional external networks, such as an external telephone network or other type of data network.

[0105] Figure 2a and Figure 2b Example wireless transmit and receive paths according to the present disclosure are shown. In the following description, transmit path 200 can be described as being implemented in a gNB (such as gNB 102) and receive path 250 can be described as being implemented in a UE (such as UE 116). However, it should be understood that receive path 250 can be implemented in a gNB and transmit path 200 can be implemented in a UE. In some embodiments, receive path 250 is configured to support codebook design and structure for a system with a 2D antenna array as described in embodiments of the present disclosure.

[0106] The transmit path 200 includes a channel coding and modulation block 205, a serial to parallel (S to P) block 210, an N-point inverse fast Fourier transform (IFFT) block 215, a parallel to serial (P to S) block 220, an add cyclic prefix block 225, and an upconverter (UC) 230. The receive path 250 includes a downconverter (DC) 255, a remove cyclic prefix block 260, a serial to parallel (S to P) block 265, an N-point fast Fourier transform (FFT) block 270, a parallel to serial (P to S) block 275, and a channel decoding and demodulation block 280.

[0107] In the transmit path 200, the channel coding and modulation block 205 receives a set of information bits, applies coding (such as low-density parity check (LDPC) coding), and modulates the input bits (such as using quadrature phase shift keying (QPSK) or quadrature amplitude modulation (QAM)) to generate a sequence of frequency-domain modulation symbols. The serial-to-parallel (S-to-P) block 210 converts (such as demultiplexes) the serial modulation symbols into parallel data to generate N parallel symbol streams, where N is the number of IFFT / FFT points used in the gNB 102 and the UE 116. The N-point IFFT block 215 performs an IFFT operation on the N parallel symbol streams to generate a time-domain output signal. The parallel-to-serial block 220 converts (such as multiplexes) the parallel time-domain output symbols from the N-point IFFT block 215 to generate a serial time-domain signal. The add cyclic prefix block 225 inserts a cyclic prefix into the time-domain signal. The up-converter 230 modulates (such as up-converts) the output of the add cyclic prefix block 225 to an RF frequency for transmission via a wireless channel. The signal can also be filtered at baseband before conversion to RF frequency.

[0108] The RF signal transmitted from gNB 102 arrives at UE 116 after passing through a wireless channel, and an operation opposite to that at gNB 102 is performed at UE 116. Downconverter 255 downconverts the received signal to a baseband frequency, and remove cyclic prefix block 260 removes the cyclic prefix to generate a serial time-domain baseband signal. Serial-to-parallel block 265 converts the time-domain baseband signal into a parallel time-domain signal. N-point FFT block 270 performs an FFT algorithm to generate N parallel frequency-domain signals. Parallel-to-serial block 275 converts the parallel frequency-domain signals into a sequence of modulated data symbols. Channel decoding and demodulation block 280 demodulates and decodes the modulated symbols to recover the original input data stream.

[0109] Each of gNBs 101-103 may implement a transmit path 200 similar to that for transmitting in the downlink to UEs 111-116 and may implement a receive path 250 similar to that for receiving in the uplink from UEs 111-116. Similarly, each of UEs 111-116 may implement a transmit path 200 for transmitting in the uplink to gNBs 101-103 and may implement a receive path 250 for receiving in the downlink from gNBs 101-103.

[0110] Figure 2a and Figure 2b Each of the components in can be implemented using hardware only, or a combination of hardware and software / firmware. As a specific example, Figure 2a and Figure 2b At least some of the components in can be implemented with software, while other components can be implemented by configurable hardware or a mixture of software and configurable hardware. For example, FFT block 270 and IFFT block 215 can be implemented as a configurable software algorithm, in which the value of the number of points N can be modified according to the implementation.

[0111] In addition, although described as using FFT and IFFT, this is illustrative only and should not be construed as limiting the scope of the present disclosure. Other types of transforms can be used, such as discrete Fourier transform (DFT) and inverse discrete Fourier transform (IDFT) functions. It should be understood that for DFT and IDFT functions, the value of variable N can be any integer (such as 1, 2, 3, 4, etc.), while for FFT and IFFT functions, the value of variable N can be any integer as a power of 2 (such as 1, 2, 4, 8, 16, etc.).

[0112] although Figure 2a and Figure 2b An example of a wireless transmit and receive path is shown, but the Figure 2a and Figure 2b Make various changes. For example, Figure 2a and Figure 2b The various components in can be combined, further subdivided or omitted, and additional components can be added according to specific needs. Figure 2a and Figure 2b It is intended to illustrate examples of the types of transmit and receive paths that can be used in a wireless network. Any other suitable architecture can be used to support wireless communications in a wireless network.

[0113] Figure 3a An example UE 116 according to the present disclosure is shown. Figure 3a The embodiment of UE 116 shown in FIG. 1 is for illustration only, and Figure 1UEs 111-115 can have the same or similar configurations. However, UEs have a variety of configurations, and Figure 3a The scope of the present disclosure is not limited to any particular implementation of the UE.

[0114] UE 116 includes antenna 305, radio frequency (RF) transceiver 310, transmit (TX) processing circuit 315, microphone 320, and receive (RX) processing circuit 325. UE 116 also includes speaker 330, processor / controller 340, input / output (I / O) interface 345, input device(s) 350, display 355, and memory 360. Memory 360 includes operating system (OS) 361 and one or more applications 362.

[0115] The RF transceiver 310 receives incoming RF signals from the antenna 305 transmitted by the gNB of the wireless network 100. The RF transceiver 310 downconverts the incoming RF signals to generate an intermediate frequency (IF) or baseband signal. The IF or baseband signal is sent to the RX processing circuit 325, where the RX processing circuit 325 generates a processed baseband signal by filtering, decoding and / or digitizing the baseband or IF signal. The RX processing circuit 325 sends the processed baseband signal to the speaker 330 (such as for voice data) or to the processor / controller 340 (such as for web browsing data) for further processing.

[0116] The TX processing circuit 315 receives analog or digital voice data from the microphone 320, or receives other outgoing baseband data (such as network data, email, or interactive video game data) from the processor / controller 340. The TX processing circuit 315 encodes, multiplexes, and / or digitizes the outgoing baseband data to generate a processed baseband or IF signal. The RF transceiver 310 receives the outgoing processed baseband or IF signal from the TX processing circuit 315 and up-converts the baseband or IF signal to an RF signal that is transmitted via the antenna 305.

[0117] The processor / controller 340 can include one or more processors or other processing devices and execute an OS 361 stored in the memory 360 to control the overall operation of the UE 116. For example, the processor / controller 340 can control the reception of forward channel signals and the transmission of reverse channel signals through the RF transceiver 310, the RX processing circuit 325, and the TX processing circuit 315 according to well-known principles. In some embodiments, the processor / controller 340 includes at least one microprocessor or microcontroller.

[0118] The processor / controller 340 is also capable of executing other processes and programs resident in the memory 360, such as operations for channel quality measurement and reporting for a system with a 2D antenna array as described in the embodiments of the present disclosure. The processor / controller 340 is capable of moving data into or out of the memory 360 as needed for the executed process. In some embodiments, the processor / controller 340 is configured to execute applications 362 based on the OS 361 or in response to signals received from the gNB or operator. The processor / controller 340 is also coupled to the I / O interface 345, where the I / O interface 345 provides the UE 116 with the ability to connect to other devices such as laptops and handheld computers. The I / O interface 345 is the communication path between these accessories and the processor / controller 340.

[0119] Processor / controller 340 is also coupled to input device(s) 350 and display 355. An operator of UE 116 can input data into UE 116 using input device(s) 350. Display 355 can be a liquid crystal display or other display capable of presenting text and / or at least limited graphics (such as from a website). Memory 360 is coupled to processor / controller 340. A portion of memory 360 can include random access memory (RAM), while another portion of memory 360 can include flash memory or other read-only memory (ROM).

[0120] although Figure 3a An example of UE 116 is shown, but it is possible to Figure 3a Make various changes. For example, Figure 3a The various components in can be combined, further subdivided, or omitted, and additional components can be added according to specific needs. As a specific example, processor / controller 340 can be divided into multiple processors, such as one or more central processing units (CPUs) and one or more graphics processing units (GPUs). Moreover, although Figure 3a The UE 116 is shown configured as a mobile phone or smart phone, but the UE can be configured to operate as other types of mobile or stationary devices.

[0121] Figure 3b An example gNB 102 according to the present disclosure is shown. Figure 3b The embodiment of the gNB 102 shown in FIG. is for illustration only, and Figure 1 Other gNBs can have the same or similar configurations. However, gNBs have a variety of configurations, and Figure 3b The scope of the present disclosure is not limited to any particular implementation of the gNB. It should be noted that gNB 101 and gNB 103 can include the same or similar structure as gNB 102.

[0122] like Figure 3b As shown in FIG. 1 , gNB 102 includes multiple antennas 370a-370n, multiple RF transceivers 372a-372n, transmit (TX) processing circuitry 374, and receive (RX) processing circuitry 376. In some embodiments, one or more of the multiple antennas 370a-370n include a 2D antenna array. gNB 102 also includes a controller / processor 378, a memory 380, and a backhaul or network interface 382.

[0123] The RF transceivers 372a-372n receive incoming RF signals from the antennas 370a-370n, such as signals transmitted by a UE or other gNB. The RF transceivers 372a-372n downconvert the incoming RF signals to generate IF or baseband signals. The IF or baseband signals are sent to the RX processing circuitry 376, which generates processed baseband signals by filtering, decoding, and / or digitizing the baseband or IF signals. The RX processing circuitry 376 sends the processed baseband signals to the controller / processor 378 for further processing.

[0124] The TX processing circuit 374 receives analog or digital data (such as voice data, network data, email, or interactive video game data) from the controller / processor 378. The TX processing circuit 374 encodes, multiplexes, and / or digitizes the outgoing baseband data to generate a processed baseband or IF signal. The RF transceivers 372a-372n receive the outgoing processed baseband or IF signals from the TX processing circuit 374 and up-convert the baseband or IF signals to RF signals that are transmitted via the antennas 370a-370n.

[0125] The controller / processor 378 can include one or more processors or other processing devices that control the overall operation of the gNB 102. For example, the controller / processor 378 can control the reception of forward channel signals and the transmission of reverse channel signals through the RF transceivers 372a-372n, the RX processing circuitry 376, and the TX processing circuitry 374 in accordance with well-known principles. The controller / processor 378 can also support additional functionality, such as more advanced wireless communication functionality. For example, the controller / processor 378 can perform a Blind Interference Sensing (BIS) process, such as performed through a Blind Interference Sensing (BIS) algorithm, and decode a received signal with an interference signal subtracted. The controller / processor 378 can support any of a variety of other functions in the gNB 102. In some embodiments, the controller / processor 378 includes at least one microprocessor or microcontroller.

[0126] The controller / processor 378 can also execute programs and other processes resident in the memory 380, such as a basic OS. The controller / processor 378 can also support channel quality measurement and reporting for systems with 2D antenna arrays as described in embodiments of the present disclosure. In some embodiments, the controller / processor 378 supports communications between entities such as web RTC. The controller / processor 378 can move data into or out of the memory 380 as needed by the executing process.

[0127] The controller / processor 378 is also coupled to a backhaul or network interface 382. The backhaul or network interface 382 allows the gNB 102 to communicate with other devices or systems via a backhaul connection or via a network. The backhaul or network interface 382 can support communication via any suitable (multiple) wired or wireless connections. For example, when the gNB 102 is implemented as part of a cellular communication system (such as a cellular communication system supporting 5G or new radio access technology or NR, LTE or LTE-A), the backhaul or network interface 382 can allow the gNB 102 to communicate with other gNBs via a wired or wireless backhaul connection. When the gNB 102 is implemented as an access point, the backhaul or network interface 382 can allow the gNB 102 to communicate with a larger network (such as the Internet) via a wired or wireless local area network or via a wired or wireless connection. The backhaul or network interface 382 includes any suitable structure that supports communication via a wired or wireless connection, such as an Ethernet or RF transceiver.

[0128] The memory 380 is coupled to the controller / processor 378. A portion of the memory 380 can include RAM, while another portion of the memory 380 can include flash memory or other ROM. In some embodiments, a plurality of instructions such as a BIS algorithm are stored in the memory. The plurality of instructions are configured to cause the controller / processor 378 to perform the BIS process and decode the received signal after subtracting at least one interference signal determined by the BIS algorithm.

[0129] As described in more detail below, the transmit and receive paths of the gNB 102 (implemented using the RF transceivers 372a-372n, the TX processing circuitry 374, and / or the RX processing circuitry 376) support aggregated communications with FDD cells and TDD cells.

[0130] although Figure 3b An example of a gNB 102 is shown, but the Figure 3b For example, gNB 102 can include any number of Figure 3a. As a specific example, an access point can include a number of backhaul or network interfaces 382, ​​and the controller / processor 378 can support routing functions to route data between different network addresses. As another specific example, while shown as including a single instance of TX processing circuitry 374 and a single instance of RX processing circuitry 376, the gNB 102 can include multiple instances of each (such as one for each RF transceiver).

[0131] In the Long Term Evolution (LTE) technology, bypass communication includes two main mechanisms: direct communication from device to device (D2D) and vehicle to vehicle / infrastructure / pedestrian / network (V2X). V2X is designed based on D2D technology and is superior to D2D in terms of data rate, latency, reliability, link capacity, etc. It is the most representative bypass communication technology in LTE technology. In the 5G system, bypass communication currently mainly includes vehicle to the outside world (V2X) communication.

[0132] As an evolutionary technology of LTE, the 5G NR system also includes the further evolution of bypass communication, and has developed NR V2X technology. As an evolutionary version of LTE V2X technology, NR V2X has better performance in all aspects. The 5GNR system is expected to further expand the application scenarios of NR V2X to other broader application scenarios, such as commercial bypass communication and public safety (PS) scenarios. The evolution of bypass communication includes unlicensed frequency bands, FR2, carrier aggregation, co-channel coexistence with LTE, and support for other field technologies such as positioning.

[0133] In an embodiment of the present application, the information configured by the base station, indicated by signaling, configured by a high layer, and pre-configured includes a group of configuration information; it also includes multiple groups of configuration information, from which the UE selects a group of configuration information for use according to predefined conditions; it also includes a group of configuration information containing multiple subsets, from which the UE selects a subset for use according to predefined conditions.

[0134] In the embodiments of the present application, below a threshold may be replaced by below or equal to a threshold, above (exceeding) a threshold may be replaced by above or equal to a threshold, below or equal to a threshold may be replaced by below, and above or equal to a threshold may be replaced by above; and vice versa.

[0135] Some of the technical solutions provided in the embodiments of the present application are specifically described based on the V2X system, but their application scenarios should not be limited to the V2X system in bypass communication, but can also be applied to other bypass transmission systems. For example, the design based on the V2X subchannel in the following embodiments can also be used for the D2D subchannel or other bypass transmission subchannels. The V2X resource pool in the following embodiments can also be replaced by a D2D resource pool in other bypass transmission systems such as D2D.

[0136] In an embodiment of the present application, when the bypass communication system is a V2X system, the terminal or UE may be various types of terminals or UEs such as a vehicle, infrastructure, or pedestrian.

[0137] The base station in this specification may also be replaced by other nodes, such as bypass nodes, and a specific example is a roadside station (infrastructure) UE in a bypass system. Any mechanism applicable to the base station in this embodiment may also be similarly used in the scenario where the base station is replaced by other bypass nodes, and no further description will be given.

[0138] The time slot in this specification may also be replaced by a time unit, the candidate time slot may also be replaced by a candidate time unit, and the candidate single time slot resource may also be replaced by a candidate single time unit resource. The time unit includes a specific time length, such as a number of consecutive symbols.

[0139] The time slots in this specification can be subframes or time slots in the physical sense, or subframes or time slots in the logical sense. Specifically, the subframes or time slots in the logical sense are the subframes or time slots corresponding to the resource pool of bypass communication. For example, in a V2X system, the resource pool is defined by a repeated bitmap, which is mapped to a specific set of time slots. The specific set of time slots can be all time slots, or all other time slots except certain specific time slots (such as time slots for transmitting MIB (Master Information Block) / SIB (System Information Block)). The time slots indicated as "1" in the bitmap can be used for V2X transmission and belong to the time slots corresponding to the V2X resource pool; the time slots indicated as "0" cannot be used for V2X transmission and do not belong to the time slots corresponding to the V2X resource pool.

[0140] The following is an example of a typical application scenario to illustrate the difference between the subframe or time slot in the physical sense or the logical sense: when calculating the time domain interval (gap) between two specific channels / messages (for example, the PSSCH carrying bypass data and the PSFCH carrying corresponding feedback information), it is assumed that the interval is N time slots. If the subframe or time slot in the physical sense is calculated, the N time slots correspond to an absolute time length of N*x milliseconds in the time domain, where x is the time length of the physical time slot (subframe) under the numerology of the scenario, in milliseconds; otherwise, if the subframe or time slot in the logical sense is calculated, taking the bypass resource pool defined by the bitmap as an example, the interval of N time slots corresponds to N time slots indicated as "1" in the bitmap, and the absolute time length of the interval varies with the specific configuration of the bypass communication resource pool and does not have a fixed value.

[0141] Furthermore, the time slot in this specification can be a complete time slot or a number of symbols corresponding to the bypass communication in a time slot. For example, when the bypass communication is configured to be performed on the X1-X2 symbols in each time slot, the time slot in the following embodiments is the X1-X2 symbols in the time slot in this scenario; or, when the bypass communication is configured as a mini-slot transmission, the time slot in the following embodiments is a mini-slot defined or configured in the bypass system, rather than a time slot in the NR system; or, when the bypass communication is configured as a symbol-level transmission, the time slot in the following embodiments may be replaced by a symbol, or may be replaced by N symbols as the time domain granularity of the symbol-level transmission.

[0142] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0143] In this specification, the UE obtains configuration or obtains a predefined / (pre)configured parameter, including at least one of obtaining from a higher layer, obtaining from a base station, and obtaining from other UEs. For example, the second UE indicates a parameter to the first UE through higher layer signaling and / or physical layer signaling, which can be understood in this specification as the first UE obtaining the configuration of the parameter from the second UE.

[0144] In this specification, when a UE obtains or uses a threshold, the threshold may be predefined and / or configured. For a configured threshold, the configuration may be at least one of a high-level configuration (e.g., an RRC / MAC configuration), a base station configuration, a configuration from other UEs, and a pre-configuration.

[0145] In this specification, a time slot may also be replaced by other time units, such as an OFDM symbol, a mini-time slot, a subframe, an OFDM symbol, etc. A subchannel may also be replaced by other frequency domain units, such as a PRB, etc.

[0146] The text and drawings are provided as examples only to help readers understand the present disclosure. They are not intended and should not be interpreted as limiting the scope of the present disclosure in any way. Although certain embodiments and examples have been provided, it is obvious to those skilled in the art based on what is disclosed herein that the embodiments and examples shown may be changed without departing from the scope of the present disclosure.

[0147] In the bypass communication systems of LTE and NR, the bypass communication systems are designed mainly based on the needs of specific D2D and vehicle business scenarios, and the frequency bands used are mainly concentrated in low frequencies, such as the ITS frequency band dedicated to vehicle traffic on FR1. With the development of 5G technology, the business model of bypass communication is growing, so it is necessary to enhance the bypass communication technology so that it can be applied to a wider range of application scenarios, such as XR, IIoT, RedCap, etc. For the business needs of some future application scenarios, the transmission rate, delay and reliability that can be achieved by the current bypass communication technology need to be further enhanced. A feasible method is to introduce features such as beams in bypass communication to increase the transmission rate and reliability that the bypass system can support by increasing the bandwidth, and reduce the service transmission delay. However, the current bypass communication system has not explored the possibility of bypass communication using beams, nor has it introduced any enhancement mechanism for beams.

[0148] When a bypass communication system uses beams for communication, the communicating UEs need to acquire and maintain beams, and it is also necessary to select beams for receiving or transmitting during bypass communication. Therefore, it is necessary to introduce a method for determining beams during beam acquisition, beam maintenance and / or beam failure recovery.

[0149] In a bypass communication system using a beam, if wireless communication is required between a first UE and a second UE, both the first UE and the second UE need to determine a beam for communicating with each other, and use the beam to send and receive a bypass signal / channel to and from the other party. The beam further includes a transmit beam and a receive beam of each of the first UE and the second UE.

[0150] The UE can usually determine the beam based on the measurement results of the beam. One method of measuring the beam is that the transmitting UE transmits a reference signal with its transmitting beam, the receiving UE measures the reference signal and provides feedback to the transmitting UE, and both parties select the beam corresponding to the reference signal with the best communication quality based on the measurement results. The reference signal can be at least one of S-SSB, CSI-RS, and DMRS; in this specification, the reference signal can also be replaced by other bypass signals / channels, for example, replaced by at least one of PSCCH, PSSCH, and PSFCH. For the convenience of description, the reference signal is still used for explanation below.

[0151] In the bypass system of FR1, since beam measurement is not required, CSI-RS can usually be used to measure the channel quality of the FR1 air interface. For the purpose of saving overhead, it is limited to be sent together with data multiplexed on the same time-frequency resources. At least in the bypass system of FR2, in order to support the increase in the number of CSI-RSs brought about by the demand for beam measurement, and to more flexibly send and receive CSI-RSs to achieve the purpose of real-time channel measurement, in addition to the CSI-RS multiplexed in data transmission in FR1, also known as non-independent CSI-RS, it is also necessary to support CSI-RS that may not be multiplexed with data, also known as independent CSI-RS. This CSI-RS can be transmitted on the same time slot and subchannel as PSCCH and PSFCH, and may also be transmitted on the same time slot and subchannel as PSSCH. This PSSCH can be used to send second-order SCI, and can be used to send high-level control information that does not belong to data, such as MAC CE.

[0152] The process of UE determining the beam includes initial beam acquisition, beam maintenance, beam failure recovery, etc. Initial beam acquisition can be the process of initially determining the communication beam between communicating UEs. The process usually includes the UEs of both communicating parties performing beam scanning, acquiring at least one beam that can receive the other party's UE, and starting communication based on the beam. Beam maintenance can be the process of further maintaining whether the beam is available and / or optimizing a beam with better performance after the initial beam is acquired between the communicating UEs. The process usually includes the UEs of both communicating parties continuing to perform beam scanning, measuring and reporting the scanned beams, and selecting a better beam as the beam used for subsequent communication between UEs based on the reporting results. Compared with the initial beam acquisition, the number of scanned beams can be smaller during the beam maintenance process, for example, only a few candidate beams with better performance are maintained; or a wider beam can be used for scanning during the initial beam acquisition process, and a thinner beam can be used for further beam optimization during the beam maintenance process. The beam failure recovery process includes at least one of the communicating UEs detecting that the communication quality is poor (for example, the RS measurement result of the other communicating UE is lower than the threshold or continues to be lower than the threshold, the data channel transmission continues to be unsuccessful, etc.), triggering the reselection of the beam, and sending a beam failure recovery request to the other UE, indicating the reselected beam; the other UE can send a response signal / channel according to the reselected beam indicated by the beam failure recovery request after receiving the beam failure recovery request. If the response signal / channel is successfully received, it can be considered that the communication beam is updated to the reselected beam, and the beam failure recovery process ends.

[0153] For ease of description, the bypass UEs of communication are referred to as the first UE and the second UE, which are a pair of UEs that have established a communication connection. In any embodiment of this specification, the first UE may be one UE or multiple UEs, for example, a group of UEs corresponding to one multicast ID; similarly, the second UE may be one or more UEs. Both the first UE and the second UE may be a data transmitting UE and / or a data receiving UE.

[0154] Figure 4 A flowchart of a method performed by a UE according to various embodiments of the present disclosure is shown.

[0155] In step S401, the first UE receives at least one reference signal from the second UE. In step S402, the first UE measures at least one reference signal. In step S403, the first UE sends to the second UE first information related to at least one of the following: at least one preferred beam, and at least one time resource set, wherein the at least one time resource set is associated with at least one first beam. Through the above process, the first UE and the second UE can determine a beam suitable for bypass transmission, or determine a beam suitable for bypass transmission in a specific time resource.

[0156] Specifically, the second UE sends at least one reference signal to the first UE. The first UE measures the reference signal from the second UE, and obtains a measurement result corresponding to the reference signal or a measurement result corresponding to the beam that sends the reference signal. In an exemplary embodiment, the first UE sends first information to the second UE based on the measurement result, and the first information includes at least one beam measurement information; the second UE selects at least one beam for communication with the first UE based on the beam measurement information reported by the first UE. The method in this example can be used in a beam maintenance process. In another exemplary embodiment, the first UE selects at least one beam for communication with the second UE based on the measurement result, and sends first information to the second UE, and the first information includes the selected beam; the second UE uses the beam to communicate with the first UE based on the information of the beam indicated by the first UE. The method in this example can be used in a beam failure recovery process.

[0157] In the above method, the measurement result obtained by the first UE and the first UE reporting beam measurement information or selecting a beam and indicating the selected beam may belong to the same or different processes. For example, the first UE measures the reference signal from the second UE and obtains the measurement result during the beam maintenance process, and can use the measurement result obtained during the beam maintenance process to select a beam and indicate the selected beam to the second UE during the beam failure recovery process.

[0158] In the above method, the first UE sends first information to the second UE according to the measurement result, and the content of the first information includes at least one of the following:

[0159] The information can be used to indicate at least one beam through the following information for indicating a beam and / or information related to the beam; further including at least one of information of CSI-RS resources, information of S-SSB, beam index, TCI state, and QCL information; wherein the information of CSI-RS resources includes at least one of the information of the ID, index, time domain position, frequency domain position, RE position, and sequence used by the CSI-RS resource; the information of S-SSB includes at least one of the S-SSB index, S-SSB resource position (including time domain position and / or frequency domain position), sequence used by the S-SSB, and information indicated in the PSBCH corresponding to the S-SSB; wherein the beam can be at least one of the transmit beam of the first UE, the receive beam of the first UE, the transmit beam of the second UE, and the receive beam of the second UE; wherein indicating a beam through information of CSI-RS resources and / or S-SSB resources can be understood as the indicated beam being a beam used for transmission and / or reception on the indicated CSI-RS resources and / or S-SSB resources;

[0160] The measurement value includes at least one of the following: L1-RSRP, L1-SINR, and hypothetical bypass channel BLER; wherein, for the hypothetical bypass channel BLER, the bypass channel may be a bypass signal and / or a bypass channel, including at least one of the following: PSCCH, PSSCH, PSBCH, first-order SCI, second-order SCI, S-SSB; further, for the hypothetical BLER of PSCCH and / or first-order SCI and / or second-order SCI, the hypothetical value may be calculated based on a specific SCI format; for the hypothetical PSSCH BLER, the hypothetical value may be calculated based on at least one of a specific MCS, TBS, frequency domain size, and time domain size; for the hypothetical PSBCH BLER, the hypothetical value may be calculated based on the content of a specific PSBCH;

[0161] at least one preferred beam;

[0162] at least one unpreferred beam;

[0163] the selected at least one beam for transmission between the first UE and the second UE;

[0164] At least one time resource set; wherein a time resource set may include one or more time resources. Optionally, each time resource set corresponds to at least one receiving beam of a first UE, indicating that the first UE may use the beam for reception on the time resources in the set, and / or corresponds to at least one transmitting beam of a first UE, indicating that the first UE may use the beam for transmission on the time resources in the set, and / or corresponds to at least one transmitting beam of a second UE, indicating that the second UE may use the beam for transmission on the time resources in the set, and / or corresponds to at least one transmitting beam of a second UE, indicating that the second UE may use the beam for reception on the time resources in the set.

[0165] Optionally, in the above method, for any one of at least one preferred beam, at least one non-preferred beam, and at least one beam for transmission between the first UE and the second UE indicated in the first information, the method of indicating the at least one beam may be indicated by the above-mentioned information for indicating the beam; optionally, the beam may be at least one of the transmitting beam of the first UE, the receiving beam of the first UE, the transmitting beam of the second UE, and the receiving beam of the second UE. Optionally, the beam may be determined based on at least one of the measurement result, the correspondence between the transmit and receive beams, and the correspondence between the communication beams of the first UE and the second UE, for example, determining the transmit beam of the second UE and / or the receive beam of the first UE based on the measurement result, and for another example, determining the receive beam of the first UE based on the determined transmit beam of the second UE and the correspondence between the transmit beam of the second UE and the receive beam of the first UE, and for another example, determining the receive beam of the second UE based on the transmit beam of the second UE and the correspondence between the transmit beam and the receive beam, and determining the transmit beam of the first UE based on the receive beam of the first UE and the correspondence between the transmit beam and the receive beam. Therefore, although in this example the first UE measures the transmit beam of the second UE, the beam indicated by the first UE to the second UE may be any one or more of the transmit beam of the first UE, the receive beam of the first UE, the transmit beam of the second UE, and the receive beam of the second UE.

[0166] Optionally, the first UE indicates at least one preferred beam and / or at least one non-preferred beam to the second UE through the first information, including indicating based on at least one of the following methods:

[0167] The first information includes a beam set (the beam set may also be replaced by at least one of the following: at least one beam, a subset of a specific / preset beam set, at least one beam group, at least one beam sub-group), and the beams included in the set are preferred beams or non-preferred beams. The method for indicating the beams in the set includes at least one of the following: indicating based on the information used to indicate the beams in the first information, for example, each beam in the set is indicated by a corresponding CSI-RS resource index, that is, the set can be understood as a set of CSI-RS resource indexes; and / or, the beams in the set are indicated based on the beams indicated in the first information, for example, the first information indicates a total of N beams (or N information used to indicate beams, similarly below), the set includes a bitmap with a length of N bits, each bit corresponds to one of the total N beams in sequence, and for another example, the first information indicates a total of N beams, the set includes a number of fields with a length of N' bits, each field indicates the order of a beam in the total N beams (for example, the first, the second, ...), where N' = log2 (N) or log2 (N) rounded up. In addition, the first UE and / or the second UE also need to distinguish whether the beam set is a set of preferred beams or a set of non-preferred beams. Optionally, according to a preset criterion, the beam set is a set of preferred beams or a set of non-preferred beams; and / or, a field is used to indicate that the beam set corresponds to a preferred beam or a non-preferred beam, for example, 1 bit, and / or a specific state value of a certain SCI field, and / or different SCI formats, and / or an index of a scrambling sequence, and / or different RNTIs;

[0168] The first information includes N beam measurement information (N is a positive integer greater than or equal to 1), and at least one or each of the N beam measurement information includes at least information for indicating a beam and information indicating whether the beam is a preferred beam. For example, each beam measurement information reported includes a CSI-RS resource index field, an L1-RSRP measurement value field, and a 1-bit field indicating a preferred / non-preferred beam;

[0169] The first information includes N beam measurement information (N is a positive integer greater than or equal to 1), and also includes indication information indicating whether the N beam measurement information are preferred or non-preferred beams; further, the indication information may be indicated by 1 bit, and / or a specific status value of a certain SCI field, and / or a different SCI format, and / or an index of an scrambling sequence, and / or a different RNTI. The difference compared to the above-mentioned method in which at least one or each of the N beam measurement information includes at least information for indicating a beam and whether the beam is a preferred beam is that the former method can be understood as using N bits (which can be an explicit field or an implicit indication method) to respectively indicate that the N beam measurement information correspond to preferred / non-preferred beams, and the method here can be understood as using 1 bit to indicate that all N beam measurement information correspond to preferred / non-preferred beams;

[0170] According to preset and / or (pre) configured criteria, the information reported by the first UE is all information of the preferred beam, or the information reported by the first UE is all information of the non-preferred beam.

[0171] Optionally, the method in which the first UE indicates at least one preferred beam and / or at least one non-preferred beam to the second UE through the first information may be indicated based on at least one of the following:

[0172] being preset and / or (pre)configured to indicate only preferred beams, and / or only non-preferred beams, and / or indicating both preferred and non-preferred beams;

[0173] Preset and / or (pre) configured to preferentially indicate a preferred beam, and optionally, when there is no preferred beam or the number of preferred beams is lower than a threshold, indicate other beams and / or non-preferred beams in the first information; or preset and / or (pre) configured to preferentially indicate a non-preferred beam, and optionally, when there is no non-preferred beam or the number of non-preferred beams is lower than a threshold, indicate other beams and / or preferred beams in the first information; wherein the threshold may be preset and / or (pre) configured;

[0174] The determination of indicating the preferred and / or non-preferred beams is based on which of the processes performed is initial beam acquisition, beam maintenance, or beam failure recovery.

[0175] Optionally, the first UE indicates information related to at least one beam in the first information, and / or indicates related information of at least one of a preferred beam, an unpreferred beam, and a beam selected for transmission between the first UE and the second UE, further including determining whether at least one beam of the first UE and / or at least one beam of the second UE can be used as any of the above beams and / or whether the related information thereof is included in the first information, and the determination method includes at least one of the following:

[0176] Determine that the M beams with the best corresponding measurement results (for example, the highest L1-RSRP / L1-SINR, the lowest assumed bypass channel BLER) are indicated in the first information, and / or determine that the M beams with the best corresponding measurement results are indicated in the first information as at least one preferred beam and / or a beam used for transmission between the first UE and the second UE, where M is a positive integer greater than or equal to 1. Optionally, the value of M and / or the maximum value and / or minimum value of M are preset and / or (pre)configured, and may be configured through configuration information of a higher layer / the second UE / the resource pool. Optionally, when the first UE indicates a preferred beam and / or a beam used for transmission between the first UE and the second UE to the second UE, and does not indicate a non-preferred beam, determine that the M beams with the best corresponding measurement results are indicated in the first information;

[0177] Determine that M beams whose corresponding measurement results exceed a first threshold are indicated in the first information, and / or determine that M beams whose corresponding measurement results exceed a second threshold are indicated in the first information as at least one preferred beam and / or a beam used for transmission between the first UE and the second UE, where M is a non-negative integer greater than or equal to 0. Optionally, at least one of the value of M, the maximum value of M, the minimum value of M, the first threshold, and the second threshold is preset and / or (pre) configured, and may be configured through configuration information of a higher layer / the second UE / the resource pool; the first threshold and the second threshold may be preset and / or (pre) configured separately, or preset and / or (pre) configured together (for example, configured through the same field), or one of them may be determined by the other, for example, the second threshold is the first threshold minus a preset / (pre) configured offset. Optionally, the M beams are all beams exceeding the threshold, or M beams selected from all beams exceeding the threshold (for example, when the number M1 of beams exceeding the threshold exceeds the configured value of M), and the selection may be randomly selected or selected according to other methods in the specification. Optionally, when the first UE indicates to the second UE a preferred beam and / or a beam used for transmission between the first UE and the second UE, and does not indicate a non-preferred beam, it is determined that the M beams whose corresponding measurement results exceed the first threshold are indicated in the first information;

[0178] Determine that the corresponding N beams with the worst measurement results are indicated in the first information, and / or determine that the corresponding N beams with the worst measurement results are indicated as non-preferred beams in the first information, where N is a non-negative integer greater than or equal to 0. Optionally, the value of N and / or the maximum value and / or minimum value of N are preset and / or (pre)configured, and can be configured through configuration information of a higher layer / the second UE / the resource pool. Optionally, when the first UE indicates non-preferred beams to the second UE, determine that the corresponding N beams with the worst measurement results are indicated in the first information;

[0179] Determine that N beams whose corresponding measurement results are lower than the third threshold are indicated in the first information, and / or determine that N beams whose corresponding measurement results are lower than the fourth threshold, or exceed the fifth threshold and lower than the fourth threshold are indicated in the first information as non-preferred beams, where N is a non-negative integer greater than or equal to 0. Optionally, at least one of the value of N, the maximum value of N, the minimum value of N, the third threshold, the fourth threshold, and the fifth threshold is preset and / or (pre) configured, and may be configured through configuration information of a higher layer / a second UE / a resource pool; the third threshold, the fourth threshold, and the fifth threshold may be preset and / or (pre) configured separately, and / or at least two of them may be preset and / or (pre) configured together (for example, configured through the same field), and / or one of them may be determined by at least one of the other, for example, the fourth threshold is the third threshold minus a preset / (pre) configured offset. Optionally, the N beams are all beams below the threshold, or N beams selected from all beams below the threshold (for example, when the number N1 of beams exceeding the threshold exceeds the configured value of N), and the selection may be randomly selected or selected according to other methods in the specification. Optionally, when the first UE indicates an unpreferred beam to the second UE, it is determined that the N beams whose corresponding measurement results are lower than the third threshold are indicated in the first information;

[0180] Determine that a beam that has been selected for communication with other UEs and / or a beam that has been indicated as a preferred / selected beam to other UEs is at least one preferred beam and / or is indicated in the first information. This method can be further combined with other methods in the specification. For example, when a beam has been selected for communication with other UEs and / or has been indicated as a preferred / selected beam to other UEs, and the beam belongs to one of the M beams with the best measurement results and / or the measurement result of the beam exceeds the first threshold, the beam is indicated in the first information as at least one preferred beam and / or the beam selected for transmission between the first UE and the second UE. Optionally, if the first UE determines that multiple beams have been selected for communication with other UEs and / or beams that have been indicated as preferred / selected beams to other UEs, one or M beams are further selected to be indicated in the first information, including selecting according to at least one of the following methods: selecting one or M beams with the best corresponding measurement results, selecting M beams whose corresponding measurement results exceed the first threshold, excluding (or not selecting) N beams with the worst corresponding measurement results, excluding (or not selecting) N beams whose corresponding measurement results are lower than the sixth threshold, selecting one or M beams with the largest number of UEs using them for communication, and selecting one or M beams with the largest number of UEs indicated as preferred / selected beams. The sixth threshold may be preset and / or (pre)configured with the first to fifth thresholds, or preset and / or (pre)configured together with at least one of the thresholds, or determined by other thresholds, for example, the sixth threshold is the first threshold minus a preset / (pre)configured offset.

[0181] Regarding the method in the above method for determining whether a beam is included in the first information and whether it is used as at least one preferred beam and / or selected as a beam for transmission between the first UE and the second UE based on whether the beam is selected for communication with other UEs and / or has been indicated as a preferred / selected beam to other UEs, further, the method can be used in combination with other methods, for example, using this method to determine a part of preferred beams, and using other methods to determine another part of preferred beams; for another example, using this method to determine K1 preferred beams indicated in the first information, and then using other methods to determine another M-K1 other beams indicated in the first information, the other beams can be included in the first information but not included in the set of preferred beams, or can be included in the first information and not indicated as preferred beams or indicated as non-preferred beams.

[0182] The method for determining whether a beam is included in the first information and whether it is used as at least one preferred beam and / or selected as a beam for transmission between the first UE and the second UE based on whether a beam is selected for communication with other UEs and / or has been indicated as a preferred / selected beam to other UEs in the above method has the following advantages: in the communication scenario between the base station and the UE, since the UE usually only needs to maintain one RRC connection with the base station (when the UE has multiple service cells, since the base stations of multiple service cells schedule resources separately, for each service cell, it can still be considered that the UE only maintains one RRC connection with the base station of the cell), the link quality reflected by the measured value can be used as the only criterion for selecting a communication beam between the base station and the UE, and other considerations can be ignored. However, in the bypass communication scenario between UEs, it is more common that a UE needs to maintain multiple RRC connections with multiple other UEs, including multiple RRC unicast connections and one or more RRC multicast connections. Therefore, different beams used between different RRC connections (i.e., different UE pairs) may conflict with each other. For example, UE0 selects to communicate with UE1 using transceiver beam #1 and communicate with UE2 using transceiver beam 2 based on link quality, but UE1 and UE2 select different frequency domain resources on the same time slot to send data to UE0. At this time, UE0's receive beams #1 and #2 conflict, and UE0 can only select one of receive beams #1 and #2 to receive data on this time slot, and may not be able to receive data corresponding to the other receive beam. Therefore, whether the beam is used to communicate with other UEs and / or has been indicated to other UEs as a preferred / selected beam as one of the criteria for selecting a beam can reduce the risk of beam conflict. The following is an example of receive beam conflict. UE0 selects to communicate with UE1 using transceiver beam #1 based on link quality. When determining the beam to be used with UE2, if the measurement results of receive beams #1 and #2 meet the conditions (for example, exceeding the first or second threshold), and receive beam #1 has been used to communicate with other UEs, receive beam #1 is selected accordingly as the communication beam with UE2, and the receive beam conflict in the previous example can be avoided. Similarly, since the UE cannot use different transmit beams to transmit multiple channels at the same time, the problem of transmit beam conflict may also occur in the bypass communication system. This method can similarly reduce the risk of transmit beam conflict.

[0183] Optionally, the first UE indicates at least one time resource set to the second UE through the first information, including indicating based on at least one of the following methods:

[0184] Indicating the time domain position of each resource in the set may be indicated by a similar field based on the method of indicating the time domain resource position in the SCI and / or the inter-UE cooperation information. Optionally, the first information also indicates at least one frequency domain resource position corresponding to each resource in the set, and the method may be understood as indicating at least one time-frequency resource set;

[0185] Indicating a periodic time resource or a periodic time window may be indicated by at least one of the following items of the time resource / time window: a starting position, an end position, a period, an offset (within the period), a length of the time window, a number of consecutive time resources included in the set, and a bitmap for indicating whether the time resource belongs to the set;

[0186] Indicating a time window, including indicating at least one of the following items of the time window: a starting position, an ending position, a length, an offset between the starting position and / or the ending position of the time window and a time point for sending the first information;

[0187] By multiplexing the discontinuous reception DRX mechanism, at least one time resource set is indicated by a DRX timer, wherein the DRX activation time corresponds to the resources included in the time resource set. The DRX timer may be configured separately from the existing DRX timer, for example, a corresponding new timer is configured for at least one beam through RRC to indicate the available (can be used for reception / transmission) and unavailable time of the beam.

[0188] Optionally, the first UE indicates, through first information, a beam corresponding to at least one time resource set to the second UE, including indicating through information used to indicate the beam, and further including at least one of the following methods:

[0189] Indicating a corresponding beam for each time resource set or multiple time resource sets in a one-to-one correspondence (e.g., one beam corresponds to one time resource set) or a one-to-many correspondence (e.g., one beam corresponds to multiple time resource sets); for example, indicating N time resource sets, indicating a corresponding beam information field for each set;

[0190] Based on a preset criterion, or through an explicit indication such as 1 bit or 2 bits, or through an implicit indication such as indicating the channel of the first information and / or the SCI format corresponding to the first information, indicate the beam corresponding to the at least one time resource set or the beam corresponding to each set of the at least one time resource set, and the beam can be at least one of the following: a transmitting beam of the first UE, a receiving beam of the first UE, a transmitting beam of the second UE, and a receiving beam of the second UE.

[0191] Optionally, if the first UE indicates at least one time resource set (and does not indicate the corresponding beam) to the second UE, it can be considered that the time resource set corresponds to at least one beam used in the current communication and can be used for receiving and / or sending time resources. In this case, the first UE uses the at least one receiving beam currently used for communication with the second UE on the time resource set to receive bypass transmission, and / or the second UE can use the at least one transmitting beam currently used for communication with the first UE on the time resource set to send bypass transmission to the first UE.

[0192] Optionally, if the first UE indicates at least one time resource set (and does not indicate the corresponding beam) to the second UE, it can be considered that the time resource set corresponds to at least one beam used in the current communication and can be used for receiving and / or sending time resources. In this case, the first UE uses the at least one transmitting beam currently used for communication with the second UE on the time resource set to send bypass transmission, and / or the second UE can use the at least one receiving beam currently used for communication with the first UE on the time resource set to receive bypass transmission from the first UE.

[0193] Optionally, if the first UE indicates at least one time resource set and at least one receive beam of the first UE and / or at least one transmit beam of the second UE corresponding to the set to the second UE, the first UE uses the at least one receive beam on the time resource set to receive bypass transmission, and / or the second UE may use the at least one transmit beam on the time resource set to send bypass transmission to the first UE.

[0194] Optionally, if the first UE indicates at least one time resource set and at least one transmit beam of the first UE and / or at least one receive beam of the second UE corresponding to the set to the second UE, the first UE uses the at least one transmit beam to send bypass transmission on the time resource set, and / or the second UE can use the at least one receive beam to receive bypass transmission from the first UE on the time resource set.

[0195] Optionally, if the first UE indicates to the second UE at least one time resource set and at least one receive beam of the first UE and / or at least one transmit beam of the second UE corresponding to the set, the second UE may not indicate information related to the transmit beam used when sending a bypass signal / channel to the first UE on the time resource set. And / or, if the first UE indicates to the second UE at least one time resource set and at least one transmit beam of the first UE and / or at least one receive beam of the second UE corresponding to the set, the first UE may not indicate information related to the transmit beam used when sending a bypass signal / channel to the second UE on the time resource set.

[0196] Optionally, if the time resource set and the beam are indicated by high-level signaling such as MAC CE or RRC signaling, after the first UE receives ACK feedback corresponding to the high-level signaling and / or the second UE sends ACK feedback corresponding to the high-level signaling, the first UE and / or the second UE can use the above-mentioned method of not indicating the relevant information of sending the beam; otherwise, if ACK feedback is not received / sent, or NACK feedback is received / sent, the first UE and / or the second UE cannot use the above-mentioned method of not indicating the relevant information of sending the beam.

[0197] Optionally, if the time resource set and the beam are indicated by high-level signaling such as MAC CE or RRC signaling, the first UE and / or the second UE may use the above method of not indicating the relevant information of sending the beam after a time point for sending the high-level signaling plus a time offset; and / or, within the time period from the time point for sending the high-level signaling to the time point for sending the high-level signaling plus the time offset, the first UE and / or the second UE cannot use the above method of not indicating the relevant information of sending the beam. The time offset may be preset and / or (pre) configured.

[0198] Optionally, when at least one of the following conditions is met, the first UE is triggered to measure a reference signal from the second UE and / or send the first information to the second UE:

[0199] The first UE sends a signaling for requesting the second UE to send a reference signal measurement to the second UE; or the first UE sends a signaling for requesting the second UE to send a reference signal measurement to the second UE and receives a reference signal available for measurement from the second UE;

[0200] receiving signaling from the second UE requesting the first UE to send the first information, and / or obtaining at least one resource location indicated by the second UE for sending the first information;

[0201] A resource set for measurement and / or for sending a reference signal indicated by a second UE is received, for example, a plurality of CSI-RS resources indicated are used for measurement of the first UE; or a resource set for measurement and / or for sending a reference signal indicated by a second UE is received, and a reference signal available for measurement is received from the second UE; optionally, the resource set indicated by the second UE is a resource set sent to the first UE, for example, a target ID (destination ID) in the SCI corresponding to the indication is the ID of the first UE;

[0202] The first UE is preset and / or (pre) configured with a periodic measurement window, and / or the first UE acquires at least one measurement window, and the at least one measurement window may be indicated by the second UE to the first UE;

[0203] The first UE measures at least K reference signals in the measurement window, where K is an integer greater than or equal to 1, and / or measures resources corresponding to at least K reference signals, and / or obtains at least K measurement results whose measurement values ​​meet a threshold range, wherein the threshold range may correspond to at least one of the first to sixth thresholds corresponding to the beam indicated by the first information in this specification; for example, the first UE measures the reference signal in the measurement window and obtains at least K measurement results whose L1-RSRP exceeds the first threshold;

[0204] At least one measurement window of the first UE ends; this method can be interpreted as the first UE attempting to measure a reference signal from the second UE in each or at least one measurement window, and reporting the measurement result through the first information after the measurement window ends; in a specific example, this method is used in combination with the previous method, that is, at least one measurement window of the first UE ends, and the first UE measures at least K reference signals and / or measures resources corresponding to at least K reference signals and / or obtains at least K measurement results whose measurement values ​​meet the threshold range in the at least one measurement window, then the first UE is triggered to send the first information to the second UE;

[0205] The measurement value of at least one beam of the second UE by the first UE is lower than the seventh threshold, and / or is lower than the seventh threshold for at least P1 times in a row, and / or is detected to be lower than the seventh threshold for at least P1 times within a time window whose length meets the eighth threshold range. P1 and / or the seventh threshold and / or the eighth threshold range may be preset and / or (pre) configured. The at least one beam may be a beam that has been used by the first UE to communicate with the second UE, or a beam corresponding thereto. For example, the beam used by the first UE to communicate with the second UE is the first UE's transmit beam #1, which corresponds to the first UE's receive beam #1 and the second UE's transmit beam #5. Then, when the measurement value of the first UE for the second UE's transmit beam #5 is lower than the seventh threshold, the condition is considered to be met;

[0206] The PSSCH transmission failure between the first UE and the second UE further includes at least P2 consecutive transmission / reception failures, and / or at least P2 transmission / reception failures are detected within a time window whose length meets the ninth threshold range. Among them, the transmission / reception failure includes at least one of receiving NACK, sending NACK, and not receiving ACK feedback (this condition may correspond to a PSSCH using other HARQ-ACK feedback methods other than NACK-only multicast). Among them, P2 and / or the ninth threshold range may be preset and / or (pre) configured. The eighth and ninth threshold ranges may be the same and / or configured together, or they may be different and / or configured separately.

[0207] Optionally, when at least one of the following conditions is met, the first UE is triggered to send, to the second UE, signaling for requesting the second UE to send reference signal measurement:

[0208] The first UE is preset and / or (pre) configured with a periodic measurement window, and / or the first UE acquires at least one measurement window, and the at least one measurement window may be indicated by the second UE to the first UE;

[0209] At least one measurement window of the first UE has started, or will start after at least t1 time units, or will start after at most t2 time units, where the time unit may be a physical time slot, or a logical time slot, or a physical time unit such as milliseconds;

[0210] The measurement value of at least one beam of the second UE by the first UE is lower than the seventh threshold, and / or is lower than the seventh threshold for at least P1 times in a row, and / or is detected to be lower than the seventh threshold for at least P1 times within a time window whose length meets the range of the eighth threshold; and / or, the measurement value of at least one beam of the first UE sent by the second UE is received, and the measurement value is lower than the seventh threshold, and / or is lower than the seventh threshold for at least P1 times in a row, and / or is detected to be lower than the seventh threshold for at least P1 times within a time window whose length meets the range of the eighth threshold. Wherein, P1 and / or the seventh threshold and / or the range of the eighth threshold may be preset and / or (pre) configured. Wherein, the at least one beam may be a beam that has been used by the first UE to communicate with the second UE, or a beam corresponding thereto. For example, the beam used by the first UE to communicate with the second UE is the first UE's transmit beam #1, which corresponds to the first UE's receive beam #1 and the second UE's transmit beam #5. Then, the measurement value of the first UE to the second UE's transmit beam #5 is considered to meet the condition when it is lower than the seventh threshold;

[0211] The PSSCH transmission failure between the first UE and the second UE further includes at least P2 consecutive transmission / reception failures, and / or at least P2 transmission / reception failures are detected within a time window whose length meets the ninth threshold range. Among them, the transmission / reception failure includes at least one of receiving NACK, sending NACK, and not receiving ACK feedback (this condition may correspond to a PSSCH using other HARQ-ACK feedback methods other than NACK-only multicast). Among them, P2 and / or the ninth threshold range may be preset and / or (pre) configured. The eighth and ninth threshold ranges may be the same and / or configured together, or they may be different and / or configured separately.

[0212] Optionally, when at least one of the following conditions is met, the second UE is triggered to send at least one reference signal to the first UE, and / or receive first information sent by the first UE, and / or send signaling for requesting the first UE to send the first information and / or indicate at least one resource location for the first UE to send the first information, and / or select at least one beam for communicating with the first UE based on the first information sent by the first UE:

[0213] The second UE receives a signaling from the first UE for requesting the second UE to send a reference signal measurement;

[0214] The second UE indicates a resource set for measurement and / or for sending a reference signal to the first UE, or indicates a resource set for measurement and / or for sending a reference signal to the first UE and sends a reference signal on the resource set; optionally, the indicated resource set is a resource set sent to the first UE, for example, a target ID (destination ID) in the SCI corresponding to the indication is the ID of the first UE;

[0215] The second UE is preset and / or (pre) configured with periodic resources, and / or the second UE acquires at least one resource, and the resource can be used to send a reference signal for measurement by other UEs, or the resource is preset / configured / determined to be used to send a reference signal for measurement by other UEs;

[0216] The second UE is preset and / or (pre) configured with a periodic sending window, and / or the first UE obtains at least one sending window, and the at least one sending window may be indicated by the second UE to the first UE; wherein the sending window is used for the second UE to send a reference signal therein, and the reference signal may be a reference signal for measurement by the first UE;

[0217] The second UE sends at least K reference signals on resources in a certain time and / or frequency range, and / or obtains resources that can be used to send at least K reference signals; wherein the time and / or frequency range may be preset and / or (pre) configured, and may correspond to a measurement window obtained by the first UE, and / or to a sending window obtained by the second UE;

[0218] At least one sending window of the first UE has started, or is about to start after at least t1 time units, or will start after at most t2 time units, where the time unit may be a physical time slot, or a logical time slot, or a physical time unit such as milliseconds; optionally, the condition is used to trigger the second UE to send at least one reference signal to the first UE;

[0219] At least one sending window of the second UE ends; optionally, the condition is used to trigger the second UE to receive the first information sent by the first UE, and / or send signaling for requesting the first UE to send the first information and / or indicate at least one resource location for the first UE to send the first information, and / or select at least one beam for communicating with the first UE based on the first information sent by the first UE;

[0220] The measurement value of at least one beam of the first UE by the second UE is lower than the seventh threshold, and / or is lower than the seventh threshold for at least P1 times in a row, and / or is detected to be lower than the seventh threshold for at least P1 times within a time window whose length meets the range of the eighth threshold; and / or, the measurement value of at least one beam of the second UE sent by the first UE is received, and the measurement value is lower than the seventh threshold, and / or is lower than the seventh threshold for at least P1 times in a row, and / or is detected to be lower than the seventh threshold for at least P1 times within a time window whose length meets the range of the eighth threshold. Wherein, P1 and / or the seventh threshold and / or the range of the eighth threshold may be preset and / or (pre) configured. Wherein, the at least one beam may be a beam that has been used by the second UE to communicate with the first UE, or a beam corresponding thereto. For example, the beam used by the second UE to communicate with the first UE is the second UE's transmit beam #5, which corresponds to the second UE's receive beam #5 and the first UE's transmit beam #1. Then, the measurement value of the second UE's transmit beam #1 of the first UE is considered to meet the condition when it is lower than the seventh threshold;

[0221] The PSSCH transmission failure between the first UE and the second UE further includes at least P2 consecutive transmission / reception failures, and / or at least P2 transmission / reception failures are detected within a time window whose length meets the ninth threshold range. Among them, the transmission / reception failure includes at least one of receiving NACK, sending NACK, and not receiving ACK feedback (this condition may correspond to a PSSCH using other HARQ-ACK feedback methods other than NACK-only multicast). Among them, P2 and / or the ninth threshold range may be preset and / or (pre) configured. The eighth and ninth threshold ranges may be the same and / or configured together, or they may be different and / or configured separately.

[0222] The at least one beam used for communicating with the first UE includes at least one transmitting beam used for communicating with the first UE and / or at least one receiving beam used for communicating with the first UE.

[0223] Optionally, for the conditions under which the first UE is triggered to measure the reference signal from the second UE and / or send the first information to the second UE, the conditions under which the first UE is triggered to send a signaling to the second UE requesting the second UE to send a reference signal measurement, and the conditions under which the second UE is triggered to send at least one reference signal to the first UE and / or receive the first information sent by the first UE and / or select at least one beam for communicating with the first UE based on the first information sent by the first UE, the thresholds and the number of times they appear in the conditions may be the same and / or configured together, for example, the seventh threshold in at least two types of conditions is the same; or they may be different and / or configured separately, for example, the seventh threshold in the three types of conditions is configured through three different fields in the RRC signaling.

[0224] Optionally, the second UE receives the first information sent by the first UE, and determines at least one beam for communicating with the first UE based on the first information. The at least one beam for communicating with the first UE includes at least one transmit beam for communicating with the first UE and / or at least one receive beam for communicating with the first UE.

[0225] Optionally, the second UE determines at least one beam for communicating with the first UE using at least one of the following first methods:

[0226] determining in the preferred beam indicated in the first information;

[0227] The determination is based on whether the measurement value corresponding to the beam indicated in the first information exceeds a tenth threshold, for example, in the beam exceeding the threshold, the determination is performed, the tenth threshold may be preset and / or (pre) configured, may be configured through configuration information of a higher layer / the first UE / the second UE / the resource pool, may be the same as the aforementioned various thresholds and / or configured together, or may be different and / or configured separately;

[0228] The determination is based on whether there is a beam that has been selected by the second UE for communicating with other UEs among the beams indicated in the first information, and / or a beam that has been indicated by the second UE as a preferred / selected beam to other UEs.

[0229] Optionally, the second UE determines at least one beam for communicating with the first UE using at least one of the following second methods:

[0230] determining, according to whether the beam indicated in the first information has a corresponding perception result; further, for at least one beam indicated in the first information and a time resource set corresponding thereto, determining, according to whether the second UE has a perception result corresponding to the beam and / or whether there is a corresponding (sufficient) perception result in a perception window corresponding to transmission on at least one time resource on the time resource set, whether to use the beam as at least one beam for communicating with the first UE;

[0231] For at least one beam indicated in the first information, whether to use the beam as at least one beam for communicating with the first UE is determined based on whether there are time resources in its corresponding time resource set that can be used by the first UE to send a bypass signal / channel to the second UE.

[0232] In a specific example, the second UE selects a beam indicated in the first information as a beam for communicating with the first UE, whose preference is indicated and whose corresponding measurement value exceeds the tenth threshold, and which has been selected by the second UE for communicating with other UEs and / or which has been indicated by the second UE as a preferred / selected beam to other UEs, if this beam exists in the first information (if there are multiple beams, they can be randomly selected from them); otherwise, select a beam indicated in the first information as a beam for communicating with the first UE, whose preference is indicated in the first information and whose corresponding measurement value exceeds the tenth threshold, if this beam exists in the first information (if there are multiple beams, they can be randomly selected from them); otherwise, select the preferred beam indicated in the first information (if there are multiple beams, they can be randomly selected from them).

[0233] The first method and the second method can be used in combination. In another specific example, the second UE determines at least one candidate beam according to at least one of the above conditions (based on the candidate beam, the subsequent method is an example of the combination of the first method and the second method), and / or uses the beam indicated in the first information as at least one candidate beam, and in the at least one candidate beam, uses the second method to determine at least one beam for communicating with the first UE, including: if at least N1 time-frequency resources or at least N2 time resources in the time resource set corresponding to a candidate beam can be used by the second UE to send PSSCH to the first UE, and the transmission on the at least N1 time-frequency resources or at least N2 time resources has (sufficient number of) perception results in the corresponding perception window, then the candidate beam can be used as a beam for communicating with the first UE, and / or the at least N1 time-frequency resources or at least N2 time resources can be used as resources for communicating with the first UE. Optionally, the UE further selects resources actually used to send PSSCH from the at least N1 time-frequency resources or the at least N2 time resources, and / or continues to select beams actually used to send PSSCH and / or other bypass signals / channels from the multiple candidate beams when there are multiple candidate beams that can be used as beams for communicating with the first UE, for example, based on perception selection or random selection. N1 and N2 are integers greater than or equal to 1, and at least one of the values ​​of N1 and N2, the maximum values ​​of N1 and N2, and the minimum values ​​of N1 and N2 is preset and / or (pre) configured, and can be configured through configuration information of a high layer / the first UE / the second UE / the resource pool. N1 and N2 can be the same and / or configured together, or different and / or configured separately.

[0234] Optionally, the second UE determines at least one beam for communicating with the first UE, and indicates the determined beam to the first UE. Further, indicating using at least one of the following methods:

[0235] Indicate in the SCI the beam used by at least one PSSCH associated with the SCI;

[0236] Indicate the beam used by all bypass signals / channels within a given time range in the MAC CE; optionally, when the beam used by the bypass signal / channel is additionally indicated, the beam used by the bypass signal / channel is the additionally indicated beam, rather than the beam indicated in the MAC CE. The starting position of the given time range may be determined according to the time point at which the MAC CE is located, for example, the time point plus the first time offset. The ending position of the given time range may be determined according to the time point at which the MAC CE is located or the time point at the starting position of the time range, for example, the time point plus the second time offset; or the ending position of the given time range is the time point at which the MAC CE indicating the beam is received next time, or the time point plus the first time offset; or the ending position of the given time range is infinite, that is, it is always effective. The first and / or second time offset may be preset and / or (pre) configured.

[0237] Among them, the indication beam can be indicated by at least one of TCI status, QCL information, and beam index.

[0238] Figure 5 A block diagram showing a configuration of a user equipment (UE) 500 according to various embodiments of the present disclosure is shown.

[0239] refer to Figure 5 According to various embodiments of the present disclosure, the UE 500 may include a transceiver 501 and a controller 502. For example, the transceiver 501 may be configured to send and receive signals. For example, the controller 502 may be coupled to the transceiver 501 and configured to perform the aforementioned method.

[0240] Those skilled in the art will appreciate that the above illustrative embodiments are described herein and are not intended to be limiting. It should be understood that any two or more of the embodiments disclosed herein may be combined in any combination. In addition, other embodiments may be utilized and other changes may be made without departing from the spirit and scope of the subject matter presented herein. It will be readily understood that the various aspects of the invention of the present disclosure as generally described herein and shown in the accompanying drawings may be arranged, replaced, combined, separated and designed in a variety of different configurations, all of which are contemplated herein.

[0241] Those skilled in the art will appreciate that the various illustrative logic boxes, modules, circuits, and steps described in the present application can be implemented as hardware, software, or a combination of the two. To clearly illustrate this interchangeability of hardware and software, various illustrative components, boxes, modules, circuits, and steps are described generally in the form of their function sets above. Whether such function sets are implemented as hardware or software depends on specific applications and the design constraints imposed on the overall system. Technicians can implement the described function sets in different ways for each specific application, but such design decisions should not be interpreted as causing a departure from the scope of the present application.

[0242] The various illustrative logic blocks, modules, and circuits described in this application may be implemented or executed with a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general purpose processor may be a microprocessor, but in an alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors cooperating with a DSP core, or any other such configuration.

[0243] The method or algorithm described in the present application can be directly embodied in hardware, in a software module executed by a processor, or in a combination of the two. The software module can reside in a RAM memory, a flash memory, a ROM memory, an EPROM memory, an EEPROM memory, a register, a hard disk, a removable disk, or any other form of storage medium known in the art. An exemplary storage medium is coupled to a processor so that the processor can read and write information from / to the storage medium. In an alternative, a storage medium can be integrated into a processor. The processor and the storage medium can reside in an ASIC. The ASIC can reside in a user terminal. In an alternative, the processor and the storage medium can reside in a user terminal as discrete components.

[0244] In one or more exemplary designs, the functions may be implemented in hardware, software, firmware, or any combination thereof. If implemented in software, the functions may be stored on or transmitted as one or more instructions or codes on a computer-readable medium. Computer-readable media include both computer storage media and communication media, the latter including any media that facilitates the transfer of a computer program from one place to another. Storage media may be any available media that can be accessed by a general or special purpose computer.

[0245] The above description is merely an exemplary embodiment of the present invention and is not intended to limit the protection scope of the present invention. The protection scope of the present invention is determined by the appended claims.

Claims

1. A method performed by a first user equipment UE in a wireless communication system, comprising: receiving at least one reference signal from a second UE; measuring the at least one reference signal; as well as sending first information related to at least one of the following to the second UE: at least one preferred beam, and at least one set of time resources, The at least one time resource set is associated with at least one first beam.

2. The method according to claim 1, wherein: The at least one reference signal is sent on at least one second beam, and measuring the at least one reference signal includes measuring the at least one second beam.

3. The method according to claim 1 or 2, wherein: The first information also includes at least one of the following: measurement information associated with at least one reference signal, second information indicating at least one third beam, wherein the at least one third beam is selected by the first UE from at least one second beam, the at least one third beam being at least one beam used for bypass transmission between the first UE and the second UE, and The at least one fourth beam includes at least one of the at least one preferred beam and the at least one third beam.

4. The method according to any one of claims 1 to 3, wherein: The first UE indicates the at least one preferred beam in the first information by at least one of the following: The first information includes a beam set, wherein the beam set includes a preferred beam; The first information includes N pieces of beam measurement information, at least one or each of the N pieces of beam measurement information includes at least information for indicating a beam and information indicating whether the beam is a preferred beam, wherein N is an integer greater than or equal to 1; The first information includes N beam measurement information and information indicating whether the N beam measurement information is a preferred beam; as well as According to a preset and / or preconfigured criterion, information related to the preferred beam is included in the first information, while information related to other beams is not included.

5. The method according to any one of claims 1 to 3, wherein: The first information indicates that the at least one preferred beam is based on at least one of the following: The first UE is preset and / or preconfigured to indicate only a preferred beam, and / or to indicate a preferred and non-preferred beam, The first UE is preset and / or preconfigured to preferentially indicate a preferred beam, and The process performed by the first UE is one of initial beam acquisition, beam maintenance, and beam failure recovery.

6. The method according to any one of claims 1 to 3, further comprising: Determine whether at least one fifth beam of the first UE and / or at least one second beam of the second UE is taken as at least one of the at least one preferred beam and the at least one third beam, and / or determine whether at least one fifth beam and / or at least one third beam is indicated by the first information, wherein the at least one fifth beam is at least one beam for bypass transmission between the first UE and the second UE determined based on the result of the measurement.

7. The method according to claim 6, wherein: The determination includes at least one of the following: Determining that the M beams with the best measurement results are indicated by the first information, where M is an integer greater than or equal to 1, determining the M beams with the best measurement results as at least one preferred beam and / or the at least one third beam and / or the at least one fourth beam and / or the at least one fifth beam indicated by the first information, determining that the M beams for which the measurement result exceeds the first threshold are indicated by the first information, determining that the M beams whose measurement results exceed a second threshold are indicated by the first information as at least one preferred beam and / or the at least one third beam and / or the at least one fourth beam and / or the at least one fifth beam, Determining that the N beams with the worst measurement results are indicated by the first information, Determining the N beams with the worst measurement results as non-preferred beams is indicated by the first information, where N is an integer greater than or equal to 0, determining that the N beams for which the measurement result is lower than a third threshold are indicated by the first information, Determining that the N beams whose measurement results are lower than a fourth threshold, or higher than a fifth threshold and lower than the fourth threshold are indicated by the first information as non-preferred beams, and Determine a beam that has been selected for communication with other UEs and / or a beam that has been indicated to other UEs as a preferred or selected beam as at least one preferred beam and / or indicated by the first information.

8. The method according to claim 1 or 2, wherein: The first information indicates the at least one time resource set by indicating at least one of the following: the time domain location of each time resource in at least one set of time resources, Information about periodic time resources or periodic time windows, information of at least one time window, including at least one of the following items of the time window: a starting position, an ending position, a length, an offset between the starting position and / or the ending position of the time window and a time point for sending the first information, and Information related to the Discontinuous Reception (DRX) timer.

9. The method according to any one of claims 1 to 3, wherein: The first information indicating the at least one time resource set includes: indicating at least one beam corresponding to the at least one time resource set through the third information.

10. The method according to claim 9, wherein: Indicating, by the third information, at least one beam corresponding to the at least one time resource set includes at least one of the following: Indicating the beam associated with each time resource set in the at least one time resource set by one beam corresponding to one time resource set, and / or indicating the beam associated with multiple time resource sets in the at least one time resource set by one beam corresponding to multiple time resource sets; as well as The beam corresponding to the at least one time resource set or the beam corresponding to each time resource set in the at least one time resource set is indicated based on a preset criterion, or through an explicit indication, or through an implicit indication.

11. The method according to claim 10, further comprising at least one of the following: In a case where the first UE indicates the at least one time resource set to the second UE, receiving bypass transmission using at least one currently used receive beam on at least one time resource in the at least one time resource set, and / or sending bypass transmission using at least one currently used transmit beam on at least one time resource in the at least one time resource set; receiving a bypass transmission with the at least one receive beam on at least one time resource in the at least one time resource set, upon the first UE indicating to the second UE the at least one set of time resources and at least one receive beam of the first UE corresponding to the at least one set of time resources; In a case where the first UE indicates to the second UE the at least one set of time resources and at least one transmit beam of the first UE corresponding to the at least one set of time resources, transmitting a bypass transmission using the at least one transmit beam on at least one time resource in the at least one set of time resources; as well as In a case where the first UE indicates to the second UE the at least one time resource set and at least one transmit beam of the first UE corresponding to the at least one time resource set, when the first UE sends a bypass signal or channel to the second UE on at least one time resource in the at least one time resource set, information related to the transmit beam used is not indicated.

12. The method according to any one of claims 1 to 3, wherein: When at least one of the following conditions is met, the first UE is triggered to measure the at least one reference signal and / or send the first information to the second UE: The first UE sends, to the second UE, a signaling for requesting the second UE to send a reference signal measurement, The first UE sends a signaling for requesting the second UE to send a reference signal measurement, and receives a reference signal available for measurement from the second UE. The first UE receives signaling from the second UE requesting the first UE to send the first information, The first UE obtains at least one resource location indicated by the second UE for sending the first information, The first UE receives a resource set indicated by the second UE for measurement and / or for sending the at least one reference signal, The first UE receives a resource set indicated by the second UE for measuring and / or sending the at least one reference signal, and receives a reference signal available for measurement from the second UE, The first UE is preset and / or pre-configured with a periodic measurement window, The first UE obtains at least one measurement window, The first UE measures at least K reference signals in a measurement window, where K is an integer greater than or equal to 1, The first UE measures resources corresponding to at least K reference signals in a measurement window, The first UE obtains at least K measurement results whose measurement values ​​meet a threshold range, At least one measurement window of the first UE ends, A measurement value of at least one second beam of the second UE by the first UE is lower than a seventh threshold, and / or is lower than the seventh threshold for at least P1 times in a row, and / or is lower than the seventh threshold for at least P1 times within a specific time window, and A physical bypass shared channel (PSSCH) transmission between the first UE and the second UE fails.

13. The method according to claim 12, wherein: When at least one of the following conditions is met, the first UE is triggered to send, to the second UE, signaling for requesting the second UE to send reference signal measurement: The first UE is preset and / or pre-configured with a periodic measurement window, The first UE obtains at least one measurement window, At least one measurement window of the first UE has started, or will start after at least t1 time units, or will start after at most t2 time units, a measurement value of the first UE for at least one second beam of the second UE is lower than a seventh threshold, and / or is lower than the seventh threshold for at least P1 times in a row, and / or is lower than the seventh threshold for at least P1 times within a specific time window, receiving a measurement value of at least one fifth beam of the first UE by the second UE, and the measurement value is lower than a seventh threshold, and / or is lower than the seventh threshold at least P1 times in succession, and / or is lower than the seventh threshold at least P1 times within a specific time window, and PSSCH transmission between the first UE and the second UE fails.

14. A method performed by a second user equipment UE in a wireless communication system, comprising: Sending at least one reference signal to the first UE; as well as receiving, from the first UE, first information related to at least one of: at least one preferred beam, and at least one set of time resources, The at least one time resource set is associated with at least one first beam.

15. The method according to claim 14, wherein: The at least one reference signal is sent on at least one second beam.

16. The method according to claim 14 or 15, wherein: The first information also includes at least one of the following: measurement information associated with at least one reference signal, second information indicating at least one third beam, wherein the at least one third beam is selected by the first UE from at least one second beam, the at least one third beam being at least one beam used for bypass transmission between the first UE and the second UE, and The at least one fourth beam includes at least one of the at least one preferred beam and the at least one third beam.

17. The method according to any one of claims 14 to 16, further comprising at least one of the following: Sending, to the first UE, signaling for requesting the first UE to send the first information; indicating, to the first UE, at least one resource location for the first UE to send the first information; and At least one sixth beam for bypass transmission with the first UE is determined based on the first information.

18. The method according to claim 14 or 17, wherein: When at least one of the following conditions is met, the second UE is triggered to send the at least one reference signal to the first UE, and / or receive the first information from the first UE, and / or send signaling for requesting the first UE to send the first information to the first UE, and / or indicate at least one resource location to the first UE for the first UE to send the first information, and / or determine at least one sixth beam for communicating with the first UE based on the first information: The second UE receives signaling from the first UE for requesting the second UE to send a reference signal measurement, The second UE indicates to the first UE a resource set for measurement and / or for sending the at least one reference signal, the second UE indicates to the first UE a resource set for measurement and / or for sending the at least one reference signal and sends the at least one reference signal on the resource set, The second UE is preset and / or pre-configured with periodic resources, The second UE acquires at least one resource, and the at least one resource can be used to send a reference signal for measurement by other UEs, or the at least one resource is preset or preconfigured or determined to be used to send a reference signal for measurement by other UEs, The second UE is preset and / or pre-configured with a periodic sending window, The first UE obtains at least one sending window, The second UE sends at least K reference signals on resources in a specific time or frequency range, The second UE obtains resources that can be used to send at least K reference signals, At least one transmission window of the first UE has started, or will start after at least t1 time units, or will start after at most t2 time units, At least one sending window of the second UE ends, a measurement value of at least one fifth beam of the first UE by the second UE is lower than a seventh threshold, and / or is lower than the seventh threshold for at least P1 times in succession, and / or is lower than the seventh threshold for at least P1 times within a specific time window, wherein the at least one fifth beam is at least one beam determined based on a result of the measurement, receiving a measurement value of at least one second beam of the second UE by the first UE, and the measurement value is lower than a seventh threshold, and / or is lower than the seventh threshold at least P1 times in succession, and / or is lower than the seventh threshold at least P1 times within a specific time window, and A physical bypass shared channel (PSSCH) transmission between the first UE and the second UE fails.

19. The method according to claim 17, wherein: Determining at least one sixth beam for communicating with the first UE based on the first information includes at least one of the following: determining the at least one sixth beam among the at least one preferred beam; determining the at least one sixth beam based on whether the measured value of the at least one reference signal exceeds a tenth threshold; Determine the at least one sixth beam based on whether there is a beam that has been selected by the second UE for communicating with other UEs, and / or a beam that has been indicated by the second UE as a preferred or selected beam to other UEs, among the beams indicated by the first information; Determine the at least one sixth beam according to whether the beam indicated by the first information has a corresponding sensing result; as well as Whether to use the beam as the at least one sixth beam is determined based on whether there are time resources available for the first UE to send a bypass signal or channel to the second UE in the time resource set corresponding to the beam indicated by the first information.

20. A user equipment UE, comprising: Transceiver; as well as A controller is coupled to the transceiver and configured to execute the method according to any one of claims 1-13 or 14-19.

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