WO2024208036A1 - Sidelink channel selection method, device, and storage medium - Google Patents

Abstract

The present application provides a sidelink channel selection method, a device, and a storage medium. The sidelink channel selection method is applied to a first terminal and comprises: determining a first beam, the first beam covering S PSFCHs with the highest priority in a first PSFCH set, S being a positive integer not greater than n, wherein the first PSFCH set comprises n PSFCHs to be sent by the first terminal, and n is a positive integer; determining a second PSFCH set, the second PSFCH set comprising m PSFCHs covered by the first beam in the first PSFCH set, and m being a positive integer greater than or equal to S and less than or equal to n; and selecting k PSFCHs with the highest priority in the second PSFCH set to form a third PSFCH set, k being a positive integer not greater than m, and a PSFCH in the third PSFCH set being a PSFCH to be sent by the first terminal.

Description

Side link channel selection method, device and storage medium Technical Field

The present application relates to the field of wireless communications, and in particular to a side link channel selection method, device and storage medium.

Background Art

In a sidelink communication system, when there is business to be transmitted between user equipment (UE), the business between UEs does not pass through the network side, that is, it does not pass through the forwarding of the cellular link between the UE and the base station, but is directly transmitted from the data source UE to the target UE through the sidelink. This mode of direct communication between UEs has characteristics that are significantly different from the communication mode of the traditional cellular system.

Typical applications of sidelink communication include device-to-device (D2D) communication and vehicle-to-everything (V2X) communication. Among them, V2X communication includes vehicle-to-vehicle (V2V), vehicle-to-pedestrian (V2P), and vehicle-to-infrastructure (V2I). For short-distance communication users who can apply Sidelink communication, Sidelink communication not only saves wireless spectrum resources, but also reduces the data transmission pressure of the core network, can reduce system resource usage, increase the spectrum efficiency of the cellular communication system, reduce communication latency, and save network operating costs to a large extent.

In a sidelink communication system, when a User Equipment (UE) includes multiple PSFCHs to be sent in a Physical Sidelink Feedback Channel (PSFCH) transmission opportunity, since the number of PSFCHs sent by a UE is limited, it is necessary to select some of the PSFCHs to be sent for transmission.

In current communication systems, only the PSFCH transmission capability of the UE is considered to select some of the PSFCHs to be transmitted. However, the number of UE transmission beams may also be limited. So when the number of UE transmission beams is limited, or both the number of UE transmission beams and the number of PSFCHs to be transmitted are limited, how to select the PSFCHs to be transmitted is a problem that needs to be solved urgently.

Summary of the invention

In view of this, embodiments of the present application hope to provide a side link channel selection method, device and storage medium.

In a first aspect, an embodiment of the present application provides a side link channel selection method, which is applied to a first terminal, including:

Determine a first beam, where the first beam covers S PSFCHs with the highest priority in a first PSFCH set, where S is a positive integer not greater than n, wherein the first PSFCH set includes n PSFCHs to be sent by the first terminal, where n is a positive integer;

Determine a second PSFCH set, where the second PSFCH set includes m PSFCHs in the first PSFCH set that are covered by the first beam, where m is a positive integer greater than or equal to S and less than or equal to n;

Select k PSFCHs with the highest priority from the second PSFCH set to form a third PSFCH set, where k is a positive integer not greater than m, and the PSFCHs in the third PSFCH set are the PSFCHs to be sent by the first terminal.

In a second aspect, an embodiment of the present application provides a side link channel selection device, including:

A beam determination module is configured to determine a first beam, where the first beam covers S PSFCHs with the highest priority in a first PSFCH set, where S is a positive integer not greater than n, wherein the first PSFCH set includes n PSFCHs to be sent by the first terminal, where n is a positive integer;

The channel determination module is configured to determine a second PSFCH set, wherein the second PSFCH set includes m PSFCHs in the first PSFCH set that are covered by the first beam, where m is a positive integer greater than or equal to S and less than or equal to n; k PSFCHs with the highest priority are selected from the second PSFCH set to form a third PSFCH set, where k is a positive integer not greater than m, and the PSFCHs in the third PSFCH set are the PSFCHs to be sent by the first terminal.

In a third aspect, an embodiment of the present application provides a side link channel selection device, including:

a memory configured to store a program;

The processor is configured to execute the program, and when the program is executed, the side link channel selection method as in the first aspect is performed.

In a fourth aspect, an embodiment of the present application provides a non-volatile storage medium, the storage medium includes a stored program, and when the program is run, the side link channel selection method of the first aspect is executed.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a flow chart of a side link channel selection method provided by an embodiment of the present application;

FIG2 is a schematic diagram of the beam angle range;

FIG3 is a schematic diagram of beam coverage;

FIG4 is a schematic diagram of beam and PSFCH mapping;

Figure 5 is a schematic diagram of wide beam coverage;

FIG6 is a flow chart of another side link channel selection method provided in an embodiment of the present application;

FIG7 is a schematic diagram of a process for updating a third beam;

FIG8 is a schematic diagram of another process of updating the third beam;

FIG9 is a schematic diagram of the structure of a side link channel selection device provided in an embodiment of the present application;

FIG10 is a schematic diagram of the structure of a side link channel selection device provided in an embodiment of the present application.

DETAILED DESCRIPTION

In order to make the application objectives, technical solutions and beneficial effects of the present application clearer, the embodiments of the present application are described below in conjunction with the accompanying drawings. It should be noted that, unless there is a conflict, the embodiments in the present application and the features in the embodiments can be combined with each other arbitrarily.

FIG1 is a flow chart of a side link channel selection method provided in an embodiment of the present application. As shown in FIG1 , the side link channel selection method provided in this embodiment includes:

Step S110, determine the first beam, the first beam covers the S highest priority PSFCHs in the first physical side link feedback channel PSFCH set, S is a positive integer not greater than n, wherein the first PSFCH set includes n PSFCHs to be sent by the first terminal, and n is a positive integer.

The side link channel selection method provided in this embodiment is used to select some of the PSFCHs as PSFCHs to be fed back when a terminal device (or user equipment (UE)) has multiple PSFCHs that need to be fed back. The side link channel selection method provided in this embodiment is executed by the first terminal in the network, and the first terminal can be any device that can communicate through a side link (Sidelink). When the first terminal has n PSFCHs to be sent, due to the limited capacity of the first terminal, or the limited capacity of the terminal receiving the PSFCH, or the interference of the transmission path, etc., the n PSFCHs to be sent by the first terminal cannot all be sent, so how to select the PSFCH to be sent to ensure the normal communication of the first terminal is a problem that needs to be solved.

Since the PSFCH needs to be carried on a beam for transmission, the determination of the PSFCH to be transmitted by the first terminal requires consideration of the situation where the number of PSFCHs transmitted by the first terminal is limited, and also the situation where the transmission beam of the first terminal is limited.

The first terminal has n PSFCHs to be sent, and the n PSFCHs to be sent are marked as a first PSFCH set, where n is a positive integer. That is, all PSFCHs to be sent by the first terminal are taken as the first PSFCH set, and the first PSFCH set includes at least one PSFCH to be sent by the first terminal.

The first terminal first determines the first beam, which covers the S highest priority PSFCHs in the first PSFCH set, where S is a positive integer not greater than n, that is, 1≤S≤n. The first beam is the beam to be sent by the first terminal, and the first beam can be one beam or a beam composed of multiple beams. The first beam determined to cover the S highest priority PSFCHs in the first PSFCH set is to enable the highest priority PSFCH to be sent.

Step S120: determine a second PSFCH set, where the second PSFCH set includes m PSFCHs in the first PSFCH set that are covered by the first beam, where m is a positive integer greater than or equal to S and less than or equal to n.

After determining the first beam to be sent, it is necessary to further determine the PSFCH to be sent corresponding to the first beam. The first terminal further determines the second PSFCH set in the first PSFCH set. The second PSFCH set includes m PSFCHs covered by the first beam in the first PSFCH set, where m is a positive integer greater than or equal to S and less than or equal to n, that is, S≤m≤n. In addition to covering the S highest priority PSFCHs, the first beam determined by the first terminal may also cover other PSFCHs to be sent in the first PSFCH set. Therefore, it is necessary to determine the PSFCH to be sent within the coverage of the first beam, that is, to determine the second PSFCH set.

Step S130: Select k PSFCHs with the highest priority in the second PSFCH set to form a third PSFCH set, where k is a positive integer not greater than m, and the PSFCHs in the third PSFCH set are PSFCHs to be sent by the first terminal.

After the first terminal determines the second PSFCH set, due to the limitation of the first terminal's capability, the m PSFCHs in the second PSFCH set may not all be sent. Therefore, the first terminal selects k PSFCHs with the highest priority in the second PSFCH set to form a third PSFCH set, where k is a positive integer not greater than m. The k PSFCHs in the final third PSFCH set are the determined PSFCHs to be sent.

There is a mapping relationship between each PSFCH in the third PSFCH set and a physical side link shared channel (PSSCH), and the mapping relationship includes the mapping of time-frequency resources.

In one embodiment, after selecting k PSFCHs with the highest priority in the second PSFCH set to form a third PSFCH set, the k PSFCHs in the third PSFCH set may be sent using the first beam.

The first beam and the third PSFCH set determined by this embodiment are the PSFCH to be sent and the beam used to send the PSFCH determined by the first terminal. Since the first beam covers the S PSFCHs with the highest priority among the PSFCHs to be sent by the first terminal, and the third PSFCH set is determined based on the coverage of the first beam and the priority of the PSFCH to be sent, a method for determining the PSFCH to be sent and the sending beam of the terminal is provided, and a PSFCH sending solution is provided when the beam for sending the PSFCH of the terminal is limited, or the number of beams and PSFCHs for sending the PSFCH is limited. The determined PSFCH to be sent fully considers the beam coverage and priority, and can effectively ensure the communication quality of the terminal.

In one embodiment, a beam may be a resource, for example, a transmitting end spatial filter, a receiving end spatial filter, a transmitting end precoding, a receiving end precoding, an antenna port, an antenna weight vector or an antenna weight matrix, etc. may all be used as a beam.

In one embodiment, the beam may be a transmission or receiving mode of transmission, including at least one of the following modes: spatial division multiplexing, frequency domain diversity, and time domain diversity. The transmission beam or transmission mode may be indicated by a reference signal resource index or a spatial relationship index.

A beam or a transmission mode or a reception mode of a transmission is determined according to a reference signal resource index, which means that the transmission or reception filter parameters of the transmission are the same as the transmission or reception filter parameters of the reference signal resource indicated by the reference signal resource index. The transmission includes one of the following: PSFCH transmission, PSSCH transmission, Physical Sidelink Control Channel (PSCCH) transmission, Sidelink Synchronization Signal and PBCH block (S-SSB) transmission, Physical Uplink Shared Channel (PUSCH) transmission, Physical Uplink Control Channel (PUCCH) transmission or Sounding Reference Signal (SRS) transmission.

The spatial relationship is essentially indicated by a reference signal, that is, the spatial relationship index can also be a reference signal index. The transmission beam or the sending mode or the receiving mode is determined according to the reference signal resource index, which means that the demodulation reference signal of the transmission has the same quasi-co-location parameters as the reference signal indicated by the reference signal resource index. The quasi-co-location parameters include at least one of the following: Doppler spread, Doppler shift, delay spread, average delay, average gain and spatial parameters. Spatial parameters include spatial reception parameters, such as angle of arrival, spatial correlation of the receiving beam, average delay and correlation of the time-frequency channel response (including phase information). The transmission includes one of the following: PSFCH transmission, PSSCH transmission, PSCCH transmission, S-SSB transmission, Physical Downlink Shared Channel (PDSCH) transmission, Physical Downlink Control Channel (PDCCH) transmission or Channel State Information-Reference Signal (CSI-RS) transmission. The reference signal includes at least one of the following: CSI-RS, Channel State Information Interference Measurement Signal (CSI-IM), Demodulation Reference Signal (DMRS), Downlink Demodulation Reference Signal (DL DMRS), PSCCH DMRS, PSSCH DMRS, Sidelink CSI-RS, Uplink Demodulation Reference Signal (UL DMRS), SRS, Phase Tracking Reference Signals (PTRS), Random Access Channel (RACH), Synchronization Signal (SS), Synchronization Signal Block (SSB), S-SSB, Primary Synchronization Signal (PSS) or Secondary Synchronization Signal (SSS), Side Link PSS, Side Link SSS, Physical Sidelink Broadcast Channel (PSBCH) DMRS.

In one embodiment, beam and beam state are the same concept, and the beam state includes at least one of the following: quasi co-location (QCL) state, transmission configuration indicator (TCI) state, spatial relationship information, reference signal information, spatial filter information, and precoding information.

In one embodiment, the first terminal includes L second beams, the L second beams constitute a first beam set, and L is a positive integer greater than or equal to 1. Each PSFCH in the first PSFCH set corresponds to a second beam in the first beam set. Each second beam in the first beam set corresponds to at least one PSFCH to be sent in at least one first PSFCH set. That is, the second beam in the first beam set does not correspond one-to-one to the PSFCH in the first PSFCH set, but each PSFCH corresponds to a second beam.

In one embodiment, the first terminal selects S PSFCHs with the highest priority from n PSFCHs to be sent. Here, the S PSFCHs with the highest priority selected by the first terminal correspond to one second beam among L second beams, and the second beam is marked as the fourth beam. When S=1, a second beam corresponding to the S PSFCHs with the highest priority is marked as the fourth beam. When S＞1, among the S PSFCHs with the highest priority, although each PSFCH corresponds to a second beam, the second beams corresponding to these PSFCHs are the same. For example, the second beams corresponding to the S PSFCHs with the highest priority are all beam 1. At this time, beam 1, which is the second beam, is marked as the fourth beam.

In one embodiment, when determining the first beam, the first beam covers S PSFCHs with the highest priority in the first PSFCH set, which means that the first beam covers the fourth beam.

In one embodiment, one beam overlays another beam, including at least one of the following:

There is overlap between one beam and another;

The angular range of one beam includes the angular range of another beam. In other words, the angular range of the other beam is a subset of the angular range of the one beam;

The directions corresponding to the maximum gains of one beam and the other beam are the same;

The angular extent of one beam is the same as that of the other beam.

In one embodiment, one beam covers multiple beams, including at least one of the following:

There is overlap between one beam and each of the multiple beams;

The angular range of any beam among the multiple beams is a subset of the angular range of the one beam;

A beam consists of multiple beams.

In one embodiment, one beam covers one PSFCH, which means that one beam covers the beam corresponding to the PSFCH.

In one embodiment, the angular range of a beam is reduced by X dB relative to the maximum beam gain. The direction in which the maximum beam gain is reduced by X dB relative to the maximum beam gain is used to determine the boundary of the angle range corresponding to a beam direction. As shown in Figure 2, Figure 2 is a schematic diagram of the beam angle range. In Figure 2, point A corresponds to the maximum gain of a beam, and the OA direction is marked as the beam pointing direction of the beam, that is, the direction corresponding to the maximum gain of the beam. The beam gain of point B is reduced by X dB relative to the maximum gain of the beam. The beam gain of point C is reduced by X dB relative to the maximum gain of the beam. Thus, the OB direction and the OC direction are determined as the two boundaries of the angle range of the beam, and the angle range of the beam is determined as the angle BOC. The above-mentioned maximum beam gain can also be called the maximum antenna gain. In a non-omnidirectional antenna, that is, a non-omnidirectional beam (that is, a directional beam), the antenna gains in different directions are often different. For the above-mentioned value of X, in a special case, X=3dB.

FIG3 is a schematic diagram of beam coverage. As shown in FIG3, the first beam covers the fourth beam, including: the angle range of the fourth beam is a subset of the angle range of the first beam. In FIG3, the first terminal includes n=4 PSFCHs to be sent, namely PSFCH1, PSFCH2, PSFCH3, and PSFCH4, each of which corresponds to a second beam. PSFCH1 corresponds to the second beam as beam 1, PSFCH2 corresponds to the second beam as beam 1, PSFCH3 corresponds to the second beam as beam 2, and PSFCH4 corresponds to the second beam as beam 2. The priority values p corresponding to PSFCH1, PSFCH2, PSFCH3, and PSFCH4 to be sent are 1, 1, 3, and 4, respectively. The smaller the priority value p, the higher the priority. The first terminal selects S PSFCHs with the highest priority from the n=4 PSFCHs to be sent, including PSFCH1 and PSFCH2. PSFCH1 and PSFCH2 correspond to the same second beam, namely beam 1, which can be marked as the fourth beam. In Figure 3, the angle range of beam 1 is BOC, the angle range of beam 2 is DOE, and the angle range of beam 3 is AOF. The beam corresponding to PSFCH1 and PSFCH2 is the fourth beam (beam 1), with an angle range of BOC. The first beam determined by the first terminal is beam 3, with an angle range of AOF. In Figure 3, the angle range of the fourth beam is a subset of the angle range of the first beam. The angle range of a beam is determined by reducing the relative maximum beam gain by XdB. Points A, B, C, D, E, and F are reduced by XdB relative to the maximum beam gain of their respective beams.

FIG4 is a schematic diagram of beam and PSFCH mapping. As shown in FIG4, the first terminal includes L=4 second beams, which are beams 1 to 4. Also, the first terminal includes n=6 PSFCHs to be sent, which are PSFCH1 to PSFCH6, and the priority values p of PSFCH1 to PSFCH6 are p=1, p=3, p=1, p=1, p=2, and p=4, respectively. The first PSFCH set includes PSFCH1 to PSFCH6. The larger the priority value p, the lower the corresponding priority, and vice versa. In FIG4, each PSFCH in PSFCH1 to PSFCH6 corresponds to one of the L=4 second beams. Beam 1 as the second beam corresponds to PSFCH1 and PSFCH5, beam 2 as the second beam corresponds to PSFCH2, beam 3 as the second beam corresponds to PSFCH3 and PSFCH4, and beam 4 as the second beam corresponds to PSFCH6.

In one embodiment, among the L second beams, the second beams corresponding to the S highest priority PSFCHs among the n PSFCHs to be transmitted are marked as the fourth beam. In FIG4 , the two highest priority PSFCH3 and PSFCH4 among PSFCH1 to PSFCH6 respectively correspond to beam 3. Beam 3 is determined as the fourth beam.

The first beam determined by the first terminal may be a wide beam with a larger coverage range, or may be a beam set consisting of multiple narrow beams with smaller coverage ranges. When the first beam is a wide beam with a larger coverage range, the first beam covers one or more second beams in the first beam set of the first terminal. When the first beam is a narrow beam with a smaller coverage range, the first beam includes one or more second beams in the first beam set of the first terminal.

In the case where the first beam is a wide beam, the first beam covers the S highest priority PSFCHs, which means that the first beam covers the fourth beam corresponding to these S PSFCHs. Among them, the second beam corresponding to the S PSFCHs is marked as the fourth beam, and the fourth beam may include one second beam or multiple second beams. Figure 5 is a schematic diagram of wide beam coverage. As shown in Figure 5, the second beams corresponding to the S PSFCHs are the same, all of which are beam 3 in Figure 5, and the S PSFCHs include PSFCH3 and PSFCH4. In addition to covering the fourth beam, the first beam can also cover other second beams. In Figure 5, the first beam not only covers the fourth beam, but also covers the fourth second beam (beam 4).

All PSFCHs covered by the first beam are marked as the second PSFCH set. The PSFCHs covered by the first beam include the PSFCHs corresponding to the beams covered by the first beam. In FIG5 , the beams covered by the first beam include the fourth beam (beam 3) and the fourth second beam (beam 4), wherein the PSFCHs having a mapping relationship with the fourth beam include PSFCH3 and PSFCH4, and the PSFCHs having a mapping relationship with the fourth second beam include PSFCH6. Therefore, in FIG5 , the PSFCHs corresponding to the beams covered by the first beam include PSFCH3, PSFCH4, and PSFCH6, that is, the second PSFCH set includes PSFCH3, PSFCH4, and PSFCH6.

In one embodiment, the first terminal selects PSFCH from the second PSFCH set according to priority. In other words, the first terminal selects PSFCH from the PSFCH covered by the first beam according to priority. In Figure 5, the second PSFCH set includes PSFCH3, PSFCH4, and PSFCH6, and their corresponding priority values p are p=1, p=1, and p=4, respectively. The first terminal selects PSFCH from the second PSFCH set in order from high to low priority. In other words, the PSFCH is selected in order from low to high priority value p. In one special case, the PSFCH selected by the first terminal in the second PSFCH set includes PSFCH3 and PSFCH4. In another special case, the PSFCH selected by the first terminal in the second PSFCH set includes PSFCH3, PSFCH4, and PSFCH6.

FIG6 is a flow chart of another side link channel selection method provided in an embodiment of the present application. As shown in FIG6 , the side link channel selection method provided in this embodiment includes:

Step S610: determine a third beam, wherein the initial third beam is a second beam corresponding to at least one PSFCH with the highest priority in the first PSFCH set.

The side link channel selection method provided in this embodiment is a specific process for determining the first beam. A beam may be updated in a beam cycle manner. The process of determining the third beam may include: determining an initial third beam, updating the third beam, and determining a final updated third beam. Alternatively, the process of determining the third beam may include: determining an initial third beam, determining a pre-updated third beam, updating the third beam, and determining a final updated third beam.

First, an initial third beam needs to be determined, where the initial third beam is the second beam corresponding to at least one PSFCH with the highest priority in the first PSFCH set.

Step S620, updating the third beam, wherein the number of updating operations is zero or at least one, wherein the coverage of the updated third beam is not less than the coverage of the initial third beam.

After the initial third beam is determined, the third beam needs to be updated. The number of operations for updating the third beam can be zero or at least sequential. That is, the third beam can have no update operation, and the initial third beam is the last updated third beam, that is, the first beam. When the third beam is updated at least once, the principle of updating the third beam can be: the coverage of the updated third beam is not less than the coverage of the initial third beam. The update of the third beam can include a pre-update process, that is, first determining the pre-updated third beam, and when it is determined that the pre-updated third beam meets the preset conditions, the pre-updated third beam is determined as the updated third beam.

In one embodiment, updating the third beam includes: determining an updated third beam based on the second beam having the smallest angle with the third beam; or determining a pre-updated third beam based on the second beam having the smallest angle with the third beam, and determining whether the pre-updated third beam is the updated third beam. In one embodiment, the angle between one beam and another beam is the minimum value of two angles respectively corresponding to two edge beams and another beam among a plurality of beams covered by one beam.

In one embodiment, the condition for updating the third beam includes at least one of the following: the first power is greater than or equal to the first threshold value, and the first power is a power corresponding to the third beam before updating; and the second beam set is a non-empty set.

In one embodiment, the conditions for determining the pre-updated third beam include at least one of the following: the first power is greater than or equal to the first threshold value, and the first power is a power corresponding to the third beam before updating; the second beam set is a non-empty set.

Among them, the first power is the difference between the third power and the first path loss, the first path loss is the path loss between the first terminal and the second terminal related to the third beam before the update, and the third power is a power value related to the third beam before the update determined by the first terminal.

In the process of determining the transmit power of the third beam before updating, the first terminal determines multiple powers, and the multiple powers are used to determine the transmit power of the third beam before updating. The third power is one power value among the multiple powers.

The path loss between the first terminal and the second terminal can be understood as the path loss between the signal transmitted by the first terminal and the The loss of the second terminal, the path loss is the difference between the transmit power of the first terminal and the receive power of the second terminal. The difference here is the difference in the logarithmic domain, that is, the transmit power of the first terminal and the receive power of the second terminal are both in dBm. The beams used by the first terminal to transmit information are different, and the path losses between the first terminal and the second terminal are different. The first path loss is the corresponding path loss when the first terminal is assumed to use the third beam before the update. The first path loss here can be measured or calculated by the first terminal, or the second terminal can feed back the first path loss to the first terminal.

The first terminal continuously adds the second beam not covered by the third beam before updating to the third beam before updating. If the second beam set is an empty set, the second beam not covered by the third beam before updating cannot be added to the third beam before updating.

In one embodiment, the condition for determining whether the pre-updated third beam is the updated third beam includes: the second power is not less than the second threshold value, and the second power is a power corresponding to the pre-updated third beam. The second power is the difference between the fourth power and the second path loss, the second path loss is the path loss between the first terminal and the second terminal related to the pre-updated third beam, and the fourth power is a power value related to the third beam before the update determined by the first terminal. The determination of the fourth power is similar to the determination of the third power, and the determination of the second path loss is similar to the determination of the first path loss, which will not be repeated here.

Step S630: determine the third beam that is updated most recently as the first beam.

When the third beam is updated in step S620 and it is determined that the updated third beam does not meet the update condition, the third beam that is most recently updated is determined as the first beam.

The process of updating the third beam can be performed in two ways, as shown in FIG. 7, which is a schematic diagram of a process of updating the third beam. As shown in FIG. 7, first, the initial third beam is determined in step S710, then the pre-updated third beam is determined in step S720, and finally the updated third beam is determined in step S730. In one embodiment, since the condition for updating the third beam is not met, only step S710 is performed. In another embodiment, step S710 is performed once, and steps S720 and S730 are performed once each, or steps S720 and S730 are repeated multiple times. In one embodiment, step S710 is performed once. Steps S720 and S730 are performed 0 times, or steps S720 and S730 are performed once, or steps S720 and S730 are repeated multiple times. And, after the above 0/1/multiple executions of steps S720 and S730, step S720 is performed again. In a special case, after executing step S720, it is found that the condition for updating the third beam is not met, so step S730 is no longer executed.

As shown in FIG8 , FIG8 is another schematic diagram of a process for updating the third beam. As shown in FIG8 , first, the initial third beam is determined in step S810, and then the updated third beam is determined in step S820. In one embodiment, only step S810 is performed. In another embodiment, step S810 is performed once, and step S820 is performed once or repeatedly performed multiple times. For determining the updated third beam, the updated third beam can be directly determined. Alternatively, the pre-updated third beam can be determined first, and when the pre-updated third beam is If the given conditions are met, the pre-updated third beam is further determined as the updated third beam.

In one embodiment, the first terminal determines the initial third beam, including using the second beams corresponding to the S PSFCHs with the highest priority among the n PSFCHs as the initial third beam. In FIG4 , the S PSFCHs with the highest priority include PSFCH3 and PSFCH4, the S PSFCHs with the highest priority correspond to the third second beam (beam 3), and the initial third beam is determined as the third second beam.

In one embodiment, the first terminal determines the third beam, including using the second beam corresponding to the S PSFCHs with the highest priority among the n PSFCHs as the third beam. In FIG4 , the S PSFCHs with the highest priority include PSFCH3 and PSFCH4, and the S PSFCHs with the highest priority correspond to the third second beam, and the third beam is determined as the third second beam. After the first terminal determines the initial third beam, the determined initial third beam is used as the first beam. Alternatively, after the first terminal determines the initial third beam, the third beam is subsequently updated, and the last updated third beam is used as the first beam.

In one embodiment, the second beam set is the beam corresponding to the PSFCH not covered by the third beam before updating among the n PSFCHs to be transmitted. In other words, the second beam set is the second beam not covered by the third beam before updating among the L second beams.

As shown in FIG. 4, a special example, the first terminal determines that the initial third beam is the third second beam, that is, beam 3. The pre-updated third beam determined by the first terminal for the first time includes the third beam, and a second beam with the smallest angle with the third beam among the second beams not covered by the third beam, and the second beam is the fourth second beam. At this time, the pre-updated third beam includes the third second beam and the fourth second beam. In a special example, the pre-updated third beam is composed of the third second beam and the fourth second beam. The first terminal determines whether the pre-updated third beam meets the preset conditions. If the preset conditions are met, the pre-updated third beam is determined to be the updated third beam. The first terminal can repeat the above process, continuously determine the pre-updated third beam, and continuously determine the pre-updated third beam as the updated third beam.

The above-mentioned method of determining the updating of the updated third beam according to the angle between the third beam before updating and the second beam is a specific scheme for determining the first beam when the first beam is a wide beam.

When the first beam is a narrow beam, the third beam is updated, including: adding the second beam corresponding to the PSFCH with the highest priority in the fourth PSFCH set to the third beam before the update, wherein the fourth PSFCH set includes the PSFCH in the first PSFCH set that is not covered by the third beam before the update, and the third beam is a beam set including one or more second beams.

The first beam is composed of the following two: at least one second beam among the L second beams that is not covered by the fourth beam, and the fourth beam. In a special case, as shown in FIG4 , the first beam is composed of the fourth beam and the fourth beam. The second beam is composed, that is, the first beam is composed of beam 3 and beam 4 in Figure 4. The process of determining the third beam may include: determining the third beam, updating the third beam, and determining the final updated third beam.

The following describes in detail the case where the first beam is a set of narrow beams:

In one embodiment, the first terminal determines the third beam, including performing zero or at least one beam update operation on the third beam. The third beam is a beam set, including one or more second beams. The third beam that is updated last is marked as the first beam, and the first beam includes one or more second beams.

In one embodiment, the first terminal updates the third beam, including: the first terminal adds a second beam to the third beam before the update, and the added second beam belongs to the first beam set. The first terminal performs the third beam update process once or multiple times. The second beam in the first beam set that is not covered by the third beam before the update is marked as the second beam set.

In one embodiment, after removing the second beam included in the third beam before updating from the first beam set, the remaining beams are marked as target remaining beams. Among the n PSFCHs to be transmitted, several PSFCHs corresponding to the target remaining beams are marked as a fourth PSFCH set. Alternatively, among the n PSFCHs to be transmitted, the PSFCHs not covered by the third beam before updating are marked as a fourth PSFCH set.

In one embodiment, updating the third beam by the first terminal includes: adding the second beam corresponding to the PSFCH with the highest priority in the fourth PSFCH set to the third beam before the update.

In one embodiment, the initial third beam is an empty set, and at this time, the PSFCHs not covered by the third beam include PSFCH1 to PSFCH6 in Figure 4. That is, the fourth PSFCH set includes PSFCH1 to PSFCH6 in the figure.

The first terminal updates the third beam and adds the second beam corresponding to the PSFCH with the highest priority in the fourth PSFCH set to the third beam before the update, so that the third second beam in Figure 4 is added to the third beam before the update, so that the updated third beam includes the third second beam, and the updated fourth PSFCH set includes PSFCH1, PSFCH2, PSFCH5, and PSFCH6.

The first terminal updates the third beam for the second time. The first terminal adds the second beam corresponding to the PSFCH with the highest priority in the fourth PSFCH set to the third beam before the update, thereby adding the first second beam to the third beam before the update. The updated third beam includes the third second beam included in the third beam before the update, and the first second beam added this time. The updated fourth PSFCH set includes PSFCH2 and PSFCH6.

The subsequent process of adding the second beam to the third beam before updating is similar to the above and will not be repeated here.

FIG9 is a schematic diagram of the structure of a side link channel selection device provided in an embodiment of the present application. As shown in FIG9 , the side link channel selection device provided in this embodiment includes:

The beam determination module 91 is configured to determine a first beam, which covers S PSFCHs with the highest priority in the first PSFCH set, where S is a positive integer not greater than n, and the first PSFCH set includes n PSFCHs to be sent by the first terminal, where n is a positive integer; the channel determination module 92 is configured to determine a second PSFCH set, which includes m PSFCHs in the first PSFCH set covered by the first beam, where m is a positive integer greater than or equal to S and less than or equal to n; and k PSFCHs with the highest priority are selected from the second PSFCH set to form a third PSFCH set, where k is a positive integer not greater than m, and the PSFCHs in the third PSFCH set are the PSFCHs to be sent by the first terminal.

The side link channel selection device provided in this embodiment is arranged in the first terminal, and is used to execute the side link channel selection method of the embodiment shown in FIG. 1 . Its implementation principle and technical effect are similar and will not be described in detail here.

Figure 10 is a structural schematic diagram of a side link channel selection device provided in an embodiment of the present application. As shown in Figure 10, the side link channel selection device includes a processor 101, a memory 102, a receiver 103 and a transmitter 104; the number of processors 101 in the side link channel selection device can be one or more, and Figure 10 takes one processor 101 as an example; the processor 101, memory 102, receiver 103 and transmitter 104 in the side link channel selection device can be connected via a bus or other means, and Figure 10 takes connection via a bus as an example.

The memory 102, as a computer-readable storage medium, can be used to store software programs, computer executable programs and modules, such as the program instructions/modules (beam determination module 91, channel determination module 92) corresponding to the side link channel selection method in the embodiment of FIG. 1 of the present application. The processor 101 runs the software programs, instructions and modules stored in the memory 102, thereby applying various functions and data processing of the side link channel selection device, that is, implementing the above-mentioned side link channel selection method.

The memory 102 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system and an application required for at least one function; the data storage area may store data created according to the use of the edge link channel selection device, etc. In addition, the memory 102 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage devices.

The receiver 103 is any device/module having data receiving capability or a combination of multiple devices/modules having data receiving capability, and the transmitter 104 is any device/module having data sending capability or a combination of multiple devices/modules having data sending capability.

An embodiment of the present application also provides a storage medium containing computer executable instructions, which are used to execute a side link channel selection method when executed by a computer processor. The method includes: determining a first beam, where the first beam covers S highest priority PSFCHs in a first PSFCH set, where S is a positive integer not greater than n, wherein the first PSFCH set includes n PSFCHs to be sent by a first terminal, and n is a positive integer; determining a second PSFCH set, where the second PSFCH set includes m PSFCHs in the first PSFCH set covered by the first beam, where m is a positive integer greater than or equal to S and less than or equal to n. Integer; k PSFCHs with the highest priority are selected from the second PSFCH set to form a third PSFCH set, where k is a positive integer not greater than m, and the PSFCHs in the third PSFCH set are the PSFCHs to be sent by the first terminal.

Although the implementation methods disclosed in this application are as above, the contents are only implementation methods adopted for facilitating understanding of the technical solutions of this application, and are not used to limit this application. Any technician in the technical field to which this application belongs can make any modifications and changes in the form and details of implementation without departing from the core technical solutions disclosed in this application, but the scope of protection defined in this application shall still be subject to the scope defined in the attached claims.

Claims (15)

A side link channel selection method, applied to a first terminal, comprising: Determine a first beam, where the first beam covers S PSFCHs with the highest priority in a first physical side link feedback channel PSFCH set, where S is a positive integer not greater than n, wherein the first PSFCH set includes n PSFCHs to be sent by the first terminal, where n is a positive integer; Determine a second PSFCH set, where the second PSFCH set includes m PSFCHs in the first PSFCH set that are covered by the first beam, where m is a positive integer greater than or equal to S and less than or equal to n; Select k PSFCHs with the highest priority from the second PSFCH set to form a third PSFCH set, where k is a positive integer not greater than m, and the PSFCHs in the third PSFCH set are the PSFCHs to be sent by the first terminal. The method according to claim 1, after selecting k PSFCHs with the highest priority from the second PSFCH set to form a third PSFCH set, further comprising: The k PSFCHs in the third PSFCH set are transmitted using the first beam. The method according to claim 1, wherein each PSFCH in the first PSFCH set corresponds to a second beam in a first beam set, and the first beam set includes L second beams of the first terminal, where L is a positive integer greater than or equal to 1. The method according to claim 3, wherein determining the first beam comprises: Determine a third beam, wherein the initial third beam is a second beam corresponding to at least one PSFCH with the highest priority in the first PSFCH set; updating the third beam, wherein the number of updating operations is zero or at least one, wherein the coverage of the updated third beam is not less than the coverage of the initial third beam; The third beam that is updated most recently is determined as the first beam. The method according to claim 4, wherein updating the third beam comprises: Determine an updated third beam based on the second beam having the smallest angle with the third beam; Alternatively, based on the second beam having the smallest angle with the third beam, a pre-updated third beam is determined, and it is determined whether the pre-updated third beam is the updated third beam. The method according to claim 5, wherein The updated third beam covers the third beam before updating, and covers a second beam in the second beam set that has the smallest angle with the third beam before updating; Alternatively, the pre-updated third beam covers the third beam before the update, and covers the second beam a second beam in the set whose angle with the third beam before updating is the smallest; The second beam set includes the second beams in the first beam set that are not covered by the third beam before the update. The method according to claim 6, wherein the condition for updating the third beam comprises at least one of the following: The first power is greater than or equal to a first threshold value, and the first power is a power corresponding to the third beam before the update; The second beam set is a non-empty set. The method according to claim 6, wherein the condition for determining the pre-updated third beam comprises at least one of the following: The first power is greater than or equal to a first threshold value, and the first power is a power corresponding to the third beam before the update; The second beam set is a non-empty set. The method according to claim 7 or 8, wherein the first power is the difference between the third power and the first path loss, the first path loss is the path loss between the first terminal and the second terminal related to the third beam before the update, and the third power is a power value related to the third beam before the update determined by the first terminal. The method according to claim 6, wherein the condition for determining whether the pre-updated third beam is the updated third beam comprises: The second power is not less than a second threshold value, and the second power is a power corresponding to the pre-updated third beam. The method according to claim 10, wherein the second power is the difference between the fourth power and the second path loss, the second path loss is the path loss between the first terminal and the second terminal related to the pre-updated third beam, and the fourth power is a power value determined by the first terminal and related to the third beam before the update. The method according to claim 4, wherein updating the third beam comprises: Add the second beam corresponding to the PSFCH with the highest priority in the fourth PSFCH set to the third beam before updating, wherein the fourth PSFCH set includes the PSFCH in the first PSFCH set that is not covered by the third beam before updating, and the third beam is a beam set including at least one second beam. A side link channel selection device, comprising: A beam determination module is configured to determine a first beam, where the first beam covers S PSFCHs with the highest priority in a first physical side link feedback channel PSFCH set, where S is a positive integer not greater than n, wherein the first PSFCH set includes n PSFCHs to be sent by the first terminal, where n is a positive integer; The channel determination module is configured to determine a second PSFCH set, wherein the second PSFCH set includes m PSFCHs in the first PSFCH set that are covered by the first beam, where m is a positive integer greater than or equal to S and less than or equal to n; k PSFCHs with the highest priority are selected from the second PSFCH set to form a third PSFCH set, where k is a positive integer not greater than m, and the PSFCHs in the third PSFCH set are the PSFCHs to be sent by the first terminal. A side link channel selection device, comprising: a memory configured to store a program; The processor is configured to execute the program, and when the program is executed, the side link channel selection method as described in any one of claims 1 to 12 is performed. A non-volatile storage medium, the storage medium comprising a stored program, wherein the program, when running, executes the side link channel selection method described in any one of claims 1 to 12.