CN113286325B

CN113286325B - SL BSR processing method, terminal and network equipment

Info

Publication number: CN113286325B
Application number: CN202010102909.3A
Authority: CN
Inventors: 鲍炜; 杨晓东
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2020-02-19
Filing date: 2020-02-19
Publication date: 2022-04-19
Anticipated expiration: 2040-02-19
Also published as: CN113286325A

Abstract

The invention provides a SL BSR processing method, a terminal and network equipment, wherein the method comprises the following steps: triggering a first SL BSR under the condition that a timer for retransmitting the BSR is overtime and the SL cache contains data to be sent; determining Scheduling Request (SR) configuration of a first SL BSR according to a logic channel triggering a second SL BSR; wherein the retransmission BSR timer is triggered to start or restart under the condition of sending the second SL BSR. The embodiment of the invention can improve the transmission efficiency of the SL BSR.

Description

SL BSR processing method, terminal and network equipment

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a SL BSR processing method, a terminal, and a network device.

Background

With the development of communication technology, Sidelink (SL) may be supported in a communication system for direct data transmission between terminals (UEs) without passing through a network device. For sidelink transmissions, resources may be controlled by the network equipment and allocated for each terminal. Currently, a Buffer Status Report (BSR) triggering rule and a Scheduling Request (SR) configuration rule are defined, where the BSR triggering rule includes:

rule 1, BSR is triggered by logical channels;

rule 2, when the retransmission BSR timer expires, there is still a data-triggered BSR (which may also be referred to as a retransmission SL BSR) in the SL buffer.

For SR configuration rules include: and determining the SR configuration according to the highest priority in the corresponding priorities of the logical channels included by the BSR.

The transmission efficiency of the SL BSR is low due to the low priority of the logical channel corresponding to the retransmitted SL BSR.

Disclosure of Invention

Embodiments of the present invention provide a method, a terminal, and a network device for processing a SL BSR, so as to solve the problem of low transmission efficiency of the SL BSR.

In a first aspect, an embodiment of the present invention provides a method for processing a SL BSR, where the method is applied to a terminal, and the method includes:

triggering a first SL BSR under the condition that a timer for retransmitting the BSR is overtime and the SL cache contains data to be sent;

determining Scheduling Request (SR) configuration of a first SL BSR according to a logic channel triggering a second SL BSR;

wherein, under the condition of sending the second SL BSR, triggering and starting or restarting the retransmission BSR timer.

In a second aspect, an embodiment of the present invention provides a SL BSR processing method, applied to a network device, including:

a receiving terminal configures a transmitted SR based on a scheduling request SR of a first SL BSR;

the SR is configured to determine according to a logical channel triggering a second SL BSR, the first SL BSR is a triggered SL BSR when a timer for retransmitting BSRs is overtime and the SL cache contains data to be sent; and under the condition of sending the second SL BSR, triggering and starting or restarting the retransmission BSR timer.

In a third aspect, an embodiment of the present invention provides a terminal, including:

the triggering module is used for triggering the first SL BSR under the condition that the timer of the retransmission buffer state report BSR is overtime and the side link SL buffer contains data to be sent;

a determining module, configured to determine, according to a logical channel triggering a second SL BSR, a scheduling request SR configuration of the first SL BSR;

In a fourth aspect, an embodiment of the present invention provides a network device, including:

the terminal comprises a receiving module, a sending module and a receiving module, wherein the receiving module is used for receiving the SR sent by the terminal based on the scheduling request SR configuration of the first SL BSR;

In a fifth aspect, an embodiment of the present invention provides a terminal, including: a memory, a processor and a program stored on the memory and executable on the processor, the program implementing the steps in the above SL BSR processing method when executed by the processor.

In a sixth aspect, an embodiment of the present invention provides a network device, including: a memory, a processor and a program stored on the memory and executable on the processor, the program implementing the steps in the above SL BSR processing method when executed by the processor.

In a seventh aspect, an embodiment of the present invention provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements the steps of the SL BSR processing method described above.

In the embodiment of the invention, under the condition that the timer for retransmitting the BSR is overtime and the SL cache contains data to be sent, the first SL BSR is triggered; determining Scheduling Request (SR) configuration of a first SL BSR according to a logic channel triggering a second SL BSR; wherein the retransmission BSR timer is triggered to start or restart under the condition of sending the second SL BSR. In general, since the priority of the logical channel triggering the second SL BSR is greater than the priority corresponding to the logical channel with the highest priority in the first SL BSR, in the embodiment of the present invention, the SR configuration of the first SL BSR may be improved, so as to improve the transmission efficiency of the SL BSRs.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1 is a block diagram of a network system to which an embodiment of the present invention is applicable;

fig. 2 is a flowchart of a method for processing a SL BSR according to an embodiment of the present invention;

fig. 3 is a flowchart of another SL BSR processing method according to an embodiment of the present invention;

fig. 4 is a structural diagram of a terminal according to an embodiment of the present invention;

fig. 5 is a block diagram of a network device according to an embodiment of the present invention;

fig. 6 is a block diagram of another terminal provided in an embodiment of the present invention;

fig. 7 is a block diagram of another network device according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The terms "comprises," "comprising," or any other variation thereof, in the description and claims of this application, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. Furthermore, the use of "and/or" in the specification and claims means that at least one of the connected objects, such as a and/or B, means that three cases, a alone, B alone, and both a and B, exist.

In the embodiments of the present invention, words such as "exemplary" or "for example" are used to mean serving as examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "e.g.," an embodiment of the present invention is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.

Embodiments of the present invention are described below with reference to the accompanying drawings. The SL BSR processing method, the terminal and the network equipment provided by the embodiment of the invention can be applied to a wireless communication system. The wireless communication system may be a 5G system, or an Evolved Long Term Evolution (lte) system, or a subsequent Evolved communication system.

Referring to fig. 1, fig. 1 is a structural diagram of a network system to which an embodiment of the present invention is applicable, and as shown in fig. 1, the network system includes a first terminal 11, a second terminal 12 and a network device 13, where the first terminal 11 and the second terminal 12 may be user terminals or other terminal-side devices, for example: it should be noted that, in the embodiment of the present invention, specific types of the first terminal 11 and the second terminal 12 are not limited, and the examples of the terminal side Device include a Mobile phone, a Tablet Personal Computer (Tablet Personal Computer), a Laptop Computer (Laptop Computer), a Personal Digital Assistant (PDA), a Mobile Internet Device (MID), or a Wearable Device (Wearable Device). The network device may be a 5G base station, a later-version base station, a base station in another communication system, referred to as a node B, an evolved node B, or a Transmission Reception Point (TRP), an Access Point (AP), or another vocabulary in the field, and the network device is not limited to a specific technical vocabulary as long as the same technical effect is achieved. In addition, the network device may be a Master Node (MN) or a Secondary Node (SN). It should be noted that, in the embodiment of the present invention, only the 5G base station is taken as an example, but the specific type of the network device is not limited.

Optionally, in fig. 1, for the sidelink transmission from the first terminal 11 to the second terminal 12, the first terminal 11 is a transmitting end of the sidelink transmission, and the second terminal 12 is a receiving end of the sidelink transmission. Of course, in other sidelink transmissions, the first terminal 11 may also serve as a receiving end for other sidelink transmissions.

Referring to fig. 2, fig. 2 is a flowchart of an SL BSR processing method according to an embodiment of the present invention, where the method is applied to a terminal, and as shown in fig. 2, the method includes the following steps:

step 201, when the retransmission BSR timer exceeds (retxsbsr _ timer) and the SL buffer contains data to be sent, triggering a first SL BSR;

step 202, determining a scheduling request SR configuration of a first SL BSR according to a logical channel triggering a second SL BSR;

In the embodiment of the present invention, the terminal may be understood as a transmitting end of SL transmission, where the transmitting end may transmit data to one or more destination addresses (destination IDs), one destination ID corresponds to one link (link), and each link is configured and reported separately.

Optionally, one destination ID or link may generally configure a plurality of logical channel groups LCGs (logical channel groups), for example, 8 LCGs. Each LCG may include a certain number of logical channels, because the maximum number of logical channels is 32, the logical channels are divided into 8 groups, the logical channels with similar transmission requirements are grouped into one LCG, and one LCG reports one Buffer Size (BS), thereby improving reporting efficiency and reducing reporting overhead.

The first SL BSR described above may be understood as a retransmitted SL BSR. The second SL BSR may be understood as a conventionally triggered SL BSR, which may also be referred to as a high priority data arrival triggered SL BSR. Conventional triggers (high priority data arrival triggers) include the following two cases:

in case 1, when data of a logical channel under a certain target address is waiting for a Medium Access Control (MAC) layer to be sent newly, the priority of the logical channel is higher than the highest priority of the logical channels with data to be sent currently under the same target address.

Case 2, the target address has not previously had any logical channel to send data.

Both of the above cases trigger a normal SL BSR, and the logical channel with new data arriving is referred to as the logical channel triggering the SL BSR.

The triggering and starting or restarting of the BSR timer when the second SL BSR is sent may be understood as that the BSR timer is associated with the second SL BSR. Specifically, after the second SL BSR starts or restarts the BSR timer, the BSR timer may be restarted or restarted by other events, for example, after the first SL BSR is sent, the BSR timer may be restarted or restarted again, and at this time, the SR configuration of the SL BSR triggered after the restarted or restarted BSR timer is overtime will also be determined according to the logical channel triggering the second SL BSR. That is, after triggering the second SL BSR once, the SR configurations of all the first SL BSRs triggered due to the retransmission BSR timer timeout are determined according to the logical channel that triggered the second SL BSR until a new second SL BSR is triggered again by the logical channel. In other words, the SR configuration of the first SL BSR triggered by the retransmission BSR timer timeout is determined according to the logical channel that triggered the second SL BSR the last time.

For example, the terminal 1 now communicates with only one opposite terminal, that is, only one destination ID is 10, and the previous buffer (buffer) in the destination ID is that (assuming that the higher the LCG number is, the lower the priority is), the logical channel group LCG 7 has data, and the logical channel group LCG 6 also has data, at this time, a data packet belonging to a logical channel j of the logical channel group LCG 2 is newly arrived, and the new data packet satisfies the high priority arrival principle higher than the existing data, and triggers the SL BSR, and at this time, the logical channel triggering the SL BSR is the logical channel j. After the SL BSR is triggered, if there is no resource for sending the SL BSR, SR (scheduling request) triggering needs to be considered, and whether SR can trigger, whether trigger needs to be delayed, how long trigger is delayed, and the specific configuration of SR are all configured according to the logical channels, that is, different logical channels have different SR configurations. The SR configuration corresponding to the SL BSR is determined by the SR configuration corresponding to the logical channel triggering the SL BSR.

After a triggered SL BSR (i.e., the second SL BSR) packet is sent out, a retxsbsr timer is started or restarted for SL BSR retransmission. The retxsbsr timer is also started or restarted each time a new data scheduling resource of the SL Shared Channel (SCH) is received. After the retxsbsr timer times out, if any LCG of any destination ID of the UE still has data to be transmitted, the SL BSR also needs to be triggered continuously to include the report of the data to be transmitted. To distinguish from the normally triggered SL BSR, we call the retxsbsr timer triggered SL BSR the retransmitted SL BSR.

For example, the conventional SL BSR is triggered by the previous SL BSR due to the high priority data arrival of the LCG 2, and the buffering conditions of the LCG 2, the LCG 6, and the LCG 7 are reported, the base station also performs a certain SL resource scheduling, and when the retxsbsr _ timer times out, if only the old data of the LCG 7 is to be sent at this time, the SL BSR MAC Control Element (CE) is organized, and only the report of the data including the LCG 7 is required.

Since the LCG 7 is a logical channel group with a relatively low priority, the logical channels contained in the logical channel group and the corresponding SR configurations thereof may not allow Dedicated SR (Dedicated-SR), i.e., D-SR is performed on a Dedicated uplink resource, or have relatively large SR delay configurations, which is not favorable for transmitting a retransmission SL BSR and obtaining scheduling as soon as possible. Therefore, for the retransmitted SL BSR, the SR configuration corresponding to the logical channel j triggering the initial BSR may be set as the SR configuration corresponding to the retransmitted SL BSR, that is, the logical channel with the higher priority LCG 2 is used to replace the logical channel with the highest priority actually included in the retransmitted SL BSR for SR configuration acquisition, so as to obtain a better SR configuration.

Then, after the replacement, the retransmitted SL BSR will have the SR configuration corresponding to the logical channel j, where the SR configuration may be a dedicated D-SR configuration that can be sent quickly without delay, and the UE sends a scheduling request on the D-SR, and expects the base station to perform uplink resource allocation as soon as possible to send the retransmitted SL BSR.

Optionally, in an embodiment, after the step 202, the method further includes:

and transmitting the SR according to the SR configuration.

In the embodiment of the invention, whether the SR is sent or not can be determined based on the rule for triggering the SR. When determining to transmit the SR, the SR may be transmitted to the network device, and after the network device receives the SR transmitted by the terminal, resource scheduling on Sidelink may be performed on the terminal.

It should be understood that the above-mentioned determination manner of priority corresponding to the SR may be agreed by a protocol or configured by a network device. In this embodiment, the determination method of the priority corresponding to the SR includes any one of the following:

determining the highest priority among priorities corresponding to logical channels contained in the first SL BSR as the priority corresponding to the SR;

and determining the priority corresponding to the logic channel triggering the second SL BSR as the priority corresponding to the SR.

Optionally, the determination method of the priority corresponding to the first SL BSR may also be agreed by a protocol or configured by a network device. In an embodiment, the determining of the priority corresponding to the first SL BSR includes any one of:

determining the highest priority among priorities corresponding to logical channels contained in the first SL BSR as the priority corresponding to the first SL BSR;

and determining the priority corresponding to the logic channel triggering the second SL BSR as the priority corresponding to the first SL BSR.

The priority corresponding to the SR is understood as a transmission priority of the SR, and is associated with (or determined based on) a logical channel, and is used for determining a transmission order of the SR and other data when the SR collides with the other data, and the other data is Uu data (data) or SL data. SR collisions with other data can be understood as: the SR overlaps with other data in time domain resources, and only one terminal can transmit at the same time.

It should be understood that the transmission of the above terminal may include Uu transmission and SL transmission, wherein the Uu transmission includes SL SR, SL BSR, and Uu data (data), the SL SR has separate resources, and the SL BSR and Uu data are common data; the SL transmission includes SL data. Between different interfaces (Uu interface and SL interface) or different resources, because of UE capabilities, only one of them can be transmitted, the priority is high. And aiming at the resource sharing condition, the high priority is sent first, and the low priority is sent later.

To resolve the collision of SR with Uu data and SL data, the transmission order of SR with Uu data and SL data may also be defined, which will be described in detail below.

In one embodiment, in case the SR collides with Uu data,

if the first preset condition is met, the transmission of the SR is prior to the transmission of the Uu data;

if the first preset condition is not met, the Uu data is sent in priority to the SR;

wherein the first preset condition comprises:

the priority corresponding to the SR is smaller than a first preset value;

the priority of a first logical channel corresponding to the Uu data is greater than or equal to a second preset value, and the first logical channel is a logical channel with the highest priority in the logical channels corresponding to the Uu data.

In this embodiment, the SR and the Uu data are respectively compared with different preset values, so as to determine the transmission sequence of the Uu data and the SR. The transmission of the SR described above is prioritized over the transmission of the Uu data, and it can be understood that the transmission priority of the Uu data is lower than that of the SR. The above-described transmission of Uu data prior to the SR transmission can be understood as the transmission priority of Uu data being higher than the transmission priority of SR. The first preset value and the second preset value are both expressed as priority values, and the smaller the value is, the larger the corresponding priority is expressed; the larger the value, the smaller the corresponding priority.

In another embodiment, in case the SR collides with SL data,

if the priority corresponding to the SR is higher than the priority of the second logic channel corresponding to the SL data, the transmission of the SR is prior to the transmission of the SL data;

if the priority corresponding to the SR is lower than the priority of the second logical channel corresponding to the SL data, the sending of the SL data is prior to the sending of the SR;

the second logical channel is a logical channel with the highest priority in the logical channels corresponding to the SL data.

In this embodiment, the SR and SL data may be directly compared as a whole, the transmission order of the SR and SL data is determined, and when the priority corresponding to the SR is higher than the priority of the second logical channel corresponding to the SL data, it is determined that the transmission of the SR is prior to the transmission of the SL data, that is, the transmission priority of the SR is higher than the transmission priority of the SL data; and when the priority corresponding to the SR is lower than that of the second logical channel corresponding to the SL data, determining that the transmission of the SL data is prior to the transmission of the SR, namely the transmission priority of the SR is lower than that of the SL data.

Further, the first SL BSR includes at least one SL BSR entry, and the SL BSR entries correspond to the buffer size information of the logical channel group one to one.

In an embodiment, in case of collision of the first SL BSR with Uu data,

if the SL BSR entry meets a second preset condition, the sending of the SL BSR entry is prior to the sending of the Uu data;

and if the SL BSR entry does not meet the second preset condition, the sending of the Uu data is prior to the sending of the SL BSR entry.

Optionally, the second preset condition includes:

the priority of a fourth logical channel corresponding to the SL BSR entry is smaller than a third preset value;

the priority of a second logic channel corresponding to the Uu data is greater than or equal to a fourth preset value;

wherein, if the priority corresponding to the first SL BSR is the highest priority among the priorities corresponding to the logical channels included in the first SL BSR, the fourth logical channel is the logical channel with the highest priority in the logical channel group associated with the SL BSR entry; if the priority corresponding to the first SL BSR is the priority corresponding to the logical channel triggering the second SL BSR, the fourth logical channel is the logical channel triggering the second SL BSR; the second logical channel is a logical channel with the highest priority in the logical channels corresponding to the Uu data.

In this embodiment, when the first SL BSR collides with Uu data, that is, the resource is limited and is not enough to accommodate all data, which part of the first SL BSR should be prioritized compared with Uu data, and which part of the first SL BSR is transmitted first.

And when the priority corresponding to the first SL BSR is the priority corresponding to the logical channel triggering the second SL BSR, all the entries of the whole first SL BSR use the priority, and when the priority corresponding to the first SL BSR is lower than a third preset value and the Uu data priority is greater than or equal to a fourth preset value, the first SL BSR takes precedence, otherwise, the Uu data takes precedence. The prioritized data is sent first.

When the priority corresponding to the first SL BSR is the highest priority among the priorities corresponding to the logical channels included in the first SL BSR, for the SL BSR entry, the logical channel priority corresponding to the SL BSR entry may be understood as the highest priority of one LCG corresponding to one logical channel with data. And when the corresponding priority of the SL BSR entries is lower than a third preset value and the Uu data priority is greater than or equal to a fourth preset value, giving priority to the SL BSR entries, otherwise giving priority to the Uu data. The prior data is sent first, the whole first SL BSR is split into different SL BSR entries, the prior entry is sent first, then the Uu data, and then the non-prior SL BSR entry is not sent.

In another embodiment, in case of collision of the first SL BSR with SL data,

if the priority corresponding to the first SL BSR is higher than the priority of the second logical channel corresponding to the SL data, the transmission of the first SL BSR is prior to the transmission of the SL data;

if the priority corresponding to the first SL BSR is lower than the priority of the second logical channel corresponding to the SL data, the sending of the SL data is prior to the sending of the first SL BSR;

In this embodiment, when the first SL BSR collides with SL data, i.e. the capability is limited, and Uu and sidelink data cannot be transmitted simultaneously, therefore, the first SL BSR should be compared with SL data, which is the priority, which is transmitted first:

when the priority corresponding to the first SL BSR is the priority corresponding to the logical channel triggering the second SL BSR, the whole first SL BSR uses the priority, SL data is determined by the highest priority to be sent, the priority of the first SL BSR is directly compared with the highest priority of the SL, and who is smaller sends the data first.

When the first SL BSR adopts its own priority, each SL BSR entry, that is, one LCG corresponds to the highest priority of a logical channel with data, may adopt the highest priority contained therein as the priority of the SL BSR, and the SL data is determined by the highest priority to be sent, the priority of the first SL BSR is directly compared with the highest priority of the SL, who is smaller is sent first.

In the embodiment of the invention, the data sending sequence of the SR and the first SL BSR when other data conflict is specified, so that the transmission efficiency of the first SL BSR is ensured, and the transmission efficiency of normal data is also ensured. Thus, system performance and user experience may be improved.

For a better understanding of the present invention, the following detailed description is given by way of specific implementation procedures.

One, the SL BSR procedure is triggered on the retxsbsr timer timeout.

The SL BSR is configured to, when the Sidelink transmitting terminal is in a mode of resource allocation of mode 1 (that is, the transmission resource on the Sidelink is completely scheduled by the base station), report the SL buffer data amount to the base station, and the base station performs resource scheduling on the Sidelink according to the SL BSR.

A sidelink sending terminal, in general, may send data to one or more destination IDs, where one destination ID corresponds to one link, and each link is configured and reported separately:

one destination ID or link can generally configure a plurality of LCGs, for example 8 LCGs;

each LCG can contain a certain number of logical channels, because the maximum number of the logical channels is 32, the logical channels are divided into 8 groups, the logical channels with similar transmission requirements are classified into one LCG, and one LCG reports one BS, thereby improving the reporting efficiency and reducing the reporting overhead.

It should be understood that the SL BSR conventional triggering (which may also be referred to as high priority data arrival) includes two cases:

when data of a logical channel under a certain target address is newly waiting for being sent to the MAC layer and the priority of the logical channel is higher than the highest priority of the logical channels with data to be sent under the same target address,

or, the target address does not have any logic channel to send data before;

After the SL BSR is triggered, the SL BSR MAC CEs are organized according to the situation, and generally, if resources are sufficient, all LCGs with destination IDs of data are included in the SL BSR MAC CEs as much as possible.

For example, the sending terminal 1 now communicates with only one opposite end, that is, only one destination ID is 10, and the buffer in the destination ID is in the previous case (assuming that the higher the LCG number is, the lower the priority is), the logical channel group LCG 7 has data, the logical channel group LCG 6 also has data, and at this time, a packet belonging to a logical channel j in the logical channel group LCG 2 is newly arrived, and the new packet satisfies the high priority arrival principle higher than the existing data, and triggers the SL BSR, and at this time, the logical channel triggering the SL BSR is the logical channel j. After the SL BSR is triggered, if there is no resource for sending the SL BSR, it needs to consider whether to trigger the SR, whether to delay triggering, how long to delay triggering, and the specific configuration of the SR, which are all configured according to the logical channels, that is, different logical channels have different SR configurations. The SR configuration corresponding to the SL BSR is determined by the SR configuration corresponding to the logical channel triggering the SL BSR. The SR triggering determination is made by considering the entire SL BSR as a whole.

When the SL BSR MAC CE is organized, all data information, that is, the BS information of the LCG 2, the BS information of the LCG 6, and the BS information of the LCG 7, is carried as much as possible, and each of the LCG BS information has a priority corresponding thereto, which is the highest priority among all logical channels constituting the LCG. When the SL BSR MAC CE collides with other data, for example, BSR information of the Uu interface, the priority corresponding to BS information (referred to as a SL BSR entry) of each LCG is compared with the highest priority in the Uu BSR, and if the priority corresponding to the SL BSR entry is lower than threshold 1 (the smaller the value, the higher the priority) and the highest logical channel priority in the Uu BSR is greater than or equal to threshold 2, the SL BSR entry is prioritized over the Uu BSR, otherwise the SL BSR entry is not prioritized over the Uu BSR. That is, the entry in each SL BSR is prioritized with the conflicting Uu data when colliding, and the priority may be sent before the Uu data, and the non-priority may only be sent after the Uu data.

After a triggered SL BSR packet is sent out, a retxsbsr timer is started or restarted for SL BSR retransmission. The retxsbsr _ timer is also started or restarted each time a new data scheduling resource of the SL SCH is received.

The retxsbsr timer is used for carrying out timely SL BSR reporting on all data in the buffer, especially low-priority data, when no regular SL BSR trigger (i.e. no high-priority data arrives) or no periodic SL BSR trigger exists, so as to promote the data transmission of the SL.

After the retxsbsr timer times out, if any LCG of any destination ID of the UE still has data to be transmitted, the SL BSR also needs to be triggered continuously to include the report of the data to be transmitted. To distinguish from the normally triggered SL BSR, the SL BSR triggered for the retxsbsr timer may be referred to herein as a retransmitted SL BSR.

Next to the above example, the conventional SL BSR is triggered by the previous SL BSR due to the high priority data arrival of the LCG 2, and the buffering conditions of the LCG 2, the LCG 6, and the LCG 7 are reported, the base station also performs a certain SL resource scheduling, and when the retxsbsr _ timer times out, if only the old data of the LCG 7 is to be sent at this time, the SL BSR MAC CE is organized, and only the report of the data including the LCG 7 is required.

At this time, since the LCG 7 is a logical channel group with a relatively low priority, the logical channels contained in the LCG 7 and their corresponding SR configurations may not allow the Dedicated-SR (i.e., D-SR is performed on the Dedicated uplink resource) to trigger, or there is a relatively large SR delay configuration, which is not favorable for transmitting the retransmitted SL BSR and obtaining scheduling as soon as possible. Therefore, for the retransmitted SL BSR, the SR configuration corresponding to the logical channel j triggering the initial BSR (i.e., the second BSR triggered based on the logical channel) may be set as the SR configuration corresponding to the retransmitted SL BSR, that is, the logical channel with the higher priority LCG 2 replaces the logical channel with the highest priority actually included in the retransmitted SL BSR to perform SR configuration acquisition, so as to obtain a better SR configuration.

Second, SR priority for retransmission SL BSR trigger.

In the above example, a principle of replacing the SR configuration triggered by the retransmitted SL BSR is introduced, so that the logical channel j that normally triggers the initial SL BSR finds the corresponding SR configuration, instead of finding the corresponding SR configuration by adopting the highest logical channel i included in the retransmitted SL BSR. The priority of the logical channel j is far higher than that of the logical channel i, and generally, the SR configuration corresponding to the former is also far better than that corresponding to the latter, for example, the former allows the probability of triggering the dedicated D-SR to be larger, the SR delay to be smaller, the SR period to be denser, and the like, which facilitates the base station to know that uplink resource scheduling needs to be performed more quickly, so as to facilitate the transmission of the retransmitted SL BSR.

For triggered SR transmission, since the trigger is performed according to logical channel j, but the highest priority in the data that really needs to be transmitted is logical channel i, the priority of the SR transmission itself is determined in two ways:

firstly, the transmission priority of the SR is determined according to the logical channel set by triggering the SR, i.e. SL logical channel j;

alternatively, the transmission priority of this SR is determined according to the highest priority contained in the corresponding retransmitted SL BSR, i.e., the SL logical channel i.

One of the two types is specified by the standard, or the network side configures the UE, so that the sending terminal can know the priority rule without error, and can obtain the priority corresponding to the SR transmission at this time.

In an embodiment, when a certain data of the SR and the Uu collides, that is, the data of the SR and the Uu cannot be simultaneously transmitted due to the UE capability limitation, the UE determines according to the following principle:

optionally, when the priority (or transmission priority) of the SL logical channel corresponding to the SR is lower than the threshold 1, and the priority of the Uu data is greater than or equal to the threshold 2, the SR takes precedence, otherwise, the Uu data takes precedence. The prioritized data is sent first.

Optionally, regarding the priority of the Uu data, if the Uu data is data, there is a corresponding logical channel priority, and if the Uu BSR includes multiple pieces of logical channel information, the priority of the entire Uu data block is determined by the highest priority, and the Uu does not split the BSR.

In another embodiment, when the SR and sidelink data collide, that is, the data of the SR and sidelink cannot be transmitted simultaneously due to the UE capability limitation, the UE determines according to the following principle:

the SL logical channel priority corresponding to SR, Sidelink data also have their corresponding priorities, both of which are Sidelink, and which value is small and which is the priority can be directly compared. The prioritized data is sent first.

And thirdly, retransmitting the priority principle of the SL BSR.

The priority processing of the retransmission SL BSR itself has the following two modes:

one is determined according to the priority reset by the retransmitted SL BSR as the priority of the retransmitted SL BSR, namely SL logical channel j;

alternatively, each entry in the retransmitted SL BSR is given its own priority as its priority.

One of the two types is specified by the standard, or one of the two types is configured to the UE by the network side, so that the sending terminal knows the priority without error, and can obtain the priority corresponding to the transmission of the retransmitted SL BSR.

In one embodiment, when the retransmitted SL BSR collides with Uu data, i.e. the resource is limited and not enough to accommodate all data, the retransmitted SL BSR should be compared with Uu data, which part takes precedence, and which part is transmitted first:

optionally, when the retransmission SL BSR assumes a set priority, the entire SL BSR uses the priority, and when the priority corresponding to the SL BSR is lower than the threshold 1 and the Uu data priority is greater than or equal to the threshold 2, the SL BSR takes precedence, otherwise, the Uu data takes precedence. The prioritized data is sent first.

Optionally, when the retransmission SL BSR adopts its own priority, each SL BSR entry, that is, one LCG corresponds to the highest priority of one logical channel with data, when the priority corresponding to the entry is lower than the threshold 1 and the Uu data priority is greater than or equal to the threshold 2, the entry of the SL BSR takes precedence, otherwise, the Uu data takes precedence. The prioritized data is sent first, the entire SL BSR is split into different entries, the prioritized entry is sent first, then the Uu data, and then the non-prioritized entry.

In another embodiment, when the retransmitted SL BSR collides with sidelink data, i.e. the capacity is limited, Uu and sidelink data cannot be transmitted simultaneously, so the retransmitted SL BSR should be compared with sidelink data, which takes precedence, which is transmitted first:

optionally, when the retransmission SL BSR adopts the set priority, the entire SL BSR uses the priority, the sildelink data is determined by the highest priority to be sent, the priority of the SL BSR is directly compared with the highest priority of the sildelink, and who is smaller sends the SL BSR first.

Optionally, when the retransmission SL BSR adopts its own priority, each SL BSR entry, that is, one LCG corresponds to the highest priority of a logical channel with data, the highest priority contained therein is adopted as the priority of the SL BSR, sidelink data is determined by the highest priority to be sent, the priority of the SL BSR is directly compared with the highest priority of sidelink, and who is smaller sends the SL BSR first.

Referring to fig. 3, fig. 3 is a flowchart of another SL BSR processing method according to an embodiment of the present invention, where the method is applied to a network device, and as shown in fig. 3, the method includes the following steps:

step 301, a receiving terminal configures a transmitted SR based on a scheduling request SR of a first SL BSR;

the SR is configured to determine according to a logical channel triggering a second SL BSR, the first SL BSR is a triggered SL BSR when a timer for retransmitting BSRs is overtime and the SL cache contains data to be sent; triggering to start or restart the retransmission BSR timer in case of sending the second SL BSR.

Optionally, the determination manner of the priority corresponding to the SR includes any one of:

Optionally, the determination mode of the priority corresponding to the SR is agreed by a protocol or configured by the network device.

Optionally, in case the SR collides with Uu data,

wherein the first preset condition comprises:

the priority corresponding to the SR is smaller than a first preset value;

Optionally, in case the SR collides with SL data,

Optionally, the first SL BSR includes at least one SL BSR entry, and the SL BSR entries correspond to the buffer size information of the logical channel group one to one.

Optionally, in case that the first SL BSR collides with Uu data,

if the SL BSR entry does not meet the second preset condition, the sending of the Uu data is prior to the sending of the SL BSR entry;

wherein the second preset condition comprises:

the priority of a fourth logical channel corresponding to the SL BSR entry is smaller than a third preset value, and if the priority corresponding to the first SL BSR is the highest priority among the priorities corresponding to the logical channels included in the first SL BSR, the fourth logical channel is the logical channel with the highest priority in the logical channel group associated with the SL BSR entry; or, if the priority corresponding to the first SL BSR is the priority corresponding to the logical channel triggering the second SL BSR, the fourth logical channel is the logical channel triggering the second SL BSR;

and the priority of a second logical channel corresponding to the Uu data is greater than or equal to a fourth preset value, and the second logical channel is a logical channel with the highest priority in the logical channels corresponding to the Uu data.

Optionally, in case that the first SL BSR collides with SL data,

Optionally, the determining manner of the priority corresponding to the first SL BSR includes any one of:

Optionally, the determination manner of the priority corresponding to the first SL BSR is agreed by a protocol or configured by a network device.

It should be noted that, this embodiment is used as an implementation of the network device corresponding to the embodiment shown in fig. 2, and specific implementations thereof may refer to relevant descriptions of the embodiment shown in fig. 2 and achieve the same beneficial effects, and are not described herein again to avoid repeated descriptions.

Referring to fig. 4, fig. 4 is a structural diagram of a terminal according to an embodiment of the present invention, and as shown in fig. 4, the terminal 400 includes:

a triggering module 401, configured to trigger a first SL BSR when a retransmission buffer status report BSR timer is overtime and a sidelink SL buffer includes data to be sent;

a determining module 402, configured to determine, according to a logical channel triggering a second SL BSR, a scheduling request SR configuration of the first SL BSR;

Optionally, the terminal 400 further includes:

and the sending module is used for sending the SR according to the SR configuration.

Optionally, in case the SR collides with Uu data,

wherein the first preset condition comprises:

the priority corresponding to the SR is smaller than a first preset value;

Optionally, in case the SR collides with SL data,

Optionally, in case that the first SL BSR collides with Uu data,

wherein the second preset condition comprises:

Optionally, in case that the first SL BSR collides with SL data,

The terminal provided by the embodiment of the present invention can implement each process implemented by the terminal in the method embodiment of fig. 4, and is not described here again to avoid repetition.

Referring to fig. 5, fig. 5 is a structural diagram of a network device according to an embodiment of the present invention, and as shown in fig. 5, the network device 500 includes:

a receiving module 501, configured to receive an SR sent by a terminal based on a scheduling request SR of a first SL BSR;

Optionally, in case the SR collides with Uu data,

wherein the first preset condition comprises:

the priority corresponding to the SR is smaller than a first preset value;

Optionally, in case the SR collides with SL data,

Optionally, in case that the first SL BSR collides with Uu data,

wherein the second preset condition comprises:

Optionally, in case that the first SL BSR collides with SL data,

The network device provided in the embodiment of the present invention can implement each process implemented by the network device in the method embodiment of fig. 3, and is not described here again to avoid repetition.

Figure 6 is a schematic diagram of the hardware architecture of a terminal implementing various embodiments of the present invention,

the terminal 600 includes but is not limited to: a radio frequency unit 601, a network module 602, an audio output unit 603, an input unit 604, a sensor 605, a display unit 606, a user input unit 607, an interface unit 608, a memory 609, a processor 610, and a power supply 611. Those skilled in the art will appreciate that the terminal configuration shown in fig. 6 is not intended to be limiting, and that the terminal may include more or fewer components than shown, or some components may be combined, or a different arrangement of components. In the embodiment of the present invention, the terminal includes, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted terminal, a wearable device, a pedometer, and the like.

A processor 610, configured to trigger a first SL BSR when the retransmission buffer status report BSR timer is overtime and the sidelink SL buffer includes data to be sent; determining Scheduling Request (SR) configuration of a first SL BSR according to a logic channel triggering a second SL BSR; wherein the retransmission BSR timer is triggered to start or restart under the condition of sending the second SL BSR.

It should be understood that, in this embodiment, the processor 610 and the radio frequency unit 601 can implement each process implemented by the terminal in the method embodiment of fig. 2, and are not described herein again to avoid repetition.

It should be understood that, in the embodiment of the present invention, the radio frequency unit 601 may be used for receiving and sending signals during a message sending and receiving process or a call process, and specifically, receives downlink data from a base station and then processes the received downlink data to the processor 610; in addition, the uplink data is transmitted to the base station. In general, radio frequency unit 601 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. Further, the radio frequency unit 601 may also communicate with a network and other devices through a wireless communication system.

The terminal provides wireless broadband internet access to the user through the network module 602, such as helping the user send and receive e-mails, browse web pages, and access streaming media.

The audio output unit 603 may convert audio data received by the radio frequency unit 601 or the network module 602 or stored in the memory 609 into an audio signal and output as sound. Also, the audio output unit 603 can also provide audio output related to a specific function performed by the terminal 600 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 603 includes a speaker, a buzzer, a receiver, and the like.

The input unit 604 is used to receive audio or video signals. The input Unit 604 may include a Graphics Processing Unit (GPU) 6041 and a microphone 6042, and the Graphics processor 6041 processes image data of a still picture or video obtained by an image capturing apparatus (such as a camera) in a video capture mode or an image capture mode. The processed image frames may be displayed on the display unit 606. The image frames processed by the graphic processor 6041 may be stored in the memory 609 (or other storage medium) or transmitted via the radio frequency unit 601 or the network module 602. The microphone 6042 can receive sound, and can process such sound into audio data. The processed audio data may be converted into a format output transmittable to a mobile communication base station via the radio frequency unit 601 in case of the phone call mode.

The terminal 600 also includes at least one sensor 605, such as a light sensor, motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor that can adjust the brightness of the display panel 6061 according to the brightness of ambient light, and a proximity sensor that can turn off the display panel 6061 and/or the backlight when the terminal 600 is moved to the ear. As one of the motion sensors, the accelerometer sensor can detect the magnitude of acceleration in each direction (generally three axes), detect the magnitude and direction of gravity when stationary, and can be used to identify the terminal posture (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration identification related functions (such as pedometer, tapping), and the like; the sensors 605 may also include fingerprint sensors, pressure sensors, iris sensors, molecular sensors, gyroscopes, barometers, hygrometers, thermometers, infrared sensors, etc., which are not described in detail herein.

The display unit 606 is used to display information input by the user or information provided to the user. The Display unit 606 may include a Display panel 6061, and the Display panel 6061 may be configured by a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like.

The user input unit 607 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the terminal. Specifically, the user input unit 607 includes a touch panel 6071 and other input devices 6072. Touch panel 6071, also referred to as a touch screen, may collect touch operations by a user on or near it (e.g., operations by a user on or near touch panel 6071 using a finger, stylus, or any suitable object or accessory). The touch panel 6071 may include two parts of a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 610, receives a command from the processor 610, and executes the command. In addition, the touch panel 6071 can be implemented by various types such as a resistive type, a capacitive type, an infrared ray, and a surface acoustic wave. The user input unit 607 may include other input devices 6072 in addition to the touch panel 6071. Specifically, the other input devices 6072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a track ball, a mouse, and a joystick, which are not described herein again.

Further, the touch panel 6071 can be overlaid on the display panel 6061, and when the touch panel 6071 detects a touch operation on or near the touch panel 6071, the touch operation is transmitted to the processor 610 to determine the type of the touch event, and then the processor 610 provides a corresponding visual output on the display panel 6061 according to the type of the touch event. Although in fig. 6, the touch panel 6071 and the display panel 6061 are two independent components to realize the input and output functions of the terminal, in some embodiments, the touch panel 6071 and the display panel 6061 may be integrated to realize the input and output functions of the terminal, and this is not limited here.

The interface unit 608 is an interface for connecting an external device to the terminal 600. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The interface unit 608 may be used to receive input (e.g., data information, power, etc.) from an external device and transmit the received input to one or more elements within the terminal 600 or may be used to transmit data between the terminal 600 and an external device.

The memory 609 may be used to store software programs as well as various data. The memory 609 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. Further, the memory 609 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.

The processor 610 is a control center of the terminal, connects various parts of the entire terminal using various interfaces and lines, and performs various functions of the terminal and processes data by operating or executing software programs and/or modules stored in the memory 609 and calling data stored in the memory 609, thereby performing overall monitoring of the terminal. Processor 610 may include one or more processing units; preferably, the processor 610 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 610.

The terminal 600 may further include a power supply 611 (e.g., a battery) for supplying power to the various components, and preferably, the power supply 611 is logically connected to the processor 610 via a power management system, so that functions of managing charging, discharging, and power consumption are performed via the power management system.

In addition, the terminal 600 includes some functional modules that are not shown, and are not described in detail herein.

Preferably, an embodiment of the present invention further provides a terminal, including a processor 610, a memory 609, and a computer program stored in the memory 609 and capable of running on the processor 610, where the computer program, when executed by the processor 610, implements each process of the above-mentioned SL BSR processing method embodiment, and can achieve the same technical effect, and in order to avoid repetition, details are not described here again.

Referring to fig. 7, fig. 7 is a block diagram of another network device according to an embodiment of the present invention, and as shown in fig. 7, the network device 700 includes: a processor 701, a transceiver 702, a memory 703 and a bus interface, wherein:

a transceiver 702, configured to receive an SR sent by a terminal based on a scheduling request SR configuration of a first SL BSR;

It should be understood that, in this embodiment, the processor 701 and the transceiver 702 may implement each process implemented by the network device in the method embodiment of fig. XX, and details are not described here to avoid repetition.

In fig. 7, the bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by processor 701, and various circuits, represented by memory 703, being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 702 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium. The user interface 704 may also be an interface capable of interfacing with a desired device for different user devices, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

The processor 701 is responsible for managing the bus architecture and general processing, and the memory 703 may store data used by the processor 701 in performing operations.

Preferably, an embodiment of the present invention further provides a network device, including a processor 701, a memory 703, and a computer program stored in the memory 703 and capable of running on the processor 701, where the computer program, when executed by the processor 701, implements each process of the above-mentioned SL BSR processing method embodiment, and can achieve the same technical effect, and in order to avoid repetition, details are not described here again.

An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements each process of the SL BSR processing method embodiment on the network device side provided in the embodiment of the present invention, or when the computer program is executed by a processor, the computer program implements each process of the SL BSR processing method embodiment on the terminal side provided in the embodiment of the present invention, and can achieve the same technical effect, and in order to avoid repetition, details are not described here again. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a base station) to execute the method according to the embodiments of the present invention.

While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A method for processing a Buffer Status Report (BSR) of a Side Link (SL) is applied to a terminal and is characterized by comprising the following steps:

wherein the retransmission BSR timer is triggered to start or restart under the condition of sending the second SL BSR.

2. The method of claim 1, wherein after determining the Scheduling Request (SR) configuration of the first SL BSR according to the logical channel triggering the second SL BSR, the method further comprises:

and transmitting the SR according to the SR configuration.

3. The method according to claim 2, wherein the priority corresponding to the SR is determined by any one of:

4. The method of claim 3, wherein the priority corresponding to the SR is determined by protocol agreement or configuration of a network device.

5. The method according to claim 2, wherein in case of a collision of the SR with Uu data,

wherein the first preset condition comprises:

the priority corresponding to the SR is smaller than a first preset value;

6. The method of claim 2, wherein in the event of a collision of the SR with SL data,

7. The method of claim 1, wherein the first SL BSR comprises at least one SL BSR entry, and wherein the SL BSR entries correspond to buffer size information of a logical channel group in a one-to-one manner.

8. The method of claim 7, wherein in case of collision of the first SL BSR with Uu data,

wherein the second preset condition comprises:

9. The method of claim 1, wherein in case of collision of the first SL BSR with SL data,

10. The method according to claim 1, wherein the determining of the priority corresponding to the first SL BSR comprises any one of:

11. The method of claim 10, wherein a determination manner of the priority corresponding to the first SL BSR is configured by a protocol convention or a network device.

12. A method for processing a Buffer Status Report (BSR) of a Side Link (SL) is applied to a network device, and is characterized by comprising the following steps:

13. The method according to claim 12, wherein the priority corresponding to the SR is determined by any one of:

14. The method of claim 13, wherein the priority corresponding to the SR is determined by protocol agreement or network equipment configuration.

15. The method of claim 12, wherein in case of a collision of the SR with Uu data,

wherein the first preset condition comprises:

the priority corresponding to the SR is smaller than a first preset value;

16. The method of claim 12, wherein in case of a collision of the SR with SL data,

17. The method of claim 12, wherein the first SL BSR comprises at least one SL BSR entry, and wherein the SL BSR entries correspond to buffer size information of a logical channel group in a one-to-one manner.

18. The method of claim 17, wherein in case of collision of the first SL BSR with Uu data,

wherein the second preset condition comprises:

19. The method of claim 12, wherein in case of collision of the first SL BSR with SL data,

20. The method according to claim 12, wherein the determining of the priority corresponding to the first SL BSR comprises any one of:

21. The method of claim 20, wherein a determination manner of the priority corresponding to the first SL BSR is configured by a protocol convention or a network device.

22. A terminal, comprising:

23. A network device, comprising:

24. A terminal, comprising: a memory, a processor and a program stored on the memory and executable on the processor, the program, when executed by the processor, implementing the steps in the SL BSR processing method according to any of the claims 1 to 11.

25. A network device, comprising: a memory, a processor and a program stored on the memory and executable on the processor, the program when executed by the processor implementing the steps in the SL BSR processing method according to any of the claims 12 to 21.

26. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored thereon a computer program which, when executed by a processor, implements the steps of the SL BSR processing method according to any of the claims 1 to 21.