CN112492695B

CN112492695B - Method and device for transmitting sidelink BSR

Info

Publication number: CN112492695B
Application number: CN201910860191.1A
Authority: CN
Inventors: 郑倩; 杨晓东; 鲍炜
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2019-09-11
Filing date: 2019-09-11
Publication date: 2022-11-11
Anticipated expiration: 2039-09-11
Also published as: WO2021047557A1; CN112492695A

Abstract

The embodiment of the invention discloses a sidelink BSR transmission method and equipment, which are used for reducing resource overhead of reporting the sidelink BSR. The method can be executed by a terminal device and comprises the following steps: sending a sidelink BSR; wherein the sidelink BSR format is a fixed length. In the embodiment of the invention, the format of the sidelink BSR does not need an indication domain for indicating the length of the sidelink BSR, thereby reducing the reporting overhead of the sidelink BSR and being convenient for improving the communication efficiency of the sidelink.

Description

Method and device for transmitting sidelink BSR

Technical Field

The present invention relates to the field of communications, and in particular, to a method and an apparatus for transmitting a sidelink (or translated into a sidelink, or the like) Buffer Status Report (BSR).

Background

A Long Term Evolution (LTE) system supports sidelink from the 12 th release for direct data transmission between terminal devices without a network device. New Radio (NR) systems will support more advanced sidelink transmission designs to support more comprehensive traffic types.

Currently, LTE and NR terminal devices may report a sidelink BSR, so that a network device may know a sidelink data amount to be sent by the terminal device, and perform resource scheduling according to the sidelink data amount to be sent by the terminal device. However, in the related art, the reporting overhead of the sidelink BSR is relatively large, which may cause that the sidelink BSR cannot be reported in time under certain circumstances, thereby delaying resource scheduling for communication of the sidelink terminal device.

Disclosure of Invention

The embodiment of the invention aims to provide a sidelink BSR transmission method and equipment, which are used for reducing the resource overhead of reporting the sidelink BSR.

In a first aspect, a sidelink BSR sending method is provided, where the method is performed by a terminal device, and the method includes:

transmitting a sidelink BSR; wherein the sidelink BSR format is a fixed length.

In a second aspect, a sidelink BSR receiving method is provided, where the method is performed by a network device, and the method includes:

receiving a sidelink BSR; wherein the sidelink BSR format is a fixed length.

In a third aspect, a terminal device is provided, where the terminal device includes:

a sending module, configured to send a sidelink BSR; wherein the sidelink BSR format is a fixed length.

In a fourth aspect, a network device is provided, the network device comprising:

a receiving module, configured to receive a sidelink BSR; wherein the sidelink BSR format is a fixed length.

In a fifth aspect, a terminal device is provided, the terminal device includes a processor, a memory, and a computer program stored in the memory and operable on the processor, and when executed by the processor, the computer program implements the steps of the sidelink BSR transmitting method according to the first aspect.

In a sixth aspect, a network device is provided, which comprises a processor, a memory and a computer program stored on the memory and operable on the processor, the computer program, when executed by the processor, implementing the steps of the sidelink BSR receiving method according to the second aspect.

In a seventh aspect, a computer readable storage medium is provided, on which a computer program is stored, which when executed by a processor, implements the steps of the sidelink BSR transmitting/receiving method according to the first and second aspects.

In the embodiment of the invention, the terminal equipment sends the sidelink BSR, the format of the sidelink BSR is a fixed length, and an indication domain for indicating the length of the sidelink BSR is not needed in the format of the sidelink BSR, so that the resource overhead for reporting the sidelink BSR is reduced, and the communication efficiency of the sidelink is improved conveniently.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

fig. 1 is a schematic flow chart of a sidelink BSR transmission method according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a sidelink BSR format according to an embodiment of the present invention;

FIG. 3 is a diagram of a MAC subheader in a sidelink BSR format according to an embodiment of the invention;

FIG. 4 is a diagram of a MAC CE in a sidelink BSR format according to an embodiment of the invention;

FIG. 5 is a schematic diagram of a MAC CE in a sidelink BSR format according to another embodiment of the present invention;

FIG. 6 is a schematic diagram of a MAC CE in a sidelink BSR format according to yet another embodiment of the present invention;

fig. 7 is a schematic flow chart of a sidelink BSR receiving method according to another embodiment of the present invention;

fig. 8 is a schematic structural diagram of a terminal device according to an embodiment of the present invention;

FIG. 9 is a schematic block diagram of a network device according to one embodiment of the present invention;

fig. 10 is a schematic structural diagram of a terminal device according to another embodiment of the present invention;

fig. 11 is a schematic structural diagram of a network device according to another embodiment of the present invention.

Detailed Description

To make the objects, technical solutions and advantages of the present application more clear, the technical solutions of the present application will be clearly and completely described below with reference to specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only a few embodiments of the present application, and not all embodiments. 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 application. "and/or" in various embodiments of the present specification means at least one of before and after.

It should be understood that the technical solutions of the embodiments of the present invention can be applied to various communication systems, for example: an LTE sidelink system, an NR sidelink system, or a subsequently evolved communication system.

In the embodiment of the present invention, the Terminal device may include, but is not limited to, a Mobile Station (MS), a Mobile Terminal (Mobile Terminal), a Mobile phone (Mobile Telephone), a User Equipment (UE), a handset (handset) and a portable device (portable device), a vehicle (vehicle), and the like, and the Terminal device may communicate with one or more core networks through a Radio Access Network (RAN), for example, the Terminal device may be a Mobile phone (or "cellular" phone), a computer with a wireless communication function, and the Terminal device may also be a portable, pocket, handheld, computer built-in, or vehicle-mounted Mobile apparatus.

In the embodiment of the invention, the network equipment is a device which is deployed in a wireless access network and used for providing a wireless communication function for the terminal equipment. The network device may be a base station, and the base station may include various macro base stations, micro base stations, relay stations, access points, and the like. In systems employing different radio access technologies, the names of devices having a base station function may differ. For example, in an LTE network, called an Evolved Node B (eNB or eNodeB), in a third generation (3 rd generation,3 g) network, called a Node B (Node B), or a network device in a subsequent Evolved communication system, etc., although the terms are not limiting.

As shown in fig. 1, an embodiment of the present invention provides a sidelink BSR transmitting method 100, which may be performed by a terminal device, in other words, by software or hardware installed in the terminal device, and includes the following steps:

s102: and transmitting the sidelink BSR, wherein the format of the sidelink BSR is a fixed length.

The format of the sidelink BSR provided by the embodiment of the present invention is a fixed length, and in order to facilitate distinguishing from the sidelink BSR in the prior art, the sidelink BSR may also be referred to as a short sidelink BSR or a short sidelink BSR in the subsequent method embodiment.

In the embodiment of the present invention, a sidelink terminal device (hereinafter, referred to as a terminal device for short) may send a short sidelink BSR to a network device, and tell the network device about the quantity of sidelink data to be sent of all Logical channels in a Logical Channel Group (LCG) based on a short-range service Destination address (Destination).

Specifically, the terminal device inserts a sidelink BSR MAC Control Element (CE) in a Protocol Data Unit (PDU) of a Medium Access Control (MAC) layer, and the sidelink BSR MAC CE format is identified by a sidelink MAC subheader (subheader) format.

According to the sending method of the sidelink BSR provided by the embodiment of the invention, the terminal equipment sends the sidelink BSR, the format of the sidelink BSR is a fixed length, and an indication domain for indicating the length of the sidelink BSR is not needed in the sidelink BSR format, so that the resource overhead for reporting the sidelink BSR is reduced, and the communication efficiency of the sidelink is improved conveniently.

For the short sidelink BSR mentioned in the above embodiments, in one embodiment, as shown in fig. 2, the short sidelink BSR format includes two parts, namely, a sidelink MAC sub-header and a sidelink fixed-length MAC control element (fixed-sized MAC CE), and the short sidelink BSR format is identified by the sidelink MAC sub-header format.

The sidelink mac subheader includes a reserved bit R field and a Logical Channel Identity (LCID) field, which occupy 1 byte, as shown in fig. 3.

Optionally, in order to identify the type of the new short sidelink BSR format, the new short sidelink BSR format may be identified by introducing a newly defined LCID value; alternatively, the LCID value of the existing sidelink BSR is reused, and the distinction is made by the value of the R field.

For example, the embodiment of the present invention uses a logical channel identifier value different from that in the prior art, for example, a certain value-40 of NR UL-SCH reserved LCID values 33-51 is selected to identify the type of the new short sidelink BSR format provided by the embodiment of the present invention.

For another example, the embodiment of the present invention reuses the logical channel identifier value in the prior art, for example, selects the same value as LCID value 61 of NR short BSR, and identifies the type of the new short sidelink BSR format provided by the embodiment of the present invention through the bit value (for example, 01/10/11) of R field.

It should be noted that, in the embodiment of the present invention, the placing order of the R field and the LCID field in fig. 3 is not specifically limited, and the LCID field may be located before the R field, and the R field may be located after the LCID field.

While the foregoing embodiments describe the format of the sidelink MAC subheader, the sidelink fixed-length MAC CE format, which occupies 1 byte or 2 bytes, is described in three specific embodiments below.

Example 1

As shown in fig. 4, the sidelink fixed-length MAC CE includes only a Destination Index (Destination Index) field and a logical channel group identification (LCG ID) field, occupies 1 byte in total, and does not include a buffer size field.

The Destination Index field includes a Destination Index, and the LCG ID field includes an LCG ID.

In addition, in the embodiment of the present invention, the placement order of the Destination Index field and the LCG ID field shown in fig. 4 is not limited, and the location of the LCG ID field may be before and the location of the Destination Index field may be after.

This embodiment 1 can let the network device know in time which logical channel group level sidelink buffer data is to be sent for which destination address the terminal device has with the minimum overhead (1 byte).

In this embodiment 1, since the sidelink fixed-length MAC CE format does not include a buffer size field, optionally, the network device may perform resource scheduling based on an implementation algorithm, for example, the network device performs resource scheduling based on a minimum value/a maximum value/an average value allowed by the sidelink buffer size, or performs resource scheduling based on a buffer size reported by the terminal device in history, and the like.

Example 2

As shown in fig. 5, the sidelink fixed-length MAC CE includes only a Buffer Size (Buffer Size) field, occupies 1 byte, and does not include a Destination Index field and an LCG ID field.

Further, when using the sidelink fixed-length MAC CE provided in embodiment 2 to perform sidelink BSR reporting, the embodiment of the present invention defines a default reporting method, that is, the Buffer Size reported by the terminal device and the network device agrees to understand corresponds to one of the following situations:

1) Buffer Size for presetting LCG ID, for example, buffer Size for the smallest numbered LCG ID;

2) Buffer Size of a preset destination index, for example, buffer Size of a destination index with the smallest/largest number;

3) And presetting Buffer Size of LCG identification under the preset destination index.

Optionally, the Buffer Size reported by the terminal device and the network device agreeing to understand is the Size of the buffered data of all logical channels corresponding to the LCG ID minimum and Destination Index minimum (or maximum).

For example, when the sidelink BSR report is performed using the sidelink fixed-length MAC CE provided in embodiment 2, the default is the size of all logical channel buffer data corresponding to LCG ID =0 and destination index = 0.

For another example, when the sidelink BSR report is performed using the sidelink fixed-length MAC CE provided in embodiment 2, the default is the size of all logical channel buffer data corresponding to LCG ID =0 and destination index = 15.

In embodiment 2, the network device can know how many sidelink cache data are to be sent in time with the minimum overhead (1 byte). Of course, the embodiment usually needs to agree in advance on the Destination Index and LCG ID corresponding to the reported Buffer Size.

Example 3

As shown in fig. 6, the sidelink fixed-length MAC CE includes a Destination Index field, an LCG ID field, and a Buffer Size field, and occupies 2 bytes in total.

The Destination Index field comprises a Destination Index, the LCG ID field comprises LCG ID, and the Buffer Size field comprises Buffer Size; this Buffer Size corresponds to the Buffer Size of LCG ID in the Destination Index.

It should be noted that, in the embodiment of the present invention, the order of placing the Destination Index field, the LCG ID field, and the Buffer Size field shown in fig. 6 is not limited, and may be any possible order combination.

This embodiment 3 can make the network device accurately know which Destination Index and LCG ID combination corresponds to a specific Buffer Size, so the network device can perform accurate resource scheduling, and of course, this embodiment 3 has 1 byte more resource overhead than

embodiments

1 and 2.

In the sidelink BSR transmission methods described in the foregoing embodiments, the sidelink BSR transmitted by the terminal device may include a sidelink padding BSR and/or a sidelink non-padding BSR, and these various cases will be described below.

1) For the case of non-padding BSR, i.e. when the MAC PDU to be assembled can accommodate the size of the sidelink target BSR plus the target MAC subheader of the sidelink target BSR:

in this case, if the terminal has only one LCG and/or one Destination Index that has/have sidelink buffer data to send, the format of short sidelink BSR provided in the above embodiment of the present invention (for example, any one of embodiments 1/2/3) is used to report the sidelink BSR.

It should be noted that, the sidelink target BSR mentioned in this embodiment and the subsequent embodiments may specifically be a sidelink BSR in the prior art, where the sidelink BSR in the prior art is variable in length, and a length L field is required in a target MAC subheader for identifying a format of the sidelink target BSR to indicate the length of the sidelink target BSR; and carries at least one set of Destination Index, LCG ID, and Buffer Size.

2) For the padding BSR, that is, when the padding bit number of the MAC PDU to be assembled is greater than or equal to the size of the short sidelink BSR plus the MAC subheader of the short sidelink BSR provided in the embodiment of the present invention, but is smaller than the size of the target BSR plus the target MAC subheader of the sidelink target BSR:

in this case, if only one LCG and/or one Destination Index of the terminal device has sidelink buffer data to send, the short sidelink BSR format (for example, any one of embodiments 1/2/3) provided in the foregoing embodiment of the present invention is used to report the sidelink BSR.

In this case, if the terminal device has more than one LCG and/or more than one Destination Index and has sidelink buffer data to be sent, the short sidelink BSR format (for example, any one of the above embodiments 1/3) provided by the above embodiments of the present invention is used to report the sidelink BSR. As shown in fig. 4 or fig. 6, the reported sidelink BSR carries an LCG ID and a Destination Index, where the LCG ID and the Destination Index carried by the sidelink BSR are an LCG ID and a Destination Index corresponding to a logical channel with the highest priority among all logical channels to which sidelink buffer data is to be sent.

The sending method of the sidelink BSR provided in the above embodiments of the present invention, because the resource overhead of reporting the sidelink BSR is relatively small, under some circumstances, for example, the uplink resource is not enough to report the buffer size information of all LCGs and destinations, or the spare padding bits of the uplink resource can be used to report the buffer sizes of part of LCGs and destinations, so that the sidelink BSR can be timely reported to the network device, the resource scheduling can be timely performed on the sidelink terminal device, and the communication efficiency of the sidelink can be conveniently improved.

The sidelink BSR transmission method according to the embodiment of the present invention is described in detail above with reference to fig. 1 to 6. A sidelink BSR receiving method according to another embodiment of the present invention will be described in detail below with reference to fig. 7. It is to be understood that the interaction between the network device and the terminal device described from the network device side is the same as that described at the terminal device side in the method shown in fig. 1, and the related description is appropriately omitted to avoid redundancy.

Fig. 7 is a schematic diagram illustrating an implementation flow of the sidelink BSR receiving method according to the embodiment of the present invention, which may be applied to a network device side. As shown in fig. 7, the method 700 includes:

s702: a sidelink BSR is received, which is formatted in a fixed length format.

In the sidelink BSR receiving method provided in the embodiments of the present invention, the network device receives the sidelink BSR, the sidelink BSR format is a fixed length, and an indication field for indicating the length is not required in the sidelink BSR format, so that the resource overhead for reporting the sidelink BSR is reduced, and the communication efficiency of the sidelink is improved conveniently.

Optionally, as an embodiment, the sidelink BSR format includes a destination index field and an LCG identification field:

wherein the destination index field comprises a destination index, and the LCG identification field comprises LCG identification.

Optionally, as an embodiment, the sidelink BSR format includes a buffer size field;

wherein the cache size field comprises a cache size;

the cache size corresponds to one of the following conditions:

presetting the cache size of the LCG identifier;

presetting the cache size of the destination index;

and presetting the cache size of the LCG identifier under the destination index.

Optionally, as an embodiment, the sidelink BSR format includes a destination index field, an LCG identifier field, and a buffer size field;

the destination index domain comprises a destination index, the LCG identification domain comprises LCG identification, and the cache size domain comprises cache size;

the cache size corresponds to the cache size of the LCG identifier under the destination index.

Optionally, as an embodiment, after receiving the sidelink BSR, the method further includes:

identifying the format of the sidelink BSR through the MAC subheader format of the sidelink BSR;

wherein the MAC subheader format comprises an R field and an LCID field.

Optionally, as an embodiment, the identifying the sidelink BSR format through the MAC subheader format of the sidelink BSR includes:

identifying the sidelink BSR format through the value of the R domain, wherein LCID included in the LCID domain is reused by Uu port LCID; or

And identifying the sidelink BSR format through the LCID of the LCID domain, wherein the LCID is newly defined.

The sidelink BSR transmission method according to the embodiment of the present invention is described in detail above with reference to fig. 1 to 7. A terminal device according to an embodiment of the present invention will be described in detail below with reference to fig. 8.

Fig. 8 is a schematic structural diagram of a terminal device according to an embodiment of the present invention. As shown in fig. 8, the terminal apparatus 800 includes:

a sending module 802, configured to send sidelink BSR; wherein the sidelink BSR format is a fixed length.

Optionally, as an embodiment, the sidelink BSR format includes a destination index field and an LCG identification field;

wherein the cache size field comprises a cache size;

the cache size corresponds to one of the following conditions:

presetting the cache size of the LCG identifier;

presetting the cache size of the destination index;

buffer size of preset LCG (logical control group) identifier under preset destination index

Optionally, as an embodiment, the sidelink BSR format includes a destination index domain, an LCG identifier domain, and a buffer size domain;

Optionally, as an embodiment, the sidelink BSR format is identified by a MAC subheader format, where the MAC subheader format includes a reserved bit R field and a logical channel identifier LCID field;

wherein, the value of the R field is used for indicating the type of the sidelink BSR format, and the LCID included in the LCID field is reused by Uu LCID; or

The LCID field comprises LCIDs which are newly defined and are used for indicating the type of the sidelink BSR format.

Optionally, as an embodiment, the sidelink BSR includes a sidelink padding BSR and/or a sidelink non-padding BSR.

Optionally, as an embodiment, the sending module 802 may be configured to:

the method comprises the steps that when only one LCG and/or one destination has/have sidelink cache data to be sent, the sidelink BSR is sent;

wherein the sidelink BSR is a sidelink non-padding BSR.

Optionally, as an embodiment, the sending module 802 may be configured to:

when the filling bit number of the MAC PDU to be assembled is larger than or equal to the size of the MAC sub-head of the sidelink BSR plus the sidelink BSR, but is smaller than the size of the MAC sub-head of the sidelink target BSR plus the sidelink target BSR, sending the sidelink BSR;

wherein the sidelink BSR is a sidelink padding BSR.

Optionally, as an embodiment, the terminal device has only one LCG and/or one destination to which sidelink buffered data is to be sent.

Optionally, as an embodiment, the terminal device has multiple LCGs and/or multiple destinations have sidelink cache data to send; the sidelink BSR carries an LCG identifier and a destination index, and the LCG identifier and the destination index carried by the sidelink BSR are corresponding to the LCG identifier and the destination index of the logic channel with the highest priority in all logic channels to which the sidelink cache data are to be sent.

The terminal device 800 according to the embodiment of the present invention may refer to the process corresponding to the method 100 according to the embodiment of the present invention, and each unit/module and the other operations and/or functions in the terminal device 800 are respectively for realizing the corresponding process in the method 100 and achieving the same or equivalent technical effects, and for brevity, are not described again here.

Fig. 9 is a schematic structural diagram of a network device according to an embodiment of the present invention. As shown in fig. 9, the network device 900 includes:

a receiving module 902, configured to receive sidelink BSR; wherein the sidelink BSR format is a fixed length.

In the embodiment of the invention, the network equipment receives the sidelink BSR, the format of the sidelink BSR is fixed length, and the sidelink BSR format does not need an indication domain for indicating the length, thereby reducing the resource overhead of reporting the sidelink BSR and being convenient for improving the communication efficiency of the sidelink.

wherein the cache size field comprises a cache size;

the cache size corresponds to one of the following:

presetting the cache size of the LCG identifier;

presetting the cache size of the destination index;

the destination index field comprises a destination index, the LCG identification field comprises LCG identification, and the cache size field comprises cache size;

Optionally, as an embodiment, the receiving module 902 may be further configured to:

wherein the MAC subheader format comprises an R field and an LCID field.

The network device 900 according to the embodiment of the present invention may refer to the flow corresponding to the method 700 according to the embodiment of the present invention, and each unit/module and the other operations and/or functions in the network device 900 are respectively for implementing the corresponding flow in the method 700 and achieving the same or equivalent technical effects, and for brevity, no further description is provided here.

Fig. 10 is a block diagram of a terminal device of another embodiment of the present invention. The terminal device 1001000 illustrated in fig. 10 includes: at least one processor 1001001, memory 1001002, at least one network interface 1004, and a user interface 1003. The various components in terminal device 1000 are coupled together by a bus system 1005. It is understood that bus system 1005 is used to enable communications among the components connected. The bus system 1005 includes a power bus, a control bus, and a status signal bus, in addition to a data bus. But for the sake of clarity the various busses are labeled in figure 10 as the bus system 1005.

The user interface 1003 may include, among other things, a display, a keyboard, a pointing device (e.g., a mouse, trackball, etc.), a touch pad, or a touch screen.

It is to be understood that the memory 1002 in embodiments of the present invention may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The non-volatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash Memory. Volatile Memory can be Random Access Memory (RAM), which acts as external cache Memory. By way of illustration and not limitation, many forms of RAM are available, such as Static random access memory (Static RAM, SRAM), dynamic Random Access Memory (DRAM), synchronous Dynamic random access memory (Synchronous DRAM, SDRAM), double Data Rate Synchronous Dynamic random access memory (ddr Data Rate SDRAM, ddr SDRAM), enhanced Synchronous SDRAM (ESDRAM), synchlink DRAM (SLDRAM), and Direct Rambus RAM (DRRAM). The memory 1002 of the subject systems and methods is intended to comprise, without being limited to, these and any other suitable types of memory.

In some embodiments, memory 1002 stores the following elements, executable modules or data structures, or a subset thereof, or an expanded set thereof: an operating system 10021 and applications 10022.

The operating system 10021 includes various system programs, such as a framework layer, a core library layer, a driver layer, and the like, and is used for implementing various basic services and processing hardware-based tasks. The application 10022 includes various applications, such as a Media Player (Media Player), a Browser (Browser), and the like, for implementing various application services. The program implementing the method according to the embodiment of the present invention may be included in the application program 10022.

In this embodiment of the present invention, the terminal device 1000 further includes: a computer program stored on the memory 1002 and executable on the processor 1001, the computer program, when executed by the processor 1001, implementing the steps of the method 100 as follows.

The method disclosed by the embodiment of the invention can be applied to the processor 1001 or can be implemented by the processor 1001. The processor 1001 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be implemented by integrated logic circuits of hardware or instructions in the form of software in the processor 1001. The Processor 1001 may be a general-purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, or discrete hardware components. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software modules may reside in ram, flash memory, rom, prom, or eprom, registers, among other computer-readable storage media known in the art. The computer readable storage medium is located in the memory 1002, and the processor 1001 reads the information in the memory 1002 and combines the hardware to complete the steps of the above-described method. In particular, the computer readable storage medium has a computer program stored thereon, which when executed by the processor 1001 implements the steps of the embodiments of the method 100 as described above.

It is to be understood that the embodiments described herein may be implemented in hardware, software, firmware, middleware, microcode, or any combination thereof. For a hardware implementation, the Processing units may be implemented within one or more Application Specific Integrated Circuits (ASICs), digital Signal Processors (DSPs), digital Signal Processing Devices (DSPDs), programmable Logic Devices (PLDs), field Programmable Gate Arrays (FPGAs), general purpose processors, controllers, micro-controllers, microprocessors, other electronic units configured to perform the functions described herein, or a combination thereof.

For a software implementation, the techniques described in this embodiment of the present invention may be implemented with modules (e.g., procedures, functions, and so on) that perform the functions described in this embodiment of the present invention. The software codes may be stored in a memory and executed by a processor. The memory may be implemented within the processor or external to the processor.

Terminal device 1000 can implement each process implemented by the terminal device in the foregoing embodiments, and can achieve the same or equivalent technical effects, and for avoiding repetition, details are not described here again.

Referring to fig. 11, fig. 11 is a structural diagram of a network device applied in the embodiment of the present invention, which can implement details of method embodiment 700 and achieve the same effects. As shown in fig. 11, the network device 1100 includes: a processor 1101, a transceiver 1102, a memory 1103, and a bus interface, wherein:

in this embodiment of the present invention, the network device 1100 further includes: a computer program stored on the memory 1103 and executable on the processor 1101, the computer program, when executed by the processor 1101, implementing the steps of the method 700.

In fig. 11, the bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by processor 1101, and various circuits, represented by memory 1103, 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 1102 may be a plurality of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium.

The processor 1101 is responsible for managing the bus architecture and general processing, and the memory 1103 may store data used by the processor 1101 in performing operations.

An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored, and when the computer program is executed by a processor, the computer program implements the processes in the method embodiment 100 and the method embodiment 700, and can achieve the same technical effects, and in order to avoid repetition, the computer program is not described herein 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 phrases "comprising a component of' 8230; \8230;" does not exclude the presence of another like element 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 network device) 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 transmitting a sidelink BSR, the method being performed by a terminal device, the method comprising:

transmitting a secondary link Buffer Status Report (BSR); wherein the sidelink BSR format is a fixed length, and the fixed length is 1 byte;

the transmitting the sidelink BSR includes: under the condition that only one logic channel group LCG and/or one destination has sidelink buffer data to be sent, sending the sidelink BSR; wherein the sidelink BSR is a sidelink non-padding BSR; or

The transmitting the sidelink BSR includes: sending the sidelink BSR under the condition that the filling bit number of a medium access control layer protocol data unit (MAC PDU) to be assembled is larger than or equal to the size of the sidelink BSR plus the MAC subhead of the sidelink BSR but smaller than the size of the sidelink target BSR plus the MAC subhead of the sidelink target BSR; wherein the sidelink BSR is a sidelink padding BSR;

the BSR format of the secondary link comprises a destination index domain and an LCG identification domain, and does not comprise a buffer size domain, wherein the destination index domain comprises a destination index, and the LCG identification domain comprises an LCG identification; or the sidelink BSR format comprises a buffer size domain, and does not comprise a destination index domain and an LCG identification domain, wherein the buffer size domain comprises a buffer size; the cache size corresponds to one of the following conditions: presetting the cache size of the LCG identifier; presetting the cache size of a destination index; presetting the cache size of LCG identification under the destination index;

the secondary link BSR format is identified through a MAC subheader format, the MAC subheader format comprises a reserved bit R domain and a Logical Channel Identifier (LCID) domain, wherein the value of the R domain is used for indicating the type of the secondary link BSR format, and the LCID contained in the LCID domain is reused by a Uu port LCID; or the LCID field comprises LCIDs which are newly defined and are used for indicating the type of the secondary link BSR format;

when the terminal device has multiple LCGs and/or multiple destinations and has sidelink cache data to be sent, the sidelink BSR carries an LCG identifier and a destination index, and the LCG identifier and the destination index carried by the sidelink BSR are the LCG identifier and the destination index corresponding to the logical channel with the highest priority among all the logical channels to which the sidelink cache data is to be sent.

2. The method of claim 1, wherein the sidelink BSR includes a sidelink padding BSR and/or a sidelink non-padding BSR.

3. The method of claim 1, wherein the terminal device has only one LCG and/or one destination with sidelink cache data to send.

4. A sidelink BSR receiving method, wherein the method is performed by a network device, and wherein the method comprises:

receiving a sidelink BSR; wherein, the secondary link BSR format is a fixed length, and the fixed length is 1 byte;

the sidelink BSR is sent by the terminal equipment under the condition that only one LCG and/or one destination has sidelink cache data to be sent, and the sidelink BSR is a sidelink non-padding BSR; alternatively, the first and second electrodes may be,

the sidelink BSR is sent by the terminal equipment under the condition that the filling bit number of the MAC PDU to be assembled is larger than or equal to the size of the sidelink BSR plus the MAC sub-head of the sidelink BSR but smaller than the size of the target BSR plus the MAC sub-head of the target BSR, and the sidelink BSR is a sidelink filling BSR;

the BSR format of the secondary link comprises a destination index domain and an LCG identification domain, and does not comprise a buffer size domain, wherein the destination index domain comprises a destination index, and the LCG identification domain comprises an LCG identification; or the sidelink BSR format comprises a buffer size domain not comprising a destination index domain and an LCG identification domain, and the buffer size domain comprises a buffer size; the cache size corresponds to one of the following conditions:

presetting the cache size of the LCG identifier; presetting the cache size of the destination index; presetting the cache size of LCG identification under the destination index;

wherein, after the receiving of the sidelink BSR, the method further comprises: identifying the sidelink BSR format through the MAC subheader format of the sidelink BSR; wherein the MAC subheader format comprises an R domain and an LCID domain;

wherein the identifying the sidelink BSR format via the MAC subheader format of the sidelink BSR comprises: identifying the format of the secondary link BSR through the value of the R domain, wherein LCID included in the LCID domain is reused by Uu LCID; or identifying the sidelink BSR format through LCID of the LCID domain, wherein the LCID is newly defined.

5. A terminal device, comprising:

a transmission module for transmitting a sidelink BSR; wherein, the secondary link BSR format is a fixed length, and the fixed length is 1 byte;

the transmitting the sidelink BSR includes: transmitting the sidelink BSR under the condition that only one LCG and/or one destination has sidelink cache data to be transmitted; wherein the sidelink BSR is a sidelink non-padding BSR; or

The transmitting a sidelink BSR includes: when the filling bit number of the MAC PDU to be assembled is larger than or equal to the size of the sub-link BSR plus the MAC sub-head of the sub-link BSR but smaller than the size of the sub-link target BSR plus the MAC sub-head of the sub-link target BSR, the sub-link BSR is sent; wherein the sidelink BSR is a sidelink padding BSR;

the secondary link BSR format comprises a destination index domain and an LCG identification domain, and does not comprise a cache size domain, wherein the destination index domain comprises a destination index, and the LCG identification domain comprises an LCG identification; or the sidelink BSR format comprises a buffer size domain, and does not comprise a destination index domain and an LCG identification domain, wherein the buffer size domain comprises a buffer size; the cache size corresponds to one of the following: presetting the cache size of the LCG identifier; presetting the cache size of the destination index; presetting the cache size of LCG identification under the destination index;

the secondary link BSR format is identified by a MAC subheader format, the MAC subheader format comprises a reserved bit R domain and a Logical Channel Identifier (LCID) domain, wherein the value of the R domain is used for indicating the type of the secondary link BSR format, and the LCID contained in the LCID domain is reused by a Uu port LCID; or LCID included in the LCID domain is newly defined, and the newly defined LCID is used for indicating the type of the secondary link BSR format;

6. A network device, comprising:

a receiving module for receiving a sidelink BSR; wherein the sidelink BSR format is a fixed length, and the fixed length is 1 byte;

the sidelink BSR is sent by the terminal equipment under the condition that only one LCG and/or one destination has sidelink cache data to be sent, and the sidelink BSR is a sidelink non-padding BSR; or alternatively

The secondary link BSR is sent by the terminal equipment under the condition that the filling bit number of the MAC PDU to be assembled is larger than or equal to the size of the MAC subhead of the secondary link BSR plus the secondary link BSR, but smaller than the size of the MAC subhead of the secondary link target BSR plus the secondary link target BSR, and the secondary link BSR is a secondary link filling BSR;

the BSR format of the secondary link comprises a destination index domain and an LCG identification domain, and does not comprise a buffer size domain, wherein the destination index domain comprises a destination index, and the LCG identification domain comprises an LCG identification; or the sidelink BSR format comprises a buffer size domain not comprising a destination index domain and an LCG identification domain, and the buffer size domain comprises a buffer size; the cache size corresponds to one of the following conditions: presetting the cache size of the LCG identifier; presetting the cache size of the destination index; presetting the cache size of LCG identification under the destination index;

wherein the receiving module is further configured to: identifying the sidelink BSR format through the MAC subheader format of the sidelink BSR; wherein the MAC subheader format comprises an R domain and an LCID domain;

7. A terminal device, comprising: memory, processor and computer program stored on the memory and executable on the processor, the computer program when executed by the processor implementing the steps of a sidelink BSR transmitting method as claimed in any one of claims 1 to 3.

8. A network device, comprising: memory, a processor and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the sidelink BSR receiving method as claimed in claim 4.

9. A computer-readable storage medium, characterized in that a computer program is stored thereon, which when executed by a processor, implements the steps of the sidelink BSR transmitting/receiving method as recited in any one of claims 1 to 4.