CN111107583A - sending method of sidelink retransmission request BSR and terminal equipment - Google Patents

sending method of sidelink retransmission request BSR and terminal equipment Download PDF

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Publication number
CN111107583A
CN111107583A CN201910229465.7A CN201910229465A CN111107583A CN 111107583 A CN111107583 A CN 111107583A CN 201910229465 A CN201910229465 A CN 201910229465A CN 111107583 A CN111107583 A CN 111107583A
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bsr
sidelink
retransmission request
priority
data
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CN111107583B (en
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鲍炜
杨晓东
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Vivo Mobile Communication Co Ltd
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Vivo Mobile Communication Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
    • H04W72/566—Allocation or scheduling criteria for wireless resources based on priority criteria of the information or information source or recipient
    • H04W72/569—Allocation or scheduling criteria for wireless resources based on priority criteria of the information or information source or recipient of the traffic information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/0278—Traffic management, e.g. flow control or congestion control using buffer status reports

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The embodiment of the invention discloses a sending method of a sidelink retransmission request BSR and a terminal device, which are used for solving the problem that the terminal device cannot determine how to send the sidelink retransmission request BSR and other data information on a Uu link, so that the communication effectiveness is influenced. The method comprises the following steps: determining the transmission priority of the sidelink retransmission request BSR and the target information; and sending the sidelink retransmission request BSR and the target information according to the sending priority. The embodiment of the invention can ensure that important data information (such as sidelink retransmission request BSR or target information) can be transmitted preferentially, ensure the reliability of a network equipment scheduling mode and improve the resource utilization rate and the communication system efficiency.

Description

sending method of sidelink retransmission request BSR and terminal equipment
Technical Field
The embodiment of the invention relates to the technical field of communication, in particular to a method for sending a Buffer Status Report (BSR) of a sidelink (sidelink or sidelink, sidelink and the like) retransmission request and a terminal device.
Background
sidelink transmissions are largely divided into broadcast, multicast and unicast. In the sidelink unicast and multicast scenario, the terminal device may adopt the resource scheduling Mode of Mode1, that is, the sending terminal device requests the sidelink resource from the network device for data transmission.
After the sending end terminal device sends data to the receiving end terminal device through the sidelink link, if the receiving end terminal device fails to receive the data, the sending end terminal device needs to retransmit the data on the sidelink link, and at this time, the sending end terminal device may send a sidelink retransmission request BSR to the network device to request for a sidelink resource required by the retransmitted data.
The sidelink retransmission request BSR is sent through the Uu link, however, other data information needs to be sent on the Uu link between the terminal device and the network device at the sending end. At present, how to send sidelink retransmission request BSR and other data information on Uu link is a technical problem to be solved urgently in the prior art.
Disclosure of Invention
The embodiment of the invention aims to provide a sending method of a sidelink retransmission request BSR and a terminal device, so as to solve the problem that the terminal device cannot determine how to send the sidelink retransmission request BSR and other data information on a Uu link, so that the communication effectiveness is influenced.
In a first aspect, a sidelink BSR transmission method is provided, where the method is performed by a terminal device, and the method includes:
determining the transmission priority of the sidelink retransmission request BSR and the target information;
and sending the sidelink retransmission request BSR and the target information according to the sending priority.
In a second aspect, a terminal device is provided, which includes:
the priority determining module may be configured to determine a transmission priority of the sidelink retransmission request BSR and the target information;
a sending module, configured to send the sidelink retransmission request BSR and the target information according to the sending priority.
In a third aspect, a terminal device is provided, the terminal device comprising a processor, a memory 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 method according to the first aspect.
In a fourth aspect, a computer-readable storage medium is provided, on which a computer program is stored, which computer program, when being executed by a processor, realizes the steps of the method according to the first aspect.
In the embodiment of the invention, the sending priorities of the sidelink retransmission request BSR and the target information are determined, and the sidelink retransmission request BSR and the target information are sent according to the determined sending priorities, so that the problem that how to send the sidelink retransmission request BSR and the target information cannot be determined by the terminal equipment is solved, and the communication effectiveness is improved.
Meanwhile, the embodiment of the invention can ensure that important data information (such as sidelink retransmission request BSR or target information) can be transmitted preferentially, ensure the reliability of a network equipment scheduling mode and improve the resource utilization rate and the communication system efficiency.
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 retransmission request BSR transmitting method according to an embodiment of the present invention;
fig. 2 is a schematic view of an application scenario of a sidelink retransmission request BSR sending method according to an embodiment of the present invention;
fig. 3 is a BSR format schematic diagram of sidelink retransmission request according to an embodiment of the present invention;
FIG. 4 is a BSR format diagram of sidelink data according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a terminal device according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a network device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the 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.
It should be understood that the technical solutions of the embodiments of the present invention can be applied to various communication systems, for example: a Long Term Evolution (LTE) sidelink system, a New Radio Access (New Radio Access) sidelink system, or a subsequent Evolution 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), a portable device (portable Equipment), a vehicle (vehicle), etc., 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 referred to as a "cellular" phone), a computer with a wireless communication function, and the Terminal device may also be a portable, pocket, handheld, computer-embedded, or vehicle-mounted Mobile apparatus.
In the embodiment of the present invention, the network device is a device deployed in a radio access network to provide a wireless communication function for a terminal device. 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 (3G) network, called a node B (node B), or a network device in a later Evolved communication system, etc., although the words are not limiting.
As shown in fig. 1, an embodiment of the present invention provides a sidelink retransmission request BSR sending method 100, which may be executed by a terminal device, and includes the following steps:
s102: and determining the transmission priority of the sidelink retransmission request BSR and the target information.
The sidelink retransmission request BSR mentioned in each embodiment of the present invention may be that, when sidelink data transmission of a sidelink link between terminal devices fails, a terminal device at a transmitting end requests a sidelink resource to a network device, where the sidelink resource is used for retransmitting the sidelink data.
The target information is mainly data information of a Uu link between the terminal device and the Network device, for example, the target information may be sidelink data BSR, data from an Uplink-Common Control Channel (UL-CCCH), Cell-Radio Network Temporary Identifier (C-RNTI) MAC CE, and the like.
The sending priorities of the sidelink retransmission request BSR and the target information determined in this step may specifically be: the transmission priority of the sidelink retransmission request BSR is higher than that of the target information; or the transmission priority of the sidelink retransmission request BSR is lower than that of the target information. How to determine the transmission priority of the two will be described in detail in the following embodiments.
It should be noted that, in the embodiment of the present invention, the BSR for requesting to retransmit the resource required by the sidelink data is referred to as a sidelink retransmission request BSR, and of course, other similar terms may be used to indicate the sidelink retransmission request BSR, for example, the sidelink retransmission BSR, the sidelink BSR, the BSR, and the like.
Similarly, the BSR requesting resources required for transmitting (initial transmission, i.e. no transmission failure), sidelink data is referred to as sidelink data BSR in the embodiments of the present invention, and other similar terms may be used to refer to the sidelink data BSR, for example, the sidelink BSR, and so on.
S104: and sending the sidelink retransmission request BSR and the target information according to the sending priority.
When this step is executed, for example:
when the target information is a sidelink data BSR, if the transmission priority of a sidelink retransmission request BSR is higher than that of the sidelink data BSR, preferentially transmitting the sidelink retransmission request BSR, and transmitting the sidelink data BSR in a subsequent transmission opportunity; or if the transmission priority of the sidelink data BSR is higher than that of the sidelink retransmission request BSR, preferentially transmitting the sidelink data BSR, and transmitting the sidelink retransmission request BSR in a subsequent transmission opportunity.
For example, if the target information is data from UL-CCCH or other information such as Uu interface padding BSR, if the transmission priority of the sidelink retransmission request BSR is higher than the transmission priority of the target information, the sidelink retransmission request BSR is preferentially transmitted and the target information is transmitted in the subsequent transmission opportunity; or if the transmission priority of the target information is higher than that of the sidelink retransmission request BSR, the target information is preferentially transmitted, and the sidelink retransmission request BSR is transmitted in the subsequent transmission opportunity.
The above example lists the case that the total amount of transmission resources required for the sidelink retransmission request BSR and the target information exceeds the remaining transmission resources of the current TTI, and of course, if the total amount of transmission resources required for the sidelink retransmission request BSR and the target information is less than the remaining transmission resources of the current TTI, the MAC protocol data unit PDU assembly may be performed according to the above transmission priorities from top to bottom, and then the MAC PDUs are transmitted, that is, the sidelink retransmission request BSR and the target information are transmitted simultaneously in one transmission opportunity.
The sending method for the sidelink retransmission request BSR determines the sending priority of the sidelink retransmission request BSR and the target information, and sends the sidelink retransmission request BSR and the target information according to the determined sending priority, so that the problem that how to send the sidelink retransmission request BSR and the target information cannot be determined by the terminal equipment is solved, and the communication effectiveness is improved.
Meanwhile, the embodiment of the invention can ensure that important information (such as sidelink retransmission request BSR or target information) can be transmitted preferentially, ensure the reliability of a network equipment scheduling mode and improve the resource utilization rate and the communication system efficiency.
Optionally, it is mentioned that the target information may be sidelink data BSR in the above method embodiment 100, and the method embodiment 100 will be described in additional detail in several detailed embodiments below.
The determination of the transmission priority of the sidelink retransmission request BSR and the target information (i.e., sidelink data BSR) mentioned in S102 includes:
1) and determining the transmission priority of the sidelink retransmission request BSR and the sidelink data BSR according to the priority of the logic channel corresponding to the sidelink retransmission request BSR and the priority of the logic channel corresponding to the sidelink data BSR.
Specifically, for example, if the priority of the logical channel corresponding to the sidelink retransmission request BSR is higher than the priority of the logical channel corresponding to the sidelink data BSR, it is determined that the transmission priority of the sidelink retransmission request BSR is higher than the transmission priority of the sidelink data BSR; or, if the priority of the logical channel corresponding to the sidelink retransmission request BSR is lower than the priority of the logical channel corresponding to the sidelink data BSR, determining that the transmission priority of the sidelink retransmission request BSR is lower than the transmission priority of the sidelink data BSR. Or
2) And determining the transmission priority of the sidelink retransmission request BSR and the sidelink data BSR according to the priority of the logic channel group corresponding to the sidelink retransmission request BSR and the priority of the logic channel group corresponding to the sidelink data BSR.
In general, a logical channel group includes a plurality of logical channels, and the priority of the logical channel group mentioned in this step may be the priority of the logical channel with the highest priority among all the logical channels included in the logical channel group.
Further optionally, in S102, if the priority of the logical channel corresponding to the sidelink retransmission request BSR is equal to the priority of the logical channel corresponding to the sidelink data BSR, it is determined that the transmission priority of the sidelink retransmission request BSR is higher than the transmission priority of the sidelink data BSR; or
And if the priority of the logical channel group corresponding to the sidelink retransmission request BSR is equal to the priority of the logical channel group corresponding to the sidelink data BSR, determining that the transmission priority of the sidelink retransmission request BSR is higher than that of the sidelink data BSR.
The implementation mode can ensure the prior transmission of the sidelink retransmission request BSR, further ensure the timely transmission of the sidelink retransmission data and improve the communication efficiency of the sidelink.
Further optionally, in S102, if the sidelink resource requested by the sidelink retransmission request BSR is used for retransmitting a MAC protocol data unit PDU, where the MAC PDU includes a MAC control element CE, it is determined that the transmission priority of the sidelink retransmission request BSR is higher than the transmission priority of the sidelink data BSR.
Of course, in other embodiments, the relative priority between the MAC CE in the sidelink link and the typical sidelink data may be further given, so that S102 may determine the transmission priority of the sidelink retransmission request BSR and the sidelink data BSR according to the relative priority between the MAC CE in the sidelink link and the typical sidelink data.
The above several embodiments describe how to determine the transmission priority of the sidelink retransmission request BSR and the sidelink data BSR. If the transmission priority of the sidelink retransmission request BSR is higher than that of the sidelink data BSR, preferentially transmitting the sidelink retransmission request BSR, and transmitting the sidelink data retransmission request in a subsequent transmission opportunity; or if the transmission priority of the sidelink data BSR is higher than that of the sidelink retransmission request BSR, preferentially transmitting the sidelink data BSR, and transmitting the sidelink data BSR in a subsequent transmission opportunity.
Optionally, in the several embodiments, before transmitting the sidelink retransmission request BSR and the sidelink data BSR according to the transmission priority, the following steps may be further included:
and if the total amount of the transmission resources required by the sidelink retransmission request BSR and the sidelink data BSR exceeds the residual transmission resources of the current transmission time interval TTI, truncating the BSR to be truncated in the sidelink retransmission request BSR and the sidelink data BSR according to the transmission priority of the sidelink retransmission request BSR, the transmission priority of the sidelink data BSR and the residual transmission resources.
In this embodiment, the BSR to be truncated may specifically be a sidelink data BSR; or sidelink retransmission request BSR; or sidelink data BSR and idelink retransmission request BSR.
Specifically, for example, the sending priority of the sidelink retransmission request BSR is higher than that of the sidelink data BSR, and the remaining transmission resources of the current TTI are not enough to transmit all the sidelink data BSRs, the sidelink data BSRs may be truncated, and finally, the sidelink retransmission request BSR and the sidelink data BSRs after truncation are preferentially sent, and the remaining part of the sidelink data BSRs is transmitted in the subsequent transmission opportunity.
For another example, the sending priority of the sidelink data BSR is higher than that of the sidelink retransmission request BSR, and the remaining transmission resources of the current TTI are not enough to transmit all the sidelink retransmission request BSRs, a truncation process may be performed on the sidelink retransmission request BSR, and finally the sidelink data BSR and the sidelink retransmission request BSR after the truncation process are preferentially sent, and the remaining part of the sidelink retransmission request BSR is transmitted in a subsequent transmission opportunity.
For another example, the remaining transmission resources of the current TTI are insufficient to transmit the sidelink retransmission request BSR and the sidelink data BSR, where the sidelink data BSR includes at least one entry, e.g., entry 1 and entry 2; the sidelink retransmission request BSR also includes at least one entry, e.g., entry 3 and entry 4, and this embodiment may be based on the transmission priorities of all entries included by the sidelink data BSR and the sidelink retransmission request BSR:
truncating the sidelink data BSR and the sidelink retransmission request BSR (for example, the priority of each entry may be entry 3, entry 1, entry 4 and entry 2 from top to bottom); alternatively, the first and second electrodes may be,
truncating the sidelink data BSR (for example, the priority of each entry can be entry 3, entry 4, entry 1 and entry 2 from top to bottom); alternatively, the first and second electrodes may be,
truncation processing is performed on the sidelink retransmission request BSR (for example, the priority of each entry may be entry 1, entry 2, entry 3, and entry 4 from top to bottom).
After the foregoing truncation processing, the embodiment, sending the sidelink retransmission request BSR and the sidelink data BSR according to the sending priority, includes:
preferentially sending the sidelink retransmission request BSR after truncation and the sidelink data BSR after truncation, wherein the BSR to be truncated comprises the sidelink retransmission request BSR and the sidelink data BSR; or
Preferentially sending the sidelink retransmission request BSR and the sidelink data BSR after truncation processing, wherein the BSR to be truncated comprises the sidelink data BSR; or
And preferentially sending the sidelink data BSR and the sidelink retransmission request BSR after truncation processing, wherein the BSR to be truncated comprises the sidelink retransmission request BSR.
In the foregoing embodiments, the MAC subheader (subheader) corresponding to the truncated sidelink retransmission request BSR may further include indication information, where the indication information is used to indicate that the format of the truncated sidelink retransmission request BSR is the truncated BSR format.
In the above embodiment of the present invention, truncation processing is performed on the sidelink retransmission request BSR or the sidelink data BSR, and when the truncation processing is performed, one or more entries with high priorities may be reserved according to priorities of multiple entries included in the sidelink retransmission request BSR or the sidelink data BSR, so that it can be ensured that the entries with high priorities can be preferentially sent, and the network device schedules sidelink resources in time. Meanwhile, the embodiment can make full use of the transmission resources in the transmission opportunity, avoid causing transmission resource waste and improve the communication efficiency.
The above embodiments are all described with the target information being sidelink data BSR, it is mentioned above that the target information may also be other information such as data from UL-CCCH, Uu interface padding BSR, etc., and the method embodiment 100 is described below with the target information or data from UL-CCCH, Uu interface padding BSR, etc.
The determining the transmission priority of the sidelink retransmission request BSR and the target information mentioned in S102 includes:
if the target information is first-type information, the transmission priority of the target information is higher than that of the sidelink retransmission request BSR; or
If the target information is second-type information, the transmission priority of the target information is lower than that of the sidelink retransmission request BSR;
wherein, the first type information comprises at least one of the following:
C-RNTI MAC CE；
data from the UL-CCCH;
reporting the data volume and the power margin to the MAC CE;
configured authorization validation MAC CE;
semi-persistent scheduling (SPS) confirming the MAC CE;
automatically confirming the MAC CE in an uplink manner;
filling Uu interfaces except the BSR with BSR MAC CE; and
a power headroom MAC CE, an extended power headroom MAC CE, a dual connection power headroom MAC CE, a single-inlet power headroom MAC CE, or a multi-inlet power headroom MAC CE;
the second type of information includes at least one of:
data from a target logical channel, the data from the target logical channel excluding data from the UL-CCCH;
recommending a bit rate to query the MAC CE;
the Uu interface is filled with BSR MAC CE;
the Uu interface fills the BSR; and
sidelink fills the BSR.
Optionally, before the S104 transmits the sidelink retransmission request BSR and the target information according to the transmission priority, the following steps may be further included:
and if the total amount of the transmission resources required by the sidelink retransmission request BSR and the target information exceeds the residual transmission resources of the current TTI, and the transmission priority of the target information is higher than the transmission priority of the sidelink retransmission request BSR, truncating the sidelink retransmission request BSR according to the current residual transmission resources.
Thus, transmitting the sidelink retransmission request BSR and the target information according to the transmission priority includes: and preferentially sending the target information and the sidelink retransmission request BSR after truncation processing, and transmitting the rest part of the sidelink retransmission request BSR in the subsequent transmission opportunity.
It can be understood that, in this embodiment, if the transmission priority of the target information is lower than the transmission priority of the sidelink retransmission request BSR, the target information is truncated according to the remaining transmission resources, the sidelink retransmission request BSR and the target information after truncation are preferentially transmitted, and the remaining part of the target information is transmitted in a subsequent transmission opportunity.
In this embodiment, truncation processing is performed on the sidelink retransmission request BSR, and when the truncation processing is performed, one or more entries with high priorities may be reserved according to the priorities of multiple entries included in the sidelink retransmission request BSR, so that it can be ensured that the entries with high priorities can be preferentially sent, and the network device schedules sidelink resources in time. Meanwhile, the embodiment can make full use of the transmission resources in the transmission opportunity, avoid causing transmission resource waste and improve the communication efficiency.
To describe in detail the sidelink BSR transmission method according to the above embodiments of the present invention, the following description will be made with reference to several specific embodiments.
Example one
Referring to fig. 2, fig. 2 is a typical scenario of BSR reporting, where a V2X service is transmitted between terminal device 1 and terminal device 2 through a sidelink link, and terminal device 1 and terminal device 2 use a resource scheduling Mode of Mode1, that is, terminal device 1 requests sidelink resources from a network device for sidelink data transmission.
After the terminal device 1 sends sidelink data to the terminal device 2, if the terminal device 2sidelink data fails to receive, the terminal device 1 needs to retransmit the sidelink data on a sidelink link, and the retransmitted sidelink data also needs to request sidelink resources from the network device, where the request for the sidelink resources may use a sidelink retransmission request BSR, and the request from the terminal device 1 to the network device (including the above-mentioned sidelink retransmission request BSR) is sent through a Uu link.
Since the terminal device 1 may have another requirement for Uu transmission on the Uu link at the same time, when the total amount of the uplink data information transmitted to the network device by the terminal device 1 is greater than the transmission resource of the currently allocated Uu link, the terminal device may determine the transmission priority of the sidelink retransmission request BSR and the target information; and sending the sidelink retransmission request BSR and the target information according to the sending priority. Generally, data information with higher priority is transmitted first, and data with lower priority waits for a subsequent transmission opportunity and then is transmitted according to the priority order or other transmission rules.
The target information in the first embodiment may be data from UL-CCCH, Uu interface padding BSR and other information, and the second embodiment and the third embodiment will describe the case where the target information is sidelink data BSR.
Specifically, for example, when the MAC CE for configuring the authorization acknowledgement and the sidelink retransmission request BSR need to be transmitted between the terminal device 1 and the network devices, and the transmission resource of the current TTI is insufficient, it is first determined that the transmission priority of the MACCE for configuring the authorization acknowledgement is higher than the transmission priority of the sidelink retransmission request BSR, the MACCE for configuring the authorization acknowledgement is preferentially transmitted, and the sidelink retransmission request BSR is transmitted at a subsequent transmission opportunity.
For another example, when sidelink retransmission request BSR and Dedicated Traffic Channel (DTCH) data need to be transmitted between the terminal device 1 and the network devices, and the transmission resource of the current TTI is insufficient, it is first determined that the transmission priority of the sidelink retransmission request BSR is higher than that of the DTCH data, the sidelink retransmission request BSR and a part of the DTCH data that can be accommodated are preferentially transmitted, and the remaining part of the DTCH is transmitted in a subsequent transmission opportunity.
Generally, the priority order in the uplink MAC PDU is strictly specified by the standard, in order to standardize the behaviors of all terminal devices and ensure that important data information can be transmitted first, the present invention introduces the transmission priorities of the sidelink retransmission request BSR and other typical data information in the foregoing embodiments, and certainly, a new data type does not exclude the occurrence of a new data type in the subsequent standardization, and the priority order of the new data type and the sidelink retransmission request BSR may also be predefined.
Optionally, when determining the transmission priorities of the sidelink retransmission request BSR and the target information, and sorting the transmission priorities from high to low, if the remaining transmission resources can accommodate part of the sidelink retransmission request BSR but cannot accommodate all of the sidelink retransmission request BSRs, the embodiment truncates the sidelink retransmission request BSR to ensure that the content part of the important sidelink retransmission request BSR can reach the network device as soon as possible, and the network device schedules the sidelink retransmission as soon as possible.
Generally, the priority level inside the sidelink BSR is mainly determined by the priority level of the highest-priority logical channel included in the logical channel group corresponding to each child sidelink BSR. For example, for the first child sidelink retransmission request BSR, its logical channel priorities are 1 and 2; in the second sub-sidelink retransmission request BSR, the priorities of the logical channels are 2 and 3, and if the number is smaller and the priority is higher, the first sub-sidelink retransmission request BSR is preferentially transmitted under the condition that the transmission resource is insufficient, and the second sub-sidelink retransmission request BSR delays to transmit again until the next transmission resource exists.
Generally, one sub-sidelink retransmission request BSR corresponds to one target transmission process, and is determined by the destination index and the HARQ process ID.
The child sidelink retransmission request BSR may contain the transport block size of the requested retransmission. If the network device can record the size of the transmission resource scheduled by the destination index + HARQ process identifier last time, the sub sidelink retransmission request BSR may not carry the size of the transmission block requested for retransmission, otherwise, the size of the transmission block requested for retransmission needs to be accurately carried, for example, the size is accurate to 1 byte, so as to ensure the retransmission efficiency.
In a specific example, the format of sidelink retransmission request BSR MAC CE is shown in fig. 3, where the destination index is used to identify the receiving-end terminal device, and the transmitting-end terminal device in fig. 3 establishes sidelink transmission with more than one terminal device, and different receiving-end terminal devices are distinguished by different destination indexes, for example, destination index 1 and destination index 2 in fig. 3.
The HARQ process identifier in fig. 3 carries HARQ process information between a pair of terminal devices, for example, HARQ process information between terminal device 1 and terminal device 2. Generally, there are 8 HARQ processes, 8 bits corresponding to 8 HARQ processes one to one. When the bit corresponding to the HARQ process is 0, the HARQ process does not need sidelink retransmission; when the bit corresponding to the HARQ process is 1, it means that the HARQ process needs to perform sidelink retransmission, so that the terminal device can carry sidelink retransmission request BSRs of multiple HARQ processes at a time.
The transport block size in fig. 3 identifies the size of the MAC transport block that needs to be retransmitted. In a preferred embodiment, the network device may record the size of the sidelink resource scheduled each time, so that after the terminal device reports the destination index and the HARQ process identifier, the network device may correspondingly schedule the size of the retransmitted sidelink resource according to the size of the sidelink resource scheduled initially. In this embodiment, the network device can know the number of transport blocks of each child sidelink retransmission request BSR according to the HARQ process bit map without additionally indicating the number of transport blocks of each child sidelink retransmission request BSR.
In this embodiment, if the terminal device truncates the sidelink retransmission request BSR, it needs to consider the highest priority data in the data block corresponding to each group of destination index + HARQ process identifier, sort the data according to the priority, and preferentially perform transmission of the high-priority child sidelink retransmission request BSR. For example, in fig. 3, if the priority of the data block corresponding to the destination index 1+ HARQ process identifier 1 is higher than the priority of the data block corresponding to the destination index 2+ HARQ process identifier 2, the sub sidelink retransmission request BSR corresponding to the destination index 1+ HARQ process identifier 1 is preferentially transmitted.
Example two
When the transmission resources received by the MAC layer of the terminal device on the Uu interface are not enough to accommodate all sidelink data BSRs and sidelink retransmission request BSRs, priority processing is also required to be performed on the sidelink data BSRs and the sidelink retransmission request BSRs, and the BSR format is truncated if necessary, so as to ensure that high-priority content is transmitted preferentially.
The format of sidelink data BSR is shown in fig. 4:
the destination index is used to indicate the receiving end terminal device, and the transmitting end terminal device in fig. 4 not only establishes sidelink transmission with one terminal device, but different terminal devices are distinguished by different destination indexes, such as destination index 1 and destination index 2 in fig. 4.
The LCG ID identifies different logical channel groups, and a logical channel group may include a plurality of logical channels, and each logical channel generally has a corresponding scheduling priority.
The buffer size is used to indicate the amount of sidelink data requested for transmission.
Optionally, in the sidelink retransmission request BSR shown in fig. 3, which data is transmitted in a transmission block corresponding to each destination index + HARQ process identifier, where the scheduling priority of each data and the like may be acquired by the terminal device in advance.
Under special conditions, if the resource requested by the sidelink retransmission request BSR is used for retransmitting the MAC PDU, the MAC PDU includes the MAC CE, and the priority of the general MAC CE is higher than that of the data. Of course, in other embodiments, the relative priority between the MAC CE in the sidelink link and the typical sidelink data may be further given, so that the embodiment may determine the transmission priority of the sidelink retransmission request BSR and the sidelink data BSR according to the relative priority between the MAC CE in the sidelink link and the typical sidelink data.
In this embodiment, if the total amount of transmission resources required by the sidelink retransmission request BSR and the sidelink data BSR exceeds the remaining transmission resources of the current TTI, the BSRs and the BSRs are preferentially transmitted according to the highest priority corresponding to each destination index + HARQ process identifier and the destination index + logical channel group identifier.
Examples are as follows:
the sidelink data BSR includes an entry (i.e., child sidelink data BSR)1 and an entry 2, and the sidelink retransmission request BSR includes an entry (i.e., child sidelink retransmission request BSR)3 and an entry 4.
Item 1: the priority of the logical channel contained in the destination index 1+ logical channel group identifier 1 is 2 and 3, and the highest priority corresponding to the entry 1 is 2;
item 2: the priority of the logical channel contained in the destination index 2+ logical channel group identifier 2 is 2 and 3, and the highest priority corresponding to the entry 2 is 3;
item 3: the priority of the logical channel contained in the destination index 1+ HARQ process identifier 1 is 3 and the MAC CE, and if the MAC CE is set to have the highest priority, the highest priority corresponding to the entry 3 is 0;
entry 4: if the priority of the logical channel contained in the destination index 2+ HARQ process identifier 2 is 4, the highest priority corresponding to the entry 4 is 4;
then, according to the priority of each entry, the transmission priority order of the sidelink retransmission request BSR and the sidelink data BSR is determined as follows: entry 3> entry 1> entry 2> entry 4. This embodiment can perform the packing and transmission in the priority order described above, and the portion that cannot be accommodated is transmitted next time.
In particular, entry 3 may transmit first because entry 3 has the highest priority, and entries 3 and 4 may be transmitted together if entries 3 and 4 may be transmitted jointly without adding additional overhead. For example, in the format of sidelink retransmission request BSR in fig. 3, if the transport block size field is not carried, and the destination indexes of entries 3 and 4 are the same, that is, the destination index 3 and the destination index 4 are the same, thus, different HARQ process identifiers can be implemented by using positions 1 of different positions in the same bitmap, and thus, the entry 4 can also be transmitted along with the entry 3, at this time, the determination criteria of the transmission priorities of the sidelink retransmission request BSR and the sidelink data BSR are: and comparing the data with the highest priority in all the HARQ processes corresponding to the same destination identifier with the priorities of other entries.
For the format of the BSR after the puncturing process, the content of the part which cannot be transmitted with low priority can be discarded according to the original BSR format. For example, the sidelink data BSR before truncation includes four entries, and only two of the entries can be reported according to the priority principle, so that the BSR format formed by the two entries is called a truncated BSR format. The format of the truncated BSR containing two entries may be the same as that of the original conventional BSR initially containing only two entries, except that the MAC subheader includes indication information for informing the network device whether the current reporting is the full sidelink BSR or only reports partial content due to insufficient transmission resources.
EXAMPLE III
When the transmission resources received by the MAC layer of the terminal device on the Uu interface are not enough to accommodate all sidelink data BSRs and sidelink retransmission request BSRs, priority processing is also required to be performed on the sidelink data BSRs and the sidelink retransmission request BSRs, and the BSR format is truncated if necessary, so as to ensure that high-priority content is transmitted preferentially.
Optionally, if the highest priority of entries of the sidelink data BSR and the sidelink retransmission request BSR is the same, the transmission of the sidelink retransmission request BSR may be preferentially performed, which is convenient to ensure that the retransmission data can be processed in time, and reduce the time delay.
Examples are as follows:
the sidelink data BSR includes the following entry 1 and entry 2, and the sidelink retransmission request BSR includes the following entry 3.
Item 1: the priority of the logical channel contained in the destination index 1+ logical channel group identifier 1 is 2 and 3, and the highest priority corresponding to the entry 1 is 2;
item 2: the priority of the logical channel contained in the destination index 2+ logical channel group identifier 2 is 3 and 4, and the highest priority corresponding to the entry 2 is 3;
item 3: if the priority of the logical channel included in the destination index 1+ HARQ process identifier 1 is 2, the highest priority corresponding to the entry 3 is 2.
Then, according to the priority of each entry, the transmission priority order of the sidelink retransmission request BSR and the sidelink data BSR is determined as follows: item 3> item 1> item 2, this embodiment can perform packing and transfer in the above priority order, and the portion that cannot be accommodated is next transferred.
The sidelink retransmission request BSR transmission method according to the embodiment of the present invention is described in detail above with reference to fig. 1 to 4. A terminal device according to an embodiment of the present invention will be described in detail below with reference to fig. 5.
Fig. 5 is a schematic structural diagram of a terminal device according to an embodiment of the present invention. As shown in fig. 5, the terminal device 500 includes:
a priority determining module 502, configured to determine a transmission priority of the sidelink retransmission request BSR and the target information;
a sending module 504, configured to send the sidelink retransmission request BSR and the target information according to the sending priority.
The terminal device provided by the embodiment of the invention determines the sending priorities of the sidelink retransmission request BSR and the target information, and sends the sidelink retransmission request BSR and the target information according to the determined sending priorities, thereby solving the problem that the terminal device cannot determine how to send the sidelink retransmission request BSR and the target information, and improving the communication effectiveness.
Meanwhile, the embodiment of the invention can ensure that important information (such as sidelink retransmission request BSR or target information) can be transmitted preferentially, ensure the reliability of a network equipment scheduling mode and improve the resource utilization rate and the communication system efficiency.
Optionally, as an embodiment, the target information includes a sidelink data BSR, and the determining, by the priority determining module 502, the sending priorities of the sidelink retransmission request BSR and the target information includes:
determining the sending priority of the sidelink retransmission request BSR and the sidelink data BSR according to the priority of the logic channel corresponding to the sidelink retransmission request BSR and the priority of the logic channel corresponding to the sidelink data BSR; or
And determining the sending priorities of the sidelink retransmission request BSR and the sidelink data BSR according to the priority of the logic channel group corresponding to the sidelink retransmission request BSR and the priority of the logic channel group corresponding to the sidelink data BSR.
Optionally, as an embodiment, the target information includes a sidelink data BSR, and the determining, by the priority determining module 502, the sending priorities of the sidelink retransmission request BSR and the target information includes:
if the priority of the logical channel corresponding to the sidelink retransmission request BSR is equal to the priority of the logical channel corresponding to the sidelink data BSR, determining that the sending priority of the sidelink retransmission request BSR is higher than the sending priority of the sidelink data BSR; or
And if the priority of the logical channel group corresponding to the sidelink retransmission request BSR is equal to the priority of the logical channel group corresponding to the sidelink data BSR, determining that the transmission priority of the sidelink retransmission request BSR is higher than that of the sidelink data BSR.
Optionally, as an embodiment, the target information includes a sidelink data BSR, and the determining, by the priority determining module 502, the sending priorities of the sidelink retransmission request BSR and the target information includes:
and if the resource requested by the sidelink retransmission request BSR is used for retransmitting the MAC protocol data unit PDU, and the MAC PDU comprises the MAC control unit CE, determining that the transmission priority of the sidelink retransmission request BSR is higher than that of the sidelink data BSR.
Optionally, as an embodiment, the target information includes a sidelink data BSR, and the sending module 504 sends the sidelink retransmission request BSR and the target information according to the sending priority includes:
if the transmission priority of the sidelink retransmission request BSR is higher than that of the sidelink data BSR, preferentially transmitting the sidelink retransmission request BSR; or
And if the transmission priority of the sidelink data BSR is higher than that of the sidelink retransmission request BSR, preferentially transmitting the sidelink data BSR.
Optionally, as an embodiment, the terminal device 500 further includes a processing module (not shown), which may be used for
And if the total amount of the transmission resources required by the sidelink retransmission request BSR and the sidelink data BSR exceeds the residual transmission resources of the current transmission time interval TTI, truncating the BSR to be truncated in the sidelink retransmission request BSR and the sidelink data BSR according to the transmission priority of the sidelink retransmission request BSR, the transmission priority of the sidelink data BSR and the residual transmission resources.
Optionally, as an embodiment, the target information includes a sidelink data BSR, and the sending module 504 sends the sidelink retransmission request BSR and the target information according to the sending priority includes:
preferentially sending the sidelink retransmission request BSR after truncation and the sidelink data BSR after truncation, wherein the BSR to be truncated comprises the sidelink retransmission request BSR and the sidelink data BSR; or
Preferentially sending the sidelink retransmission request BSR and the sidelink data BSR after truncation processing, wherein the BSR to be truncated comprises the sidelink data BSR; or
And preferentially sending the sidelink data BSR and the sidelink retransmission request BSR after truncation processing, wherein the BSR to be truncated comprises the sidelink retransmission request BSR.
Optionally, as an embodiment, the MAC subheader corresponding to the sidelink retransmission request BSR after the truncation is performed includes indication information, where the indication information is used to indicate that the format of the sidelink retransmission request BSR after the truncation is the truncated BSR format.
Optionally, as an embodiment, the determining, by the priority determining module 502, the sending priorities of the sidelink retransmission request BSR and the target information includes:
if the target information is first-type information, the transmission priority of the target information is higher than that of the sidelink retransmission request BSR; or
If the target information is second-type information, the transmission priority of the target information is lower than that of the sidelink retransmission request BSR;
wherein the first type of information comprises at least one of:
a cell radio network temporary identity C-RNTI MAC CE;
data from an uplink common control channel, UL-CCCH;
reporting the data volume and the power margin to the MAC CE;
configured authorization validation MAC CE;
semi-persistent scheduling (SPS) confirming the MAC CE;
automatically confirming the MAC CE in an uplink manner;
filling Uu interfaces except the BSR with BSR MAC CE; and
a power headroom MAC CE, an extended power headroom MAC CE, a dual connection power headroom MAC CE, a single-inlet power headroom MAC CE, or a multi-inlet power headroom MAC CE;
the second type of information includes at least one of:
data from a target logical channel, the data from the target logical channel excluding data from the UL-CCCH;
recommending a bit rate to query the MAC CE;
the Uu interface is filled with BSR MAC CE;
the Uu interface fills the BSR; and
sidelink fills the BSR.
Optionally, as an embodiment, the terminal device 500 further includes a processing module (not shown), which may be used for
And if the total amount of transmission resources required by the sidelink retransmission request BSR and the target information exceeds the residual transmission resources of the current TTI, and the sending priority of the target information is higher than the sending priority of the sidelink retransmission request BSR, truncating the sidelink retransmission request BSR according to the residual transmission resources.
Optionally, as an embodiment, the target information includes a sidelink data BSR, and the sending module 504 sends the sidelink retransmission request BSR and the target information according to the sending priority includes:
and preferentially sending the target information and the sidelink retransmission request BSR after truncation processing.
The terminal device 500 according to the embodiment of the present invention may refer to the flow 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 500 are respectively for implementing the corresponding flow in the method 100 and achieving the same or equivalent technical effects, and for brevity, no further description is provided herein.
Fig. 6 is a block diagram of a terminal device of another embodiment of the present invention. The terminal device 600 shown in fig. 6 includes: at least one processor 601, memory 602, at least one network interface 604, and a user interface 603. The various components in the terminal device 600 are coupled together by a bus system 605. It is understood that the bus system 605 is used to enable communications among the components. The bus system 605 includes a power bus, a control bus, and a status signal bus in addition to a data bus. For clarity of illustration, however, the various buses are labeled as bus system 605 in fig. 6.
The user interface 603 may include, among other things, a display, a keyboard, a pointing device (e.g., a mouse, trackball), a touch pad, or a touch screen.
It will be appreciated that the memory 602 in embodiments of the 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 example, but 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 SDRAM ), Enhanced Synchronous SDRAM (ESDRAM), Synchlink DRAM (SLDRAM), and direct memory bus RAM (DRRAM). The memory 602 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 602 stores the following elements, executable modules or data structures, or a subset thereof, or an expanded set thereof: an operating system 6021 and application programs 6022.
The operating system 6021 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 program 6022 includes various application programs such as a Media Player (Media Player), a Browser (Browser), and the like, and is used to implement various application services. A program implementing the method of an embodiment of the invention can be included in the application program 6022.
In this embodiment of the present invention, the terminal device 600 further includes: a computer program stored 602 on the memory and executable on the processor 601, the computer program when executed by the processor 601 implementing the steps of the method 100 as follows.
The method disclosed by the above-mentioned embodiment of the present invention can be applied to the processor 601, or implemented by the processor 601. The processor 601 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 601. The Processor 601 may be a general-purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf 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 602, and the processor 601 reads the information in the memory 602 and performs the steps of the above method in combination with the hardware thereof. In particular, the computer-readable storage medium has stored thereon a computer program, which when executed by the processor 601, 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 disclosure may be implemented with modules (e.g., procedures, functions, and so on) that perform the functions described in this disclosure. 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.
The terminal device 600 can implement each process implemented by the terminal device in the foregoing embodiments, and can achieve the same or equivalent technical effects, and is not described here again to avoid repetition.
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 method embodiment 100, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here. 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 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 (14)

1. A method for sending a sidelink retransmission request Buffer Status Report (BSR), the method is executed by a terminal device, and the method comprises the following steps:
determining the transmission priority of the sidelink retransmission request BSR and the target information;
and sending the sidelink retransmission request BSR and the target information according to the sending priority.
2. The method of claim 1, wherein the target information comprises a sidelink data BSR, and wherein the determining the transmission priority of the sidelink retransmission request BSR and the target information comprises:
determining the sending priority of the sidelink retransmission request BSR and the sidelink data BSR according to the priority of the logic channel corresponding to the sidelink retransmission request BSR and the priority of the logic channel corresponding to the sidelink data BSR; or
And determining the sending priorities of the sidelink retransmission request BSR and the sidelink data BSR according to the priority of the logic channel group corresponding to the sidelink retransmission request BSR and the priority of the logic channel group corresponding to the sidelink data BSR.
3. The method of claim 1, wherein the target information comprises a sidelink data BSR, and wherein the determining the transmission priority of the sidelink retransmission request BSR and the target information comprises:
if the priority of the logical channel corresponding to the sidelink retransmission request BSR is equal to the priority of the logical channel corresponding to the sidelink data BSR, determining that the sending priority of the sidelink retransmission request BSR is higher than the sending priority of the sidelink data BSR; or
And if the priority of the logical channel group corresponding to the sidelink retransmission request BSR is equal to the priority of the logical channel group corresponding to the sidelink data BSR, determining that the transmission priority of the sidelink retransmission request BSR is higher than that of the sidelink data BSR.
4. The method of claim 1, wherein the target information comprises a sidelink data BSR, and wherein the determining the transmission priority of the sidelink retransmission request BSR and the target information comprises:
and if the resources requested by the sidelink retransmission request BSR are used for retransmitting the MAC Protocol Data Unit (PDU), and the MAC PDU comprises a MAC control unit (CE), determining that the transmission priority of the sidelink retransmission request BSR is higher than that of the sidelink data BSR.
5. The method according to any of claims 2 to 4, wherein the transmitting the sidelink retransmission request BSR and the sidelink data BSR according to the transmission priority comprises:
if the transmission priority of the sidelink retransmission request BSR is higher than that of the sidelink data BSR, preferentially transmitting the sidelink retransmission request BSR; or
And if the transmission priority of the sidelink data BSR is higher than that of the sidelink retransmission request BSR, preferentially transmitting the sidelink data BSR.
6. The method according to any of claims 2 to 4, wherein before the transmitting the sidelink retransmission request BSR and the sidelink data BSR according to the transmission priority, the method further comprises:
and if the total amount of the transmission resources required by the sidelink retransmission request BSR and the sidelink data BSR exceeds the residual transmission resources of the current transmission time interval TTI, truncating the BSR to be truncated in the sidelink retransmission request BSR and the sidelink data BSR according to the transmission priority of the sidelink retransmission request BSR, the transmission priority of the sidelink data BSR and the residual transmission resources.
7. The method of claim 6, wherein transmitting the sidelink retransmission request BSR and the sidelink data BSR according to the transmission priority comprises:
preferentially sending the sidelink retransmission request BSR after truncation and the sidelink data BSR after truncation, wherein the BSR to be truncated comprises the sidelink retransmission request BSR and the sidelink data BSR; or
Preferentially sending the sidelink retransmission request BSR and the sidelink data BSR after truncation processing, wherein the BSR to be truncated comprises the sidelink data BSR; or
And preferentially sending the sidelink data BSR and the sidelink retransmission request BSR after truncation processing, wherein the BSR to be truncated comprises the sidelink retransmission request BSR.
8. The method of claim 7,
the MAC subheader corresponding to the sidelink retransmission request BSR after the truncation processing includes indication information, where the indication information is used to indicate that the format of the sidelink retransmission request BSR after the truncation processing is the truncated BSR format.
9. The method of claim 1, wherein the determining the transmission priority of sidelink retransmission request BSR and target information comprises:
if the target information is first-type information, the transmission priority of the target information is higher than that of the sidelink retransmission request BSR; or
If the target information is second-type information, the transmission priority of the target information is lower than that of the sidelink retransmission request BSR;
wherein the first type of information comprises at least one of:
a cell radio network temporary identity C-RNTI MAC CE;
data from an uplink common control channel, UL-CCCH;
reporting the data volume and the power margin to the MAC CE;
configured authorization validation MAC CE;
semi-persistent scheduling (SPS) confirming the MAC CE;
automatically confirming the MAC CE in an uplink manner;
filling Uu interfaces except the BSR with BSR MAC CE; and
a power headroom MAC CE, an extended power headroom MAC CE, a dual connection power headroom MAC CE, a single-inlet power headroom MAC CE, or a multi-inlet power headroom MAC CE;
the second type of information includes at least one of:
data from a target logical channel, the data from the target logical channel excluding data from the UL-CCCH;
recommending a bit rate to query the MAC CE;
the Uu interface is filled with BSR MAC CE;
the Uu interface fills the BSR; and
sidelink fills the BSR.
10. The method of claim 9, wherein prior to the transmitting the sidelink retransmission request BSR and the target information according to the transmission priority, the method further comprises:
and if the total amount of transmission resources required by the sidelink retransmission request BSR and the target information exceeds the residual transmission resources of the current TTI, and the sending priority of the target information is higher than the sending priority of the sidelink retransmission request BSR, truncating the sidelink retransmission request BSR according to the residual transmission resources.
11. The method of claim 10, wherein the transmitting the sidelink retransmission request BSR and the target information according to the transmission priority comprises:
and preferentially sending the target information and the sidelink retransmission request BSR after truncation processing.
12. A terminal device, comprising:
the priority determining module is used for determining the sending priority of the sidelink retransmission request BSR and the target information;
and a sending module, configured to send the sidelink retransmission request BSR and the target information according to the sending priority.
13. A terminal device, comprising: memory, processor and computer program stored on the memory and executable on the processor, which computer program, when executed by the processor, carries out the steps of the method according to any one of claims 1 to 11.
14. A computer-readable storage medium, characterized in that a computer program is stored on the computer-readable storage medium, which computer program, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 11.
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