Triggering edge link relay system cache status reporting method and user equipment and medium

Abstract

A method for triggering a cache status report of a side link relay system, a user device, and a medium, the method comprising: determining a resource allocation mode configured to autonomously select communication resources from a pre-configured resource pool; when a preset trigger condition is detected, sending a cache status report to a base station, so that the base station learns the amount of data cached by the relay device according to the cache status report. The above scheme enables the base station to learn the amount of data currently cached by the relay device, and then allocates corresponding communication resources to the relay device in a targeted manner, thereby improving the utilization rate of communication resources and reducing transmission delay.

Description

Technical Field

[0001] The present invention relates to the field of wireless communication technology, and in particular to a buffer status reporting method for a triggered side link relay system, user equipment, and a medium. Background Art

[0002] In Release 12, LTE introduced Proximity Based Services (ProSe) direct communication. Different User Equipment (UE) can communicate directly with each other. The communication interface between UEs is the PC5 interface, and the communication interface between UEs and base stations is the Uu interface. rd When studying the system architecture of ProSe direct communication, the system and service working group of the 3rd Generation Partnership Project (3GPP) introduced a UE-to-network relay communication architecture. This architecture enables UE A, which cannot communicate directly with the base station, to relay service data through other UE B to achieve communication with the base station.

[0003] like Figure 1 Figure 1 shows an existing UE-to-network relay scenario. The Remote UE maintains a communication link with the gNB and establishes a relay link with a Relay UE (relay device). The communication interface between the Remote UE and the gNB is the Uu interface, the communication interface between the Relay UE and the gNB is the Uu interface, and the communication interface between the Relay UE and the Remote UE is the PC5 interface.

[0004] The control plane (CP) of the Remote UE is separated from the user plane (UP), such as Figure 2 Figure 1 shows a schematic diagram of an existing separation of the control plane and user plane for a remote UE. CP information is sent via the direct link between the remote UE and the gNB. CP information includes radio resource control (RRC) and lower-layer information, such as scheduling requests (SRs), buffer status reports (BSRs), and media access control-control elements (MAC CEs). UP data is sent via the relay link between the remote UE and the base station, i.e., via the relay UE.

[0005] However, when sending UP data via the Relay UE, the base station does not know the amount of data buffered in the Relay UE, and therefore cannot allocate corresponding communication resources to the Relay UE in a targeted manner, resulting in low communication resource utilization and high transmission delay. Summary of the Invention

[0006] The embodiment of the present invention solves the technical problem that a base station cannot allocate corresponding communication resources to a relay UE, resulting in low communication resource utilization and high transmission delay.

[0007] To solve the above technical problems, an embodiment of the present invention provides a triggered edge link relay system cache status reporting method, including: determining a resource allocation method configured to autonomously select communication resources from a pre-configured resource pool; when it is detected that a preset trigger condition is met, sending a cache status report to a base station, so that the base station obtains the amount of data cached by the relay device based on the cache status report.

[0008] Optionally, the sending of the cache status report to the base station when it is detected that a preset trigger condition is met includes: sending the cache status report to the base station when it is detected that there is a data transmission demand.

[0009] Optionally, sending the cache status report to the base station when it is detected that a preset trigger condition is met includes: sending the cache status report to the base station when it is detected that a communication resource is selected from the resource pool.

[0010] Optionally, sending the cache status report to the base station when it is detected that a preset trigger condition is met includes: sending the cache status report to the base station when it is detected that data is ready to be sent to the relay device.

[0011] Optionally, the cache status report includes indication information, and the indication information is used to indicate at least one of the following: the resource allocation method corresponding to the cache status report is to autonomously select communication resources from a pre-configured resource pool, and the resource allocation method corresponding to the cache status report is to allocate communication resources to the base station.

[0012] To solve the above technical problems, an embodiment of the present invention also provides a user device, including: a determination unit, used to determine a resource allocation method configured to autonomously select communication resources from a pre-configured resource pool; a sending unit, used to send a cache status report to a base station when it detects that a preset trigger condition is met, so that the base station obtains the amount of data cached by the relay device based on the cache status report.

[0013] Optionally, the sending unit is configured to send the cache status report to the base station when detecting that there is a data sending demand.

[0014] Optionally, the sending unit is configured to send the cache status report to the base station when detecting that a communication resource is selected from the resource pool.

[0015] Optionally, the sending unit is configured to send the cache status report to the base station when detecting that data is ready to be sent to the relay device.

[0016] Optionally, the cache status report includes indication information, and the indication information is used to indicate at least one of the following: the resource allocation method corresponding to the cache status report is to autonomously select communication resources from a pre-configured resource pool, and the resource allocation method corresponding to the cache status report is to allocate communication resources to the base station.

[0017] An embodiment of the present invention also provides a computer-readable storage medium, which is a non-volatile storage medium or a non-transient storage medium, on which a computer program is stored. When the computer program is run by a processor, it executes the steps of any of the above-mentioned methods for triggering the cache status reporting of the edge link relay system.

[0018] An embodiment of the present invention also provides a user device, including a memory and a processor, wherein the memory stores a computer program that can be run on the processor, and when the processor runs the computer program, it executes any of the steps of the above-mentioned method for triggering the edge link relay system cache status reporting.

[0019] Compared with the prior art, the technical solution of the embodiment of the present invention has the following beneficial effects:

[0020] When the user equipment is configured to autonomously select the resource allocation method of communication resources from the resource pool, if it detects that the trigger condition is met, it sends a cache status report to the base station, so that the base station can know the amount of data currently cached by the relay device based on the received cache status report, and then configure the corresponding communication resources for the relay device in a targeted manner, thereby improving the utilization rate of communication resources and reducing transmission delay.

[0021] Furthermore, the buffer status report carries indication information for indicating the resource allocation mode corresponding to the buffer status report. Upon receiving the buffer status report, the base station can distinguish which resource allocation mode the buffer status report indicates the user equipment is in, thereby allocating corresponding communication resources for different resource allocation modes. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is an existing UE-to-network Relay scenario diagram;

[0023] Figure 2 This is a schematic diagram of an existing separation of the control plane and user plane of a Remote UE;

[0024] Figure 3 This is a flow chart of a method for triggering a buffer status report of an edge link relay system in an embodiment of the present invention;

[0025] Figure 4 It is a structural diagram of a user equipment in an embodiment of the present invention. DETAILED DESCRIPTION

[0026] In the embodiment of the present invention, unless otherwise specified, the user equipment corresponds to Figure 1 、 Figure 2 The Remote UE in the relay device corresponds to Figure 1 、 Figure 2 The Relay UE in the above mentioned base station corresponds to Figure 1 、 Figure 2 gNB in ​​the.

[0027] In the prior art, there are two resource allocation modes in NR sidelink: Mode 1 and Mode 2. Mode 1 is a resource allocation mode centrally scheduled by the base station. That is, the user equipment sends a communication resource request message to the base station. After receiving the communication resource request message, the base station issues the corresponding communication resources to the user equipment. Mode 2 is a resource allocation mode autonomously selected by the user equipment. That is, the base station pre-configures a resource pool, and the user equipment autonomously selects communication resources from the pre-configured resource pool through sensing.

[0028] In the sidelink relay communication system, in the mode 2 resource allocation method, the user equipment does not need to report the BSR to the base station. The base station cannot know the amount of data cached in the relay device, resulting in the base station being unable to allocate corresponding communication resources to the relay device in a targeted manner, resulting in low communication resource utilization and high transmission latency.

[0029] In an embodiment of the present invention, when a user device is configured to autonomously select a resource allocation method for communication resources from a resource pool, if it detects that a trigger condition is met, it sends a cache status report to the base station, so that the base station can obtain the amount of data currently cached by the relay device based on the received cache status report, and then configure corresponding communication resources for the relay device in a targeted manner, thereby improving the utilization rate of communication resources and reducing transmission delay.

[0030] In order to make the above-mentioned objects, features and beneficial effects of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0031] The embodiment of the present invention provides a method for triggering a buffer status report of an edge link relay system, referring to Figure 3 , the following is a detailed description through specific steps.

[0032] Step S301: determining a resource allocation mode configured to autonomously select communication resources from a pre-configured resource pool.

[0033] In practical applications, there are two resource allocation modes in NR sidelink: Mode 1 and Mode 2. Mode 1 is a base station-centrally scheduled resource allocation mode. User equipment (UE) sends a communication resource request message to the base station, which then issues the corresponding communication resources. Mode 2 is a UE-autonomous resource allocation mode. The base station preconfigures a resource pool, and the UE autonomously selects communication resources from the preconfigured resource pool through sensing.

[0034] Therefore, in the embodiment of the present invention, a resource allocation mode configured to autonomously select communication resources from a pre-configured resource pool is determined, which corresponds to the above-mentioned mode 2 resource allocation mode.

[0035] Step S302: When it is detected that a preset trigger condition is met, a buffer status report is sent to the base station.

[0036] In a specific implementation, the user equipment may detect whether a preset trigger condition is met. When it is determined that the preset trigger condition is met, the user equipment may send a buffer status report to the base station.

[0037] In the embodiment of the present invention, when the user equipment detects that there is a data transmission demand, it can be determined that a preset trigger condition is met. At this time, the user equipment can send a buffer status report to the base station.

[0038] Because the user device is configured for Mode 2 resource allocation, its uploaded data must be forwarded via a relay device. Therefore, when the user device needs to send data to the base station, it can send a buffer status report to the base station. Upon receiving the buffer status report, the base station can determine the amount of data buffered at the relay device and allocate appropriate communication resources to the relay device.

[0039] In the embodiment of the present invention, when the user equipment detects that a communication resource is selected from a pre-configured resource pool, it can be determined that a preset trigger condition is satisfied, and the user equipment can send a buffer status report to the base station.

[0040] When a user device selects communication resources from a preconfigured resource pool, it indicates that the user device has data to send. Because data uploaded by the user device must be forwarded via a relay device, when the user device has a data transmission requirement—that is, when it needs to send data to the base station—it can send a buffer status report to the base station. Upon receiving the buffer status report, the base station learns the amount of data buffered at the relay device and allocates appropriate communication resources to the relay device.

[0041] In the embodiment of the present invention, when the user equipment detects that it is ready to send data to the relay device, it can be determined that a preset trigger condition is met, and the user equipment can send a buffer status report to the base station.

[0042] When a user device prepares to send data to a relay device, it means the user device is about to send the data to the relay device. Because the data to be uploaded by the user device must be forwarded through the relay device, the user device sends a buffer status report to the base station. Upon receiving the buffer status report, the base station determines the amount of data buffered at the relay device and allocates appropriate communication resources to the relay device.

[0043] In existing protocols, when a user equipment uses Mode 1 resource allocation, it reports a Base Response (BSR) to the base station, informing the base station of the amount of data currently buffered by the user equipment and allowing the base station to determine the communication resources required by the user equipment. When a user equipment uses Mode 2 resource allocation, the user equipment directly selects communication resources from the resource pool without reporting the BSR to the base station.

[0044] In an embodiment of the present invention, when the user equipment uses the mode 2 resource allocation method, if it detects that the trigger condition is met, it sends a cache status report to the base station, so that the base station can obtain the amount of data currently cached by the relay device based on the received cache status report, and then configure corresponding communication resources for the relay device in a targeted manner, thereby improving the utilization of communication resources and reducing transmission delay.

[0045] In a specific implementation, the buffer status report sent by the user equipment to the base station may further include indication information, which may be used to indicate the resource allocation method corresponding to the reported buffer status report. In an embodiment of the present invention, the indication information is used to indicate at least one of the following: the resource allocation method corresponding to the buffer status report is to autonomously select communication resources from a preconfigured resource pool; and the resource allocation method corresponding to the buffer status report is to allocate communication resources to the base station.

[0046] In other words, the indication information is used to indicate that the reported buffer status report is a buffer status report corresponding to the mode 1 resource allocation mode, and / or the indication information is used to indicate that the reported buffer status report is a buffer status report corresponding to the mode 2 resource allocation mode.

[0047] By carrying indication information in the cache status report, the base station can know whether the resource allocation mode currently configured for the user equipment is mode 1 or mode 2, so that the base station can clearly configure communication resources for the user equipment or allocate communication resources to the relay device, and then allocate corresponding communication resources to the user equipment or relay device for data transmission.

[0048] Reference Figure 4 , a user equipment 40 in an embodiment of the present invention is provided, comprising: a determining unit 401 and a sending unit 402, wherein:

[0049] The determining unit 401 is configured to determine a resource allocation mode configured to autonomously select communication resources from a pre-configured resource pool;

[0050] The sending unit 402 is configured to send a buffer status report to the base station when detecting that a preset trigger condition is met, so that the base station learns the amount of data buffered by the relay device according to the buffer status report.

[0051] In a specific implementation, the sending unit 402 may be configured to send the buffer status report to the base station when detecting that there is a data transmission demand.

[0052] In a specific implementation, the sending unit 402 may be configured to send the buffer status report to the base station when detecting that a communication resource is selected from the resource pool.

[0053] In a specific implementation, the sending unit 402 may be configured to send the buffer status report to the base station when detecting that data is to be sent to the relay device.

[0054] In a specific implementation, the cache status report may include indication information, and the indication information is used to indicate at least one of the following: the resource allocation method corresponding to the cache status report is to autonomously select communication resources from a pre-configured resource pool, and the resource allocation method corresponding to the cache status report is to allocate communication resources to the base station.

[0055] An embodiment of the present invention also provides a computer-readable storage medium, which is a non-volatile storage medium or a non-transient storage medium, on which a computer program is stored. When the computer program is run by a processor, the steps of the triggering edge link relay system cache status reporting method provided in any of the above embodiments are executed.

[0056] An embodiment of the present invention also provides another user device, including a memory and a processor, wherein the memory stores a computer program that can be run on the processor, and when the processor runs the computer program, it executes the steps of the triggering edge link relay system cache status reporting method provided in any of the above embodiments.

[0057] Those skilled in the art will understand that all or part of the steps in the various methods of the above embodiments can be completed by instructing the relevant hardware through a program, and the program can be stored in a computer-readable storage medium, which may include: ROM, RAM, disk or CD, etc.

[0058] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be based on the scope defined by the claims.

Claims

1. A method for triggering a buffer status report of an edge link relay system, characterized in that: include: determining a resource allocation mode configured to autonomously select communication resources from a preconfigured resource pool; When it is detected that a preset trigger condition is met, a cache status report is sent to the base station so that the base station obtains the amount of data cached by the relay device based on the cache status report; the cache status report includes indication information, and the indication information is used to indicate at least one of the following: the resource allocation method corresponding to the cache status report is to autonomously select communication resources from a pre-configured resource pool, and the resource allocation method corresponding to the cache status report is to allocate communication resources to the base station.

2. The trigger edge link relay system buffer status reporting method according to claim 1, characterized in that: The sending of a buffer status report to a base station when a preset trigger condition is detected to be met includes: When it is detected that there is a data transmission demand, the buffer status report is sent to the base station.

3. The trigger edge link relay system buffer status reporting method according to claim 1, characterized in that: The sending of a buffer status report to a base station when a preset trigger condition is detected to be met includes: When it is detected that a communication resource is selected from the resource pool, the buffer status report is sent to the base station.

4. The trigger edge link relay system buffer status reporting method according to claim 1, characterized in that: The sending of a buffer status report to a base station when a preset trigger condition is detected to be met includes: When it is detected that data is ready to be sent to the relay device, the buffer status report is sent to the base station.

5. A user equipment, characterized in that: include: a determining unit, configured to determine a resource allocation mode configured to autonomously select communication resources from a pre-configured resource pool; A sending unit is used to send a cache status report to a base station when it detects that a preset trigger condition is met, so that the base station can learn the amount of data cached by the relay device based on the cache status report; the cache status report includes indication information, and the indication information is used to indicate at least one of the following: the resource allocation method corresponding to the cache status report is to autonomously select communication resources from a pre-configured resource pool, and the resource allocation method corresponding to the cache status report is to allocate communication resources to the base station.

6. The user equipment according to claim 5, characterized in that The sending unit is configured to send the buffer status report to the base station when detecting that there is a data sending demand.

7. The user equipment according to claim 5, characterized in that The sending unit is used to send the buffer status report to the base station when it is detected that a communication resource is selected from the resource pool.

8. The user equipment according to claim 5, characterized in that The sending unit is configured to send the buffer status report to the base station when detecting that data is ready to be sent to the relay device.

9. A computer-readable storage medium, wherein the computer-readable storage medium is a non-volatile storage medium or a non-transient storage medium, and a computer program is stored thereon, wherein: When the computer program is executed by a processor, the steps of the method for triggering a buffer status report of a side link relay system according to any one of claims 1 to 4 are executed.

10. A user equipment, comprising a memory and a processor, wherein the memory stores a computer program executable on the processor, characterized in that: When the processor runs the computer program, the processor executes the steps of the method for triggering cache status reporting of an edge link relay system according to any one of claims 1 to 4.

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