KR-20260065826-A - Data transmission method and device

Abstract

The present application provides a data transmission method and apparatus. The present method is applied to a source base station in a handover process of a terminal device. The present method comprises the steps of: transmitting a first handover request—the first handover request includes Quality of Service (QoS) parameters for a set of Protocol Data Units (PDUs) of the terminal device—; receiving first indication information—the first indication information indicates the processing capability of a target base station in a handover process of the terminal device for a set of PDUs—; and performing a handover operation based on the first indication information. In this way, waste of resources caused by discrepancies between the capabilities of base stations during buffered data forwarding during inter-base station handover can be avoided, thereby improving forwarding efficiency.

Inventors

• 루, 위자오
• 판, 창
• 주, 위안핑

Assignees

• 후아웨이 테크놀러지 컴퍼니 리미티드

Dates

Publication Date

20260511

Application Date

20240806

Priority Date

20230810

Claims (20)

1. As a data transmission method, The above method is applied to the source base station in the handover process of the terminal device, and A step of transmitting a first handover request—the first handover request includes Quality of Service (QoS) parameters for a set of Protocol Data Unit (PDU) of the terminal device—; A step of receiving first indication information—the first indication information indicates the processing capability of the target base station in the handover process of the terminal device for the PDU set—; and Step of performing a handover operation based on the first display information above A method including
2. In paragraph 1, A method in which the above QoS parameters include one or more of the protocol data unit set delay budget PSDB, the protocol data unit set error rate PSER, and the protocol data unit set integration information PSIHI.
3. In paragraph 1 or 2, The step of performing the handover operation based on the first display information is: A method comprising the step of transmitting a first buffered data packet when the first indication information indicates that the target base station has processing capability for the PDU set, wherein the first buffered data packet includes relevant information of the PDU set.
4. In paragraph 1 or 2, The step of performing the handover operation based on the first display information is: A method comprising the steps of: transmitting a second buffered data packet when the first indication information indicates that the target base station does not have processing capability for the set of PDUs—the second buffered data packet does not contain relevant information for the set of PDUs—; or determining a new target base station; or transmitting a second handover request to the target base station—the second handover request does not contain QoS parameters for the set of PDUs.
5. As a data transmission method, The above method is applied to the source base station of the terminal device, and A step of transmitting a first capability query message—the first capability query message is used to query the processing capability of at least one candidate base station for a set of protocol data units (PDUs), and the at least one candidate base station is used in the handover process of the terminal device—; Step of receiving second indication information—the second indication information indicates the processing capability of at least one candidate base station for the set of PDUs—; and Step of performing a handover operation based on the second display information above A method including
6. In paragraph 5, The step of performing the handover operation based on the second display information above is: A method comprising the step of determining, as a target base station, the candidate base station having the processing capability for the set of PDUs indicated by the second indication information in the handover process of the terminal device.
7. In paragraph 5, The step of performing the handover operation based on the second display information above is: A method comprising the step of transmitting a third buffered data when, in a handover process of the terminal device, one of the at least one candidate base station is determined as a target base station, and the target base station does not have the capability to process the PDU set, wherein the third buffered data does not include relevant information of the PDU set.
8. As a data transmission method, The above method is applied to the first base station, and Step of determining third display information—the third display information indicates capability information of the first base station for a low-latency, low-loss, and scalable throughput L4S mechanism—; and The step of transmitting the third indication information to the core network when the trigger condition is satisfied A method including
9. In paragraph 8, The above third indication information is a method of indicating whether the above first base station has both the ability to mark an explicit congestion notification ECN and the ability to report congestion information.
10. In paragraph 8, The above third display information is a method of indicating whether the first base station has ECN marking capability and/or whether the first base station has congestion information reporting capability.
11. In paragraph 8, The above third display information is a method of indicating whether the above first base station has ECN marking capability or congestion information reporting capability.
12. In any one of paragraphs 8 through 11, Before the step of determining the third display information above, the method is: The method further comprises the step of receiving a first capability report request—wherein the first capability report request is used to request capability information of the first base station for the L4S mechanism—and The step of transmitting the third display information when the above trigger condition is satisfied is: A method comprising the step of transmitting the third indication information in response to the first capability report request.
13. In any one of paragraphs 8 through 11, Before the step of determining the third display information above, the method is: The method further comprises the step of receiving a first start message—the first start message indicates to the first base station to mark an ECN and/or start a congestion information reporting operation—and The step of transmitting the third display information when the above trigger condition is satisfied is: A method comprising the step of transmitting the third marking information when the first base station has or does not have the ECN marking capability and/or the congestion information reporting capability.
14. As a data transmission device, The above device includes a transceiver unit and a processing unit, and The above transceiver unit is configured to transmit a first handover request, and the first handover request includes a Quality of Service (QoS) parameter for a Protocol Data Unit (PDU) set of the terminal device; The above transceiver unit is configured to receive first indication information—the first indication information indicates the processing capability of the target base station for the PDU set in the handover process of the terminal device—; The above processing unit is a device configured to perform a handover operation based on the above first display information.
15. In Paragraph 14, The above QoS parameter is a device comprising one or more of the protocol data unit set delay budget PSDB, the protocol data unit set error rate PSER, and the protocol data unit set integration information PSIHI.
16. In paragraph 14 or 15, The above processing unit specifically: A device configured to control the transceiver unit to transmit a first buffered data packet when the first indication information indicates that the target base station has processing capability for the PDU set, wherein the first buffered data packet includes relevant information of the PDU set.
17. In paragraph 14 or 15, The above processing unit specifically: A device configured to control the transceiver unit to transmit a second buffered data packet—wherein the first indication information indicates that the target base station does not have processing capability for the PDU set—or to determine a new target base station; or to control the transceiver unit to transmit a second handover request to the target base station, wherein the second handover request does not include QoS parameters for the PDU set.
18. As a data transmission device, The above device includes a transceiver unit and a processing unit, and The above transceiver unit is configured to transmit a first capability query message, the first capability query message is used to query the processing capability of at least one candidate base station for a set of protocol data units (PDUs), and the at least one candidate base station is used in the handover process of the terminal device; The above transceiver unit is configured to receive second display information, and the second display information indicates the processing capability of at least one candidate base station for the set of PDUs; The above processing unit is a device configured to perform a handover operation based on second display information.
19. In Paragraph 18, The above processing unit specifically: A device configured to determine the candidate base station having the processing capability for the set of PDUs indicated by the second indication information as the target base station in the handover process of the terminal device.
20. In Paragraph 18, The above processing unit specifically: A device configured to control a transceiver unit to transmit third buffered data when, in a handover process of the terminal device, one of the at least one candidate base station is determined as a target base station and the target base station does not have the capability to process the PDU set, wherein the third buffered data does not contain relevant information of the PDU set.

Description

Data transmission method and device This application claims priority to Chinese patent application No. 202311015533.2, filed with the China Intellectual Property Administration on August 10, 2023, with the title of the invention "DATA TRANSMISSION METHOD AND APPARATUS", the entirety of which is incorporated herein by reference. This application relates to the field of communications, and more specifically, to a data transmission method and apparatus. With the continuous advancement of communication technologies, extended reality (XR) is one of the 5G multimedia applications currently being considered as a major issue in the industrial sector. 5G systems forward and process data based on the granularity of quality of service (QoS) flows and guarantee the quality of service (QoS) of the data. In a 5G system, the 5G core network (5GC) uses QoS profiles to represent the QoS requirements of different QoS flows to the radio access network (RAN). For common services in a 5G system, QoS guarantees are required only at the granularity of protocol data units (PDUs). However, for XR services, QoS guarantees are generally expected to be required at the granularity of PDU sets. For XR services, base stations generally need to have processing capabilities for PDU sets. Therefore, base stations report their processing capabilities for PDU sets to the core network. When a terminal device undergoes inter-base-station handover, avoiding the waste of resources caused by the mismatch between the capabilities of the source and target base stations during the handover process becomes an urgent problem that must be solved. FIG. 1 is a drawing of a communication system according to an embodiment of the present application; FIG. 2 is a diagram of a 5G system based on a QoS architecture according to an embodiment of the present application; FIG. 3 is a schematic flowchart of a handover between base stations according to an embodiment of the present application; FIG. 4 is a schematic flowchart of a handover between base stations in an XR service according to an embodiment of the present application; FIG. 5 is a schematic flowchart of a data transmission method according to an embodiment of the present application; FIG. 6 is a schematic flowchart of another data transmission method according to an embodiment of the present application; FIG. 7 is a schematic flowchart of another data transmission method according to an embodiment of the present application; FIG. 8 is a schematic flowchart of the behaviors of a target base station according to an embodiment of the present application; FIG. 9 is a schematic flowchart of the behaviors of a source base station according to an embodiment of the present application; FIG. 10 is a schematic flowchart of another data transmission method according to an embodiment of the present application; FIG. 11 is a schematic flowchart of another data transmission method according to an embodiment of the present application; FIG. 12 is a diagram of the operation mode of the L4S mechanism according to an embodiment of the present application; FIG. 13 is a schematic flowchart of another data transmission method according to an embodiment of the present application; FIG. 14 is a drawing of a data transmission device (1400) according to an embodiment of the present application; FIG. 15 is a diagram of the structure of a data transmission device (1500) according to an embodiment of the present application; FIG. 16 is a drawing of a chip system (1600) according to an embodiment of the present application. The technical solutions of the present application are described below with reference to the accompanying drawings. The technical solutions of the embodiments of the present application may be applied to various communication systems, for example, Global System for Mobile communications (GSM), Code Division Multiple Access (CDMA) systems, Wideband Code Division Multiple Access (WCDMA) systems, General Packet Radio Service (GPRS) systems, Long Term Evolution (LTE) systems, LTE Frequency Division Duplex (FDD) systems, LTE Time Division Duplex (TDD) systems, Universal Mobile Telecommunications System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) communication systems, 5th Generation (5G) systems, or New Radio (NR) systems. FIG. 1 is a drawing of a communication system according to an embodiment of the present application. As illustrated in FIG. 1, a communication system to which the solutions in the embodiments of the present application are applied may include access network devices, terminal devices, and a core network. The communication system may be used for information exchange between the access network devices and the core network, or for information exchange between the access network devices. For example, as illustrated in FIG. 1, each of access network device #1 and access network device #2 may communicate with the core network through an NG interface. Access network device #1 and access