WO2023185608A1 - Procédé de transmission de données et appareil de communication - Google Patents

Procédé de transmission de données et appareil de communication Download PDF

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Publication number
WO2023185608A1
WO2023185608A1 PCT/CN2023/083272 CN2023083272W WO2023185608A1 WO 2023185608 A1 WO2023185608 A1 WO 2023185608A1 CN 2023083272 W CN2023083272 W CN 2023083272W WO 2023185608 A1 WO2023185608 A1 WO 2023185608A1
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WIPO (PCT)
Prior art keywords
qos
data flow
identifier
qos data
access network
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PCT/CN2023/083272
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English (en)
Chinese (zh)
Inventor
曹佑龙
秦熠
陈二凯
范强
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华为技术有限公司
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Publication of WO2023185608A1 publication Critical patent/WO2023185608A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/24—Negotiating SLA [Service Level Agreement]; Negotiating QoS [Quality of Service]

Definitions

  • the present application relates to the field of communications, and more specifically, to a data transmission method and a communications device.
  • the 5G communication system gradually penetrates into some real-time multimedia services, such as video transmission, Cloud gaming (CG), extended reality (XR), tactile internet (TI), etc., among which XR includes virtual reality (VR) and augmented reality (AR).
  • CG Cloud gaming
  • XR extended reality
  • TI tactile internet
  • AR augmented reality
  • QoS user quality of service
  • This application provides a data transmission method and communication device, which helps to meet the transmission requirements of application layer data during physical layer transmission, thereby providing appropriate transmission guarantee for data transmission and improving user experience.
  • the first aspect provides a data transmission method, which can be executed by the access network device, or can be executed by a chip or circuit configured in the access network device, or can also be executed by a device that can realize all or Logical modules or software execution of some access network equipment functions. This application does not limit this.
  • the method includes: receiving quality of service QoS configuration information from a core network element, the QoS configuration information including a first QoS identifier and a second QoS identifier, the first QoS identifier indicating a first QoS data flow QoS, the second QoS identifier indicates the QoS of the second QoS data flow, the first QoS identifier and the second QoS identifier also indicate the first QoS data flow and the second QoS data flow respectively map to different wireless bearers; map the first QoS data flow and the second QoS data flow to the first wireless bearer and the second wireless bearer respectively, and send the first wireless bearer to the terminal device through the first wireless bearer.
  • the data of the first QoS data flow is sent to the terminal device through the second wireless bearer.
  • the data of the second QoS data flow is sent to the terminal device.
  • the access network device can obtain the first QoS identifier and the second QoS identifier according to the QoS configuration information.
  • the first QoS identifier and the second QoS identifier require or recommend that the access network device will
  • the first QoS data flow and the second QoS data flow are respectively mapped to different radio bearers, and the first QoS data flow and the second QoS data flow are respectively mapped to the first radio bearer and the second radio bearer for transmission.
  • the terminal device from It provides appropriate transmission guarantee for data transmission of XR business and improves user experience.
  • a data transmission method is provided.
  • the method can be executed by the core network equipment, or it can also be executed by the chip or circuit configured in the core network equipment, or it can also be implemented by all or part of the core network equipment.
  • Logic modules or software execution of network device functions This application does not limit this.
  • the method includes: sending quality of service QoS configuration information to the access network device, the QoS configuration information including a first QoS identifier and a second QoS identifier, the first QoS identifier indicating QoS of the first QoS data flow, The second QoS identifier indicates the QoS of the second QoS data flow, and the first QoS identifier and the second QoS identifier also indicate the respective mapping of the first QoS data flow and the second QoS data flow. due to different access network resources.
  • the core network device can send QoS configuration information to the access network device, including the first QoS identifier and the second QoS identifier.
  • the first QoS identifier and the second QoS identifier are used to request Or it is recommended that the access network equipment maps the first QoS data flow and the second QoS data flow to different radio bearers, and maps the first QoS data flow and the second QoS data flow to the first QoS data flow.
  • the wireless bearer and the second wireless bearer are sent to the terminal equipment, thereby providing appropriate transmission guarantee for data transmission of XR services and improving user experience.
  • the core network device may be a session management function (SMF) network element.
  • SMS session management function
  • the access network device when the access network device establishes a protocol data unit (PDU) session with the SMF network element, it establishes a QoS flow with synchronization association.
  • PDU protocol data unit
  • the SMF network element sends QoS to the access network device.
  • Configuration information the QoS configuration information includes a first QoS identifier and a second QoS identifier.
  • the QoS configuration information may be a QoS configuration file.
  • the first QoS identifier and the second QoS identifier may be 5G QoS identifiers (5G quality identifier, 5QI).
  • the first QoS identifier and the second QoS identifier also indicate that the first QoS data flow and the second QoS data flow are respectively mapped to different access network resources.
  • the SMF network element suggests It may be necessary to guide or incline the access network device to map the first QoS data flow and the second QoS data flow to different access network resources respectively.
  • the access network device may receive the QoS No corresponding mapping action is performed after the identifier.
  • the embodiments of the present application do not limit this.
  • the method further includes: the first QoS identifier further indicates that the wireless bearer carrying the first QoS data flow only carries the first QoS data flow. QoS data flow.
  • the first QoS identifier indicates that the wireless bearer carrying the first QoS data flow only carries one QoS data flow, thereby directly providing an independent transmission channel for the QoS data flow to meet the data transmission requirements of the XR service , improve user experience.
  • the method further includes: the second QoS identifier further indicates that the wireless bearer carrying the second QoS data flow only carries the second QoS data flow. QoS data flow.
  • the second QoS identifier indicates that the wireless bearer carrying the second QoS data flow only carries one QoS data flow, thereby directly providing an independent transmission channel for the QoS data flow, further meeting the requirements of the XR service Data transmission requirements to improve user experience.
  • the method further includes: the business importance of the first QoS data flow is higher than the business importance of the second QoS data flow. sex.
  • the business importance of the first QoS data flow and the business importance of the second QoS data flow can be determined based on at least one parameter such as priority, data delay, packet error rate, average window and maximum data burst amount.
  • the embodiments of the present application do not limit this.
  • the method further includes: the first QoS data flow and the second QoS data flow belong to the same data unit.
  • the transmitted data when the transmitted data is data in the video service or data in the XR service, the data unit may be a video frame, a video frame slice, or a video frame tile.
  • the first QoS data stream and the second QoS data stream can be data streams of multiple different video encoding methods, so this technical solution can be applicable to multiple video encoding scenarios.
  • the data unit can also be an application data unit, a tactile multi-stream signal, a media unit or a protocol data unit.
  • a data transmission method is provided.
  • the method can be executed by the access network device, or it can also be executed by a chip or circuit configured in the access network device, or it can also be executed by a device that can realize all or Logical modules or software execution of some access network equipment functions. This application does not limit this.
  • the method includes: receiving quality of service QoS configuration information from a core network element, the QoS configuration information including a first QoS identifier indicating the QoS of the first QoS data flow, the first The QoS identifier also indicates that the radio bearer carrying the first QoS data flow only carries the first QoS data flow; the first QoS data flow is mapped to the first radio bearer, through the first radio bearer Send the data of the first QoS data flow to the terminal device.
  • the access network device can obtain the first QoS identifier according to the QoS configuration information.
  • the first QoS identifier requires or recommends the access network device to separately map the first QoS data flow to a wireless bearer, through The wireless bearer sends the data packets of the data stream to the terminal device, thereby providing appropriate transmission guarantee for data transmission of XR services and improving user experience.
  • the fourth aspect provides a data transmission method, which can be executed by the core network device, or can be executed by a chip or circuit configured in the core network device, or can also be executed by a device that can realize all or part of the core.
  • Logic modules or software execution of network device functions This application does not limit this.
  • the method includes: sending quality of service QoS configuration information to the access network device, the QoS configuration information including a first QoS identifier indicating the QoS of the first QoS data flow, the first QoS identifier The symbol also indicates that the first access network resource carrying the first QoS data flow only carries the first QoS data flow.
  • the core network device can send QoS configuration information to the access network device, including the first QoS identifier.
  • the first QoS identifier is used to require or recommend that the access network device transmits the first QoS data.
  • the stream is individually mapped to a wireless bearer, and the data packets of the data stream are sent to the terminal device through the wireless bearer, thereby providing appropriate transmission guarantee for data transmission of XR services and improving user experience.
  • the core network equipment may be an SMF network element.
  • the access network device when the access network device establishes a PDU session with the SMF network element, it establishes a QoS flow with synchronization association.
  • the SMF network element sends QoS configuration information to the access network device.
  • the QoS configuration information includes the first A QoS identifier.
  • the QoS configuration information may be a QoS configuration file.
  • the first QoS identifier may be 5QI.
  • the first QoS identifier also indicates that the first access network resource carrying the first QoS data flow only carries the first QoS data flow.
  • the SMF network element recommends or needs or guides or It is preferable that the access network device maps the first QoS data flow to an access network resource alone. In other words, the access network device may not perform the corresponding mapping action after receiving the QoS identifier. The embodiments of the present application do not limit this.
  • the method further includes: the above-mentioned QoS configuration information further includes a second QoS identifier, the second QoS identifier indicates a second QoS of the QoS data flow, the second QoS identifier also indicates that the second access network resource carrying the second QoS data flow only carries the second QoS data flow.
  • the second QoS identifier indicates that the wireless bearer carrying the second QoS data flow only carries one QoS data flow, thereby directly providing an independent transmission channel for the QoS data flow, further meeting the requirements of the XR service Data transmission requirements to improve user experience.
  • the method further includes: the service importance of the first QoS data flow is higher than that of the second QoS data flow. Business importance.
  • the business importance of the first QoS data flow and the business importance of the second QoS data flow can be determined based on at least one parameter such as priority, data delay, packet error rate, average window and maximum data burst amount.
  • the embodiments of the present application do not limit this.
  • the method further includes: the first QoS data flow and the second QoS data flow belong to the same data unit.
  • a data transmission device may be an access network device, or may be a chip or circuit configured in the access network device. This application is not limited to this.
  • the device includes: an interface unit configured to receive quality of service QoS configuration information from a core network element, where the QoS configuration information includes a first QoS identifier and a second QoS identifier, where the first QoS identifier indicates the QoS of a QoS data flow, the second QoS identifier indicates the QoS of the second QoS data flow, the first QoS identifier and the second QoS identifier also indicate the first QoS data flow and the The second QoS data flow is mapped to different wireless bearers respectively; a processing unit is configured to map the first QoS data flow and the second QoS data flow to the first wireless bearer and the second wireless bearer respectively, through the The first radio bearer sends the data of the first QoS data flow to the terminal device, and the second radio bearer sends the data of the second QoS data flow to the terminal device.
  • the QoS configuration information includes a first QoS identifier and a second QoS identifie
  • a sixth aspect provides a data transmission device.
  • the device may be a core network device, or may be a chip or circuit configured in the core network device. This application is not limited to this.
  • the device includes: an interface unit, configured to send quality of service QoS configuration information to the access network device, the QoS configuration information includes a first QoS identifier and a second QoS identifier, the first QoS identifier indicates the first QoS QoS of the data flow, the second QoS identifier indicates the QoS of the second QoS data flow, the first QoS identifier and the second QoS identifier also indicate the first QoS data flow and the second QoS QoS data flows are mapped to different access network resources respectively.
  • the QoS configuration information includes a first QoS identifier and a second QoS identifier
  • the first QoS identifier indicates the first QoS QoS of the data flow
  • the second QoS identifier indicates the QoS of the second QoS data flow
  • the first QoS identifier and the second QoS identifier also indicate the first QoS data flow and the second QoS QoS
  • the apparatus further includes: the first QoS identifier further indicates that the wireless bearer carrying the first QoS data flow only carries the Describe the first QoS data flow.
  • the device further includes: the service importance of the first QoS data flow is higher than the service importance of the second QoS data flow.
  • the device further includes: the first QoS data flow and the second QoS data flow belong to the same data unit.
  • a seventh aspect provides a data transmission device.
  • the device may be an access network device, or may be a chip or circuit configured in the access network device. This application is not limited to this.
  • the device includes: an interface unit, configured to receive quality of service QoS configuration information from a core network element, where the QoS configuration information includes a first QoS identifier, and the first QoS identifier indicates the QoS of the first QoS data flow. , the first QoS identifier also indicates that the wireless bearer carrying the first QoS data flow only carries the first QoS data flow; a processing unit configured to map the first QoS data flow to the first A wireless bearer that sends the data of the first QoS data stream to the terminal device through the first wireless bearer.
  • a data transmission device may be a core network device, or may be a chip or circuit configured in the core network device. This application is not limited to this.
  • the device includes: an interface unit, configured to send quality of service QoS configuration information to the access network device, where the QoS configuration information includes a first QoS identifier, and the first QoS identifier indicates the QoS of the first QoS data flow, so The first QoS identifier also indicates that the first access network resource carrying the first QoS data flow only carries the first QoS data flow.
  • the device further includes: the QoS configuration information further includes a second QoS identifier, the second QoS identifier indicates a second QoS of the QoS data flow, the second QoS identifier also indicates that the second access network resource carrying the second QoS data flow only carries the second QoS data flow.
  • the device further includes: the service importance of the first QoS data flow is higher than the service importance of the second QoS data flow.
  • the device further includes: the first QoS data flow and the second QoS data flow belong to the same data unit.
  • the present application provides a communication device, which device includes: at least one processor, the at least one processor is coupled to at least one memory, and the at least one processor is configured to execute a computer program stored in the at least one memory or Instructions enable the device to perform the method in any one of the above first to fourth aspects and possible implementation manners.
  • the present application provides a computer-readable medium.
  • Computer programs or instructions are stored on the computer-readable storage medium.
  • the computer program or instructions are run on a computer, the computer can implement the above-mentioned first aspect to The fourth aspect and the method in any possible implementation manner of the first to fourth aspects.
  • the present application provides a computer program product, including a computer program or instructions, which when executed, are used to implement the above first to fourth aspects and the first to fourth aspects. method in any of the possible implementations.
  • the present application provides a chip system, including: a processor configured to execute computer programs or instructions in the memory, so that the chip system implements the above first to fourth aspects and the first aspect to any possible implementation method in the fourth aspect.
  • a communication device which device includes a processor configured to execute the above-mentioned first The method in any possible implementation manner of the aspect to the fourth aspect and the first aspect to the fourth aspect.
  • Figure 1 is a schematic diagram of a network architecture suitable for the method according to the embodiment of the present application.
  • Figure 2 is another schematic diagram of a network architecture suitable for the method according to the embodiment of the present application.
  • Figure 3 is another schematic diagram of a network architecture suitable for the method according to the embodiment of the present application.
  • Figure 4 is a schematic diagram of the layered transmission process of an XR service applicable to the embodiment of the present application.
  • Figure 5 is a schematic diagram of a QoS guarantee mechanism suitable for embodiments of the present application.
  • FIG. 6 is a schematic flow chart of a data transmission method applicable to the embodiment of the present application.
  • Figure 7 is a schematic diagram of a mapping relationship between a QoS data flow and a radio bearer applicable to an embodiment of the present application.
  • FIG. 8 is another schematic flow chart of a data transmission method applicable to the embodiment of the present application.
  • Figure 9 is another schematic flow chart of a data transmission method applicable to the embodiment of the present application.
  • Figure 10 is a schematic block diagram of a communication device suitable for embodiments of the present application.
  • Figure 11 is a structural block diagram of a communication device suitable for embodiments of the present application.
  • LTE long term evolution
  • FDD frequency division duplex
  • TDD time division duplex
  • UMTS universal mobile telecommunication system
  • 5th generation, 5G new radio
  • new radio new radio
  • the technical solution provided by this application can also be applied to machine type communication (MTC), long term evolution-machine (LTE-M), and device-to-device (D2D).
  • MTC machine type communication
  • LTE-M long term evolution-machine
  • D2D device-to-device
  • MTC machine type communication
  • M2M machine to machine
  • IoT Internet of things
  • the IoT network may include, for example, the Internet of Vehicles.
  • the communication methods in the Internet of Vehicles system are collectively called vehicle to other devices (vehicle to X, V2X, X can represent anything).
  • the V2X can include: vehicle to vehicle (vehicle to vehicle, V2V) communication.
  • Figure 1 is a schematic diagram of a network architecture suitable for embodiments of the present application.
  • the network architecture may include user equipment 110, (wireless) access network equipment 120, user plane network element 130, data network 140, access management network element 150, session management network element 160, network opening Network element 170, policy control network element 180, application network element 190, etc.
  • Each network element involved in the network architecture is described below.
  • User equipment can also be called terminal, access terminal, user equipment. subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile equipment, user terminal, wireless communications equipment, user agent or user device.
  • the terminal in the embodiment of the present application may be a mobile phone (mobile phone), a tablet computer (pad), a computer with wireless transceiver function, a virtual reality (VR) terminal, an augmented reality (AR) terminal, an industrial Wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical, wireless terminals in smart grid, transportation safety Wireless terminals in smart cities, wireless terminals in smart homes, cellular phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop ( wireless local loop (WLL) station, personal digital assistant (PDA), handheld device with wireless communication capabilities, computing device or other processing device connected to a wireless modem, vehicle-mounted device, wearable device, in 5G network Terminals or terminals in future evolution networks, etc.
  • SIP session initiation protocol
  • WLL wireless local
  • wearable devices can also be called wearable smart devices. It is a general term for applying wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes, etc.
  • a wearable device is a portable device that is worn directly on the body or integrated into the user's clothing or accessories. Wearable devices are not just hardware devices, but also achieve powerful functions through software support, data interaction, and cloud interaction. Broadly defined wearable smart devices include full-featured, large-sized devices that can achieve complete or partial functions without relying on smartphones, such as smart watches or smart glasses, and those that only focus on a certain type of application function and need to cooperate with other devices such as smartphones. Use, such as various types of smart bracelets, smart jewelry, etc. for physical sign monitoring.
  • (Wireless) access network equipment (radio access network, (R)AN) 120 Access network equipment can also be called access equipment.
  • (R)AN can manage wireless resources and provide access services for user equipment. To complete the forwarding of user equipment data between the user equipment and the core network, (R)AN can also be understood as a base station in the network.
  • the access network device in the embodiment of the present application may be any communication device with wireless transceiver functions used to communicate with user equipment.
  • the access network equipment includes but is not limited to: evolved Node B (evolved Node B, eNB), wireless network controller (radio network controller, RNC), Node B (Node B, NB), base station controller (base station controller) , BSC), base transceiver station (base transceiver station, BTS), home base station (home evolved NodeB, HeNB, or home Node B, HNB), baseband unit (baseBand unit, BBU), wireless fidelity (wireless fidelity, WiFi)
  • gNB in the NR system
  • TRP or TP transmission point
  • BBU baseband unit
  • DU distributed unit
  • gNB may include centralized units (CUs) and DUs.
  • the gNB may also include an active antenna unit (AAU).
  • CU implements some functions of gNB
  • DU implements some functions of gNB.
  • the CU is responsible for processing non-real-time protocols and services, and implementing radio resource control (RRC) and packet data convergence protocol (PDCP) layer functions.
  • RRC radio resource control
  • PDCP packet data convergence protocol
  • DU is responsible for processing physical layer protocols and real-time services, and implementing the functions of the radio link control (RLC) layer, media access control (MAC) layer and physical (physical, PHY) layer.
  • RLC radio link control
  • MAC media access control
  • PHY physical layer
  • the RRC layer information is generated by the CU, and will eventually be encapsulated by the PHY layer of the DU into PHY layer information, or converted from the PHY layer information. Therefore, under this architecture, high-level signaling, such as RRC layer signaling, can also be considered to be sent by DU, or sent by DU+AAU.
  • the access network device may be a device including one or more of a CU node, a DU node, and an AAU node.
  • the CU can be divided into access network equipment in the access network (radio access network, RAN), or the CU can be divided into access network equipment in the core network (core network, CN). This application does not Make limitations.
  • the access network equipment can establish a data radio bearer (DRB).
  • DRB data radio bearer
  • User plane network element 130 As an interface with the data network, it completes functions such as user plane data forwarding, session/flow level-based billing statistics, and bandwidth limitation. That is, packet routing and forwarding and quality of service (QoS) processing of user plane data, etc.
  • QoS quality of service
  • the user plane network element can be a serving gateway user plane (SGW-U) or a packet data network gateway user plane (PGW) -U) or a network element co-located with SGW-U and PGW-U.
  • SGW-U serving gateway user plane
  • PGW packet data network gateway user plane
  • the user plane network element may be a user plane function (UPF) network element.
  • UPF user plane function
  • Data network 140 Provides, for example, operator services, Internet access or third-party services, including servers, which implement video source encoding, rendering, etc.
  • the data network may be a data network (DN).
  • DN data network
  • Access management network element 150 mainly used for mobility management and access management, etc., and can be used to implement other functions besides session management in the mobility management entity (MME) function, such as legal Monitoring and access authorization/authentication functions.
  • MME mobility management entity
  • the access management network element may be an MME network element.
  • the access management network element can be the access and mobility management function (AMF), which mainly performs functions such as mobility management and access authentication/authorization. In addition, it is also responsible for transmitting user policies between the terminal and the policy control function (PCF) network element.
  • AMF access and mobility management function
  • PCF policy control function
  • Session management network element 160 Mainly used for session management, Internet protocol (IP) address allocation and management of user equipment, selection of endpoints for manageable user plane functions, policy control and charging function interfaces, and downlink Data notifications, etc.
  • IP Internet protocol
  • the session management network element can be a session management network element, which can be a serving gateway control plane (SGW-C) or a packet data network gateway control plane (PGW-C). C) Or the network element co-located by SGW-C and PGW-C.
  • the session management network element can be a session management function (SMF) network element, which completes terminal IP address allocation, UPF selection, accounting and QoS policy control, etc.
  • Network open network element 170 In the LTE communication system, the network open network element may be a service capability exposure function (SCEF) network element. In the 5G communication system, the network open network element can be a network element function (NEF) network element, which is mainly used to expose the services and capabilities of 3GPP network functions to AF, and also allows AF to provide 3GPP network functions to AF. information.
  • SCEF service capability exposure function
  • NEF network element function
  • Policy control network element 180 includes user subscription data management functions, policy control functions, charging policy control functions, quality of service (QoS) control, etc., and is a unified policy framework used to guide network behavior. Provide policy rule information, etc. for control plane functional network elements (such as AMF, SMF network elements, etc.).
  • QoS quality of service
  • the policy control network element may be a policy control and charging function (PCRF).
  • the policy control network element may be the PCF.
  • the application network element may be a network slice selection function (NSSF) network element.
  • NSSF network slice selection function
  • Application network element 190 In the 5G communication system, the application network element can be an application function (AF) network element, which represents the application function of a third party or operator and is the interface for the 5G network to obtain external application data. It is mainly used to convey the requirements of the application side to the network side.
  • AF application function
  • the above network elements or devices may still use their names in the 4G or 5G communication systems, or may have other names, which are not limited in the embodiments of this application.
  • the functions of the above network elements or devices can be completed by an independent network element, or can be completed by several network elements together.
  • network elements in the core network can be deployed on the same or different physical devices.
  • AMF and SMF can be deployed on the same physical device.
  • the network elements of the 5G core network can be deployed on the same physical device as the network elements of the 4G core network.
  • the embodiments of the present application do not limit this.
  • Figure 1 is only an example and does not constitute any limitation on the scope of protection of the present application.
  • the communication method provided by the embodiment of the present application may also involve network elements not shown in Figure 1.
  • the communication method provided by the embodiment of the present application may also include only some of the network elements shown in Figure 1.
  • the terminal is connected to the AMF through the N1 interface
  • the (R)AN is connected to the AMF through the N2 interface
  • the (R)AN is connected to the UPF through the N3 interface.
  • UPFs are connected to each other through the N9 interface, and UPF is interconnected with the DN through the N6 interface.
  • SMF controls UPF through the N4 interface.
  • FIG. 2 is another schematic diagram of a network architecture suitable for embodiments of the present application.
  • the architecture is a terminal-network-terminal architecture scenario.
  • This scenario can be a tactile Internet (TI).
  • TI tactile Internet
  • One terminal interfaces with the main domain tactile user and the artificial system, and the other end is remote controlled by the controlled domain.
  • Robot or remote operator, network transmission core network and access network include LTE, 5G or next-generation air interface 6G.
  • the main domain receives audio/video feedback signals from the controlled domain.
  • the main domain and the controlled domain are connected through two-way communication links on the network domain with the help of various commands and feedback signals, thus forming a global control loop.
  • FIG. 3 is another schematic diagram of a network architecture suitable for embodiments of the present application.
  • the architecture is a WiFi scenario.
  • the cloud server transmits XR media data or ordinary video to the terminal (XR device) through the fixed network, WiFi router/AP/set-top box.
  • the 5G communication system gradually penetrates into some real-time multimedia services, such as video transmission, Cloud gaming (CG), extended reality (XR), TI, etc., among which XR includes virtual reality (VR) and augmented reality (AR).
  • CG Cloud gaming
  • XR extended reality
  • AR augmented reality
  • QoS user quality of service
  • the QoS configuration of a QoS flow includes the following QoS parameters:
  • QoS configuration of each QoS flow will include QoS parameters: 5QI, ARP;
  • the QoS configuration of each Non-GBR QoS flow may also include parameters: Reflected Qos attributes (RQA);
  • QoS configuration of each GBR QoS flow will also include parameters: guaranteed flow bit rate (GFBR), maximum flow bit rate (MFBR);
  • the QoS configuration of each GBR QoS flow may also include: indication control and maximum packet loss rate.
  • QoS rules The UE performs classification and marking of uplink user plane data services, that is, it associates uplink data to the corresponding QoS flow according to QoS rules. These QoS rules may be explicitly provided to the UE (that is, explicitly configured to the UE through signaling during the PDU session establishment/modification process), or preconfigured on the UE, or the UE may be implicitly derived using the reflection QoS mechanism. QoS rules have the following characteristics:
  • a QoS rule includes: QFI of the associated QoS flow, packet filter set (a filter list), and priority;
  • a QoS flow can have multiple QoS rules
  • Each PDU session must be configured with a default QoS rule, and the default QoS rule is associated with a QoS flow.
  • the QoS requirements of application layer data may be different, so different QoS configurations need to be provided to achieve different QoS guarantee.
  • FIG. 4 is a schematic diagram of a layered transmission process of an XR service provided by an embodiment of the present application.
  • Layered coding transmits service data frames by outputting two layers of code streams, including base layer (BL) and enhancement layer (EL).
  • BL base layer
  • EL enhancement layer
  • XR video transmission can be divided in time, space, and quality, and output two-layer code streams.
  • the BL data frame can enable the decoder to decode the basic video content completely and ensure the basic experience of the UE.
  • the BL data frame usually has a small amount of data.
  • EL's data frame includes more detailed information and is used to improve video quality, and its data volume is large.
  • the two code streams are also transmitted separately, and different QoS (Quality of Service) guarantees are provided.
  • QoS Quality of Service
  • BL data packets and EL data packets will be configured with different QoS requirements ( In the 5G system, 5QI (5G Quality identity) is used for identification).
  • 5QI 5G Quality identity
  • the QoS configuration of BL data packets is 5QI-1
  • the QoS configuration of EL data packets is 5QI-1.
  • a group of picture GoP will be composed of multiple types of video frames.
  • the first frame in the GoP is an I frame (intra frame), which can contain multiple P frames (predicted frames) later.
  • the I frame is an intra-frame reference frame.
  • P frame is a predictive coding frame, usually with a small amount of data. It is used to represent the data that is different from the previous frame.
  • decoding it is necessary to superimpose the previously cached picture on the frame defined by this frame. Differentially generated images, errors have relatively little impact on video quality. Therefore, priority should be given to ensuring the transmission of I frames during transmission.
  • the QoS guarantee mechanism can provide QoS guarantee for the data transmission of the service flow.
  • FIG. 5 shows a schematic diagram of a QoS guarantee mechanism provided by an embodiment of the present application.
  • the QoS flow is controlled by the SMF network element of the core network, which can be pre-configured or established and modified through PDU sessions.
  • the characteristics of a QoS flow consist of three parts: QoS configuration on the AN side (QoS profile): These configurations are provided to the AN by the SMF through the N2 interface, or are pre-configured in the AN; QoS rules on the UE side: these Rules can be provided to the UE by the SMF through N1, or derived by the UE through the reflection QoS mechanism; uplink and downlink packet detection rules (PDR) on the UPF side: These PDR(s) are provided by the SMF through the N4 interface Give user plane function (UPF).
  • QoS configuration on the AN side QoS profile
  • QoS rules on the UE side these Rules can be provided to the UE by the SMF through N1, or derived by the UE through the reflection QoS mechanism
  • QoS Flow is the smallest granularity that distinguishes QoS.
  • the QoS flow identifier QFI
  • the service flows on the UE plane with the same QFI use the same service forwarding processing method (such as scheduling).
  • one PDU session can correspond to multiple radio bearers (RBs), and services on the same RB can also use different service levels; one RB can contain multiple QoS flows. , data placed on the same RB is not distinguished when transmitted on the access network device side.
  • XR services after the core network distributes data packets with different importance into two QoS flows, they may be carried on one RB on the access network equipment side. Therefore, two data packets with different importance are separated in the physical layer. The inability to distinguish during the transmission process results in the inability to provide appropriate transmission guarantees for data transmission of XR services, thus affecting the user experience.
  • this application provides a data transmission method to meet the transmission requirements of application layer data during physical layer transmission, thereby providing appropriate transmission guarantee for data transmission and further improving user experience.
  • Figure 6 is a schematic flow chart of a data transmission method provided by this application.
  • the access network equipment, terminal equipment and core network equipment are used as the execution subjects of the interactive indication as an example to illustrate the method, but this application does not limit the execution subjects of the interactive indication.
  • the access network device in Figure 6 can also be a chip, chip system, or processor that supports the methods that the access network device can implement, or it can also be a logical module that can realize all or part of the functions of the access network device.
  • the terminal device in Figure 6 can also be a chip, chip system or processor that supports the methods that the terminal device can implement, or it can also be a logic module or software that can realize all or part of the functions of the terminal device; in Figure 6
  • the core network equipment can also be a chip, chip system or processor that supports the methods that the core network equipment can implement, or it can be a logic module or software that can realize all or part of the functions of the core network equipment. It should be understood that the method 600 shown in Figure 6 can be used for downlink data transmission.
  • S610 The core network device sends QoS configuration information to the access network device.
  • the core network equipment may be an SMF network element.
  • the access network device when the access network device establishes a PDU session with the SMF network element, it establishes a QoS flow with synchronization association.
  • the SMF network element sends QoS configuration information to the access network device.
  • the QoS configuration information includes the first QoS identifier and second QoS identifier.
  • the core network device can obtain the importance information of the application layer XR service from the server.
  • the importance information includes the data packet of the XR service and the application layer
  • the type attribute of the data unit belongs to the basic layer/enhancement layer, I frame/P frame, or uses the unequal importance of different areas of the human eye's field of view (FOV) to perform natural stratification. For example, it can be divided into data within the field of view and data outside the field of view.
  • FOV field of view
  • the QoS configuration information may be a QoS configuration file.
  • the QoS configuration information may include a QoS configuration file for the first QoS data flow and a QoS configuration file for the second QoS data flow.
  • the QoS configuration information includes first QoS configuration information and second QoS configuration information.
  • the first QoS configuration information includes a QoS configuration file for the first QoS data flow
  • the second QoS configuration information includes a QoS configuration file for the second QoS data flow.
  • the QoS configuration file, the first QoS configuration information and the second QoS configuration information may be included in different messages and sent, or may be included in one message and sent. This is not limited in the embodiment of the present application.
  • the first QoS data flow and the second QoS data flow belong to the same data unit.
  • the first QoS data flow is the data flow after QoS flow mapping of the first data flow of the data unit
  • the second QoS data flow The flow is the data flow after QoS flow mapping of the second data flow of the data unit.
  • the first data flow is transmitted from the application server to the terminal device and can be called the first data flow when passing through each node. After the UPF performs QoS flow mapping, it can also be called the first QoS data flow.
  • the second data flow is transmitted from the application server to the terminal device and passes through each node, it can be called the second data flow. After the UPF performs QoS flow mapping, it can also be called the second QoS data flow.
  • the first data and the second data are data of the same service.
  • the transmitted data when the transmitted data is data in the video service or data in the XR service, the data unit can Consider a video frame, a video frame slice (slice), or a video frame tile (tile).
  • the data unit can also be an application data unit, a tactile multi-stream signal, a media unit or a protocol data unit.
  • the first QoS identifier indicates the QoS of the first QoS data flow
  • the second QoS identifier indicates the QoS of the second QoS data flow.
  • the first QoS identifier and the second QoS identifier may be 5QI.
  • the first QoS identifier and the second QoS identifier also indicate that the first QoS data flow and the second QoS data flow are respectively mapped to different access network resources.
  • the access network device receives QoS configuration information from the SMF network element, where the QoS configuration information includes the first QoS identifier and the second QoS identifier.
  • the first QoS identifier and the second QoS identifier indicate that the first QoS data flow and the second QoS data flow are respectively mapped to different radio bearers.
  • multiple 5QIs for example, the first QoS identifier and the second QoS identifier
  • the access network device establishes a QoS flow with synchronization association when establishing a PDU session with the core network element.
  • this process includes the SMF network element sending QoS configuration information to the access network device, including the multiple 5QIs.
  • the role of the multiple 5QIs can be understood as using the multiple 5QIs to mark different QoS transmission requirements (for example, QoS flows with different importance), therefore when a PDU session includes multiple 5QIs, it can be understood that the SMF network element instructs the access network device to map the QoS flows marked with multiple 5QIs to different access network resources.
  • the SMF network element instructs the access network device to map the multiple 5QI-marked QoS flows to different access network resources. It can be understood that the SMF network element requires the access network device to map the multiple 5QI-marked QoS flows respectively. Mapping to different access network resources can also be understood as the SMF network element recommends that the access network equipment maps the multiple 5QI marked QoS flows to different access network resources respectively.
  • the access network device when the SMF network element requires the access network device to map the multiple 5QI-labeled QoS flows to different access network resources, the access network device performs the mapping operation according to the requirements of the SMF. For another example, when the SMF network element recommends that the access network device maps the multiple 5QI-marked QoS flows to different access network resources, the access network device can perform the mapping operation according to the requirements of the SMF, or it can The mapping operation is not performed according to the requirements of SMF.
  • the access network device determines whether to use the radio bearer resources according to the SMF recommendations to perform mapping operations. For example, when the access network device determines that the radio bearer resources are sufficient, the access network device maps the multiple 5QI-marked QoS flows to different radio bearers; when the access network device determines that the radio bearer resources are limited, such as only one radio bearer, the access network device will not map the multiple 5QI-labeled QoS flows to different wireless bearers respectively.
  • the access network device may not map the multiple 5QI-labeled QoS flows to different radio bearers respectively.
  • the access network device receives the QoS configuration information, where the QoS configuration information includes multiple newly defined 5QIs, and the access network device can map the QoS flows marked by the multiple predefined 5QIs to different wireless bearers respectively.
  • the multiple 5QI-labeled QoS flows may also be mapped to certain wireless bearers according to the implementation of the access network equipment, which is not limited in the embodiments of the present application.
  • the predefined 5QI (for example, the first QoS identifier and the second QoS identifier) serve as instruction information from the core network device to the access network device, and the access network device can use the multiple QIs according to predefined rules.
  • Each 5QI-labeled QoS flow is mapped to different wireless bearers respectively. You can also implement your own implementation to map the multiple 5QI-labeled QoS flows to certain wireless bearers.
  • using the predefined 5QI when sending QoS configuration information , using the predefined 5QI to indicate, suggest, guide, or tend to the access network device's mapping of access network resources to the QoS flow marked by the predefined 5QI.
  • a new (predefined) 5QI is added to the attribute list of 5QI.
  • the values of the newly added 5QI are X1, X2, and X3.
  • the attribute list of 5QI is updated as follows: Table 1:
  • the predefined values are 5QI for X1, X2, and X3.
  • the X1, X2, and X3 use QoS flows that can identify different transmission requirements.
  • X1, represents specific transmission requirements and transmission methods (detailed introduction in Figure 7 in step S620 below).
  • X1 may identify the QoS flow of the base layer data frame
  • X2 may identify the QoS flow of the enhancement layer data frame
  • X3 may identify the QoS flow of the video data frame.
  • the base layer data frame can enable the decoder to decode the basic Video content ensures the basic experience of UE, EL's data frame includes more detailed information.
  • the two code streams can be transmitted separately and provide different QoS (Quality of Service) guarantees.
  • QoS Quality of Service
  • BL's data packet is configured with the X1-identified QoS data stream
  • EL's data The packet is configured with the QoS data flow identified by X2.
  • X1 and X2 define different QoS requirements.
  • the access network device performs scheduling, it determines the QoS requirements of X1 and The scheduling priority of the packet.
  • the QoS configuration information may include multiple QoS identifiers (that is, multiple 5QI identifiers are predefined to identify multiple QoS flows).
  • the multiple QoS flows may belong to the same application layer service, and the core network When UPF network elements and RAN transmit these QoS flows, they can ensure that the multiple QoS flows are transmitted synchronously as much as possible. In other words, the delay in transmitting the multiple QoS flows can be reduced as much as possible. This can also be understood as minimizing the transmission delay of the multiple QoS flows as much as possible.
  • the time interval between packets included in a QoS flow when the network is congested, the network can uniformly reject the transmission tasks of multiple QoS flows, thereby avoiding the waste of resources caused by sending some QoS flows that cannot satisfy the user experience.
  • S620 The access network device maps the first QoS data flow and the second QoS data flow to the first radio bearer and the second radio bearer respectively.
  • the access network device can map the predefined 5QI-identified QoS data flows to different wireless bearers for transmission, thereby providing different QoS guarantees.
  • the business importance of the first QoS data flow is higher than the business importance of the second QoS data flow.
  • the business importance of the first QoS data flow and the business importance of the second QoS data flow are determined based on at least one parameter such as priority, data delay, packet error rate, average window, and maximum data burst amount. .
  • the access network device may determine the business importance of the first QoS data flow based on the delay requirement of the first QoS data flow, and determine the business importance of the second QoS data flow based on the delay requirement of the second QoS data flow. Specifically, when the delay requirement of the first QoS data flow is higher than the delay requirement of the second QoS data flow, it can be determined that the business importance of the first QoS data flow is higher than the business importance of the second QoS data flow.
  • the access network device may determine the business importance of the first QoS data flow based on the packet error rate of the first QoS data flow, and determine the business importance of the second QoS data flow based on the packet error rate of the second QoS data flow. Specifically, when the packet error rate requirement of the first QoS data flow is lower than the packet error rate of the second QoS data flow, it can be determined that the business importance of the first QoS data flow is higher than that of the second QoS data flow. sex.
  • the access network device can determine the business importance of the data flow based on a specific parameter that can reflect the business importance, or can also determine the business importance based on multiple parameters. property, the embodiments of this application are not limited here.
  • the access network equipment can determine the modulation and coding of data stream transmission based on the QoS requirements of streams of different importance (such as corresponding bit error rates, delay requirements, etc.) and the channel conditions fed back by users.
  • scheme, MCS MCS order, allocated time-frequency resources, number of retransmissions and other configuration information, thereby providing different QoS guarantees and realizing transmission with unequal importance protection.
  • the first QoS identifier further indicates that the wireless bearer carrying the first QoS data flow only carries the first QoS data flow.
  • the access network device can map the QoS data flow identified by X1 to RB1, and RB1 can only carry the QoS data flow identified by X1.
  • the access network device can map the QoS data flow identified by X2 Flowing reflection It is transmitted to RB2, but RB2 can carry QoS flows without predefined 5QI identifiers.
  • the second QoS identifier further indicates that the radio bearer carrying the second QoS data flow only carries the second QoS data flow.
  • the access network device can map the QoS data flow identified by X2 to RB2, and RB2 can only carry the QoS data flow identified by X2.
  • the access network device can map the QoS data flow identified by X1 The flow is mapped to RB1, but RB1 can carry QoS flows without predefined 5QI identifiers.
  • the first QoS identifier also indicates that the wireless bearer carrying the first QoS data flow only carries the first QoS data flow
  • the second QoS identifier also indicates that the wireless bearer carrying the first QoS data flow only carries the first QoS data flow.
  • the radio bearer of the second QoS data flow only carries the second QoS data flow.
  • the access network device can map the QoS data flow identified by X1 to RB1, and RB1 can only carry the QoS data flow identified by X1.
  • the access network device can map the QoS data flow identified by X2 The flow is mapped to RB2, and RB2 can only carry the QoS data flow identified by X2.
  • the first QoS data stream and the second QoS data stream are only illustrative, and are not limited to the existence of only two QoS data streams.
  • multiple 5QIs may be defined to indicate transmission requirements, which is not limited in the embodiments of this application.
  • the QoS flow with the predefined 5QI identifier can be separately divided into a logical channel group when dividing the logical channel group.
  • the access network device sends the first QoS data stream and the second QoS data stream data to the terminal device through the first wireless bearer and the second wireless bearer respectively.
  • the access network device sends the data of the first QoS data flow to the terminal device through the first radio bearer, and the access network device sends the data of the second QoS data flow to the terminal device through the second radio bearer.
  • the access network device maps the QoS data flow to the wireless bearer
  • the QoS data flow needs to be further processed based on the wireless bearer before it can be sent to the terminal device.
  • the embodiments of this application do not impose any limitations on the further processing method of the QoS data flow based on the wireless bearer.
  • further processing of the QoS data stream based on the wireless bearer may include coding and modulation of the data packets in the QoS data stream, which is not limited in the embodiments of the present application.
  • the access network device can obtain the first QoS identifier and the second QoS identifier according to the QoS configuration information.
  • the first QoS identifier and the second QoS identifier require or recommend that the access network device will
  • the first QoS data flow and the second QoS data flow are respectively mapped to different radio bearers, and the first QoS data flow and the second QoS data flow are respectively mapped to the first radio bearer and the second radio bearer for transmission. to terminal equipment, thereby providing appropriate transmission guarantee for data transmission of XR services and improving user experience.
  • Figure 8 is another schematic flow chart of a data transmission method provided by this application.
  • the access network equipment, terminal equipment and core network equipment are used as the execution subjects of the interactive indication as an example to illustrate the method, but this application does not limit the execution subjects of the interactive indication.
  • the access network device in Figure 8 can also be a chip, chip system, or processor that supports the methods that the access network device can implement, or it can also be a logical module that can realize all or part of the functions of the access network device. or software;
  • the terminal device in Figure 8 can also be a chip, chip system or processor that supports the methods that the terminal device can implement, or it can also be a logic module or software that can realize all or part of the functions of the terminal device; in Figure 8
  • the core network equipment can also be a chip that supports the methods that the core network equipment can implement.
  • a chip system or processor can also be a logic module or software that can realize all or part of the core network equipment functions. It should be understood that the method 800 shown in Figure 8 can be used for downlink data transmission.
  • the core network device sends QoS configuration information to the access network device.
  • the manner in which the core network device sends QoS configuration information to the access network device is similar to S610 in method 600, and will not be described again here.
  • the QoS configuration information includes the QoS configuration file for the first QoS data flow.
  • the QoS configuration information includes the first QoS identifier.
  • the first QoS identifier indicates the QoS of the first QoS data flow, and the first QoS identifier also indicates that the access network resource carrying the first QoS data flow only carries the first QoS data flow.
  • a 5QI (for example, the first QoS identifier) is predefined, and the access network device establishes a QoS flow with synchronization association when establishing a PDU session with the core network element.
  • this process includes the SMF network element sending QoS configuration information to the access network device, including the 5QI.
  • the role of the 5QI can be understood as using the 5QI to mark the QoS transmission requirements (for example, the first QoS data flow (higher importance) QoS flow, so when a PDU session includes the 5QI, it can be understood that the SMF network element instructs the access network device to map the QoS flow marked by the 5QI to an access network resource alone. In other words, The access network resource only carries the unique QoS flow marked with the 5QI.
  • the SMF network element instructs the access network device to separately map the predefined 5QI-labeled QoS flow to an access network resource. It can be understood that the SMF network element requires the access network device to separately map the 5QI-labeled QoS flow to an access network resource.
  • An access network resource can also be understood as the SMF network element recommends that the access network device maps the 5QI marked QoS flow to an access network resource alone.
  • the access network device receives the QoS configuration information, where the QoS configuration information includes the predefined 5QI.
  • the access network device can map the QoS flows marked with multiple 5QIs to a wireless bearer individually, or can also map the QoS flows marked with multiple 5QIs to a wireless bearer according to the access network.
  • the implementation of the device maps the 5QI-labeled QoS flow to a certain radio bearer, which is not limited in the embodiments of the present application.
  • the QoS configuration information further includes a second QoS identifier, the second QoS identifier indicates the QoS of the second QoS data flow, and the second QoS identifier also indicates the second interface carrying the second QoS data flow. Incoming network resources only carry the second QoS data flow.
  • the QoS configuration information also includes the QoS configuration file for the second QoS data flow.
  • 5QI for example, the first QoS identifier and the second QoS identifier
  • 5QI the access network device establishes a QoS flow with synchronization association when establishing a PDU session with the core network element.
  • this process includes the SMF network element sending QoS configuration information to the access network device, including the 5QI.
  • the role of the 5QI can be understood as using the 5QI to mark the QoS transmission requirements (for example, the first QoS data flow The importance of the QoS flow is different from that of the second QoS flow).
  • a PDU session includes the 5QI
  • the SMF network element instructs the access network device to separate the two QoS flows marked by the 5QI. Mapping to two access network resources, in other words, these two access network resources only carry the QoS flow marked by the 5QI.
  • the SMF network element instructs the access network device to map the two QoS flows marked by the predefined 5QI to two access network resources separately. It can be understood that the SMF network element requires the access network device to map the two QoS flows marked by the 5QI. The two QoS flows are mapped to two access network resources separately. It can also be understood that the SMF network element recommends that the access network equipment maps the two QoS flows marked with the 5QI to two access network resources separately.
  • the access network device receives the QoS configuration information, where the QoS configuration information includes two predefined 5QI, the access network device can map the predefined 5QI-marked QoS flows to different wireless bearers separately, or can map the 5QI-marked QoS flows to a certain wireless bearer according to the implementation of the access network device.
  • This application The embodiment does not limit this.
  • the access network device maps the first QoS data flow to the first radio bearer, and sends the data of the first QoS data flow to the terminal device through the first radio bearer.
  • the access network device can map the predefined QoS data flow identified by 5QI to a wireless bearer for transmission, thereby providing different QoS guarantees.
  • the predefined 5QI may be X1 in Table 1.
  • the access network device can map the QoS data flow identified by X1 to RB1, and RB1 can only carry the QoS data flow identified by X1.
  • the QoS configuration information further includes a second QoS identifier, and the second QoS identifier further indicates that the second access network resource carrying the second QoS data flow only carries the second QoS data flow.
  • the predefined 5QI also includes X2 in Table 1.
  • the access network device can map the QoS data flow identified by X1 to RB1, and RB1 can only carry the QoS data flow identified by X1; the access network equipment can map the QoS data flow identified by QoS data flow.
  • the traffic importance of the first QoS data flow is higher than the traffic importance of the second QoS data flow.
  • the business importance of the first QoS data flow and the business importance of the second QoS data flow are determined based on at least one parameter such as priority, data delay, packet error rate, average window, and maximum data burst amount. .
  • the business importance of the first QoS data flow and the business importance of the second QoS data flow are determined based on at least one parameter such as priority, data delay, packet error rate, average window, and maximum data burst amount.
  • the first QoS data stream and the second QoS data stream are only illustrative, and are not limited to the existence of only two QoS data streams.
  • multiple 5QIs may be defined to indicate transmission requirements, which is not limited in the embodiments of this application.
  • the QoS flow with the predefined 5QI identifier can be separately divided into a logical channel group when dividing the logical channel group.
  • the access network device sends the data of the first QoS data flow to the terminal device through the first wireless bearer.
  • the access network device sends the corresponding data to the terminal device through the first wireless bearer carrying the only first QoS data flow.
  • the access network device also sends the corresponding data to the terminal device through the second wireless bearer carrying the only second QoS data flow.
  • the access network device maps the QoS data flow to the wireless bearer
  • the QoS data flow needs to be further processed based on the wireless bearer before it can be sent to the terminal device.
  • the embodiments of this application do not impose any limitations on the further processing method of the QoS data flow based on the wireless bearer.
  • the access network device can obtain the first QoS identifier according to the QoS configuration information.
  • the first QoS identifier requires or recommends that the access network device separately maps the first QoS data flow to a wireless bearer.
  • the QoS data flow data is sent to the terminal device through this wireless bearer, thereby providing appropriate transmission guarantee for the data transmission of XR services and improving user experience.
  • the integrity of application layer data needs to be considered during network transmission, so as to ensure the complete transmission of service data and ensure user experience.
  • one frame of the XR video can be divided into dozens of IP (Internet Protocol) packets, such as 50 IP packets, are transmitted to the fixed network/core network, and then the IP data packets are transmitted to the UE through the wireless access network.
  • IP Internet Protocol
  • the entire frame cannot be recovered. Therefore, during the transmission process, it is necessary to ensure that the IP packet of a picture frame is transmitted successfully as completely as possible.
  • it can also be performed in units of blocks (tiles) or slices (slices). Correspondingly, at this time, all IP packets of each block or slice need to be completely transmitted correctly.
  • this application provides a data transmission method that meets the integrity transmission requirements of application layer data during physical layer transmission, thereby providing appropriate transmission guarantee for data transmission and further improving user experience.
  • Figure 9 is another schematic flow chart of a data transmission method provided by this application.
  • the access network equipment, terminal equipment and core network equipment are used as the execution subjects of the interactive indication as an example to illustrate the method, but this application does not limit the execution subjects of the interactive indication.
  • the access network device in Figure 9 can also be a chip, chip system, or processor that supports the methods that the access network device can implement, or it can also be a logical module that can realize all or part of the functions of the access network device.
  • the terminal device in Figure 9 can also be a chip, chip system or processor that supports the methods that the terminal device can implement, or it can be a logic module or software that can realize all or part of the functions of the terminal device; in Figure 9
  • the core network equipment can also be a chip, chip system or processor that supports the methods that the core network equipment can implement, or it can be a logic module or software that can realize all or part of the functions of the core network equipment. It should be understood that the method 900 shown in Figure 9 can be used for downlink data transmission.
  • S910 The core network device sends QoS configuration information to the access network device.
  • the core network equipment may be an SMF network element.
  • the access network device when the access network device establishes a PDU session with the SMF network element, it establishes a QoS flow with synchronization association.
  • the SMF network element sends QoS configuration information to the access network device.
  • the QoS configuration information includes the third party. QoS identifier.
  • the core network device can obtain the ownership relationship between the application layer unit and the data packet of the XR service from the server.
  • the ownership relationship between the application layer unit and the data packet includes which data packets of the XR service are included in the application layer data unit.
  • packet group ID Packet Group ID
  • the QoS configuration information may be a QoS configuration file.
  • the QoS configuration information may include a QoS configuration file for the third QoS data flow.
  • the third QoS identifier indicates the QoS of the third QoS data flow, and the third QoS identifier also indicates that the data packet of the third QoS data flow is completely transmitted to the terminal device.
  • the third QoS identifier may be 5QI.
  • the process includes the SMF network element sending QoS configuration information, including the multiple 5QIs, to the access network device, and at the same time notifying the access network device of the relationship of the application unit data packet.
  • the function of the multiple 5QIs can be understood as using the multiple 5QIs to mark QoS flows with integrity transmission requirements. Therefore, when a PDU session includes the multiple 5QIs, it can be understood that the access network device can use the multiple 5QIs to mark the QoS flows with integrity transmission requirements.
  • the data packets of the QoS flow identified by 5QI are completely transmitted to the terminal device.
  • the data frame transmitted by this QoS flow It may include multiple data packets. Therefore, when scheduling on the access network side, multiple data packets corresponding to the data frame need to be fully scheduled before frame image decoding can be implemented on the terminal device.
  • the scheduling priority of the untransmitted data packet is increased. level to ensure that all data packets reach the receiving terminal in time to avoid the problem of being unable to decode the frame image due to incorrect transmission of one data packet, resulting in 49 invalid transmissions of data packets and a waste of air interface resources.
  • a new (predefined) 5QI is added to the attribute list of 5QI.
  • the values of the newly added 5QI are Y1, Y2, and Y3.
  • the attribute list of 5QI is updated as follows: Table 2:
  • the predefined values are 5QI for Y1, Y2, and Y3.
  • the Y1, Y2, and Y3 use QoS flows that can have transmission requirements, among which, Y1, Y2, and Y3 include "Note2" (Note 2) Indicates that the QoS data flows marked by Y1, Y2, and Y3 have integrity transmission requirements.
  • the access network device identifies Y1, Y2, and Y3, it can perform integrity transmission protection on the QoS flows identified by Y1, Y2, and Y3 based on the ownership relationship between the application layer unit and the data packet.
  • S920 The access network device completely transmits the data packet of the third QoS data stream to the terminal device.
  • the access network device identifies the third QoS identifier, determines the ownership relationship between the application layer unit of the third QoS data flow and the data packet, and completely transmits the data packet of the third QoS data flow to the terminal device.
  • the third QoS data flow is only an exemplary description and is not limited to the existence of only one QoS data flow.
  • 5QI to indicate transmission requirements, which is not limited in the embodiments of this application.
  • the access network device can obtain the third QoS identifier according to the QoS configuration information, and the access network device integrity transmits the data packet of the third QoS data flow marked by the third QoS identifier, and All data packets included in the application layer unit are completely sent to the terminal device, thereby providing appropriate transmission guarantee for data transmission of XR services and improving user experience.
  • the first identifier and the second identifier indicate that the first QoS flow and the second QoS flow are respectively mapped to different radio bearers.
  • the first QoS flow and/or the second QoS flow also have integrity transmission requirements.
  • This solution can be implemented by combining method 600 and method 900. The specific execution steps have been described in detail in the above-mentioned method 600 and method 900. For the sake of brevity, they will not be repeated here.
  • each network element such as a transmitting end device or a receiving end device, includes a corresponding hardware structure and/or software module for performing each function.
  • a network element such as a transmitting end device or a receiving end device
  • each network element includes a corresponding hardware structure and/or software module for performing each function.
  • the present application can be implemented in the form of hardware or a combination of hardware and computer software with the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein. Whether a function is performed by hardware or computer software driving the hardware depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each specific application, but such implementations should not be considered beyond the scope of this application.
  • Embodiments of the present application can divide the transmitting end device or the receiving end device into functional modules according to the above method examples.
  • each functional module can be divided corresponding to each function, or two or more functions can be integrated into one processing module. middle.
  • the above integrated modules can be implemented in the form of hardware or software function modules. It should be noted that the division of modules in the embodiment of the present application is schematic and is only a logical function division. In actual implementation, there may be other division methods. The following is an example of dividing each functional module using corresponding functions.
  • Figure 10 is a schematic block diagram of a communication device provided by this application. As shown in FIG. 10 , the communication device 1000 may include an interface unit 1010 and/or a processing unit 1020 .
  • the interface unit 1010 may also be called a transceiver unit, including a sending unit and/or a receiving unit.
  • the interface unit 1010 may be a transceiver (including a transmitter and/or a receiver), an input/output interface (including an input and/or output interface), a pin or a circuit, etc.
  • the interface unit 1010 may be used to perform the sending and/or receiving steps in the above method embodiment.
  • the processing unit 1020 may be a processor (which may include one or more), a processing circuit with processor functions, etc., and may be used to perform other steps except sending and receiving in the above method embodiments.
  • the communication device may also include a storage unit, which may be a memory, an internal storage unit (eg, register, cache, etc.), an external storage unit (eg, read-only memory, random access memory, etc.), etc. .
  • the storage unit is used to store instructions, and the processing unit 1020 executes the instructions stored in the storage unit, so that the communication device performs the above method.
  • the communication device 1000 may correspond to the access network device in the above methods 600, 800 and 900, and may perform the steps performed by the access network device or AN in the methods 600, 800 and 900. operate.
  • the interface unit 1010 is configured to receive quality of service QoS configuration information from the core network element.
  • the QoS configuration information includes a first QoS identifier and a second QoS identifier.
  • the first QoS identifier indicates the first QoS data.
  • the second QoS identifier indicates the QoS of the second QoS data flow
  • the first QoS identifier and the second QoS identifier also indicate that the first QoS data flow and the second QoS data flow are respectively mapped to Different wireless bearers
  • the processing unit 1020 is configured to map the first QoS data flow and the second QoS data flow to the first wireless bearer and the second wireless bearer respectively, and send the first QoS to the terminal device through the first wireless bearer.
  • the data of the data flow is sent to the terminal device through the second radio bearer.
  • the data of the second QoS data flow is sent to the terminal device.
  • the first QoS identifier further indicates that the radio bearer carrying the first QoS data flow only carries the first QoS data flow.
  • the second QoS identifier also indicates that the radio bearer carrying the second QoS data flow only carries the second QoS data flow.
  • the service importance of the first QoS data flow is higher than the service importance of the second QoS data flow.
  • the first QoS data flow and the second QoS data flow belong to the same data unit.
  • interface unit 1010 and the processing unit 1020 can also perform other operations performed by the access network device and AN in any of the above-mentioned methods 600, 800, and 900, which will not be described in detail here.
  • the communication device 1000 may correspond to the core network device in the above-mentioned methods 600, 800, and 900, and may perform operations performed by the core network device in the methods 600, 800, and 900.
  • the interface unit 1010 is configured to send quality of service QoS configuration information to the access network device.
  • the QoS configuration information includes a first QoS identifier and a second QoS identifier.
  • the first QoS identifier indicates the first QoS data.
  • QoS of the flow the second QoS identifier indicates the QoS of the second QoS data flow
  • the first QoS identifier and the second QoS identifier also indicate the first QoS data flow and the second QoS Data flows are mapped to different access network resources respectively.
  • interface unit 1010 and the processing unit 1020 can also perform other operations performed by the core network device in any of the above-mentioned methods 600, 800, and 900, which will not be described in detail here.
  • FIG. 11 is a structural block diagram of a communication device 1000 provided by an embodiment of the present application.
  • the communication device 1100 shown in FIG. 11 includes: a processor 1110, a memory 1120, and a transceiver 1130.
  • the processor 1110 is coupled to the memory 1120 and is used to execute instructions stored in the memory 1120 to control the transceiver 1130 to send signals and/or receive signals.
  • processor 1110 and the memory 1120 can be combined into one processing device, and the processor 1110 is used to execute the program code stored in the memory 1120 to implement the above functions.
  • the memory 1120 may also be integrated in the processor 1110 or independent of the processor 1110.
  • the processor 1110 can also communicate with the previous Corresponding to each processing unit in the communication device, the transceiver 1130 may correspond to each receiving unit and sending unit in the previous communication device.
  • the transceiver 1130 may include a receiver and a transmitter.
  • the transceiver may further include an antenna, and the number of antennas may be one or more.
  • the transceiver may also be a communication interface or interface circuit.
  • the communication device 1100 may correspond to the access network equipment and core network equipment in the methods 600, 800, and 900 according to the embodiments of the present application.
  • the communication device 1100 may include a unit of the method performed by the access network device in the method 600, the method 800, and the method 900, or may include a unit of the method performed by the core network device in the method 600, the method 800, and the method 900. It should be understood that the specific process of each unit performing the above corresponding steps has been described in detail in the above method embodiments, and will not be described again for the sake of brevity.
  • the chip When the communication device 1100 is a chip, the chip includes an interface unit and a processing unit.
  • the interface unit may be an input-output circuit or a communication interface;
  • the processing unit may be a processor, microprocessor, or integrated circuit integrated on the chip.
  • each step of the above method can be completed by instructions in the form of hardware integrated logic circuits or software in the processor.
  • the steps of the methods disclosed in conjunction with the embodiments of the present application can be directly implemented by a hardware processor for execution, or can be executed by a combination of hardware and software modules in the processor.
  • the software module can be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other mature storage media in this field.
  • the storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware. To avoid repetition, it will not be described in detail here.
  • the processor in the embodiment of the present application may be an integrated circuit chip with signal processing capabilities.
  • each step of the above method embodiment can be completed through an integrated logic circuit of hardware in the processor or instructions in the form of software.
  • the above-mentioned processor may be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components.
  • DSP digital signal processor
  • ASIC application-specific integrated circuit
  • FPGA field programmable gate array
  • a general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc.
  • the steps of the method disclosed in conjunction with the embodiments of the present application can be directly implemented by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor.
  • the software module can be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other mature storage media in this field.
  • the storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.
  • This application also provides a computer-readable medium on which a computer program is stored.
  • the computer program is executed by a computer, the functions of any of the above method embodiments are implemented.
  • This application also provides a computer program product, which implements the functions of any of the above method embodiments when executed by a computer.
  • the computer program product includes one or more computer instructions.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device.
  • the computer instructions may be stored in a computer-readable storage medium, Or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website, computer, server or data center through wires (such as coaxial cables, optical fiber, digital subscriber lines ( digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) to another website, computer, server or data center.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains one or more available media integrated.
  • the available media may be magnetic media (eg, floppy disk, hard disk, tape), optical media (eg, high-density digital video disc (DVD)), or semiconductor media (eg, solid state disk, SSD)) etc.
  • an embodiment means that a particular feature, structure, or characteristic associated with the embodiment is included in at least one embodiment of the present application. Therefore, various embodiments are not necessarily referred to the same embodiment throughout this specification. Furthermore, the particular features, structures or characteristics may be combined in any suitable manner in one or more embodiments.
  • the size of the sequence numbers of the above-mentioned processes does not mean the order of execution.
  • the execution order of each process should be determined by its functions and internal logic, and should not be used in the embodiments of the present application.
  • the implementation process constitutes any limitation.
  • the names of all nodes and messages in this application are only the names set by this application for the convenience of description.
  • the names in the actual network may be different. It should not be understood that this application limits the names of various nodes and messages. On the contrary, any names with and The names of nodes or messages with the same or similar functions used in this application are regarded as methods or equivalent replacements in this application, and are all within the protection scope of this application.
  • system and “network” are often used interchangeably herein.
  • network and/or in this article is just an association relationship that describes related objects, indicating that three relationships can exist. For example, A and/or B can mean: A exists alone, A and B exist simultaneously, and they exist alone. B these three situations.
  • At least one of! or "at least one of" herein refers to all or any combination of the listed items, for example, "at least one of A, B and C", It can mean: A exists alone, B exists alone, C exists alone, A and B exist simultaneously, B and C exist simultaneously, and A, B and C exist simultaneously. "At least one” in this article means one or more. "Multiple" means two or more.
  • B corresponding to A means that B is associated with A, and B can be determined based on A.
  • determining B based on A does not mean determining B only based on A.
  • B can also be determined based on A and/or other information.
  • the terms “including,” “includes,” “having,” and variations thereof all mean “including but not limited to,” unless otherwise specifically emphasized.
  • the disclosed systems, devices and methods can be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components may be combined or can be integrated into another system, or some features can be ignored, or not implemented.
  • the coupling or direct coupling or communication connection between each other shown or discussed may be through some interfaces, and the indirect coupling or communication connection of the devices or units may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or they may be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.
  • each functional unit in each embodiment of the present application can be integrated into one processing unit, each unit can exist physically alone, or two or more units can be integrated into one unit.
  • the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium.
  • the technical solution of the present application is essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product.
  • the computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of this application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program code. .

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  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente demande concerne un procédé de transmission de données et un appareil de communication. Le procédé comprend les étapes suivantes : un dispositif de réseau d'accès acquiert un premier identifiant de qualité de service (QoS) et un second identifiant de QoS à partir d'informations de configuration de QoS, le premier identifiant de QoS et le second identifiant de QoS indiquant qu'un premier flux de données de QoS et qu'un second flux de données de QoS sont respectivement mappés à différentes porteuses radio ; le dispositif de réseau d'accès mappe respectivement le premier flux de données de QoS et le second flux de données de QoS à une première porteuse radio et à une seconde porteuse radio, envoie des données du premier flux de données de QoS à un dispositif terminal au moyen de la première porteuse radio, et envoie des données du second flux de données de QoS au dispositif terminal au moyen de la seconde porteuse radio. Selon la solution de la présente demande, le dispositif de réseau d'accès peut distinguer avec précision des paquets de données présentant une importance différente dans un service XR, et une transmission présentant une importance différente est obtenue, ce qui facilite la planification raisonnable des priorités de paquets de données, et améliore en outre l'expérience de l'utilisateur.
PCT/CN2023/083272 2022-03-28 2023-03-23 Procédé de transmission de données et appareil de communication WO2023185608A1 (fr)

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