WO2020220943A1 - Système de communication et dispositif réseau - Google Patents

Système de communication et dispositif réseau Download PDF

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Publication number
WO2020220943A1
WO2020220943A1 PCT/CN2020/083516 CN2020083516W WO2020220943A1 WO 2020220943 A1 WO2020220943 A1 WO 2020220943A1 CN 2020083516 W CN2020083516 W CN 2020083516W WO 2020220943 A1 WO2020220943 A1 WO 2020220943A1
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Prior art keywords
network
configuration
function
network unit
layer
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PCT/CN2020/083516
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English (en)
Chinese (zh)
Inventor
曾清海
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华为技术有限公司
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Publication of WO2020220943A1 publication Critical patent/WO2020220943A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/14—Backbone network devices

Definitions

  • This application relates to the field of communication, and more specifically, to a communication system and network equipment.
  • the end-to-end transmission delay of the user plane required by industrial control should be less than 2 milliseconds (millisecond, ms).
  • the transmission delay of data from one terminal device to another terminal device is much longer than 2ms, which cannot meet the requirements of industrial control. Low latency requirements.
  • the present application provides a communication system and network equipment in order to reduce the transmission delay of data transmission.
  • a communication system may include: a first network unit and a second network unit.
  • the first network unit and the second network unit communicate through a communication interface, wherein the first network unit A network unit is used to implement: the user plane processing function corresponding to layer 1, the user plane processing function corresponding to layer 2, and the user plane processing function corresponding to the user plane function UPF; the second network unit is used to implement: the first wireless Resource control RRC function and core network function; wherein, the core network function includes one or more of the following: access and mobility management function AMF, session management function SMF, policy control function PCF, or authentication service function AUSF.
  • the network part can include a first network unit and a second network unit, which can not only realize the corresponding network functions, but also meet the requirements of industrial control and other vertical industries for low-time communication networks. Extend the requirements for reliability, low cost and rapid deployment.
  • the first network unit implements: the user plane processing function corresponding to layer 1, the user plane processing function corresponding to layer 2, and the user plane processing function corresponding to the user plane function UPF, so that when data is transmitted, such as data from a terminal device To another terminal device, through the first network unit, data can be quickly transmitted to another terminal device, avoiding the need to pass through the core network and then sending to another terminal device, so that low-latency transmission can be achieved, and it can support ultra Low-latency services.
  • the user plane processing function (handling) corresponding to layer 1 or layer 2 may include but not limited to one or more of the following: functions corresponding to the Service Data Adaptation Protocol (SDAP), packet data The functions corresponding to the convergence protocol (Packet Data Convergence Protocol, PDCP), the functions corresponding to the radio link control protocol (Radio Link Control, RLC), the functions corresponding to the media access control layer (MAC), or the physical layer ( physical layer, PHY) corresponding functions.
  • SDAP Service Data Adaptation Protocol
  • PDCP Packet Data Convergence Protocol
  • RLC Radio Link Control
  • MAC media access control layer
  • PHY physical layer
  • the user plane processing function corresponding to the user plane function UPF may include but not limited to one or more of the following: data to QoS flow, QoS flow to DRB mapping function, or data directly to DRB mapping function, etc. .
  • the first network element is further configured to implement a second RRC function
  • the second RRC function includes: configuring one or more of the following: special Cell configuration (special cell configuration, SpCellConfig), secondary cell configuration (SCell configuration, SCellConfig), radio link control configuration (RLC configuration, RLC-config), media intervention control layer cell group configuration (MAC-cell group configuration, MAC- cellGroupConfig), or physical cell group configuration (physical cell group config, PhysicalCellGroupConfig).
  • special Cell configuration special cell configuration
  • SCell configuration, SCellConfig secondary cell configuration
  • RLC configuration radio link control configuration
  • MAC-cell group configuration media intervention control layer cell group configuration
  • MAC-cellGroupConfig media intervention control layer cell group configuration
  • physical cell group configuration Physical cell group config, PhysicalCellGroupConfig
  • the first network element may perform (or process, execute, or configure) one or more of the following configurations: SpCellConfig, SCellConfig, RLC-config, MAC-cellGroupConfig, or PhysicalCellGroupConfig.
  • a special cell (SpCell, or may also be called a primary cell), if it is a primary base station or a master node (master node, MN), the primary cell can refer to a primary cell (primary cell, PCell); if it is a secondary base station Or secondary node (secondary node, SN), the primary cell may refer to a primary secondary cell (primary secondary cell, PSCell).
  • the second RRC function can be used to configure parameters related to one or more of the following functions: power control, random access, beam management, hybrid automatic repeat request HARQ, physical layer measurement, link adaptation, scheduling Request, uplink and downlink scheduling, rate matching, automatic retransmission request ARQ, discontinuous reception DRX.
  • the first network unit can be used for any one or more of the foregoing parameter configurations.
  • the SpCellConfig includes one or more of the following: cell or bandwidth part BWP related configuration, channel state indicator CSI measurement configuration, cross-carrier scheduling configuration, or rate matching Configuration;
  • the SCellConfig includes one or more of the following: cell or bandwidth part BWP related configuration, channel state indicator CSI measurement configuration, cross-carrier scheduling configuration, or rate matching configuration.
  • the first network unit may perform (or process, or perform) one or more of the following configurations: cell or BWP related configuration, CSI measurement configuration, cross-carrier scheduling configuration, or rate matching configuration.
  • the BWP-related configuration of the cell or bandwidth portion includes configuring one or more of the following parameters: center frequency, bandwidth, waveform, subcarrier bandwidth, frame structure, synchronization Signal block, or physical channel.
  • the first network unit can be configured with one or more of the following parameters: center frequency, bandwidth, waveform, subcarrier bandwidth, frame structure, synchronization signal block, or physical channel.
  • the physical channel includes: physical downlink shared channel (PDSCH), physical downlink control channel (physical downlink control channel, PDCCH), physical broadcast channel (physical broadcast channel, PBCH), physical random access channel (physical random access channel, PRACH), physical uplink shared channel (physical uplink shared channel, PUSCH), physical uplink control channel (physical uplink control channel, PUCCH).
  • PDSCH physical downlink shared channel
  • PDCCH physical downlink control channel
  • PBCH physical broadcast channel
  • PRACH physical random access channel
  • PRACH physical uplink shared channel
  • PUSCH physical uplink shared channel
  • PUCCH physical uplink control channel
  • the first RRC function includes: configuration: radio resource management, RRM measurement configuration and/or radio bearer configuration.
  • the second network unit may implement (or process, or execute): RRM measurement configuration and/or radio bearer configuration.
  • the first network unit performs part of the RRC function, and the second network unit performs another part of the RRC function, so that the system can quickly adapt to changes in the air interface radio link status and ensure air interface transmission performance.
  • the first RRC function and the second RRC function may be completely different or partly the same.
  • the functions may be flexibly deployed on the two units as required, and there is no strict limitation.
  • the radio bearer configuration includes, for example, configuring the SDAP and PDCP related parameters of the radio bearer, such as Radiobearerconfig and RRMmeasurementconfig in 3GPP TS38.331 v15.4.0.
  • the second network unit can configure UE-specific RRC process related parameters, for example, including but not limited to: RRM measurement, and/or radio bearer SDAP and PDCP related parameters, such as 3GPP TS38.331 v15. Radiobearerconfig and RRMmeasurementconfig in 4.0.
  • the layer 1 includes: a physical layer PHY; and/or, the layer 2 includes: a service data adaptation protocol SDAP layer, a packet data convergence protocol PDCP layer, Radio link layer control protocol RLC layer, media intervention control layer MAC layer.
  • the first network unit is further configured to implement the mapping of downlink data to a data radio bearer DRB.
  • the second network unit is also used to implement network capability opening and/or network data analysis functions.
  • the realization of the network capability opening function through the second network unit can facilitate vertical industry service providers or third-party application developers to manage, control, or obtain network information.
  • NWDAF network data analysis function
  • the first network unit is a local transmission unit LTU
  • the second network unit is a remote control unit RCU.
  • a communication system may include: the first network unit and the second network unit communicate through a communication interface, and the second network unit is configured to implement a first radio resource control RRC Function, the first network element is used to implement a second RRC function, where the second RRC function includes: configuring one or more of the following: special cell configuration SpCellConfig, secondary cell configuration SCellConfig, radio link control configuration RLC -config, media intervention control layer cell group configuration MAC-cellGroupConfig, or physical layer cell group configuration PhysicalCellGroupConfig; the first RRC function includes: configuration: radio resource management RRM measurement configuration and/or radio bearer configuration.
  • the second network unit may no longer implement this part of the RRC function (ie the second RRC function), that is, the RCU may implement the first RRC function. This allows the system to quickly adapt to changes in the air interface wireless link status and ensure air interface transmission performance.
  • the first network unit is further configured to implement the mapping of downlink data to a data radio bearer DRB.
  • the second network unit is also used to implement network capability opening and/or network data analysis related functions.
  • the SpCellConfig includes one or more of the following: cell or bandwidth part BWP related configuration, channel state indicator CSI measurement configuration, cross-carrier scheduling configuration, or rate matching Configuration;
  • the SCellConfig includes one or more of the following: cell or bandwidth part BWP related configuration, channel state indicator CSI measurement configuration, cross-carrier scheduling configuration, or rate matching configuration.
  • the first network unit may perform (or process, or perform) one or more of the following configurations: cell or BWP related configuration, CSI measurement configuration, cross-carrier scheduling configuration, or rate matching configuration.
  • the BWP-related configuration of the cell or bandwidth portion includes configuring one or more of the following parameters: center frequency, bandwidth, waveform, subcarrier bandwidth, frame structure, synchronization Signal block, or physical channel.
  • the physical channel includes: PDSCH, PDCCH, PBCH, PRACH, PUSCH, PUCCH.
  • the layer 1 includes: a physical layer PHY; and/or, the layer 2 includes: a service data adaptation protocol SDAP layer, a packet data convergence protocol PDCP layer, Radio link layer control protocol RLC layer, media intervention control layer MAC layer.
  • the first network unit is a local transmission unit LTU
  • the second network unit is a remote control unit RCU.
  • a network device may include a processor and a communication interface, where the processor is used to implement: a function corresponding to the service data adaptation protocol SDAP, a function corresponding to the packet data convergence protocol PDCP, and a wireless link
  • the communication interface is used to communicate with the target device.
  • the network equipment can realize: the user plane processing function corresponding to layer 1 (that is, the function corresponding to the physical layer PHY), the user plane processing function corresponding to layer 2 (that is, the function corresponding to the service data adaptation protocol SDAP, packet data aggregation
  • the function corresponding to the protocol PDCP, the function corresponding to the radio link layer control protocol RLC, the function corresponding to the media intervention control layer MAC), and the user plane processing function corresponding to the user plane function UPF so that when data is transmitted, such as data from a terminal Device to another terminal device, through the first network unit, data can be quickly transmitted to another terminal device, avoiding the need to pass through the core network and then send to another terminal device, so that low-latency transmission can be achieved, and support Ultra-low latency service
  • the processor further implements a second RRC function, and the second RRC function includes: configuring one or more of the following: special cell configuration SpCellConfig, Secondary cell configuration SCellConfig, radio link control configuration RLC-config, media intervention control layer cell group configuration MAC-cellGroupConfig, or physical layer cell group configuration PhysicalCellGroupConfig.
  • the SpCellConfig includes at least one or more of the following: cell or bandwidth part BWP related configuration, channel state indicator CSI measurement configuration, cross-carrier scheduling configuration, or rate Matching configuration;
  • the SCellConfig includes one or more of the following: cell or bandwidth part BWP related configuration, channel state indicator CSI measurement configuration, cross-carrier scheduling configuration, or rate matching configuration.
  • the cell or BWP related configuration includes configuring one or more of the following parameters: center frequency, bandwidth, waveform, subcarrier bandwidth, frame structure, synchronization signal block , Or physical channel.
  • the physical channel includes: PDSCH, PDCCH, PBCH, PRACH, PUSCH, PUCCH.
  • the processor is further configured to implement: downlink data to data radio bearer DRB mapping.
  • a network device may include a processor and a communication interface, where the processor is configured to implement: a first RRC function and a core network function, and the core network function includes one or more of the following Item: Access and mobility management function AMF, session management function SMF, policy control function PCF, or authentication service function AUSF, where the first RRC function includes: configuration: radio resource management RRM measurement configuration and/or radio bearer configuration ;
  • the communication interface is used to communicate with the target device.
  • the processor is also used to implement network capability opening and network data analysis related functions.
  • a data transmission method is provided, which may be executed by a network device, or may also be executed by a chip or circuit configured in the network device, which is not limited in this application.
  • the method may include: a first network device receives a data packet from a first terminal device; and the first network device routes the data packet to a destination address corresponding to the data packet.
  • the data can be quickly routed to the destination address, avoiding the need to route through the core network and then to the destination address corresponding to the data packet, so that the terminal device (for example, marked as the first Low-latency transmission between a terminal device) and other devices can support ultra-low-latency services.
  • the destination address corresponds to one or more of the following: a data network, a second terminal device, a network device where the second terminal device is located, and the first A local application of a network device, or a second network device.
  • the direct routing of the first network device data can be quickly routed to the data network, the second terminal device, the network device where the second terminal device is located, the local application of the first network device, or the second network device, etc.
  • One or more routes in the core network avoid the need to send to these devices through the core network, so that the terminal device (for example, the first terminal device) and the network device application or other terminal devices (for example, the second terminal device) can be realized.
  • the low-latency transmission between terminal devices can support ultra-low-latency services.
  • the first network device may also route the data packet to the second network device.
  • the second network device may route the data packet to the data network.
  • the second terminal device may include: a terminal device under the first network device, and/or, it may also be a terminal device under another network device.
  • the first network device may first route the data packet to other network devices, and then the other network device routes the data to the data network, and then transmits it to the second terminal device.
  • the first network device is used to implement: a user plane processing function corresponding to layer 1, a user plane processing function corresponding to layer 2, and a user plane function UPF corresponding The user plane processing function.
  • the user plane processing function corresponding to the layer 1 and the user plane processing function corresponding to the layer 2 include one or more of the following: functions corresponding to SDAP , PDCP corresponding function, RLC corresponding function, MAC corresponding function, or PHY corresponding function.
  • the second network device is used to implement the first RRC function
  • the first RRC function includes: configuration: radio resource management RRM measurement configuration and/or Radio bearer configuration.
  • the first network device is configured to implement a second radio resource control RRC function, where the second RRC function includes: configuring one or more of the following : Special cell configuration SpCellConfig, secondary cell configuration SCellConfig, radio link control configuration RLC-config, media intervention control layer cell group configuration MAC-cellGroupConfig, or physical layer cell group configuration PhysicalCellGroupConfig.
  • the second RRC function includes: configuring one or more of the following : Special cell configuration SpCellConfig, secondary cell configuration SCellConfig, radio link control configuration RLC-config, media intervention control layer cell group configuration MAC-cellGroupConfig, or physical layer cell group configuration PhysicalCellGroupConfig.
  • the SpCellConfig includes one or more of the following: cell or bandwidth part BWP related configuration, channel state indicator CSI measurement configuration, cross-carrier scheduling configuration, or rate matching Configuration;
  • the SCellConfig includes one or more of the following: cell or bandwidth part BWP related configuration, channel state indicator CSI measurement configuration, cross-carrier scheduling configuration, or rate matching configuration.
  • the BWP-related configuration of the cell or bandwidth portion includes configuring one or more of the following parameters: center frequency, bandwidth, waveform, subcarrier bandwidth, frame structure, synchronization Signal block, or physical channel.
  • the data packet is not processed by the service data adaptation protocol SDAP entity.
  • the method further includes: the first network device sets a quality of service QoS reflection function in the PDCP layer of the radio bearer RB corresponding to the data packet.
  • a data transmission method may include: a first network device receives a data packet from a terminal device; the first network device routes the data packet to a second network device; The second network device routes the data packet to the data network.
  • the first network device routing function module can forward the uplink data to the second network device through routing, and the second network device will The upstream data is routed to the data network.
  • the first network device is used to implement: a user plane processing function corresponding to layer 1, a user plane processing function corresponding to layer 2, and a user plane function UPF corresponding The user plane processing function.
  • the user plane processing function corresponding to the layer 1 and the user plane processing function corresponding to the layer 2 include one or more of the following: functions corresponding to SDAP , PDCP corresponding function, RLC corresponding function, MAC corresponding function, or PHY corresponding function.
  • the second network device is used to implement the first RRC function
  • the first RRC function includes: configuration: radio resource management RRM measurement configuration and/ Or wireless bearer configuration.
  • the first network device is configured to implement a second radio resource control RRC function, where the second RRC function includes: configuring one or more of the following Items: Special cell configuration SpCellConfig, secondary cell configuration SCellConfig, radio link control configuration RLC-config, media intervention control layer cell group configuration MAC-cellGroupConfig, or physical layer cell group configuration PhysicalCellGroupConfig.
  • the second RRC function includes: configuring one or more of the following Items: Special cell configuration SpCellConfig, secondary cell configuration SCellConfig, radio link control configuration RLC-config, media intervention control layer cell group configuration MAC-cellGroupConfig, or physical layer cell group configuration PhysicalCellGroupConfig.
  • the SpCellConfig includes one or more of the following: cell or bandwidth part BWP related configuration, channel state indicator CSI measurement configuration, cross-carrier scheduling configuration, or rate matching Configuration;
  • the SCellConfig includes one or more of the following: cell or bandwidth part BWP related configuration, channel state indicator CSI measurement configuration, cross-carrier scheduling configuration, or rate matching configuration.
  • the BWP-related configuration of the cell or bandwidth portion includes configuring one or more of the following parameters: center frequency, bandwidth, waveform, subcarrier bandwidth, frame structure, synchronization Signal block, or physical channel.
  • the data packet is not processed by the service data adaptation protocol SDAP entity.
  • the method further includes: the first network device sets a quality of service QoS reflection function in the PDCP layer of the radio bearer RB corresponding to the data packet.
  • a communication device including a processing unit and a communication unit, the communication unit is configured to receive a data packet from a first terminal device; the processing unit is configured to: send the data packet to the data packet The destination address route corresponding to the packet.
  • the destination address corresponds to one or more of the following: a data network, a second terminal device, a network device where the second terminal device is located, and the first A local application of a network device, or a second network device.
  • the processing unit is further configured to implement: a user plane processing function corresponding to layer 1, a user plane processing function corresponding to layer 2, and a user plane function corresponding to UPF User plane processing function.
  • the user plane processing function corresponding to the layer 1 and the user plane processing function corresponding to the layer 2 include one or more of the following: functions corresponding to SDAP , PDCP corresponding function, RLC corresponding function, MAC corresponding function, or PHY corresponding function.
  • the second network device is used to implement the first RRC function
  • the first RRC function includes: configuration: radio resource management RRM measurement configuration and/or Radio bearer configuration.
  • the processing unit is further configured to implement: a second radio resource control RRC function, where the second RRC function includes: configuring one or more of the following : Special cell configuration SpCellConfig, secondary cell configuration SCellConfig, radio link control configuration RLC-config, media intervention control layer cell group configuration MAC-cellGroupConfig, or physical layer cell group configuration PhysicalCellGroupConfig.
  • the second RRC function includes: configuring one or more of the following : Special cell configuration SpCellConfig, secondary cell configuration SCellConfig, radio link control configuration RLC-config, media intervention control layer cell group configuration MAC-cellGroupConfig, or physical layer cell group configuration PhysicalCellGroupConfig.
  • the SpCellConfig includes one or more of the following: cell or bandwidth part BWP related configuration, channel state indicator CSI measurement configuration, cross-carrier scheduling configuration, or rate matching Configuration;
  • the SCellConfig includes one or more of the following: cell or bandwidth part BWP related configuration, channel state indicator CSI measurement configuration, cross-carrier scheduling configuration, or rate matching configuration.
  • the BWP-related configuration of the cell or bandwidth part includes configuring one or more of the following parameters: center frequency, bandwidth, waveform, subcarrier bandwidth, frame structure, synchronization Signal block, or physical channel.
  • the data packet is not processed by the service data adaptation protocol SDAP entity.
  • the method further includes: the processing unit sets a quality of service QoS reflection function in the PDCP layer of the radio bearer RB corresponding to the data packet.
  • a communication device which has the function of implementing the first network unit of the first aspect or the second aspect.
  • These functions can be realized by hardware, or by hardware executing corresponding software.
  • the hardware or software includes one or more units corresponding to the above functions.
  • a communication device which has the function of implementing the second network unit of the first aspect or the second aspect.
  • These functions can be realized by hardware, or by hardware executing corresponding software.
  • the hardware or software includes one or more units corresponding to the above functions.
  • a communication device which has the function of realizing the network device of the third aspect.
  • These functions can be realized by hardware, or by hardware executing corresponding software.
  • the hardware or software includes one or more units corresponding to the above functions.
  • a communication device which has the function of realizing the network device of the fourth aspect.
  • These functions can be realized by hardware, or by hardware executing corresponding software.
  • the hardware or software includes one or more units corresponding to the above functions.
  • a communication device in a twelfth aspect, includes a memory, a communication interface, and a processor.
  • the memory is used to store computer programs or instructions.
  • the processor is coupled with the memory and the communication interface.
  • the computer program or instruction causes the device to perform the function of the first network unit of the first aspect or the second aspect.
  • a communication device in a thirteenth aspect, includes a memory, a communication interface, and a processor.
  • the memory is used to store computer programs or instructions.
  • the processor is coupled with the memory and the communication interface.
  • the computer program or instruction causes the device to perform the function of the second network unit of the first aspect or the second aspect.
  • a communication device in a fourteenth aspect, includes a memory, a communication interface, and a processor.
  • the memory is used to store computer programs or instructions.
  • the processor is coupled with the memory and the communication interface. When the processor executes the When a computer program or instruction is used, the device executes the function of the network device of the third aspect.
  • a communication device in a fifteenth aspect, includes a memory, a communication interface, and a processor.
  • the memory is used to store a computer program or instruction.
  • the processor is coupled with the memory and the communication interface.
  • the computer program or instruction enables the device to perform the function of the network device of the fourth aspect.
  • a communication device which includes a memory, a communication interface, and a processor.
  • the memory is used to store computer programs or instructions.
  • the processor is coupled with the memory and the communication interface. When the processor executes the When a computer program or instruction is used, the device executes the function of the first network device in the fifth aspect.
  • a computer program product comprising: computer program code, when the computer program code runs on a computer, the computer executes the first aspect of the first aspect or the second aspect. The function of the network unit.
  • a computer program product comprising: computer program code, when the computer program code runs on a computer, the computer executes the second aspect of the first aspect or the second aspect. The function of the network unit.
  • a computer program product comprising: computer program code, when the computer program code is run on a computer, the computer executes the function of the network device of the third aspect.
  • a computer program product comprising: computer program code, when the computer program code is run on a computer, the computer executes the function of the network device in the fourth aspect.
  • a computer program product includes: computer program code, which when the computer program code runs on a computer, causes the computer to execute the operation of the first network device in the fifth aspect.
  • a computer-readable storage medium stores a computer program.
  • the computer program When executed, it realizes the operation of the first network unit of the first aspect or the second aspect.
  • a computer-readable storage medium stores a computer program. When the computer program is executed, it realizes the operation of the second network unit in the first aspect or the second aspect.
  • a computer-readable storage medium stores a computer program, and when the computer program is executed, it realizes the function of the network device of the third aspect.
  • a computer-readable storage medium stores a computer program, and when the computer program is executed, the function of the network device of the fourth aspect is realized.
  • a computer-readable storage medium stores a computer program, and when the computer program is executed, it realizes the function of the first network device of the fifth aspect.
  • a communication system in a twenty-seventh aspect, includes the first network device and the second network device as described above.
  • Figure 1 is a schematic diagram of the 3GPP 5G system architecture
  • Figure 2 and Figure 3 are schematic diagrams of the NG-RAN architecture
  • Figure 4 is a schematic diagram of the air interface protocol stack distribution in the case where the CU is divided into CU-UP and CU-CP;
  • Fig. 5 is a schematic block diagram of a communication system according to an embodiment of the present application.
  • Fig. 6 is a schematic block diagram of still another communication system according to an embodiment of the present application.
  • Fig. 7 is a schematic block diagram of a network device according to an embodiment of the present application.
  • FIG. 8 is a schematic block diagram of another network device according to an embodiment of the present application.
  • FIG. 9 is a schematic interaction diagram of a terminal device access process applicable to an embodiment of the present application.
  • FIG. 10 is a schematic interaction diagram of data transmission applicable to an embodiment of the present application.
  • Figure 11 is a schematic diagram of the QoS framework defined by the existing 3GPP NR protocol
  • FIG. 12 is a schematic diagram of a PDCP PDU format applicable to an embodiment of the present application.
  • Fig. 13 is a schematic block diagram of a communication device according to an embodiment of the present application.
  • FIG. 14 is a schematic structural diagram of a communication device according to an embodiment of the present application.
  • Fig. 15 is another schematic structural diagram of a communication device provided according to an embodiment of the present application.
  • 5G 5th Generation
  • NR New Radio
  • the embodiments of the present application do not particularly limit the specific structure of the execution subject of the methods provided in the embodiments of the present application, as long as the methods provided in the embodiments of the present application can be executed, or the methods provided in the embodiments of the present application are recorded through operation.
  • the program of the code can be communicated according to the method provided in the embodiment of this application.
  • the execution subject of the method provided in the embodiments of the present application may be a terminal or a network device, or a functional module in the terminal device or the network device that can call and execute the program.
  • 3rd Generation Partnership Project 3rd Generation Partnership Project, 3GPP
  • 3GPP 3rd Generation Partnership Project
  • the network architecture may be a non-roaming architecture, for example.
  • the network architecture may specifically include the following network elements:
  • User equipment can refer to terminal equipment, access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile equipment, user terminal, terminal, wireless communication equipment, User agent or user device.
  • the terminal device can also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, a personal digital processing (Personal Digital Assistant, PDA), with wireless communication Functional handheld devices, computing devices, or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in the future 5G network, or future evolution of the public land mobile network (Public Land Mobile Network, PLMN) Terminal equipment, etc., this embodiment of the present application does not limit this.
  • SIP Session Initiation Protocol
  • WLL Wireless Local Loop
  • PDA Personal Digital Assistant
  • Access network Provides network access functions for authorized users in a specific area, and can use transmission tunnels of different qualities according to user levels and service requirements.
  • the access network may be an access network using different access technologies.
  • 3rd Generation Partnership Project 3rd Generation Partnership Project, 3GPP
  • 3GPP 3rd Generation Partnership Project
  • non-3GPP non-third-generation cooperation Partnership Project
  • the 3GPP access technology refers to the access technology that complies with the 3GPP standard specifications.
  • the access network that adopts the 3GPP access technology is called the radio access network (Radio Access Network, RAN).
  • the access network equipment in the 5G system is called Next generation Node Base station (gNB).
  • gNB Next generation Node Base station
  • a non-3GPP access technology refers to an access technology that does not comply with the 3GPP standard specifications, for example, an air interface technology represented by an access point (AP) in wifi.
  • AP access point
  • the access network that implements access network functions based on wireless communication technology can be called a radio access network (RAN), and the 5G radio access network of 3GPP can become the next generation radio access network.
  • RAN radio access network
  • NG-RAN next generation radio access network
  • the wireless access network can manage wireless resources, provide access services for the terminal, and complete the forwarding of control signals and user data between the terminal and the core network.
  • the wireless access network can be, for example, the Global System of Mobile Communications (GSM) system or the Base Station (BTS) in Code Division Multiple Access (Code Division Multiple Access, CDMA), or it can be a broadband code division multiple access network.
  • the base station (NodeB, NB) in the Wideband Code Division Multiple Access (WCDMA) system can also be the Evolutional NodeB (eNB or eNodeB) in the LTE system, or the Cloud Radio Access Network (Cloud Radio
  • the wireless controller in the Access Network (CRAN) scenario, or the network device may be a relay station, an access point, a vehicle-mounted device, a wearable device, and a network device in a future 5G network or a network device in a future evolved PLMN network.
  • the embodiment of the present application does not limit the specific technology and specific device form adopted by the radio access network device.
  • Access and mobility management function (AMF) entities mainly used for mobility management and access management.
  • Session management function (SMF) entity mainly used for session management, UE's Internet Protocol (IP) address allocation and management, etc.
  • IP Internet Protocol
  • User Plane Function (UPF) entity that is, the user plane gateway. It can be used for packet routing and forwarding, or quality of service (QoS) processing of user plane data, etc. User data can be connected to the data network (DN) through this network element.
  • DN data network
  • Data network A network used to provide data transmission.
  • DN Data network
  • An operator s business network, an Internet network, a third-party business network, etc.
  • Authentication server function authentication server function, AUSF
  • AUSF authentication server function
  • Network exposure function (NEF) entity used to safely open services and capabilities provided by 3GPP network functions to the outside.
  • Network storage function (NF) repository function (NRF) entity used to store network function entities and description information of the services they provide, and support service discovery, network element entity discovery, etc.
  • PCF Policy control function
  • Unified data management (UDM) entity used to process user identification, access authentication, registration, or mobility management, etc.
  • Application function (AF) entity used to route data affected by applications, access network open function network elements, or interact with policy frameworks for policy control, etc.
  • the N1 interface is the interface between the terminal and the AMF entity.
  • the N2 interface is an interface between AN and AMF entities, and is used to send non-access stratum (NAS) messages.
  • the N3 interface is the interface between the (R)AN and the UPF entity and is used to transmit user plane data.
  • the N4 interface is an interface between the SMF entity and the UPF entity, and is used to transmit information such as tunnel identification information of the N3 connection, data cache indication information, and downlink data notification messages.
  • the N6 interface is the interface between the UPF entity and the DN, and is used to transmit user plane data.
  • AMF entity, SMF entity, UPF entity, NSSF entity, NEF entity, AUSF entity, NRF entity, PCF entity, and UDM entity shown in Figure 1 can be understood as network elements used to implement different functions in the core network. , For example, can be combined into network slices on demand. These core network elements may be independent devices, or they may be integrated in the same device to implement different functions, which is not limited in this application.
  • the name of the interface between the various network elements in FIG. 1 is only an example, and the name of the interface in a specific implementation may be other names, which is not specifically limited in this application.
  • the name of the message (or signaling) transmitted between the various network elements is only an example, and does not constitute any limitation on the function of the message itself.
  • the core network device 103 for example, the fifth-generation core network 2 (the 5 th generation core network , 5GC), may be connected to the complete access network device 101, such as a GNB, may be connected includes a centralized unit ( Centralized Unit (CU) 201 and distributed unit (Distributed Unit, DU) 202 access network equipment 102.
  • CU Centralized Unit
  • DU distributed Unit
  • CU201 and DU202 can be softwareized or virtualized.
  • the wireless access network functions that need to be flexibly combined will run in CU201, for example, Service Data Adaptation Protocol (SDAP) layer, Packet Data Convergence Protocol (Packet Data Convergence Protocol) , PDCP), radio resource control (Radio Resource Control, RRC) and other high-level functions; and RAN functions that are strongly related to hardware and require high real-time performance will run in DU202, such as Radio Link Control Protocol (Radio Link Control, RLC) layer, physical layer (physical layer, PHY), media access control layer (Media Access Control, MAC) and other underlying functions.
  • SDAP Service Data Adaptation Protocol
  • RLC Radio Link Control Protocol
  • PHY physical layer
  • Media Access Control Media Access Control
  • CU201 and DU202 are connected through a communication interface.
  • the CU201 is also connected to the core network equipment through a communication interface.
  • the communication interface between the CU201 and the DU202 may be referred to as an F1 interface.
  • the interface between the CU201 and the core network device can be called an N2 interface or an NG interface.
  • one access network device 102 may include one CU201 and one or more DU202.
  • CU201 and DU202 are connected by F1 interface.
  • One DU202 can only be connected to one CU201, and one CU201 can be connected to one or more DU202.
  • the gNB may include one or more gNB-DUs and one gNB-CU.
  • One gNB-DU is connected to one gNB-CU, and one gNB-CU can be connected to multiple gNB-DUs.
  • the gNB-CU and the gNB-DUs it is connected to are seen by other gNBs and 5GCs as a gNB.
  • Figure 3 proposes a new architecture based on the architecture of Figure 2. That is, CU includes a centralized unit-user plane (CU-UP) 301 and a centralized unit-control plane (Centralized Unit-user plane, CU-UP) 301. -control plane,CU-CP)302.
  • the CU-UP301 and CU-CP302 can be on different physical devices. There may be an open interface between CU-UP301 and CU-CP302, and this interface may be called an E1 interface.
  • CU-UP301 and CU-CP302 and DU can each have their own interfaces. For example, the interface between CU-CP302 and DU can be called F1-C interface, and the interface between CU-UP301 and DU can be called F1. -U interface.
  • one access network device 102 may include one CU-CP302, one or more CU-UP302, and multiple DUs.
  • One DU can be connected to one CU-CP302.
  • One CU-UP301 can only connect to one CU-CP302.
  • One DU can be connected to multiple CU-UP301 under the control of the same CU-CP302.
  • One CU-UP301 can be connected to multiple DUs under the control of the same CU-CP302.
  • one gNB-DU and gNB-CU-UP are both connected to only one gNB-CU-CP.
  • one gNB-DU can be connected to multiple gNB-CU-UPs
  • one gNB-CU-UP can be connected to multiple gNB-DUs.
  • Fig. 4 is a schematic diagram of the air interface protocol stack distribution in the case where the access network equipment includes CU and DU, and further, in the CU part, the CU includes CU-UP and CU-CP.
  • the air interface protocol stack is RLC, MAC, PHY running in the DU part (such as gNB-DU), and PDCP and above protocol layers running in the CU part (such as gNB-CU) ).
  • RRC can implement air interface radio resources and air interface connection control
  • SDAP can perform quality of service (QoS)-flow (QoS-flow) and data radio bearer (DRB) mapping .
  • QoS-flow is a service data flow with specific QoS requirements. The functions of other protocol layers will not be repeated, and you can refer to the 3GPP protocol specifications. This application does not limit this.
  • Industrial control in the Industrial Internet has some requirements such as end-to-end ultra-reliable and low latency communication (URLLC), low cost, and rapid deployment.
  • the end-to-end delay required by industrial control is less than 2ms.
  • terminal device A may need to pass through the following nodes and the transmission interface between them: terminal device A ⁇ gNB -DU ⁇ gNB-CU (or gNB-CU-UP) ⁇ UPF ⁇ DN ⁇ UPF ⁇ gNB-CU (or gNB-CU-UP) ⁇ gNB-DU ⁇ terminal device B.
  • the access network equipment such as gNB
  • the access network equipment does not have the separation of CU/DU and CP/UP
  • the end-to-end transmission delay from terminal equipment to terminal equipment is far greater than 2ms, which cannot meet the low-latency requirements of industrial control.
  • the network nodes and functions in the current 3GPP 5G network are complex, resulting in high implementation costs.
  • the present application provides a network unit and network architecture, which can reduce time delay and save costs.
  • FIG. 5 is a schematic interaction diagram of a communication system 500 provided by an embodiment of the present application.
  • the communication system 500 may include a first network unit 510 and a second network unit 520.
  • the communication system 500 provided by the embodiment of the present application may be called a minimalist network architecture or a minimalist network system or a minimalist communication system.
  • the network part may include a first network unit 510 and a second network unit. 520, not only can realize the corresponding network function, but also can meet the needs of vertical industries such as industrial control for low latency, high reliability, low cost and rapid deployment of communication networks.
  • the first network unit 510 and the second network unit 520 may communicate through a communication interface.
  • the first network unit 510 is configured to implement: a user plane processing function corresponding to layer 1, a user plane processing function corresponding to layer 2, and a user plane processing function corresponding to UPF.
  • the second network unit 520 is configured to implement: a first RRC function and a core network function, where the core network function includes one or more of the following: AMF, SMF, PCF, or AUSF.
  • the first network unit 510 is used to implement: the second RRC function; the second network unit 520 is used to implement: the first RRC function.
  • the second RRC function includes: radio resource management RRM measurement configuration and/or radio bearer configuration.
  • the first RRC function includes configuring one or more of the following: special cell configuration (SCellConfig), secondary cell configuration (SCellConfig), radio link control configuration (RLC configuration, RLC) -config), media intervention control layer cell group configuration (MAC-cell group configuration, MAC-cellGroupConfig), or physical cell group configuration (physical cell group config, PhysicalCellGroupConfig).
  • SCellConfig special cell configuration
  • SCellConfig secondary cell configuration
  • RLC configuration, RLC radio link control configuration
  • MAC-cell group configuration media intervention control layer cell group configuration
  • MAC-cellGroupConfig media intervention control layer cell group configuration
  • physical cell group configuration physical cell group configuration
  • Physical cell group config PhysicalCellGroupConfig
  • a special cell SpCell, or can also be called a primary cell
  • the primary cell can refer to a primary cell (primary cell, PCell); if it is a secondary base station or secondary node, the primary cell can Refers to primary and secondary cell (PSCell).
  • first RRC function and the second RRC function may be partially the same or completely different.
  • the functions may be flexibly deployed on the two network elements as required, which is not strictly limited.
  • the first network unit 510 and the second network unit 520 described above are described in detail below.
  • the first network unit 510 may be used to implement all user plane processing functions.
  • the first network unit 510 can be used to implement all user plane processing functions.
  • the first network unit 510 can be used to implement user plane processing functions in the 3GPP Rel-15 5G system, or it can also be understood as:
  • the user plane control in the 3GPP Rel-15 5G system is centralized in one network unit, that is, the first network unit 510.
  • the first network unit 510 may be used to implement all user plane processing functions. During data transmission, when data is transmitted from one device to another, the first network unit 510 performs the user plane processing functions involved in the data transmission process, avoiding the need for data to pass through multiple network elements to achieve the goal Therefore, the user plane data transmission and processing delay can be reduced.
  • An existing transmission process is: the data from a terminal device is first transmitted from the DU to the CU, then transmitted from the CU to the UPF, and then transmitted to another terminal device.
  • the embodiments of this application take into account the transmission delay of the network units, such as the transmission delay from DU to CU and the transmission delay from CU to UPF, etc., and the user plane control (or user plane processing) of these network units can be controlled.
  • Centralized to the first network unit 510 that is, the first network unit 510 performs user plane processing functions.
  • data from a terminal device can be transmitted to the first network unit 510 first, and the first network unit 510 will The data is transmitted to another terminal device, so that rapid transmission from one terminal device to another terminal device can be realized through the first network unit 510, and the processing time delay of the data passing through each network unit can be saved.
  • the first network unit 510 is configured to implement: a user plane processing function corresponding to layer 1, a user plane processing function corresponding to layer 2, and a user plane processing function corresponding to the user plane function UPF.
  • the user plane processing function (handling) corresponding to layer 1 or layer 2 may include but not limited to one or more of the following: SDAP corresponding function, PDCP corresponding function, RLC corresponding function, MAC corresponding Function, or PHY corresponding function.
  • the first network unit 510 may be used to implement functions corresponding to SDAP.
  • the functions corresponding to SDAP may include, but are not limited to: mapping between QoS flows and data radio bearers, and/or in downlink data packets and uplink data packets. Mark the QoS flow indicator (QoS flow indicator, QFI), etc.
  • the first network unit 510 may be used to implement functions corresponding to PDCP, and the functions corresponding to PDCP may include, for example, one or more of the following: data transmission, encryption and decryption, integrity protection and verification, use of robust header compression (robust header compression, ROHC) protocol header compression and decompression, timer-based service data unit (service data unit, SDU) discarding, split bearer routing, duplication, reordering and order delivery, Out of order delivery, or repeated packet discarding, etc.
  • robust header compression robust header compression, ROHC protocol header compression and decompression
  • timer-based service data unit service data unit, SDU
  • split bearer routing duplication
  • reordering and order delivery reordering and order delivery
  • Out of order delivery or repeated packet discarding
  • the first network unit 510 may be used to implement functions corresponding to RLC.
  • the functions corresponding to RLC may include, for example, one or more of the following: upper-layer PDU transmission, sequence numbering, and automatic repeat request (ARQ) Perform error correction, RLC SDU segmentation and re-segmentation, reassembly of SDU, duplicate detection, RLC SDU discard, RLC reconstruction, or protocol error detection, etc.
  • ARQ automatic repeat request
  • the first network unit 510 may be used to implement MAC-corresponding functions, and the MAC-corresponding functions may include, for example, one or more of the following: mapping between logical channels and transport channels, multiplexing and demultiplexing of MAC SDU, Scheduling information report, error correction through HARQ, priority processing between terminal devices through dynamic scheduling, priority processing between logical channels of a terminal device through logical channel priority sorting, or MAC PDU filling, etc.
  • the first network unit 510 may be used to implement the functions corresponding to the PHY.
  • the functions corresponding to the PHY may include, for example, one or more of the following: transport block CRC attachment, channel coding, physical layer HARQ process, rate matching, scrambling ( scrambling), error detection on the transmission channel, modulation and demodulation of the physical channel, radio frequency processing, or multiple input multiple output antenna processing, etc.
  • the user plane processing function corresponding to the UPF includes a routing function (routing).
  • the first network unit 510 may also be used to implement a routing function. Routing functions, such as including but not limited to one or more of the following: packet routing and forwarding, packet inspection, user plane part of policy rule enforcement, user plane QoS processing, data to QoS flow mapping function, or data directly to DRB mapping function (if SDAP is not configured or SDAP layer is not configured with this function), etc.
  • the UPF during the transmission of downlink data from the UPF to the base station, the UPF will map the downlink data to the QoS flow, and realize the differential processing by distinguishing the downlink data of different QoS flows with different scheduling priorities. Transmission performance requirements for high-priority QoS flows.
  • the first network unit 510 can implement the UPF function and the user plane processing function. In other words, there is no UPF to base station transmission process. Therefore, through the embodiments of the present application, the mapping of downlink data to DRB can be directly implemented in the first network unit 510, that is, it can be understood that the mapping of downlink data to QoS flow is cancelled or not.
  • the first network unit 510 may implement the mapping of downlink data to DRB, and hand the downlink data to the PDCP layer corresponding to the DRB. Therefore, the data may not be processed by the SDAP layer, that is, in the embodiment of the present application, the SDAP The layer can be configured or not. This will be explained in detail below.
  • the first network unit 510 may be used to configure one or more of the following: SpCellConfig, SCellConfig, RLC-config, MAC-cellGroupConfig, or PhysicalCellGroupConfig.
  • the first network unit 510 may be used to perform one or more of the following processes, or in other words, the first network unit 510 may be used to perform one or more of the following operations: SpCellConfig, SCellConfig, RLC-config, MAC -cellGroupConfig, or PhysicalCellGroupConfig.
  • the second RRC function includes: configuring parameters related to one or more of the following functions: power control, random access, beam management, hybrid automatic repeat request HARQ, physical layer measurement, link adaptation, scheduling request , Uplink and downlink scheduling, rate matching, automatic retransmission request ARQ, or discontinuous reception DRX.
  • SpCellConfig includes one or more of the following: cell or bandwidth part (bandwidth part, BWP) related configuration, channel state indicator CSI measurement configuration, cross-carrier scheduling configuration, or rate matching configuration.
  • BWP bandwidth part
  • SCellConfig includes one or more of the following: cell or BWP related configuration, channel state indication CSI measurement configuration, cross-carrier scheduling configuration, or rate matching configuration.
  • the cell or BWP related configuration includes configuring one or more of the following parameters: center frequency, bandwidth, waveform, subcarrier bandwidth, frame structure, synchronization signal block, or physical channel.
  • the second network unit 520 may be used to implement the first RRC function and the core network function.
  • the second network unit 520 is used to implement the first RRC function.
  • the second network unit 520 is used to implement the L3 control plane function; for another example, the second network unit 520 is used to implement RRC functions other than the second RRC function. Function;
  • the second network unit 520 is used to implement RRM measurement configuration and/or radio bearer configuration.
  • the radio bearer configuration includes, for example, configuring the SDAP and PDCP related parameters of the radio bearer, such as Radiobearerconfig and RRMmeasurementconfig in 3GPP TS38.331 v15.4.0.
  • the first network unit 510 in the communication system 500 implements the second RRC function
  • the second network unit 520 in the communication system 500 can no longer implement these RRC functions, that is, the second network unit 520 can implement the second RRC function.
  • An RRC function such as being responsible for the configuration and reconfiguration of other functions. This allows the system to quickly adapt to changes in the air interface wireless link status and ensure air interface transmission performance.
  • the core network functions implemented by the second network unit 520 include one or more of the following: functions corresponding to AMF, functions corresponding to SMF, functions corresponding to PCF, or functions corresponding to AUSF.
  • the second network unit 520 is used to implement functions corresponding to AMF.
  • the functions corresponding to AMF may include, for example, the functions of the mobility management entity (MME) of 3GPP EPS other than session management, such as registration management, connection management, reachability management, mobility management, and legality. Monitoring, or access authorization (or authentication) and other functions.
  • MME mobility management entity
  • 3GPP EPS 3GPP EPS
  • the second network unit 520 is used to implement a function corresponding to SMF.
  • the functions corresponding to the SMF may include, for example, one or more of the following: session management, UE IP address allocation and management, selection and management of user plane functions, policy control, or terminal point of charging function interface, and downlink data notification.
  • the second network unit 520 is used to implement the function corresponding to the PCF.
  • the functions corresponding to the PCF may include, for example, a unified policy framework that guides network behavior, and/or providing policy rule information for control plane function network elements (such as AMF, SMF network elements, etc.).
  • the second network unit 520 is used to implement functions corresponding to AUSF, for example, it may include user authentication.
  • the second network unit 520 may also be used to implement network capability opening and network data analysis related functions.
  • standard API interfaces can be used to provide vertical industry service providers or third-party application developers with the most simplified network management and control functions, simplify network management, and enable network intelligence.
  • the second network unit 520 may be used to implement a network capability opening function.
  • Implementing the NEF function through the second network unit 520 can facilitate vertical industry service providers or third-party application developers to manage, control, or obtain network information.
  • the second network unit 520 is used to implement network data analysis related functions.
  • the network data analysis function (NWDAF) is implemented through the second network unit 520, and data collection and big data analysis can be performed in the second network unit 520, thereby making the network intelligent.
  • the second network unit 520 may also be used to implement a routing function.
  • the first network unit 510 may be a local transmission unit (LTU), and the second network unit 520 may be a remote control unit (RCU).
  • LTU local transmission unit
  • RCU remote control unit
  • first network unit 510 can all be replaced by LTU
  • second network unit 520 can all be replaced by RCU.
  • LTU and RCU are only a kind of naming and do not limit the protection scope of the embodiments of the present application.
  • the embodiments of the present application do not rule out the possibility of adopting other names in 5G networks and other networks in the future.
  • the network part can include a first network unit and a second network unit, which can not only realize the corresponding network functions, but also simplify the network nodes and functions to avoid excessive Multiple network nodes and overly complex interfaces can meet the requirements of industrial control and other vertical industries for low latency, high reliability, low cost, and rapid deployment of communication networks.
  • the first network unit implements: the user plane processing function corresponding to layer 1, the user plane processing function corresponding to layer 2, and the user plane processing function corresponding to the user plane function UPF, so that when data is transmitted, such as data from a terminal device Transmission to another terminal device, through the first network unit, data can be quickly transmitted to another terminal device, avoiding the need to pass through the core network and then send to another terminal device, so that low-latency transmission can be achieved, and support Ultra-low latency business.
  • first network unit 510 as an LTU
  • second network unit as an RCU
  • FIG. 6 is a schematic interaction diagram of a communication system 600 provided by an embodiment of the present application.
  • the communication system 600 may include LTU and RCU.
  • LTU local area network
  • RCU remote control unit
  • the LTU is equivalent to the first network unit 510 in the communication system 500
  • the RCU is equivalent to the second network unit 520 in the communication system 500.
  • the LTU and the RCU can communicate through an interface.
  • LTU is used to realize: the user plane processing function corresponding to layer 1, the user plane processing function corresponding to layer 2, and the user plane processing function corresponding to UPF;
  • RCU is used to realize: the first RRC function and core Net function.
  • LTU can be used to implement: L1 and/or L2 user plane functions, such as shown in Figure 6: SDAP corresponding function, PDCP corresponding function, RLC corresponding function, MAC corresponding function, PHY corresponding function, The LTU can also be used to implement: the user plane processing function corresponding to the UPF (ie, the routing function).
  • L1 and/or L2 user plane functions such as shown in Figure 6: SDAP corresponding function, PDCP corresponding function, RLC corresponding function, MAC corresponding function, PHY corresponding function
  • the LTU can also be used to implement: the user plane processing function corresponding to the UPF (ie, the routing function).
  • LTU is used to configure one or more of the following: SpCellConfig, SCellConfig, RLC-config, MAC-cellGroupConfig, or PhysicalCellGroupConfig;
  • RCU is used to implement: In addition to the above-mentioned SpCellConfig, SCellConfig, RLC- Functions other than config, MAC-cellGroupConfig, or PhysicalCellGroupConfig.
  • SpCellConfig SCellConfig, RLC-config, MAC-cellGroupConfig, or PhysicalCellGroupConfig, refer to the description in the embodiment of FIG. 5, which will not be repeated here.
  • the RCU can be used to implement the connection control function, that is, the air interface layer 3 control plane function (such as the first RRC function).
  • the RCU can also include core network functions (or essential functions of the core network). For example, the functions corresponding to AMF, the functions corresponding to SMF, the functions corresponding to PCF, the functions corresponding to AUSF, etc. shown in FIG. 6.
  • the LTU can also be used to implement the second RRC function.
  • the LTU can be used to configure one or more of the following: SpCellConfig, SCellConfig, RLC-config, MAC-cellGroupConfig, or PhysicalCellGroupConfig to achieve air interface Quick response to changes. In this case, the RCU no longer implements these RRC functions.
  • RCU can also be used to implement one or more of the following functions: UPF routing function, NEF, or NWDAF.
  • the RCU when the RCU includes the routing function of the UPF, it can help the LTU to route the data packet to the external network or another LTU when the LTU does not have a direct external user plane interface.
  • the RCU includes the NEF function
  • the RCU includes the NWDAF function
  • data information collection and big data analysis can be performed in the RCU, enabling network intelligence.
  • the mobile network is connected to the data network (DN) through the RCU, and the LTU may not be directly connected to the DN, and operations such as data forwarding may also be implemented through the interface to the DN and/or LTU.
  • DN data network
  • LTU may not be directly connected to the DN, and operations such as data forwarding may also be implemented through the interface to the DN and/or LTU.
  • the RCU also has an interface with other network equipment (such as gNB or gNB and other standard access network nodes (such as LTE standard eNB)). If other network devices are also in the LTU and RCU architecture, the two RCUs can be connected through the interface.
  • other network equipment such as gNB or gNB and other standard access network nodes (such as LTE standard eNB)
  • the network architecture provided by the embodiments of the present application can not only reduce network deployment costs and achieve rapid network deployment, but also, LTU can implement the second RRC function, for example, the LTU can be responsible for the configuration and reconfiguration process of the radio bearer;
  • the RCU implements other RRC functions (such as the first RRC function).
  • the RCU can be responsible for the configuration and reconfiguration process of other RRC functions, which not only enables the system to quickly adapt to changes in the air interface radio link status, and ensure air interface transmission Performance, and within the range of multiple LTUs managed by the RCU, a set of RRC configurations such as a set of cells and RRM can be uniformly adopted, which can avoid frequent reconfiguration due to the movement of terminal equipment and reduce air interface signaling.
  • FIG. 7 is a schematic block diagram of a network device 700 according to an embodiment of the present application.
  • the network device 700 is equivalent to the first network unit 510 in the aforementioned communication system 500.
  • the network device 700 may include a processing unit 710 and a communication unit 720.
  • the communication unit 720 can communicate with the outside, and the processing unit 710 can be used for data processing.
  • the communication unit 710 may also be referred to as a communication interface or a transceiving unit.
  • each unit can be implemented in the form of hardware or software function modules. It should also be understood that the division of units in the embodiments of the present application is illustrative, and is only a logical function division, and other division methods may be used in actual implementation. There is no restriction on this.
  • the processing unit 710 is configured to implement: the user plane processing function corresponding to layer 1, the user plane processing function corresponding to layer 2, and the user plane processing function corresponding to the user plane function UPF; the communication unit 720 is used to communicate with the target device.
  • the target device may include a terminal device or other network devices.
  • processing unit 710 is further configured to configure one or more of the following: SpCellConfig, SCellConfig, RLC-config, MAC-cellGroupConfig, or PhysicalCellGroupConfig.
  • processing unit 710 is further configured to implement: mapping of downlink data to a data radio bearer DRB.
  • all user plane processing functions such as L1/L2 data processing and data routing functions, are realized by the network device 700, so that when the target address of the data to be transmitted is the local application of the network device 700 or other terminal devices (such as network equipment) 700), direct routing through the network device 700 can quickly route data to the destination address, avoiding the need to pass through the core network and then send to the local application of the network device 700 or other terminal devices under the network device 700 In this way, low-latency transmission between the terminal device and the network device 700 application or other terminal devices can be implemented, and ultra-low-latency services can be supported.
  • L1/L2 data processing and data routing functions are realized by the network device 700, so that when the target address of the data to be transmitted is the local application of the network device 700 or other terminal devices (such as network equipment) 700), direct routing through the network device 700 can quickly route data to the destination address, avoiding the need to pass through the core network and then send to the local application of the network device 700 or other terminal devices under the network device 700 In this way, low-latency transmission
  • FIG. 8 is a schematic block diagram of a network device 800 provided by an embodiment of the present application.
  • the network device 800 is equivalent to the second network unit 520 in the aforementioned communication system 500.
  • the network device 800 may include a processing unit 810 and a communication unit 820.
  • the communication unit 820 can communicate with the outside, and the processing unit 810 can be used for data processing.
  • the communication unit 810 may also be referred to as a communication interface or a transceiving unit.
  • each unit can be implemented in the form of hardware or software function modules. It should also be understood that the division of units in the embodiments of the present application is illustrative, and is only a logical function division, and other division methods may be used in actual implementation. There is no restriction on this.
  • the processing unit 810 is used to implement: the first RRC function and the core network function; the communication unit 820 is used to communicate with the target device.
  • the target device may include a terminal device or other network devices.
  • the first RRC function includes: configuration: RRM measurement configuration and/or radio bearer configuration.
  • processing unit 810 is further configured to implement network capability opening and network data analysis related functions.
  • the core network function includes one or more of the following: access and mobility management function AMF, session management function SMF, policy control function PCF, or authentication service function AUSF.
  • FIG. 8 It should also be understood that the configuration and parameters involved in FIG. 8 can be referred to the description of the embodiment in FIG. 5, which will not be repeated here.
  • each functional module or unit may be divided corresponding to each function, or two or two
  • the above functions are integrated in a processing module or unit.
  • the above-mentioned integrated modules or units can be implemented in the form of hardware or software functional modules. It should be noted that the division of modules or units in the embodiments of the present application is illustrative, and is only a logical function division, and there may be other division methods in actual implementation.
  • Fig. 9 is a schematic interaction diagram of a terminal device access process applicable to an embodiment of the present application.
  • Figure 9 may include the following steps.
  • the first network unit sends an interface establishment request message to the second network unit.
  • the first network unit may be an LTU
  • the second network unit may be an RCU
  • first network unit in the embodiment of the present application is equivalent to the first network unit 510 or network device 700 in the above embodiment
  • second network unit is equivalent to the second network unit 520 or network device in the above embodiment.
  • device 800 reference may be made to the description of the above embodiments for details, and details are not described herein again.
  • the following takes the first network unit and the second network unit as an example for exemplification.
  • the first network unit sends a setup request (setup request) message to the second network unit.
  • the interface establishment request message may include: the identity of the first network unit and the list information of the subordinate cells of the first network unit.
  • the form of the identity of the first network unit may be, for example, the identity (ID) of the first network unit, the index of the first network unit (index), or the name of the first network unit, etc.
  • the first network unit sends an interface establishment request message to the second network unit. Accordingly, the second network unit receives the interface establishment request message and feeds it back to the first network unit.
  • the second network unit feeds back to the first network unit to establish a response message.
  • the second network unit After the second network unit receives the interface establishment request message of the first network unit, it can learn some information related to the first network unit according to the parameters carried in the message, so that it can make decisions such as selection of the first network unit for subsequent communication Provide input.
  • the interface establishment request message includes: the identification information of the first network unit and the cell list information of the first network unit.
  • the second network unit can learn the identity of the first network unit and its affiliation. Cell list information.
  • the second network unit feeds back an interface setup response (setup response) message to the first network unit.
  • the setup response message contains content similar to the content contained in the F1 setup response message.
  • the interface establishment response message may include information about the activated cell list and system information.
  • the interface establishment response message may also include information such as a list of available public land mobile networks (PLMN) and radio access network (RAN) area codes.
  • PLMN public land mobile networks
  • RAN radio access network
  • the RAN area code can be used to identify which RAN area the first network element or the cell subordinate to the first network element belongs to, so that a terminal device in the RRC inactive (RRC_INACTIVE) state can determine whether to initiate RRC according to the RAN area code Connection restoration process.
  • the first network unit After receiving the interface establishment response message, the first network unit can learn information such as a list of activatable cells, a list of available PLMNs, and system information according to the interface establishment response message. After learning the information, the first network unit can broadcast system information on the air interface.
  • the terminal device initiates a random access procedure to the first network unit.
  • the terminal device After the terminal device is powered on, completes downlink synchronization with the cell in the first network unit and obtains system information, it will initiate a random access procedure to the cell under the first network unit to access the network.
  • the embodiment of this application does not limit the specific random access process.
  • the random access process can be completed through four-step random access, or the random access process can also be completed through two-step random access. This application implements The example does not limit this.
  • the terminal device initiates an RRC connection establishment process to the first network element.
  • the RRC connection establishment process may include a three-way handshake.
  • the terminal device sends an RRC connection request (RRC connection request) message to the first network unit, and the first network unit forwards the RRC connection request message to the second network unit, and informs the second network unit of the identification of the corresponding terminal device And cell identity.
  • RRC connection request RRC connection request
  • the identity of the terminal device and the cell identity may be carried in the RRC connection request message, or may also be sent to the second network unit through separate signaling.
  • the second network element sends an RRC connection setup (RRC connection setup) message to the terminal device through the first network element.
  • RRC connection setup RRC connection setup
  • the second network unit first sends the RRC connection establishment message to the first network unit, and then the first network unit sends the RRC connection establishment message to the terminal device.
  • the terminal device feeds back an RRC connection setup complete (RRC connection setup complete) message to the second network unit through the first network unit to complete the establishment of the RRC connection between the terminal device and the network.
  • RRC connection setup complete RRC connection setup complete
  • the terminal device first sends an RRC connection establishment complete message to the first network unit, and then the first network unit forwards the RRC connection establishment complete message to the second network unit.
  • the terminal device may carry a non-access stratum (non-access stratum, NAS) attach request (attach request) message in the RRC connection establishment complete message.
  • the attachment request message can be used to initiate the attachment of the terminal device at the network NAS layer, that is, authentication and registration.
  • the terminal device initiates an attachment process to the second network element.
  • the attachment procedure may also include a three-way handshake procedure.
  • the terminal device sends an attachment request message to the second network unit through the first network unit.
  • the terminal device first sends an attachment request message to the first network unit, and then the first network unit sends the attachment request message to the second network unit.
  • the attach request message may be sent through a single signaling, or may be carried in the RRC connection establishment complete message in the previous step.
  • the second network unit sends an attach accept (attach accept) message to the terminal device through the first network unit.
  • the second network unit first sends an attachment acceptance message to the first network unit, and then the first network unit sends the attachment acceptance message to the terminal device.
  • the terminal device completes the attachment of the terminal device to the second network unit by feeding back an attach complete (attach complete) message to the second network unit through the first network unit.
  • the terminal device first sends an attachment completion message to the first network unit, and then the first network unit forwards the attachment completion message to the second network unit.
  • authentication, key derivation, and distribution may also exist between the terminal device and the second network element.
  • a mobile network system will perform user authentication based on a subscriber identification module (SIM) card or a universal mobile telecommunications system (UMTS) SIM (USIM) card to avoid the trouble of manually inputting a password.
  • SIM subscriber identification module
  • UMTS universal mobile telecommunications system
  • USIM universal mobile telecommunications system
  • user authentication may also be performed based on certificates. If the terminal device supports IP services, the network will assign an IP address to the terminal device, and can tell the terminal device through the attachment process in this step.
  • the second network unit initiates an access layer security activation process.
  • the second network unit derives the key used for air interface transmission according to the root key.
  • the root key may be a preset root key, or may be a root key obtained according to the authentication process in step 950, which is not limited in the embodiment of the present application.
  • the second network element may use the non-access stratum (AS) security activation process (AS security activation) to transmit the key used for air interface transmission or some input parameters for generating the key, for example, may include the next hop chain counter (next-hop chaining counter, NCC), notify the terminal device.
  • AS security activation non-access stratum
  • NCC next hop chain counter
  • step 950 there is no strict sequence between this step and step 950, and can be performed in parallel or sequentially.
  • the second network unit initiates a radio bearer establishment process.
  • the second network unit After obtaining the packet data unit (PDU) session (PDU) session information configured by the terminal device, the second network unit can initiate a radio bearer setup procedure (DRB setup procedure).
  • DRB setup procedure radio bearer setup procedure
  • the embodiment of the application does not limit when the second network unit obtains the PDU session information.
  • the second network unit may obtain the PDU session information configured by the terminal device.
  • the second network unit may obtain the PDU session information corresponding to the requested service in the subsequent service request process of the terminal device.
  • Step 970 may include the following steps.
  • the second network unit sends a PDU session resource setup request (PDU session resource setup request) message to the first network unit.
  • the second network unit After initiating the radio bearer establishment process, the second network unit sends a PDU session resource establishment request message to the first network unit.
  • an air interface bearer can be established for the terminal device and related parameters can be configured.
  • Related parameters may include, for example, the priority of the logical channel of the bearer.
  • the PDU session resource establishment request message may include: PDU session ID, QoS parameters of each QoS flow corresponding to the PDU session, and other information.
  • the QoS parameters of the QoS flow may also be referred to as the configuration parameters of the QoS flow.
  • the QoS parameters of each QoS flow may include, but are not limited to: PDU session aggregate maximum bit rate (aggregate maximum bit rate, AMBR), 5G QoS identifier (5G QoS Identifier, 5QI), or allocation and reservation priority (an allocation and retention priority, ARP) parameters, etc.
  • the first network element initiates RRC reconfiguration.
  • the first network unit After the first network unit receives the PDU session resource establishment request message, it can map the QoS flow to the DRB according to the QoS flow contained in the PDU session and the QoS parameters of each QoS flow corresponding to the PDU session to establish the PDU session One or more air interface DRBs, and can generate an RRC reconfiguration (RRC reconfiguration) message containing the one or more air interface DRB configurations.
  • the first network unit may deliver the RRC reconfiguration message to the terminal device through the first network unit.
  • the terminal device receives the RRC reconfiguration message and the application takes effect (that is, configures the corresponding DRB), and sends an RRC reconfiguration complete message to the first network element.
  • the first network unit sends a PDU session resource setup response (PDU session resource setup response) message to the second network unit.
  • the first network unit sends a PDU session resource establishment response message to the second network unit to complete the DR establishment process.
  • the first network unit sends the PDU session resource establishment response message to the second network unit and the first network unit to send the RRC reconfiguration message to the terminal device.
  • the first network unit may also first send a PDU session resource establishment response message to the second network unit, and then send an RRC reconfiguration message to the terminal device.
  • the first network unit may also first send an RRC reconfiguration message to the terminal device, and then send a PDU session resource establishment response message to the second network unit.
  • the first network unit may also send an RRC reconfiguration message to the terminal device at the same time, and send a PDU session resource establishment response message to the second network unit.
  • the first network unit initiates an RRC reconfiguration process.
  • the first network unit may process or execute or implement one or more of the following: SpCellConfig, SCellConfig, RLC-config, MAC-cellGroupConfig, or PhysicalCellGroupConfig. Therefore, the first network unit can initiate the reconfiguration of the protocol layer parameters of L1 or L2 (that is, SDAP, PDCP, RLC, MAC, and PHY) to quickly adapt to changes in the air interface radio link status.
  • L1 or L2 that is, SDAP, PDCP, RLC, MAC, and PHY
  • the first network unit can reconfigure one or more of the following parameters to ensure that the transmission performance is not affected: HARQ retransmission times at the MAC layer, ARQ retransmissions at the RLC layer The number of transmissions, or reconfiguration of the PDCP layer to achieve packet duplication, etc.
  • the first network unit sends an RRC reconfiguration message to the terminal device, where the RRC reconfiguration message includes at least a radio bearer configuration.
  • the terminal device After the reconfiguration is successful, the terminal device returns an RRC reconfiguration complete (RRC reconfiguration complete) message to the first network element.
  • the second network unit can process or execute or implement: RRM measurement configuration and/or radio bearer configuration. Therefore, the second network unit can also initiate an RRC reconfiguration process, for example, the second network unit initiates a service The RRC reconfiguration process related to cell and RRM measurement.
  • the first network unit can realize the reconfiguration of L1 or L2 (ie SDAP, PDCP, RLC, MAC, and PHY) protocol layer parameters
  • the second network unit can realize other functions of RRC, such as the second network
  • the unit is responsible for the configuration and reconfiguration process of other functions of the RRC, which not only enables the system to quickly adapt to changes in the air interface radio link status and ensure air interface transmission performance, but also within the range of multiple first network units managed by the second network unit , A set of RRC configurations such as a set of cells and RRM can be uniformly adopted, which can avoid frequent reconfiguration due to the movement of terminal equipment and reduce air interface signaling.
  • the existing NR protocol can be reused as much as possible to reduce the impact on the terminal equipment, the first network unit and the second network unit.
  • FIG. 10 is a schematic interaction diagram of data transmission applicable to an embodiment of the present application.
  • Figure 10 may include the following steps.
  • it may include 1010. 1010, uplink data arrives.
  • the terminal device will send data.
  • the following upper row data is the upper row data of accessing the web page as an example to illustrate.
  • a PDU session is configured for the terminal device, where the QoS flow corresponding to the web page access service is mapped to the data radio bearer (DRB) configured for the terminal device by the network, for example, it is recorded as DRB1.
  • DRB data radio bearer
  • the L2 of the terminal device processes the uplink data.
  • the SDAP layer After the SDAP layer receives the above-mentioned uplink data, it maps the uplink data to DRB1 according to the configured QoS flow to DRB mapping relationship, and delivers it to the PDCP layer corresponding to DRB1.
  • the PDCP layer may first perform some processing on the uplink data, for example, including but not limited to: encryption, integrity protection, etc., and then hand it over to the RLC layer corresponding to the DRB1.
  • the RLC layer can first process the uplink data in confirmed mode or non-confirmed mode, and the RLC layer may also segment the uplink data and then hand it over to the MAC layer.
  • the MAC layer encapsulates the processed uplink data into one or more MAC PDUs and delivers it to the PHY.
  • step 1010 and step 1020 are only exemplary descriptions, and the embodiment of the present application does not limit this.
  • the terminal device sends uplink data to the first network device.
  • the first network device receives uplink data from the terminal device.
  • the PHY After the PHY receives the MAC PDUs delivered by the MAC layer, the PHY can first convert these MAC PDUs into transmission blocks (TB), and send these TBs to the first network device.
  • TB transmission blocks
  • the terminal device After the MAC layer of the terminal device receives the processed uplink data, if it does not find available uplink resources to transmit the uplink data, the terminal device can initiate a scheduling request process and request the first network device to allocate uplink resources for transmission. Upstream data.
  • the first network device may be an LTU.
  • the first network device in the embodiment of the present application is equivalent to the first network unit 510 or the network device 700 in the above embodiment.
  • the first network device in the embodiment of the present application is equivalent to the first network unit 510 or the network device 700 in the above embodiment.
  • the following takes the first network device as an example for exemplary description.
  • it may include 1040. 1040, L2 of the first network device processes the received uplink data.
  • the physical layer of the first network device After the physical layer of the first network device receives the TBs sent by the terminal device, it passes these TBs to the MAC layer, and the MAC layer can restore these TBs to MAC PDUs, and then pass the MAC PDUs to the RLC layer.
  • the RLC layer may perform data reorganization after segmentation, and after the uplink data is restored, the uplink data is delivered to the PDCP layer.
  • the PDCP layer can perform some processing on the uplink data, for example, including but not limited to: encryption, data integrity verification and other processing.
  • the PDCP layer will complete the decryption and pass the integrity verification (if integrity protection) uplink data to the SDAP layer.
  • the SDAP layer can pass the uplink data to the routing function module.
  • the first network device routes the uplink data to the destination address.
  • the first network device may implement the user plane processing function.
  • the routing function module in the first network device after the routing function module in the first network device receives the uplink data, it can route the uplink data to the destination address according to the destination IP address in the uplink data.
  • the destination address can be, for example, the corresponding data.
  • the internet The upstream data will reach the server where the terminal device accesses the web page through IP address addressing.
  • the server will respond to the uplink data, and feedback related content to the terminal device through the downlink data, such as feedback: the content of the accessed webpage, the content of the accessed link, or prompt information, etc.
  • the destination address corresponds to one or more of the following: a data network, other terminal devices, network devices where other terminal devices are located, local applications of the first network device, or second network devices.
  • the network device where the other terminal device is located refers to the network device that has a communication connection with the terminal device, or in other words, the network device that controls the terminal device.
  • the first network device can route uplink data to one or more of the following: a data network, other terminal devices, network devices where other terminal devices are located, local applications of the first network device, or second network devices.
  • the first network device routing function module can route the uplink data to the second network device or other network devices (that is, the network device where other terminal devices are located), and then The second network device or other network device routes the uplink data to the data network.
  • the second network device may be an RCU.
  • the second network device in the embodiment of the present application is equivalent to the second network unit 520 or the network device 800 in the above embodiment.
  • the description of the above embodiment which will not be repeated here.
  • the following takes the second network device as an example for exemplary description.
  • the uplink data may also be Ethernet data.
  • the first network device that is, the routing function module of the first network device
  • the first network device can perform data routing according to the destination MAC address in the Ethernet data.
  • the first network device may directly route the uplink data to the destination address, or the first network device may also route the uplink data to the destination address through the second network device or other network devices.
  • the destination address of the uplink data may be an application or other terminal device in the first network device in the mobile network.
  • the first network device or the second network device may route data to the first network device where the other terminal device is located, and the first network device of the other terminal device transmits the data to the other terminal device.
  • the first network device itself implements programmable logic control (PLC) applications, or the PLC and the first network device are deployed together. At this time, the first network device receives the uplink The data can be routed directly to the PLC.
  • PLC programmable logic control
  • the first network device can realize all user plane functions, such as L1/L2 data processing and data routing functions, so that when the destination address is the local application of the first network device or other terminal devices (such as the first network device under the Other terminal equipment), through the direct routing of the first network equipment, data can be quickly routed to the destination address, avoiding the need to pass through the core network and then send to the local application of the first network equipment or other terminal equipment under the first network equipment Therefore, low-latency transmission between the terminal device and the first network device application or other terminal devices can be realized, and ultra-low-latency services can be supported.
  • L1/L2 data processing and data routing functions so that when the destination address is the local application of the first network device or other terminal devices (such as the first network device under the Other terminal equipment), through the direct routing of the first network equipment, data can be quickly routed to the destination address, avoiding the need to pass through the core network and then send to the local application of the first network equipment or other terminal equipment under the first network equipment Therefore, low-latency transmission between the terminal device and the
  • the first network unit that is, the first network unit 510 or the network device 700 in the above embodiment or the first network device in FIG. 10, for details can refer to the description of the above embodiment, and will not be omitted here To repeat.
  • the mapping of downlink data to DRS can be directly implemented. The following description will be given in conjunction with FIG. 11 and FIG. 12.
  • QoS flow 5G defines a data packet processing mechanism on the air interface based on DRB. Data packets served by a DRB have the same packet processing mechanism in air interface transmission.
  • the base station can establish multiple DRBs with the terminal equipment to satisfy QoS flows with different packet processing requirements. It should be noted that the same DRB may have a mapping relationship with one QoS flow, or may have a mapping relationship with multiple QoS flows.
  • Fig. 11 shows a schematic diagram of the QoS framework defined by the existing 3GPP NR protocol.
  • the UPF will use the traffic filtering template (TFT) corresponding to the PDU session to perform data processing QoS flow classification, and carry QoS flow indicator (QoS flow indicator, QFI) in the GTP-U encapsulation header that transmits the data to the access network device.
  • TFT traffic filtering template
  • QoS flow indicator QoS flow indicator
  • the access network device After the access network device receives the data, it determines the QoS flow to which the data belongs according to the corresponding QFI, and then maps the data to the corresponding DRB at the SDAP layer corresponding to the PDU session according to the pre-configured QoS parameters corresponding to the QoS flow Above, the data is delivered to the PDCP layer corresponding to the DRB.
  • the UPF during the transmission of downlink data from the UPF to the base station, the UPF will map the downlink data to the QoS flow, and differentiate the downlink data of different QoS flows by different scheduling priorities. Processing, first meet the transmission performance requirements of high-priority QoS flows.
  • the first network unit can realize the UPF function and the user plane processing function of the base station. In other words, there is no transmission process from UPF to the base station. Therefore, through the embodiments of this application, the downlink can be directly implemented in the first network unit.
  • the mapping of data to DRB that is, the mapping of downlink data to QoS flow is cancelled.
  • the routing function module in the first network unit (such as the user plane processing function of the first network unit 510) can directly implement the mapping of the downlink data to the DRB, and hand the downlink data to the PDCP layer corresponding to the DRB. Therefore, for For PDU sessions, the SDAP layer is configurable. In other words, for the PDU session, the SDAP layer can be configured or not.
  • the architecture provided by this application can also use the existing 3GPP NR similar QoS reflective (QoS reflective) mechanism, so as to quickly respond to uplink data and save signaling overhead.
  • the upper layer of the terminal device receives the data, it first maps the uplink data to the QoS flow, and then passes the data to the SDAP layer (that is, the data needs to be processed by the SDAP layer).
  • the SDAP layer continues to map the QoS flow to the DRB, and delivers the uplink data to the PDCP layer corresponding to the DRB.
  • the mapping of uplink data to QoS flow and the mapping of QoS flow to DRB usually require network equipment to send signaling to terminal equipment for configuration.
  • the existing 3GPP NR agreement agrees to the QoS reflection mechanism, that is, to enable the terminal by setting the QoS reflection function in the SDAP header of the downlink data
  • the uplink data corresponding to the downlink data by the device In other words, the mapping of data corresponding to the downlink data to QoS flow and the mapping of QoS flow to DRB are adopted.
  • the QoS reflection mechanism can be used regardless of whether the SDAP layer is configured.
  • the PDCP layer can be used to confirm whether to enable the QoS reflection function.
  • a possible implementation is to carry QoS reflective indication information in the PDCP header.
  • the first network unit turns on the QoS reflection function by setting the PDCP header, thereby instructing the terminal device to use the data corresponding to the downlink data to the DRB mapping for the uplink data corresponding to the downlink data.
  • the uplink usually only needs to complete the "uplink data to DRB" mapping.
  • the "correspondence" can be determined through the exchange of the source and destination addresses in the TCP/UDP and IP headers, and the same content in other fields.
  • the "correspondence" can be confirmed by the exchange of the source and destination addresses in the Ethernet header, and the same content in other fields.
  • the QoS reflection indication information may be indicated by 1 bit in the PDCP header, or the QoS reflection indication information may be indicated by the reservation (reserve) field in the PDCP header.
  • the PDCP PDU format contains a 12-bit PDCP serial number (SN).
  • the SDAP layer can indicate whether to enable the QoS reflection function to realize the QoS reflection function and reduce the signaling overhead.
  • FIG. 13 is a schematic block diagram of a communication device 1300 according to an embodiment of the present application.
  • the device 1300 may include a communication unit 1310 and a processing unit 1320.
  • the communication unit 1310 can communicate with the outside, and the processing unit 1320 is used for data processing.
  • the communication unit 1310 may also be referred to as a communication interface or a transceiving unit.
  • the apparatus 1300 may implement the steps or processes performed by the first network unit 510 (such as LTU) in the above embodiment.
  • the first network unit 510 such as LTU
  • it may be the network device 700 or be configured in the network device 700. Chip or circuit in the.
  • the device 1300 may be called a network device.
  • the communication unit 1310 is used to perform the transceiving-related operations on the side of the first network unit 510 (such as LTU) in the above embodiment
  • the processing unit 1320 is used to perform the processing of the first network unit 510 (such as LTU) in the above embodiment Related operations.
  • the apparatus 1300 may implement the steps or processes performed by the first network device in the method 900 or 1000 according to the embodiment of the present application.
  • the apparatus 1300 may include a method for executing the method 900 in FIG. 9 Or a unit of the method executed by the first network device in the method 1000 in FIG. 10.
  • each unit in the device 1300 and other operations and/or functions described above are used to implement the corresponding process of the method 900 in FIG. 9 or the method 1000 in FIG. 10, respectively.
  • the device 1300 can implement the steps or processes performed by the second network unit 520 (such as the RCU) in the above embodiment.
  • the second network unit 520 such as the RCU
  • it can be a network device 800 or configured in a network device. 800 chips or circuits.
  • the apparatus 1300 may be called a network device.
  • the communication unit 1310 is used to perform the transceiving-related operations on the second network unit 520 (such as RCU) in the above embodiment
  • the processing unit 1320 is used to perform the processing of the second network unit 520 (such as RCU) in the above embodiment.
  • Related operations are used to implement the steps or processes performed by the second network unit 520 (such as the RCU) in the above embodiment.
  • the apparatus 1300 may implement the steps or processes performed by the second network device in the method 900 or 1000 according to the embodiment of the present application.
  • the apparatus 1300 may include a method for executing the method 900 in FIG. 9 Or a unit of the method executed by the second network device in the method 1000 in FIG. 10.
  • each unit in the device 1300 and other operations and/or functions described above are used to implement the corresponding process of the method 900 in FIG. 9 or the method 1000 in FIG. 10, respectively.
  • FIG. 14 is a schematic structural diagram of a communication device 1400 provided by an embodiment of the present application.
  • the device can implement the function of the first network unit 510 (such as the LTU) in the above embodiment, or the action performed by the first network device in the above method embodiment.
  • the method executed by the first network device in method 900 or method 1000 may be executed.
  • the device 1400 includes:
  • the memory 1410 is used to store programs
  • Communication interface 1420 used to communicate with other devices
  • the processor 1430 is configured to execute a program in the memory 1410, and when the program is executed,
  • the processor 1420 is configured to implement: functions corresponding to SDAP, functions corresponding to PDCP, functions corresponding to RLC, functions corresponding to MAC, functions corresponding to PHY, and user plane processing functions corresponding to UPF, or,
  • the processor 1420 is configured to configure one or more of the following: SpCellConfig, SCellConfig, RLC-config, MAC-cellGroupConfig, or PhysicalCellGroupConfig.
  • FIG. 15 is a schematic structural diagram of a communication device 1500 provided by an embodiment of the present application.
  • the device can implement the function of the second network unit 520 (such as the RCU) in the above embodiment, or the action performed by the second network device in the above method embodiment.
  • the method executed by the second network device in method 900 or method 1000 may be executed.
  • the device 1500 includes:
  • the memory 1510 is used to store programs
  • the communication interface 1520 is used to communicate with other devices;
  • the processor 1530 is configured to execute a program in the memory 1510, and when the program is executed,
  • the processor 1520 is configured to configure: radio resource management RRM measurement configuration and/or radio bearer configuration; and/or,
  • the processor 1520 is used to implement: one or more of the following functions: AMF, SMF, PCF, or AUSF.
  • the aforementioned communication interface (1420, 1520) may be a receiver or a transmitter, or may also be a transceiver.
  • the steps of the above method can be completed by hardware integrated logic circuits in the processor or instructions in the form of software.
  • the steps of the method disclosed in the embodiments of the present application may be directly embodied as being executed and completed by a hardware processor, or executed and completed by a combination of hardware and software modules in the processor.
  • the software module can be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, registers.
  • 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 capability.
  • the steps of the foregoing method embodiments can be completed by hardware integrated logic circuits 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 gates or transistor logic devices, discrete hardware components .
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • the methods, steps, and logical block diagrams disclosed in the embodiments of the present application can be implemented or executed.
  • the general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like.
  • the steps of the method disclosed in the embodiments of the present application may be directly embodied as being executed and completed by a hardware decoding processor, or executed and completed by a combination of hardware and software modules in the decoding processor.
  • the software module can be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, registers.
  • 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.
  • the memory in the embodiments of the present application may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory can be read-only memory (ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), and electronic Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory.
  • the volatile memory may be random access memory (RAM), which is used as an external cache.
  • RAM random access memory
  • static random access memory static random access memory
  • dynamic RAM dynamic random access memory
  • DRAM dynamic random access memory
  • SDRAM synchronous dynamic random access memory
  • double data rate synchronous dynamic random access memory double data rate SDRAM, DDR SDRAM
  • enhanced synchronous dynamic random access memory enhanced SDRAM, ESDRAM
  • serial link DRAM SLDRAM
  • direct rambus RAM direct rambus RAM
  • the present application also provides a computer program product, the computer program product includes: computer program code, when the computer program code runs on a computer, the computer executes the method 900 and method 1000.
  • the method of any one of the embodiments is shown.
  • the present application also provides a computer-readable medium that stores program code, and when the program code runs on a computer, the computer executes the method 900 and method 1000.
  • the method of any one of the embodiments is shown.
  • 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 devices.
  • 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.
  • 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 or data center integrated with one or more available media.
  • the usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a high-density digital video disc (digital video disc, DVD)), or a semiconductor medium (for example, a solid state disk (solid state disc, SSD)) etc.
  • component used in this specification are used to denote computer-related entities, hardware, firmware, a combination of hardware and software, software, or software in execution.
  • the component may be, but is not limited to, a process, a processor, an object, an executable file, an execution thread, a program, and/or a computer running on a processor.
  • the application running on the computing device and the computing device can be components.
  • One or more components may reside in processes and/or threads of execution, and components may be located on one computer and/or distributed between two or more computers.
  • these components can be executed from various computer readable media having various data structures stored thereon.
  • the component may be based on, for example, a signal having one or more data packets (such as data from two components interacting with another component in a local system, a distributed system, and/or a network, such as the Internet that interacts with other systems through signals) Communicate through local and/or remote processes.
  • a signal having one or more data packets (such as data from two components interacting with another component in a local system, a distributed system, and/or a network, such as the Internet that interacts with other systems through signals) Communicate through local and/or remote processes.
  • the disclosed system, device, and method may be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components can be combined or It can be integrated into another system, or some features can be ignored or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
  • each unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium.
  • the technical solution of this application 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, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in each embodiment of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (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)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un système de communication et un dispositif réseau qui permet de diminuer un retard de transmission de données et de réduire les coûts. Le système de communication peut comprendre : une première unité de réseau et une seconde unité de réseau. La première unité de réseau communique avec la seconde unité de réseau au moyen d'une interface de communication. La première unité de réseau permet de mettre en œuvre une fonction de traitement de plan d'utilisateur correspondant à une couche 1, une fonction de traitement de plan d'utilisateur correspondant à une couche 2 et une fonction de traitement de plan d'utilisateur correspondant à une fonction de plan d'utilisateur (UPF). La seconde unité de réseau permet de mettre en œuvre une partie de fonctions de commande de ressources radio (RRC) et une fonction de réseau central, la fonction de réseau central comprenant une ou plusieurs fonctions parmi une fonction de gestion d'accès et de mobilité (AMF), une fonction de gestion de session (SMF), une fonction de commande de politique (PCF) ou une fonction de service d'authentification (AUSF).
PCT/CN2020/083516 2019-04-30 2020-04-07 Système de communication et dispositif réseau WO2020220943A1 (fr)

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