WO2020224555A1 - Procédé et appareil d'établissement de plan utilisateur - Google Patents

Procédé et appareil d'établissement de plan utilisateur Download PDF

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Publication number
WO2020224555A1
WO2020224555A1 PCT/CN2020/088475 CN2020088475W WO2020224555A1 WO 2020224555 A1 WO2020224555 A1 WO 2020224555A1 CN 2020088475 W CN2020088475 W CN 2020088475W WO 2020224555 A1 WO2020224555 A1 WO 2020224555A1
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WO
WIPO (PCT)
Prior art keywords
base station
information
network element
secondary base
user plane
Prior art date
Application number
PCT/CN2020/088475
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English (en)
Chinese (zh)
Inventor
姚琦
李飞
丁辉
Original Assignee
华为技术有限公司
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Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Publication of WO2020224555A1 publication Critical patent/WO2020224555A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/11—Allocation or use of connection identifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/12—Setup of transport tunnels

Definitions

  • This application relates to the field of mobile communication technology, and in particular to a method and device for establishing a user plane.
  • PDU protocol data unit
  • UPF user plane function
  • the network side can also select UPF for the secondary base station.
  • a terminal device accesses a data network through a secondary base station, it may not be able to provide high-quality business services for the terminal device.
  • This application provides a method and device for establishing a user plane, which can be used to optimize the access configuration scheme of the access network equipment for the UE in the 5G vertical industry scenario.
  • this application provides a method for establishing a user plane, which may be implemented by a session control network element.
  • the session control network element can receive a first request, the first request is used to request the establishment of a first connection, the session control network element also receives information of a secondary base station, and the session control network element is based on the secondary base station.
  • the information of the base station selects the first user plane network element, the first user plane network element serves the first connection, and sends the tunnel information of the first user plane network element and the second information to the main base station, where:
  • the second information is used to indicate that the user plane of the first connection passes through the secondary base station, and the session control network element may also send tunnel information of the secondary base station to the first user plane network element.
  • the session control network element can receive the first request and receive the information of the secondary base station, so that in the process of establishing the first connection according to the first request, the session control network element selects the appropriate user plane network according to the information of the secondary base station.
  • the session control network element can select the user plane network element to establish the user plane connection according to the information of the secondary base station.
  • the session control network element selects the user plane network element based on the information of the primary base station, and the path between the selected user plane network element and the secondary base station is better, thereby optimizing the path of the connection on the user plane and improving Connection quality.
  • the information of the secondary base station may include the identity (ID or id) of the cell of the secondary base station, and/or the identity of the secondary base station, and/or the secondary base station Tunnel information.
  • the session control network element can select a suitable user plane network element, for example, select a user plane network element with a shorter distance from the secondary base station to improve the transmission quality between the secondary base station and the user plane network element And/or transmission rate, where the information of the secondary base station can be used to indicate the location of the secondary base station, or can be used to query the location of the secondary base station, for example, the information of the secondary base station can include the identity of the secondary base station, the identity of the cell of the secondary base station or the secondary base station Part or all of the information in the tunnel information.
  • the session control network element may also receive the tunnel information of the secondary base station.
  • the tunnel information of the secondary base station is used to establish the connection between the secondary base station and the user plane network element. Therefore, when the information of the secondary base station does not include the tunnel information of the secondary base station, the session control network element also needs to receive the secondary base station’s Tunnel information.
  • the above secondary base station information is sent by the primary base station to the access and mobility management network element, and the access and mobility management network element sends the secondary base station information to the session control network element.
  • the session control network element may also receive a second request from the primary base station, and the second request is used to request the establishment of a second connection; if the second connection requires redundancy processing (Alternatively, redundant processing is required, redundant processing is required), the session control network element sends first information to the primary base station, and the first information is used to indicate the user who establishes the second connection through the primary base station In other words, the first information is used to notify the main base station that the second session needs to be redundantly processed, that is, a mutually redundant connection with the second connection is established.
  • the steps described in the above design can be executed before the session control network element receives the first request.
  • the master base station can determine that a dual connection needs to be established according to the received first information, and send it to the access and mobility management network element Send the information of the secondary base station.
  • the access and mobility management network element may send the information of the secondary base station to the session control network element.
  • the second information may be used to indicate the establishment of the user plane of the first connection through the secondary base station, or in other words, the second The information is used to notify the primary base station that the first session needs to be redundantly processed, that is, there is a redundant connection with the first connection.
  • the session control network element can determine that a redundant connection needs to be established according to the first request, and accordingly send second information to the primary base station for the primary base station to select the secondary base station and send the secondary base station information to the session control network element.
  • the session control network element may also determine a second user plane network element according to the information of the primary base station, and the second user The plane network element serves the first connection; then, when the session control network element selects the first user plane network element according to the information of the secondary base station, it may reselect the first user plane network element according to the information of the secondary base station.
  • the user plane network element serves the first connection; or, the session control network element may insert the first user plane network element between the secondary base station and the second user plane network element, and the first user plane network element
  • a user plane network element is an intermediate user plane network element.
  • the session control network element can reselect based on the information of the secondary base station, and the new user plane network has been determined Yuan is the first connection service.
  • the session control network element can insert an intermediate user plane network element between the secondary base station and the selected user plane network element, the intermediate user plane network element is selected based on the information of the secondary base station, so that the secondary base station and the intermediate user can be established
  • the connection between the plane network elements and the intermediate user plane network element and the user plane network element selected according to the primary base station realize the establishment of the user plane path and optimize the connection between the secondary base station and the user plane network element.
  • the information of the primary base station includes some or all of the following information: the identity of the primary base station; or, the identity of the cell of the primary base station; or, the tunnel information of the primary base station.
  • the session control network element may be an SMF network element.
  • the user plane network element may be a UPF network element.
  • the access and mobility management network element may be an AMF network element.
  • the first connection and the second connection may be PDU sessions.
  • this application provides a method for establishing a user plane, which can be implemented by a master base station.
  • the primary base station sends a first request, the first request is used to request the establishment of the first connection; the primary base station sends information of the secondary base station; the primary base station receives the tunnel information and the second information of the first user plane network element, so The first user plane network element serves the first connection, and the second information is used to indicate that the user plane of the first connection passes through the secondary base station; the primary base station sends the second base station to the secondary base station.
  • a tunnel information of a user plane network element is used to indicate that the user plane of the first connection passes through the secondary base station.
  • the information of the secondary base station may include some or all of the following information: the identity of the secondary base station; or, the identity of the cell of the secondary base station; or, the tunnel information of the secondary base station .
  • the primary base station may send the tunnel information of the secondary base station to the access and mobility management network element.
  • the primary base station may select a secondary base station, and a dual connection is established through the secondary base station.
  • the process of establishing dual connections can be executed immediately after the secondary base station is selected, or it may not be executed temporarily after the secondary base station is selected.
  • the main base station may send a second request, the second request is used to request the establishment of a second connection; the main base station may receive first information, the first information is used to indicate The primary base station establishes the user plane of the second connection.
  • the primary base station receives second information, and the second information is used to indicate the user plane for establishing the first connection through the secondary base station.
  • the first request may include information of the primary base station.
  • the information of the primary base station may include part or all of the following information: the identity of the primary base station; or, the identity of the cell of the primary base station; or, the tunnel information of the primary base station.
  • the session control network element may be an SMF network element.
  • the user plane network element may be a UPF network element.
  • the access and mobility management network element may be an AMF network element.
  • the first connection and the second connection may be PDU sessions.
  • this application provides a method for establishing a user plane, which can be implemented by an access and mobility management network element.
  • the access and mobility management network element receives a first request from the primary base station, and the first request is used to request the establishment of a first connection; the access and mobility management network element sends all data to the first session control network element.
  • the first request; the access and mobility management network element receives information of the secondary base station from the primary base station; the access and mobility management network element receives a first user plane network element from the first session control network element
  • the second information is used to indicate that the user plane of the first connection passes through the secondary base station, and the access and mobility management network element sends the first user to the primary base station
  • the tunnel information of the surface network element and the second information is used to indicate that the user plane of the first connection passes through the secondary base station, and the access and mobility management network element sends the first user to the primary base station.
  • the information of the secondary base station includes some or all of the tunnel information of the secondary base station, the identifier of the secondary base station, or the identifier of the cell of the secondary base station. Further, when the information of the secondary base station does not include the tunnel information of the secondary base station, the access and mobility management network element may also receive the tunnel information of the secondary base station from the primary base station and send it to the first session control network. The element sends the tunnel information of the secondary base station.
  • the access and mobility management network element may also receive a second request from the primary base station, and the second request is used to request a second connection to the first session control network element.
  • the second request is sent, and first information is received from the first session control network element, where the first information is used to indicate that the user plane of the second connection is established through the primary base station, and sends all the information to the primary base station. ⁇ Said first information.
  • the access and mobility management network element may also receive a second request from the primary base station, and the second request is used to request the establishment of a second connection and send it to the second session control network element
  • the second request is to receive first information from the second session control network element, where the first information is used to instruct to establish the user plane of the first connection through the primary base station, and send the First information.
  • the access and mobility management network element may also receive second information from the first session control network element, where the second information is used to instruct to establish the first connection through a secondary base station The user plane; the access and mobility management network element sends the second information to the primary base station.
  • the first request may include information of the primary base station.
  • the information of the primary base station includes some or all of the following information: the identity of the primary base station; or, the identity of the cell of the primary base station; or, the tunnel information of the primary base station.
  • both the first session control network element and the second session control network element may be SMF network elements.
  • the first session control network element and the second session control network element may be the same session control network element, or may be different session control network elements.
  • the user plane network element may be a UPF network element.
  • the access and mobility management network element may be an AMF network element.
  • the first connection and the second connection may be PDU sessions.
  • this application provides a method for establishing a user plane, which can be implemented by a session control network element, an access and mobility management network element, and a main base station.
  • the primary base station sends a first request to the access and mobility management network element, the first request is used to request the establishment of a first connection;
  • the access and mobility management network element sends the first request to the session control network element;
  • the primary base station sends the information of the secondary base station to the access and mobility management network element, and the access and mobility management network element sends the information of the secondary base station to the session control network element;
  • the session control network element selects the first user according to the information of the secondary base station A plane network element, the first user plane network element serves the first connection;
  • the session control network element sends the tunnel information and second information of the first user plane network element to the access and mobility management network element,
  • the second information is used to indicate that the user plane of the first connection passes through the secondary base station, and the access and mobility management network element sends the tunnel information and second information
  • the session control network element may be an SMF network element.
  • the user plane network element may be a UPF network element.
  • the access and mobility management network element may be an AMF network element.
  • the first connection may be a PDU session.
  • this application provides a communication device.
  • the communication device can be used to execute the steps performed by the session control network element in the first aspect or any possible design of the first aspect.
  • the communication device can be implemented in the form of a hardware structure, a software module, or a hardware structure plus a software module. Realize the functions in the above methods.
  • the communication device when constituted by a software module, the communication device may include a communication module and a processing module coupled with each other.
  • the communication module may be used to support the communication device to communicate, and the processing module may be used for the communication device to perform processing operations, such as generating information to be sent. /Message, or process the received signal to get information/message.
  • the communication device may include a transceiver, a memory, a processor, etc. coupled with each other.
  • the communication module may be used to receive a first request, the first request is used to request the establishment of a first connection, and to receive information of the secondary base station; the processing module may be used to Select the first user plane network element, and the first user plane network element serves the first connection; the communication module can also send the tunnel information and second information of the first user plane network element to the main base station And send the tunnel information of the secondary base station to the first user plane network element, and the second information is used to indicate that the user plane of the first connection passes through the secondary base station.
  • the information of the secondary base station includes some or all of the tunnel information of the secondary base station, the identifier of the secondary base station, or the identifier of the cell of the secondary base station.
  • the communication module may also receive the tunnel information of the secondary base station.
  • the communication module may also receive a second request from the main base station, and the second request is used to request the establishment of a second connection; if the second connection requires redundancy processing, the communication module also The first information may be sent to the primary base station, where the first information is used to indicate a user plane for establishing the second connection through the primary base station.
  • the communication module may also send second information to the primary base station, where the second information is used to instruct to establish the first connection through the secondary base station.
  • the user plane of the connection may also send second information to the primary base station, where the second information is used to instruct to establish the first connection through the secondary base station.
  • the first request includes information of the primary base station
  • the processing module may also determine a second user plane network element according to the information of the primary base station, and the second user plane network element serves The first connection; in selecting a first user plane network element according to the information of the secondary base station, the processing module may reselect the first user plane network element to serve the first connection according to the information of the secondary base station Or, the processing module may insert the first user plane network element between the secondary base station and the second user plane network element, where the first user plane network element is an intermediate user plane network element.
  • the information of the primary base station includes some or all of the following information: the identity of the primary base station; or, the identity of the cell of the primary base station; or, the tunnel of the primary base station information.
  • the session control network element may be an SMF network element.
  • the user plane network element may be a UPF network element.
  • the access and mobility management network element may be an AMF network element.
  • the first connection may be a PDU session.
  • the above communication device can also be implemented by hardware components.
  • the communication device may include a processor, and the processor may be used to execute the steps performed by the above processing module.
  • the communication device may further include a transceiver, and the transceiver may execute the steps performed by the above communication module.
  • the communication device may further include a memory, and the memory may be used to store a program for the processor to execute the program to perform the steps performed by the above processing module.
  • this application provides a communication device.
  • the communication device can be used to execute the steps performed by the master base station in the second aspect or any possible design of the second aspect.
  • the communication device can implement the foregoing in the form of a hardware structure, a software module, or a hardware structure plus a software module.
  • Each function in each method when constituted by a software module, the communication device may include a communication module and a processing module coupled with each other.
  • the communication module may be used to support the communication device to communicate, and the processing module may be used for the communication device to perform processing operations, such as generating information to be sent. /Message, or process the received signal to get information/message.
  • the communication device may include a transceiver, a memory, a processor, etc. coupled with each other.
  • the communication module can be used to send a first request, which is used to request the establishment of a first connection; the communication module can also send information about the secondary base station; and the communication module can also receive the first request.
  • Tunnel information and second information of a user plane network element where the first user plane network element serves the first connection, and the second information is used to indicate that the user plane of the first connection passes through the secondary base station;
  • the communication module may also send the tunnel information of the first user plane network element to the secondary base station.
  • the information of the secondary base station includes some or all of the tunnel information of the secondary base station, the identifier of the secondary base station, or the identifier of the cell of the secondary base station. Further, when the information of the secondary base station does not include the tunnel information of the secondary base station, the communication module may also send the tunnel information of the secondary base station to the access and mobility management network element.
  • the processing module may be used to select a secondary base station, and establish a dual connection through the secondary base station.
  • the communication module can also send a second request, the second request is used to request the establishment of a second connection; the communication module can also receive first information, the first information is used to instruct to pass the main base station Establish the user plane of the second connection.
  • the communication module may also receive second information, where the second information is used to indicate the user plane for establishing the first connection through the secondary base station.
  • the first request includes information of the primary base station.
  • the information of the primary base station includes some or all of the following information: the identity of the primary base station; or, the identity of the cell of the primary base station; or, the tunnel information of the primary base station.
  • the session control network element may be an SMF network element.
  • the user plane network element may be a UPF network element.
  • the access and mobility management network element may be an AMF network element.
  • the first connection may be a PDU session.
  • the above communication device can also be implemented by hardware components.
  • the communication device may include a processor, and the processor may be used to execute the steps performed by the above processing module.
  • the communication device may further include a transceiver, and the transceiver may execute the steps performed by the above communication module.
  • the communication device may further include a memory, and the memory may be used to store a program for the processor to execute the program to perform the steps performed by the above processing module.
  • this application provides a communication device.
  • the communication device can be used to execute the steps performed by the access and mobility management network element in the above-mentioned third aspect or any possible design of the third aspect.
  • the communication device can adopt a hardware structure, a software module, or a hardware structure plus a software module.
  • the communication device may include a communication module and a processing module coupled with each other.
  • the communication module may be used to support the communication device to communicate, and the processing module may be used for the communication device to perform processing operations, such as generating information to be sent. /Message, or process the received signal to get information/message.
  • the communication device may include a transceiver, a memory, a processor, etc. coupled with each other.
  • the communication module may be used to receive a first request from the main base station, and the first request is used to request the establishment of a first connection; the communication module may also send the first session control network element The first request; the communication module may also receive information of the secondary base station from the primary base station; the communication module may also receive the tunnel information and the second information of the first user plane network element from the first session control network element, and send it to the The primary base station sends the tunnel information of the first user plane network element and second information, where the second information is used to indicate that the user plane of the first connection passes through the secondary base station.
  • the information of the secondary base station includes some or all of the tunnel information of the secondary base station, the identifier of the secondary base station, or the identifier of the cell of the secondary base station. Further, when the information of the secondary base station does not include the tunnel information of the secondary base station, the communication module may also receive the tunnel information of the secondary base station from the primary base station, and send the information of the secondary base station to the first session control network element. Tunnel information.
  • the access and mobility management network element may also receive a second request from the primary base station, and the second request is used to request a second connection to the first session control network element.
  • the second request is sent, and first information is received from the first session control network element, where the first information is used to indicate that the user plane of the second connection is established through the primary base station, and sends all the information to the primary base station. ⁇ Said first information.
  • the communication module may also receive a second request from the primary base station, the second request is used to request the establishment of a second connection, and send the second request to the second session control network element,
  • the second session control network element receives first information, where the first information is used to indicate a user plane for establishing the first connection through a primary base station, and sends the first information to the primary base station.
  • the communication module may also receive second information from the first session control network element, where the second information is used to indicate the user plane for establishing the first connection through the secondary base station; The module may also send the second information to the main base station.
  • the first request moment includes information of the primary base station.
  • the information of the primary base station includes some or all of the following information: the identity of the primary base station; or, the identity of the cell of the primary base station; or, the tunnel information of the primary base station.
  • both the first session control network element and the second session control network element may be SMF network elements.
  • the first session control network element and the second session control network element may be the same session control network element, or may be different session control network elements.
  • the user plane network element may be a UPF network element.
  • the access and mobility management network element may be an AMF network element.
  • the first connection and the second connection may be PDU sessions.
  • the above communication device can also be implemented by hardware components.
  • the communication device may include a processor, and the processor may be used to execute the steps performed by the above processing module.
  • the communication device may further include a transceiver, and the transceiver may execute the steps performed by the above communication module.
  • the communication device may further include a memory, and the memory may be used to store a program for the processor to execute the program to perform the steps performed by the above processing module.
  • the present application provides a communication system, which may include the communication device described in any one or more of the fifth aspect, the sixth aspect, or the seventh aspect.
  • this application provides a computer storage medium in which instructions (or programs) are stored, which when invoked and executed on a computer, cause the computer to execute the above-mentioned first aspect or the first aspect.
  • the present application provides a computer program product, which may contain instructions, when the computer program product runs on a computer, causes the computer to execute the first aspect or any one of the first aspects.
  • the method described in the design, or used to implement the method described in the second aspect or any possible design of the second aspect, or used to implement the third aspect or any possible design of the third aspect The method described.
  • the present application provides a chip or a chip system including the chip, and the chip may include a processor.
  • the chip may also include memory and/or communication modules.
  • the chip can be used to implement the method described in the first aspect or any possible design of the first aspect, or used to implement the method described in the second aspect or any possible design of the second aspect, Or used to implement the method described in the third aspect or any possible design of the third aspect.
  • the chip system may be composed of the above-mentioned chips, or may include the above-mentioned chips and other discrete devices, such as communication modules.
  • beneficial effects of the fourth aspect to the eleventh aspect and its possible designs refer to the beneficial effects of the method described in the first aspect and any of its possible designs, or the second aspect and any of its possible designs. Or a description of the beneficial effects of the method in the third aspect and any of its possible designs.
  • FIG. 1 is a schematic diagram of the architecture of a wireless communication system provided by this application.
  • FIG. 2 is a schematic diagram of the architecture of another wireless communication system provided by this application.
  • FIG. 3 is a schematic diagram of the architecture of another wireless communication system provided by this application.
  • FIG. 4 is a schematic flowchart of a method for establishing a user plane provided by this application.
  • FIG. 5 is a schematic flowchart of another method for establishing a user plane provided by this application.
  • FIG. 6 is a schematic flowchart of another method for establishing a user plane provided by this application.
  • FIG. 7 is a schematic structural diagram of a communication device provided by this application.
  • FIG. 8 is a schematic structural diagram of another communication device provided by this application.
  • FIG. 9 is a schematic structural diagram of another communication device provided by this application.
  • FIG. 10 is a schematic structural diagram of another communication device provided by this application.
  • FIG. 11 is a schematic structural diagram of another communication device provided by this application.
  • FIG. 12 is a schematic structural diagram of another communication device provided by this application.
  • At least one refers to one or more than one, that is, includes one, two, three and more.
  • Multiple refers to two or more than two, that is, two, three and more.
  • Carrying can mean that a certain message is used to carry certain information or data, or it can mean that a certain message is composed of certain information.
  • Coupling refers to the indirect coupling or communication connection between devices, units or modules, which can be electrical, mechanical or other forms, and is used for information exchange between devices, units or modules.
  • At least one of a, b, or c can mean: a, b, c, a and b, a and c, b and c, or a, b and c, where a, b, c It can be single or multiple.
  • the wireless communication system provided by the embodiment of the application is introduced.
  • the method for establishing a user plane provided in this application can be applied to the system.
  • the method for establishing a user plane provided by the embodiment of the application is introduced.
  • the embodiment of the application is introduced.
  • a wireless communication system 100 may include a terminal device 101 and a network device 102.
  • the wireless communication system 100 provided in the embodiment of the present application is applicable to both low frequency scenarios (sub 6G) and high frequency scenarios (above 6G).
  • the application scenarios of the wireless communication system 100 provided in the embodiments of the present application include, but are not limited to, a long term evolution (LTE) system, an LTE frequency division duplex (FDD) system, and an LTE time division duplex (time division duplex) system. , TDD), fifth-generation systems or new radio (NR) communication systems, and future communication systems.
  • LTE long term evolution
  • FDD frequency division duplex
  • time division duplex time division duplex
  • TDD fifth-generation systems or new radio (NR) communication systems
  • future communication systems future communication systems.
  • the terminal device 101 shown above may be a user equipment, a terminal (terminal), a mobile station (MS), a mobile terminal (mobile terminal), etc.
  • the terminal device 101 can communicate with one or more of one or more communication systems.
  • a network device communicates and accepts network services provided by the network device.
  • the network device here includes but is not limited to the network device 102 shown in the figure.
  • the terminal device 101 in the embodiment of the present application may be a mobile phone (or called a "cellular" phone), a computer with a mobile terminal, etc., and the terminal device 101 may also be portable, pocket-sized, handheld, and built-in computer. , Or on-board mobile devices.
  • the terminal device 101 may also be a communication chip with a communication module.
  • the network device 102 shown above may include the access network device (or called the access website point) described in this application.
  • the network device 102 may include an access network device.
  • an access network device refers to a device that provides a network access function, such as a radio access network (RAN) base station and so on.
  • the network device 102 may specifically include a base station (base station, BS), or include a base station and a radio resource management device for controlling the base station, etc.
  • the network device 102 may be a relay station (relay device), an access point, a vehicle-mounted device, Wearable devices, base stations in the future 5G network, base stations in the future evolved public land mobile network (PLMN) network, or NR base stations, etc., are not limited in the embodiment of the present application.
  • the network device 102 may also be a communication chip with a communication module.
  • the network device 102 can serve as a RAN base station to provide a wireless network connection to the terminal device 101.
  • the network device 102 can serve as a 4G access network-an evolved universal mobile telecommunications system. system, UMTS) the access network base station in the terrestrial radio access network (evolved UMTS terrestrial radio access network, E-UTRAN), or the network device 102 can be used as the 5G access network—the access network base station in 5G RAN, Alternatively, the network device 102 may be used as an access network base station in a future wireless communication system.
  • UMTS evolved universal mobile telecommunications system
  • E-UTRAN evolved UMTS terrestrial radio access network
  • 5G access network the access network base station in 5G RAN
  • the network device 102 may be used as an access network base station in a future wireless communication system.
  • an exemplary 5G wireless communication system may include a 5G core network 201, and the wireless communication system may also include a 5G access network 202, where the 5G core network 201 and the 5G access network 202 can pass through Interface to achieve interaction.
  • the functional entity used to implement the method involved in the embodiment of the present application may be a network element (such as AMF) and/or terminal equipment in the 5G core network 201.
  • the terminal device 101 involved in the embodiment of the present application may include a terminal device connected to a base station in the 5G access network 202, such as the UE 203 shown in FIG.
  • the network base station 204, the access network base station 204 may be a base station in the 5G access network 202; the terminal device 101 involved in this embodiment of the application may also include a UE connected to a relay, such as the UE 205 shown in FIG. 2, Among them, the UE 205 is connected to a relay station 206, and the relay station 206 is connected to the access network base station 204 through a relay link.
  • the network device 102 involved in the embodiment of the present application may be the access network base station 204 in the 5G access network 202 as shown in FIG. 2, or may be connected to the access network base station 204 as shown in FIG. Relay station 206.
  • FIG. 3 illustrates another possible architecture of the wireless communication system provided by the embodiment of the present application.
  • FIG. 3 it is a schematic diagram of the fifth-generation network architecture based on a service-oriented architecture.
  • the network architecture shown in FIG. 3 may include three parts, namely a terminal device part, a data network (DN), and an operator network part.
  • DN data network
  • the operator network may include network slice selection (NSSF), network exposure function (NEF) network elements, network storage function (network function repository function, NRF) network elements, and policy control functions ( policy control function, PCF) network element, unified data management (unified data management, UDM) network element, application function (AF) network element, network vision and awareness function (network vision and awareness function, NVAF) network element, Authentication server function (authentication server function, AUSF) network element, access and mobility management function (access and mobility management function, AMF) network element, session management function (session management function, SMF) network element, (wireless) connection Access network ((radio) access network, (R) AN) and user plane function (user plane function, UPF) network elements, etc.
  • NSF network slice selection
  • NRF network exposure function
  • NRF network storage function repository function
  • PCF policy control functions
  • PCF policy control function
  • unified data management unified data management, UDM
  • AF application function
  • NVAF network vision and awareness function
  • the part other than the (wireless) access network part may be referred to as the core network (CN) part.
  • CN core network
  • R RAN
  • the UE as shown in Figure 3 can be a device with wireless transceiver function, which can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; it can also be deployed on the water (such as ships, etc.); it can also be deployed on In the air (such as airplanes, balloons, satellites, etc.).
  • the UE may be a mobile phone (mobile phone), a tablet computer (pad), a computer with wireless transceiving function, a virtual reality (VR) terminal, an augmented reality (AR) terminal, an industrial control (industrial control) Wireless terminals in, self-driving (self-driving), wireless terminals in remote medical, wireless terminals in smart grid, wireless terminals in transportation safety, Wireless terminals in a smart city, wireless terminals in a smart home, etc.
  • the terminal device 101 shown in this application may include a UE as shown in FIG. 3.
  • the terminal device can also access the DN through the operator's network, and use the operator's service deployed on the DN and/or the service provided by a third party.
  • the aforementioned third party may be a service party other than the operator's network and terminal equipment, and may provide other services such as data and/or voice for the terminal equipment.
  • the specific form of expression of the above-mentioned third party can be determined according to actual application scenarios and is not limited here.
  • the mobility management network element shown above is the control plane network element provided by the operator network, and is responsible for the access control and mobility management of the terminal device when accessing the operator network, for example, including the management of the mobile status and the allocation of temporary user identification. Functions such as authentication and authorization of users.
  • mobility management network elements can be AMF network elements.
  • future communications such as the 6th generation (6G)
  • mobility management network elements can still be AMF network elements, or have other names. The application is not limited.
  • the above-mentioned session management network element is a control plane network element provided by an operator network, and is responsible for managing a protocol data unit (PDU) session of a terminal device.
  • the PDU session is a channel used to transmit PDUs, and terminal devices need to transmit PDUs to each other through the PDU session and the DN.
  • the PDU session is established, maintained, and deleted by the SMF network element.
  • SMF network elements include session management (such as session establishment, modification, and release, including tunnel maintenance between UPF and RAN), UPF network element selection and control, service and session continuity (Service and Session Continuity, SSC) mode selection, Session-related functions such as roaming.
  • the session management network element may be an SMF network element.
  • future communications such as 6G, the session management network element may still be an SMF network element or have other names, which is not limited in this application.
  • the above-mentioned user plane function network element (or referred to as the user plane network element) is a gateway provided by an operator, and is a gateway for communication between the operator's network and the DN.
  • UPF network elements include user plane-related functions such as data packet routing and transmission, packet inspection, service usage reporting, quality of service (QoS) processing, lawful monitoring, upstream packet inspection, and downstream packet storage.
  • QoS quality of service
  • the user plane network element may be a UPF network element.
  • future communications such as 6G, the user plane network element may still be a UPF network element or have other names, which is not limited in this application.
  • the above strategy control network element is a control plane function provided by the operator, and is used to provide a PDU session strategy to the SMF network element.
  • Policies can include charging-related policies, QoS-related policies, and authorization-related policies.
  • the policy control network element may be a PCF network element.
  • future communications such as 6G, the policy control network element may still be a PCF network element or have other names, which is not limited in this application.
  • Access network equipment refers to equipment that provides wireless communication functions for terminals.
  • Access network equipment includes, but is not limited to: next-generation base stations (gnodeB, gNB) in 5G, evolved node B (evolved node B, eNB), radio network controller (RNC), node B (node B) B, NB), base station controller (BSC), base transceiver station (base transceiver station, BTS), home base station (for example, home evolved nodeB, or home node B, HNB), baseband unit (baseBand unit, BBU), transmission point (transmitting and receiving point, TRP), transmission point (transmitting point, TP), mobile switching center, etc.
  • next-generation base stations gnodeB, gNB
  • 5G evolved node B (evolved node B, eNB), radio network controller (RNC), node B (node B) B, NB), base station controller (BSC), base transceiver station (base transceiver station, BTS),
  • the access network equipment can include a master base station (master gNB, MgNB) and a secondary base station (secondary gNB, SgNB).
  • master gNB master gNB
  • secondary gNB secondary gNB
  • the primary base station and the secondary base station provide services for the same UE. It can interact with the control plane of the core network.
  • the primary base station can communicate with the AMF through the N2 interface, and the secondary base station does not interact with the control plane (there is no N2 connection between the secondary base station and the AMF) and is only used for business Transmission of traffic.
  • the primary base station described in the present application includes but is not limited to the primary base station in the established dual connectivity architecture, and may also include the access network equipment as the primary base station in the dual connectivity architecture to be established.
  • the secondary base stations described in this application include, but are not limited to, secondary base stations in a dual connectivity architecture that has been established, and can also include access network equipment as secondary base stations in a dual connectivity architecture to be established.
  • the network can maintain two connections through the primary base station and the secondary base station: the user plane path of the first connection includes the connection between the UE and the primary base station and the connection between the primary base station and UPF1 , The user plane path of the second connection includes the connection between the UE and the secondary base station and the connection between the secondary base station and UPF2.
  • the two connections access the same data network, such as accessing the same data network name (data network name, DNN) data network.
  • DNN data network name
  • the two connections can be called redundant connections.
  • the above-mentioned connection may refer to a PDU session.
  • future communications such as 6G, the above-mentioned connection may still be a PDU session or have other names, which is not limited by this application.
  • the UE shown in Figure 3 can access the data network through the primary base station and UPF1 through the first PDU session. At the same time, the UE can access data through the secondary base station and UPF2 through the second PDU session.
  • the internet Among them, UPF1 is selected by SMF1, and SMF1 is responsible for establishing the first PDU session. UPF2 is selected by SMF2, and SMF2 is responsible for establishing the second PDU session.
  • the architecture shown in FIG. 3 is only an example. This application does not exclude that the first PDU session and the second PDU session are both established by the same SMF. At this time, UPF1 and UPF2 are both selected by the SMF, and UPF1 and UPF2 It can be connected to the SMF through the N4 interface respectively.
  • Namf, Nsmf, Xn, N2, N3, N4, and N6 are interface serial numbers.
  • the meaning of these interface serial numbers can refer to the meaning defined in the 3GPP standard protocol, which is not limited here.
  • AMF network elements are referred to as AMF
  • SMF network elements are referred to as SMF
  • RAN equipment is referred to as RAN
  • UE terminal equipment
  • the network device 102 shown in FIG. 1 above can be used as the primary base station and/or the secondary base station in the 5G wireless communication system shown in FIG. 3, and the terminal device 101 can access the network through the network device 102.
  • this application provides a method for establishing a user interface.
  • the primary base station can request the network side to establish a connection of the user plane path through the secondary base station, and send the information of the secondary base station to the network side, so that the network side session control network element selects the appropriate user plane network element according to the information of the secondary base station , And establish the user plane path of the connection according to the user plane network element, so that in the process of establishing the connection, the session control network element can select the user plane network element according to the information of the secondary base station.
  • the information of the primary base station selects the user plane network element, and the path between the selected user plane network element and the secondary base station is better, thereby optimizing the path of the connection on the user plane and improving the connection quality.
  • the session management network element as the SMF and the user plane network element as the UPF as an example, the methods provided in the embodiments of the present application are respectively introduced through embodiments.
  • the method provided by the embodiment of the present application may include the following steps:
  • the primary base station sends a first request, where the first request is used to request the establishment of a first PDU session.
  • the first request may be sent by the terminal device, and the first request is forwarded or transparently transmitted to the AMF via the main base station, and sent from the AMF to the SMF. Accordingly, the SMF receives the first request.
  • the primary base station sends information of the secondary base station.
  • the information of the secondary base station can be sent by the primary base station to the AMF, and sent from the AMF to the SMF.
  • the SMF receives the information of the secondary base station.
  • the timing for the primary base station to send the information of the secondary base station is not limited. It can be sent before the primary base station sends the first request, after the primary base station sends the first request, or when the primary base station sends the first request. Information of the secondary base station.
  • the SMF selects the first UPF according to the information of the secondary base station, and the first UPF serves the first PDU session.
  • the first UPF serving the first PDU session includes that the first UPF is the session anchor UPF of the first PDU session, that is, PDU session anchor, or the first UPF is an intermediate UPF, that is, intermediate UPF.
  • the SMF sends the tunnel information (tunnel information) of the first UPF and the second information to the primary base station.
  • the information of the first UPF can be sent by SMF to AMF, and sent by AMF to the primary base station, and then the primary base station sends the information of the first UPF to the secondary base station.
  • the second information may be used to indicate the user plane for establishing the first connection through the secondary base station.
  • the primary base station may determine to send the tunnel information of the first UPF to the secondary base station based on the second information.
  • the second information may include redundancy sequence number (RSN) information (such as the value of RSN) of the first session.
  • RSN redundancy sequence number
  • the RSN information of the PDU session can be used to indicate the user plane path of the redundant PDU session under dual connectivity, and whether the user plane of the PDU session passes through the primary base station or the secondary base station.
  • the SMF may send the RSN information of the first PDU session in the first request as the second information to the primary base station, or the SMF may query the RSN information of the first PDU session according to the first request.
  • the SMF sends the tunnel information of the secondary base station to the first UPF. Based on the above steps, the first UPF obtains the tunnel information of the secondary base station, and the secondary base station obtains the tunnel information of the first UPF, so that the user plane path of the first PDU session can be established between the secondary base station and the first UPF.
  • the SMF can select the first UPF served by the first PDU session according to the information of the secondary base station, and establish the user plane path of the first PDU session according to the first UPF.
  • the user plane path of a PDU session includes the connection between the terminal equipment and the secondary base station and the connection between the secondary base station and the first UPF.
  • the primary base station may carry the information of the primary base station in the first request in the process of sending the first request.
  • the information of the primary base station includes information that can be used to indicate the location of the primary base station, such as The identity, the identity of the cell of the primary base station, or some or all of the information in the tunnel information of the primary base station, and the tunnel information of the primary base station can be allocated by the primary base station.
  • the information of the primary base station can be used for SMF to select a UPF, so as to establish a PDU session according to the selected UPF, so as to optimize the user plane path of the PDU session via the primary base station.
  • the information of the secondary base station involved in the above process can be used to indicate the location or identity of the secondary base station.
  • the information of the secondary base station can include the cell information of the secondary base station (such as cell id), or the tunnel information of the secondary base station, or
  • the information of the base station may include the identification of the secondary base station node (RAN node id) or the identification of the tracking area where the secondary base station node is located, such as tracking area id (track area id, TAI).
  • SMF can select UPF according to the cell information of the secondary base station or the TAI where the secondary base station node is located, so as to optimize the connection quality between the secondary base station and the UPF, for example, select the UPF with the closest geographic distance to the secondary base station, To reduce transmission delay. For another example, according to the identifier of the selected secondary base station node or the identifier of the cell of the secondary base station, the UPF with the smallest delay with the secondary base station is selected, or the UPF with the best QoS is selected.
  • the tunnel information of the secondary base station contains information about the cell of the secondary base station or the identifier of the secondary base station node or the tracking area identifier where the secondary base station node is located, so that the SMF can be based on the cell information of the secondary base station or the secondary base station node. Select UPF for the TAI information.
  • the SMF can also receive the tunnel information of the secondary base station before the step shown in S105 above. At this time, the tunnel information of the secondary base station can be sent by the primary base station to the SMF via AMF. .
  • the above method can be applied to the establishment of redundant PDU sessions.
  • the SMF may indicate to the primary base station that a redundant PDU session needs to be established. Based on the instruction, the primary base station selects the secondary base station and sends the secondary base station’s information to the SMF. The information is used by the SMF to select the first UPF according to the information of the secondary base station.
  • the UE in the dual connectivity scenario, can access different UPFs through the primary base station and the secondary base station, and access the same data network through the different UPFs, thereby accessing the data through two different PDU sessions
  • the user plane path of one PDU session includes the connection between the UE and the primary base station and the connection between the primary base station and a UPF
  • the user plane path of the other PDU session includes the connection between the UE and the secondary base station and the secondary base station
  • these two PDU sessions can be called redundant PDU sessions (or redundant connections or redundant sessions, or sometimes also called redundant paths).
  • this application does not limit the foregoing method to be only applied to the establishment of a redundant PDU session, and the above example is only an example and should not be understood as a limitation of the application.
  • the above method can also be used in a scenario where a PDU session via a secondary base station needs to be established under a dual-connected architecture. Under the dual-connected architecture, two PDU sessions need to be established respectively, and the two PDU sessions go through the primary base station and the secondary base station respectively.
  • the base station can establish a PDU session via the secondary base station according to the method described in this application.
  • the SMF can send an instruction to the primary base station to make the primary base station select the secondary base station and feed back the information of the secondary base station to the SMF.
  • a redundant PDU session needs to be established based on a second request, where the second request is used to request SMF to establish a second PDU session, and the second PDU session may be used for the terminal device to connect to the same data network, or In other words, the second session and the first session access a data network with the same DNN.
  • the second request is used to request SMF to establish a second PDU session
  • the second PDU session may be used for the terminal device to connect to the same data network, or
  • the second session and the first session access a data network with the same DNN.
  • the RAN first creates a dual connection, then establishes the first PDU session, and finally establishes the second PDU session; in another example, the RAN first creates the dual connection, then establishes the second PDU session, and finally establishes the first PDU session; In another example, the second PDU session is established first, then the RAN establishes a dual connection, and finally the first PDU session is established.
  • the SMF can send the first information to the primary base station.
  • the first information may include RSN information of the second session.
  • the SMF may send the RSN information of the second PDU session in the second request to the primary base station.
  • the SMF can query the network according to the DNN of the second PDU session in the second request and the network slice selection assistance information (S-NSSAI)
  • S-NSSAI network slice selection assistance information
  • the subscription information of the slice obtains the RSN information of the second PDU session from the subscription information.
  • the SMF may determine the RSN information of the first PDU session after determining that the session requires redundant processing according to the subscription information.
  • the first information may include information for indicating the establishment of the user plane of the second PDU session through the primary base station (here, the primary base station after the dual connection is established), so that the information may indicate that the second PDU session needs to be redundant. Otherwise, the information can be indicated by a specific message and/or a specific bit configured to a specific value.
  • the first information may include information for indicating that redundancy processing is required for the second PDU session, and the information may be indicated by a specific message and/or a specific bit configured to a specific value.
  • the primary base station sends a second request to the SMF.
  • the second request is used to request the establishment of a second PDU session. If it is determined according to the second request that the second PDU session needs to be redundant Processing, the SMF can send the above first information to the master base station.
  • the second request may include RSN information of the second PDU session, and/or, the second request may include the DNN and S-NSSAI of the second PDU session.
  • the method for SMF to determine that the second PDU session needs to be processed redundantly refer to the introduction when the SMF determines that the first PDU session needs to be processed redundantly.
  • the primary base station may select the secondary base station to establish the dual connection based on the first information, or only select the secondary base station to pre-establish the dual connection, and send the information of the secondary base station to the SMF for the SMF to select the first UPF according to the information of the secondary base station.
  • SMF may select the secondary base station to establish dual connections after establishing the second PDU session, and send the information of the secondary base station to the AMF, and the AMF may send the information of the secondary base station to the SMF, including when the first PDU session is established, the AMF will The information of the secondary base station is sent to the SMF.
  • the AMF may request the primary base station to report the information of the secondary base station after determining that the UE enters the dual connectivity mode. SMF can subscribe to the AMF location report service, and the AMF will notify the SMF after receiving the information from the secondary base station.
  • the SMF sends second information to the primary base station to instruct to establish the first connection through the secondary base station. Of the user interface.
  • the above second information may include RSN information of the first session.
  • the SMF may send the RSN information of the first PDU session in the first request as the second information to the primary base station.
  • the SMF may query the subscription information of the network slice according to the DNN and S-NSSAI of the first PDU session in the first request, and obtain the first PDU from the subscription information
  • the RSN information of the session, or, after determining that the session requires redundant processing according to the subscription information, the RSN information of the first PDU session is determined from the subscription information.
  • the second information may include information used to indicate that the user plane of the first PDU session is established through the secondary base station (here, the secondary base station after the dual connection is established), so that the second information may be used to indicate that the first PDU session requires Redundant processing is performed, and the information can be indicated by a specific message and/or a specific bit configured to a specific value.
  • the second information may include information used to indicate that the first PDU session needs to perform redundancy processing, and the information may be indicated by a specific message and/or a specific bit configured to a specific value.
  • the primary base station may select the secondary base station and establish a dual connection based on the second information.
  • the primary base station only selects the secondary base station to pre-establish the dual connection, and sends the information of the secondary base station to the SMF for the SMF to select the first UPF according to the information of the secondary base station.
  • the primary base station may select the secondary base station to establish dual connections after establishing the second PDU session, and send the secondary base station information to the AMF.
  • the AMF may send the secondary base station information to the SMF, including when the first PDU session is established, the AMF Send the information of the secondary base station to the SMF.
  • the AMF may request the primary base station to report the information of the secondary base station after determining that the UE enters the dual connectivity mode.
  • SMF can subscribe to the AMF location report service, and the AMF will notify the SMF after receiving the information from the secondary base station.
  • the primary base station can create dual connectivity before the second PDU session is established.
  • the AMF can request the primary base station to report the information of the secondary base station.
  • the AMF receives the secondary base station reported by the primary base station. Base station information.
  • SMF can subscribe to the AMF location report service, and the AMF will notify the SMF after receiving the information from the secondary base station.
  • SMF or other network elements may be used to determine whether a redundant PDU session needs to be established.
  • the SMF may determine whether the second PDU session needs to establish a redundant PDU session according to the above second request. And/or, the SMF may determine whether a redundant PDU session needs to be established for the first PDU session according to the first request.
  • the following takes the first request as an example to describe the manner of determining whether a redundant PDU session needs to be established.
  • the method for determining whether a redundant PDU session needs to be established according to the second request please refer to the description here.
  • the first request may carry the first redundant session indication, for example, the RSN information of the first session.
  • the redundancy indication it can be determined that the first PDU session needs to perform redundancy processing.
  • the association relationship between the RSN information of the two PDU sessions that are redundant PDU sessions with each other can be learned according to the configuration, so that it can be determined whether there is a session associated with the RSN information of the first PDU session according to the association relationship. If the RSN information exists, it is determined that the first PDU session needs to be redundantly processed. For example, it is known that the session whose RSN information is RSN_1 and the session whose RSN information is RSN_2 are mutually redundant sessions. When the RSN information carried in the first request is RSN_1, it can be determined that the first PDU session needs to be redundantly processed.
  • the SMF when judging whether a redundant PDU session needs to be established according to the first request, the SMF does not need to perceive the association relationship between the RSN information in the first request and other RSN information, and can directly pass the first request and/ Or the presence of the RSN information in the second request can determine that the session needs redundant processing.
  • the RSN information is a specific message and/or a specific bit indication configured to a specific value.
  • the RSN information in the first redundant session indication may be the same as the RSN information in the first information.
  • the first request may carry the DNN of the data network that is requested to be accessed and the information of the network slice that is requested to be accessed, such as S-NSSAI.
  • the SMF can determine whether the first PDU session needs to be redundantly processed according to the DNN and S-NSSAI of the first PDU session. For example, SMF can query the subscription information of the network slice according to DNN and S-NSSAI, and determine whether redundancy processing is needed for the first connection. If the subscription information indicates that DNN is DNN_1, S-NSSAI is S-NSSAI_1, the session and DNN are DNN_2 , S-NSSAI is S-NSSAI_2 and the sessions are mutually redundant sessions.
  • DNN_1 and DNN_2 can be the same, or S-NSSAI_1 and S-NSSAI_2 can be the same.
  • the SMF may also receive the information of the primary base station, so that the SMF can determine that there is a dual connection based on the information of the primary base station and the information of the secondary base station, and then determine that a redundant PDU session needs to be established.
  • the receiving information of the primary base station and the information of the secondary base station may be at different time points, or may be in different messages.
  • the SMF may determine that the first PDU session needs redundant processing, and/or establish the user plane of the first PDU session through the secondary base station. For example, when the SMF receives the information of the primary base station and the information of the secondary base station at the same time, if the SMF determines that the user plane of the first PDU session is established through the secondary base station, the SMF may select the first UPF according to the information of the secondary base station.
  • Step S103 the SMF selects the first UPF according to the information of the secondary base station, and further includes: the SMF determines that the first PDU session needs to establish the user plane of the first PDU session through the secondary base station, and the SMF selects the first UPF according to the information of the secondary base station.
  • step S102 the AMF determines that the first PDU session needs to establish the user plane of the first PDU session through the secondary base station according to the configuration or subscription information, and the AMF only sends the information of the secondary base station to the SMF.
  • the information selects UPF.
  • SMF does not need to determine whether to use the information of the primary base station or the secondary base station to select the UPF.
  • the SMF may also determine that the first PDU session needs to be redundantly processed according to the policy configured on the SMF or the policy provided by the PCF, which is not specifically limited in this application.
  • a method for establishing a user plane may include the steps shown in FIG. 5:
  • the UE sends a session establishment request (corresponding to the second request in the above method embodiment, hereinafter referred to as the second request) to the AMF through the primary base station.
  • the second request is used to request the establishment of a PDU session ( Corresponding to the second PDU session in the foregoing method embodiment, hereinafter referred to as the second PDU session).
  • the primary base station plays a role of transparent transmission in the process of sending the second request.
  • the primary base station in the process of transparently transmitting the second request to the AMF, the primary base station also encapsulates the information of the primary base station, such as one or more of the identity of the primary base station, the identity of the cell of the primary base station, or the tunnel information of the primary base station.
  • S202 The AMF sends the second request to SMF1. Accordingly, SMF1 receives the second request.
  • the SMF1 determines that the second PDU session needs to perform redundancy processing. Specifically, when the second request carries the second redundant session indication, the SMF1 may determine, according to the second redundant session indication, that the second PDU session needs to perform redundant processing. Alternatively, when the second request does not carry the second redundant session indication, the SMF1 may query the subscription information to determine the RSN information of the second PDU session according to the DNN and S-NSSAI of the second PDU session carried in the second request. Exemplarily, SMF1 may also select UPF and establish a second PDU session based on the second request. For example, when the second request includes the information of the primary base station, SMF1 may select UPF1 according to the information of the primary base station, and establish the UE and the primary base station as well as User plane connection between the primary base station and UPF1.
  • SMF1 sends the first information to AMF.
  • the first information may be used to indicate the user plane for establishing the second PDU session through the primary base station.
  • the first information may include a second redundant session indication, such as the RSN information of the second PDU session, and SMF1 may include the RSN information of the second PDU session included in the second request in the first information, or,
  • the SMF1 may query the subscription information to determine the RSN information of the second PDU session according to the DNN and S-NSSAI of the second PDU session carried in the second request.
  • the AMF receives the first information.
  • the AMF sends the first information to the main base station.
  • the primary base station receives the first information.
  • the primary base station selects a secondary base station in response to the first information.
  • the primary base station may establish dual connections through the secondary base station after selecting the secondary base station.
  • the secondary base station is selected to establish the dual connection, or only the secondary base station is selected to pre-establish the dual connection.
  • the pre-establishment of the dual connection includes that the primary base station first selects a suitable secondary base station to prepare for the subsequent establishment of the dual connection, but does not complete the establishment of the dual connection.
  • the primary base station carries the information of the secondary base station in the N2 message, and sends the message to the AMF.
  • the information of the secondary base station described herein may include location information of the secondary base station, such as the identifier of the secondary base station, the identifier of the cell of the secondary base station, and/or the tunnel information of the secondary base station.
  • the AMF receives the information of the secondary base station.
  • the AMF stores the information of the secondary base station.
  • the AMF obtains the information of the secondary base station during the process of creating the second PDU session.
  • the primary base station sends the information of the secondary base station to the AMF.
  • the AMF may request the primary base station to report the information of the secondary base station after determining that the UE enters the dual connectivity mode.
  • SMF1 may subscribe to the location report service of AMF, and AMF will notify SMF1 after receiving the information from the secondary base station.
  • the AMF may also send the information of the secondary base station to the second SMF, including when the first PDU session is established, the AMF sends the information of the secondary base station to the second SMF.
  • the primary base station can create dual connectivity before the second PDU session is established. After the UE enters the dual connectivity mode, the AMF can request the primary base station to report the information of the secondary base station. Correspondingly, the AMF receives the information reported by the primary base station. Information of the secondary base station. SMF can subscribe to the AMF location report service, and the AMF will notify the SMF after receiving the information from the secondary base station.
  • the UE sends a session establishment request (corresponding to the first request in the above method embodiment, hereinafter referred to as the first request) to the AMF through the primary base station, and the first request is used to request the establishment of a PDU session ( Corresponding to the first PDU session in the foregoing method embodiment, hereinafter referred to as the first PDU session).
  • the first request may carry the indication of the first redundant session, for example, the redundant sequence number information of the first PDU session (such as the value of RSN), or the first request may carry the DNN requesting the first PDU session and the network slice Information, such as S-NSSAI.
  • the primary base station plays a role of transparent transmission in the process of sending the first request. Accordingly, the AMF receives the first request.
  • S210 The AMF sends the first request and the information of the secondary base station to SMF2.
  • SMF2 receives the second request and the information of the secondary base station.
  • SMF2 and SMF1 are the same SMF, or SMF2 and SMF1 are different SMFs.
  • the AMF may query the information of the secondary base station after determining that the UE is in the dual connectivity mode, and send the first request and the information of the secondary base station to SMF2.
  • the manner in which the AMF obtains the information of the secondary base station is as described in S208, which will not be repeated here.
  • the AMF can obtain the information of the secondary base station before step S209 or can be queried in real time in step S209, which is not limited in the present invention.
  • the AMF may send the first request and the information of the secondary base station to the SMF2 through one message, or may separately send the first request and the information of the secondary base station through different messages.
  • SMF2 selects UPF according to the information of the secondary base station, and UPF provides service for the first PDU session.
  • SMF2 selects the first UPF according to the information of the secondary base station, including: SMF2 determines that the first PDU session needs to establish the user plane of the first PDU session through the secondary base station, and SMF2 selects the first UPF according to the information of the secondary base station.
  • S212 An N4 session is established between SMF2 and UPF, and the tunnel information of the UPF is allocated by SMF2 or UPF.
  • the SMF2 sends the UPF tunnel information and the second information to the primary base station via the AMF.
  • the primary base station receives the tunnel information of the UPF.
  • the second information may include RSN information of the first PDU session.
  • the RSN information may be obtained from the first request, or the subscription information may be queried according to the first request, and the RSN information of the first PDU session may be obtained from the subscription information.
  • the primary base station sends the tunnel information of the UPF to the secondary base station.
  • the primary base station sends the tunnel information of the secondary base station to the AMF.
  • the AMF receives the tunnel information of the secondary base station.
  • Step S216 The AMF sends the tunnel information of the secondary base station to SMF2.
  • Steps S215-S216 are optional. Specifically, when the information of the secondary base station involved in the step S210 includes the tunnel information of the secondary base station, the steps shown in S215-S216 may not be executed.
  • SMF2 sends the information of the secondary base station to the UPF.
  • the tunnel information of the secondary base station may be included in the information of the secondary base station received by SMF2 in S210, or may be sent by AMF in the step shown in S206. So far, the user plane path establishment process of the first PDU session is completed.
  • another method for establishing a user plane may include the steps shown in FIG. 6:
  • the UE sends a session establishment request to the AMF through the primary base station (corresponding to the first request in the above method embodiment, hereinafter referred to as the first request).
  • the first request is used to request the establishment of a PDU session ( Corresponding to the first PDU session in the foregoing method embodiment, hereinafter referred to as the first PDU session).
  • the first request may carry a first redundant session indication, for example, redundant sequence number information of the first session (such as the value of RSN), or the first request may carry DNN and network slice information of the first PDU session, Such as S-NSSAI.
  • the primary base station plays a role of transparent transmission in the process of sending the first request.
  • the primary base station in the process of transparently transmitting the second request to the AMF, also encapsulates the information of the primary base station, for example, including the identity of the primary base station, the identity of the cell of the primary base station, or part of the tunnel information of the primary base station Or all information.
  • the AMF sends the first request to the SMF. Accordingly, the SMF receives the first request.
  • the SMF determines that the first PDU session requires redundancy processing. Exemplarily, when the information of the primary base station is included in the first request, the SMF may select the UPF (hereinafter referred to as UPF1) serving the first PDU session according to the information of the primary base station.
  • UPF1 the UPF serving the first PDU session according to the information of the primary base station.
  • the SMF sends the second information to the AMF.
  • the second information may be used to indicate the user plane for establishing the first PDU session through the secondary base station.
  • the second information may include the first redundant session indication, for example, the RSN information of the first PDU session, and the SMF may carry the RSN information of the first PDU session included in the first request in the second information, or, When the first request does not include the RSN information, the SMF may query the subscription information to determine the RSN information of the first PDU session according to the DNN and S-NSSAI of the first PDU session carried in the first request. Accordingly, the AMF receives the second information.
  • the AMF sends the second information to the main base station.
  • the main base station receives the second information.
  • the primary base station selects a secondary base station in response to the second information.
  • the primary base station may establish dual connections through the secondary base station after selecting the secondary base station.
  • the secondary base station is selected to establish the dual connection, or only the secondary base station is selected to pre-establish the dual connection.
  • the pre-establishment of the dual connection includes that the primary base station first selects a suitable secondary base station to prepare for the subsequent establishment of the dual connection, but does not complete the establishment of the dual connection.
  • the primary base station carries the information of the secondary base station in the N2 message, and sends the message to the AMF.
  • the information of the secondary base station described herein may include the location information of the secondary base station, such as the identity of the cell including the secondary base station, and/or the tunnel information of the secondary base station.
  • the AMF receives the information of the secondary base station.
  • the AMF sends the information of the secondary base station to the SMF. Accordingly, the SMF receives the information of the secondary base station.
  • the SMF selects the UPF (hereinafter referred to as UPF2) that serves the first PDU session according to the information of the secondary base station.
  • UPF2 the UPF
  • the SMF may re-select the UPF serving the first PDU session from UPF1 to UPF2; or, the SMF may insert an intermediate UPF (intermediate UPF) and use it as UPF2.
  • S310 An N4 session is established between SMF and UPF2, and the tunnel information of UPF2 is allocated by SMF or UPF2. Specifically, for a situation where the UPF that SMF will provide services for the first PDU session is reselected from UPF1 to UPF2, SMF or UPF2 may allocate UPF2's N3 session uplink tunnel information. For the case where SMF is inserted into the intermediate UPF, SMF or UPF2 can allocate the uplink tunnel information of the N3 session of UPF2, and the SMF can also establish a connection between UPF2 and UPF1, such as the N9 connection, and SMF or UPF2 can allocate the downlink tunnel information of the N9 session. In addition, if the information of the secondary base station received by the SMF in S308 includes the tunnel information of the secondary base station, in the implementation of S310, the SMF may send the tunnel information of the secondary base station to UPF2.
  • the SMF sends a session update request or a session release request to UPF1. Specifically, for the situation where the UPF that the SMF will provide services for the first PDU session is reselected from UPF1 to UPF2, the SMF may send a session release request to UPF1 to release the resources corresponding to UPF1. In the case where the SMF is inserted into the intermediate UPF, the SMF may send a session update request to UPF1, which may carry the downlink tunnel information of the N9 session of UPF2.
  • the SMF sends the N3 uplink tunnel information of UPF2 and the second information to the master base station via the AMF.
  • the primary base station receives the tunnel information of UPF2.
  • the primary base station sends the N3 uplink tunnel information of UPF2 to the secondary base station.
  • S314 The primary base station sends the tunnel information of the secondary base station to the AMF.
  • the AMF receives the tunnel information of the secondary base station.
  • Steps S314-S315 The AMF sends the tunnel information of the secondary base station to the SMF. Steps S314-S315 are optional. Specifically, when the information of the secondary base station involved in the step shown in S308 includes the tunnel information of the secondary base station, the steps shown in S314-S315 may not be executed.
  • S316 The SMF sends the information of the secondary base station to UPF2.
  • the tunnel information of the secondary base station may be included in the information of the secondary base station received by SMF2 in S210, or may be sent by AMF in the step shown in S206. So far, the user plane path establishment process of the first PDU session is completed.
  • an embodiment of the present application also provides a communication device, which may include the session control network element, the primary base station, or the access and mobility management network element in the above method embodiment.
  • a communication device which may include the session control network element, the primary base station, or the access and mobility management network element in the above method embodiment.
  • One or more of the functions can be used to perform the corresponding steps provided in the above method embodiments.
  • the functions can be realized by hardware, or by software or hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above-mentioned functions.
  • the communication device 700 shown in FIG. 7 can be used as the session control network element involved in the above method embodiment (including the SMF described in the above method embodiment), and executes the above method embodiment. Steps performed by the session control network element.
  • the communication device 700 may include a communication module 701 and a processing module 702, and the communication module 701 and the processing module 702 are coupled with each other.
  • the communication module 701 can be used to support communication by the communication device
  • the processing module 702 can be used for the communication device to perform processing operations, such as generating information/messages that need to be sent, or processing signals received by the communication module 701 to obtain information/messages.
  • the processing module 702 may also be used to support the communication device 700 to execute the processing actions in the foregoing method embodiments.
  • the communication module 701 may be used to receive a first request, which is used to request the establishment of a first connection, and to receive information of a secondary base station; the processing module 702 may be used to receive information according to the secondary base station Select the first user plane network element, and the first user plane network element serves the first connection; the communication module 701 can also send the tunnel information and second information of the first user plane network element to the host A base station, where the second information is used to indicate that the user plane of the first connection passes through the secondary base station. The communication module 701 may also send the tunnel information of the secondary base station to the first user plane network element.
  • the information of the secondary base station includes some or all of the tunnel information of the secondary base station, the identifier of the secondary base station, or the identifier of the cell of the secondary base station.
  • the communication module 701 may also receive the tunnel information of the secondary base station.
  • the communication module 701 may also receive a second request from the main base station, and the second request is used to request the establishment of a second connection; if the second connection requires redundancy processing, the communication module 701 may send first information to the primary base station, where the first information is used to indicate a user plane for establishing the second connection through the primary base station.
  • the communication module 701 may send second information to the primary base station, where the second information is used to indicate that the secondary base station establishes the The user plane of the first connection.
  • the first request includes information of the primary base station
  • the processing module 702 may also determine a second user plane network element according to the information of the primary base station, and the second user plane network element serves In the first connection; in selecting the first user plane network element according to the information of the secondary base station, the processing module 702 may reselect the first user plane network element to serve the second base station according to the information of the secondary base station A connection; or, the processing module 702 may insert the first user plane network element between the secondary base station and the second user plane network element, where the first user plane network element is an intermediate user plane network element.
  • the information of the primary base station includes some or all of the following information: the identity of the primary base station; or, the identity of the cell of the primary base station; or, the tunnel of the primary base station information.
  • the session control network element may be an SMF network element.
  • the user plane network element may be a UPF network element.
  • the access and mobility management network element may be an AMF network element.
  • the first connection may be a PDU session.
  • the communication device provided in the embodiment of the present application may also be composed of hardware components, such as a processor, a memory, or a transceiver.
  • the communication device 800 may include a transceiver 801, a memory 802, and a processor 803.
  • the transceiver 801 can be used for communication with a communication device, for example, for sending or receiving signals.
  • the memory 802 is coupled with the processor 803, and is used to store programs and data necessary for the communication device 800 to implement various functions.
  • the processor 803 is configured to support the communication device 800 to perform corresponding processing functions in the foregoing method, such as generating information and messages sent by the transceiver 801, and/or demodulating and decoding signals received by the transceiver 801, and so on.
  • the above memory 802 and the processor 803 may be integrated or independent of each other.
  • the transceiver 801 may be an interface, such as an interface used for communication between network elements in a core network.
  • the above memory 802 may also be externally connected to the communication device 800.
  • the communication device 800 may include a transceiver 801 and a processor 803.
  • the above transceiver 801 may also be externally connected to the communication device 800.
  • the communication device 800 may include a memory 802 and a processor 803.
  • the communication device 800 may include the processor 803.
  • the steps executed by the above processing module 702 can be executed by the processor 803, and the steps executed by the above communication module 701 can be executed by the transceiver 801.
  • the communication device 800 includes the memory 802, the memory 802 may be used to store a program for the processor 803 to execute the program to perform the steps performed by the processing module 702 above.
  • the communication device 900 shown in FIG. 9 may be used as the primary base station involved in the foregoing method embodiment, and perform the steps performed by the primary base station in the foregoing method embodiment.
  • the communication device 900 may include a communication module 901 and a processing module 902, and the communication module 901 and the processing module 902 are coupled with each other.
  • the communication module 901 can be used to support the communication device to communicate
  • the processing module 902 can be used for the communication device to perform processing operations, such as generating information/messages to be sent, or processing signals received by the communication module 901 to obtain information/messages.
  • the processing module 902 may also be used to support the communication device 900 to execute the processing actions in the foregoing method embodiments.
  • the communication module 901 can be used to send a first request, the first request is used to request the establishment of a first connection; the communication module 901 can also send information of the secondary base station; the communication module 901 can also receive the first request Tunnel information and second information of a user plane network element, where the first user plane network element serves the first connection, and the second information is used to indicate that the user plane of the first connection passes through the secondary base station ; The communication module 901 may also send the tunnel information of the first user plane network element to the secondary base station.
  • the information of the secondary base station includes some or all of the tunnel information of the secondary base station, the identifier of the secondary base station, or the identifier of the cell of the secondary base station.
  • the communication module 901 may also send the tunnel information of the secondary base station to the access and mobility management network element.
  • the processing module 902 may be used to select a secondary base station, and establish a dual connection through the secondary base station.
  • the communication module 901 can also send a second request, the second request is used to request the establishment of a second connection; the communication module 901 can also receive the first information, the first information is used to indicate The primary base station establishes the user plane of the second connection.
  • the communication module 901 may also receive second information, where the second information is used to indicate the user plane for establishing the first connection through the secondary base station.
  • the first request includes information of the primary base station.
  • the information of the primary base station includes part or all of the following information: the identity of the primary base station; or, the identity of the cell of the primary base station; or, the tunnel information of the primary base station.
  • the session control network element may be an SMF network element.
  • the user plane network element may be a UPF network element.
  • the access and mobility management network element may be an AMF network element.
  • the first connection may be a PDU session.
  • the communication device 1000 may include a core network interface transceiver 1001, a memory 1002, a processor 1003, and an air interface transceiver 1004.
  • the core network interface transceiver 1001 can be used for communication with a communication device, for example, for sending or receiving signals.
  • the memory 1002 is coupled with the processor 1003, and is used to store programs and data necessary for the communication device 1000 to implement various functions.
  • the processor 1003 is configured to support the communication device 1000 to perform the corresponding processing functions in the above method, such as generating information and messages sent by the core network interface transceiver 1001, and/or performing processing on the signals received by the core network interface transceiver 1001 Demodulation and decoding and so on.
  • the above memory 1002 and the processor 1003 may be integrated or independent of each other.
  • the air interface transceiver 1004 may be used to support the communication device 1000 to receive and send signaling and/or data through a wireless air interface.
  • the core network interface transceiver 1001 may be a wired communication interface, such as an interface used to communicate with network elements in the core network.
  • the above memory 1002 may also be externally connected to the communication device 1000.
  • the communication device 1000 may include a core network interface transceiver 1001 and a processor 1003.
  • the above core network interface transceiver 1001 and air interface transceiver 1004 may also be externally connected to the communication device 1000.
  • the communication device 1000 may include a memory 1002 and a processor 1003.
  • the core network interface transceiver 1001, the memory 1002, and the air interface transceiver 1004 are all externally connected to the communication device 1000, the communication device 1000 may include the processor 1003.
  • the steps executed by the above processing module 902 can be executed by the processor 1003, and the steps executed by the above communication module 901 can be executed by the core network interface transceiver 1001.
  • the communication device 1000 includes the memory 1002, the memory 1002 may be used to store a program for the processor 1003 to execute the program to perform the steps performed by the processing module 902 above.
  • the communication device 1100 shown in FIG. 11 can be used as the access and mobility management function network element (including AMF) involved in the foregoing method embodiment, and executes the access and mobility management function network element in the foregoing method embodiment. Meta steps to perform.
  • the communication device 1100 may include a communication module 1101 and a processing module 1102, and the communication module 1101 and the processing module 1102 are mutually coupled.
  • the communication module 1101 can be used to support the communication device to communicate
  • the processing module 1102 can be used for the communication device to perform processing operations, such as generating information/messages to be sent, or processing signals received by the communication module 1101 to obtain information/messages.
  • the processing module 1102 may also be used to support the communication device 1100 to execute the processing actions in the foregoing method embodiments.
  • the communication module 1101 may be used to receive a first request from the main base station, and the first request is used to request the establishment of a first connection; the communication module 1101 may also send the first session control network element The first request; the communication module 1101 may also receive information of the secondary base station from the primary base station; the communication module 1101 may also receive the tunnel information of the first user plane network element and the second information from the first session control network element, and Send the tunnel information of the first user plane network element and the second information to the primary base station, where the second information is used to indicate that the user plane of the first connection passes through the secondary base station.
  • the information of the secondary base station includes some or all of the tunnel information of the secondary base station, the identifier of the secondary base station, or the identifier of the cell of the secondary base station.
  • the information of the secondary base station does not include the tunnel information of the secondary base station
  • the communication module 1101 may also receive the tunnel information of the secondary base station from the primary base station and send it to the first session control network.
  • the element sends the tunnel information of the secondary base station.
  • the access and mobility management network element may also receive a second request from the primary base station, and the second request is used to request a second connection to the first session control network element.
  • the second request is sent, and first information is received from the first session control network element, where the first information is used to indicate that the user plane of the second connection is established through the primary base station, and sends all the information to the primary base station. ⁇ Said first information.
  • the communication module 1101 may also receive a second request from the primary base station, where the second request is used to request the establishment of a second connection, and send the second request to the second session control network element, Receiving first information from the second session control network element, where the first information is used to indicate a user plane for establishing the first connection through the primary base station, and sending the first information to the primary base station.
  • the communication module 1101 may also receive second information from the first session control network element, where the second information is used to indicate the user who establishes the first connection through the secondary base station The communication module 1101 may also send the second information to the main base station.
  • the first request moment includes information of the primary base station.
  • the information of the primary base station includes some or all of the following information: the identity of the primary base station; or, the identity of the cell of the primary base station; or, the tunnel information of the primary base station.
  • both the first session control network element and the second session control network element may be SMF network elements.
  • the first session control network element and the second session control network element may be the same session control network element, or may be different session control network elements.
  • the user plane network element may be a UPF network element.
  • the access and mobility management network element may be an AMF network element.
  • the first connection and the second connection may be PDU sessions.
  • the communication device 1200 may include a transceiver 1201, a memory 1202, and a processor 1203.
  • the transceiver 1201 can be used for communication with a communication device, for example, for sending or receiving signals.
  • the memory 1202 is coupled with the processor 1203, and is used to store programs and data necessary for the communication device 1200 to implement various functions.
  • the processor 1203 is configured to support the communication device 1200 to perform the corresponding processing functions in the foregoing method, such as generating information and messages sent by the transceiver 1201, and/or demodulating and decoding signals received by the transceiver 1201, and so on.
  • the above memory 1202 and processor 1203 may be integrated or independent of each other.
  • the transceiver 1201 may be an interface, such as an interface used for communication between network elements in a core network.
  • the above memory 1202 may also be externally connected to the communication device 1200.
  • the communication device 1200 may include a transceiver 1201 and a processor 1203.
  • the above transceiver 1201 may also be externally connected to the communication device 1200.
  • the communication device 1200 may include a memory 1202 and a processor 1203.
  • the communication device 1200 may include the processor 1203.
  • the steps executed by the above processing module 1102 can be executed by the processor 1203, and the steps executed by the above communication module 1101 can be executed by the transceiver 1201.
  • the communication device 1200 includes the memory 1202, the memory 1202 may be used to store a program for the processor 1203 to execute the program to perform the steps performed by the processing module 1102 above.
  • each component in the above communication device may be integrated into a module, or may be a separate physical existence.
  • the above-mentioned integrated modules can be implemented in the form of hardware or software functional modules, and should not be construed as limited to the structure shown in the above drawings.
  • the embodiment of the application also provides a computer-readable storage medium on which a computer program is stored.
  • the program When the program is executed by a processor, the computer executes the above method embodiment and method implementation.
  • the present application also provides a computer program product, which when invoked and executed by a computer, enables the computer to implement the above method embodiment and any possible implementation of the method embodiment In the operation performed by the session management network element, the main base station, or the access and mobility management network element.
  • this application also provides a chip or chip system, which can be coupled with a transceiver, and used to implement the above method embodiment and any possible implementation of the method embodiment. Operations performed by management network elements, primary base stations, or access and mobility management network elements.
  • the chip system may include the chip.
  • this application also provides a communication system, which can be used to implement the above method embodiment, any one of the possible implementation manners of the method embodiment is composed of a session management network element, a master base station, or Operations performed by access and mobility management network elements.
  • the communication system has a structure as shown in FIG. 4.
  • These computer program instructions can also be stored in a computer-readable memory that can guide a computer or other programmable data processing equipment to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction device.
  • the device implements the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.
  • These computer program instructions can also be loaded on a computer or other programmable data processing equipment, so that a series of operation steps are executed on the computer or other programmable equipment to produce computer-implemented processing, so as to execute on the computer or other programmable equipment.
  • the instructions provide steps for implementing functions specified in a flow or multiple flows in the flowchart and/or a block or multiple blocks in the block diagram.

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Abstract

La présente invention concerne un procédé et un appareil d'établissement de plan utilisateur. Sur la base du procédé, une première demande, et des informations d'une station de base secondaire peuvent être reçues par un élément de réseau de commande de session, de telle sorte que, pendant le processus d'établissement d'une première connexion selon la première demande, l'élément de réseau de commande de session sélectionne un élément de réseau de plan utilisateur approprié en fonction des informations de la station de base secondaire, et établit un trajet de plan utilisateur connecté selon l'élément de réseau de plan utilisateur. Par conséquent, pendant le processus d'établissement d'une première connexion, un élément de réseau de commande de session peut sélectionner, selon des informations d'une station de base secondaire, un élément de réseau plan d'utilisateur pour établir une connexion de plan d'utilisateur, et par comparaison avec la solution dans l'état de la technique selon lequel un élément de réseau de commande de session sélectionne un élément de réseau de plan utilisateur en fonction d'informations d'une station de base principale, le trajet entre l'élément de réseau plan utilisateur sélectionné et une station de base secondaire est meilleur, de telle sorte que le trajet connecté à un plan utilisateur est optimisé, et la qualité de connexion est améliorée. La solution technique peut être appliquée à un scénario de connexion redondante.
PCT/CN2020/088475 2019-05-06 2020-04-30 Procédé et appareil d'établissement de plan utilisateur WO2020224555A1 (fr)

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Cited By (2)

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