WO2023165292A9 - 一种通信方法及装置 - Google Patents
一种通信方法及装置 Download PDFInfo
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- WO2023165292A9 WO2023165292A9 PCT/CN2023/074037 CN2023074037W WO2023165292A9 WO 2023165292 A9 WO2023165292 A9 WO 2023165292A9 CN 2023074037 W CN2023074037 W CN 2023074037W WO 2023165292 A9 WO2023165292 A9 WO 2023165292A9
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- WIPO (PCT)
- Prior art keywords
- network element
- user plane
- plane network
- information
- tunnel
- Prior art date
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- 101150069124 RAN1 gene Proteins 0.000 description 35
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1851—Systems using a satellite or space-based relay
- H04B7/18519—Operations control, administration or maintenance
-
- 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
- H04W40/00—Communication routing or communication path finding
- H04W40/34—Modification of an existing route
- H04W40/36—Modification of an existing route due to handover
Definitions
- the embodiments of the present application relate to the field of wireless communications, and in particular, to a communication method and device.
- Satellite communications can supplement some scenes that are difficult to cover with ground communications, such as deserts and oceans.
- it may involve deploying network elements originally deployed on the ground to satellites, such as deploying wireless access network (radio access network, RAN) and user plane function (UPF) to satellites. on the satellite.
- wireless access network radio access network
- UPF user plane function
- tunnels need to be established between satellites, that is, tunnels between UPFs deployed on different satellites.
- UE user equipment
- UE2 access RAN1 and RAN2 respectively
- RAN1 and UPF1 are deployed on one satellite
- RAN2 and UPF2 are deployed on another satellite.
- UPF1 corresponding to UE1 saves the tunnel information of UPF2 corresponding to UE2, and is used to communicate with UPF2 corresponding to UE2.
- UPF2 corresponding to UE2 saves the tunnel information of UPF1 corresponding to UE1 and is used to communicate with UPF1 corresponding to UE1.
- the core network equipment deployed on the ground needs to interact with the satellite multiple times to update the tunnel information saved by the UPF, resulting in a long handover delay.
- RAN1 and UPF1 are deployed on one satellite
- RAN2 and UPF2 are deployed on another satellite.
- the core network equipment deployed on the ground needs to communicate with the UPF2 corresponding to UE2, and the UPF3 tunnel corresponding to UE1
- the information is updated to UPF2 corresponding to UE2.
- the core network equipment deployed on the ground also needs to communicate with UPF3 corresponding to UE1, and update the Nx tunnel information of UPF2 corresponding to UE2 to UPF3 corresponding to UE1. Since the core network equipment deployed on the ground is far away from the satellite, the handover delay will be long.
- This application provides a communication method and device to solve the problem of long handover delay when a UE switches to an accessed RAN.
- the present application provides a communication method.
- the method includes: a first user plane network element receiving first indication information from a session management network element, and the first indication information instructs the first user plane network element to send a message to a third user plane network element.
- Two user plane network elements send first information, and the first information is used for communication between the second user plane network element and the first user plane network element; the first user plane network element sends a message to the second user plane network element.
- the network element sends the first information.
- the session management network element sends the first instruction information to the first user plane network element, thereby realizing that the first information that needs to be sent to the second user plane network element is sent to the second user through the first user plane network element.
- plane network elements reducing the interaction between the primary session management network element and the second user plane network element, thereby shortening the delay in the handover process of the first terminal device.
- the first user plane network element sends a first data packet to the second user plane network element, and the first data packet includes the first information.
- the first user plane network element can send the first information to the second user plane network element without adding additional delay and signaling.
- the first user plane network element constructs the first data packet, so The first data packet includes the first information.
- the first user plane network element before the first user plane network element sends the first data packet to the second user plane network element, the first user plane network element receives the first indication information. Afterwards, the first data packet that needs to be sent to the second user plane network element is received; the first user plane network element is in the first data packet that needs to be sent to the second user plane network element. Add the first information, and use the first data packet that needs to be sent to the second user plane network element after adding the first information as the first data packet.
- the first information can be transmitted in a timely manner, thereby shortening the delay in the switching process of the terminal device.
- the first information includes information about a first tunnel
- the first tunnel is a tunnel through which the second user plane network element communicates with the first user plane network element.
- the information of the first tunnel is included in a first transparent transmission container.
- the method further includes: the first user plane network element receiving the first information from the session management network element.
- the present application provides a communication method, which method includes: a session management network element receiving switching instruction information, the switching instruction information indicating that the first session of the first terminal device is to be switched, and the first session is the first session of the first terminal device.
- a terminal device is used for a session of communication with a second terminal device; sending first instruction information to a first user plane network element, and the first instruction information instructs the first user plane network element to send a message to a second user plane network element.
- First information wherein the first information is used for communication between the second user plane network element and the first user plane network element, and the first user plane network element is the first user plane network element after the first session switching.
- the first terminal device serves, and the second user plane network element serves the second terminal device.
- the session management network element sends the first instruction information to the first user plane network element, thereby realizing that the first information that needs to be sent to the second user plane network element is sent to the second user through the first user plane network element.
- plane network elements reducing the interaction between the primary session management network element and the second user plane network element, thereby shortening the delay in the handover process of the first terminal device.
- the first information includes information about the first tunnel
- the first tunnel is a tunnel through which the second user plane network element communicates with the first user plane network element.
- the information of the first tunnel is included in a first transparent transmission container.
- the method further includes: sending the first information to the first user plane network element.
- the session management network element can allocate the first tunnel and send the first information to the first user plane network element.
- the present application provides a communication method, which method includes: a second user plane network element receiving first information from a first user plane network element, where the first information is used between the second user plane network element and The first user plane network element communicates; the second user plane network element updates routing rules according to the first information, and the routing rules are used by the second user plane network element to send messages to the first user plane network element forwards data, the first user plane network element serves the first terminal device, and the The second user plane network element serves the second terminal device.
- the second user plane network element can obtain the first information from the first user plane network element, and then update the routing rules based on the first information.
- the first information includes information about a first tunnel
- the first tunnel is a tunnel through which the second user plane network element communicates with the first user plane network element.
- the information of the first tunnel is included in a transparent transmission container.
- the present application provides a communication method, which method includes: the session management network element receives second switching instruction information, the second switching instruction information indicates that the second session of the second terminal device is to be switched, wherein, the The second session is a session used by the second terminal device to communicate with the first terminal device; after receiving the second switching instruction information, the first switching instruction information is received, and the first switching instruction information indicates that the first terminal The first session of the device is to be switched, wherein the first session is a session used by the first terminal device to communicate with the second terminal device; sending the second indication information to the first source user plane network element, The second instruction information is used to instruct the first source user plane network element to send second information to the second target user plane network element and send third information to the second source user plane network element, wherein the second The source user plane network element serves the second terminal device before the second session switch, and the second target user plane network element serves the second terminal device after the second session switch.
- the second information is used for communication between the second target user plane network element and the first target user plane network element
- the third information is used for the second source user plane network element and the first target user plane network element.
- Communication the first source user plane network element serves the first terminal device before the first session switching
- the first target user plane network element serves the first terminal device after the first session switching. Terminal equipment services.
- the session management network element sends the second instruction information to the first source user plane network element, thereby realizing the second information that needs to be sent to the second target user plane network element and the third information of the second source user plane network element.
- the information is sent through the first source user plane network element, which reduces the interaction between the session management network element and the second target user plane network element and the second source user plane network element.
- the second information includes information about a second tunnel, and the second tunnel is a tunnel through which the second target user plane network element communicates with the first target user plane network element;
- the third information includes information about a third tunnel, and the third tunnel is a tunnel for communication between the second source user plane network element and the first target user plane network element.
- the information of the second tunnel is included in a second transparent transmission container
- the information of the third tunnel is included in a third transparent transmission container.
- the method further includes: the session management network element sending the second information to the first source user plane network element, and/or sending the second information to the first source user plane network element. Describe the third information.
- this application provides a communication method, which method includes:
- the first source user plane network element receives second indication information from the session management network element.
- the second indication information is used to instruct the first source user plane network element to send second information to the second target user plane network element, to
- the second source user plane network element sends third information, wherein the second source user plane network element and the second target user plane network element serve the second terminal device, and the second information is used for the third
- the second target user plane network element communicates with the first target user plane network element, and the third information is used for the second source user plane network element to communicate with the first target user plane network element.
- the first source user The plane network element and the first target user plane network element serve the first terminal device; the first source user plane network element sends the second information to the second target user plane network element, and sends the second information to the second target user plane network element.
- the second source user plane network element sends the third information.
- the session management network element sends the second instruction information to the first source user plane network element, thereby realizing the second information that needs to be sent to the second target user plane network element and the third information of the second source user plane network element.
- the information is sent through the first source user plane network element, which reduces the interaction between the session management network element and the second target user plane network element and the second source user plane network element.
- the method further includes: the first source user plane network element receives the the second information and/or the third information.
- the second information includes information about a second tunnel, and the second tunnel is a tunnel through which the second target user plane network element communicates with the first target user plane network element;
- the third information includes information about a third tunnel, and the third tunnel is a tunnel for communication between the second source user plane network element and the first target user plane network element.
- the information of the second tunnel is included in a second transparent transmission container
- the information of the third tunnel is included in a third transparent transmission container.
- the first source user plane network element sends a second data packet to the second target user plane network element, where the second data packet includes the second information, and is sent to the second target user plane network element.
- the second source user plane network element sends a third data packet, where the third data packet includes third information.
- the second data packet carries the second information
- the third data packet carries the third information.
- the first source user plane network element can send the second information without adding additional delay and signaling. to the second target user plane network element, and send the third information to the second source target user plane network element.
- the first source user plane network element before the first source user plane network element sends the second data packet to the second target user plane network element, the first source user plane network element constructs the second data packet, the first data packet contains the second information.
- the first source user plane network element before the first source user plane network element sends the second data packet to the second target user plane network element, the first source user plane network element receives the After receiving the second indication information, the first data packet that needs to be sent to the second target user plane network element is received; the first source user plane network element receives the first data packet that needs to be sent to the second target user plane.
- the second information is added to the data packet of the network element, and the first data packet after adding the second information that needs to be sent to the second target user plane network element is used as the second data packet.
- the second information can be transmitted in time, thereby shortening the delay of the switching process of the first terminal device and the delay of the switching process of the first terminal device.
- the third data packet is an end mark data packet.
- the present application provides a communication device.
- the device is a first user plane network element or a device used to implement the functions of the first user plane network element.
- the device includes: a transceiver unit and a processing unit;
- the processing unit calls the transceiver unit to perform: receive first instruction information from the session management network element, the first instruction information instructs the first user plane network element to send the first information to the second user plane network element, and the first user plane network element sends the first information to the second user plane network element.
- a piece of information is used for communication between the second user plane network element and the first user plane network element; sending the first information to the second user plane network element.
- the transceiver unit is configured to send a first data packet to the second user plane network element when sending the first information to the second user plane network element.
- the first data packet includes the first information.
- the processing unit is configured to construct the first data packet before sending the first data packet to the second user plane network element, and the first data packet includes the first data packet. a message.
- the transceiver unit is configured to, before sending the first data packet to the second user plane network element, receive the first data packet that needs to be sent to the network element after receiving the first indication information.
- the data packet of the second user plane network element; the processing unit is configured to add the first information to the first data packet that needs to be sent to the second user plane network element, and add the first information to the data packet of the second user plane network element.
- the first data packet that needs to be sent to the second user plane network element after the first information is used as the first data packet.
- the first information includes information about a first tunnel
- the first tunnel is a tunnel through which the second user plane network element communicates with the first user plane network element.
- the information of the first tunnel is included in a first transparent transmission container.
- the transceiver unit is configured to receive the first information from a session management network element.
- the present application provides a communication device.
- the device is a session management network element or a device used to implement the function of a session management network element.
- the device includes: a transceiver unit and a processing unit; the processing unit calls the The transceiver unit performs: receiving switching indication information, the switching indication information indicating that a first session of the first terminal device is to be switched, and the first session is a session used by the first terminal device to communicate with the second terminal device;
- the first user plane network element sends first indication information, and the first indication information instructs the first user plane network element to send first information to the second user plane network element, wherein the first information is used for the
- a second user plane network element communicates with the first user plane network element.
- the first user plane network element serves the first terminal device after the first session switching.
- the second user plane network element Serve the second terminal device.
- the first information includes information about the first tunnel
- the first tunnel is a tunnel through which the second user plane network element communicates with the first user plane network element.
- the information of the first tunnel is included in a first transparent transmission container.
- the transceiver unit is configured to send the first information to the first user plane network element.
- the present application provides a communication device.
- the device is a second user plane network element or a device used to implement the functions of the second user plane network element.
- the device includes: a transceiver unit and a processing unit;
- the transceiver unit is configured to receive first information from the first user plane network element, and the first information is used for communication between the second user plane network element and the first user plane network element;
- the processing unit is configured to Update routing rules according to the first information.
- the routing rules are used by the second user plane network element to forward data to the first user plane network element.
- the first user plane network element is the first terminal.
- Device service, the second user plane network element serves the second terminal device.
- the first information includes information about a first tunnel
- the first tunnel is a tunnel through which the second user plane network element communicates with the first user plane network element.
- the information of the first tunnel is included in a transparent transmission container.
- the present application provides a communication device, which is a session management network element or a device used to implement the function of a session management network element.
- the device includes: a transceiver unit and a processing unit; the processing unit calls the The transceiver unit performs: receiving second switching instruction information, the second switching instruction information indicating that the second session of the second terminal device is to be switched, wherein the second session is used by the second terminal device to communicate with the first A session for terminal device communication; after receiving the second switching indication information, receive the first switching indication information, the first switching indication information indicates that the first session of the first terminal device is to be switched, wherein the first session In order to be a session used by the first terminal device to communicate with the second terminal device; sending second indication information to the first source user plane network element, the second indication information is used to instruct the first source user
- the plane network element sends the second information to the second target user plane network element and sends the third information to the second source user plane network element, wherein the second source user plane network element is the so-called second
- the second terminal device services, the second target user plane network element serves the second terminal device after the second session switching, and the second information is used for the second target user plane network element to communicate with the second terminal device.
- the first target user plane network element communicates, and the third information is used for communication between the second source user plane network element and the first target user plane network element.
- the first source user plane network element communicates with the first target user plane network element in the first target user plane network element.
- the first terminal device is served before a session is switched, and the first target user plane network element is served by the first terminal device after the first session is switched.
- the second information includes information about a second tunnel, and the second tunnel is a tunnel through which the second target user plane network element communicates with the first target user plane network element;
- the third information includes information about a third tunnel, and the third tunnel is a tunnel for communication between the second source user plane network element and the first target user plane network element.
- the information of the second tunnel is included in a second transparent transmission container, and the information of the third tunnel The information is contained in the third transparent container.
- the transceiver unit is configured to send the second information to the first source user plane network element; and/or the transceiver unit is configured to send the second information to the first source user plane network element.
- the network element sends the third information.
- the present application provides a communication device.
- the device is a first source user plane network element or a device used to realize the functions of the first source user plane network element.
- the device includes: a transceiver unit and a processing unit;
- the processing unit calls the transceiver unit to perform: receiving second instruction information from the session management network element, where the second instruction information is used to instruct the first source user plane network element to send the second instruction to the second target user plane network element.
- the second information is to send the third information to the second source user plane network element, wherein the second source user plane network element and the second target user plane network element serve the second terminal device, and the second information is When the second target user plane network element communicates with the first target user plane network element, the third information is used for communication between the second source user plane network element and the first target user plane network element, and the The first source user plane network element and the first target user plane network element serve the first terminal device; send the second information to the second target user plane network element, and send the second information to the second source user The network element sends the third information.
- the transceiver unit is configured to receive the second information and/or the third information from the session management network element.
- the second information includes information about a second tunnel, and the second tunnel is a tunnel through which the second target user plane network element communicates with the first target user plane network element;
- the third information includes information about a third tunnel, and the third tunnel is a tunnel for communication between the second source user plane network element and the first target user plane network element.
- the information of the second tunnel is included in a second transparent transmission container
- the information of the third tunnel is included in a third transparent transmission container.
- the transceiver unit is configured to send the second information to the second target user plane network element and the third information to the second source user plane network element.
- the plane network element sends a second data packet, where the second data packet includes the second information, and sends a third data packet to the second source user plane network element, where the third data packet includes the third information.
- the processing unit is configured to construct the second data packet before sending the second data packet to the second target user plane network element, and the first data packet includes the Second information.
- the transceiver unit is configured to receive the first data packet that needs to be sent after receiving the second indication information before sending the second data packet to the second target user plane network element.
- a data packet to the second target user plane network element the processing unit is configured to add the second information to the first data packet that needs to be sent to the second target user plane network element, The first data packet that needs to be sent to the second target user plane network element after adding the second information is used as the second data packet.
- the third data packet is an end mark data packet.
- the present application also provides a device.
- the device can perform the above method design.
- the device may be a chip or circuit capable of performing the functions corresponding to the above methods, or a device including the chip or circuit.
- the device includes: a memory for storing computer executable program code; and a processor, the processor is coupled to the memory.
- the program code stored in the memory includes instructions, and when the processor executes the instructions, the device or the device installed with the device executes the method in any of the above possible designs.
- the device may further include a communication interface, which may be a transceiver, or, if the device is a chip or a circuit, the communication interface may be an input/output interface of the chip, such as an input/output pin, etc.
- a communication interface which may be a transceiver, or, if the device is a chip or a circuit, the communication interface may be an input/output interface of the chip, such as an input/output pin, etc.
- the device includes corresponding functional units, respectively used to implement the steps in the above method.
- Functions can be implemented by hardware, or by hardware executing corresponding software.
- Hardware or software includes one or more units corresponding to the above functions.
- the present application provides a computer-readable storage medium.
- the computer-readable storage medium stores a computer program.
- the method in any of the above possible designs is executed. .
- the present application provides a computer program product.
- the computer program product includes a computer program.
- the computer program When the computer program is run on a device, the method in any of the above possible designs is executed.
- Figure 1 is a schematic diagram of the architecture of the mobile communication system applied in this application.
- Figure 2 is a schematic diagram of communication between UE1 and UE2 through two satellites in this application;
- Figure 3 is a schematic diagram of the source S-gNB1 serving UE1 switching and/or the source S-gNB2 serving UE1 switching in this application;
- Figure 4 is an overview flow chart of a communication method in this application.
- FIG. 5 is an overview flow chart of another communication method in this application.
- Figure 6 is a specific flow chart of updating tunnel information in this application in the scenario where there is no handover conflict between UE1 and UE2;
- Figure 7 is one of the specific flowcharts in this application for updating tunnel information in the scenario where UE1 and UE2 have handover conflicts;
- Figure 8 is the second specific flow chart of updating tunnel information in the scenario where UE1 and UE2 have handover conflicts in this application;
- Figure 9 is one of the structural schematic diagrams of a communication device in this application.
- Figure 10 is the second structural schematic diagram of a communication device in this application.
- A/B can mean A or B; "and/or” in this application is just an association relationship describing related objects. , indicating that three relationships can exist, for example, A and/or B can represent: A alone exists, A and B exist at the same time, and B alone exists.
- at least one item refers to one or more items, and “multiple items” refers to two or more items.
- At least one of the following" or similar expressions thereof refers to any combination of these items, including any combination of a single item (items) or a plurality of items (items).
- at least one of a, b, or c can mean: a, b, c, ab, ac, bc, or abc, where a, b, c can be single or multiple .
- the 5G communication system formulated by the 3rd generation partnership project (3GPP) standard.
- the communication system includes terminal equipment (for example, user equipment (UE)), RAN, and core network (Core network, CN).
- UE user equipment
- RAN access control
- Core network Core network
- CN core network
- the network elements of the core network can be divided into two parts: the user plane and the control plane.
- the control plane is responsible for the management of the mobile network
- the user plane is responsible for the transmission of business data.
- the terminal device is the entrance for mobile users to interact with the network. It can provide basic computing capabilities and storage capabilities, display business windows to users, and receive user operation inputs.
- Next-generation terminal equipment NextGen UE
- NextGen UE can use new air interface technology to establish signal connections and data connections with the RAN, thereby transmitting control signals and business data to the mobile network.
- Terminal devices can include various handheld devices with wireless communication functions, vehicle-mounted devices, wearable devices, computing devices or other processing devices connected to wireless modems, as well as various forms of terminals, mobile stations (MS), terminals (terminal), soft terminal, etc., such as water meters, electricity meters, sensors, etc.
- RAN Deployed close to terminal equipment, it provides network access functions for authorized users in specific areas, and can determine transmission tunnels of different qualities to transmit user data based on user levels, business needs, etc.
- RAN can manage its own resources, utilize them rationally, provide access services to terminal devices on demand, and is responsible for forwarding control signals and user data between terminal devices and the core network.
- Core network responsible for maintaining the contract data of the mobile network, managing the network elements of the mobile network, and providing session management, mobility management, policy management, security authentication and other functions for terminal devices.
- network access authentication is provided for the terminal device; when the terminal device has a service request, network resources are allocated to the terminal device; when the terminal device moves, network resources are updated for the terminal device; when the terminal device is idle, Provide a quick recovery mechanism for the terminal device; release network resources for the terminal device when the terminal device is detached; when the terminal device has business data, provide data routing functions for the terminal device, such as forwarding uplink data to the data network; or from data
- the network receives downlink data from the terminal device and forwards it to the RAN, which then sends it to the terminal device.
- Data network A data network that provides business services to users.
- the client is located in the terminal device and the server is located in the data network.
- the data network can be a private network, such as a local area network, or an external network that is not controlled by the operator, such as the Internet. It can also be a proprietary network deployed by operators, such as an IP multimedia network subsystem. core network subsystem, IMS) service network.
- IMS IP multimedia network subsystem
- the core network user plane includes UPF; the core network control plane includes access and mobility management function (AMF), session management function (SMF), network exposure function (network exposure function, NEF), network function repository function (NF repository function, NRF), unified data management (UDM), network slice selection function (NSSF), authentication server function (AUSF), Policy control function (PCF), application function (AF).
- UPF access and mobility management function
- SMF session management function
- NEF network exposure function
- NEF network exposure function repository function
- NRF network function repository function
- UDM unified data management
- NSSF network slice selection function
- AUSF authentication server function
- PCF Policy control function
- AF application function
- the core network control plane adopts a service-oriented architecture, and the interaction between control plane network elements adopts service invocation to replace the point-to-point communication method in the traditional architecture.
- control plane network elements will open services to other control plane network elements for calls by other control plane network elements; in point-to-point communication, the communication interfaces between control plane network elements will store a specific set of messages, only It can be used by the control plane network elements at both ends of the interface during communication.
- Session management network element Mainly used for session management, IP address allocation and management of terminal equipment, selecting endpoints that can manage user equipment plane functions, policy control, or charging function interfaces, and downlink data notifications.
- the session management network element can be an SMF network element.
- future communications such as 6G communications, the session management network element can still be SMF network elements may have other names, which are not limited in this application.
- Nsmf is a service-based interface provided by SMF. SMF can communicate with other network functions through Nsmf.
- Access management network element It is mainly used for mobility management and access management.
- it can be the mobility management entity (MME) function in the 4G communication network or the AMF network element in the 5G network.
- MME mobility management entity
- the access management network element can still be an AMF network element, or have other names, which is not limited in this application.
- Namf is a service-based interface provided by AMF. AMF can communicate with other network functions through Namf.
- Network opening network element used to securely open services and capabilities provided by 3GPP network functions to the outside world.
- network open function network elements can be NEF network elements.
- future communications such as 6G communications
- network open function network elements can still be NEF network elements, or have other names. This application does not limit this.
- Nnef is a service-based interface provided by NEF. NEF can communicate with other network functions through Nnef.
- Network storage network element used to provide service registration, discovery and authorization, and maintain available network function (NF) instance information, which can realize on-demand configuration of network functions and services and interconnection between NFs.
- network storage network elements can be NRF network elements.
- network storage function network elements can still be NRF network elements, or have other names. This application does not limit this.
- Nnrf is a service-based interface provided by NRF. NRF can communicate with other network functions through Nnrf.
- Policy control network element A unified policy framework used to guide network behavior, providing policy rule information for control plane functional network elements (such as AMF, SMF, etc.).
- the policy control network element can be a PCF network element.
- future communications such as 6G communications, the policy control network element can still be a PCF network element, or have other names. This application does not limit this.
- Npcf is a service-based interface provided by PCF. PCF can communicate with other network functions through Npcf.
- Data management network element used to process user identification, subscription, access authentication, registration, or mobility management, etc.
- the data management network element can be a UDM network element.
- future communications such as 6G communication, the data management network element can still be a UDM network element, or have other names. This application does not limit this.
- Nudm is a service-based interface provided by UDM. UDM can communicate with other network functions through Nudm.
- Data storage network element used to perform the access function of contract data, policy data, application data and other types of data.
- the data storage network element can be a UDR network element.
- future communications such as 6G communications, the data storage network element can still be a UDR network element, or have other names. This application does not limit this.
- Nudr is a service-based interface provided by UDR. UDR can communicate with other network functions through Nudr.
- Application network element used for data routing affected by applications, access to network open functions, or interaction with the policy framework for policy control, etc.
- the application network element can be an AF network element.
- future communications such as 6G communication, the application network element can still be an AF network element, or have other names. This application does not limit this.
- Naf is a service-based interface provided by AF. AF can communicate with other network functions through Naf.
- User plane network element used for packet routing and forwarding, or quality of service (QoS) processing of user plane data.
- QoS quality of service
- user plane network elements can be user plane function (UPF) network elements.
- UPF user plane function
- user plane network elements can still be UPF network elements, or have other names. This application There is no limit to this.
- Authentication service network element mainly used for user authentication, etc.
- the authentication service network element can be an AUSF network element.
- future communications such as 6G communication, the authentication service network element can still be an AUSF network element, or have other names. This application does not limit this.
- Nausf is a service-based interface provided by AUSF. AUSF can interact with it through Nausf His network function communication.
- Network slicing selection function network element used to select network slicing for terminal equipment.
- the network slicing selection function network element can be an NSSF network element.
- future communications such as 6G communication, the network slicing selection function network element will still be It may be an NSSF network element or have other names, which is not limited in this application.
- the core network may also include other network elements, which is not limited in this application.
- FIG. 2 shows a schematic diagram of UE1 and UE2 communicating through two satellites.
- S-gNB1 provides services for UE1
- S-gNB1 and S-UPF1 are deployed on a satellite
- S-gNB2 provides services for UE2
- S-gNB2 and S-UPF2 are deployed on a satellite.
- a tunnel needs to be established.
- the tunnel may be an Nx tunnel
- the core network equipment on the ground such as session management function (SMF)
- SMF session management function
- S-UPF1 is configured with the Nx tunnel information of S-UPF2 (for example, SMF provides forwarding action rule (FAR) to S-UPF1).
- S-UPF1 can forward S-UPF1 to S-UPF1 based on the Nx tunnel information of S-UPF2.
- UPF2 sends the data sent by UE1 to UE2.
- S-UPF2 can send the data sent by UE2 to UE1 to S-UPF1 based on the Nx tunnel information of S-UPF1.
- the Nx tunnel information configured by the corresponding peer needs to be updated.
- the specific process of updating the Nx tunnel information will be described below by taking the handover of the source S-gNB1 serving UE1 and/or the handover of the source S-gNB2 serving UE2 as examples.
- the SMF receives the switching indication information from the AMF. Among them, target S-gNB1 and target S-UPF1 are deployed on satellite 3. After receiving the handover indication information, the SMF determines that the UPF serving UE1 needs to be changed from source S-UPF1 to target S-UPF1.
- Network elements deployed on the satellite need to interact multiple times with network elements deployed on the ground (such as SMF) to realize the Nx tunnel of the target S-UPF1 corresponding to UE1
- the information is updated to the source S-UPF2
- the Nx tunnel information of the source S-UPF2 corresponding to UE2 is updated to the target S-UPF1, thereby ensuring normal communication between UE1 and UE2.
- scenario 1 can be described as a scenario where there is no handover conflict between UE1 and UE2, that is, UE1 or UE2 switches to the gNB to which it is connected.
- SMF When UE1 hands over from source S-gNB1 to target S-gNB1 and UE2 hands over from source S-gNB2 to target S-gNB2, SMF receives handover instruction information related to UE1, and SMF also receives handover instruction information related to UE2.
- target S-gNB1 and target S-UPF1 are deployed on satellite 3.
- Target S-gNB2 and target S-UPF2 are deployed on satellite 4. It can be understood that the SMF may first receive the handover instruction information related to UE1, and then receive the handover instruction information related to UE2, or the SMF may first receive the handover instruction information related to UE2, and then receive the handover instruction information related to UE1.
- network elements deployed on the satellite such as source S-UPF1, target S-UPF1, source S-UPF2, and target S-UPF2
- network elements deployed on the ground such as SMF
- SMF network elements deployed on the ground
- scenario 2 can be described as a scenario in which there is a handover conflict between UE1 and UE2, that is, both UE1 and UE2 switch to the gNB to which they are connected.
- this application provides a communication method to reduce the round-trip interaction between network elements deployed on the ground and network elements deployed on the satellite, and to shorten the delay of the UE handover process.
- the following description only takes the first terminal device to switch access network equipment and the second terminal equipment not to switch access network equipment as an example, corresponding to the above scenario 1.
- the method includes:
- Step 400 The session management network element receives switching indication information, which indicates that the first session of the first terminal device is to be switched.
- the first session is a session established for the first terminal device for communicating with the second terminal device.
- the session management network element receives handover indication information from the access management network element.
- Step 410 The session management network element sends the first instruction information to the first user plane network element.
- the first instruction information instructs the first user plane network element to send the first information to the second user plane network element, where the first information is used to
- the second user plane network element communicates with the first user plane network element.
- the first user plane network element serves the first terminal device after the first session handover, and the second user plane network element serves the second terminal device.
- the first indication information may also instruct the first user plane network element to send a first data packet to the second user plane network element, where the first data packet contains the first information.
- the first user plane network element may construct the first data packet according to the first indication information, and send the first data packet to the second user plane network element.
- the first information is added to the first received data packet sent to the second user plane network element according to the first instruction information, and the data packet with the first information added becomes the first data packet and is sent to the second user plane network element.
- the user plane network element sends the first data packet.
- the first user plane network element may obtain the first data packet through other methods according to the first indication information (for example, the session management network element provides the first data packet to the first user plane network element), and provide the first data packet to the second user plane network element. element sends the first packet.
- the session management network element provides the first data packet to the first user plane network element
- the first indication information may also instruct the first user plane network element to construct a first data packet, and the first data packet includes the first information. Furthermore, the first user plane network element may construct a first data packet according to the first indication information, and the first data packet includes the first information.
- the first indication information may also instruct the first user plane network element to send the first user plane network element to the second user plane network element after receiving the first indication information.
- the first information is added to the data packet.
- the first user plane network element adds the first information to the data packet.
- the data packet to which the first information is added becomes the first data packet.
- Step 420 The first user plane network element sends the first information to the second user plane network element.
- the first user plane network element can obtain the first information in the following two ways:
- the session management network element allocates the first tunnel to the first user plane network element, and sends a session update request message to the first user plane network element.
- the session update request message contains first information.
- sending the session update request message in step 410 can be understood as the session update request message containing both the first indication information and the first information.
- the first tunnel is a tunnel through which the second user plane network element communicates with the first user plane network element. That is, the second user plane network element can communicate with the first user plane network element through the first tunnel of the first user plane network element.
- the first user plane network element sends data.
- the first information includes information about the first tunnel, or the first information is information about the first tunnel.
- the information of the first tunnel may include a tunnel endpoint identifier (TEID).
- the information of the first tunnel may be included in the transparent transmission container.
- the first information includes a transparent transmission container, which is an N4 container.
- the N4 container is sent by the session management network element to the second user plane network element, and the first user plane network element is only responsible for transparent transmission.
- the N4 container contains an N4 session update request message, and the N4 session update request message contains one or more rules.
- the N4 session update request message may contain a forwarding action rule (FAR).
- the FAR contains attributes such as session identifier, rule identifier, action, network instance, destination interface, and outlet header creation.
- the attributes include information about the first tunnel (such as TEID).
- TEID Packet Forwarding Control Protocol
- PFCP Packet Forwarding Control Protocol
- the application only uses the N4 interface as an example.
- the above-mentioned N4 container can be understood as a PFCP container
- N4 session can be understood as a PFCP session.
- the session management network element after receiving the handover indication information, sends a session update request message to the first user plane network element, and the session update request message requests the first user plane network element to allocate the first tunnel. .
- the first user plane network element allocates the first tunnel according to the request message, and determines the first information according to the information of the first tunnel.
- the first information includes the information of the first tunnel, or the first information is the information of the first tunnel.
- the first user plane network element also sends a response message to the session management network element, where the response message includes the information of the first tunnel.
- the session management network element determines the first information based on the information of the first tunnel, and sends the first information to the first user plane network element.
- the first information is the same as the first possible implementation. Way.
- the first user plane network element sends the first information to the second user plane network element, including: the first user plane network element sends a first data packet to the second user plane network element, and the first data packet includes the first information. See step 410 for how to obtain the first data packet.
- the session management network element does not send the first indication information to the first user plane network element, that is, the session management network element does not provide the first indication information in step 410, and the session management network element only sends the first indication information to the first user plane network element.
- the user plane network element provides the first information, and then the first user plane network element sends the first information to the second user plane network element after receiving the first information.
- Step 430 The second user plane network element receives the first information from the first user plane network element, and updates the routing rules according to the first information.
- the routing rules are used by the second user plane network element to forward data to the first user plane network element.
- the first information includes a transparent transmission container containing information about the first tunnel.
- the second user plane network element updates the corresponding routing rule according to the session update request message in the transparent transmission container containing the information of the first tunnel.
- the first information includes information about the first tunnel.
- the second user plane network element updates the corresponding routing rule according to the information of the first tunnel.
- the second user plane network element has the ability to update the corresponding routing rules based on the information of the first tunnel, or the second user plane network element receives configuration information from the session management network element, and the configuration information is used for the second user plane network element Update the corresponding routing rule according to the information of the first tunnel.
- the session management network element sends the first information that needs to be sent to the second user plane network element through the first user plane network element to the second user plane network element, reducing the number of connections between the session management network element and the second user plane. Interaction of network elements.
- this application also provides another communication method to reduce the interaction between network elements deployed on the ground and network elements deployed on the satellite, and to shorten the delay of the UE handover process.
- the following description only takes the access network device to which the first terminal device switches access and the access network device to which the second terminal device switches access before the first terminal device is used as an example. This corresponds to the above scenario 2. .
- the method includes:
- Step 500 The session management network element receives the second handover instruction information, and the second handover instruction information instructs the second terminal device to The second session of the device is to be switched, wherein the second session is a session of the second terminal device for communicating with the first terminal device.
- the session management network element receives the second handover indication information from the access management network element.
- Step 510 After receiving the second switching instruction information, the session management network element receives the first switching instruction information.
- the first switching instruction information indicates that the first session of the first terminal device is to be switched, where the first session is the first terminal. A session of the device used to communicate with the second end device.
- the session management network element receives the first handover indication information from the access management network element.
- Step 520 The session management network element sends the second instruction information to the first source user plane network element.
- the second instruction information is used to instruct the first source user plane network element to send the second information to the second target user plane network element.
- the second source user plane network element sends the third information, wherein the second source user plane network element serves the second terminal device before the second session switching, and the second target user plane network element serves the second terminal after the second session switching.
- the second information is used for communication between the second target user plane network element and the first target user plane network element
- the third information is used for communication between the second source user plane network element and the first target user plane network element
- the first source The user plane network element serves the first terminal device before the first session handover
- the first target user plane network element serves the first terminal device after the first session handover.
- the session management network element allocates a second tunnel.
- the second tunnel is a tunnel for communication between the second target user plane network element and the first target user plane network element, to the first source.
- the user plane network element sends the second information.
- the second information includes information about the second tunnel.
- the session management network element After receiving the first handover instruction information, the session management network element also allocates a third tunnel and obtains the third information based on the information of the third tunnel.
- the third tunnel is the second source user plane network element and the first target user plane network element.
- the communication tunnel sends the third information to the first source user plane network element.
- the third information includes information of the third tunnel.
- the session management network element after receiving the first handover indication information, requests the first target user plane network element to allocate the second tunnel and/or the third tunnel. Similar to the second possible implementation manner in step 420, the session management network element or the first target user plane network element determines the second information and/or the third information. If the session management network element determines the second information and/or the third information, it sends the second information and/or the third information to the first source user plane network element.
- the content contained in the second information and/or the third information is similar to that described in step 420, that is, it directly contains the information of the second tunnel and/or the information of the third tunnel, or contains the second transparent transmission container and/or Or the third transparent transmission container.
- the second tunnel and the third tunnel may be the same tunnel, that is, the session management network element or the first target user plane network element is allocated only once.
- the second tunnel is the third tunnel
- the information about the second tunnel is the information about the third tunnel. If the second information only contains information about the second tunnel, and the third information only contains information about the third tunnel, then the second information is the third information, contains the information about the second tunnel, or is the information about the second tunnel.
- the second indication information may also instruct the first source user plane network element to send a second data packet to the second target user plane network element, and to send a third data packet to the second source user plane network element.
- the second data packet contains the second information
- the third data packet contains the third information.
- the second indication information may also instruct the first source user plane network element to construct the second data packet and the third data packet.
- the second instruction information may also instruct the first source user plane network element to send the first received instruction to the second target user plane network element after receiving the second instruction information.
- the second information is added to the data packet of the second source user plane network element, and the third information is added to the first received data packet sent to the second source user plane network element.
- the first data packet sent to the second target user plane network element after the second information is added becomes the second data packet, and the first data packet sent to the second source user plane network element after the third information is added Become the third packet.
- the second indication information may also indicate that the first source user plane network element receives the After the second indication information is provided, the second information is added to the end mark data packet sent to the second target user plane network element, and the third information is added to the end mark data packet sent to the second source user plane network element.
- the end-marked data packet sent to the second target user plane network element after adding the second information becomes the second data packet
- the end-marked data packet sent to the second source user plane network element after adding the third information becomes the third data packet.
- Step 530 The first source user plane network element sends the second information to the second target user plane network element.
- the first source user plane network element sends a second data packet to the second target user plane network element, and the second data packet includes second information.
- the second data packet is composed of the first data packet sent by the first source user plane network element to the second target user plane network element after receiving the second indication information.
- the data packet, or the second data packet is a data packet constructed by the first source user plane network element.
- Step 540 The first source user plane network element sends the third information to the second source user plane network element.
- the first source user plane network element sends a third data packet to the second source user plane network element, where the third data packet includes third information.
- the third data packet is the above-mentioned end marker data packet (Endmarker data packet).
- the end-mark data packet may also include second information.
- the second source user plane network element sends the received end-mark data packet.
- the second source access network device then sends it to the second target access network device, and the second target access network device sends it to the second target user plane network element.
- step 530 does not need to be performed.
- the second source access network device is the access network device that serves the second terminal device before the handover
- the second target access network device is the access network device that serves the second terminal device after the handover.
- the first source user plane network element regardless of whether the session management network element sends the second indication information to the first source user plane network element, the first source user plane network element receives the second information and the second indication information from the session management network element. When three pieces of information are sent, the first source user plane network element sends the second information to the second target user plane network element, and sends the third information to the second source user plane network element.
- step 530 and step 540 is not limited here.
- Step 550 The second target user plane network element receives the second information from the first source user plane network element, and updates the corresponding routing rule according to the second information.
- the second target user plane network element receives the second information from the first source user plane network element, and updates the corresponding routing rule according to the second information.
- Step 560 The second source user plane network element receives the third information from the first source user plane network element, and updates the corresponding routing rule according to the third information.
- the second source user plane network element receives the third information from the first source user plane network element, and updates the corresponding routing rule according to the third information.
- step 550 and step 560 is not limited here.
- the session management network element sends the second information that needs to be sent to the second target user plane network element and the third information of the second source user plane network element through the first source user plane network element, thereby reducing the need for session management Interaction between the network element and the second target user plane network element and the second source user plane network element.
- source RAN1 and source UPF1 are located on the same satellite (denoted as satellite 1), target RAN1 and target UPF1 are located on the same satellite (denoted as satellite 2), and RAN2 and UPF2 are located on the same satellite (denoted as satellite 3).
- satellite 1 to satellite 3 are different from each other.
- this embodiment is applied to the scenario where there is no handover conflict between UE1 and UE2, corresponding to scenario 1 above.
- this scenario can be understood as: the SMF receives the handover instruction sent by the UE1 side, but does not receive the handover instruction sent by the UE2 side. Or, the SMF receives the switching instruction sent by the UE2 side but does not receive the switching instruction sent by the UE1 side.
- the following is an example of how to update the tunnel information of UPF2 serving UE2, taking the SMF receiving the handover instruction sent by the UE1 side but not receiving the handover instruction sent by the UE2 side as an example, as shown in Figure 6.
- Step 1 Source RAN1 sends a handover request message to target RAN1.
- Step 2 The target RAN1 sends a handover request confirmation message to the source RAN1.
- Step 3 The source RAN1 sends an RRC Reconfiguration message to UE1 to trigger Uu handover.
- the RRC Reconfiguration message contains the information needed to access the target RAN.
- Step 4 The source RAN1 sends a status transfer (Status transfer) message to the target RAN1.
- the status transfer message is used to synchronize the sequence number of the data packet, etc.
- Step 5 UE1 sends an RRC Reconfiguration complete message to the target RAN1, thus completing the RRC handover process.
- Steps 1 to 5 are the process of handover of UE1 from source RAN1 to target RAN1.
- the handover process here can also be called RRC handover.
- the above process only switches the RAN-related paths, but the UPF-related paths are not switched (that is, the source UPF1 is still used for data transmission).
- the path for UE1 to send data to UE2 is UE1->source RAN1->source
- UPF1->UPF2->RAN2->UE2 the path for UE2 to send data to UE1 is UE2->RAN2->UPF2->source UPF1->source RAN1->UE1.
- the path for UE1 to send data to UE2 is UE1->target RAN1->source UPF1->UPF2->RAN2->UE2, and the path for UE2 to send data to UE1 is UE2->RAN2->UPF2->source.
- Step 6 The target RAN1 sends a path switch (N2Path Switch) request message to the AMF.
- the path switch request message contains the information of the first session.
- the first session is a session to be switched by UE1, and the first session is a session of UE1 used to communicate with UE2.
- Step 7 AMF sends a session management context update (SM Context Update for UE1) request message to SMF.
- the session management context update request message contains switching indication information, and the switching indication information indicates that the first session is to be switched.
- the target RAN1 also sends the AN N3 tunnel information allocated by the target RAN1 to the AMF.
- AN N3 tunnel is used by target UPF1 to send data to target RAN1.
- the AMF also sends access network (AN) N3 tunnel information to the SMF.
- Step 8 SMF sends an N4 session establishment (N4establishment) request message to the target UPF1.
- N4establishment N4establishment
- the SMF determines that the UPF serving the first session needs to be switched, selects the target UPF1 to serve the first session, and sends an N4 session establishment request message to the target UPF1.
- the SMF learns that the RAN is switched based on the switching indication information, and then further determines whether the UPF needs to be switched. For example, the SMF can determine whether UPF needs to be switched based on the deployment status of UPF and RAN, ephemeris, etc., and when determining to switch UPF, select the target UPF1 based on the above information.
- the SMF allocates a tunnel to the target UPF1, and the tunnel refers to the tunnel through which the target UPF1 serving UE1 communicates with the UPF2 serving UE2.
- the N4 session establishment request message includes tunnel information of UPF2 and tunnel information of target UPF1.
- the tunnel information of UPF2 is used by the target UPF1 to send the data sent by UE1 to UE2 to UPF2
- the tunnel information of the target UPF1 is used by UPF2 to send the data sent by UE1 to UE2 to the target UPF1.
- the N4 session establishment request message includes tunnel information of UPF2 and an N4 container containing tunnel information of target UPF1.
- the N4 session establishment request message requests the target UPF1 to allocate a tunnel.
- the N4 session establishment request message also includes tunnel information of UPF2.
- the SMF may also send first indication information to the target UPF1, and the first indication information instructs the target UPF1 to send the first information to UPF2.
- the first indication information may also indicate other content.
- the relevant description in step 410 please refer to the relevant description in step 410.
- Step 9 Target UPF1 sends an N4 session establishment response message to SMF.
- the target UPF1 allocates a tunnel according to the N4 session establishment request message, and the N4 session establishment response message includes the tunnel information of the target UPF1.
- SMF can also send an N4 container containing the tunnel information of target UPF1 to target UPF1 through other methods.
- the N4 container containing the tunnel information of target UPF1 is transparently transmitted from target UPF1 to UPF2, including
- the N4 container of the tunnel information of the target UPF1 includes the N4 session update request message sent by the SMF to UPF2, and the N4 session update request message includes the tunnel information of the target UPF1.
- the SMF contains an N4 container containing the tunnel information of the target UPF1.
- the AMF transparently transmits it to the target RAN1.
- the target RAN1 After receiving the N4 container containing the tunnel information of the target UPF1, the target RAN1 Send to destination UPF1.
- step 8 when SMF sends the message to the target UPF1, it can also carry AN N3 tunnel information. In addition, SMF also allocates a CN N3 tunnel, which is used by the target RAN1 to send data to the target UPF1.
- Step 10 The SMF sends a session management context update response message to the AMF.
- the session management context update response message is used to confirm the session management context update request message.
- SMF also interacts with the source UPF1 to release the context of UE1.
- Step 11 The AMF sends a path switching response message to the target RAN1, and the path switching response message confirms that the path switching has been completed.
- the path for UE1 to send data to UE2 is UE1->target RAN1->target UPF1->UPF2->RAN2->UE2, and the path for UE2 to send data to UE1 remains unchanged.
- SMF also sends CN N3 tunnel information to target RAN1.
- Step 12 The target UPF1 sends the first information to UPF2.
- the target UPF1 sends a data packet to UPF2, and the data packet contains the first information.
- target UPF1 sends data packets to UPF2 based on the tunnel information of UPF2.
- the data packet contains the tunnel information of the target UPF1.
- the packet contains the N4 container containing the tunnel information of the target UPF1.
- target UPF1 may use, but is not limited to, the following methods 1 and 2 to send data packets to UPF2.
- Target UPF1 directly constructs a data packet, and target UPF1 sends the constructed data packet to UPF2.
- the constructed data packet includes the tunnel information of the target UPF1 or the N4 container containing the tunnel information of the target UPF1.
- Method 2 After the target UPF1 receives the first indication information, the target UPF1 adds the tunnel information of the target UPF1 or the N4 container containing the tunnel information of the target UPF1 in the first data packet sent to UPF2. Target UPF1 sends this packet to UPF2.
- the target UPF1 can be determined to adopt the above method 1 or method 2 through local configuration or through indication information sent by SMF.
- Step 13 After receiving the first information from target UPF1, UPF2 updates the routing rules according to the first information. The routing rules are used by UPF2 to forward data to target UPF1.
- UPF2 receives the N4 container containing the tunnel information of the target UPF1, and directly updates the routing rules based on the N4 container containing the tunnel information of the target UPF1.
- UPF2 receives the tunnel information of the target UPF1, and UPF2 updates the routing rules based on the tunnel information of the target UPF1.
- UPF2 has the ability to update routing rules based on tunnel information.
- UPF2 updates routing rules based on the tunnel information and configuration information of target UPF1.
- the configuration information is used by UPF2 to update routing rules based on the tunnel information of target UPF1.
- the configuration information can be sent to UPF2 by SMF, and the specific timing of sending the configuration information is not limited here.
- the path for UE2 to send data to UE1 is:
- UPF2 can also send an end marker packet to the source UPF1.
- the source UPF1 sends the end mark data packet to the source RAN1, and the source RAN1 sends the end mark data packet to the target RAN1.
- the path through which UE2 sends data to UE1 is the path through which UE2 sends data to UE1 after UPF2 updates the routing rules.
- the above embodiment can be used to reduce the round trip of an interaction between SMF and UPF2, thereby shortening the delay of the handover process of UE1.
- the source RAN1 and the source UPF1 are located on the same satellite (denoted as satellite 1)
- the target RAN1 and the target UPF1 are located on the same satellite (denoted as satellite 2)
- the source RAN2 and source UPF2 are located on the same satellite (denoted as satellite 2).
- satellite 3 target RAN2 and target UPF2 are located in the same satellite (denoted as satellite 4).
- satellite 1 to satellite 4 are different from each other.
- This embodiment is applied to the scenario where UE1 and UE2 have handover conflicts, corresponding to the above scenario 2.
- this scenario can be understood as: when the SMF receives the handover instruction sent by the UE1 side, it has received the handover instruction sent by the UE2 side, or when the SMF receives the handover instruction sent by the UE2 side, it has received the handover instruction sent by the UE1 side.
- Switch instructions The following only takes the SMF as an example to explain how to update the tunnel information of the source UPF2 serving UE2 and how to update the tunnel information of the target UPF2 serving UE2 when the SMF receives the handover instruction sent by the UE1 side and has received the handover instruction sent by the UE2 side. As shown in Figure 7.
- the process of UE2 switching from source RAN2 to target RAN2 may refer to the process of UE1 switching from source RAN1 to target RAN1 (i.e. step 1 to step 5).
- step 1 to step 5 may refer to step 1 to step 5 in Embodiment 1. No further details will be given here.
- Step 6 The target RAN2 sends a path switching request message to the AMF.
- the path switching request message contains the information of the second session.
- the second session is a session to be switched by UE2, and the second session is a session established for UE2 to communicate with UE1.
- Step 7 The AMF sends a session management context update request message to the SMF.
- the session management context update request message contains switching indication information, and the switching indication information indicates that the second session is to be switched.
- Step 8 The target RAN1 sends a path switching request message to the AMF.
- the path switching request message contains the information of the first session.
- the first session is a session to be switched by UE1, and the first session is a session established for UE1 to communicate with UE2.
- Step 9 SMF sends an N4 session establishment request message to target UPF2.
- the SMF determines that the UPF serving the second session needs to be switched according to step 7, selects the target UPF2 to serve the second session, and sends an N4 session establishment request message to the target UPF2.
- SMF allocates a tunnel targeting UPF2.
- the tunnel refers to the tunnel through which the source UPF1 serving UE1 communicates with the target UPF2 serving UE2.
- the tunnel information of target UPF2 is used by source UPF1 to send data to target UPF2.
- the N4 session establishment request message includes the tunnel information of the source UPF1, and the tunnel information of the source UPF1 is used by the target UPF2 to send data to the source UPF1.
- Step 10 Target UPF2 sends an N4 session establishment response message to SMF.
- Step 11 The AMF sends a session management context update request message to the SMF.
- the session management context update request message contains switching indication information, and the switching indication information indicates that the first session is to be switched.
- the SMF determines that the UPF serving the first session needs to be switched, selects the target UPF1 to serve the first session, and sends an N4 session establishment request message to the target UPF1.
- SMF allocates a tunnel targeting UPF1. This tunnel refers to the tunnel through which the source UPF2 serving UE2 communicates with the target UPF1 serving UE1, and is also the tunnel through which the target UPF2 serving UE2 communicates with the target UPF1 serving UE1.
- the N4 session establishment request message contains tunnel information of the target UPF1.
- the N4 session establishment request message also includes tunnel information of the target UPF2 and tunnel information of the source UPF2.
- Step 13 Target UPF1 sends an N4 session establishment response message to SMF.
- Step 14 SMF sends an N4 session update request message to source UPF1.
- the N4 session update request message contains the tunnel information of the target UPF1.
- the N4 session update request message includes N4 container 1 containing the tunnel information of the target UPF1 and N4 container 2 containing the tunnel information of the target UPF1.
- N4 container 1 contains the N4 session update request message sent by SMF to the target UPF2.
- the N4 session update request message contains the tunnel information of the target UPF1.
- N4 container 2 contains the N4 session update request message sent by SMF to the source UPF2.
- the N4 session The update request message contains tunnel information for target UPF1.
- SMF also sends the tunnel information of the target UPF2 to the source UPF1.
- the N4 session establishment response message also includes second indication information.
- the second indication information is used to instruct the source UPF1 to send the second information to the target UPF2 and to send the third information to the source UPF2.
- the second information is used to instruct the source UPF1 to send the second information to the target UPF2.
- UPF2 communicates with target UPF1, and the third information is used for source UPF2 to communicate with target UPF1.
- the second information includes the tunnel information of the target UPF1 or the N4 container 1 containing the tunnel information of the target UPF1, and the third information includes the tunnel information of the target UPF1 or the N4 container 2 containing the tunnel information of the target UPF1.
- the second indication information may also indicate other content.
- Step 15 Source UPF1 sends an N4 session update response message to SMF.
- Step 16 Source UPF1 sends the third information to source UPF2.
- source UPF1 sends a data packet to source UPF2, and the data packet includes third information.
- the data packet contains the tunnel information of the target UPF1.
- the packet contains N4 container 2 containing tunnel information for target UPF1.
- the source UPF1 sends an end mark data packet to the source UPF2.
- the end mark data packet is used to synchronize the order of data packets, that is, to notify the source RAN2 to stop sending data packets and to notify the target RAN2 to start sending data packets.
- source UPF1 sends the end mark data packet to source UPF2, source UPF2 forwards the end mark data packet to source RAN2, and source RAN2 sends the end mark data packet to target RAN2.
- the data packet also includes second information.
- the tunnel information of the target UPF1 is included in the data packet.
- the target RAN2 sends the tunnel information of the target UPF1 to Target UPF2.
- the data packet contains N4 container 1 containing the tunnel information of the target UPF1 and the tunnel information containing the target UPF1 N4 container 2.
- the target RAN2 sends the N4 container 1 containing the tunnel information of the target UPF1 to the target UPF2. Therefore, there is no need to perform step 18 and step 19 is performed directly.
- source UPF1 constructs a data packet and sends the data packet to source UPF2.
- the tunnel information of the target UPF1 is included in the packet.
- the data packet contains the N4 container 2 containing the tunnel information of the target UPF1.
- Source UPF2 updates the routing rules according to the received third information. For details, please refer to step 13 in Embodiment 1.
- Step 18 The source UPF1 sends the second information to the target UPF2.
- the source UPF1 sends a data packet to the target UPF2, and the data packet includes second information.
- the source UPF1 after the source UPF1 receives the second indication information, the source UPF1 adds the second information to the first data packet sent to UPF2, and the source UPF1 sends the data packet to the target UPF2.
- the source UPF1 directly constructs a data packet, the constructed data packet contains the second information, and the source UPF1 sends the constructed data packet to the target UPF2.
- Step 19 The target UPF2 updates the routing rules according to the received second information. For details, please refer to step 13 in Embodiment 1.
- Step 20 The SMF sends a session management context update response message to the AMF.
- the session management context update response message is used to confirm that the second session has been switched.
- Step 21 The AMF sends a path switching response message to the target RAN2.
- the path switching response message is used to confirm that UE2 has completed the path switching.
- Step 22 The SMF sends a session management context update response message to the AMF.
- the session management context update response message is used to confirm that the first session has completed switching.
- Step 23 The AMF sends a path switching response message to the target RAN1.
- the path switching response message is used to confirm that UE1 has completed the path switching.
- the above embodiment can be used to reduce the round-trip interaction between the SMF and the source UPF2 and the round-trip interaction between the SMF and the target UPF2, thereby shortening the delay of the handover process of UE1 and the handover process of UE2. delay.
- Embodiment 3 provides another communication method, as shown in Figure 8.
- Steps 1 to 13 may refer to step 1 to step 13 in the above-mentioned embodiment 2, which are not shown in Figure 8 .
- Step 14 SMF sends an N4 session update request message to source UPF2.
- the N4 session update request message contains the tunnel information of the target UPF2 and the tunnel information of the target UPF1.
- the N4 session update request message includes an N4 container 3 containing tunnel information of the target UPF2 and an N4 container 4 containing tunnel information of the target UPF1.
- SMF also sends the tunnel information of the target UPF1 to the source UPF2.
- the N4 session establishment response message includes third indication information.
- the third indication information is used to instruct the source UPF2 to send the fourth information to the source UPF1.
- the fourth information includes the tunnel information of the target UPF2 and the tunnel information of the target UPF1, or contains the tunnel of the target UPF2.
- Step 15 Source UPF2 sends an N4 session update response message to SMF.
- Step 16 Source UPF2 sends the fourth information to source UPF1.
- source UPF2 sends a data packet to source UPF1, and the data packet includes fourth information.
- source UPF2 sends an end marker packet.
- the end marker packet includes fourth information.
- source UPF2 constructs a data packet and sends the constructed data packet to source UPF1.
- the constructed data packet includes fourth information.
- the source UPF2 after receiving the data packet from UE2 to UE1, the source UPF2 adds fourth information to the data packet.
- Step 17 After the source UPF1 receives the fourth information, the source UPF1 updates the routing rules according to the received fourth information.
- Step 18A The source UPF1 sends an end mark packet, and the end mark packet contains the N4 container 4 or the tunnel information of the target UPF1 that contains the tunnel information of the target UPF1.
- the end mark data packet is sent from source UPF1 to source UPF2, and then sent to source RAN2 through source UPF2.
- the source RAN2 forwards it to target RAN2, and target RAN2 sends the received end mark data packet to target UPF2.
- Step 18B After receiving the data packet sent by UE1 to UE2, the source UPF1 adds the N4 container 4 containing the tunnel information of the target UPF1 or the tunnel information of the target UPF1 to the data packet, and sends the data packet to the target UPF2.
- step 18A or step 18B is performed.
- Step 19 After receiving the tunnel information of N4 container 4 or target UPF1 that contains the tunnel information of target UPF1, target UPF2 updates the routing rules according to the tunnel information of N4 container 4 or target UPF1 that contains the tunnel information of target UPF1.
- Steps 20 to 23 may refer to steps 20 to 23 in Embodiment 1.
- the above embodiment can be used to reduce the round-trip interaction between the SMF and the source UPF2 and the round-trip interaction between the SMF and the target UPF2, thereby shortening the delay of the handover process of UE1 and the handover process of UE2. delay.
- FIG. 9 shows a possible exemplary block diagram of a communication device involved in the embodiment of the present application.
- the device 900 includes: a transceiver module 920 and a processing module 910.
- the transceiver module 920 may include a receiving unit and a sending unit.
- the processing module 910 is used to control and manage the actions of the device 900 .
- the transceiver module 920 is used to support communication between the device 900 and other network entities.
- the device 900 may further include a storage unit used to store program codes and data of the device 900 .
- each module in the device 900 may be implemented by software.
- the processing module 910 may be a processor or a controller, such as a general-purpose central processing unit (CPU), a general-purpose processor, a digital signal processing (DSP), or an application-specific integrated circuit. specific integrated circuits (ASIC), field programmable gate array (FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. It may implement or execute various exemplary logical blocks, modules and circuits described in conjunction with the disclosure of the embodiments of this application.
- the processor may also be a combination that implements computing functions, such as one or more microprocessors. Processor combinations, DSP and microprocessor combinations, etc.
- the transceiver module 920 may be a communication interface, a transceiver, a transceiver circuit, etc., where the communication interface is a general term.
- the communication interface may include multiple interfaces, and the storage unit may be a memory.
- the processing module 910 in the device 900 can support the device 900 to perform the actions of the first user plane network element in the above method examples.
- the transceiver module 920 can support the device 900 to communicate with the session management network element.
- the transceiver module 920 can support the device 900 to perform steps 410 and 420 in Figure 4 .
- the processing module 910 calls the transceiver module 920 to execute:
- Receive first indication information from the session management network element instructs the first user plane network element to send first information to the second user plane network element, the first information is used for the second user
- a plane network element communicates with the first user plane network element; and sends the first information to the second user plane network element.
- the transceiver module 920 is configured to send a first data packet to the second user plane network element when sending the first information to the second user plane network element.
- a data packet includes the first information.
- the processing module 910 is configured to construct the first data packet before sending the first data packet to the second user plane network element, and the first data packet includes the first data packet. information.
- the transceiver module 920 is configured to receive the first data packet that needs to be sent to the second user plane network element after receiving the first indication information before sending the first data packet to the second user plane network element.
- the data packet of the second user plane network element; the processing module 910 is configured to add the first information to the first data packet that needs to be sent to the second user plane network element, and add the first information to the data packet of the second user plane network element.
- the first data packet after a piece of information that needs to be sent to the second user plane network element is used as the first data packet.
- the first information includes information about a first tunnel
- the first tunnel is a tunnel through which the second user plane network element communicates with the first user plane network element.
- the information of the first tunnel is included in a first transparent transmission container.
- the transceiving module 920 is configured to receive the first information from the session management network element.
- the device 900 may correspond to the first user plane network element in the foregoing method embodiment, and the operations and/or functions of each module in the device 900 are respectively to realize the first user plane in the foregoing method embodiment.
- the corresponding steps of the network element-facing method can also achieve the beneficial effects in the foregoing method embodiments. For the sake of brevity, they will not be described again here.
- the processing module 910 in the device 900 can support the device 900 to perform the actions of the session management network element in the above method examples.
- the transceiver module 920 can support the device 900 to communicate with the session management network element.
- the transceiver module 920 can support the device 900 to perform steps 400 and 410 in Figure 4 .
- the processing module 910 calls the transceiver module 920 to execute:
- Receive switching indication information indicates that a first session of the first terminal device is to be switched, and the first session is a session used by the first terminal device to communicate with the second terminal device; to the first user plane
- the network element sends first instruction information, the first instruction information instructs the first user plane network element to send first information to the second user plane network element, wherein the first information is used for the second user plane
- the network element communicates with the first user plane network element, the first user plane network element serves the first terminal device after the first session switching, and the second user plane network element serves the first user plane network element.
- the first information includes information about the first tunnel
- the first tunnel is the A tunnel for communication between the second user plane network element and the first user plane network element.
- the information of the first tunnel is included in a first transparent transmission container.
- the transceiving module 920 is configured to send the first information to the first user plane network element.
- the device 900 may correspond to the session management network element in the foregoing method embodiment, and the operations and/or functions of each module in the device 900 are respectively to implement the session management network element in the foregoing method embodiment.
- the corresponding steps of the method can also achieve the beneficial effects in the foregoing method embodiments. For the sake of simplicity, they will not be described again here.
- the processing module 910 in the device 900 can support the device 900 to perform the actions of the second user plane network element in the above method examples, for example
- the processing module 910 may support the device 900 to perform step 430 in FIG. 4 .
- the transceiver module 920 can support the device 900 to communicate with the second user plane network element.
- the transceiver module 920 can support the device 900 to perform step 420 in Figure 4 .
- the transceiver module 920 is configured to receive first information from the first user plane network element, and the first information is used for communication between the second user plane network element and the first user plane network element; the processing module 910, For updating routing rules according to the first information, the routing rules are used for the second user plane network element to forward data to the first user plane network element, and the first user plane network element is the third user plane network element.
- a terminal equipment service, the second user plane network element serves the second terminal equipment.
- the first information includes information about a first tunnel
- the first tunnel is a tunnel through which the second user plane network element communicates with the first user plane network element.
- the information of the first tunnel is included in a transparent transmission container.
- the device 900 may correspond to the second user plane network element in the foregoing method embodiment, and the operations and/or functions of each module in the device 900 are respectively to realize the second user plane in the foregoing method embodiment.
- the corresponding steps of the network element-facing method can also achieve the beneficial effects in the foregoing method embodiments. For the sake of brevity, they will not be described again here.
- the processing module 910 in the device 900 can support the device 900 to perform the actions of the session management network element in the above method examples.
- the transceiver module 920 can support the device 900 to communicate with the session management network element.
- the transceiver module 920 can support the device 900 to perform steps 500, 510 and 520 in Figure 5 .
- the processing module 910 calls the transceiver module 920 to execute:
- Receive second switching indication information indicates that a second session of the second terminal device is to be switched, wherein the second session is a session used by the second terminal device to communicate with the first terminal device ;
- the first switching instruction information indicates that the first session of the first terminal device is to be switched, wherein the first session is the third session
- a terminal device is used for a session of communication with the second terminal device; sending second instruction information to the first source user plane network element, and the second instruction information is used to instruct the first source user plane network element to the first source user plane network element.
- the second target user plane network element sends the second information, and sends the third information to the second source user plane network element, wherein the second source user plane network element is the second terminal device before the second session switching.
- the second target user plane network element serves the second terminal device after the second session switch, and the second information is used between the second target user plane network element and the first target user plane Network element communication, the third information is used for communication between the second source user plane network element and the first target user plane network element, and the first source user plane network element is before the first session switching.
- the first terminal device serves, and the first target user plane network element serves the first terminal device after the first session switching.
- the second information includes information about a second tunnel, and the second tunnel is a tunnel through which the second target user plane network element communicates with the first target user plane network element;
- the third information includes information about a third tunnel, and the third tunnel is a tunnel for communication between the second source user plane network element and the first target user plane network element.
- the information of the second tunnel is included in a second transparent transmission container
- the information of the third tunnel is included in a third transparent transmission container.
- the transceiver module 920 is used to send the second information to the first source user plane network element; and/or the transceiver module 920 is used to send the second information to the first source user plane network element. Send the third information.
- the device 900 may correspond to the session management network element in the foregoing method embodiment, and the operations and/or functions of each module in the device 900 are respectively to implement the session management network element in the foregoing method embodiment.
- the corresponding steps of the method can also achieve the beneficial effects in the foregoing method embodiments. For the sake of simplicity, they will not be described again here.
- the processing module 910 in the device 900 can support the device 900 to perform the steps of the first source user plane network element in the above method examples. action.
- the transceiver module 920 can support the device 900 to communicate with the first source user plane network element.
- the transceiver module 920 can support the device 900 to perform steps 520, 530 and 540 in Figure 5.
- the processing module 910 calls the transceiver module 920 to execute:
- Second instruction information is received from the session management network element.
- the second instruction information is used to instruct the first source user plane network element to send the second information to the second target user plane network element and to the second source user plane network element.
- Send third information wherein the second source user plane network element and the second target user plane network element serve the second terminal device, and the second information is used for the second target user plane network element and the second target user plane network element to serve the second terminal device.
- the first target user plane network element communicates, the third information is used for communication between the second source user plane network element and the first target user plane network element, the first source user plane network element and the third A target user plane network element serves the first terminal device; sends the second information to the second target user plane network element, and sends the third information to the second source user plane network element.
- the transceiving module 920 is configured to receive the second information and/or the third information from the session management network element.
- the second information includes information about a second tunnel, and the second tunnel is a tunnel through which the second target user plane network element communicates with the first target user plane network element;
- the third information includes information about a third tunnel, and the third tunnel is a tunnel for communication between the second source user plane network element and the first target user plane network element.
- the information of the second tunnel is included in a second transparent transmission container
- the information of the third tunnel is included in a third transparent transmission container.
- the transceiver module 920 is configured to send the second information to the second target user plane network element and the third information to the second source user plane network element.
- the network element sends a second data packet, where the second data packet includes the second information, and sends a third data packet to the second source user plane network element, where the third data packet includes third information.
- the processing module 910 is configured to construct the second data packet before sending the second data packet to the second target user plane network element, and the first data packet includes the first data packet. 2. Information.
- the transceiver module 920 is configured to receive the first data packet that needs to be sent to the second target user plane network element after receiving the second indication information before sending the second data packet to the second target user plane network element.
- the data packet of the second target user plane network element; the processing module 910 is configured to add the second information to the first data packet that needs to be sent to the second target user plane network element.
- the first need after the second information is sent to the second target user The data packet of the network element is used as the second data packet.
- the third data packet is an end mark data packet.
- the device 900 may correspond to the first source user plane network element in the foregoing method embodiment, and the operations and/or functions of each module in the device 900 are respectively to implement the first source user plane network element in the foregoing method embodiment.
- the corresponding steps of the method of sourcing user plane network elements can also achieve the beneficial effects in the foregoing method embodiments. For the sake of brevity, they will not be described again here.
- Figure 10 shows a schematic structural diagram of a communication device 1000 according to an embodiment of the present application.
- the device 1000 includes: a processor 1001.
- the processor 1001 is used to call an interface to perform the following actions:
- Receive first indication information from the session management network element instructs the first user plane network element to send first information to the second user plane network element, the first information is used for the second user
- a plane network element communicates with the first user plane network element; and sends the first information to the second user plane network element.
- the device 1000 can also be used to perform other steps and/or operations on the first user plane network element side in the previous embodiments. For the sake of brevity, they will not be described again here.
- the device 1000 is a session management network element or a chip in a session management network element
- the processor 1001 is used to call an interface to perform the following actions:
- Receive switching indication information indicates that a first session of the first terminal device is to be switched, and the first session is a session used by the first terminal device to communicate with the second terminal device; to the first user plane
- the network element sends first instruction information, the first instruction information instructs the first user plane network element to send first information to the second user plane network element, wherein the first information is used for the second user plane
- the network element communicates with the first user plane network element, the first user plane network element serves the first terminal device after the first session switching, and the second user plane network element serves the first user plane network element.
- the device 1000 can also be used to perform other steps and/or operations on the session management network element side in the previous embodiments. For the sake of brevity, they will not be described again here.
- the processor 1001 is used to call an interface to perform the following actions:
- the first user plane network element serves the first terminal device.
- the second user plane network element Yuan serves the second terminal device.
- the device 1000 can also be used to perform other steps and/or operations on the second user plane network element side in the previous embodiments. For the sake of brevity, they will not be described again here.
- the device 1000 is a session management network element or a chip in a session management network element
- the processor 1001 is used to call an interface to perform the following actions:
- Receive second switching indication information indicates that a second session of the second terminal device is to be switched, wherein the second session is a session used by the second terminal device to communicate with the first terminal device ;
- receive the first switching instruction information indicates that the first session of the first terminal device is to be switched, wherein the first session is the third session A terminal device is used for a session of communicating with the second terminal device; sending second indication information to the first source user plane network element, the second indication information being used to indicate the third A source user plane network element sends second information to a second target user plane network element, and sends third information to a second source user plane network element, wherein the second source user plane network element switches during the second session.
- the second target user plane network element Before serving the second terminal device, the second target user plane network element serves the second terminal device after the second session switching, and the second information is used for the second target user plane.
- the network element communicates with the first target user plane network element, and the third information is used for the communication between the second source user plane network element and the first target user plane network element.
- the first source user plane network element is in The first user plane network element serves the first terminal device before the first session is switched, and the first target user plane network element serves the first terminal device after the first session is switched.
- the device 1000 can also be used to perform other steps and/or operations on the session management network element side in the previous embodiments. For the sake of brevity, they will not be described again here.
- the processor 1001 is used to call an interface to perform the following actions:
- Second instruction information is received from the session management network element.
- the second instruction information is used to instruct the first source user plane network element to send the second information to the second target user plane network element and to the second source user plane network element.
- Send third information wherein the second source user plane network element and the second target user plane network element serve the second terminal device, and the second information is used for the second target user plane network element and the second target user plane network element to serve the second terminal device.
- the first target user plane network element communicates, the third information is used for communication between the second source user plane network element and the first target user plane network element, the first source user plane network element and the third A target user plane network element serves the first terminal device; sends the second information to the second target user plane network element, and sends the third information to the second source user plane network element.
- the device 1000 can also be used to perform other steps and/or operations on the first source user plane network element side in the previous embodiments. For the sake of brevity, they will not be described again here.
- the processor 1001 can call an interface to perform the above transceiver action, where the called interface can be a logical interface or a physical interface, which is not limited.
- the physical interface can be implemented via transceivers.
- the device 1000 further includes a transceiver 1003.
- the device 1000 also includes a memory 1002, in which the program code in the above method embodiment can be stored, so that the processor 1001 can call it.
- the device 1000 includes a processor 1001, a memory 1002, and a transceiver 1003, the processor 1001, the memory 1002, and the transceiver 1003 communicate with each other through internal connection paths to transmit control and/or data signals.
- the processor 1001, the memory 1002, and the transceiver 1003 can be implemented on a chip.
- the processor 1001, the memory 1002, and the transceiver 1003 can be implemented on the same chip, or they can be implemented on different chips. Or any two functions can be combined in one chip.
- the memory 1002 can store program codes, and the processor 1001 calls the program codes stored in the memory 1002 to implement corresponding functions of the device 1000 .
- the methods disclosed in the above embodiments of the present application can be applied in a processor or implemented by the processor.
- the processor may be an integrated circuit chip that has signal processing capabilities. During the implementation process, each step of the above method embodiment can be completed through an integrated logic circuit of hardware in the processor or instructions in the form of software.
- the above-mentioned processor may be a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), an off-the-shelf programmable gate array (field programmable gate array, FPGA), or other available processors.
- Programmable logic devices discrete gate or transistor logic devices, discrete hardware components, system on chip (SoC), central processor unit (CPU), or network processor (network processor) processor, NP), it can also be a digital signal processor (DSP), it can be a microcontroller (micro controller unit, MCU), or it can be a programmable controller (programmable logic device, PLD) or other integrated chips.
- SoC system on chip
- CPU central processor unit
- NP network processor
- DSP digital signal processor
- MCU microcontroller
- PLD programmable controller
- Each method, step and logical block diagram disclosed in the embodiment of this application can be implemented or executed.
- a general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc.
- the steps of the method disclosed in conjunction with the embodiments of the present application can be directly implemented by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor.
- the software module can be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other mature storage media in this field.
- the storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.
- non-volatile memory can be read-only memory (ROM), programmable ROM (PROM), erasable programmable read-only memory (erasable PROM, EPROM), electrically removable memory. Erase electrically programmable read-only memory (EPROM, EEPROM) or flash memory. Volatile memory can be random access memory (RAM), which is used as an external cache.
- RAM random access memory
- RAM static random access memory
- DRAM dynamic random access memory
- SDRAM synchronous dynamic random access memory
- double data rate SDRAM double data rate SDRAM
- DDR SDRAM double data rate SDRAM
- ESDRAM enhanced synchronous dynamic random access memory
- SLDRAM synchronous link dynamic random access memory
- direct rambus RAM direct rambus RAM
- the disclosed systems, devices and methods can be implemented in other ways.
- the device embodiments described above are only illustrative.
- the division of the units is only a logical function division. In actual implementation, there may be other division methods.
- multiple units or components may be combined or can be integrated into another system, or some features can be ignored, or not implemented.
- the coupling or direct coupling or communication connection between each other shown or discussed may be through some interfaces, and the indirect coupling or communication connection of the devices or units may be in electrical, mechanical or other forms.
- the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or they may be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.
- each functional unit in each embodiment of the present application can be integrated into one processing unit, each unit can exist physically alone, or two or more units can be integrated into one unit.
- the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium.
- the technical solution of the present application is essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product.
- the computer The software product is stored in a storage medium and includes a number of instructions to cause a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of this application.
- the aforementioned storage media include: U disk, mobile hard disk, read-only memory ROM, random access memory RAM, magnetic disk or optical disk and other various media that can store program codes.
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Abstract
一种通信方法及装置,该方法包括:第一用户面网元从会话管理网元接收第一指示信息,第一指示信息指示第一用户面网元向第二用户面网元发送第一信息,第一信息用于第二用户面网元与第一用户面网元通信。第一用户面网元向第二用户面网元发送第一信息。采用上述方法,会话管理网元向第一用户面网元发送第一指示信息,进而实现将需要发送给第二用户面网元的第一信息,通过第一用户面网元发送给第二用户面网元,减少了一次会话管理网元与第二用户面网元的交互。
Description
相关申请的交叉引用
本申请要求在2022年03月04日提交中国专利局、申请号为202210207514.9、申请名称为“一种通信方法及装置”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。
本申请实施例涉及无线通信领域,尤其涉及一种通信方法及装置。
在标准研究过程中,卫星通信逐渐成为热点,卫星通信能够补充地面通信很难覆盖的一些场景,如沙漠、海洋等。在卫星通信的场景下,可能涉及到将原来部署于地面的网元部署到卫星的情况,例如将无线接入网络(radio access network,RAN)和用户面功能(user plane function,UPF)部署到卫星上。
在RAN和UPF均部署在卫星的场景下,卫星间需要建立隧道,即部署在不同卫星上的UPF之间的隧道。例如,假设用户设备(user equipment,UE)1和UE2分别接入RAN1和RAN2,RAN1与UPF1部署在一个卫星上,RAN2与UPF2部署在另一个卫星上。在UE1与UE2通信的场景下,UE1对应的UPF1与UE2对应的UPF2之间需要建立隧道。UE1对应的UPF1保存UE2对应的UPF2的隧道信息,用于与UE2对应的UPF2进行通信。UE2对应的UPF2保存UE1对应的UPF1的隧道信息,用于与UE1对应的UPF1进行通信。
但是,在UE切换接入的RAN的过程中,部署在地面的核心网设备需要与卫星交互多次,以更新UPF保存的隧道信息,导致切换时延较长。
例如,假设UE1和UE2分别接入RAN1和RAN2,RAN1与UPF1部署在一个卫星上,RAN2与UPF2部署在另一个卫星上。在UE1与UE2通信的场景下,当UE1从RAN1切换至RAN3时,RAN3与UPF3部署在一个卫星上,部署在地面上的核心网设备需要与UE2对应的UPF2通信,将UE1对应的UPF3的隧道信息更新到UE2对应的UPF2,部署在地面上的核心网设备还需要与UE1对应的UPF3通信,将UE2对应的UPF2的Nx隧道信息更新到UE1对应的UPF3。由于部署在地面上的核心网设备和卫星距离较远,因此,将会导致切换时延较长。
发明内容
本申请提供一种通信方法及装置,用以解决在UE切换接入的RAN的过程中切换时延较长的问题。
第一方面,本申请提供一种通信方法,该方法包括:第一用户面网元从会话管理网元接收第一指示信息,所述第一指示信息指示所述第一用户面网元向第二用户面网元发送第一信息,所述第一信息用于所述第二用户面网元与所述第一用户面网元通信;所述第一用户面网元向所述第二用户面网元发送所述第一信息。
采用上述方法,会话管理网元向第一用户面网元发送第一指示信息,进而实现将需要发送给第二用户面网元的第一信息,通过第一用户面网元发送给第二用户面网元,减少了一次会话管理网元与第二用户面网元的交互,实现缩短第一终端设备的切换过程的时延。
在一种可能的设计中,所述第一用户面网元向所述第二用户面网元发送第一数据包,所述第一数据包包括所述第一信息。
采用上述设计,通过第一数据包携带第一信息,可以在无需增加额外的时延和信令的情况下,第一用户面网元将第一信息发送给第二用户面网元。
在一种可能的设计中,在所述第一用户面网元向所述第二用户面网元发送第一数据包前,所述第一用户面网元构造所述第一数据包,所述第一数据包包含所述第一信息。
在一种可能的设计中,在所述第一用户面网元向所述第二用户面网元发送第一数据包前,所述第一用户面网元在接收到所述第一指示信息之后接收到第一个需要发送给所述第二用户面网元的数据包;所述第一用户面网元在所述第一个需要发送给所述第二用户面网元的数据包中增加所述第一信息,将增加所述第一信息后的所述第一个需要发送给所述第二用户面网元的数据包作为第一数据包。
采用上述设计,能够实现及时传输第一信息,进而可以实现缩短终端设备的切换过程的时延。
在一种可能的设计中,所述第一信息包括第一隧道的信息,所述第一隧道为所述第二用户面网元与所述第一用户面网元通信的隧道。
在一种可能的设计中,所述第一隧道的信息包含在第一透传容器中。
在一种可能的设计中,还包括:所述第一用户面网元从会话管理网元接收所述第一信息。
第二方面,本申请一种通信方法,该方法包括:会话管理网元接收切换指示信息,所述切换指示信息指示第一终端设备的第一会话待切换,所述第一会话是所述第一终端设备用于与第二终端设备通信的会话;向第一用户面网元发送第一指示信息,所述第一指示信息指示所述第一用户面网元向第二用户面网元发送第一信息,其中,所述第一信息用于所述第二用户面网元与所述第一用户面网元通信,所述第一用户面网元在所述第一会话切换后为所述第一终端设备服务,所述第二用户面网元为所述第二终端设备服务。
采用上述方法,会话管理网元向第一用户面网元发送第一指示信息,进而实现将需要发送给第二用户面网元的第一信息,通过第一用户面网元发送给第二用户面网元,减少了一次会话管理网元与第二用户面网元的交互,实现缩短第一终端设备的切换过程的时延。
在一种可能的设计中,所述第一信息包括所述第一隧道的信息,所述第一隧道为所述第二用户面网元与所述第一用户面网元通信的隧道。
在一种可能的设计中,所述第一隧道的信息包含在第一透传容器中。
在一种可能的设计中,还包括:向所述第一用户面网元发送所述第一信息。
采用上述设计,会话管理网元可以实现分配第一隧道,并向第一用户面网元发送第一信息。
第三方面,本申请提供一种通信方法,该方法包括:第二用户面网元从第一用户面网元接收第一信息,所述第一信息用于所述第二用户面网元与所述第一用户面网元通信;所述第二用户面网元根据所述第一信息更新路由规则,所述路由规则用于所述第二用户面网元向所述第一用户面网元转发数据,所述第一用户面网元为所述第一终端设备服务,所述
第二用户面网元为所述第二终端设备服务。
采用上述方法,第二用户面网元可以从第一用户面网元获得第一信息,进而根据第一信息更新路由规则。
在一种可能的设计中,所述第一信息包括第一隧道的信息,所述第一隧道为所述第二用户面网元与所述第一用户面网元通信的隧道。
在一种可能的设计中,所述第一隧道的信息包含在透传容器中。
第四方面,本申请提供一种通信方法,该方法包括:会话管理网元接收第二切换指示信息,所述第二切换指示信息指示第二终端设备的第二会话待切换,其中,所述第二会话是所述第二终端设备用于与第一终端设备通信的会话;在接收所述第二切换指示信息之后,接收第一切换指示信息,所述第一切换指示信息指示第一终端设备的第一会话待切换,其中,所述第一会话为是所述第一终端设备用于与所述第二终端设备通信的会话;向第一源用户面网元发送第二指示信息,所述第二指示信息用于指示所述第一源用户面网元向第二目标用户面网元发送第二信息,向第二源用户面网元发送第三信息,其中,所述第二源用户面网元在所述第二会话切换前为所述第二终端设备服务,所述第二目标用户面网元在所述第二会话切换后为所述第二终端设备服务,所述第二信息用于所述第二目标用户面网元与第一目标用户面网元通信,所述第三信息用于所述第二源用户面网元与所述第一目标用户面网元通信,所述第一源用户面网元在所述第一会话切换前为所述第一终端设备服务,所述第一目标用户面网元在所述第一会话切换后为所述第一终端设备服务。
采用上述方法,会话管理网元向第一源用户面网元发送第二指示信息,进而实现将需要发送给第二目标用户面网元的第二信息和第二源用户面网元的第三信息,通过第一源用户面网元发送,减少了会话管理网元与第二目标用户面网元和第二源用户面网元的交互。
在一种可能的设计中,所述第二信息包括第二隧道的信息,所述第二隧道为所述第二目标用户面网元与所述第一目标用户面网元通信的隧道;所述第三信息包括第三隧道的信息,所述第三隧道为所述第二源用户面网元与所述第一目标用户面网元通信的隧道。
在一种可能的设计中,所述第二隧道的信息包含在第二透传容器中,所述第三隧道的信息包含在第三透传容器中。
在一种可能的设计中,还包括:所述会话管理网元向所述第一源用户面网元发送所述第二信息,和/或,向所述第一源用户面网元发送所述第三信息。
第五方面,本申请提供一种通信方法,该方法包括:
第一源用户面网元从会话管理网元接收第二指示信息,所述第二指示信息用于指示所述第一源用户面网元向第二目标用户面网元发送第二信息,向第二源用户面网元发送第三信息,其中,所述第二源用户面网元和所述第二目标用户面网元为第二终端设备服务,所述第二信息用于所述第二目标用户面网元与第一目标用户面网元通信,所述第三信息用于所述第二源用户面网元与所述第一目标用户面网元通信,所述第一源用户面网元和所述第一目标用户面网元为所述第一终端设备服务;所述第一源用户面网元向所述第二目标用户面网元发送所述第二信息,向所述第二源用户面网元发送所述第三信息。
采用上述方法,会话管理网元向第一源用户面网元发送第二指示信息,进而实现将需要发送给第二目标用户面网元的第二信息和第二源用户面网元的第三信息,通过第一源用户面网元发送,减少了会话管理网元与第二目标用户面网元和第二源用户面网元的交互。
在一种可能的设计中,还包括:所述第一源用户面网元从所述会话管理网元接收所述
第二信息和/或所述第三信息。
在一种可能的设计中,所述第二信息包括第二隧道的信息,所述第二隧道为所述第二目标用户面网元与所述第一目标用户面网元通信的隧道;所述第三信息包括第三隧道的信息,所述第三隧道为所述第二源用户面网元与所述第一目标用户面网元通信的隧道。
在一种可能的设计中,所述第二隧道的信息包含在第二透传容器中,所述第三隧道的信息包含在第三透传容器中。
在一种可能的设计中,所述第一源用户面网元向所述第二目标用户面网元发送第二数据包,所述第二数据包包括所述第二信息,向所述第二源用户面网元发送第三数据包,所述第三数据包包括第三信息。
采用上述设计,通过第二数据包携带第二信息,第三数据包携带第三信息,可以在无需增加额外的时延和信令的情况下,第一源用户面网元将第二信息发送给第二目标用户面网元,将第三信息发送给第二源目标用户面网元。
在一种可能的设计中,在所述第一源用户面网元向所述第二目标用户面网元发送第二数据包前,所述第一源用户面网元构造所述第二数据包,所述第一数据包包含所述第二信息。
在一种可能的设计中,在所述第一源用户面网元向所述第二目标用户面网元发送第二数据包前,所述第一源用户面网元在接收到所述第二指示信息之后接收到第一个需要发送给所述第二目标用户面网元的数据包;所述第一源用户面网元在所述第一个需要发送给所述第二目标用户面网元的数据包中增加所述第二信息,将增加所述第二信息后的所述第一个需要发送给第二目标用户面网元的数据包作为第二数据包。
采用上述设计,能够实现及时传输第二信息,进而可以实现缩短第一终端设备的切换过程的时延和第一终端设备的切换过程的时延。
在一种可能的设计中,所述第三数据包为结束标记数据包。
第六方面,本申请提供一种通信装置,所述装置为第一用户面网元或用于实现第一用户面网元的功能的装置,所述装置包括:收发单元和处理单元;所述处理单元调用所述收发单元执行:从会话管理网元接收第一指示信息,所述第一指示信息指示所述第一用户面网元向第二用户面网元发送第一信息,所述第一信息用于所述第二用户面网元与所述第一用户面网元通信;向所述第二用户面网元发送所述第一信息。
在一种可能的设计中,所述收发单元,用于在向所述第二用户面网元发送所述第一信息时,向所述第二用户面网元发送第一数据包,所述第一数据包包括所述第一信息。
在一种可能的设计中,所述处理单元,用于在向所述第二用户面网元发送第一数据包前,构造所述第一数据包,所述第一数据包包含所述第一信息。
在一种可能的设计中,所述收发单元,用于在向所述第二用户面网元发送第一数据包前,在接收到所述第一指示信息之后接收到第一个需要发送给所述第二用户面网元的数据包;所述处理单元,用于在所述第一个需要发送给所述第二用户面网元的数据包中增加所述第一信息,将增加所述第一信息后的所述第一个需要发送给所述第二用户面网元的数据包作为第一数据包。
在一种可能的设计中,所述第一信息包括第一隧道的信息,所述第一隧道为所述第二用户面网元与所述第一用户面网元通信的隧道。
在一种可能的设计中,所述第一隧道的信息包含在第一透传容器中。
在一种可能的设计中,所述收发单元,用于从会话管理网元接收所述第一信息。
第七方面,本申请一种通信装置,所述装置为会话管理网元或用于实现会话管理网元的功能的装置,所述装置包括:收发单元和处理单元;所述处理单元调用所述收发单元执行:接收切换指示信息,所述切换指示信息指示第一终端设备的第一会话待切换,所述第一会话是所述第一终端设备用于与第二终端设备通信的会话;向第一用户面网元发送第一指示信息,所述第一指示信息指示所述第一用户面网元向第二用户面网元发送第一信息,其中,所述第一信息用于所述第二用户面网元与所述第一用户面网元通信,所述第一用户面网元在所述第一会话切换后为所述第一终端设备服务,所述第二用户面网元为所述第二终端设备服务。
在一种可能的设计中,所述第一信息包括所述第一隧道的信息,所述第一隧道为所述第二用户面网元与所述第一用户面网元通信的隧道。
在一种可能的设计中,所述第一隧道的信息包含在第一透传容器中。
在一种可能的设计中,所述收发单元,用于向所述第一用户面网元发送所述第一信息。
第八方面,本申请提供一种通信装置,所述装置为第二用户面网元或用于实现第二用户面网元的功能的装置,所述装置包括:收发单元和处理单元;所述收发单元,用于从第一用户面网元接收第一信息,所述第一信息用于所述第二用户面网元与所述第一用户面网元通信;所述处理单元,用于根据所述第一信息更新路由规则,所述路由规则用于所述第二用户面网元向所述第一用户面网元转发数据,所述第一用户面网元为所述第一终端设备服务,所述第二用户面网元为所述第二终端设备服务。
在一种可能的设计中,所述第一信息包括第一隧道的信息,所述第一隧道为所述第二用户面网元与所述第一用户面网元通信的隧道。
在一种可能的设计中,所述第一隧道的信息包含在透传容器中。
第九方面,本申请提供一种通信装置,所述装置为会话管理网元或用于实现会话管理网元的功能的装置,所述装置包括:收发单元和处理单元;所述处理单元调用所述收发单元执行:接收第二切换指示信息,所述第二切换指示信息指示第二终端设备的第二会话待切换,其中,所述第二会话是所述第二终端设备用于与第一终端设备通信的会话;在接收所述第二切换指示信息之后,接收第一切换指示信息,所述第一切换指示信息指示第一终端设备的第一会话待切换,其中,所述第一会话为是所述第一终端设备用于与所述第二终端设备通信的会话;向第一源用户面网元发送第二指示信息,所述第二指示信息用于指示所述第一源用户面网元向第二目标用户面网元发送第二信息,向第二源用户面网元发送第三信息,其中,所述第二源用户面网元在所述第二会话切换前为所述第二终端设备服务,所述第二目标用户面网元在所述第二会话切换后为所述第二终端设备服务,所述第二信息用于所述第二目标用户面网元与第一目标用户面网元通信,所述第三信息用于所述第二源用户面网元与所述第一目标用户面网元通信,所述第一源用户面网元在所述第一会话切换前为所述第一终端设备服务,所述第一目标用户面网元在所述第一会话切换后为所述第一终端设备服务。
在一种可能的设计中,所述第二信息包括第二隧道的信息,所述第二隧道为所述第二目标用户面网元与所述第一目标用户面网元通信的隧道;所述第三信息包括第三隧道的信息,所述第三隧道为所述第二源用户面网元与所述第一目标用户面网元通信的隧道。
在一种可能的设计中,所述第二隧道的信息包含在第二透传容器中,所述第三隧道的
信息包含在第三透传容器中。
在一种可能的设计中,所述收发单元,用于向所述第一源用户面网元发送所述第二信息;和/或,所述收发单元,用于向所述第一源用户面网元发送所述第三信息。
第十方面,本申请提供一种通信装置,所述装置为第一源用户面网元或用于实现第一源用户面网元的功能的装置,所述装置包括:收发单元和处理单元;所述处理单元调用所述收发单元执行:从会话管理网元接收第二指示信息,所述第二指示信息用于指示所述第一源用户面网元向第二目标用户面网元发送第二信息,向第二源用户面网元发送第三信息,其中,所述第二源用户面网元和所述第二目标用户面网元为第二终端设备服务,所述第二信息用于所述第二目标用户面网元与第一目标用户面网元通信,所述第三信息用于所述第二源用户面网元与所述第一目标用户面网元通信,所述第一源用户面网元和所述第一目标用户面网元为所述第一终端设备服务;向所述第二目标用户面网元发送所述第二信息,向所述第二源用户面网元发送所述第三信息。
在一种可能的设计中,所述收发单元,用于从所述会话管理网元接收所述第二信息和/或所述第三信息。
在一种可能的设计中,所述第二信息包括第二隧道的信息,所述第二隧道为所述第二目标用户面网元与所述第一目标用户面网元通信的隧道;所述第三信息包括第三隧道的信息,所述第三隧道为所述第二源用户面网元与所述第一目标用户面网元通信的隧道。
在一种可能的设计中,所述第二隧道的信息包含在第二透传容器中,所述第三隧道的信息包含在第三透传容器中。
在一种可能的设计中,所述收发单元,用于在向第二目标用户面网元发送第二信息,向第二源用户面网元发送第三信息时,向所述第二目标用户面网元发送第二数据包,所述第二数据包包括所述第二信息,向所述第二源用户面网元发送第三数据包,所述第三数据包包括第三信息。
在一种可能的设计中,所述处理单元,用于在向所述第二目标用户面网元发送第二数据包前,构造所述第二数据包,所述第一数据包包含所述第二信息。
在一种可能的设计中,所述收发单元,用于在向所述第二目标用户面网元发送第二数据包前,在接收到所述第二指示信息之后接收到第一个需要发送给所述第二目标用户面网元的数据包;所述处理单元,用于在所述第一个需要发送给所述第二目标用户面网元的数据包中增加所述第二信息,将增加所述第二信息后的所述第一个需要发送给第二目标用户面网元的数据包作为第二数据包。
在一种可能的设计中,所述第三数据包为结束标记数据包。
第六方面至第十方面中任意一种可能的设计的技术效果可以参考上述第一方面至第五方面中相应设计的技术效果,重复之处不在赘述。
第十一方面,本申请还提供一种装置。该装置可以执行上述方法设计。该装置可以是能够执行上述方法对应的功能的芯片或电路,或者是包括该芯片或电路的设备。
在一种可能的实现方式中,该装置包括:存储器,用于存储计算机可执行程序代码;以及处理器,处理器与存储器耦合。其中存储器所存储的程序代码包括指令,当处理器执行所述指令时,使该装置或者安装有该装置的设备执行上述任意一种可能的设计中的方法。
其中,该装置还可以包括通信接口,该通信接口可以是收发器,或者,如果该装置为芯片或电路,则通信接口可以是该芯片的输入/输出接口,例如输入/输出管脚等。
在一种可能的设计中,该装置包括相应的功能单元,分别用于实现以上方法中的步骤。功能可以通过硬件实现,也可以通过硬件执行相应的软件实现。硬件或软件包括一个或多个与上述功能相对应的单元。
第十二方面,本申请提供一种计算机可读存储介质,所述计算机可读存储介质存储有计算机程序,当所述计算机程序在装置上运行时,执行上述任意一种可能的设计中的方法。
第十三方面,本申请提供一种计算机程序产品,所述计算机程序产品包括计算机程序,当所述计算机程序在装置上运行时,执行上述任意一种可能的设计中的方法。
图1为本申请应用的移动通信系统的架构示意图;
图2为本申请中UE1与UE2通过两个卫星进行通信的示意图;
图3为本申请中服务UE1的源S-gNB1发生切换和/或服务UE1的源S-gNB2发生切换的示意图;
图4为本申请中一种通信方法的概述流程图;
图5为本申请中另一种通信方法的概述流程图;
图6为本申请中在UE1和UE2不存在切换冲突的场景下更新隧道信息的具体流程图;
图7为本申请中在UE1和UE2存在切换冲突的场景下更新隧道信息的具体流程图之一;
图8为本申请中在UE1和UE2存在切换冲突的场景下更新隧道信息的具体流程图之二;
图9为本申请中一种通信装置的结构示意图之一;
图10为本申请中一种通信装置的结构示意图之二。
下面将结合本申请实施例中的附图,对本申请实施例中的技术方案进行清楚、完整地描述。显然,所描述的实施例仅仅是本申请一部分实施例,而不是全部的实施例。本申请的说明书和权利要求书及上述附图中的术语“第一”、第二”以及相应术语标号等是用于区别类似的对象,而不必用于描述特定的顺序或先后次序。应该理解这样使用的术语在适当情况下可以互换,这仅仅是描述本申请的实施例中对相同属性的对象在描述时所采用的区分方式。此外,术语“包括”和“具有”以及他们的任何变形,意图在于覆盖不排他的包含,以便包含一系列单元的过程、方法、系统、产品或设备不必限于那些单元,而是可包括没有清楚地列出的或对于这些过程、方法、产品或设备固有的其它单元。
在本申请的描述中,除非另有说明,“/”表示或的意思,例如,A/B可以表示A或B;本申请中的“和/或”仅仅是一种描述关联对象的关联关系,表示可以存在三种关系,例如,A和/或B,可以表示:单独存在A,同时存在A和B,单独存在B这三种情况。另外,在本申请的描述中,“至少一项”是指一项或者多项,“多项”是指两项或两项以上。“以下至少一项(个)”或其类似表达,是指的这些项中的任意组合,包括单项(个)或复数项(个)的任意组合。例如,a,b,或c中的至少一项(个),可以表示:a,b,c,a-b,a-c,b-c,或a-b-c,其中a,b,c可以是单个,也可以是多个。
如图1所示,第三代合作伙伴计划(3rd generation partnership project,3GPP)标准制定的5G的通信系统。该通信系统包括终端设备(例如,用户设备(user equipment,UE)),RAN,核心网(Core network,CN)。数据网络(data network,DN)在逻辑上,核心网的网元它们可以分为用户面和控制面两部分,控制面负责移动网络的管理,用户面负责业务数据的传输。
其中,终端设备是移动用户与网络交互的入口,能够提供基本的计算能力,存储能力,向用户显示业务窗口,接收用户操作输入。下一代终端设备(NextGen UE)可以采用新空口技术,与RAN建立信号连接,数据连接,从而传输控制信号和业务数据到移动网络。终端设备可以包括各种具有无线通信功能的手持设备、车载设备、可穿戴设备、计算设备或连接到无线调制解调器的其它处理设备,以及各种形式的终端,移动台(mobile station,MS),终端(terminal),软终端等等,例如水表、电表、传感器等。
RAN:部署在靠近终端设备的位置,为特定区域的授权用户提供入网功能,并能够根据用户的级别,业务的需求等确定不同质量的传输隧道来传输用户数据。RAN能够管理自身的资源,合理利用,按需为终端设备提供接入服务,并负责把控制信号和用户数据在终端设备和核心网之间转发。
核心网:负责维护移动网络的签约数据,管理移动网络的网元,为终端设备提供会话管理,移动性管理,策略管理,安全认证等功能。在终端设备附着的时候,为终端设备提供入网认证;在终端设备有业务请求时,为终端设备分配网络资源;在终端设备移动的时候,为终端设备更新网络资源;在终端设备空闲的时候,为终端设备提供快恢复机制;在终端设备去附着的时候,为终端设备释放网络资源;在终端设备有业务数据时,为终端设备提供数据路由功能,如转发上行数据到数据网络;或者从数据网络接收终端设备的下行数据,转发到RAN,从而由RAN发送给终端设备。
数据网络(data network,DN):为用户提供业务服务的数据网络,一般客户端位于终端设备,服务端位于数据网络。数据网络可以是私有网络,如局域网,也可以是不受运营商管控的外部网络,例如互联网(Internet),还可以是运营商共同部署的专有网络,例如提供IP多媒体网络子系统(IP multimedia core network subsystem,IMS)服务的网络。
其中,核心网用户面包括UPF;核心网控制面包括接入和移动性管理功能(access and mobility management function,AMF),会话管理功能(session management function,SMF),网络开放功能(network exposure function,NEF),网络功能仓储功能(NF repository function,NRF),统一数据管理(unified data management,UDM),网络切片选择功能(network slice selection function,NSSF),认证服务器功能(authentication server function,AUSF),策略控制功能(policy control function,PCF),应用功能(application function,AF)。
核心网控制面采用服务化架构,控制面网元之间的交互采用服务调用的方式,来替换传统架构中的点对点通信方式。在服务化架构中,控制面网元会向其他控制面网元开放服务,供其他控制面网元调用;在点对点通信中,控制面网元之间通信接口会存储一套特定的消息,只能由接口两端的控制面网元在通信时使用。
以下对核心网中的功能实体的功能进行简单介绍:
1、会话管理网元:主要用于会话管理、终端设备的IP地址分配和管理、选择可管理用户设备平面功能、策略控制、或收费功能接口的终结点以及下行数据通知等。在5G通信中,会话管理网元可以是SMF网元,在未来通信如6G通信中,会话管理网元仍可以是
SMF网元,或者有其它名称,本申请对此不作限定。Nsmf是SMF提供的基于服务的接口,SMF可以通过Nsmf与其他的网络功能通信。
2、接入管理网元:主要用于移动性管理和接入管理等,例如可以是4G通信网络中的移动性管理实体(mobility management entity,MME)功能或者5G网络中的AMF网元。在未来通信如6G通信中,接入管理网元仍可以是AMF网元,或者有其它名称,本申请对此不作限定。Namf是AMF提供的基于服务的接口,AMF可以通过Namf与其他的网络功能通信。
3、网络开放网元:用于安全地向外部开放由3GPP网络功能提供的业务和能力等。在5G通信中,网络开放网元可以是NEF网元,在未来通信如6G通信中,网络开放功能网元仍可以是NEF网元,或者有其它名称,本申请对此不作限定。其中Nnef是NEF提供的基于服务的接口,NEF可以通过Nnef与其他的网络功能通信。
4、网络存储网元:用于提供服务注册、发现和授权,并维护可用的网络功能(network function,NF)实例信息,可以实现网络功能和服务的按需配置以及NF之间的互连。在5G通信中,网络存储网元可以是NRF网元,在未来通信如6G通信中,网络存储功能网元仍可以是NRF网元,或者有其它名称,本申请对此不作限定。Nnrf是NRF提供的基于服务的接口,NRF可以通过Nnrf与其他的网络功能通信。
5、策略控制网元:用于指导网络行为的统一策略框架,为控制平面功能网元(例如AMF,SMF等)提供策略规则信息等。在5G通信中,策略控制网元可以是PCF网元,在未来通信如6G通信中,策略控制网元仍可以是PCF网元,或者有其它名称,本申请对此不作限定。其中Npcf是PCF提供的基于服务的接口,PCF可以通过Npcf与其他的网络功能通信。
6、数据管理网元:用于处理用户标识、签约、接入鉴权、注册、或移动性管理等。在5G通信中,数据管理网元可以是UDM网元,在未来通信如6G通信中,数据管理网元仍可以是UDM网元,或者有其它名称,本申请对此不作限定。其中Nudm是UDM提供的基于服务的接口,UDM可以通过Nudm与其他的网络功能通信。
7、数据存储网元:用于执行签约数据、策略数据、应用数据等类型数据的存取功能。在5G通信中,数据存储网元可以是UDR网元,在未来通信如6G通信中,数据存储网元仍可以是UDR网元,或者有其它名称,本申请对此不作限定。其中Nudr是UDR提供的基于服务的接口,UDR可以通过Nudr与其他的网络功能通信。
8、应用网元:用于进行应用影响的数据路由,接入网络开放功能,或与策略框架交互进行策略控制等。在5G通信中,应用网元可以是AF网元,在未来通信如6G通信中,应用网元仍可以是AF网元,或者有其它名称,本申请对此不作限定。Naf是AF提供的基于服务的接口,AF可以通过Naf与其他的网络功能通信。
9、用户面网元:用于分组路由和转发、或用户面数据的服务质量(quality of service,QoS)处理等。在5G通信中,用户面网元可以是用户面功能(user plane function,UPF)网元,在未来通信如6G通信中,用户面网元仍可以是UPF网元,或者有其它名称,本申请对此不作限定。
10、认证服务网元:主要用于用户鉴权等。在5G通信中,认证服务网元可以是AUSF网元,在未来通信如6G通信中,认证服务网元仍可以是AUSF网元,或者有其它名称,本申请对此不作限定。Nausf是AUSF提供的基于服务的接口,AUSF可以通过Nausf与其
他的网络功能通信。
11、网络切片选择功能网元:用于为终端设备选择网络切片,在5G通信中,网络切片选择功能网元可以是NSSF网元,在未来通信如6G通信中,网络切片选择功能网元仍可以是NSSF网元,或者有其它名称,本申请对此不作限定。
可以理解的是,核心网还可以包括其他网元,本申请对此不作限定。
本申请实施例提供的技术方案可以应用于各种通信系统。例如:可以适用于LTE系统或5G系统,也可以适用于其它面向未来的新系统等。本申请实施例对此不作具体限定。此外,术语“系统”可以和“网络”相互替换。
如图2所示为UE1与UE2通过两个卫星进行通信的示意图。其中,S-gNB1为UE1提供服务,S-gNB1与S-UPF1部署在一个卫星上,S-gNB2为UE2提供服务,S-gNB2与S-UPF2部署在一个卫星上,为了支持UE1与UE2之间通信,S-UPF1与S-UPF2之间需要建立隧道。示例性地,该隧道可以为Nx隧道,地面上的核心网设备(例如会话管理功能(session management function,SMF))为S-UPF1与S-UPF2分别配置Nx隧道信息。具体的,为S-UPF1配置S-UPF2的Nx隧道信息(例如SMF向S-UPF1提供转发动作规则(Forwarding Action Rule,FAR)),S-UPF1可以根据S-UPF2的Nx隧道信息向S-UPF2发送UE1向UE2发送的数据。同理,为S-UPF2配置S-UPF1的Nx隧道信息,S-UPF2可以根据S-UPF1的Nx隧道信息向S-UPF1发送UE2向UE1发送的数据。
基于上述图2,当服务UE2的UPF发生变更(即由源S-UPF2变为目标S-UPF2)时,需要更新相应对端配置的Nx隧道信息。
如图3所示,以下分别以服务UE1的源S-gNB1发生切换和/或服务UE2的源S-gNB2发生切换为例说明更新Nx隧道信息的具体过程。
场景1:
当UE1从源S-gNB1切换到目标S-gNB1时,SMF接收到来自于AMF的切换指示信息。其中,目标S-gNB1与目标S-UPF1部署在卫星3上。在收到切换指示信息后,SMF确定服务UE1的UPF需要从源S-UPF1变更为目标S-UPF1。部署在卫星上的网元(例如目标S-UPF1和源S-UPF2)需要与部署在地面上的网元(例如SMF)进行多次交互,以实现将UE1对应的目标S-UPF1的Nx隧道信息更新到源S-UPF2,以及将UE2对应的源S-UPF2的Nx隧道信息更新到目标S-UPF1,进而确保UE1与UE2之间的正常通信。
可以理解的是,服务UE2的UPF发生变更与服务UE1的UPF发生变更类似,此处不再赘述。
其中,场景1又可描述为UE1和UE2之间没有切换冲突的场景,即UE1或UE2切换接入的gNB。
场景2:
当UE1从源S-gNB1切换到目标S-gNB1,UE2从源S-gNB2切换到目标S-gNB2时,SMF接收UE1相关的切换指示信息,SMF还接收到UE2相关的切换指示信息。其中,目标S-gNB1与目标S-UPF1部署在卫星3上。目标S-gNB2与目标S-UPF2部署在卫星4上。可以理解的是,SMF可以先接收UE1相关的切换指示信息,然后接收UE2相关的切换指示信息,或者SMF可以先接收到UE2相关的切换指示信息,然后接收到UE1相关的切换指示信息。此时,部署在卫星上的网元(例如源S-UPF1、目标S-UPF1、源S-UPF2和目标S-UPF2)与部署在地面上的网元(例如SMF)需要进行多次交互,以实现将UE1对应
的目标S-UPF1的Nx隧道信息更新到源S-UPF2和目标S-UPF2,以及将UE2对应的目标S-UPF2的Nx隧道信息更新到源S-UPF1和目标S-UPF1,以确保UE1与UE2之间的正常通信。
其中,场景2又可描述为UE1和UE2之间存在切换冲突的场景,即UE1和UE2均切换接入的gNB。
可以理解的是,基于上述两种场景可知,当部署在卫星上的网元与部署在地面上的网元需要进行多次交互时,将会导致UE1和/或UE2的切换过程的时延较长。
基于上述问题,本申请提供一种通信方法,用以实现减少部署在地面上的网元与部署在卫星上的网元之间交互的来回,实现缩短UE的切换过程的时延。如图4所示,以下仅以第一终端设备切换接入的接入网设备,而第二终端设备不切换接入的接入网设备为例进行说明,对应上述场景1。
该方法包括:
步骤400:会话管理网元接收切换指示信息,切换指示信息指示第一终端设备的第一会话待切换,第一会话是为第一终端设备建立的用于与第二终端设备通信的会话。
示例性地,会话管理网元从接入管理网元接收切换指示信息。
步骤410:会话管理网元向第一用户面网元发送第一指示信息,第一指示信息指示第一用户面网元向第二用户面网元发送第一信息,其中,第一信息用于第二用户面网元与第一用户面网元通信,第一用户面网元在第一会话切换后为第一终端设备服务,第二用户面网元为第二终端设备服务。
在一种可能的实现方式中,第一指示信息还可以指示第一用户面网元向第二用户面网元发送第一数据包,第一数据包包含第一信息。第一用户面网元可以根据第一指示信息构造第一数据包,并向第二用户面网元发送第一数据包。或者,根据第一指示信息在接收到的第一个发送给第二用户面网元的数据包内添加第一信息,添加了第一信息后的数据包成为第一数据包,并向第二用户面网元发送第一数据包。或者,第一用户面网元可以根据第一指示信息通过其它方式获得第一数据包(例如,会话管理网元向第一用户面网元提供第一数据包),并向第二用户面网元发送第一数据包。
在另一种可能的实现方式中,第一指示信息还可以指示第一用户面网元构造第一数据包,第一数据包包括第一信息。进而,第一用户面网元可以根据第一指示信息构造第一数据包,第一数据包包括第一信息。
在另一种可能的实现方式中,第一指示信息还可以指示第一用户面网元在接收到所述第一指示信息后,在接收到的第一个发送给第二用户面网元的数据包内添加第一信息。此时,第一用户面网元在接收到该数据包后,在该数据包内添加第一信息。添加了第一信息后的数据包成为第一数据包。
步骤420:第一用户面网元向第二用户面网元发送第一信息。
示例性地,第一用户面网元可以通过以下两种方式获得第一信息:
在第一种可能的实现方式中,在接收切换指示信息之后,会话管理网元为第一用户面网元分配第一隧道,并向第一用户面网元发送会话更新请求消息,会话更新请求消息包含第一信息。在一种实现方式中,在步骤410中发送会话更新请求消息,可以理解为会话更新请求消息中既包含第一指示信息,又包含第一信息。其中,第一隧道为第二用户面网元与第一用户面网元通信的隧道,即第二用户面网元可以通过第一用户面网元的第一隧道向
第一用户面网元发送数据。第一信息包括第一隧道的信息,或者第一信息即为第一隧道的信息。示例性地,第一隧道的信息可以包括隧道端点标识(tunnel endpoint identifier,TEID)。第一隧道的信息可以包含在透传容器中。例如,第一信息包括透传容器,该透传容器为N4容器,N4容器是会话管理网元发送给第二用户面网元的,第一用户面网元仅负责透传。N4容器包含N4会话更新请求消息,N4会话更新请求消息包含一个或多个规则。例如,N4会话更新请求消息可以包含转发动作规则(Forwarding Action Rule,FAR),FAR包含会话标识、规则标识、动作、网络实例、目的接口、出口指向(Outer header creation)等属性,其中,出口指向属性中包含第一隧道的信息(例如TEID)等。需要说明的是,控制面网元与用户面网元之间一般使用包转发控制协议(Packet Forwarding Control Protocol,PFCP),申请书仅以N4接口为例说明,例如上述N4容器可以理解为一种PFCP容器,N4会话可以理解为一种PFCP会话。
在第二种可能的实现方式中,在接收切换指示信息之后,会话管理网元向第一用户面网元发送会话更新请求消息,该会话更新请求消息请求第一用户面网元分配第一隧道。第一用户面网元根据请求消息分配第一隧道,根据第一隧道的信息确定第一信息,第一信息包括第一隧道的信息,或者第一信息即为第一隧道的信息。此外,第一用户面网元还向会话管理网元发送响应消息,该响应消息包括第一隧道的信息。或者,会话管理网元在接收到第一隧道的信息后,根据第一隧道的信息确定第一信息,并向第一用户面网元发送第一信息,第一信息同第一种可能的实现方式。
示例性地,第一用户面网元向第二用户面网元发送第一信息,包括:第一用户面网元向第二用户面网元发送第一数据包,第一数据包包括第一信息。第一数据包的获取方式见步骤410。
进一步地,在一些实施例中,会话管理网元没有向第一用户面网元发送第一指示信息,即步骤410中会话管理网元没有提供第一指示信息,会话管理网元仅向第一用户面网元提供第一信息,则第一用户面网元在接收第一信息后向第二用户面网元发送第一信息。
步骤430:第二用户面网元从第一用户面网元接收第一信息,根据第一信息更新路由规则,该路由规则用于第二用户面网元向第一用户面网元转发数据。
在一种可能的设计中,第一信息包括包含第一隧道的信息的透传容器。第二用户面网元根据包含第一隧道的信息的透传容器中的会话更新请求消息更新相应的路由规则。
在一种可能的设计中,第一信息包括第一隧道的信息。第二用户面网元根据第一隧道的信息更新相应的路由规则。此时,第二用户面网元具有根据第一隧道的信息更新相应的路由规则的能力,或者第二用户面网元从会话管理网元接收配置信息,配置信息用于第二用户面网元根据第一隧道的信息更新相应的路由规则。
采用上述方法,会话管理网元将需要发送给第二用户面网元的第一信息,通过第一用户面网元发送给第二用户面网元,减少了会话管理网元与第二用户面网元的交互。
基于上述问题,本申请还提供另一种通信方法,用以实现减少部署在地面上的网元与部署在卫星上的网元之间的交互,实现缩短UE的切换过程的时延。如图5所示,以下仅以第一终端设备切换接入的接入网设备,且第二终端设备先于第一终端设备切换接入的接入网设备为例进行说明,对应上述场景2。
该方法包括:
步骤500:会话管理网元接收第二切换指示信息,第二切换指示信息指示第二终端设
备的第二会话待切换,其中,第二会话是第二终端设备的用于与第一终端设备通信的会话。
示例性地,会话管理网元从接入管理网元接收第二切换指示信息。
步骤510:会话管理网元在接收第二切换指示信息之后,接收第一切换指示信息,第一切换指示信息指示第一终端设备的第一会话待切换,其中,第一会话为是第一终端设备的用于与第二终端设备通信的会话。
示例性地,会话管理网元从接入管理网元接收第一切换指示信息。
步骤520:会话管理网元向第一源用户面网元发送第二指示信息,第二指示信息用于指示第一源用户面网元向第二目标用户面网元发送第二信息,向第二源用户面网元发送第三信息,其中,第二源用户面网元在第二会话切换前为第二终端设备服务,第二目标用户面网元在第二会话切换后为第二终端设备服务,第二信息用于第二目标用户面网元与第一目标用户面网元通信,第三信息用于第二源用户面网元与第一目标用户面网元通信,第一源用户面网元在第一会话切换前为第一终端设备服务,第一目标用户面网元在第一会话切换后为第一终端设备服务。
示例性地,在接收到第一切换指示信息之后,会话管理网元分配第二隧道,第二隧道为第二目标用户面网元与第一目标用户面网元通信的隧道,向第一源用户面网元发送第二信息。第二信息包括第二隧道的信息。
在接收到第一切换指示信息之后,会话管理网元还分配第三隧道,根据第三隧道的信息获得第三信息,第三隧道为第二源用户面网元与第一目标用户面网元通信的隧道,向第一源用户面网元发送第三信息。第三信息包括第三隧道的信息。
在另一种实现方式中,在接收到第一切换指示信息之后,会话管理网元请求第一目标用户面网元分配第二隧道和/或第三隧道。和步骤420中的第二种可能的实现方式类似,会话管理网元或者第一目标用户面网元确定第二信息和/或第三信息。若会话管理网元确定第二信息和/或第三信息,则向第一源用户面网元发送第二信息和/或第三信息。
可选的,第二信息和/或第三信息包含的内容和步骤420中描述的类似,即直接包含第二隧道的信息和/或第三隧道的信息,或者包含第二透传容器和/或第三透传容器。
需要说明的是,第二隧道和第三隧道可以是同一隧道,即会话管理网元或第一目标用户面网元仅分配一次。在这种情况下,第二隧道即为第三隧道,第二隧道的信息即为第三隧道的信息。若第二信息仅包含第二隧道的信息,第三信息仅包含第三隧道的信息,则第二信息即为第三信息,包含第二隧道的信息,或者即为第二隧道的信息。
在一种可能的实现方式中,第二指示信息还可以指示第一源用户面网元向第二目标用户面网元发送第二数据包,向第二源用户面网元发送第三数据包,第二数据包包含第二信息,第三数据包包含第三信息。
在另一种可能的实现方式中,第二指示信息还可以指示第一源用户面网元构造第二数据包和第三数据包。
在另一种可能的实现方式中,第二指示信息还可以指示第一源用户面网元在接收到所述第二指示信息后,在接收到的第一个发送给第二目标用户面网元的数据包内添加第二信息,在接收到的第一个发送给第二源用户面网元的数据包内添加第三信息。添加了第二信息后的第一个发送给第二目标用户面网元的数据包成为第二数据包,添加了第三信息后的第一个发送给第二源用户面网元的数据包成为第三数据包。
在另一种可能的实现方式中,第二指示信息还可以指示第一源用户面网元在接收到所
述第二指示信息后,在发送给第二目标用户面网元的结束标记数据包内添加第二信息,在发送给第二源用户面网元的结束标记数据包内添加第三信息。添加了第二信息后的发送给第二目标用户面网元的结束标记数据包成为第二数据包,添加了第三信息后的发送给第二源用户面网元的结束标记数据包成为第三数据包。
步骤530:第一源用户面网元向第二目标用户面网元发送第二信息。
示例性地,第一源用户面网元向第二目标用户面网元发送第二数据包,第二数据包包括第二信息。
在一种可能的实现方式中,第二数据包为第一源用户面网元在接收到第二指示信息之后向第二目标用户面网元发送的第一个数据包中增加第二信息构成的数据包,或者第二数据包为第一源用户面网元构造的数据包。
步骤540:第一源用户面网元向第二源用户面网元发送第三信息。
示例性地,第一源用户面网元向第二源用户面网元发送第三数据包,第三数据包包括第三信息。例如,第三数据包为上述结束标记数据包(Endmarker数据包)。
此外,在一些实施例中,当第三数据包为结束标记数据包时,结束标记数据包还可以包括第二信息,此时,第二源用户面网元将接收到的结束标记数据包发送至第二源接入网设备,第二源接入网设备再将其发送至第二目标接入网设备,第二目标接入网设备将其发送至第二目标用户面网元。此时,不需要执行步骤530。其中,第二源接入网设备为切换前服务第二终端设备的接入网设备,第二目标接入网设备为切换后服务第二终端设备的接入网设备。
需要说明的是,在一些实施例中,无论会话管理网元是否向第一源用户面网元发送第二指示信息,在第一源用户面网元从会话管理网元接收第二信息和第三信息时,第一源用户面网元向第二目标用户面网元发送第二信息,向第二源用户面网元发送第三信息。
可以理解的是,这里不限定步骤530和步骤540的先后顺序。
步骤550:第二目标用户面网元从第一源用户面网元接收第二信息,根据第二信息更新相应的路由规则。具体可以参考上述步骤430。
步骤560:第二源用户面网元从第一源用户面网元接收第三信息,根据第三信息更新相应的路由规则。具体可以参考上述步骤430。
可以理解的是,这里不限定步骤550和步骤560的先后顺序。
采用上述方法,会话管理网元将需要发送给第二目标用户面网元的第二信息和第二源用户面网元的第三信息,通过第一源用户面网元发送,减少了会话管理网元与第二目标用户面网元和第二源用户面网元的交互。
对于下述实施例一,源RAN1和源UPF1位于同一卫星(记为卫星1),目标RAN1和目标UPF1位于同一卫星(记为卫星2),RAN2和UPF2位于同一卫星(记为卫星3)。其中,卫星1至卫星3互不相同。
实施例一
本实施例应用于UE1和UE2之间没有切换冲突的场景,对应上述场景1。具体的,该场景可以理解为:SMF接收到UE1侧发送的切换指示,未接收到UE2侧发送的切换指示。或者,SMF接收到UE2侧发送的切换指示,未接收到UE1侧发送的切换指示。以下仅以SMF接收到UE1侧发送的切换指示,未接收到UE2侧发送的切换指示为例进行说明如何更新服务UE2的UPF2的隧道信息,如图6所示。
步骤1.源RAN1向目标RAN1发送切换请求消息。
步骤2.目标RAN1向源RAN1发送切换请求确认消息。
步骤3.源RAN1向UE1发送RRC重配置(RRC Reconfiguration)消息,触发Uu切换,RRC重配置消息包含接入目标RAN需要的信息。
步骤4.源RAN1向目标RAN1发送状态传输(Status transfer)消息,状态传输消息用于同步数据包的序列号等。
步骤5.UE1向目标RAN1发送RRC重配置完成(RRC Reconfiguration complete)消息,至此完成RRC切换流程。
步骤1至步骤5为UE1从源RAN1切换到目标RAN1的过程。这里的切换过程又可以称为RRC切换。上述过程仅切换RAN相关的路径,而UPF相关的路径未切换(即依然使用源UPF1进行数据的传输)。
其中,在RRC切换之前,UE1向UE2发数据的路径是UE1->源RAN1->源
UPF1->UPF2->RAN2->UE2,UE2向UE1发数据的路径是UE2->RAN2->UPF2->源UPF1->源RAN1->UE1。在RRC切换之后,UE1向UE2发数据的路径是UE1->目标RAN1->源UPF1->UPF2->RAN2->UE2,UE2向UE1发数据的路径是UE2->RAN2->UPF2->源UPF1->目标RAN1->UE1。
步骤6.目标RAN1向AMF发送路径切换(N2Path Switch)请求消息,路径切换请求消息包含第一会话的信息。其中,第一会话为UE1待切换的会话,第一会话是UE1的用于与UE2通信的会话。
步骤7.AMF向SMF发送会话管理上下文更新(SM Context Update for UE1)请求消息,会话管理上下文更新请求消息包含切换指示信息,切换指示信息指示第一会话待切换。
可选的,在步骤6,目标RAN1还向AMF发送目标RAN1分配的AN N3隧道信息。AN N3隧道用于目标UPF1向目标RAN1发送数据。在步骤7中,AMF还向SMF发送接入网络(access network,AN)N3隧道信息。
步骤8.SMF向目标UPF1发送N4会话建立(N4establishment)请求消息。
SMF确定服务第一会话的UPF需要切换,选择目标UPF1为第一会话服务,并向目标UPF1发送N4会话建立请求消息。
示例性地,SMF根据切换指示信息获知RAN发生切换,然后进一步判断是否需要切换UPF。例如,SMF可以根据UPF和RAN的部署情况、星历等确定是否需要切换UPF,并在确定切换UPF时,根据上述信息选择目标UPF1。
在第一种可能的实现方式中,SMF为目标UPF1分配隧道,隧道是指服务UE1的目标UPF1与服务UE2的UPF2通信的隧道。N4会话建立请求消息包括UPF2的隧道信息和目标UPF1的隧道信息。其中,UPF2的隧道信息用于目标UPF1向UPF2发送UE1向UE2发送的数据,目标UPF1的隧道信息用于UPF2向目标UPF1发送UE1向UE2发送的数据。
在第二种可能的实现方式中,N4会话建立请求消息包括UPF2的隧道信息和包含目标UPF1的隧道信息的N4容器。
在第三种可能的实现方式中,N4会话建立请求消息请求目标UPF1分配隧道,此外,N4会话建立请求消息还包括UPF2的隧道信息。
结合上述三种可能的实现方式,SMF还可以向目标UPF1发送第一指示信息,第一指示信息指示目标UPF1向UPF2发送第一信息。
此外,第一指示信息还可以指示其他内容,具体可以参考步骤410中的相关描述。
步骤9.目标UPF1向SMF发送N4会话建立响应消息。
对于第三种可能的实现方式,目标UPF1根据N4会话建立请求消息分配隧道,N4会话建立响应消息包括目标UPF1的隧道信息。
此外,SMF在接收到目标UPF1的隧道信息之后,还可以通过其它方式向目标UPF1发送包含目标UPF1的隧道信息的N4容器,包含目标UPF1的隧道信息的N4容器由目标UPF1透传给UPF2,包含目标UPF1的隧道信息的N4容器包括SMF发送给UPF2的N4会话更新请求消息,N4会话更新请求消息包括目标UPF1的隧道信息。
示例性地,SMF在步骤10中包含包含目标UPF1的隧道信息的N4容器,在步骤11中由AMF将其透传给目标RAN1,目标RAN1收到包含目标UPF1的隧道信息的N4容器后将其发送给目标UPF1。
可选的,在步骤8中,在SMF向目标UPF1发送消息时,还可以携带AN N3隧道信息。此外,SMF还分配CN N3隧道,CN N3隧道用于目标RAN1向目标UPF1发送数据。
步骤10.SMF向AMF发送会话管理上下文更新响应消息,会话管理上下文更新响应消息用于确认会话管理上下文更新请求消息。
此外,可选的,在步骤10之后,SMF还与源UPF1交互,释放UE1的上下文。
步骤11.AMF向目标RAN1发送路径切换响应消息,路径切换响应消息确认已完成路径切换。
其中,UE1向UE2发数据的路径是UE1->目标RAN1->目标UPF1->UPF2->RAN2->UE2,UE2向UE1发数据的路径不变。
可选的,在步骤10和11中,SMF还向目标RAN1发送CN N3隧道信息。
步骤12.目标UPF1向UPF2发送第一信息。
示例的,目标UPF1向UPF2发送数据包,数据包包含第一信息。
可以理解的是,目标UPF1根据UPF2的隧道信息向UPF2发送数据包。
示例性地,当目标UPF1未接收到包含目标UPF1的隧道信息的N4容器时,数据包包含目标UPF1的隧道信息。当目标UPF1接收到包含目标UPF1的隧道信息的N4容器时,数据包包含包含目标UPF1的隧道信息的N4容器。
示例性地,目标UPF1可以采用但不限于下述方式1和方式2向UPF2发送数据包。
方式1:目标UPF1直接构造数据包,目标UPF1向UPF2发送构造的数据包。其中,构造的数据包包括目标UPF1的隧道信息或包含目标UPF1的隧道信息的N4容器。
方式2:在目标UPF1接收到第一指示信息之后,目标UPF1在向UPF2发送的第一个数据包中添加目标UPF1的隧道信息或包含目标UPF1的隧道信息的N4容器。目标UPF1向UPF2发送该数据包。
可以理解的是,目标UPF1可以通过本地配置,或通过SMF发送的指示信息确定采用上述方式1或方式2。
步骤13.在接收到来自目标UPF1的第一信息后,UPF2根据第一信息更新路由规则。其中,所述路由规则用于UPF2向目标UPF1转发数据。
在第一种可能的实现方式中,UPF2接收到包含目标UPF1的隧道信息的N4容器,直接根据包含目标UPF1的隧道信息的N4容器更新路由规则。
在第二种可能的实现方式中,UPF2接收到目标UPF1的隧道信息,UPF2根据目标UPF1的隧道信息更新路由规则。在这种实现方式中,UPF2具备根据隧道信息更新路由规则的能力。
在第三种可能的实现方式中,UPF2根据目标UPF1的隧道信息和配置信息更新路由规则。其中,配置信息用于UPF2根据目标UPF1的隧道信息更新路由规则。该配置信息可以由SMF发送给UPF2,此处不限定发送配置信息的具体时机。
在UPF2更新路由规则之后,UE2向UE1发数据的路径是:
UE2->RAN2->UPF2->目标UPF1->目标RAN1->UE1。
此外,在步骤12之后,UPF2还可以向源UPF1发送结束标记数据包。源UPF1将该结束标记数据包发送至源RAN1,源RAN1将该结束标记数据包发送至目标RAN1。在此之后,UE2向UE1发数据的路径为UPF2更新路由规则之后UE2向UE1发数据的路径。
因此,对于UE1和UE2没有切换冲突的场景,采用上述实施例,可以减少SMF和UPF2的一次交互的来回,实现缩短UE1的切换过程的时延。
对于下述实施例二和实施例三,源RAN1和源UPF1位于同一卫星(记为卫星1),目标RAN1和目标UPF1位于同一卫星(记为卫星2),源RAN2和源UPF2位于同一卫星(记为卫星3),目标RAN2和目标UPF2位于同一卫星(记为卫星4)。其中,卫星1至卫星4互不相同。
实施例二
本实施例应用于UE1和UE2存在切换冲突的场景,对应上述场景2。具体的,该场景可以理解为:SMF收到UE1侧发送的切换指示时,已收到UE2侧发送的切换指示,或者,SMF收到UE2侧发送的切换指示时,已收到UE1侧发送的切换指示。以下仅以SMF收到UE1侧发送的切换指示时,已收到UE2侧发送的切换指示为例进行说明如何更新服务UE2的源UPF2的隧道信息,以及如何更新服务UE2的目标UPF2的隧道信息,如图7所示。
UE2从源RAN2切换到目标RAN2的过程可以参考UE1从源RAN1切换到目标RAN1的过程(即步骤1至步骤5),步骤1至步骤5具体可以参考实施例一中的步骤1至步骤5,此处不再赘述。
步骤6.目标RAN2向AMF发送路径切换请求消息,路径切换请求消息包含第二会话的信息。其中,第二会话为UE2待切换的会话,第二会话是为UE2建立的用于与UE1通信的会话。
步骤7.AMF向SMF发送会话管理上下文更新请求消息,会话管理上下文更新请求消息包含切换指示信息,切换指示信息指示第二会话待切换。
步骤8.目标RAN1向AMF发送路径切换请求消息,路径切换请求消息包含第一会话的信息。其中,第一会话为UE1待切换的会话,第一会话是为UE1建立的用于与UE2通信的会话。
步骤9.SMF向目标UPF2发送N4会话建立请求消息。
示例性地,SMF根据步骤7确定服务第二会话的UPF需要切换,选择目标UPF2为第二会话服务,并向目标UPF2发送N4会话建立请求消息。SMF分配目标UPF2的隧道。该隧道是指服务UE1的源UPF1与服务UE2的目标UPF2通信的隧道。其中,目标UPF2的隧道信息用于源UPF1向目标UPF2发送数据。
其中,N4会话建立请求消息包括源UPF1的隧道信息,源UPF1的隧道信息用于目标UPF2向源UPF1发送数据。
步骤10.目标UPF2向SMF发送N4会话建立响应消息。
步骤11.AMF向SMF发送会话管理上下文更新请求消息,会话管理上下文更新请求消息包含切换指示信息,切换指示信息指示第一会话待切换。
步骤12.SMF向目标UPF1发送N4会话建立请求消息。
SMF确定服务第一会话的UPF需要切换,选择目标UPF1为第一会话服务,并向目标UPF1发送N4会话建立请求消息。SMF分配目标UPF1的隧道。该隧道是指服务UE2的源UPF2与服务UE1的目标UPF1通信的隧道,也是服务UE2的目标UPF2与服务UE1的目标UPF1通信的隧道。
可选的,N4会话建立请求消息包含目标UPF1的隧道信息。
可选的,N4会话建立请求消息还包括目标UPF2的隧道信息和源UPF2的隧道信息。
步骤13.目标UPF1向SMF发送N4会话建立响应消息。
步骤14.SMF向源UPF1发送N4会话更新请求消息。
在第一种实现方式中,N4会话更新请求消息包含目标UPF1的隧道信息。
在第二种实现方式中,N4会话更新请求消息包含包含目标UPF1的隧道信息的N4容器1和包含目标UPF1的隧道信息的N4容器2。其中,N4容器1包含SMF发送给目标UPF2的N4会话更新请求消息,该N4会话更新请求消息包含目标UPF1的隧道信息,N4容器2包含SMF发送给源UPF2的N4会话更新请求消息,该N4会话更新请求消息包含目标UPF1的隧道信息。
此外,SMF还向源UPF1发送目标UPF2的隧道信息。
在一些实施例中,N4会话建立响应消息还包括第二指示信息,第二指示信息用于指示源UPF1向目标UPF2发送第二信息,向源UPF2发送第三信息,第二信息用于为目标UPF2与目标UPF1通信,第三信息用于为源UPF2与目标UPF1通信。第二信息包括目标UPF1的隧道信息或者包含目标UPF1的隧道信息的N4容器1,第三信息包括目标UPF1的隧道信息或者包含目标UPF1的隧道信息的N4容器2。
此外,第二指示信息还可以指示其他内容,具体可以参考步骤520中的相关描述。
步骤15.源UPF1向SMF发送N4会话更新响应消息。
步骤16.源UPF1向源UPF2发送第三信息。
示例的,源UPF1向源UPF2发送数据包,数据包包括第三信息。示例性地,对于源UPF1未收到包含目标UPF1的隧道信息的N4容器2的方案,数据包中包含目标UPF1的隧道信息。对于源UPF1收到N4容器2的方案,数据包中包含包含目标UPF1的隧道信息的N4容器2。
在第一种实现方式中,源UPF1向源UPF2发送结束标记数据包,所述结束标记数据包用于同步数据包的顺序,即通知源RAN2停止发送数据包,通知目标RAN2开始发送数据包。在这种实现方式中,源UPF1向源UPF2发送结束标记数据包,源UPF2将结束标记数据包转发给源RAN2,源RAN2将结束标记数据包发送给目标RAN2。
数据包还包括第二信息。示例性地,对于源UPF1未接收到包含目标UPF1的隧道信息的N4容器1和包含目标UPF1的隧道信息的N4容器2的方案,数据包中包含目标UPF1的隧道信息。此时,目标RAN2收到结束标记数据包后,将目标UPF1的隧道信息发送给
目标UPF2。对于源UPF1接收到包含目标UPF1的隧道信息的N4容器1和包含目标UPF1的隧道信息的N4容器2的方案,数据包中包含包含目标UPF1的隧道信息的N4容器1和包含目标UPF1的隧道信息的N4容器2。此时,目标RAN2收到结束标记数据包后,将包含目标UPF1的隧道信息的N4容器1发送给目标UPF2。因此,不需要执行步骤18,直接执行步骤19。
在第二种实现方式中,源UPF1构造数据包,并将数据包发送给源UPF2。对于源UPF1未收到包含目标UPF1的隧道信息的N4容器2的方案,数据包中包含目标UPF1的隧道信息。对于源UPF1收到包含目标UPF1的隧道信息的N4容器2的方案,数据包中包含包含目标UPF1的隧道信息的N4容器2。
步骤17.源UPF2根据接收到的第三信息更新路由规则。具体可以参考实施例一中的步骤13。
步骤18.源UPF1向目标UPF2发送第二信息。
源UPF1向目标UPF2发送数据包,数据包包括第二信息。
在第一种实现方式中,在源UPF1接收到第二指示信息之后,源UPF1在向UPF2发送的第一个数据包中添加第二信息,源UPF1向目标UPF2发送该数据包。
在第二种实现方式中,源UPF1直接构造数据包,构造的数据包中包含第二信息,源UPF1向目标UPF2发送构造的数据包。
步骤19:目标UPF2根据接收到的第二信息更新路由规则。具体可以参考实施例一中的步骤13。
步骤20.SMF向AMF发送会话管理上下文更新响应消息,会话管理上下文更新响应消息用于确认第二会话已完成切换。
步骤21.AMF向目标RAN2发送路径切换响应消息,路径切换响应消息用于确认UE2已完成路径切换。
步骤22.SMF向AMF发送会话管理上下文更新响应消息,会话管理上下文更新响应消息用于确认第一会话已完成切换。
步骤23.AMF向目标RAN1发送路径切换响应消息,路径切换响应消息用于确认UE1已完成路径切换。
因此,对于UE1和UE2存在切换冲突的场景,采用上述实施例,可以减少SMF和源UPF2交互的来回以及一个SMF和目标UPF2交互的来回,实现缩短UE1的切换过程的时延和UE2的切换过程的时延。
实施例三
实施例三提供了另一种通信方法,如图8所示。
步骤1至步骤13可以参考上述实施例二中的步骤1至步骤13,图8中未画出。
步骤14.SMF向源UPF2发送N4会话更新请求消息。
在第一种实现方式中,N4会话更新请求消息包含目标UPF2的隧道信息和目标UPF1的隧道信息。
在第二种实现方式中,N4会话更新请求消息包含包含目标UPF2的隧道信息的N4容器3和包含目标UPF1的隧道信息的N4容器4。
此外,SMF还向源UPF2发送目标UPF1的隧道信息。
N4会话建立响应消息包括第三指示信息,第三指示信息用于指示源UPF2向源UPF1发送第四信息,第四信息包括目标UPF2的隧道信息和目标UPF1的隧道信息,或者包含目标UPF2的隧道信息的N4容器3和包含目标UPF1的隧道信息的N4容器4。
步骤15.源UPF2向SMF发送N4会话更新响应消息。
步骤16.源UPF2向源UPF1发送第四信息。
示例性地,源UPF2向源UPF1发送数据包,数据包包括第四信息。
在第一种实现方式中,源UPF2发送结束标记数据包。结束标记数据包包括第四信息。
在第二种实现方式中,源UPF2构造数据包,并将构造的数据包发送给源UPF1。构造的数据包包括第四信息。
在第三种实现方式中,源UPF2接收到UE2到UE1的数据包后,在数据包中添加第四信息。
步骤17.在源UPF1接收到第四信息后,源UPF1根据接收到的第四信息更新路由规则。
步骤18A.源UPF1发送结束标记数据包,结束标记数据包包含包含目标UPF1的隧道信息的N4容器4或目标UPF1的隧道信息。该结束标记数据包由源UPF1发送至源UPF2,再通过源UPF2发送至源RAN2,由源RAN2转发至目标RAN2,目标RAN2将接收到的结束标记数据包发送给目标UPF2。
步骤18B.源UPF1收到UE1发送给UE2的数据包后,将包含目标UPF1的隧道信息的N4容器4或目标UPF1的隧道信息添加至该数据包中,并向目标UPF2发送该数据包。
其中,步骤18A和步骤18B执行任意一项。
步骤19.目标UPF2在接收到包含目标UPF1的隧道信息的N4容器4或目标UPF1的隧道信息后,根据包含目标UPF1的隧道信息的N4容器4或目标UPF1的隧道信息更新路由规则。
步骤20至步骤23可以参考实施例一中的步骤20至步骤23。
因此,对于UE1和UE2存在切换冲突的场景,采用上述实施例,可以减少SMF和源UPF2交互的来回以及一个SMF和目标UPF2交互的来回,实现缩短UE1的切换过程的时延和UE2的切换过程的时延。
图9示出了本申请实施例中所涉及的一种通信装置的可能的示例性框图,该装置900包括:收发模块920和处理模块910,收发模块920可以包括接收单元和发送单元。处理模块910用于对装置900的动作进行控制管理。收发模块920用于支持装置900与其他网络实体的通信。可选地,装置900还可以包括存储单元,所述存储单元用于存储装置900的程序代码和数据。
可选地,所述装置900中各个模块可以是通过软件来实现。
可选地,处理模块910可以是处理器或控制器,例如可以是通用中央处理器(central processing unit,CPU),通用处理器,数字信号处理(digital signal processing,DSP),专用集成电路(application specific integrated circuits,ASIC),现场可编程门阵列(field programmable gate array,FPGA)或者其他可编程逻辑器件、晶体管逻辑器件、硬件部件或者其任意组合。其可以实现或执行结合本申请实施例公开内容所描述的各种示例性的逻辑方框,模块和电路。所述处理器也可以是实现计算功能的组合,例如包含一个或多个微
处理器组合,DSP和微处理器的组合等等。收发模块920可以是通信接口、收发器或收发电路等,其中,该通信接口是统称,在具体实现中,该通信接口可以包括多个接口,存储单元可以是存储器。
当装置900为第一用户面网元或第一用户面网元中的芯片时,装置900中的处理模块910可以支持装置900执行上文中各方法示例中第一用户面网元的动作。
收发模块920可以支持装置900与会话管理网元进行通信,例如,收发模块920可以支持装置900执行图4中的步骤410和步骤420。
例如,处理模块910调用收发模块920执行:
从会话管理网元接收第一指示信息,所述第一指示信息指示所述第一用户面网元向第二用户面网元发送第一信息,所述第一信息用于所述第二用户面网元与所述第一用户面网元通信;向所述第二用户面网元发送所述第一信息。
在一种可能的设计中,收发模块920,用于在向所述第二用户面网元发送所述第一信息时,向所述第二用户面网元发送第一数据包,所述第一数据包包括所述第一信息。
在一种可能的设计中,处理模块910,用于在向所述第二用户面网元发送第一数据包前,构造所述第一数据包,所述第一数据包包含所述第一信息。
在一种可能的设计中,收发模块920,用于在向所述第二用户面网元发送第一数据包前,在接收到所述第一指示信息之后接收到第一个需要发送给所述第二用户面网元的数据包;处理模块910,用于在所述第一个需要发送给所述第二用户面网元的数据包中增加所述第一信息,将增加所述第一信息后的所述第一个需要发送给所述第二用户面网元的数据包作为第一数据包。
在一种可能的设计中,所述第一信息包括第一隧道的信息,所述第一隧道为所述第二用户面网元与所述第一用户面网元通信的隧道。
在一种可能的设计中,所述第一隧道的信息包含在第一透传容器中。
在一种可能的设计中,收发模块920,用于从会话管理网元接收所述第一信息。
应理解,根据本申请实施例的装置900可对应于前述方法实施例中第一用户面网元,并且装置900中的各个模块的操作和/或功能分别为了实现前述方法实施例中第一用户面网元的方法的相应步骤,因此也可以实现前述方法实施例中的有益效果,为了简洁,这里不作赘述。
当装置900为会话管理网元或会话管理网元中的芯片时,装置900中的处理模块910可以支持装置900执行上文中各方法示例中会话管理网元的动作。
收发模块920可以支持装置900与会话管理网元进行通信,例如,收发模块920可以支持装置900执行图4中的步骤400和步骤410。
例如,处理模块910调用收发模块920执行:
接收切换指示信息,所述切换指示信息指示第一终端设备的第一会话待切换,所述第一会话是所述第一终端设备用于与第二终端设备通信的会话;向第一用户面网元发送第一指示信息,所述第一指示信息指示所述第一用户面网元向第二用户面网元发送第一信息,其中,所述第一信息用于所述第二用户面网元与所述第一用户面网元通信,所述第一用户面网元在所述第一会话切换后为所述第一终端设备服务,所述第二用户面网元为所述第二终端设备服务。
在一种可能的设计中,所述第一信息包括所述第一隧道的信息,所述第一隧道为所述
第二用户面网元与所述第一用户面网元通信的隧道。
在一种可能的设计中,所述第一隧道的信息包含在第一透传容器中。
在一种可能的设计中,收发模块920,用于向所述第一用户面网元发送所述第一信息。
应理解,根据本申请实施例的装置900可对应于前述方法实施例中会话管理网元,并且装置900中的各个模块的操作和/或功能分别为了实现前述方法实施例中会话管理网元的方法的相应步骤,因此也可以实现前述方法实施例中的有益效果,为了简洁,这里不作赘述。
当装置900为第二用户面网元或第二用户面网元中的芯片时,装置900中的处理模块910可以支持装置900执行上文中各方法示例中第二用户面网元的动作,例如处理模块910可以支持装置900执行图4中的步骤430。
收发模块920可以支持装置900与第二用户面网元进行通信,例如,收发模块920可以支持装置900执行图4中的步骤420。
例如,收发模块920,用于从第一用户面网元接收第一信息,所述第一信息用于所述第二用户面网元与所述第一用户面网元通信;处理模块910,用于根据所述第一信息更新路由规则,所述路由规则用于所述第二用户面网元向所述第一用户面网元转发数据,所述第一用户面网元为所述第一终端设备服务,所述第二用户面网元为所述第二终端设备服务。
在一种可能的设计中,所述第一信息包括第一隧道的信息,所述第一隧道为所述第二用户面网元与所述第一用户面网元通信的隧道。
在一种可能的设计中,所述第一隧道的信息包含在透传容器中。
应理解,根据本申请实施例的装置900可对应于前述方法实施例中第二用户面网元,并且装置900中的各个模块的操作和/或功能分别为了实现前述方法实施例中第二用户面网元的方法的相应步骤,因此也可以实现前述方法实施例中的有益效果,为了简洁,这里不作赘述。
当装置900为会话管理网元或会话管理网元中的芯片时,装置900中的处理模块910可以支持装置900执行上文中各方法示例中会话管理网元的动作。
收发模块920可以支持装置900与会话管理网元进行通信,例如,收发模块920可以支持装置900执行图5中的步骤500、步骤510和步骤520。
例如,处理模块910调用收发模块920执行:
接收第二切换指示信息,所述第二切换指示信息指示第二终端设备的第二会话待切换,其中,所述第二会话是所述第二终端设备用于与第一终端设备通信的会话;在接收所述第二切换指示信息之后,接收第一切换指示信息,所述第一切换指示信息指示第一终端设备的第一会话待切换,其中,所述第一会话为是所述第一终端设备用于与所述第二终端设备通信的会话;向第一源用户面网元发送第二指示信息,所述第二指示信息用于指示所述第一源用户面网元向第二目标用户面网元发送第二信息,向第二源用户面网元发送第三信息,其中,所述第二源用户面网元在所述第二会话切换前为所述第二终端设备服务,所述第二目标用户面网元在所述第二会话切换后为所述第二终端设备服务,所述第二信息用于所述第二目标用户面网元与第一目标用户面网元通信,所述第三信息用于所述第二源用户面网元与所述第一目标用户面网元通信,所述第一源用户面网元在所述第一会话切换前为所述第一终端设备服务,所述第一目标用户面网元在所述第一会话切换后为所述第一终端设备服务。
在一种可能的设计中,所述第二信息包括第二隧道的信息,所述第二隧道为所述第二目标用户面网元与所述第一目标用户面网元通信的隧道;所述第三信息包括第三隧道的信息,所述第三隧道为所述第二源用户面网元与所述第一目标用户面网元通信的隧道。
在一种可能的设计中,所述第二隧道的信息包含在第二透传容器中,所述第三隧道的信息包含在第三透传容器中。
在一种可能的设计中,收发模块920,用于向所述第一源用户面网元发送所述第二信息;和/或收发模块920,用于向所述第一源用户面网元发送所述第三信息。
应理解,根据本申请实施例的装置900可对应于前述方法实施例中会话管理网元,并且装置900中的各个模块的操作和/或功能分别为了实现前述方法实施例中会话管理网元的方法的相应步骤,因此也可以实现前述方法实施例中的有益效果,为了简洁,这里不作赘述。
当装置900为第一源用户面网元或第一源用户面网元中的芯片时,装置900中的处理模块910可以支持装置900执行上文中各方法示例中第一源用户面网元的动作。
收发模块920可以支持装置900与第一源用户面网元进行通信,例如,收发模块920可以支持装置900执行图5中的步骤520、步骤530和步骤540。
例如,处理模块910调用收发模块920执行:
从会话管理网元接收第二指示信息,所述第二指示信息用于指示所述第一源用户面网元向第二目标用户面网元发送第二信息,向第二源用户面网元发送第三信息,其中,所述第二源用户面网元和所述第二目标用户面网元为第二终端设备服务,所述第二信息用于所述第二目标用户面网元与所述第一目标用户面网元通信,所述第三信息用于所述第二源用户面网元与第一目标用户面网元通信,所述第一源用户面网元和所述第一目标用户面网元为所述第一终端设备服务;向所述第二目标用户面网元发送所述第二信息,向所述第二源用户面网元发送所述第三信息。
在一种可能的设计中,收发模块920,用于从所述会话管理网元接收所述第二信息和/或所述第三信息。
在一种可能的设计中,所述第二信息包括第二隧道的信息,所述第二隧道为所述第二目标用户面网元与所述第一目标用户面网元通信的隧道;所述第三信息包括第三隧道的信息,所述第三隧道为所述第二源用户面网元与所述第一目标用户面网元通信的隧道。
在一种可能的设计中,所述第二隧道的信息包含在第二透传容器中,所述第三隧道的信息包含在第三透传容器中。
在一种可能的设计中,收发模块920,用于在向第二目标用户面网元发送第二信息,向第二源用户面网元发送第三信息时,向所述第二目标用户面网元发送第二数据包,所述第二数据包包括所述第二信息,向所述第二源用户面网元发送第三数据包,所述第三数据包包括第三信息。
在一种可能的设计中,处理模块910,用于在向所述第二目标用户面网元发送第二数据包前,构造所述第二数据包,所述第一数据包包含所述第二信息。
在一种可能的设计中,收发模块920,用于在向所述第二目标用户面网元发送第二数据包前,在接收到所述第二指示信息之后接收到第一个需要发送给所述第二目标用户面网元的数据包;处理模块910,用于在所述第一个需要发送给所述第二目标用户面网元的数据包中增加所述第二信息,将增加所述第二信息后的所述第一个需要发送给第二目标用户
面网元的数据包作为第二数据包。
在一种可能的设计中,所述第三数据包为结束标记数据包。
应理解,根据本申请实施例的装置900可对应于前述方法实施例中第一源用户面网元,并且装置900中的各个模块的操作和/或功能分别为了实现前述方法实施例中第一源用户面网元的方法的相应步骤,因此也可以实现前述方法实施例中的有益效果,为了简洁,这里不作赘述。
图10示出了根据本申请实施例的通信装置1000的示意性结构图。如图10所示,所述装置1000包括:处理器1001。
当装置1000为第一用户面网元或第一用户面网元中的芯片时,一种可能的实现方式中,当所述处理器1001用于调用接口执行以下动作:
从会话管理网元接收第一指示信息,所述第一指示信息指示所述第一用户面网元向第二用户面网元发送第一信息,所述第一信息用于所述第二用户面网元与所述第一用户面网元通信;向所述第二用户面网元发送所述第一信息。
应理解,所述装置1000还可用于执行前文实施例中第一用户面网元侧的其他步骤和/或操作,为了简洁,这里不作赘述。
当装置1000为会话管理网元或会话管理网元中的芯片时,一种可能的实现方式中,当所述处理器1001用于调用接口执行以下动作:
接收切换指示信息,所述切换指示信息指示第一终端设备的第一会话待切换,所述第一会话是所述第一终端设备用于与第二终端设备通信的会话;向第一用户面网元发送第一指示信息,所述第一指示信息指示所述第一用户面网元向第二用户面网元发送第一信息,其中,所述第一信息用于所述第二用户面网元与所述第一用户面网元通信,所述第一用户面网元在所述第一会话切换后为所述第一终端设备服务,所述第二用户面网元为所述第二终端设备服务。
应理解,所述装置1000还可用于执行前文实施例中会话管理网元侧的其他步骤和/或操作,为了简洁,这里不作赘述。
当装置1000为第二用户面网元或第二用户面网元中的芯片时,一种可能的实现方式中,当所述处理器1001用于调用接口执行以下动作:
用于从第一用户面网元接收第一信息,所述第一信息用于所述第二用户面网元与所述第一用户面网元通信;根据所述第一信息更新路由规则,所述路由规则用于所述第二用户面网元向所述第一用户面网元转发数据,所述第一用户面网元为所述第一终端设备服务,所述第二用户面网元为所述第二终端设备服务。
应理解,所述装置1000还可用于执行前文实施例中第二用户面网元侧的其他步骤和/或操作,为了简洁,这里不作赘述。
当装置1000为会话管理网元或会话管理网元中的芯片时,一种可能的实现方式中,当所述处理器1001用于调用接口执行以下动作:
接收第二切换指示信息,所述第二切换指示信息指示第二终端设备的第二会话待切换,其中,所述第二会话是所述第二终端设备用于与第一终端设备通信的会话;在接收所述第二切换指示信息之后,接收第一切换指示信息,所述第一切换指示信息指示第一终端设备的第一会话待切换,其中,所述第一会话为是所述第一终端设备用于与所述第二终端设备通信的会话;向第一源用户面网元发送第二指示信息,所述第二指示信息用于指示所述第
一源用户面网元向第二目标用户面网元发送第二信息,向第二源用户面网元发送第三信息,其中,所述第二源用户面网元在所述第二会话切换前为所述第二终端设备服务,所述第二目标用户面网元在所述第二会话切换后为所述第二终端设备服务,所述第二信息用于所述第二目标用户面网元与第一目标用户面网元通信,所述第三信息用于所述第二源用户面网元与所述第一目标用户面网元通信,所述第一源用户面网元在所述第一会话切换前为所述第一终端设备服务,所述第一目标用户面网元在所述第一会话切换后为所述第一终端设备服务。
应理解,所述装置1000还可用于执行前文实施例中会话管理网元侧的其他步骤和/或操作,为了简洁,这里不作赘述。
当装置1000为第一源用户面网元或第一源用户面网元中的芯片时,一种可能的实现方式中,当所述处理器1001用于调用接口执行以下动作:
从会话管理网元接收第二指示信息,所述第二指示信息用于指示所述第一源用户面网元向第二目标用户面网元发送第二信息,向第二源用户面网元发送第三信息,其中,所述第二源用户面网元和所述第二目标用户面网元为第二终端设备服务,所述第二信息用于所述第二目标用户面网元与所述第一目标用户面网元通信,所述第三信息用于所述第二源用户面网元与第一目标用户面网元通信,所述第一源用户面网元和所述第一目标用户面网元为所述第一终端设备服务;向所述第二目标用户面网元发送所述第二信息,向所述第二源用户面网元发送所述第三信息。
应理解,所述装置1000还可用于执行前文实施例中第一源用户面网元侧的其他步骤和/或操作,为了简洁,这里不作赘述。
应理解,所述处理器1001可以调用接口执行上述收发动作,其中,调用的接口可以是逻辑接口或物理接口,对此不作限定。可选地,物理接口可以通过收发器实现。可选地,所述装置1000还包括收发器1003。
可选地,所述装置1000还包括存储器1002,存储器1002中可以存储上述方法实施例中的程序代码,以便于处理器1001调用。
具体地,若所述装置1000包括处理器1001、存储器1002和收发器1003,则处理器1001、存储器1002和收发器1003之间通过内部连接通路互相通信,传递控制和/或数据信号。在一个可能的设计中,处理器1001、存储器1002和收发器1003可以通过芯片实现,处理器1001、存储器1002和收发器1003可以是在同一个芯片中实现,也可能分别在不同的芯片实现,或者其中任意两个功能组合在一个芯片中实现。该存储器1002可以存储程序代码,处理器1001调用存储器1002存储的程序代码,以实现装置1000的相应功能。
上述本申请实施例揭示的方法可以应用于处理器中,或者由处理器实现。处理器可能是一种集成电路芯片,具有信号的处理能力。在实现过程中,上述方法实施例的各步骤可以通过处理器中的硬件的集成逻辑电路或者软件形式的指令完成。上述的处理器可以是通用处理器、数字信号处理器(digital signal processor,DSP)、专用集成电路(application specific integrated circuit,ASIC)、现成可编程门阵列(field programmable gate array,FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件,还可以是系统芯片(system on chip,SoC),还可以是中央处理器(central processor unit,CPU),还可以是网络处理器(network processor,NP),还可以是数字信号处理电路(digital signal processor,DSP),还可以是微控制器(micro controller unit,MCU),还可以是可编程控制器
(programmable logic device,PLD)或其他集成芯片。可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体现为硬件译码处理器执行完成,或者用译码处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器,闪存、只读存储器,可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器,处理器读取存储器中的信息,结合其硬件完成上述方法的步骤。
可以理解,本申请实施例中的存储器可以是易失性存储器或非易失性存储器,或可包括易失性和非易失性存储器两者。其中,非易失性存储器可以是只读存储器(read-only memory,ROM)、可编程只读存储器(programmable ROM,PROM)、可擦除可编程只读存储器(erasable PROM,EPROM)、电可擦除可编程只读存储器(electrically EPROM,EEPROM)或闪存。易失性存储器可以是随机存取存储器(random access memory,RAM),其用作外部高速缓存。通过示例性但不是限制性说明,许多形式的RAM可用,例如静态随机存取存储器(static RAM,SRAM)、动态随机存取存储器(dynamic RAM,DRAM)、同步动态随机存取存储器(synchronous DRAM,SDRAM)、双倍数据速率同步动态随机存取存储器(double data rate SDRAM,DDR SDRAM)、增强型同步动态随机存取存储器(enhanced SDRAM,ESDRAM)、同步连接动态随机存取存储器(synchlink DRAM,SLDRAM)和直接内存总线随机存取存储器(direct rambus RAM,DR RAM)。应注意,本文描述的系统和方法的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
本领域普通技术人员可以意识到,结合本文中所公开的实施例描述的各示例的单元及算法步骤,能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行,取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能,但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到,为描述的方便和简洁,上述描述的系统、装置和单元的具体工作过程,可以参考前述方法实施例中的对应过程,在此不再赘述。
在本申请所提供的几个实施例中,应该理解到,所揭露的系统、装置和方法,可以通过其它的方式实现。例如,以上所描述的装置实施例仅仅是示意性的,例如,所述单元的划分,仅仅为一种逻辑功能划分,实际实现时可以有另外的划分方式,例如多个单元或组件可以结合或者可以集成到另一个系统,或一些特征可以忽略,或不执行。另一点,所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口,装置或单元的间接耦合或通信连接,可以是电性,机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的,作为单元显示的部件可以是或者也可以不是物理单元,即可以位于一个地方,或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外,在本申请各个实施例中的各功能单元可以集成在一个处理单元中,也可以是各个单元单独物理存在,也可以两个或两个以上单元集成在一个单元中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时,可以存储在一个计算机可读取存储介质中。基于这样的理解,本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来,该计算机
软件产品存储在一个存储介质中,包括若干指令用以使得一台计算机设备(可以是个人计算机,服务器,或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括:U盘、移动硬盘、只读存储器ROM、随机存取存储器RAM、磁碟或者光盘等各种可以存储程序代码的介质。
Claims (28)
- 一种通信方法,其特征在于,该方法包括:第一用户面网元从会话管理网元接收第一指示信息,所述第一指示信息指示所述第一用户面网元向第二用户面网元发送第一信息,所述第一信息用于所述第二用户面网元与所述第一用户面网元通信;所述第一用户面网元向所述第二用户面网元发送所述第一信息。
- 如权利要求1所述的方法,其特征在于,所述第一用户面网元向所述第二用户面网元发送所述第一信息,包括:所述第一用户面网元向所述第二用户面网元发送第一数据包,所述第一数据包包括所述第一信息。
- 如权利要求2所述的方法,其特征在于,在所述第一用户面网元向所述第二用户面网元发送第一数据包前,包括:所述第一用户面网元构造所述第一数据包,所述第一数据包包含所述第一信息。
- 如权利要求2所述的方法,其特征在于,在所述第一用户面网元向所述第二用户面网元发送第一数据包前,包括:所述第一用户面网元在接收到所述第一指示信息之后接收到第一个需要发送给所述第二用户面网元的数据包;所述第一用户面网元在所述第一个需要发送给所述第二用户面网元的数据包中增加所述第一信息,将增加所述第一信息后的所述第一个需要发送给所述第二用户面网元的数据包作为第一数据包。
- 如权利要求1-4任一项所述的方法,其特征在于,所述第一信息包括第一隧道的信息,所述第一隧道为所述第二用户面网元与所述第一用户面网元通信的隧道。
- 如权利要求5所述的方法,其特征在于,所述第一隧道的信息包含在第一透传容器中。
- 如权利要求1-6任一项所述的方法,其特征在于,还包括:所述第一用户面网元从会话管理网元接收所述第一信息。
- 一种通信方法,其特征在于,该方法包括:接收切换指示信息,所述切换指示信息指示第一终端设备的第一会话待切换,所述第一会话是所述第一终端设备用于与第二终端设备通信的会话;向第一用户面网元发送第一指示信息,所述第一指示信息指示所述第一用户面网元向第二用户面网元发送第一信息,其中,所述第一信息用于所述第二用户面网元与所述第一用户面网元通信,所述第一用户面网元在所述第一会话切换后为所述第一终端设备服务,所述第二用户面网元为所述第二终端设备服务。
- 如权利要求8所述的方法,其特征在于,所述第一信息包括所述第一隧道的信息,所述第一隧道为所述第二用户面网元与所述第一用户面网元通信的隧道。
- 如权利要求9所述的方法,其特征在于,所述第一隧道的信息包含在第一透传容器中。
- 如权利要求8-10任一项所述的方法,其特征在于,还包括:向所述第一用户面网元发送所述第一信息。
- 一种通信方法,其特征在于,该方法包括:第二用户面网元从第一用户面网元接收第一信息,所述第一信息用于所述第二用户面网元与所述第一用户面网元通信;所述第二用户面网元根据所述第一信息更新路由规则,所述路由规则用于所述第二用户面网元向所述第一用户面网元转发数据,所述第一用户面网元为所述第一终端设备服务,所述第二用户面网元为所述第二终端设备服务。
- 如权利要求12所述的方法,其特征在于,所述第一信息包括第一隧道的信息,所述第一隧道为所述第二用户面网元与所述第一用户面网元通信的隧道。
- 如权利要求13所述的方法,其特征在于,所述第一隧道的信息包含在透传容器中。
- 一种通信方法,其特征在于,该方法包括:接收第二切换指示信息,所述第二切换指示信息指示第二终端设备的第二会话待切换,其中,所述第二会话是所述第二终端设备用于与第一终端设备通信的会话;在接收所述第二切换指示信息之后,接收第一切换指示信息,所述第一切换指示信息指示第一终端设备的第一会话待切换,其中,所述第一会话是所述第一终端设备用于与所述第二终端设备通信的会话;向第一源用户面网元发送第二指示信息,所述第二指示信息用于指示所述第一源用户面网元向第二目标用户面网元发送第二信息,向第二源用户面网元发送第三信息,其中,所述第二源用户面网元在所述第二会话切换前为所述第二终端设备服务,所述第二目标用户面网元在所述第二会话切换后为所述第二终端设备服务,所述第二信息用于所述第二目标用户面网元与第一目标用户面网元通信,所述第三信息用于所述第二源用户面网元与所述第一目标用户面网元通信,所述第一源用户面网元在所述第一会话切换前为所述第一终端设备服务,所述第一目标用户面网元在所述第一会话切换后为所述第一终端设备服务。
- 如权利要求15所述的方法,其特征在于,所述第二信息包括第二隧道的信息,所述第二隧道为所述第二目标用户面网元与所述第一目标用户面网元通信的隧道;所述第三信息包括第三隧道的信息,所述第三隧道为所述第二源用户面网元与所述第一目标用户面网元通信的隧道。
- 如权利要求16所述的方法,其特征在于,所述第二隧道的信息包含在第二透传容器中,所述第三隧道的信息包含在第三透传容器中。
- 如权利要求15-17任一项所述的方法,其特征在于,还包括:向所述第一源用户面网元发送所述第二信息,和/或向所述第一源用户面网元发送所述第三信息。
- 一种通信方法,其特征在于,该方法包括:第一源用户面网元从会话管理网元接收第二指示信息,所述第二指示信息用于指示所述第一源用户面网元向第二目标用户面网元发送第二信息,向第二源用户面网元发送第三信息,其中,所述第二源用户面网元和所述第二目标用户面网元为第二终端设备服务,所述第二信息用于所述第二目标用户面网元与第一目标用户面网元通信,所述第三信息用于所述第二源用户面网元与所述第一目标用户面网元通信,所述第一源用户面网元和所述第一目标用户面网元为所述第一终端设备服务;所述第一源用户面网元向所述第二目标用户面网元发送所述第二信息,向所述第二源用户面网元发送所述第三信息。
- 如权利要求19所述的方法,其特征在于,还包括:所述第一源用户面网元从所述会话管理网元接收所述第二信息和/或所述第三信息。
- 如权利要求19或20所述的方法,其特征在于,所述第二信息包括第二隧道的信息,所述第二隧道为所述第二目标用户面网元与所述第一目标用户面网元通信的隧道;所述第三信息包括第三隧道的信息,所述第三隧道为所述第二源用户面网元与所述第一目标用户面网元通信的隧道。
- 如权利要求21所述的方法,其特征在于,所述第二隧道的信息包含在第二透传容器中,所述第三隧道的信息包含在第三透传容器中。
- 如权利要求19-22任一项所述的方法,其特征在于,所述第一源用户面网元向第二目标用户面网元发送第二信息,向第二源用户面网元发送第三信息,包括:所述第一源用户面网元向所述第二目标用户面网元发送第二数据包,所述第二数据包包括所述第二信息,向所述第二源用户面网元发送第三数据包,所述第三数据包包括第三信息。
- 如权利要求23所述的方法,其特征在于,在所述第一源用户面网元向所述第二目标用户面网元发送第二数据包前,包括:所述第一源用户面网元构造所述第二数据包,所述第一数据包包含所述第二信息。
- 如权利要求24所述的方法,其特征在于,在所述第一源用户面网元向所述第二目标用户面网元发送第二数据包前,包括:所述第一源用户面网元在接收到所述第二指示信息之后接收到第一个需要发送给所述第二目标用户面网元的数据包;所述第一源用户面网元在所述第一个需要发送给所述第二目标用户面网元的数据包中增加所述第二信息,将增加所述第二信息后的所述第一个需要发送给第二目标用户面网元的数据包作为第二数据包。
- 如权利要求23所述的方法,其特征在于,所述第三数据包为结束标记数据包。
- 一种通信装置,其特征在于,包括处理器和接口电路,所述接口电路用于接收来自所述通信装置之外的其它通信装置的信号并传输至所述处理器或将来自所述处理器的信号发送给所述通信装置之外的其它通信装置,所述处理器通过逻辑电路或执行代码指令用于实现如权利要求1至26中任一项所述的方法。
- 一种计算机可读存储介质,其特征在于,所述存储介质中存储有计算机程序或指令,当所述计算机程序或指令被通信装置执行时,实现如权利要求1至26中任一项所述的方法。
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