WO2020001253A1 - 一种用户面路径更新的方法、装置及计算机存储介质 - Google Patents

一种用户面路径更新的方法、装置及计算机存储介质 Download PDF

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Publication number
WO2020001253A1
WO2020001253A1 PCT/CN2019/090288 CN2019090288W WO2020001253A1 WO 2020001253 A1 WO2020001253 A1 WO 2020001253A1 CN 2019090288 W CN2019090288 W CN 2019090288W WO 2020001253 A1 WO2020001253 A1 WO 2020001253A1
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Prior art keywords
user plane
function module
mobile terminal
notification
anchor point
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PCT/CN2019/090288
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English (en)
French (fr)
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王胡成
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电信科学技术研究院有限公司
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Publication of WO2020001253A1 publication Critical patent/WO2020001253A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W40/00Communication routing or communication path finding
    • H04W40/24Connectivity information management, e.g. connectivity discovery or connectivity update
    • H04W40/248Connectivity information update
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W40/00Communication routing or communication path finding
    • H04W40/24Connectivity information management, e.g. connectivity discovery or connectivity update
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W40/00Communication routing or communication path finding
    • H04W40/34Modification of an existing route
    • H04W40/36Modification of an existing route due to handover
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W76/00Connection management
    • H04W76/20Manipulation of established connections
    • H04W76/22Manipulation of transport tunnels

Definitions

  • the present application relates to the field of mobile communications, and in particular, to a method, a device, and a computer storage medium for updating a user plane path.
  • MEC Mobile Edge Computing
  • the 5G core network needs to complete the migration of the UE context from the original MEC server to the new MEC server at the application layer to complete the user plane path switching in the 3GPP network.
  • the Session Management Function (SMF) module only judges whether the anchor point replacement and user plane path switching are required based on the location of the UE and the data network access identifier (DNI). Or, the SMF module only switches the user plane path according to the request of the application layer (for example, the location of the service content changes), which will cause the following problem:
  • the 5G core network does not know when the application layer MEC server is ready to receive / send data Therefore, a long period of data transmission interruption and packet loss may occur before or after the user plane path switch is performed.
  • the present application provides a method, a device, and a computer storage medium for updating a user plane path, which are used to solve the technical problems of interruption of data transmission and packet loss when switching a user plane path in the prior art.
  • a technical solution of a user plane path updating method provided by an embodiment of the present application is as follows:
  • AF Application Function
  • the SMF module can update the path of the PDU session, update the user plane path of the PDU session based on the new user plane anchor point.
  • the first notification that the user plane anchor needs to be updated is sent to the AF module through the SMF module, so that the AF module can timely transmit the UE context and receive the response information based on the first notification to determine that the path of the PDU session can be updated , And then update the user plane path of the PDU session according to the new user plane anchor point.
  • the SMF module and the AF module can be coordinated in time to reduce the delay and service interruption caused by the change of the PDU session anchor point, thereby improving service continuity.
  • the method before sending the first notification to the application layer AF module, the method further includes:
  • the mobile terminal UE is not within the service range of the new user plane anchor, determining a new distribution point based on the current location of the UE and the new user plane anchor;
  • a new distribution point can be determined through the current location of the UE and the new user plane anchor point, and an access network node serving the UE can be established according to the new distribution point
  • the user plane tunnel to the new distribution point can prepare for subsequent user plane tunnel updates, which can effectively mention the timeliness and accuracy of user plane path switching.
  • the method before sending the first notification to the application layer AF module, the method further includes:
  • the data network access identifier DNAI of the specified application changes, by specifying the application's DNAI and the new user plane anchor point, a new distribution point can be determined, and then the access network node serving the UE and the new distribution point are established according to the new distribution point.
  • the user plane tunnel between the distribution points can be prepared for subsequent user plane tunnel updates, which can effectively mention the timeliness and accuracy of user plane path switching.
  • the response information indicates that the SMF module can Updating the path of the PDU session includes:
  • the response information is information about the target application layer server not being migrated, or the response information is information that a UE context has been migrated to the target application layer server, the response information indicates that the SMF module can The path of the PDU session is updated.
  • updating the user plane path of the PDU session based on the new user plane anchor point further includes:
  • the SMF module By having the SMF module send different information to the UE or the access network according to different types of access points, the efficiency of user plane path switching can be improved.
  • the first notification further includes:
  • the first notification further includes information indicating that the AF module preferentially migrates the context of the UE.
  • sending the first notification to the application layer AF module includes:
  • the SMF module directly sends the first notification to the AF module;
  • the SMF module indirectly sends the first notification to the AF module through a network capability open function (NEF) module or a policy control function (PCF) module.
  • NEF network capability open function
  • PCF policy control function
  • an apparatus for updating a user plane path including:
  • a selection unit which is used to determine a new user plane anchor point when it is necessary to update the original user plane anchor point of the PDU session of the protocol data unit;
  • the transceiver unit is configured to send a first notification to the application-level AF module, and receive a response message returned by the AF module in response to the first notification; wherein the first notification is used to send a notification to the original user plane. Notifying the AF module of the update message of the anchor point;
  • a path updating unit is configured to update the user plane path of the PDU session based on the new user plane anchor if the response message indicates that the SMF module can update the path of the PDU session.
  • the transceiver unit is specifically configured to:
  • the mobile terminal UE is not within the service range of the new user plane anchor point, determining a new distribution point based on the current location of the UE and the new user plane anchor point;
  • the transceiver unit is further configured to:
  • the path update unit Used for:
  • the response information is information about the target application layer server not being migrated, or the response information is information that a UE context has been migrated to the target application layer server, the response information indicates that the SMF module can The path of the PDU session is updated.
  • the path update unit is further configured to:
  • the first notification further includes:
  • the first notification further includes information indicating that the AF module preferentially migrates the context of the UE.
  • the transceiver unit is further configured to:
  • the SMF module directly sends the first notification to the AF module;
  • the SMF module indirectly sends the first notification to the AF module through a network capability open function module NEF or a policy control function PCF.
  • an embodiment of the present application further provides an apparatus for user plane path switching, including:
  • At least one processor and
  • a memory connected to the at least one processor
  • the memory stores instructions executable by the at least one processor, and the at least one processor executes the method according to the first aspect by executing the instructions stored in the memory.
  • an embodiment of the present application further provides a computer-readable storage medium, including:
  • the computer-readable storage medium stores computer instructions, and when the computer instructions are run on a computer, the computer is caused to execute the method according to the first aspect.
  • the embodiments of the present application have at least the following technical effects:
  • a new user plane anchor point is selected; and the first message that needs to update the original user plane anchor point is sent
  • the AF module receives a response message returned by the AF module based on the first notification. If the response message indicates that the SMF module can update the path of the PDU session, the user plane path of the PDU session is updated based on the new user plane anchor point. In this way, when the anchor point is updated, the SMF module and the AF module can be coordinated in time to reduce the delay and service interruption caused by the change of the PDU session anchor point, thereby improving service continuity.
  • FIG. 1 is a flowchart of a user plane path switching method according to an embodiment of the present application
  • FIG. 2 is a schematic diagram of user plane anchor point update triggered by UE movement according to an embodiment of the present application
  • FIG. 3 is a schematic diagram of an update of a user plane anchor point triggered by a movement of application-layer service content according to an embodiment of the present application
  • FIG. 4 is a flowchart of user plane anchor update of a PDU session triggered by UE movement according to an embodiment of the present application
  • FIG. 5 is a flowchart of updating a user plane anchor of a PDU session triggered by a movement of application layer service content according to an embodiment of the present application
  • FIG. 6 is a schematic structural diagram of a user plane path switching device according to an embodiment of the present application.
  • the implementation of the present application provides a method, device and computer storage medium for updating user plane paths, so as to solve the technical problems of interruption of data transmission and packet loss when switching user plane paths in the prior art.
  • a method for user plane path switching which includes: when it is determined that the original user plane anchor point of a protocol data unit PDU session needs to be updated, selecting a new user plane anchor point; sending a first notification to an application layer AF module, and receiving AF A response message returned by the module in response to the first notification; wherein the first notification is used to notify the AF module of a message that the original user plane anchor needs to be updated; if the response message indicates that the SMF module can update the path of the PDU session , Update the user plane path of the PDU session based on the new user plane anchor point.
  • a new user plane anchor point is selected; and the first message that needs to update the original user plane anchor point is sent to the AF module. Then, the AF module receives a response message returned by the AF module based on the first notification. If the response message indicates that the SMF module can update the path of the PDU session, the user plane path of the PDU session is updated based on the new user plane anchor point.
  • the SMF module and the AF module can be coordinated in time to reduce the delay and service interruption caused by the change of the PDU session anchor, thereby improving business continuity.
  • an embodiment of the present application provides a method for updating a user plane path, and a processing process of the method is as follows.
  • Step 101 When it is determined that the original user plane anchor point of the protocol data unit PDU session needs to be updated, a new user plane anchor point is selected.
  • the user plane anchor point may be changed.
  • a user uses a mobile terminal (UE) to watch a TV program (provided by MEC Server)
  • the user may switch from one base station (that is, the access network 1 serving the UE) to another base station while the user is moving.
  • the access network 2 serving the UE resulting in a change in the Radio Access Network (RAN) node serving the UE, causing the user plane anchor point to change, that is, updating from the original user plane anchor point to New user plane anchor.
  • the SMF module can determine whether the UE is in the service range of the original user plane anchor based on the current location of the mobile terminal (UE). If it is not, then it is determined that the original user plane anchor needs to be updated, and a new one is selected according to the current location of the UE.
  • User plane anchor can determine whether the UE is in the service range of the original user plane anchor based on the current location of the mobile terminal (UE). If it is not, then it is determined that the original user plane anchor needs to be updated, and a new one is selected according to the
  • the MEC server 1 When the user is accessing the service content (provided by MEC server 1) after a period of time, when it is migrated to MEC server 2, the MEC server 1 providing service content for the mobile terminal needs to migrate or redirect the user to MEC On server 2, this causes the data network accessed by the terminal to change from data network 1 to data network 2, which may cause the change of the user plane anchor point, that is, update from the original user plane anchor point to the new user plane anchor point.
  • the SMF module needs to determine whether the DNAI of the specified application has changed based on the received data network access identifier (DNAI) list. If it is, then it is determined that the original user plane anchor point needs to be updated, and Select a new user plane anchor point based on the current location of the UE.
  • DNAI data network access identifier
  • step 102 may be performed.
  • Step 102 Send a first notification to the AF module of the application layer, and receive a response message returned by the AF module in response to the first notification; wherein the first notification is used to notify the AF that the original user plane anchor point needs to be updated.
  • Modules; AF modules are servers deployed at the application layer, such as operator service servers, third-party service servers, and MEC servers.
  • the SMF module Before sending the first notification to the server (AF module) deployed at the application layer, if the SMF module determines that the mobile terminal (UE) is not in the service range of the new user plane anchor or specifies the data network access identifier (DNAI of the application) If a change occurs, a new distribution point will be determined according to the current location of the UE and the new user plane anchor point; thereafter, a user plane between the access network node serving the UE and the new distribution point will be established according to the new distribution point. tunnel.
  • the user plane tunnel between the access network node serving the UE and the new branch point is established according to the new branch point, and the uplink and downlink are allocated to the new branch point based on the new branch point and the new user plane anchor point.
  • Tunnel endpoint information ; and send new uplink tunnel endpoint information to the access network corresponding to the new split point, so that the access network corresponding to the new split point can perform uplink tunnel configuration based on the new uplink tunnel endpoint information and send new downlink
  • the tunnel endpoint information reaches the new user plane anchor point, so that the new user plane anchor point can configure the downlink tunnel according to the new downlink tunnel endpoint information, thereby completing the user plane tunnel between the access network node serving the UE and the new split point. set up.
  • the SMF module After the user plane tunnel between the access network node serving the UE and the new distribution point is established, the SMF module sends a first notification to the server AF module deployed at the application layer. Specifically, if the operator of the service content allows the AF module to directly access the network, the SMF module can directly send the first notification to the AF module; or the operator of the service content does not allow the AF module to directly access the network, the SMF module can pass The network capability open function module NEF or the policy control function PCF indirectly sends the first notification to the AF module.
  • the PDU session serves a low-latency high-reliability service
  • the first notification further includes information indicating that the AF module preferentially migrates the context of the UE.
  • step 103 After the SMF module receives the response message returned based on the first notification sent by the AF module, step 103 may be performed.
  • Step 103 If the response message indicates that the SMF module can update the path of the PDU session, update the user plane path of the PDU session based on the new user plane anchor point.
  • the response information indicates that the SMF module can update the path of the PDU session.
  • the SMF module updates the user plane path of the PDU session based on the new user plane anchor, including sending a newly allocated IPv6 prefix and routing rules to the UE; wherein the newly allocated IPv6 prefix and routing rules are for new users. Obtained from the anchor point; or, send information to the UE's access network or distribution point to tunnel the PDU session.
  • the SMF module notifies the original user plane anchor point to release the tunnel resources, and completes the switching of the entire user plane path.
  • Embodiment 1 User plane anchor update of a PDU session triggered by UE movement:
  • Step 401 The SMF module determines that the original user plane anchor point (Old User Plane Function, Old UPF) of the PDU session needs to be updated according to the current location of the UE, and selects a new user plane anchor point and a shunt point.
  • Original UPF Original User Plane Function
  • the current position of the UE may be determined according to a node identifier of an access network RAN serving the UE, a tracking area identifier where the UE is located, and the like.
  • the branch point can be a branch point (BP) (for an IPv6 class address) or an uplink classifier (Uplink Classifier (UL) CL) branch point (also known as an uplink and downlink branch). IPv4 address).
  • BP branch point
  • UL Uplink Classifier
  • the SMF module completes the selection of the new user plane anchor point and the shunt point (BP or UL CL) according to the existing process in the prior art, and will not be repeated here.
  • the SMF module needs to allocate an IPv6 prefix to the shunt point (BP) while selecting the shunt point.
  • Step 402 If the distribution point (BP or UL CL) changes, the SMF module sends the upstream tunnel endpoint information of the distribution point to the target access network (RAN).
  • RAN target access network
  • the target access network is an access network corresponding to a new user plane anchor (new UPF).
  • the SMF module sends an N2 Session Management (N2 Session Management) message to the target RAN access network through an Authentication Management Function (AMF) module, and the message carries a shunting point (BP or UL CL) assigned uplink tunnel endpoint information.
  • N2 Session Management N2 Session Management
  • AMF Authentication Management Function
  • the distribution point is a BP distribution point
  • the target access network (RAN) performs uplink tunnel configuration based on the received BP tunnel endpoint; when the distribution point is a UL and CL distribution point, the target access network RAN only saves the UL CL tunnel endpoint , And wait for further instructions from the SMF module before performing uplink tunnel configuration.
  • Step 403 The SMF module sends the first notification to the AF module to perform user plane anchor switching, and receives a response message returned based on the first notification.
  • the first notification is to indicate that the user plane anchor point update has been completed in the core network. If the operator allows the AF module to directly access the network, the SMF module can directly send the first notification to the AF module, otherwise it needs to forward through the NEF or PCF and indirectly send the first notification to the AF module.
  • the AF module After the AF module receives the first notification that the user plane anchor point is to be switched, the context of the UE is switched. After the AF module completes the context switch to the UE, it will send response information to the SMF module, and the response information will also indicate whether the migration of the application layer server will occur. If the response message indicates that the application layer server will migrate, the SMF module needs to wait for further instructions from the AF module (indicating that the migration of the application layer server has been completed), and switch the user plane path according to the type of the offload point (UL, CL, or BP) ; If the response message indicates that the application layer server will not migrate, the user plane path is switched according to the type of the shunt point (whether it is UL CL or BP).
  • switching the user plane path according to the type of the shunt point includes:
  • step 404a is performed when the user plane path is switched: the SMF module sends an instruction to the target access network (RAN) to perform an uplink tunnel switch for the PDU session.
  • RAN target access network
  • step 404b is performed when the user plane path is switched: the SMF module sends the newly allocated IPv6 prefix and routing rule to the UE.
  • the SMF module notifies the original user plane anchor point and distribution point to release tunnel resources.
  • FIG. 5 is an update of the user plane anchor caused by changes in the business content of the application layer.
  • Step 500 The SMF module sends a notification to the AF module whether to update the user plane anchor point.
  • the SMF module can grasp the DNAI of all applications according to the DNAI list carried in the AF module request sent by the AF module, when the SMF module receives the updated DNAI list, the SMF module can judge the current location of the UE and the DNAI of the application Whether the user plane anchor point needs to be updated. If the user plane anchor point is not required to be updated, the SMF module sends a notification to the AF module that the user plane anchor point does not need to be updated, so that the AF module can delete the UE context after the UE context transmission is completed. If the determination result is that the user plane anchor point needs to be updated, after the UE context transmission is completed, the UE context is retained, and step 501 is performed.
  • Step 501 The SMF module determines to update the original user plane anchor point of the PDU session according to the current location of the UE and the DNAI of the designated application in the DNAI list, and selects a new user plane anchor point and a shunt point.
  • the distribution point can be a BP distribution point (for an IPv6 class address) or a UL CL distribution point (also referred to as an upstream and downstream splitter, which addresses an IPv4 class address).
  • the user plane anchor point of the PDU session (including the changed new user anchor point and the original user plane anchor point, and the unchanged user plane anchor point 1 (UPF1)) need to be established and modified.
  • the selected distribution point is a BP distribution point
  • an IPv6 prefix needs to be assigned to it.
  • the SMF module completes the selection of the new user plane anchor point and the shunt point (BP or UL CL) according to the existing process in the prior art, and will not be repeated here.
  • the SMF module needs to allocate an IPv6 prefix to the shunt point (BP) while selecting the shunt point.
  • step 502 may be performed.
  • Step 502 If the distribution point (BP or UL CL) changes, the SMF module sends a distribution point uplink tunnel endpoint message to the target access network (RAN).
  • RAN target access network
  • step 502 is the same as step 402, it will not be repeated here.
  • Step 503a the SMF module sends a first notification to the AF module.
  • the AF module When the AF module receives the first notification that the original user plane anchor point needs to be updated, it transmits the UE context (transmits the UE context from the original AF module for the original user plane anchor point to the new user plane anchor point. Corresponding new AF module), and release the UE context saved locally by the original AF module after the transmission is completed. After that, the original AF module returns a response message of the first notification to the SMF module.
  • Step 503b The SMF module receives a response message based on the first notification.
  • the SMF module After the SMF module receives the response message that the path can be switched, the SMF module updates the user plane of the PDU session.
  • step 504a is performed when the user plane path is switched: the SMF module sends an instruction to the target access network (RAN) to perform an uplink tunnel switch for the PDU session.
  • RAN target access network
  • step 504b is performed when the user plane path is switched: the SMF module sends the newly allocated IPv6 prefix and routing rule to the UE.
  • the SMF module notifies the original user plane anchor point and distribution point to release tunnel resources.
  • an embodiment of the present application provides a device for updating a user plane path.
  • a device for updating a user plane path of the device For a specific implementation manner of a method for updating a user plane path of the device, refer to the description in the method embodiment. See Figure 6.
  • the device includes:
  • a selecting unit 601 is configured to select a new user plane anchor point when it is necessary to update the original user plane anchor point of the PDU session of the protocol data unit;
  • the sending and receiving unit 602 is configured to send a first notification to the application layer AF module, and receive a response message returned by the AF module in response to the first notification; wherein the first notification is used to send the original user the need to Notifying the AF module of a message that the surface anchor point is updated;
  • a path updating unit 603 is configured to update the user plane path of the PDU session based on the new user plane anchor if the response message indicates that the SMF module can update the path of the PDU session.
  • the transceiver unit 602 is specifically configured to:
  • the mobile terminal UE is not within the service range of the new user plane anchor point, determining a new distribution point based on the current location of the UE and the new user plane anchor point;
  • the transceiver unit 602 is further configured to:
  • the path update unit 603 is configured to:
  • the response information is information about the target application layer server not being migrated, or the response information is information that a UE context has been migrated to the target application layer server, the response information indicates that the SMF module can The path of the PDU session is updated.
  • the path update unit 603 is further configured to:
  • the first notification further includes:
  • the first notification further includes information indicating that the AF module preferentially migrates the context of the UE.
  • the transceiver unit 602 is further configured to:
  • the SMF module directly sends the first notification to the AF module;
  • the SMF module indirectly sends the first notification to the AF module through a network capability open function module NEF or a policy control function PCF.
  • an embodiment of the present application provides a communication system.
  • a user plane path updating method of the communication system reference may be made to the description in the method embodiment. The duplicated details are not described repeatedly.
  • the device includes:
  • the session management function SMF module is used to select a new user plane anchor when it is determined that the original user plane anchor of the protocol data unit PDU session needs to be updated; send a first notification to the application layer AF module, and receive the AF module A response message returned in response to the first notification; wherein the first notification is used to notify the AF module of a message that the original user plane anchor needs to be updated; if the response message indicates that the When the SMF module can update the path of the PDU session, the user plane path of the PDU session is updated based on the new user plane anchor point;
  • the application layer server AF module is configured to receive the first notification sent by the SMF module, and transmit the UE context, and return the response information based on the first notification after the transmission is completed;
  • the user plane function UPF is configured to receive and configure a tunnel configuration instruction related to the user plane path update.
  • the SMF module is further configured to:
  • the SMF module determines a new distribution point based on the current location of the UE and the new user plane anchor point;
  • the SMF module is further configured to:
  • the UPF is specifically used for:
  • the SMF module is further configured to:
  • the UPF is further used for:
  • an embodiment of the present application provides a device for updating a user plane path, including: at least one processor, and
  • a memory connected to the at least one processor
  • the memory stores instructions executable by the at least one processor, and the at least one processor executes the user plane path updating method described above by executing the instructions stored in the memory.
  • an embodiment of the present application further provides a computer-readable storage medium, including:
  • the computer-readable storage medium stores computer instructions, and when the computer instructions are run on a computer, the computer is caused to execute the user plane path updating method as described above.
  • a new user plane anchor point is selected; and the first message that needs to update the original user plane anchor point is sent
  • the AF module receives a response message returned by the AF module based on the first notification. If the response message indicates that the SMF module can update the path of the PDU session, the user plane path of the PDU session is updated based on the new user plane anchor point.
  • the SMF module and the AF module can be coordinated in time to reduce the delay caused by the change of the PDU session anchor point and the service terminal, thereby improving service continuity.
  • the embodiments of the present application may be provided as a method, a system, or a computer program product. Therefore, the embodiments of the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Moreover, in the embodiments of the present application, one or more computer-usable storage media (including, but not limited to, disk storage and CD-ROM) containing computer-usable program code may be used. , Optical storage, etc.).
  • Embodiments of the present application are described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or block in the flowcharts and / or block diagrams, and combinations of processes and / or blocks in the flowcharts and / or block diagrams can be implemented by computer program instructions.
  • These computer program instructions may be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing device to produce a machine, so that instructions generated by the processor of the computer or other programmable data processing device may be used to Means for implementing the functions specified in one or more flowcharts and / or one or more blocks of the block diagrams.
  • These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to work in a specific manner such that the instructions stored in the computer-readable memory produce a manufactured article including an instruction device, the instructions
  • the device implements the functions specified in one or more flowcharts and / or one or more blocks of the block diagram.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device, so that a series of steps can be performed on the computer or other programmable device to produce a computer-implemented process, which can be executed on the computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more flowcharts and / or one or more blocks of the block diagrams.

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Abstract

本申请公开了一种用户面路径更新的方法、装置及计算机存储介质,用以解决现有技术中存在的对用户面路径进行切换时,存在较多数据传输中断及丢包的技术问题。该方法包括:确定需要对协议数据单元会话的原用户面锚点进行更新时,选择新用户面锚点;发送第一通知给应用层的应用功能模块,并接收所述应用功能模块返回的响应所述第一通知的响应消息;其中,所述第一通知用于将需要对所述原用户面锚点进行更新的消息通知给所述应用功能模块;若所述响应消息表明所述会话管理功能模块可以对所述协议数据单元会话的路径进行更新时,基于所述新用户面锚点对所述协议数据单元会话的用户面路径进行更新。

Description

一种用户面路径更新的方法、装置及计算机存储介质
本申请要求在2018年6月26日提交中国专利局、申请号为201810672475.3、申请名称为“一种用户面路径更新的方法、装置及计算机存储介质”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。
技术领域
本申请涉及移动通信领域,尤其是涉及一种用户面路径更新的方法、装置及计算机存储介质。
背景技术
移动边缘计算(Mobile Edge Computing,MEC),是将虚拟化的平台引入移动网络中,能有效实现业务锚点下沉,缩短业务响应时间。
在5G网络中,由于需要提供超低时延,超高可靠性通信的相关技术,所以在MEC场景下,当业务内容或移动终端(user equipment,UE)发生移动时,需要保证业务连续性,使应用层的业务不被中断。为了保证应用层业务不会中断,5G核心网需要在应用层将UE上下文从原MEC服务器到新MEC服务器的迁移完成后,才能完成3GPP网络内的用户面路径切换。
然而,在现有技术中,会话管理功能(Session Management Function,SMF)模块仅根据UE的位置、数据网络接入标识(DN Access Identifier,DNAI)来判断是否需要进行锚点更换和用户面路径切换,或者SMF模块仅根据应用层的请求(例如业务内容的位置发生变化)进行用户面路径切换,这样就会造成了以下问题:5G核心网不知道应用层MEC服务器何时准备好接收/发送数据,因此在进行用户面路径切换之前或之后可能会造成较长时间的数据传输中断和丢包。
基于此,如何对用户面路径进行切换,以减少数据传输中断及丢包情况的发生成为一个亟待解决的技术问题。
发明内容
本申请提供一种用户面路径更新的方法、装置及计算机存储介质,用以解决现有技术中存在的对用户面路径进行切换时,存在较多数据传输中断及丢包的技术问题。
第一方面,为解决上述技术问题,本申请实施例提供的一种用户面路径更新方法的技术方案如下:
确定需要对协议数据单元(Protocol Data Unit,PDU)会话的原用户面锚点进行更新时,选择新用户面锚点;
发送第一通知给应用层的应用功能(Application Function,AF)模块,并接收所述AF模块返回的响应所述第一通知的响应消息;其中,所述第一通知用于将需要对所述原用户面锚点进行更新的消息通知给所述AF模块;
若所述响应消息表明所述SMF模块可以对所述PDU会话的路径进行更新时,基于所述新用户面锚点对所述PDU会话的用户面路径进行更新。
通过SMF模块将用户面锚点需要更新的第一通知发送给AF模块,让AF模块可以及时的对UE上下文进行传送,并接收基于第一通知的响应信息确定可以对PDU会话的路径进行更新时,再根据新用户面锚点对PDU会话的用户面路径进行更新。这样在锚点更新时,能够及时的对SMF模块和AF模块进行协调,减少由于PDU会话锚点的变化造成的时延及业务中断,从而提高业务的连续性。
结合第一方面,在第一方面的第一种可能的实施方式中,发送第一通知给应用层AF模块之前,还包括:
若移动终端UE不在所述新用户面锚点的服务范围内,则基于UE的当前位置及所述新用户面锚点,确定新的分流点;
根据所述新的分流点,建立服务所述UE的接入网节点与所述新的分流点之间的用户面隧道;其中,所述UE为所述PDU会话中的UE。
当移动终端UE不在新用户面锚点的服务范围内时,通过UE的当前位置及新用户面锚点,可以确定新的分流点,进而根据新的分流点,建立服务UE 的接入网节点与新的分流点之间的用户面隧道,可以为后续进行用户面隧道的更新做好准备工作,从而能有效的提到用户面路径切换的及时性和准确性。
结合第一方面,在第一方面的第二种可能的实施方式中,发送第一通知给应用层AF模块之前,还包括:
若指定应用的数据网络接入标识符DNAI发生变化,则基于所述指定应用的DNAI及所述新用户面锚点,确定新的分流点;
根据所述新的分流点,建立服务所述UE的接入网节点与所述新的分流点之间的用户面隧道;其中,所述指定应用为所述PDU会话中的应用。
当指定应用的数据网络接入标识符DNAI发生变化,通过指定应用的DNAI及新用户面锚点,可以确定新的分流点,进而根据新的分流点,建立服务UE的接入网节点与新的分流点之间的用户面隧道,可以为后续进行用户面隧道的更新做好准备工作,从而能有效的提到用户面路径切换的及时性和准确性。
结合第一方面至第一方面的第二种可能的实施方式中的任一种可能的实施方式,在第一方面的第三种可能的实施方式中,所述响应信息表明所述SMF模块可以对所述PDU会话的路径进行更新,包括:
若所述响应信息为关于目标应用层服务器不迁移的信息,或所述响应信息为UE上下文已迁移到所述目标应用层服务器的信息,则所述响应信息表明所述SMF模块可以对所述PDU会话的路径进行更新。
结合第一方面的第一种可能的实施方式,在第一方面的第四种可能的实施方式中,基于所述新用户面锚点对所述PDU会话的用户面路径进行更新,还包括:
发送为所述UE新分配的IPv6前缀和路由规则给所述UE;其中,所述新分配的IPv6前缀和路由规则是就所述新用户面锚点获得的;
或,向所述UE的接入网或分流点发送对所述PDU会话进行隧道切换的信息。
通过让SMF模块根据接入点的不同类型为向UE或接入网发送不同的信 息,可以提高用户面路径的切换效率。
结合第一方面,在第一方面的第五种可能的实施方式中,所述第一通知,还包括:
若所述PDU会话是服务于低时延高可靠业务,则所述第一通知还包括指示所述AF模块优先对所述UE的上下文进行迁移的信息。
结合第一方面,在第一方面的第六种可能的实施方式中,发送第一通知给应用层AF模块,包括:
所述SMF模块直接发送所述第一通知给所述AF模块;或
所述SMF模块通过网络能力开放功能(Network Element Function,NEF)模块或策略控制功能(Policy Control Function,PCF)模块间接发送所述第一通知给所述AF模块。
第二方面,本申请实施例提供了一种用于用户面路径更新的装置,包括:
选择单元,用于确定需要对协议数据单元PDU会话的原用户面锚点进行更新时,选择新用户面锚点;
收发单元,用于发送第一通知给应用层AF模块,并接收所述AF模块返回的响应所述第一通知的响应消息;其中,所述第一通知用于将需要对所述原用户面锚点进行更新的消息通知给所述AF模块;
路径更新单元,用于若所述响应消息表明所述SMF模块可以对所述PDU会话的路径进行更新时,基于所述新用户面锚点对所述PDU会话的用户面路径进行更新。
结合第二方面,在第二方面的第一种可能的实施方式中,所述收发单元,具体用于:
若移动终端UE不在所述新用户面锚点的服务范围内,则基于所述UE的当前位置及所述新用户面锚点,确定新的分流点;
根据所述新的分流点,建立服务所述UE的接入网节点与所述新的分流点之间的用户面隧道;其中,所述UE为所述PDU会话中的UE。
结合第二方面,在第二方面的第二种可能的实施方式中,所述收发单元, 还用于:
若指定应用的数据网络接入标识符DNAI发生变化,则基于所述指定用的DNAI及所述新用户面锚点,确定新的分流点;
根据所述新的分流点,建立服务所述UE的接入网节点与所述新的分流点之间的用户面隧道;其中,所述UE为所述PDU会话中的UE。
结合第二方面至第二方面的第二种可能的实施方式中的任一种可能的实施方式,在第二方面的第三种可能的实施方式中,其特在于,所述路径更新单元,用于:
若所述响应信息为关于目标应用层服务器不迁移的信息,或所述响应信息为UE上下文已迁移到所述目标应用层服务器的信息,则所述响应信息表明所述SMF模块可以对所述PDU会话的路径进行更新。
结合第二方面,在第二方面的第四种可能的实施方式中,所述路径更新单元,还用于:
发送为所述UE新分配的IPv6前缀和路由规则给所述UE;其中,所述新分配的IPv6前缀和路由规则是就所述新用户面锚点获得的;
或,向所述UE的接入网或分流点发送对所述PDU会话进行隧道切换的信息。
结合第二方面,在第二方面的第五种可能的实施方式中,所述第一通知,还包括:
若所述PDU会话是服务于低时延高可靠业务,则所述第一通知还包括指示所述AF模块优先对所述UE的上下文进行迁移的信息。
结合第二方面,在第二方面的第六种可能的实施方式中,所述收发单元,还用于:
所述SMF模块直接发送所述第一通知给所述AF模块;或
所述SMF模块通过网络能力开放功能模块NEF或策略控制功能PCF间接发送所述第一通知给所述AF模块。
第三方面,本申请实施例还提供一种用于用户面路径切换的装置,包括:
至少一个处理器,以及
与所述至少一个处理器连接的存储器;
其中,所述存储器存储有可被所述至少一个处理器执行的指令,所述至少一个处理器通过执行所述存储器存储的指令,执行如上述第一方面所述的方法。
第四方面,本申请实施例还提供一种计算机可读存储介质,包括:
所述计算机可读存储介质存储有计算机指令,当所述计算机指令在计算机上运行时,使得计算机执行如上述第一方面所述的方法。
通过本申请实施例的上述一个或多个实施例中的技术方案,本申请实施例至少具有如下技术效果:
在本申请提供的实施例中,通过SMF模块确定需要对PDU会话的原用户面锚点进行更新时,选择新用户面锚点;并将需要对原用户面锚点进行更新的第一消息发送给AF模块,随后接收AF模块基于第一通知返回的响应消息,若响应消息表明SMF模块可以对PDU会话的路径进行更新时,则基于新用户面锚点对PDU会话的用户面路径进行更新。这样在锚点更新时,能够及时的对SMF模块和AF模块进行协调,减少由于PDU会话锚点的变化造成的时延及业务中断,从而提高业务的连续性。
附图说明
为了更清楚地说明本申请实施例或现有技术中的技术方案,下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本申请实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据提供的附图获得其他的附图。
图1为本申请实施例提供的一种用户面路径切换方法的流程图;
图2为本申请实施例提供的由于UE移动触发的用户面锚点更新的示意图;
图3为本申请实施例提供的由于应用层业务内容发生移动触发的用户面 锚点更新的示意图;
图4为本申请实施例提供的由于UE移动触发的PDU会话的用户面锚点更新的流程图;
图5为本申请实施例提供的由于应用层业务内容发生移动触发的PDU会话的用户面锚点更新的流程图;
图6为本申请实施例提供的一种用户面路径切换装置的结构示意图。
具体实施方式
本申请实施列提供一种用户面路径更新的方法、装置及计算机存储介质,以解决现有技术中存在的对用户面路径进行切换时,存在较多数据传输中断及丢包的技术问题。
本申请实施例中的技术方案为解决上述的技术问题,总体思路如下:
提供一种用户面路径切换的方法,包括:确定需要对协议数据单元PDU会话的原用户面锚点进行更新时,选择新用户面锚点;发送第一通知给应用层AF模块,并接收AF模块返回的响应第一通知的响应消息;其中,第一通知用于将需要对原用户面锚点进行更新的消息通知给AF模块;若响应消息表明SMF模块可以对PDU会话的路径进行更新时,基于新用户面锚点对PDU会话的用户面路径进行更新。
由于在上述方案中,通过SMF模块确定需要对PDU会话的原用户面锚点进行更新时,选择新用户面锚点;并将需要对原用户面锚点进行更新的第一消息发送给AF模块,随后接收AF模块基于第一通知返回的响应消息,若响应消息表明SMF模块可以对PDU会话的路径进行更新时,则基于新用户面锚点对PDU会话的用户面路径进行更新。在锚点更新时,能够及时的对SMF模块和AF模块进行协调,减少由于PDU会话锚点的变化造成的时延及业务中断,从而提高业务的连续性。
为了更好的理解上述技术方案,下面通过附图以及具体实施例对本申请技术方案做详细的说明,应当理解本申请实施例以及实施例中的具体特征是 对本申请技术方案的详细的说明,而不是对本申请技术方案的限定,在不冲突的情况下,本申请实施例以及实施例中的技术特征可以相互组合。
请参考图1,本申请实施例提供一种用户面路径更新的方法,该方法的处理过程如下。
步骤101:确定需要对协议数据单元PDU会话的原用户面锚点进行更新时,选择新用户面锚点。
在移动通信网络中,当移动终端发生移动或为移动终端提供服务的业务内容发生迁移时,都可能会引起用户面锚点的改变。
请参见图2,当用户使用移动终端(UE)观看电视节目(由MEC Server提供)时,在用户移动的过程中,可能从一个基站(即服务UE的接入网1)切换到另一个基站(即服务UE的接入网2),从而导致服务UE的无线接入网(Radio Access Network,RAN)节点发生变化,引起用户面锚点的改变,即从原来的原用户面锚点更新到新用户面锚点。通常,SMF模块可以根据移动终端(UE)的当前位置,判断UE是否在原用户面锚点的服务范围内,若不在则确定需要对原用户面锚点进行更新,并根据UE的当前位置选择新用户面锚点。
请参见图3,当用户正在访问的业务内容(由MEC server 1提供)在一段时间之后,迁移到MEC server 2时,为移动终端提供业务内容的MEC server 1需要将用户迁移或重定向到MEC server 2上,这导致终端访问的数据网络从数据网络1变换为数据网络2,从而可能引起用户面锚点的改变,即从原来的原用户面锚点更新到新用户面锚点。通常,SMF模块需要根据接收到的数据网络接入标识符(DN Access Identifier,DNAI)列表,判断指定应用的DNAI是否发生变化,若为是,则确定需要对原用户面锚点进行更新,并根据UE的当前位置选择新用户面锚点。
在SMF模块选择新用户面锚点之后,便可执行步骤102。
步骤102:发送第一通知给应用层的AF模块,并接收AF模块返回的响应第一通知的响应消息;其中,第一通知用于将需要对原用户面锚点进行更 新的消息通知给AF模块;AF模块为部署在应用层的服务器,例如运营商业务服务器、第三方业务服务器、MEC服务器等。
在发送第一通知给部署在应用层的服务器(AF模块)之前,若SMF模块确定移动终端(UE)不在新用户面锚点的服务范围内,或指定应用的数据网络接入标识符(DNAI)发生变化,则会根据UE的当前位置及新用户面锚点,确定新的分流点;之后,根据新的分流点,建立服务UE的接入网节点与新的分流点之间的用户面隧道。
具体的,根据新的分流点,建立服务UE的接入网节点与新的分流点之间的用户面隧道,是根据新的分流点与新用户面锚点,为新的分流点分配上下行隧道端点信息;并发送新的上行隧道端点信息到新的分流点对应的接入网络,使新的分流点对应的接入网络能根据新的上行隧道端点信息进行上行隧道配置,发送新的下行隧道端点信息到新用户面锚点,使得新用户面锚点能够根据新的下行隧道端点信息进行下行隧道配置,从而完成服务UE的接入网节点与新的分流点之间的用户面隧道的建立。
在建立好服务UE的接入网节点与新的分流点之间的用户面隧道之后,SMF模块发送第一通知给部署在应用层的服务器AF模块。具体的,若业务内容的运营商允许AF模块直接接入网络,则SMF模块可以直接发送第一通知给AF模块;或业务内容的运营商不允许AF模块直接接入网络,则SMF模块可以通过网络能力开放功能模块NEF或策略控制功能PCF间接发送第一通知给AF模块。
其中,PDU会话是服务于低时延高可靠业务,则第一通知还包括指示AF模块优先对UE的上下文进行迁移的信息。
在SMF模块接收到AF模块发送的基于第一通知返回的响应消息之后,便可执行步骤103。
步骤103:若响应消息表明SMF模块可以对PDU会话的路径进行更新时,基于新用户面锚点对PDU会话的用户面路径进行更新。
其中,若响应信息为关于目标应用层服务器不迁移的信息,或响应信息 为UE上下文已迁移到目标应用层服务器的信息,则响应信息表明SMF模块可以对PDU会话的路径进行更新。
具体的,SMF模块基于新用户面锚点对PDU会话的用户面路径进行更新包括,发送为UE新分配的IPv6前缀和路由规则给UE;其中,新分配的IPv6前缀和路由规则是就新用户面锚点获得的;或,向UE的接入网或分流点发送对PDU会话进行隧道切换的信息。
之后,SMF模块通知原用户面锚点进行隧道资源释放,便完成了整个用户面路径的切换。
为了使本领域的技术如人员能够更加清楚的理解本方案,下面将提供两个实施例进行解释说明。
实施例一、由UE移动触发的PDU会话的用户面锚点更新:
请参见图4,UE在移动的过程中,导致接入网RAN节点发生变化时,
步骤401:SMF模块根据UE的当前位置确定需要对PDU会话的原用户面锚点(Old User Plane Function,Old UPF)进行更新,并选择了新用户面锚点及分流点。
其中,UE的当前位置可以根据为UE提供服务的接入网RAN的节点标识、UE所在跟踪区标识等确定。分流点可以是分流点(Branching Point,BP)(针对的是IPv6类的地址)也可以是上行分类器(Uplink Classifier,UL CL)分流点(也可称之为上下行分流器,针对的是IPv4类的地址)。
需要理解的是,SMF模块是按照现有技术中的现有流程完成对新用户面锚点和分流点(BP或UL CL)的选择的,在此不再赘述。并且,在PDU会话的用户面传输路径中,如果需要使用分流点(BP)则SMF模块在选好分流点的同时还需要为分流点(BP)分配IPv6前缀。
步骤402、若分流点(BP或UL CL)发生了变化,则SMF模块发送分流点上行隧道端点信息给目标接入网(RAN)。
其中,目标接入网(RAM)是与新用户面锚点(新UPF)相对应的接入网络。
具体的,SMF模块是通过认证管理功能(Authentication Management Function,AMF)模块向目标RAN接入网发送N2会话管理(N2 Session Management,N2 SM)消息的,该消息中携带了为分流点(BP或UL CL)分配的上行隧道端点信息。当分流点为BP分流点时,目标接入网(RAN)根据接收到的BP隧道端点进行上行隧道配置;当分流点为UL CL分流点时,目标接入网RAN仅保存UL CL的隧道端点,并等待SMF模块的进一步指令再进行上行隧道配置。
步骤403:SMF模块发送要进行用户面锚点切换的第一通知给AF模块,并接收基于第一通知返回的响应消息。
其中,第一通知为指示核心网内已经完成了对用户面锚点的更新。若运营商允许AF模块直接接入网络则SMF模块可以直接将第一通知发送给AF模块,否则需要通过NEF或PCF进行转发,间接的将第一通知发送给AF模块。
在AF模块接收到要进行用户面锚点切换的第一通知之后,会对UE的上下文进行切换。当AF模块完成对UE上下文切换之后,会向SMF模块发送响应信息,并且在该响应信息中还会指示是否会发生应用层服务器的迁移。若响应消息表明应用层服务器会发生迁移,则SMF模块需要等待AF模块的进一步指令(指示应用层服务器的迁移已完成)根据分流点的类型(是UL CL还是BP),对用户面路径进行切换;若响应消息表明应用层服务器不会发生迁移,则根据分流点的类型(是UL CL还是BP),对用户面路径进行切换。
具体的,根据分流点的类型(是UL CL还是BP),对用户面路径进行切换,包括:
若分流点为UL CL分流点,则进行用户面路径切换时执行步骤404a:SMF模块向目标接入网(RAN)发送为PDU会话进行上行隧道切换的指令。
若分流点为BP分流点,则进行用户面路径切换时执行步骤404b:SMF模块向UE发送新分配的IPv6前缀及路由规则。
最后,SMF模块通知原用户面锚点及分流点进行隧道资源释放。
至此,便完成了整个用户面路径的切换。
实施列二、由业务内容迁移触发的PDU会话的用户面锚点更新。
请参见图5,为由于应用层的业务内容发生改变,引起的用户面锚点更新。
步骤500:SMF模块向AF模块发送是否更新用户面锚点的通知。
由于SMF模块可以根据AF模块发送的AF模块请求中携带的DNAI列表,掌握所有应用的DNAI,所以在SMF模块接收到更新的DNAI列表时,SMF模块可以根据UE的当前位置及对应用的DNAI判断是否需要更新用户面锚点,如果不需要更新用户面锚点,SMF模块向AF模块发送不需更新用户面锚点的通知,使AF模块在完成UE上下文传送后,可以删除UE上下文。若判断结果为需要更新用户面锚点,则在完成UE上下文传送后,保留UE上下文,并执行步骤501。
步骤501:SMF模块根据UE当前位置及DNAI列表中指定应用的DNAI确定对PDU会话的原用户面锚点进行更新,并选择新用户面锚点、分流点。
分流点可以是BP分流点(针对的是IPv6类的地址)也可以是UL CL分流点(也可称之为上下行分流器,针对的是IPv4类的地址)。
其中,还需要对于PDU会话的用户面锚点(包括发生了改变的新用户锚点及原用户面锚点、未发生改变的用户面锚点1(UPF1))进行N4会话建立、修改。在PDU会话中,若还需要使用分流点,则在选择的分流点为BP分流点时还需要为其分配IPv6前缀。
需要理解的是,SMF模块是按照现有技术中的现有流程完成对新用户面锚点和分流点(BP或UL CL)的选择的,在此不再赘述。并且,在PDU会话的用户面传输路径中,如果需要使用分流点(BP)则SMF模块在选好分流点的同时还需要为分流点(BP)分配IPv6前缀。
在选好新用户面锚点之后,便可执行步骤502。
步骤502:若分流点(BP或UL CL)发生变化,则SMF模块向目标接入网(RAN)发送分流点上行隧道端点消息。
由于步骤502与步骤402相同,故在此不再赘述。
步骤503a:SMF模块向AF模块发送第一通知。
当AF模块接收到需要进行对原用户面锚点进行更新的第一通知之后,便会对UE上下文进行传送(将UE上下文从原用户面锚点对于的原AF模块传输到新用户面锚点对应的新AF模块),并在完成传送后释放原AF模块本地保存的UE上下文。之后,原AF模块会返回第一通知的响应消息给SMF模块。
步骤503b:SMF模块接收基于第一通知的响应消息。
当SMF模块接收到可以进行路径切换的响应消息之后,SMF模块便对PDU会话的用户面进行更新。
具体的,是若分流点为UL CL分流点,则进行用户面路径切换时执行步骤504a:SMF模块向目标接入网(RAN)发送为PDU会话进行上行隧道切换的指令。
若分流点为BP分流点,则进行用户面路径切换时执行步骤504b:SMF模块向UE发送新分配的IPv6前缀及路由规则。
最后,SMF模块通知原用户面锚点及分流点进行隧道资源释放。
基于同一发明构思,本申请一实施例中提供一种用于用户面路径更新的装置,该装置的用户面路径更新方法的具体实施方式可参见方法实施例部分的描述,重复之处不再赘述,请参见图6,该装置包括:
选择单元601,用于确定需要对协议数据单元PDU会话的原用户面锚点进行更新时,选择新用户面锚点;
收发单元602,用于发送第一通知给应用层AF模块,并接收所述AF模块返回的响应所述第一通知的响应消息;其中,所述第一通知用于将需要对所述原用户面锚点进行更新的消息通知给所述AF模块;
路径更新单元603,用于若所述响应消息表明所述SMF模块可以对所述PDU会话的路径进行更新时,基于所述新用户面锚点对所述PDU会话的用户面路径进行更新。
可选的,所述收发单元602,具体用于:
若移动终端UE不在所述新用户面锚点的服务范围内,则基于所述UE的当前位置及所述新用户面锚点,确定新的分流点;
根据所述新的分流点,建立服务所述UE的接入网节点与所述新的分流点之间的用户面隧道;其中,所述UE为所述PDU会话中的UE。
可选的,所述收发单元602,还用于:
若指定应用的数据网络接入标识符DNAI发生变化,则基于所述指定用的DNAI及所述新用户面锚点,确定新的分流点;
根据所述新的分流点,建立服务所述UE的接入网节点与所述新的分流点之间的用户面隧道;其中,所述UE为所述PDU会话中的UE。
可选的,所述路径更新单元603,用于:
若所述响应信息为关于目标应用层服务器不迁移的信息,或所述响应信息为UE上下文已迁移到所述目标应用层服务器的信息,则所述响应信息表明所述SMF模块可以对所述PDU会话的路径进行更新。
可选的,所述路径更新单元603,还用于:
发送为所述UE新分配的IPv6前缀和路由规则给所述UE;其中,所述新分配的IPv6前缀和路由规则是就所述新用户面锚点获得的;
或,向所述UE的接入网或分流点发送对所述PDU会话进行隧道切换的信息。
可选的,所述第一通知,还包括:
若所述PDU会话是服务于低时延高可靠业务,则所述第一通知还包括指示所述AF模块优先对所述UE的上下文进行迁移的信息。
可选的,所述收发单元602,还用于:
所述SMF模块直接发送所述第一通知给所述AF模块;或
所述SMF模块通过网络能力开放功能模块NEF或策略控制功能PCF间接发送所述第一通知给所述AF模块。
基于同一发明构思,本申请一实施例中提供一种通信系统,该通信系统的用户面路径更新方法的具体实施方式可参见方法实施例部分的描述,重复 之处不再赘述,该装置包括:
会话管理功能SMF模块,用于在确定需要对协议数据单元PDU会话的原用户面锚点进行更新时,选择新用户面锚点;发送第一通知给应用层AF模块,并接收所述AF模块返回的响应所述第一通知的响应消息;其中,所述第一通知用于将需要对所述原用户面锚点进行更新的消息通知给所述AF模块;若所述响应消息表明所述SMF模块可以对所述PDU会话的路径进行更新时,基于所述新用户面锚点对所述PDU会话的用户面路径进行更新;
所述应用层服务器AF模块,用于接收所述SMF模块发送的所述第一通知,并对UE上下文进行传送,在传送完成之后基于所述第一通知返回所述响应信息;
用户平面功能UPF,用于接收并配置与所述用户面路径进行更新相关的隧道配置指令。
可选的,所述SMF模块,还用于:
若移动终端UE不在所述新用户面锚点的服务范围内,则SMF模块基于所述UE的当前位置及所述新用户面锚点,确定新的分流点;
根据所述新的分流点与所述新用户面锚点,为所述新的分流点分配新的上行隧道端点信息;
发送所述新的上行隧道端点信息到所述新的分流点对应的接入网。
可选的,所述SMF模块,还用于:
若指定应用的数据网络接入标识符DNAI发生变化,则基于所述指定用的DNAI及所述新用户面锚点,确定新的分流点;
根据所述新的分流点与所述新用户面锚点,为所述新的分流点分配新的上行隧道端点信息;
发送所述新的上行隧道端点信息到所述新的分流点对应的接入网。
可选的,所述UPF,具体用于:
接收所述新的上行隧道端点信息;
根据所述新的上行隧道端点信息对所述新的分流点进行上行隧道配置。
可选的,所述SMF模块,还用于:
发送为所述UE新分配的IPv6前缀和路由规则给所述UE;其中,所述新分配的IPv6前缀和路由规则是就所述新用户面锚点获得的;
或,向所述UE的接入网或分流点发送对所述PDU会话进行隧道切换的信息。
可选的,所述UPF,还用于:
接收对所述PDU会话进行隧道切换的信息。
基于同一发明构思,本申请实施例中提供了一种用于用户面路径更新的装置,包括:至少一个处理器,以及
与所述至少一个处理器连接的存储器;
其中,所述存储器存储有可被所述至少一个处理器执行的指令,所述至少一个处理器通过执行所述存储器存储的指令,执行如上所述的用户面路径更新方法。
基于同一发明构思,本申请实施例还提一种计算机可读存储介质,包括:
所述计算机可读存储介质存储有计算机指令,当所述计算机指令在计算机上运行时,使得计算机执行如上所述的用户面路径更新方法。
在本申请提供的实施例中,通过SMF模块确定需要对PDU会话的原用户面锚点进行更新时,选择新用户面锚点;并将需要对原用户面锚点进行更新的第一消息发送给AF模块,随后接收AF模块基于第一通知返回的响应消息,若响应消息表明SMF模块可以对PDU会话的路径进行更新时,则基于新用户面锚点对PDU会话的用户面路径进行更新。在锚点更新时,能够及时的对SMF模块和AF模块进行协调,减少由于PDU会话锚点的变化造成的时延及业务终端,从而提高业务的连续性。
本领域内的技术人员应明白,本申请实施例可提供为方法、系统、或计算机程序产品。因此,本申请实施例可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且,本申请实施例可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但 不限于磁盘存储器、只读光压缩盘(CD-Read-Only Memory,CD-ROM)、光学存储器等)上实施的计算机程序产品的形式。
本申请实施例是参照根据本申请实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器,使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中,使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品,该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上,使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理,从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
显然,本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的精神和范围。这样,倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内,则本申请也意图包含这些改动和变型在内。

Claims (16)

  1. 一种用户面路径更新的方法,应用于会话管理功能模块,其特征在于,包括:
    确定需要对协议数据单元会话的原用户面锚点进行更新时,选择新用户面锚点;
    发送第一通知给应用层的应用功能模块,并接收所述应用功能模块返回的响应所述第一通知的响应消息;其中,所述第一通知用于将需要对所述原用户面锚点进行更新的消息通知给所述应用功能模块;
    若所述响应消息表明所述会话管理功能模块可以对所述协议数据单元会话的路径进行更新时,基于所述新用户面锚点对所述协议数据单元会话的用户面路径进行更新。
  2. 如权利要求1所述的方法,其特征在于,发送第一通知给应用层的应用功能模块之前,还包括:
    若移动终端不在所述新用户面锚点的服务范围内,则基于所述移动终端的当前位置及所述新用户面锚点,确定新的分流点;
    根据所述新的分流点,建立服务所述移动终端的接入网节点与所述新的分流点之间的用户面隧道;其中,所述移动终端为所述协议数据单元会话中的移动终端。
  3. 如权利要求1所述的方法,其特征在于,发送第一通知给应用层的应用功能模块之前,还包括:
    若指定应用的数据网络接入标识符发生变化,则基于所述指定用的数据网络接入标识符及所述新用户面锚点,确定新的分流点;
    根据所述新的分流点,建立服务移动终端的接入网节点与新的分流点之间的用户面隧道;其中,所述移动终端为所述协议数据单元会话中的移动终端。
  4. 如权利要求1-3任一权项所述的方法,其特征在于,所述响应信息表 明所述会话管理功能模块可以对所述协议数据单元会话的路径进行更新,包括:
    若所述响应信息为关于目标应用层服务器不迁移的信息,或所述响应信息为移动终端上下文已迁移到所述目标应用层服务器的信息,则所述响应信息表明所述会话管理功能模块可以对所述协议数据单元会话的路径进行更新。
  5. 如权利要求1所述的方法,其特征在于,基于所述新用户面锚点对所述协议数据单元会话的用户面路径进行更新,包括:
    发送为所述移动终端新分配的IPv6前缀和路由规则给所述移动终端;其中,所述新分配的IPv6前缀和路由规则是根据述新用户面锚点获得的;
    或,向所述移动终端的接入网或分流点发送对所述协议数据单元会话进行隧道切换的信息。
  6. 如权利要求1所述的方法,其特征在于,所述第一通知,还包括:
    若所述协议数据单元会话是服务于低时延高可靠业务,则所述第一通知还包括指示所述应用功能模块优先对所述移动终端的上下文进行迁移的信息。
  7. 如权利要求1所述的方法,其特征在于,发送第一通知给应用层的应用功能模块,包括:
    所述会话管理功能模块直接发送所述第一通知给所述应用功能模块;或
    所述会话管理功能模块通过网络能力开放功能模块或策略控制功能模块间接发送所述第一通知给所述应用功能模块。
  8. 一种用户面路径更新的装置,应用于会话管理功能模块,其特征在于,包括:
    选择单元,用于确定需要对协议数据单元会话的原用户面锚点进行更新时,选择新用户面锚点;
    收发单元,用于发送第一通知给应用层的应用功能模块,并接收所述应用功能模块返回的响应所述第一通知的响应消息;其中,所述第一通知用于 将需要对所述原用户面锚点进行更新的消息通知给所述应用功能模块;
    路径更新单元,用于若所述响应消息表明所述会话管理功能模块可以对所述协议数据单元会话的路径进行更新时,基于所述新用户面锚点对所述协议数据单元会话的用户面路径进行更新。
  9. 如权利要求8所述的装置,其特征在于,所述收发单元,具体用于:
    若移动终端不在所述新用户面锚点的服务范围内,则基于所述移动终端的当前位置及所述新用户面锚点,确定新的分流点;
    根据所述新的分流点,建立服务所述移动终端的接入网节点与所述新的分流点之间的用户面隧道;其中,所述移动终端为所述协议数据单元会话中的移动终端。
  10. 如权利要求8所述的装置,其特征在于,所述收发单元,还用于:
    若指定应用的数据网络接入标识符发生变化,则基于所述指定用的数据网络接入标识符及所述新用户面锚点,确定新的分流点;
    根据所述新的分流点,建立服务所述移动终端的接入网节点与所述新的分流点之间的用户面隧道;其中,所述移动终端为所述协议数据单元会话中的移动终端。
  11. 如权利要求8-10任一权项所述的装置,其特征在于,所述路径更新单元,用于:
    若所述响应信息为关于目标应用层服务器不迁移的信息,或所述响应信息为移动终端上下文已迁移到所述目标应用层服务器的信息,则所述响应信息表明所述会话管理功能模块可以对所述协议数据单元会话的路径进行更新。
  12. 如权利要求8所述的装置,其特征在于,所述路径更新单元,还用于:
    发送为所述移动终端新分配的IPv6前缀和路由规则给所述移动终端;其中,所述新分配的IPv6前缀和路由规则是根据所述新用户面锚点获得的;
    或,向所述移动终端的接入网或分流点发送对所述协议数据单元会话进 行隧道切换的信息。
  13. 如权利要求8所述的装置,其特征在于,所述第一通知,还包括:
    若所述协议数据单元会话是服务于低时延高可靠业务,则所述第一通知还包括指示所述应用功能模块优先对所述移动终端的上下文进行迁移的信息。
  14. 如权利要求8所述的装置,其特征在于,所述收发单元,还用于:
    所述会话管理功能模块直接发送所述第一通知给所述应用功能模块;或
    所述会话管理功能模块通过网络能力开放功能模块或策略控制功能模块间接发送所述第一通知给所述应用功能模块。
  15. 一种用户面路径更新的装置,应用于会话管理功能模块,其特征在于,包括:
    至少一个处理器,以及
    与所述至少一个处理器连接的存储器;
    其中,所述存储器存储有可被所述至少一个处理器执行的指令,所述至少一个处理器通过执行所述存储器存储的指令,执行如权利要求1-7任一项所述的方法。
  16. 一种计算机可读存储介质,其特征在于,所述计算机可读存储介质存储有计算机指令,当所述指令在计算机上运行时,使得计算机执行如权利要求1-7任一所述的方法。
PCT/CN2019/090288 2018-06-26 2019-06-06 一种用户面路径更新的方法、装置及计算机存储介质 WO2020001253A1 (zh)

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