WO2021136485A1 - 一种通信方法及装置 - Google Patents

一种通信方法及装置 Download PDF

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Publication number
WO2021136485A1
WO2021136485A1 PCT/CN2020/142020 CN2020142020W WO2021136485A1 WO 2021136485 A1 WO2021136485 A1 WO 2021136485A1 CN 2020142020 W CN2020142020 W CN 2020142020W WO 2021136485 A1 WO2021136485 A1 WO 2021136485A1
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WO
WIPO (PCT)
Prior art keywords
network element
data
session
application server
user plane
Prior art date
Application number
PCT/CN2020/142020
Other languages
English (en)
French (fr)
Inventor
周晓云
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP20910923.0A priority Critical patent/EP4080984A4/en
Publication of WO2021136485A1 publication Critical patent/WO2021136485A1/zh
Priority to US17/854,531 priority patent/US20220337523A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/11—Allocation or use of connection identifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/24—Traffic characterised by specific attributes, e.g. priority or QoS
    • H04L47/2441—Traffic characterised by specific attributes, e.g. priority or QoS relying on flow classification, e.g. using integrated services [IntServ]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/20—Traffic policing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/24—Traffic characterised by specific attributes, e.g. priority or QoS
    • H04L47/2475—Traffic characterised by specific attributes, e.g. priority or QoS for supporting traffic characterised by the type of applications
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/14—Session management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/12—Setup of transport tunnels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/18—Service support devices; Network management devices

Definitions

  • This application relates to the field of communication technology, and in particular to a communication method and device.
  • a terminal establishes a protocol data unit (PDU) session after accessing the network, and accesses an external data network (date network, DN) through the PDU session ,
  • the application server application service, AS deployed in the data network.
  • the network can select the user plane function (UPF) of the access data network as the PDU session anchor (hereinafter referred to as the PDU session anchor) according to the network policy. Click), and access the application server through the N6 interface of PSA.
  • the application server of the same application can be deployed in multiple locations, so that the network can select an anchor point close to the terminal while supporting the terminal's access to the data network according to the terminal's access location, so as to reduce circuitous routes and reduce network delay.
  • a new application scenario is also proposed.
  • the data of some applications (for the convenience of explanation, these applications may be referred to as local applications in the future) need to pass through the application server deployed in the data network of the local area network (LAN).
  • a server of a local application such as a server deployed on a local (local) data network in a mobile edge computing (MEC) environment.
  • MEC mobile edge computing
  • the application server processes these uplink data, and the data stream carrying the uplink data processed by the first application server needs to be directed to the central PSA (also called remote PSA), and then
  • the central PSA is sent to the application server (hereinafter may be referred to as the second application server) in the central data network, and the processing of the uplink data by the first application server is realized accordingly.
  • the data stream carrying the downlink data of the local application is sent by the second application server in the central data network to the central PSA, it needs to be diverted to the local PSA through BP/UL CL and then directed to the first application server.
  • the data stream in which the data processed by the application server is located needs to be directed to the terminal, so that the downstream data processing by the first application server is realized.
  • the BP/UL CL and the local PSA are integrated. At this time, the shunt operation between the BP/UL CL and the local PSA can be omitted.
  • the first application server may cause the end of the data stream, so as to support more diverse processing methods for the data in the data stream.
  • the first application server processes the finalized data, it initiates a new data stream and carries the processed data.
  • These newly initiated data streams are two different data streams compared with the data streams before processing, and the newly initiated data streams can no longer be directed to the terminal or the application server in the data network through the local PSA.
  • This application provides a communication method and device for directing a data stream newly initiated by a local application server to a terminal or an application server in a data network.
  • this application provides a communication method, which can be implemented by a session management network element or a chip in the session management network element.
  • the session management network element is used to manage the session (such as a PDU session), and the session management network element is, for example, SMF.
  • the session management network element can determine the first policy rule and the second policy rule.
  • the first policy rule may instruct the first user plane network element to direct the first data of the first application to the first application server.
  • the second policy rule may instruct the first user plane network element to determine to send the second data of the first application to the network element associated with the first session, where the first session is used to transmit the terminal and the first session.
  • the data of the first application between two application servers, the second data comes from the first application server, the second data includes the address of the first application server, and the second data includes Including the identification information of the first session.
  • the session management network element may also send the first policy rule and the second policy rule to the first user plane network element.
  • the first policy rule includes first indication information; the first indication information is used by the first user plane network element to determine that the second indication information is carried in the first data, and the second indication The information is used by the first application server to determine that the identification information of the first session is carried in the second data; and/or the first indication information is used for the first user plane network element to determine where The second data carries identification information of the first session, and the identification information of the first session is used by the first application server to determine that the identification information of the first session is carried in the second data.
  • the session management network element can send the first policy rule and the first policy rule to the first user plane network element, so that the first user plane network element performs the following actions according to the first policy rule:
  • the data carries identification information of the first session or carries second indication information, and sends the first data to the first application server.
  • the first user plane network element performs the following actions according to the second policy rule: identify the second data that carries the identification information of the first session and is initiated by the first application server, and send the second data to the one associated with the first session
  • the network element thus sends the second data to the network element associated with the first session through the first session.
  • the network element associated with the first session can be used to send the second data to the second application server of the terminal, so that the data stream newly initiated by the local application server can be directed to the terminal or the application server in the data network.
  • the identification information of the above-mentioned first session may include an identification allocated by the first user plane network element for the first session or address information of the first session.
  • the address information of the first session may include the IPv6 address prefix (or the address corresponding to the IPv6 address prefix) IPv6 address or IPv4 address used by the terminal to access the first application.
  • the second policy rule may include the identification information of the first session, so that the first user plane network element determines to send the second data to the network element associated with the first session.
  • the session management network element may also receive third indication information from the policy control network element, where the third indication information is used to instruct the first application server to terminate the first application data flow.
  • the session management network element may carry the first indication information in the first policy rule according to the third indication information.
  • the session management network element may receive fourth indication information from the policy control network element, where the fourth indication information is used to instruct the first application server to terminate the data flow of the first application .
  • the session management network element may carry the identification information of the first session in the first policy rule according to the fourth indication information.
  • the network elements associated with the above first session may include an access network network element, a second user plane network element, a bifurcation point network element, or an uplink classifier network element of the first session.
  • the terminal accesses the wireless access network element; the second user plane network element is used to access the second application server; the bifurcation point network element is used to transfer the first data Sent to the first user plane network element; the uplink classifier network element is used to send the first data to the first user plane network element.
  • the present application provides a communication method, which can be executed by a first user plane network element or a chip in the first user plane network element.
  • the first user plane network element is used to access the data network where the first application server is located.
  • the first application server may be a local application server.
  • the first user plane network element may be UPF.
  • the first user plane network element can receive the first policy rule and the second policy rule from the session management network element.
  • the first policy rule may instruct the first user plane network element to send the first data of the first application to the first application server.
  • the second policy rule may instruct the first user plane network element to send the second data of the first application to the network element associated with the first session.
  • the first session is used to transmit all data between the terminal and the second application server.
  • the second data comes from the first application server, and the second data includes the address of the first application server.
  • the first policy rule includes first indication information, and the first indication information is used by the first user plane network element to determine to carry second indication information in the first data, and the second indication information is used for Instructing the first application server to carry the identification information of the first session in the second data; and/or, the first instruction information is used by the first user plane network element to determine that it is in the first
  • the second data carries identification information of the first session, and the identification information of the first session is used by the first application server to determine that the identification information of the first session is carried in the second data.
  • the above identification information of the first session includes the identification assigned by the first user plane network element for the first session or the address information of the first session.
  • the above second policy rule may also include identification information of the first session, and the identification information of the first session is used by the first user plane network element to determine to send the second data to the first session Associated network element.
  • the network elements associated with the above first session may include an access network network element, a second user plane network element, a bifurcation point network element, or an uplink classifier network element of the first session.
  • the terminal accesses the wireless access network element; the second user plane network element is used to access the second application server; the bifurcation point network element is used to transfer the first data Sent to the first user plane network element; the uplink classifier network element is used to send the first data to the first user plane network element.
  • the present application provides a communication method, which can be executed by a first application server or a chip in the first application server.
  • the first application server may be a local application server deployed on a local data network.
  • the first application server can receive the first data of the first application from the first user plane network element, and the first data includes the second indication information or the identification information of the first session.
  • the first application server carries the identification information of the first session in the second data according to the second indication information or the identification information of the first session, and the first session is used to transmit the first session between the terminal and the second application server.
  • An application data, the second data is determined according to the first data.
  • the first application server may also send the second data to the first user plane network element.
  • the above identification information of the first session is the identification assigned by the first user plane network element to the first session or the address information of the first session.
  • an embodiment of the present application provides a communication method, which may be executed by a session management network element or a chip in the session management network element.
  • the session management network element can receive the address of the first application server from the policy control network element.
  • the session management network element determines the first policy rule and the second policy rule.
  • the first policy rule is used to instruct the first user plane network element to direct the first data of the first application to the first application server
  • the second policy rule includes the address of the first application server
  • the address of the first application server is used by the first user plane network element to determine to send the second data to the network element associated with the first session
  • the first session is used to transmit all the information between the terminal and the second application server. Describe the data of the first application. Wherein, the second data comes from the first application server, and the second data includes the address of the first application server.
  • the session management network element may also send the first policy rule and the second policy rule to the first user plane network element.
  • the session management network element can carry the address of the first application server in the second policy rule sent to the first user plane network element for the first user plane network element to perform the following actions: identify that the first application is carried The second data of the address of the server is sent, and the second data is sent to the network element associated with the first session, so that the second data is sent to the network element associated with the first session through the first session.
  • the network element associated with the first session can be used to send the second data to the second application server of the terminal, so that the data stream newly initiated by the local application server can be directed to the terminal or the application server in the data network.
  • the network elements associated with the above first session may include an access network network element, a second user plane network element, a bifurcation point network element, or an uplink classifier network element of the first session.
  • the terminal accesses the wireless access network element; the second user plane network element is used to access the second application server; the bifurcation point network element is used to transfer the first data Sent to the first user plane network element; the uplink classifier network element is used to send the first data to the first user plane network element.
  • an embodiment of the present application provides a communication method, which may be executed by a first user plane network element or a chip in the first user plane network element.
  • the first user plane network element can receive the first policy rule and the second policy rule from the session management network element.
  • the first policy rule is used to instruct the first user plane network element to direct the first data of the first application to the first application server
  • the second policy rule includes the address of the first application server
  • the address of the first application server is used by the first user plane network element to determine to send the second data to the network element associated with the first session, and the first session is used to transmit all the information between the terminal and the second application server.
  • the second data comes from the first application server, and the second data includes the address of the first application server.
  • an embodiment of the present application provides a communication method, which can be executed by a policy control network element or a chip in the policy control network element.
  • the policy control network element is, for example, PCF.
  • the policy control network element can receive a request message from the first application function network element, the request message includes the address of the terminal and the address of the first application server, and the first application server corresponds to the first application server.
  • the first server corresponds to the first application function network element.
  • the policy control network element may determine, according to the address of the terminal, that the request message is associated with a first session, and the first session is used to transmit data of the first application between the terminal and a second application server, The second application server corresponds to the first application.
  • the policy control network element may also send the address of the first application server to the session management network element of the first session.
  • the embodiments of the present application provide a communication method.
  • the communication method can be implemented by a session management network element (or a chip in a session management network element), a first user plane network element (or a chip in a first user plane network element) ) And the first application server (or the chip in the first application server).
  • the session management network element can determine the first policy rule and the second policy rule.
  • the first policy rule may instruct the first user plane network element to direct the first data of the first application to the first application server.
  • the second policy rule may instruct the first user plane network element to determine to send the second data of the first application to the network element associated with the first session, where the first session is used to transmit the terminal and the first session.
  • the data of the first application between two application servers, the second data comes from the first application server, the second data includes the address of the first application server, and the second data includes Including the identification information of the first session.
  • the session management network element may also send the first policy rule and the second policy rule to the first user plane network element.
  • the first policy rule includes first indication information; the first indication information is used by the first user plane network element to determine that the second indication information is carried in the first data, and the second indication The information is used by the first application server to determine that the identification information of the first session is carried in the second data; and/or the first indication information is used for the first user plane network element to determine where The second data carries identification information of the first session, and the identification information of the first session is used by the first application server to determine that the identification information of the first session is carried in the second data.
  • the first user plane network element may be used to receive the first policy rule and the second policy rule.
  • the first application server may be configured to receive first data of the first application from the first user plane network element, where the first data includes second indication information or identification information of the first session.
  • the first application server carries the identification information of the first session in the second data according to the second indication information or the identification information of the first session, and the first session is used to transmit the first session between the terminal and the second application server.
  • An application data, the second data is determined according to the first data.
  • the first application server may also send the second data to the first user plane network element.
  • the embodiments of the present application provide a communication method.
  • the communication method may be a session management network element (or a chip in a session management network element), a policy control network element (or a chip in a policy control network element), and a first
  • the user plane network element or the chip in the first user plane network element executes.
  • the policy control network element can receive a request message from the first application function network element, the request message includes the address of the terminal and the address of the first application server, and the first application server corresponds to the first application server.
  • the first server corresponds to the first application function network element.
  • the policy control network element may also be used to determine that the request message is associated with a first session according to the address of the terminal, and the first session is used to transmit the first session between the terminal and the second application server.
  • Application data, the second application server corresponds to the first application.
  • the policy control network element may also be used to send the address of the first application server to the session management network element.
  • the session management network element may be used to receive the address of the first application server.
  • the session management network element may also be used to determine a first policy rule and a second policy rule; the first policy rule is used to instruct the first user plane network element to direct the first data of the first application to the second An application server; the second policy rule includes the address of the first application server, and the address of the first application server is used by the first user plane network element to determine to send second data to the first The network element associated with the session, wherein the second data comes from the first application server, and the second data includes the address of the first application server.
  • the session management network element may also send the first policy rule and the second policy rule to the first user plane network element.
  • the first user plane network element may be used to receive the first policy rule and the second policy rule.
  • an embodiment of the application provides a communication device, and an embodiment of the application provides a communication device.
  • the communication device may be used to perform the steps performed by the session management network element in the first aspect or any possible design of the first aspect.
  • the communication device can implement each function or step or operation in each of the foregoing methods in the form of a hardware structure, a software module, or a hardware structure plus a software module.
  • the communication device may be provided with functional modules corresponding to the functions or steps or operations in the foregoing methods to support the communication device to execute the foregoing methods.
  • the communication device may be a session management network element or a chip in a session management network element.
  • the communication device may include a processing module and a communication module.
  • the communication module and the processing module may be coupled with each other, where the communication module may be used to support the communication device to communicate.
  • the processing module can be used for the communication device to perform processing operations, such as generating information/messages that need to be sent, or processing received signals to obtain information/messages.
  • the above communication module can be used to perform the sending and/or receiving actions of the session management network element in the above method, such as the action of sending information, messages or signaling from the session management network element to the first user plane network element.
  • the processing module can be used to perform the processing actions of the session management network element in the above method, such as determining the first policy rule and/or the second policy rule, or controlling the communication module to receive and receive information, messages, or signaling. / Or sending, and information processing and storage operations.
  • the processing module may be used to determine the first policy rule and the second policy rule shown in the first aspect.
  • the communication module can be used to send the first policy rule and the second policy rule to the first user plane network element.
  • the communication module may be further configured to receive third indication information from the policy control network element, where the third indication information is used to instruct the first application server to terminate the data flow of the first application. Then, the processing module may be further configured to: carry the first instruction information in the first policy rule according to the third instruction information.
  • the communication module may also be configured to receive fourth indication information from the policy control network element, where the fourth indication information is used to instruct the first application server to terminate the data flow of the first application .
  • the processing module may be further configured to: carry the identification information of the first session in the first policy rule according to the fourth instruction information.
  • the communication device may include a communication interface.
  • the communication interface may be coupled with the processor, where the communication interface may be used to support the communication device to communicate.
  • the processor can be used for the communication device to perform processing operations, such as generating information/messages that need to be sent, or processing received signals to obtain information/messages.
  • the above communication interface can be used to perform the sending and/or receiving actions of the session management network element in the above method, such as the action of sending information, messages or signaling from the session management network element to the first user plane network element.
  • the processor can be used to perform the processing actions of the session management network element in the method, such as determining the first policy rule and/or the second policy rule, and controlling the communication interface to receive information, messages or signaling and or Sending, and processing and storage of information, messages or signaling.
  • the processor may be used to determine the first policy rule and the second policy rule shown in the first aspect.
  • the communication interface can be used to send the first policy rule and the second policy rule to the first user plane network element.
  • the communication interface may also be used to receive third indication information from the policy control network element, where the third indication information is used to instruct the first application server to terminate the data flow of the first application.
  • the processor may be further configured to: carry the first instruction information in the first policy rule according to the third instruction information.
  • the communication interface may also be used to receive fourth indication information from the policy control network element, where the fourth indication information is used to instruct the first application server to terminate the data flow of the first application .
  • the processor may be further configured to: carry the identification information of the first session in the first policy rule according to the fourth instruction information.
  • an embodiment of the application provides a communication device, and an embodiment of the application provides a communication device.
  • the communication device can be used to perform the steps performed by the first user plane network element in the second aspect or any possible design of the second aspect.
  • the communication device can implement each function or step or operation in each of the foregoing methods in the form of a hardware structure, a software module, or a hardware structure plus a software module.
  • the communication device may be provided with functional modules corresponding to the functions or steps or operations in the foregoing methods to support the communication device to execute the foregoing methods.
  • the communication device may be a first user plane network element or a chip in the first user plane network element.
  • the communication device may include a processing module and a communication module.
  • the communication module and the processing module may be coupled with each other, where the communication module may be used to support the communication device to communicate.
  • the processing module can be used for the communication device to perform processing operations, such as generating information/messages that need to be sent, or processing received signals to obtain information/messages.
  • the above communication module may be used to perform the sending and/or receiving actions of the first user plane network element in the above method, such as the action of receiving information, messages or signaling from the session management network element.
  • the processing module can be used to perform processing actions of the first user plane network element in the above method, such as controlling the communication module to receive and/or send information, messages or signaling, and information processing and storage.
  • the communication module may be used to receive the first policy rule and the second policy rule from the session management network element.
  • the communication device may include a communication interface.
  • the communication interface may be coupled with the processor, where the communication interface may be used to support the communication device to communicate.
  • the processor can be used for the communication device to perform processing operations, such as generating information/messages that need to be sent, or processing received signals to obtain information/messages.
  • the above communication interface can be used to perform the sending and/or receiving actions of the first user plane network element in the above method, such as the action of receiving information, messages or signaling from the session management network element.
  • the processor can be used to perform processing actions of the first user plane network element in the method, such as controlling the communication interface to receive and send information, messages, or signaling, and to process and store information, messages, or signaling. And so on.
  • the communication interface may be used to receive the first policy rule and the second policy rule from the session management network element.
  • an embodiment of the application provides a communication device, and an embodiment of the application provides a communication device.
  • the communication device may be used to execute the steps executed by the first application server in the third aspect or any possible design of the third aspect.
  • the communication device can implement each function or step or operation in each of the foregoing methods in the form of a hardware structure, a software module, or a hardware structure plus a software module.
  • the communication device may be provided with functional modules corresponding to the functions or steps or operations in the foregoing methods to support the communication device to execute the foregoing methods.
  • the communication device may be the first application server or a chip in the first application server.
  • the communication device may include a processing module and a communication module.
  • the communication module and the processing module may be coupled with each other, where the communication module may be used to support the communication device to communicate.
  • the processing module can be used for the communication device to perform processing operations, such as generating information/messages that need to be sent, or processing received signals to obtain information/messages.
  • the above communication module can be used to perform the sending and/or receiving action of the first application server in the above method, such as the action of receiving data, information, message or signaling from the first user plane network element.
  • the processing module can be used to perform processing actions of the first application server in the above method, such as controlling the communication module to receive and/or send information, messages or signaling, and information processing and storage.
  • the communication module may receive the first data of the first application from the first user plane network element, and the first data includes the second indication information or the identification information of the first session.
  • the processing module may carry the identification information of the first session in the second data according to the second indication information or the identification information of the first session.
  • the communication module may also send the second data to the first user plane network element.
  • the communication device may include a communication interface.
  • the communication interface may be coupled with the processor, where the communication interface may be used to support the communication device to communicate.
  • the processor can be used for the communication device to perform processing operations, such as generating information/messages that need to be sent, or processing received signals to obtain information/messages.
  • the above communication interface can be used to perform the sending and/or receiving action of the first application server in the above method, such as the action of receiving data, information, message or signaling from the first user plane network element.
  • the processor may be used to perform processing actions of the first application server in the above method, such as controlling the communication module to receive and/or send information, messages or signaling, and information processing and storage.
  • the communication interface may receive the first data of the first application from the first user plane network element, and the first data includes the second indication information or the identification information of the first session.
  • the processor may carry the identification information of the first session in the second data according to the second indication information or the identification information of the first session.
  • the communication interface may also send the second data to the first user plane network element.
  • an embodiment of the application provides a communication device, and an embodiment of the application provides a communication device.
  • the communication device can be used to perform the steps performed by the session management network element in the fourth aspect or any possible design of the fourth aspect.
  • the communication device can implement each function or step or operation in each of the foregoing methods in the form of a hardware structure, a software module, or a hardware structure plus a software module.
  • the communication device may be provided with functional modules corresponding to the functions or steps or operations in the foregoing methods to support the communication device to execute the foregoing methods.
  • the communication device may be a session management network element or a chip in a session management network element.
  • the communication device may include a processing module and a communication module.
  • the communication module and the processing module may be coupled with each other, where the communication module may be used to support the communication device to communicate.
  • the processing module can be used for the communication device to perform processing operations, such as generating information/messages that need to be sent, or processing received signals to obtain information/messages.
  • the above communication module can be used to perform the sending and/or receiving actions of the session management network element in the above method, for example, it is used to perform the session management network element sending information, messages or messages to the policy control network element and/or the first user plane network element.
  • the action of the order can be used to perform the processing actions of the session management network element in the above method, such as determining the first policy rule and/or the second policy rule, or controlling the communication module to receive and receive information, messages, or signaling. / Or sending, and information processing and storage operations.
  • the communication module may receive the address of the first application server from the policy control network element.
  • the session management network element determines the first policy rule and the second policy rule.
  • the communication module may also be used to send the first policy rule and the second policy rule to the first user plane network element.
  • the communication device may include a communication interface.
  • the communication interface may be coupled with the processor, where the communication interface may be used to support the communication device to communicate.
  • the processor can be used for the communication device to perform processing operations, such as generating information/messages that need to be sent, or processing received signals to obtain information/messages.
  • the above communication interface can be used to perform the sending and/or receiving actions of the session management network element in the above method, for example, it is used to perform the session management network element sending information, messages or messages to the policy control network element and/or the first user plane network element.
  • the processor can be used to perform the processing actions of the session management network element in the method, such as determining the first policy rule and/or the second policy rule, and controlling the communication interface to receive information, messages or signaling and or Sending, and processing and storage of information, messages or signaling.
  • the communication interface may receive the address of the first application server from the policy control network element.
  • the processor can be used to determine the first policy rule and the second policy rule.
  • the communication interface may also be used to send the first policy rule and the second policy rule to the first user plane network element.
  • an embodiment of the application provides a communication device, and an embodiment of the application provides a communication device.
  • the communication device can be used to perform the steps performed by the first user plane network element in the fifth aspect or any possible design of the fifth aspect.
  • the communication device can implement each function or step or operation in each of the foregoing methods in the form of a hardware structure, a software module, or a hardware structure plus a software module.
  • the communication device may be provided with functional modules corresponding to the functions or steps or operations in the foregoing methods to support the communication device to execute the foregoing methods.
  • the communication device may be a first user plane network element or a chip in the first user plane network element.
  • the communication device may include a processing module and a communication module.
  • the communication module and the processing module may be coupled with each other, where the communication module may be used to support the communication device to communicate.
  • the processing module can be used for the communication device to perform processing operations, such as generating information/messages that need to be sent, or processing received signals to obtain information/messages.
  • the above communication module may be used to perform the sending and/or receiving actions of the first user plane network element in the above method, such as the action of receiving information, messages or signaling from the session management network element.
  • the processing module can be used to perform processing actions of the first user plane network element in the above method, such as controlling the communication module to receive and/or send information, messages or signaling, and information processing and storage.
  • the communication module may be used to receive the first policy rule and the second policy rule from the session management network element.
  • the communication device may include a communication interface.
  • the communication interface may be coupled with the processor, where the communication interface may be used to support the communication device to communicate.
  • the processor can be used for the communication device to perform processing operations, such as generating information/messages that need to be sent, or processing received signals to obtain information/messages.
  • the above communication interface can be used to perform the sending and/or receiving actions of the first user plane network element in the above method, such as the action of receiving information, messages or signaling from the session management network element.
  • the processor can be used to perform processing actions of the first user plane network element in the method, such as controlling the communication interface to receive and send information, messages, or signaling, and to process and store information, messages, or signaling. And so on.
  • the communication interface may be used to receive the first policy rule and the second policy rule from the session management network element.
  • an embodiment of the application provides a communication device, and an embodiment of the application provides a communication device.
  • the communication device can be used to execute the steps executed by the policy control network element in the sixth aspect or any possible design of the sixth aspect.
  • the communication device can implement each function or step or operation in each of the foregoing methods in the form of a hardware structure, a software module, or a hardware structure plus a software module.
  • the communication device may be provided with functional modules corresponding to the functions or steps or operations in the foregoing methods to support the communication device to execute the foregoing methods.
  • the communication device may be a policy control network element or a chip in a policy control network element.
  • the communication device may include a processing module and a communication module.
  • the communication module and the processing module may be coupled with each other, where the communication module may be used to support the communication device to communicate.
  • the processing module can be used for the communication device to perform processing operations, such as generating information/messages that need to be sent, or processing received signals to obtain information/messages.
  • the above communication module can be used to perform the sending and/or receiving actions of the policy control network element in the above method, such as the action of sending information, messages or signaling from the policy control network element to the session management network element.
  • the processing module can be used to perform processing actions of the session management network element in the above method, such as controlling the communication module to receive and/or send information, messages or signaling, and information processing and storage.
  • the communication module may receive a request message from a first application function network element, the request message includes the address of the terminal and the address of the first application server, and the first application server corresponds to the first application, so The first server corresponds to the first application function network element.
  • the processing module may determine, according to the address of the terminal, that the request message is associated with a first session, and the first session is used to transmit data of the first application between the terminal and a second application server.
  • the second application server corresponds to the first application.
  • the communication module may also be used to send the address of the first application server to the session management network element.
  • the communication device may include a communication interface.
  • the communication interface may be coupled with the processor, where the communication interface may be used to support the communication device to communicate.
  • the processor can be used for the communication device to perform processing operations, such as generating information/messages that need to be sent, or processing received signals to obtain information/messages.
  • the above communication interface can be used to perform the sending and/or receiving actions of the policy control network element in the above method, such as the action of sending information, messages or signaling from the policy control network element to the session management network element.
  • the processor can be used to perform the processing actions of the session management network element in the method, such as controlling the communication interface to receive and send information, messages or signaling, and to process and store information, messages or signaling. .
  • the communication interface may receive a request message from the first application function network element, the request message includes the address of the terminal and the address of the first application server, the first application server corresponding to the first application, so The first server corresponds to the first application function network element.
  • the processor may determine, according to the address of the terminal, that the request message is associated with a first session, and the first session is used to transmit data of the first application between the terminal and a second application server.
  • the second application server corresponds to the first application.
  • the communication interface may also be used to send the address of the first application server to the session management network element.
  • an embodiment of the present application provides a communication system.
  • the system may include communication devices as shown in the ninth aspect, the tenth aspect, and the eleventh aspect.
  • an embodiment of the present application provides a communication system.
  • the system may include communication devices as shown in the twelfth aspect, the thirteenth aspect, and the fourteenth aspect.
  • an embodiment of the present application provides a computer-readable storage medium for storing a computer program or instruction.
  • the computer program or instruction When the computer program or instruction is executed, the first aspect and the first The method shown in the second aspect, the third aspect, the fourth aspect, the fifth aspect, or the sixth aspect is implemented.
  • the embodiments of the present application provide a computer program product.
  • the computer program product includes a computer program or instruction.
  • the first aspect, the second aspect, and the third aspect are executed.
  • the method shown in the aspect, the fourth aspect, the fifth aspect, or the sixth aspect is implemented.
  • the present application provides a chip and/or a chip system including the chip, and the chip may include a processor.
  • the chip executes the computer program in the memory, the method shown in the first aspect, the second aspect, the third aspect, the fourth aspect, the fifth aspect, or the sixth aspect is executed.
  • the chip system may be composed of the above-mentioned chips, or may include the above-mentioned chips and other discrete devices, such as a memory (or storage module) and/or a transceiver (or communication module).
  • Figure 1 is a schematic diagram of a local application server and a central DN application server processing application data
  • FIG. 2 is a schematic diagram of the architecture of a communication system provided by an embodiment of this application.
  • FIG. 3 is a schematic diagram of the architecture of another communication system provided by an embodiment of this application.
  • FIG. 5 is a schematic flowchart of another communication method provided by an embodiment of this application.
  • FIG. 6 is a schematic flowchart of another communication method provided by an embodiment of this application.
  • FIG. 7 is a schematic flowchart of another communication method provided by an embodiment of this application.
  • FIG. 8 is a schematic flowchart of another communication method provided by an embodiment of this application.
  • FIG. 9 is a schematic flowchart of another communication method provided by an embodiment of this application.
  • FIG. 10 is a schematic structural diagram of a communication device provided by an embodiment of this application.
  • FIG. 11 is a schematic structural diagram of another communication device provided by an embodiment of this application.
  • FIG. 12 is a schematic structural diagram of another communication device provided by an embodiment of this application.
  • FIG. 13 is a schematic structural diagram of another communication device provided by an embodiment of this application.
  • FIG. 14 is a schematic structural diagram of another communication device provided by an embodiment of this application.
  • 15 is a schematic structural diagram of another communication device provided by an embodiment of this application.
  • FIG. 16 is a schematic structural diagram of another communication device provided by an embodiment of this application.
  • FIG. 17 is a schematic structural diagram of another communication device provided by an embodiment of this application.
  • the communication method provided in the embodiment of the present application can be used in the scenario shown in FIG. 2.
  • the network architecture shown in FIG. 2 may include three parts: a terminal, a data network (DN), and an operator network.
  • a terminal may include three parts: a terminal, a data network (DN), and an operator network.
  • DN data network
  • operator network an operator network
  • the operator network can include policy control function (PCF), unified data management (unified data management, UDM), application function (AF), access and mobility management function (access and mobility management). function, AMF), session management function (session management function, SMF), (radio) access network ((radio) access network, (R) AN), and user plane function (user plane function, UPF), etc.
  • PCF policy control function
  • UDM unified data management
  • AF application function
  • access and mobility management function access and mobility management
  • function AMF
  • session management function session management function
  • SMF session management function
  • radio radio access network
  • R user plane function
  • UPF user plane function
  • the mobility management network element shown above is a control plane network element provided by the operator network, which is responsible for the access control and mobility management when the terminal accesses the operator network. It has, for example, mobility status management and assigns temporary user identities. Functions such as authentication and authorization of users.
  • the mobility management network element can be AMF.
  • future communications such as the 6th generation (6G)
  • the mobility management network element can still be AMF or have other names, which is not limited by this application .
  • the above strategy control network element is a control plane function provided by the operator to provide a PDU session strategy to the session management network element.
  • Strategies may include charging-related strategies, quality of service (QoS)-related strategies, data flow identification and orientation (or forwarding) strategies, authorization-related strategies, and the like.
  • QoS quality of service
  • the policy control network element may be PCF.
  • future communications such as 6G, the policy control network element may still be PCF or have other names, which is not limited by this application.
  • the above-mentioned session management network element is a control plane network element provided by the operator's network, and is responsible for managing the PDU session of the terminal.
  • the session management network element serves the PDU session of the terminal.
  • the PDU session is a channel used to transmit PDUs.
  • the terminal needs to transmit PDUs to each other through the PDU session and the DN.
  • SMF is responsible for the establishment, maintenance and deletion of PDU sessions.
  • SMF includes session management (such as session establishment, modification and release, including tunnel maintenance between UPF and RAN), UPF selection and control, service and session continuity (SSC) mode selection, roaming and other session related Function.
  • session management such as session establishment, modification and release, including tunnel maintenance between UPF and RAN
  • UPF selection and control including tunnel maintenance between UPF and RAN
  • SSC service and session continuity
  • SMF can be used to select the UPF that serves the user, such as selecting the UPF that is closer to the base station where the user is located, to reduce the user's packet sending and receiving delay.
  • the session management network element may be SMF.
  • the session management network element may still be SMF or have other names, which is not limited by this application.
  • the session management network element may also insert a branch point (BP) and/or an uplink classifier (UL CL) between the access network element of the terminal and the anchor point UPF as required.
  • BP branch point
  • UL CL uplink classifier
  • Each BP/UL CL can be connected to multiple UPFs to achieve business offloading. It should be understood that BP/UL CL can be implemented by UPF.
  • the above AF can be used to select, reselect, locate, and relocate the AS of the application, and interact with the core network.
  • the AF can also be a separate device independent of the AS, or the AF can also be co-located with the AS, which is not specifically limited in the present invention.
  • N1, N2, N3, N4, N5, N6, N7, N8, N9, N11, and N15 are the interface serial numbers.
  • the meaning of these interface serial numbers can be referred to the meaning defined in the relevant 3GPP standard protocols, and there is no restriction here.
  • the UE can access the DN through a PDU session managed by SMF.
  • the UE can access the data network DN1 connected to the UPF1 through a PDU session to obtain data of the application server in the data network.
  • the UE can access the data network DN2 connected to the UPF2 through the same PDU session to obtain data of the application server in the data network.
  • the multiple DNs shown in FIG. 2 can be respectively understood as the local application server and the application server of the central data network shown in FIG. 1.
  • the UPF of the data network connected to the second application server is UPF1.
  • DN2 in Figure 2 may be a local data network
  • the first application The server can be deployed on DN2 shown in Figure 2, and the first user plane network element is UPF2.
  • the local PSA and BP/UL CL shown in Figure 1 can also be set together.
  • the UPF of the data network DN4 connected to the second application server is UPF4
  • the first application server is deployed on the local data Network DN3
  • the local PSA and BP/UL CL can include UPF3 as shown in Figure 3.
  • the first user plane network element is UPF3.
  • the above DN can be a network located outside the operator's network, and the operator's network can access multiple DNs through UPF.
  • Application servers can be deployed in the DN, and each application server can correspond to one or more services to provide services such as data and/or voice to the terminal.
  • the DN in this application may be a local data network, for example, a data network deployed in a local area network such as an MEC environment.
  • DN is the private network of a smart factory.
  • the sensors installed in the workshop of the smart factory can be regarded as terminals.
  • a control server for the sensors is deployed in the DN.
  • the control server can provide services for the sensors or process sensor data.
  • the sensor can communicate with the control server, obtain instructions from the control server, and transmit the collected sensor data to the control server according to the instructions.
  • DN is a company’s internal office network.
  • the company’s employees’ mobile phones or computers can be regarded as terminals.
  • the employees’ mobile phones or computers can access information and data resources on the company’s internal office network, and can also be used by the company’s internal office network.
  • the server deployed in the process of processing the data of the employee's mobile phone or computer can be regarded as terminals.
  • the DN can also be the central DN.
  • the central DN refers to a data network that is not deployed in a local area network.
  • Service servers provided by service developers can be deployed in the center DN, such as application servers provided by software developers such as video, game, and social, to provide corresponding services to the UE.
  • the user plane network element shown above is a gateway provided by the operator for communication between the operator's network and the DN.
  • UPF network elements can have user plane-related functions such as packet routing and transmission, packet inspection, service usage reporting, quality of service (QoS) processing, lawful monitoring, upstream packet inspection, and downstream packet storage.
  • QoS quality of service
  • the user plane network element may be UPF.
  • future communications such as 6G, the user plane network element may still be UPF or have other names, which is not limited by this application.
  • the above UE can be a device with wireless transceiver function, which can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; it can also be deployed on water (such as ships, etc.); it can also be deployed in the air (such as aircraft, Balloons and satellites are classy).
  • the UE may be a mobile phone (mobile phone), a tablet computer (pad), a computer with wireless transceiver function, a virtual reality (VR) terminal, an augmented reality (AR) terminal, an industrial control (industrial control) Wireless terminals in, self-driving (self-driving) wireless terminals, wireless terminals in remote medical (remote medical), wireless terminals in smart grid (smart grid), wireless terminals in transportation safety, Wireless terminals in smart cities, wireless terminals in smart homes, etc.
  • the UE as shown in FIG. 3 may include a terminal 101.
  • the aforementioned terminal can establish a connection with the operator's network through an interface (such as N1, etc.) provided by the operator's network.
  • the terminal can also access the operator's network through the access network element to use services such as data and/or voice provided by the operator's network.
  • the terminal can also access the DN through the operator's network, and use the operator's service deployed on the DN and/or the service provided by a third party.
  • the above-mentioned third party may be a service party other than the operator's network and the terminal, and may provide other services such as data and/or voice for the terminal.
  • the specific form of expression of the above-mentioned third party can be determined according to actual application scenarios, and is not limited here.
  • An access network element refers to a device that provides a wireless communication function for a terminal, and it can be deployed in the RAN.
  • the access network elements include but are not limited to: next-generation base stations (gnodeB, gNB) in 5G, home base stations (for example, home evolved nodeB, or home nodeB, HNB), baseband units (baseBand unit, BBU), transmission Point (transmitting and receiving point, TRP), transmitting point (transmitting point, TP), mobile switching center, etc.
  • the embodiment of the present application provides a communication method for directing a data stream newly initiated by a local server deployed in a local data network to a terminal or an application server in the data network , Improve the efficiency of the business data collaborative processing process.
  • the network elements involved in the method provided in the embodiments of the present application are described.
  • the method may be implemented by the session management network element, the first user plane network element, and the first application server.
  • the implementation process of the method also involves the second user plane network element and the second application server.
  • the first application server and the second application server both correspond to the same application (hereinafter the application may be referred to as the first application), the first application server is the application server where the first application is deployed on the local DN, and the second application server It is an application server where the first application is deployed in the central DN, and both the first application server and the second application server can be used to process data corresponding to the first application.
  • the first application server may be the first application server shown in FIG. 1
  • the second application server may be the first application server shown in FIG. 1.
  • the first user plane network element may be used to access the local DN where the first application server is located, and the second user plane network element may be used to access the central DN where the second application server is located.
  • the first user plane network element is the local PSA
  • the second user plane network element is the central PSA.
  • the communication method may include the following steps:
  • the SMF determines the first policy rule and the second policy rule.
  • the first policy rule is used to instruct the first user plane network element to direct the first data of the first application to the first application server.
  • the first policy rule includes first indication information.
  • the first indication information is used by the first user plane network element to determine to carry the second indication information in the first data, and the second indication information is used to instruct the first application server to carry the identification information of the first session in the second data; and/ Or, the first indication information is used by the first user plane network element to determine that the identification information of the first session is carried in the second data, and the identification information of the first session is used by the first application server to determine that the identification information of the first session is The data carries the identification information of the first session.
  • the first session (which may be a PDU session) may be used to transmit data of the first application between the terminal and the second application server.
  • the session management network element can be used to create and manage the first session.
  • the second policy rule is used by the first user plane network element to determine to send the second data of the first application to the network element associated with the first session, where the second data comes from the first application server, and the second data includes the The address of the first application server, and the second data includes the identification information of the first session.
  • the network element associated with the first session can be used to send the second data to the second application server of the terminal.
  • the SMF sends the first policy rule and the second policy rule to the first user plane network element.
  • first policy rule and the second policy rule can be sent separately or carried in the same message, which is not specifically limited in this application.
  • the first user plane network element receives the first policy rule and the second policy rule.
  • the session management network element can send the first policy rule and the first policy rule to the first user plane network element, so that the first user plane network element performs the following actions according to the first policy rule:
  • the data carries identification information of the first session or carries second indication information, and sends the first data to the first application server.
  • the first user plane network element performs the following actions according to the second policy rule: identify the second data that carries the identification information of the first session and is initiated by the first application server, and send the second data to the one associated with the first session
  • the network element thus sends the second data to the network element associated with the first session through the first session.
  • the network element associated with the first session can be used to send the second data to the second application server of the terminal, so that the data stream newly initiated by the local application server can be directed to the terminal or the application server in the data network.
  • the above identification information of the first session may include an identification assigned by the first user plane network element for the first session (for example, a generic routing encapsulation (GRE) key) or address information of the first session.
  • the address information of the first session may include an Internet Protocol (IP) address of the terminal, such as an IPv4 address or an IPv6 address prefix (or an address corresponding to the IPv6 address prefix).
  • IP Internet Protocol
  • the IP address of the terminal may be allocated by the network when the first session is established.
  • the network can also insert BP/UL CL between the access network element (take RAN as an example) accessed by the terminal of the first session and the user plane network element of the second user, and establish respectively The tunnel between the terminal and the RAN, RAN and BP/UL CL, BU/UL CL and the second user plane network element.
  • the IP address and the tunnel endpoint identifier (TEID) may be used to indicate the endpoint at which the network element receives data.
  • the receiving endpoint of the second user plane network element receiving the uplink data sent by the BP/UL CL may be expressed as (IP address1, TEID1) in this application.
  • the SMF may determine that the data of the first application needs to be processed by the first application server, and the first application server initiates a new data stream according to the processed data. Specifically, after determining that the data of the first application needs to be processed by the first application server and the first application server initiates a new data stream based on the processed data, the SMF may execute the steps shown in S101, that is, determine the first policy rule And the second policy rule. The SMF may also select the first user plane network element after determining that the data of the first application needs to be processed by the first application server and the first application server initiates a new data stream according to the processed data.
  • the SMF may receive an instruction from the PCF.
  • the instruction it is determined that the data of the first application needs to be processed by the first application server, and the first application server initiates a new data stream based on the processed data.
  • AF can determine that the data of the first application needs to be processed by the first application server, and the first application server initiates a new data stream according to the processed data, and sends the instruction to the PCF, so that the PCF sends the instruction To SMF.
  • the instruction may be a local termination instruction.
  • the local termination indication can be used to indicate that the local application server of the application will initiate a new service data flow after terminating the service data flow.
  • the AF here is the AF corresponding to the second application server in the center DN.
  • the local termination instruction may be carried in the LAN data steering information (LAN traffic steering information) (or NEF LAN data steering information, N6 interface LAN data information, etc.) sent by the AF to the PCF.
  • the LAN data orientation information may carry local termination instructions and/or some or all of the information shown in Table 1.
  • the PCF can determine according to its own decision (for example, according to the information of the first application) that the data of the first application needs to be processed by the first application server, and the first application server Initiate a new data stream based on the processed data; alternatively, the PCF can obtain indication information through other means other than the LAN data-oriented information, so as to know that the data of the first application needs to be processed by the first application server, and the first application server is processed by the first application server. The application server initiates a new data stream based on the processed data.
  • the PCF may formulate a policy and charging control (PCC) rule according to the LAN data-oriented information, and send it to the SMF.
  • the PCC rule may include the local termination indication and/or LAN data-oriented information, and the LAN data-oriented information may include some or all of the information shown in Table 2.
  • the SMF can determine according to its own decision (for example, according to the information of the first application) that the data of the first application needs to be processed by the first application server, and the first application server Initiate a new data stream based on the processed data; or, SMF can obtain indication information through other means other than LAN data orientation information, so as to know that the data of the first application needs to be processed by the first application server, and the first application server Initiate a new data stream based on the processed data.
  • the SMF may select the first user plane network element according to the PCC rule. Specifically, after receiving the PCC rule, the SMF determines that the data of the first application needs to be processed by the first application server according to the local termination instruction, and the first application server initiates a new data stream based on the processed data. After that, the SMF The first user plane network element can be selected according to the LAN access identifier carried by the PCC rule, and the first policy rule and the second policy rule can be determined.
  • SMF can consider the current location of the terminal, select a user plane network element that supports LANAI as the first user plane network element, and insert BP/UL CL in the first session as needed to pass BP /UL CL connects to the first application server and the second application server respectively.
  • SMF can also consider the location of the second user plane network element to select the first user plane network element to avoid circuitous routes.
  • the SMF can select multiple first user plane network elements, and according to the order, multiple first user plane network elements or first user plane network elements The connected BP/UL CL are inserted into the first session respectively.
  • the SMF can assign a second IPv6 address prefix to the terminal and instruct the terminal to use the IPv6 address corresponding to the second IPv6 address prefix when accessing the first application .
  • the second IPv6 address prefix is different from the first IPv6 address prefix allocated by the network to the terminal when the terminal establishes the first session.
  • the SMF may use routing rules to instruct the terminal to use the IPv6 address corresponding to the IPv6 address prefix when accessing the first application.
  • SMF can modify BP's data flow policy rules, so that BP detects data flows whose source address is the address corresponding to the second IPv6 address prefix, and directs these data flows to the first application server.
  • the receiving end point of the first application server for receiving the data packet can be expressed as (IP address2, TEID2) in this application.
  • the SMF can modify the data flow policy rules of the UL CL so that the UL CL detects the data flow whose source address is the IPv4 address of the terminal. And send these data streams to the first application server.
  • the SMF can also instruct BP/UL CL to send uplink data from the first user plane network element to the second user plane network element.
  • the receiving endpoint of the second user plane network element to receive data from the first user plane network element may be expressed as (IP address3, TEID3) in this application. That is, for BP/UL CL, the data received by the receiving endpoint (IP address3, TEID3) needs to be sent to the receiving endpoint (IP address1, TEID1) of the second application server.
  • the SMF may send the first policy rule and the second policy rule to the first user plane network element.
  • the first policy rule and the second policy rule may respectively include a packet detection rule (PDR) and a forwarding action rule (FAR).
  • PDR packet detection rule
  • FAR forwarding action rule
  • the PDR is used to indicate the rule according to which the first user plane network element detects the data flow.
  • FAR is used to indicate what kind of processing the first user plane network element will perform on the detected data stream.
  • the PDR of the first policy rule (hereinafter may be referred to as PDR#1) can be used to instruct the first user plane network element to detect the first data.
  • the FAR of the first policy rule (hereinafter may be referred to as FAR#1) may be used to instruct the first user plane network element to direct the first data to the first application server.
  • FAR#1 may also carry first indication information to instruct the first user plane network element to carry the second indication information and/or the identification information of the first session in the second data.
  • the packet detection information (PDI) carried by PDR#1 may be as shown in Table 3.
  • the content carried by FAR#1 may be as shown in Table 4.
  • the PDR of the second policy rule (hereinafter may be referred to as PDR#2) can be used to indicate the source of the detection data of the first user plane network element, whether the data carries the address of the first application server, and whether the data carries the identification information of the first session, If all are satisfied, the data stream is the second data.
  • the FAR of the second policy rule (hereinafter may be referred to as FAR#2) can be used to instruct the first user plane network element to direct the second data to the network element associated with the first session.
  • the network element associated with the first session may include the RAN or the second user plane network element accessed by the terminal.
  • the network element associated with the first session may include BP/UL CL, where BP/UL CL is used to send the first data to the first user plane network element.
  • the PDI carried by PDR#2 may be as shown in Table 5.
  • the content carried by FAR#2 may be as shown in Table 6.
  • the transmission of the uplink data of the first application is taken as an example, and the implementation process of the communication method provided in the embodiment of the present application is exemplarily described through a flowchart.
  • the communication method provided in the embodiment of the present application may include the following steps as shown in FIG. 5:
  • S201 Establish a first session.
  • the establishment process of the first session may be initiated by the UE. Specifically, the process of establishing the first session may involve the following operations: the network selects the second user plane network element as the PSA. The network assigns an IP address to the terminal as Addr1 (which can be the first IPv6 prefix or IPv4 address). The terminal accesses the second application server of the central DN corresponding to the first application through the first session. The network inserts BP/UL CL between the RAN accessed by the terminal and the second user plane network element. Establish tunnels between the terminal and the RAN, RAN and BP/UL CL, BU/UL CL and the second user plane network element respectively. The receiving end point for the second user plane network element to receive the uplink data sent by the BP/UL CL is (IP address1, TEID1).
  • S202 The AF determines that the data in the data stream of the first application that the terminal is accessing needs to be processed by the first application server of the local area network, and the first application server initiates a new data stream according to the processed data.
  • S203 The AF sends the LAN data orientation information and the address Addr1 of the terminal to the PCF.
  • the LAN data-oriented information can carry local direct instructions and/or some or all of the information shown in Table 1 to indicate that the data in the data stream of the first application needs to be processed by the first application server of the local area network, and is processed by the first application server of the local area network.
  • the first application server initiates a new data stream according to the processed data.
  • the LAN data orientation information can be carried in the policy authorization creation (Npcf_PolicyAuthorization_Create) request message sent by the AF to the PCF.
  • Npcf_PolicyAuthorization_Create policy authorization creation
  • the policy authorization creation request message can be directly sent by the AF to the PCF, or sent by the AF to the NEF, and then forwarded by the NEF to the PCF.
  • the PCF receives the LAN data orientation information, and sends a confirmation message (also called a response message or a response message, etc.) to the AF.
  • a confirmation message also called a response message or a response message, etc.
  • the PCF authorizes the PCC rules according to the LAN data-oriented information, and formulates the PCC rules.
  • the LAN data orientation information includes spatial validity conditions and/or temporal validity conditions
  • PCC authorization is performed only when these conditions are met.
  • the PCF may carry LAN data-oriented information in the PCC rule, and the LAN data-oriented information carried in the PCC rule includes a local termination indication and/or some or all of the information shown in Table 2.
  • the SMF receives the PCC rules and sends a confirmation message to the PCF after installing the PCC rules.
  • the SMF selects the first user plane network element according to the LAN data orientation information in the PCC rule.
  • the SMF may also determine that the data stream transmitted in the first session includes the upstream data stream according to the "data identifying information" or the "direction information" in the LAN data steering information, and is used to specify steering rules for the upstream data of the first application.
  • the SMF can also assign a second IPv6 address prefix to the terminal, and send routing rules to the terminal to instruct the terminal to use the second IPv6 address prefix to access the first application . If the UL CL is inserted between the RAN and the second user plane network element, this step does not need to be performed.
  • the SMF sends an N4 session modification request to the BP/UL CL, which carries the third policy rule.
  • the third policy rule is used to instruct the BP/UL CL to send the first data to the first user plane network element.
  • the first data is uplink data of the first application.
  • the third policy rule can be used to instruct BP to identify that the source address is the first application data corresponding to the address corresponding to the second IPv6 address prefix as the first data, and the third policy rule can be used to instruct BP to send the first data to The endpoint (IP address2, TEID2) of the first user plane network element.
  • the third policy rule can be used to instruct UL CL to identify the data packet corresponding to the application identifier or the triplet of the application in the "data identification information" as the first data; and the third policy rule can be used to indicate BP Send the first data to the endpoint (IP address2, TEID2) of the first user plane network element.
  • the third policy rule can also be used to instruct BP/UL CL to send data from the first user plane network element to the receiving end point (IP address1, TEID1) of the second user plane network element.
  • SMF may also send a fourth policy rule to BP/UL CL, and the fourth policy rule instructs BP/UL CL to send data from the first user plane network element to the receiving end point (IP) of the second user plane network element. address1, TEID1).
  • the BP/UL CL can send a confirmation message to the SMF after receiving the policy rules from the SMF.
  • the SMF sends an N4 session establishment request message to the first user plane network element, which carries the first policy rule and the second policy rule.
  • the first policy rule may carry PDR#1 and FAR#1, the PDI carried by PDR#1 may be as shown in Table 3, and the content carried by FAR#1 may be as shown in Table 4.
  • the second policy rule may carry PDR#2 and FAR#2, the PDI carried by PDR#2 may be as shown in Table 5, and the content carried by FAR#2 may be as shown in Table 6.
  • the first user plane network element may send a confirmation message to the SMF.
  • the terminal when transmitting attribute data, uses the IPv6 address or IPv4 address constructed by the second IPv6 prefix to initiate interaction with the local application, and the data packet is sent by the BP/UL CL to the first user plane network element, and the first user
  • the surface network element matches the first data according to PDR#1, and executes FAR#1.
  • the first user plane network element executes the service-oriented strategy corresponding to the data routing strategy identifier, encapsulates the identification information (or second indication information) of the first session in the data packet header, and directs the first data to the first application server.
  • the first application server After the first application server receives the first data forwarded by the first user plane network element, it processes the data packet and initiates interaction with the second application server.
  • the first application server uses its own address to initiate a new data stream (ie Second data), and carry the identification information of the first session in the second data according to the identification information (or second indication information) of the first session.
  • the first application service encapsulates the identification information of the first session in the data packet header of the second data.
  • the first user plane network element sends the data packet of the second data to the BP/UL CL receiving data endpoint (IP address3, TEID3) according to the identification information of the first session, and then the BP/UL CL sends the data to the second user plane
  • IP address3, TEID3 IP address3, TEID3
  • the receiving endpoint (IP address1, TEID1) of the network element is then forwarded to the second application server.
  • the first data initiated by the second application server is sent to the BP/UL CL, and the BP/UL CL can identify the data as the data of the first application sent to the terminal according to the purpose identifier of the first data and the application identifier, so that the first data is sent to the terminal.
  • a data packet of data is sent to the first user plane network element.
  • the first user plane network element matches the first data according to PDR#1, and executes FAR#1.
  • the first user plane network element executes the service-oriented strategy corresponding to the data routing strategy identifier, encapsulates the identification information (or second indication information) of the first session in the data packet header, and directs the first data to the first application server.
  • the first application server After the first application server receives the first data forwarded by the first user plane network element, it processes the data packet and initiates interaction with the second application server.
  • the first application server uses its own address to initiate a new data stream (ie Second data), and carry the identification information of the first session in it.
  • the first user plane network element sends the data packet of the second data to the receiving data endpoint of the RAN that the terminal accesses according to the identification information of the first session, and then the BP/UL CL sends the data to the receiving endpoint of the RAN. Send data to the terminal.
  • the data packet sent by the local application server can be associated with the first session of the terminal through the first user plane network element, so that the data can be forwarded to the terminal.
  • the communication method provided in the embodiment of the present application may include the following steps as shown in FIG. 6:
  • the AF determines that the data in the data stream of the first application that the terminal is accessing needs to be processed by the first application server of the local area network, and the first application server initiates a new data stream according to the processed data.
  • the first application server is deployed in the MEC's LAN.
  • S302 AF sends LAN data orientation information to NEF.
  • the LAN data orientation information carries the external group ID (external group ID) of the terminal.
  • NEF can map the external group ID to the internal group ID (internal group ID) and carry it in the LAN data orientation information sent to the PCF.
  • the LAN data orientation information can also carry local direct instructions and/or some or all of the information shown in Table 1 to indicate that the data in the data stream of the first application needs to be processed by the first application server of the local area network, and The first application server initiates a new data stream according to the processed data.
  • the LAN data orientation information may be carried in the Nnef_TrafficInfluence_Create request message sent by the AF to the NEF.
  • NEF sends LAN data orientation information to a unified data repository (UDR) for storing the LAN data orientation information in the UDR.
  • UDR unified data repository
  • the LAN data orientation information may be carried in the data management creation request (Nudr_DM_Create) request message sent by the NEF to the UDR.
  • UDR sends a confirmation message to NEF after storing the LAN data orientation information.
  • NEF sends a confirmation message to AF.
  • the UDR sends the LAN data orientation information to the PCF that has subscribed to the change notification of the LAN data orientation information.
  • the PCF can subscribe to the UDR to notify the change of the LAN data orientation information, which is used to learn that the LAN data orientation information stored by the UDR has changed.
  • the LAN data orientation information may be carried in the data management notification (Nudr_DM_Notify) request message sent by the UDR to the PCF.
  • the PCF after receiving and storing the LAN data orientation information, the PCF sends a confirmation message to the UDR.
  • the establishment process of the first session may be initiated by the UE.
  • the process of establishing the first session may involve the following operations: the network selects the second user plane network element as the PSA.
  • the network assigns an IP address to the terminal as Addr1 (which can be the first IPv6 prefix or IPv4 address).
  • the terminal accesses the second application server of the central DN corresponding to the first application through the first session.
  • the network inserts BP/UL CL between the RAN accessed by the terminal and the second user plane network element. Establish tunnels between the terminal and the RAN, RAN and BP/UL CL, BU/UL CL and the second user plane network element respectively.
  • the receiving end point for the second user plane network element to receive the uplink data sent by the BP/UL CL is (IP address1, TEID1).
  • the SMF may establish a session management policy negotiation (SM policy association) with the PCF, and the PCF obtains the internal group identifier of the group to which the terminal belongs.
  • the PCF can also interact with the UDR to obtain the subscription information of the terminal.
  • the PCF authorizes the PCC rules according to the LAN data-oriented information, and formulates the PCC rules.
  • the PCF may perform PCC rule authorization after identifying that the LAN data orientation information is applicable to the terminal corresponding to the first session.
  • the PCF may determine that the internal group identification of the terminal is included in the internal group identification carried in the LAN data orientation information, and then determine that the LAN data orientation information is suitable for the terminal corresponding to the first session .
  • the PCF may also determine that the LAN data orientation information is applicable to the terminal corresponding to the first session.
  • the LAN data-oriented information includes spatial validity conditions and/or temporal validity conditions
  • PCC authorization is performed only if these conditions are met.
  • the PCF may carry LAN data-oriented information in the PCC rule, and the LAN data-oriented information carried in the PCC rule includes a local termination indication and/or some or all of the information shown in Table 2.
  • the SMF receives the PCC rules and sends a confirmation message to the PCF after installing the PCC rules.
  • the SMF selects the first user plane network element according to the LAN data orientation information in the PCC rule.
  • the SMF may also determine that the data stream transmitted in the first session includes the upstream data stream according to the "data identifying information" or the "direction information", and is used to specify a steering rule for the upstream data of the first application.
  • the SMF can also allocate a second IPv6 address prefix to the terminal, and send a routing rule to the terminal to instruct the terminal to use the second IPv6 address prefix to access the first application . If the UL CL is inserted between the RAN and the second user plane network element, this step does not need to be performed.
  • the SMF sends an N4 session modification request to the BP/UL CL, which carries the third policy rule.
  • the third policy rule is used to instruct the BP/UL CL to send the first data to the first user plane network element.
  • the first data is uplink data of the first application.
  • the third policy rule can be used to instruct BP to identify that the source address is the first application data corresponding to the address corresponding to the second IPv6 address prefix as the first data, and the third policy rule can be used to instruct BP to send the first data to The endpoint (IP address2, TEID2) of the first user plane network element.
  • the third policy rule can be used to instruct UL CL to identify the data packet corresponding to the application identifier or the triplet of the application in the "data identification information" as the first data, and the third policy rule can be used to indicate BP Send the first data to the endpoint (IP address2, TEID2) of the first user plane network element.
  • the third policy rule can also be used to instruct BP/UL CL to send data from the first user plane network element to the receiving end point (IP address1, TEID1) of the second user plane network element.
  • SMF may also send a fourth policy rule to BP/UL CL, and the fourth policy rule instructs BP/UL CL to send data from the first user plane network element to the receiving end point (IP) of the second user plane network element. address1, TEID1).
  • the BP/UL CL can send a confirmation message to the SMF after receiving the policy rules from the SMF.
  • the SMF sends an N4 session establishment request to the first user plane network element, which carries the first policy rule and the second policy rule.
  • the first policy rule may carry PDR#1 and FAR#1, the PDI carried by PDR#1 may be as shown in Table 3, and the content carried by FAR#1 may be as shown in Table 4.
  • the second policy rule may carry PDR#2 and FAR#2, the PDI carried by PDR#2 may be as shown in Table 5, and the content carried by FAR#2 may be as shown in Table 6.
  • the first user plane network element may send a confirmation message to the SMF.
  • the data packet sent by the first user server can be associated with the first session of the terminal through the first user plane network element, so that the processed data can be forwarded to the second application server.
  • the downlink data transmission process can be implemented in a similar manner with reference to the above process, and will not be detailed here.
  • another communication method provided by the embodiment of the present application may include the following steps as shown in FIG. 7:
  • the SMF receives the address of the first application server from the PCF.
  • the SMF determines the first policy rule and the second policy rule.
  • the first policy rule is used to instruct the first user plane network element to direct the first data of the first application to the first application server.
  • the first policy rule is used to instruct the first user plane network element to direct the first data of the first application to the first application server.
  • the second policy rule includes the address of the first application server, and the address of the first application server is used by the first user plane network element to determine to send the second data to the network element associated with the first session, or in other words, the The address of the first application server is used for the first user plane network element to determine to send the second data carrying the address of the first application server to the network element associated with the first session.
  • the first session is used to transmit data of the first application between the terminal and the second application server.
  • the second data comes from the first application server, and the second data includes the address of the first application server.
  • S403 The SMF sends the first policy rule and the second policy rule to the first user plane network element.
  • the first user plane network element receives the first policy rule and the second policy rule.
  • the first user plane network element can identify the second data from the first application server and carrying the address of the first application server according to the second policy rule, and the first user plane network element can recognize the second data according to the second policy rule The second data is identified, and the second data is sent to the network element associated with the first session, so that the second data is sent to the terminal or the second application server through the first session.
  • the address of the above first application server may include the IP address used by the first application server to interact with the second application server of the central DN.
  • the PCF may receive the address of the first application server from AF1, and after identifying that both the first application server and the second application server of the first session correspond to the first application, send the address of the first application server to SMF.
  • AF1 here is an AF corresponding to the first application server.
  • the terminal can initiate access to the first application server based on the address corresponding to the second IPv6 address prefix or the terminal’s IPv4 address, so that AF1 can obtain the terminal’s address (that is, the address corresponding to the terminal’s second IPv6 address prefix or the terminal’s IPv4 address). address).
  • AF1 may send an authorization request of PCC rules to the PCF, and carry the address of the first application server, the address of the terminal, and service request information in the authorization request.
  • the service request information may include information such as quintuple information exchanged between the terminal and the first application server, QoS request information, and AF application ID (AF app ID).
  • the PCF may compare the address of the terminal of the first session with the address of the terminal carried in the authorization request, associate the authorization request with the first session, and determine the PCC rule and the associated information of the first session. After that, the PCF can send the associated information of the first session and the PCC rules to the SMF.
  • the association information of the first session may include the correspondence between the address of the terminal, the address of the first application server, and the identification of the first application, so that the address of the first application server can be obtained by the SMF.
  • the PCC rule can be determined according to the service request information.
  • AF2 can determine that the data in the data stream of the first application that the terminal is accessing needs to be processed by the first application server of the local area network, and the first application server initiates according to the processed data
  • the address of the terminal and instructions are sent to the PCF.
  • the instructions can be used to indicate that the data in the data stream of the first application needs to be processed by the first application server of the local area network, and the first application server will process it according to the The data initiates a new data stream.
  • the indication can be a local termination indication.
  • For the sending method of the instruction please refer to the description of sending the local direct instruction in this application, which will not be repeated here.
  • AF2 may be the AF corresponding to the second application server.
  • the first policy rule may include PDR#3 and FAR#3.
  • PDR#3 can be used to instruct the first user plane network element to detect the first data.
  • FAR#3 can be used to instruct the first user plane network element to direct the first data to the first application server.
  • the PDI carried by PDR#3 can be referred to Table 3.
  • the second policy rule may include PDR#4 and FAR#4.
  • PDR#4 can be used to instruct the first user plane network element to identify the second data from the first application server and carrying the address of the first application server.
  • FAR#4 can be used to instruct the first user plane network element to send the second data to the network element associated with the first session.
  • the network element associated with the first session may include the RAN or the second user plane network element accessed by the terminal.
  • the PDI carried by PDR#4 can be referred to Table 8.
  • the transmission of the uplink data of the first application is taken as an example, and the implementation process of the communication method provided in the embodiment of the present application is exemplarily described through a flowchart.
  • the communication method provided in the embodiment of the present application may include the following steps as shown in FIG. 8:
  • S501 Establish a first session.
  • the establishment process of the first session may be initiated by the UE. Specifically, the process of establishing the first session may involve the following operations: the network selects the second user plane network element as the PSA. The network assigns an IP address to the terminal as Addr1 (which can be the first IPv6 prefix or IPv4 address). The terminal accesses the second application server of the central DN corresponding to the first application through the first session. The network inserts BP/UL CL between the RAN accessed by the terminal and the second user plane network element. Establish tunnels between the terminal and the RAN, RAN and BP/UL CL, BU/UL CL and the second user plane network element respectively. The receiving end point for the second user plane network element to receive the uplink data sent by the BP/UL CL is (IP address1, TEID1).
  • S502 AF2 determines that the data in the data stream of the first application that the terminal is accessing needs to be processed by the first application server of the local area network, and the first application server initiates a new data stream according to the processed data.
  • S503 AF2 sends the LAN data orientation information and the address Addr1 of the terminal to the PCF.
  • the LAN data orientation information can carry part or all of the information shown in Table 1 to indicate that the data in the data stream of the first application needs to be processed by the first application server of the local area network, and the first application server will process it according to The subsequent data initiates a new data stream.
  • the LAN data orientation information can be carried in the policy authorization creation request message sent by AF2 to the PCF.
  • the policy authorization creation request message can be directly sent by AF2 to PCF, or sent by AF2 to NEF, and then forwarded by NEF to PCF.
  • the PCF receives the LAN data orientation information, and sends a confirmation message (also called a response message or a response message, etc.) to the AF.
  • a confirmation message also called a response message or a response message, etc.
  • the PCF authorizes the PCC rules according to the LAN data-oriented information, and formulates the PCC rules.
  • the LAN data orientation information includes spatial validity conditions and/or temporal validity conditions
  • PCC authorization is performed only when these conditions are met.
  • the PCF may carry LAN data-oriented information in the PCC rule, and the LAN data-oriented information carried in the PCC rule includes a local termination indication and/or some or all of the information shown in Table 2.
  • the SMF receives the PCC rules and sends a confirmation message to the PCF after installing the PCC rules.
  • the SMF selects the first user plane network element according to the LAN data orientation information in the PCC rule.
  • the SMF may also determine that the data stream transmitted in the first session includes the upstream data stream according to the "data identifying information" or the "direction information" in the LAN data steering information, and is used to specify steering rules for the upstream data of the first application.
  • the SMF can also allocate a second IPv6 address prefix to the terminal, and send routing rules to the terminal to instruct the terminal to use the second IPv6 address prefix to access the first application . If the UL CL is inserted between the RAN and the second user plane network element, this step does not need to be performed.
  • S508 The SMF sends an N4 session modification request to the BP/UL CL, which carries the third policy rule.
  • the third policy rule is used to instruct the BP/UL CL to send the first data to the first user plane network element.
  • the first data is uplink data of the first application.
  • the third policy rule can be used to instruct BP to identify that the source address is the first application data corresponding to the address corresponding to the second IPv6 address prefix as the first data, and the third policy rule can be used to instruct BP to send the first data to The endpoint (IP address2, TEID2) of the first user plane network element.
  • the third policy rule can be used to instruct UL CL to identify the data packet corresponding to the application identifier in the "data identification information" as the first data, and the third policy rule can be used to instruct BP to send the first data to Endpoint of the first user plane network element (IP address2, TEID2)
  • the BP/UL CL can send a confirmation message to the SMF after receiving the policy rules from the SMF.
  • the SMF sends an N4 session establishment request to the first user plane network element, which carries the first policy rule.
  • the first policy rule may carry PDR#3 and FAR#3.
  • the first user plane network element may send a confirmation message to the SMF.
  • the terminal can use the IPv6 address or IPv4 address constructed by the second IPv6 prefix to initiate interaction with the first application server.
  • the data packets of the first application are sent to the first user plane network element by the BP/UL CL.
  • the user plane network element matches relevant data according to PDR#3, and executes FAR#3.
  • the first user plane network element executes the service-oriented strategy corresponding to the data routing strategy identifier, and directs the data flow to the first application server.
  • the first application server can process the data packet and initiate an interaction with the second application server, where the first application server uses its own address to initiate a new data stream (That is the second data).
  • AF1 sends an authorization request of the PCC rule to the PCF.
  • the authorization request carries the address of the first application server, the address of the terminal (the address corresponding to the second IPv6 prefix of the terminal or the IPv4 address of the terminal), service request information, and the like.
  • the service request information may include information such as quintuple information exchanged between the terminal and the first application server, QoS request information, and AF application identification.
  • the PCF after receiving the authorization request, the PCF sends a confirmation message to AF1.
  • the PCF compares with the address of the terminal of the first session according to the address of the terminal carried in the authorization request, determines that the authorization request is associated with the first session, and determines the PCC rule and the associated information of the first session.
  • the association information of the first session may include the correspondence between the address of the terminal, the address of the first application server, and the identification of the first application.
  • the PCC rule can be determined by the PCF according to the service request information carried in the authorization request.
  • the PCF may determine that the authorization request is associated with the first session when determining that the address of the terminal sent by AF1 is consistent with the address of the terminal managed by the first session.
  • the SMF receives the PCC rules and sends a confirmation message to the PCF after installing the PCC rules.
  • S513 The SMF sends an N4 session modification request to the first user plane network element, which carries the second policy rule.
  • the second policy rule may include PDR#4 and FAR#4.
  • the first user plane network element may send a confirmation message to the SMF.
  • S514 The SMF sends an N4 session modification request to the BP/UL CL, which carries the fourth policy rule.
  • the fourth policy rule can be used to instruct BP/UL CL to send data from the first user plane network element to the receiving end point (IP address1, TEID1) of the second user plane network element. That is, the BP/UL CL uses the tunnel established in S501 between the BP/UL CL and the second user plane network element to send the data packet from the first user plane network element.
  • the BP/UL CL can send a confirmation message to the SMF.
  • S515 The SMF sends a policy rule to the first user plane network element, where the policy rule is used to perform policy and charging control on the business data of the local application service and the central application service.
  • the policy rules are formulated according to the PCC rules issued in S510.
  • the first user plane network element sends a confirmation message to the SMF.
  • the terminal uses the IPv6 address or IPv4 address constructed by the second IPv6 prefix to initiate interaction with the first application server, and the data packet is sent by BP/UL CL to the first user plane network element, and the first user plane network element Match relevant data according to PDR#3 in the first policy rule, and execute FAR#3 in the first policy rule.
  • the first user plane network element executes the service-oriented strategy corresponding to the data routing strategy identifier, and directs the first data to the first application server.
  • the AF1 corresponding to the first application server provides the PCF with the address of the first application server and the address of the terminal.
  • the PCF sends the associated information of the first session to the SMF according to the address of the first application server and the address of the terminal, where the associated information of the first session may include the address of the terminal, the address of the first application server, and the identification of the first application Correspondence between.
  • SMF can also send a second policy rule to the first user plane network element to instruct the first user plane network element to send the data packet sent by the first application server (the source address is IP addr2) to the received data of BP/UL CL Endpoints (address3 and TEID3).
  • SMF also sends a third policy rule to BP/UL CL to instruct BP/UL CL to send the received data packet to the receiving end point (address1 and TEID1) of the second user plane network element, and then forward it to the second application server .
  • the first user plane network element can associate the data packet sent by the first application server with the first session of the terminal, so that the data can be forwarded to the second application server.
  • the first data initiated by the second application server is sent to the BP/UL CL, and the BP/UL CL can identify the data as the data of the first application sent to the terminal according to the purpose identifier of the first data and the application identifier, so that the first data is sent to the terminal.
  • a data packet of data is sent to the first user plane network element.
  • the first user plane network element matches the first data according to PDR#3, and executes FAR#3.
  • the first user plane network element executes the service-oriented strategy corresponding to the data routing strategy identifier, and directs the first data to the first application server.
  • the AF1 corresponding to the first application server provides the PCF with the address of the first application server and the address of the terminal.
  • the PCF sends the associated information of the first session to the SMF according to the address of the first application server and the address of the terminal, where the associated information of the first session may include the address of the terminal, the address of the first application server, and the identification of the first application Correspondence between.
  • SMF can also send a second policy rule to the first user plane network element to instruct the first user plane network element to send the data packet sent by the first application server (the source address is IP addr2) to the received data of BP/UL CL Endpoints (address3 and TEID3).
  • SMF also sends a third policy rule to BP/UL CL, which is used to instruct BP/UL CL to send the received data packet to the receiving data endpoint of the RAN that the terminal accesses, and then BP/UL CL sends the data to the RAN. After receiving the endpoint, the RAN can then send the data to the terminal.
  • the data packet sent by the local application server can be associated with the first session of the terminal through the first user plane network element, so that the data can be forwarded to the terminal.
  • the communication method provided in the embodiment of the present application may include the following steps as shown in FIG. 9:
  • the AF determines that the data in the data stream of the first application that the terminal is accessing needs to be processed by the first application server of the local area network, and the first application server initiates a new data stream according to the processed data.
  • the first application server is deployed in the MEC's LAN.
  • S602 AF sends LAN data orientation information to NEF.
  • the LAN data orientation information carries the external group identifier of the terminal.
  • NEF can map the external group identifier to the internal group identifier and carry it in the LAN data orientation information sent to the PCF.
  • the LAN data-oriented information can also carry part or all of the information shown in Table 1 to indicate that the data in the data stream of the first application needs to be processed by the first application server of the local area network, and the first application server is The processed data initiates a new data stream.
  • the LAN data orientation information may be carried in the traffic impact creation request message sent by the AF to the NEF.
  • the NEF sends the LAN data orientation information to the UDR for storing the LAN data orientation information in the UDR.
  • the LAN data orientation information may be carried in the data management creation request message sent by the NEF to the UDR.
  • UDR sends a confirmation message to NEF after storing the LAN data orientation information.
  • NEF sends a confirmation message to AF.
  • the UDR sends the LAN data orientation information to the PCF that has subscribed to the change notification of the LAN data orientation information.
  • the PCF can subscribe to the UDR to notify the change of the LAN data orientation information, which is used to learn that the LAN data orientation information stored by the UDR has changed.
  • the LAN data orientation information may be carried in the data management notification request message sent by the UDR to the PCF.
  • the PCF after receiving and storing the LAN data orientation information, the PCF sends a confirmation message to the UDR.
  • S606 Establish a first session.
  • the establishment process of the first session may be initiated by the UE.
  • the process of establishing the first session may involve the following operations: the network selects the second user plane network element as the PSA.
  • the network assigns an IP address to the terminal as Addr1 (which can be the first IPv6 prefix or IPv4 address).
  • the terminal accesses the second application server of the central DN corresponding to the first application through the first session.
  • the network inserts BP/UL CL between the RAN accessed by the terminal and the second user plane network element. Establish tunnels between the terminal and the RAN, RAN and BP/UL CL, BU/UL CL and the second user plane network element respectively.
  • the receiving end point for the second user plane network element to receive the uplink data sent by the BP/UL CL is (IP address1, TEID1).
  • the SMF can establish a session management policy negotiation with the PCF, and the PCF obtains the internal group identifier of the group to which the terminal belongs.
  • the PCF can also interact with the UDR to obtain the subscription information of the terminal.
  • the PCF authorizes the PCC rules according to the LAN data-oriented information, and formulates the PCC rules.
  • the PCF may perform PCC rule authorization after identifying that the LAN data orientation information is applicable to the terminal corresponding to the first session.
  • the PCF may determine that the internal group identification of the terminal is included in the internal group identification carried in the LAN data orientation information, and then determine that the LAN data orientation information is suitable for the terminal corresponding to the first session .
  • the PCF may also determine that the LAN data orientation information is applicable to the terminal corresponding to the first session.
  • the LAN data-oriented information includes spatial validity conditions and/or temporal validity conditions
  • PCC authorization is performed only if these conditions are met.
  • the PCF may carry LAN data-oriented information in the PCC rule, and the LAN data-oriented information carried in the PCC rule includes a local termination indication and/or some or all of the information shown in Table 2.
  • the SMF receives the PCC rules and sends a confirmation message to the PCF after installing the PCC rules.
  • S609 The SMF selects the first user plane network element according to the LAN data orientation information in the PCC rule.
  • the SMF may also determine that the data stream transmitted in the first session includes the upstream data stream according to the "data identifying information" or the "direction information" in the LAN data steering information, and is used to specify steering rules for the upstream data of the first application.
  • the SMF can also allocate a second IPv6 address prefix to the terminal, and send routing rules to the terminal to instruct the terminal to use the second IPv6 address prefix to access the first application . If the UL CL is inserted between the RAN and the second user plane network element, this step does not need to be performed.
  • the SMF sends an N4 session modification request to the BP/UL CL, which carries the third policy rule.
  • the third policy rule is used to instruct the BP/UL CL to send the first data to the first user plane network element.
  • the first data is uplink data of the first application.
  • the third policy rule can be used to instruct BP to identify that the source address is the first application data corresponding to the address corresponding to the second IPv6 address prefix as the first data, and the third policy rule can be used to instruct BP to send the first data to The endpoint (IP address2, TEID2) of the first user plane network element.
  • the third policy rule can be used to instruct UL CL to identify the data packet corresponding to the application identifier in the "data identification information" as the first data, and the third policy rule can be used to instruct BP to send the first data to The endpoint (IP address2, TEID2) of the first user plane network element.
  • the BP/UL CL can send a confirmation message to the SMF after receiving the policy rules from the SMF.
  • the SMF sends an N4 session establishment request to the first user plane network element, which carries the first policy rule.
  • the first policy rule may carry PDR#3 and FAR#3.
  • the first user plane network element may send a confirmation message to the SMF.
  • the terminal can use the IPv6 address or IPv4 address constructed by the second IPv6 prefix to initiate interaction with the first application server.
  • the data packets of the first application are sent to the first user plane network element by the BP/UL CL.
  • the user plane network element matches relevant data according to PDR#3, and executes FAR#3.
  • the first user plane network element executes the service-oriented strategy corresponding to the data routing strategy identifier, and directs the data flow to the first application server.
  • the first application server can process the data packet and initiate an interaction with the second application server, where the first application server uses its own address to initiate a new data stream (That is the second data).
  • S613 AF1 sends a PCC rule authorization request to the PCF.
  • the authorization request carries the address of the first application server, the address of the terminal (the address corresponding to the second IPv6 prefix of the terminal or the IPv4 address of the terminal), service request information, and the like.
  • the service request information may include information such as quintuple information exchanged between the terminal and the first application server, QoS request information, and AF application identification.
  • the PCF after receiving the authorization request, the PCF sends a confirmation message to AF1.
  • S614 The PCF compares with the address of the terminal of the first session according to the address of the terminal carried in the authorization request, determines that the authorization request is associated with the first session, and determines the PCC rule and the associated information of the first session.
  • the association information of the first session may include the correspondence between the address of the terminal, the address of the first application server, and the identification of the first application.
  • the PCC rule can be determined by the PCF according to the service request information carried in the authorization request.
  • the PCF may determine that the authorization request is associated with the first session when determining that the address of the terminal sent by AF1 is consistent with the address of the terminal managed by the first session.
  • the SMF receives the PCC rules and sends a confirmation message to the PCF after installing the PCC rules.
  • S616 The SMF sends an N4 session modification request to the first user plane network element, which carries the second policy rule.
  • the second policy rule may include PDR#4 and FAR#4.
  • the first user plane network element may send a confirmation message to the SMF.
  • the SMF sends an N4 session modification request to the BP/UL CL, which carries the fourth policy rule.
  • the fourth policy rule can be used to instruct BP/UL CL to send data from the first user plane network element to the receiving end point (IP address1, TEID1) of the second user plane network element. That is, the BP/UL CL uses the tunnel established in S501 between the BP/UL CL and the second user plane network element to send the data packet from the first user plane network element.
  • the BP/UL CL can send a confirmation message to the SMF.
  • S618 The SMF sends a policy rule to the first user plane network element, where the policy rule is used to perform policy and charging control on the business data of the local application service and the central application service.
  • the policy rules are formulated according to the PCC rules issued in S510.
  • the first user plane network element sends a confirmation message to the SMF.
  • the data packet sent by the first user server can be associated with the first session of the terminal through the first user plane network element, so that the processed data can be forwarded to the second application server.
  • the downlink data transmission process can be implemented in a similar manner with reference to the foregoing process, and no further details will be carried out here to save space.
  • the method provided by the embodiment of this application is performed from the perspective of the functions implemented by the session management network element, the first user plane network element, the first application server, and the policy control network element.
  • the network device, the first communication device, the second communication device, and the third communication device may include a hardware structure and/or a software module, and a hardware structure, a software module, or
  • the above-mentioned functions are realized in the form of hardware structure and software modules. Whether a certain function among the above-mentioned functions is executed by a hardware structure, a software module, or a hardware structure plus a software module depends on the specific application and design constraint conditions of the technical solution.
  • a communication device may include a communication module 1001 and a processing module 1002, and the communication module 1001 and the processing module 1002 are coupled with each other.
  • the communication device 1000 can be used to perform the steps performed by the session management network element shown in FIG. 4, FIG. 5, FIG. 6, FIG. 7, FIG. 8, and FIG. 9 above.
  • the communication module 1001 can be used to support the communication device 1000 to communicate.
  • the communication module 1001 can also be called a communication unit, a communication interface, a transceiver module or a transceiver unit.
  • the communication module 1001 may have a wireless communication function, such as being able to communicate with other communication devices through wireless communication.
  • the processing module 1002 may also be referred to as a processing unit, and may be used to support the communication device 1000 to perform the processing actions of the session management network element in the foregoing method embodiment, including but not limited to: generating information, messages, and/or messages sent by the communication module 1001 Or, demodulate and decode the signal received by the communication module 1001 and so on.
  • the above processing module 1002 can be used to determine the first policy rule and the second policy shown in the first aspect. rule.
  • the communication module 1001 may be used to send the first policy rule and the second policy rule to the first user plane network element.
  • the communication module 1001 may also be used to receive third indication information from a policy control network element, where the third indication information is used to instruct the first application server to terminate the data flow of the first application .
  • the processing module 1002 may be further configured to: carry the first instruction information in the first policy rule according to the third instruction information.
  • the communication module 1001 may also be configured to receive fourth indication information from the policy control network element, where the fourth indication information is used to instruct the first application server to terminate the data of the first application flow. Then, the processing module 1002 may be further configured to: carry the identification information of the first session in the first policy rule according to the fourth instruction information.
  • the above communication module 1001 may receive the address of the first application server from the policy control network element.
  • the processing module 1002 can be used to determine the first policy rule and the second policy rule.
  • the communication module 1001 may also be configured to send the first policy rule and the second policy rule to the first user plane network element.
  • the communication device 1100 may include a communication interface 1101, a memory 1102, and a processor 1103.
  • the communication interface 1101 can be used for communication with a communication device, for example, for sending or receiving signals.
  • the memory 1102 is coupled with the processor 1103, and is used to store programs and data necessary for the communication device 1100 to implement various functions.
  • the processor 1103 is configured to support the communication device 1100 to perform the processing functions performed by the session management network element in the above method, such as determining to generate information and messages sent by the communication interface 1101, and/or perform processing on the signals received by the communication interface 1101 Demodulation and decoding and so on.
  • the above memory 1102 and the processor 1103 may be integrated or independent of each other.
  • the communication interface 1101 may be a wireless communication interface (or called a wireless transceiver), which may be used to support the communication device 1100 to receive and send signaling and/or data through a wireless air interface.
  • the communication interface may also be a communication port, such as a communication port (or interface) used for communication between network elements.
  • the communication interface 1101 may also be referred to as a transceiving unit or a communication unit.
  • the processor 1103 can be implemented by a processing chip or a processing circuit.
  • the above communication interface 1101 can be used to execute the steps executed by the communication module 1001, and the processor 1103 can call a program in the memory 1102 to execute the above steps executed by the processing module 1002.
  • the above processor 1103 may be used to determine the first policy rule and the second policy shown in the first aspect. rule.
  • the communication interface 1101 may be used to send the first policy rule and the second policy rule to the first user plane network element.
  • the communication interface 1101 may also be used to receive third indication information from the policy control network element, where the third indication information is used to instruct the first application server to terminate the data flow of the first application . Then the processor 1103 may also be configured to: carry the first indication information in the first policy rule according to the third indication information.
  • the communication interface 1101 may also be used to receive fourth indication information from the policy control network element, where the fourth indication information is used to instruct the first application server to terminate the data of the first application flow. Then, the processor 1103 may be further configured to: carry the identification information of the first session in the first policy rule according to the fourth instruction information.
  • the above communication interface 1101 may receive the address of the first application server from the policy control network element.
  • the processor 1103 may be used to determine the first policy rule and the second policy rule.
  • the communication interface 1101 may also be used to send the first policy rule and the second policy rule to the first user plane network element.
  • a communication device may include a communication module 1201 and a processing module 1202, and the communication module 1201 and the processing module 1202 are coupled with each other.
  • the communication device 1200 can be used to perform the steps performed by the first user plane network element shown in FIG. 4, FIG. 5, FIG. 6, FIG. 7, FIG. 8, and FIG. 9 above.
  • the communication module 1201 can be used to support the communication device 1200 to communicate.
  • the communication module 1201 can also be referred to as a communication unit, a communication interface, a transceiver module or a transceiver unit.
  • the communication module 1201 may have a wireless communication function, such as being able to communicate with other communication devices through wireless communication.
  • the processing module 1202 may also be referred to as a processing unit, and may be used to support the communication device 1200 to perform the processing actions of the first user plane network element in the foregoing method embodiment, including but not limited to: generating information and messages sent by the communication module 1201, And/or, demodulate and decode the signal received by the communication module 1201 and so on.
  • FIG. 5 when performing the steps performed by the first user plane network element in FIG. 4, FIG. 5, FIG. 6, FIG. 7, FIG. 8 and FIG. Manage the first policy rule and the second policy rule of the network element.
  • the communication device 1300 may include a communication interface 1301, a memory 1302, and a processor 1303.
  • the communication interface 1301 may be used for communication with a communication device, for example, for sending or receiving signals.
  • the memory 1302 is coupled with the processor 1303, and is used to store programs and data necessary for the communication device 1300 to implement various functions.
  • the processor 1303 is configured to support the communication device 1300 to perform the processing functions performed by the first user plane network element in the above-mentioned method, such as determining to generate information, messages sent by the communication interface 1301, and/or information received by the communication interface 1301
  • the signal is demodulated and decoded and so on.
  • the above memory 1302 and the processor 1303 may be integrated or independent of each other.
  • the communication interface 1301 may be a wireless communication interface (or called a wireless transceiver), which may be used to support the communication device 1300 to receive and send signaling and/or data through a wireless air interface.
  • the communication interface may also be a communication port, such as a communication port (or interface) used for communication between network elements.
  • the communication interface 1301 may also be referred to as a transceiving unit or a communication unit.
  • the processor 1303 can be implemented by a processing chip or a processing circuit.
  • FIG. 5 when performing the steps performed by the first user plane network element in FIG. 4, FIG. 5, FIG. 6, FIG. 7, FIG. 8 and FIG. Manage the first policy rule and the second policy rule of the network element.
  • a communication device may include a communication module 1401 and a processing module 1402, and the communication module 1401 and the processing module 1402 are coupled with each other.
  • the communication device 1400 can be used to execute the steps performed by the first application server shown in FIG. 4, FIG. 5, and FIG. 6 above.
  • the communication module 1401 may be used to support the communication device 1400 to communicate.
  • the communication module 1401 may also be called a communication unit, a communication interface, a transceiver module or a transceiver unit.
  • the communication module 1401 may have a wireless communication function, such as being able to communicate with other communication devices through wireless communication.
  • the processing module 1402 can also be referred to as a processing unit, and can be used to support the communication device 1400 to perform the processing actions of the first application server in the foregoing method embodiments, including but not limited to: generating information, messages, and/or messages sent by the communication module 1401 Or, demodulate and decode the signal received by the communication module 1401 and so on.
  • the above communication module 1401 may be used to receive the first application of the first user plane network element.
  • the first data includes second indication information or identification information of the first session.
  • the processing module 1402 may carry the identification information of the first session in the second data according to the second indication information or the identification information of the first session.
  • the communication module 1401 may also send the second data to the first user plane network element.
  • the communication device 1500 may include a communication interface 1501, a memory 1502, and a processor 1503.
  • the communication interface 1501 may be used for communication with a communication device, for example, for sending or receiving signals.
  • the memory 1502 is coupled with the processor 1503, and is used to store programs and data necessary for the communication device 1500 to implement various functions.
  • the processor 1503 is configured to support the communication device 1500 to perform the processing functions performed by the first application server in the above-mentioned method, such as determining to generate information and messages sent by the communication interface 1501, and/or to perform processing on the signals received by the communication interface 1501 Demodulation and decoding and so on.
  • the above memory 1502 and the processor 1503 may be integrated or independent of each other.
  • the communication interface 1501 may be a wireless communication interface (or called a wireless transceiver), which may be used to support the communication device 1500 to receive and send signaling and/or data through a wireless air interface.
  • the communication interface may also be a communication port, such as a communication port (or interface) used for communication between network elements.
  • the communication interface 1501 may also be referred to as a transceiving unit or a communication unit.
  • the processor 1503 can be implemented by a processing chip or a processing circuit.
  • the above communication interface 1501 can be used to receive the first data of the first application from the first user plane network element ,
  • the first data includes second indication information or identification information of the first session.
  • the processor 1503 may carry the identification information of the first session in the second data according to the second indication information or the identification information of the first session.
  • the communication interface 1501 may also send the second data to the first user plane network element.
  • a communication device may include a communication module 1601 and a processing module 1602, and the communication module 1601 and the processing module 1602 are coupled with each other.
  • the communication device 1600 can be used to execute the steps performed by the policy control network element shown in FIG. 7, FIG. 8, and FIG. 9 above.
  • the communication module 1601 can be used to support the communication device 1600 to communicate.
  • the communication module 1601 can also be referred to as a communication unit, a communication interface, a transceiver module, or a transceiver unit.
  • the communication module 1601 may have a wireless communication function, such as being able to communicate with other communication devices through wireless communication.
  • the processing module 1602 can also be referred to as a processing unit, and can be used to support the communication device 1600 to execute the processing actions of the policy control network element in the foregoing method embodiment, including but not limited to: generating information, messages, and/or sent by the communication module 1601 Or, demodulate and decode the signal received by the communication module 1601 and so on.
  • the above communication module 1601 may be used to receive a request message from the first application function network element
  • the request message includes the address of the terminal and the address of a first application server, the first application server corresponds to the first application, and the first server corresponds to the first application function network element.
  • the processing module 1602 may determine that the request message is associated with the first session according to the address of the terminal, and the first session is used to transmit the data of the first application between the terminal and the second application server, so The second application server corresponds to the first application.
  • the communication module 1601 may also be configured to send the address of the first application server to the session management network element.
  • the communication device 1700 may include a communication interface 1701, a memory 1702, and a processor 1703.
  • the communication interface 1701 can be used for communication with a communication device, for example, for sending or receiving signals.
  • the memory 1702 is coupled with the processor 1703, and is used to store programs and data necessary for the communication device 1700 to implement various functions.
  • the processor 1703 is configured to support the communication device 1700 to perform the processing functions performed by the policy control network element in the foregoing method, such as determining to generate information and messages sent by the communication interface 1701, and/or to perform processing on the signals received by the communication interface 1701 Demodulation and decoding and so on.
  • the above memory 1702 and the processor 1703 may be integrated or independent of each other.
  • the communication interface 1701 may be a wireless communication interface (or called a wireless transceiver), which may be used to support the communication device 1700 to receive and send signaling and/or data through a wireless air interface.
  • the communication interface may also be a communication port, such as a communication port (or interface) used for communication between network elements.
  • the communication interface 1701 may also be referred to as a transceiving unit or a communication unit.
  • the processor 1703 can be implemented by a processing chip or a processing circuit.
  • the above communication interface 1701 may be used to receive a request message from the first application function network element.
  • the message includes the address of the terminal and the address of the first application server, the first application server corresponding to the first application, and the first server corresponding to the first application function network element.
  • the processor 1703 may determine, according to the address of the terminal, that the request message is associated with a first session, and the first session is used to transmit data of the first application between the terminal and a second application server.
  • the second application server corresponds to the first application.
  • the communication interface 1701 may also be used to send the address of the first application server to the session management network element.
  • the embodiment of the present application also provides a computer-readable storage medium on which a computer program (or instruction) is stored.
  • a computer program or instruction
  • the computer executes the above method.
  • this application also provides a computer program product, which when invoked and executed by a computer, enables the computer to implement the above method embodiment and any possible implementation of the method embodiment Operations performed by the session management network element, the first user plane network element, the first application server, and/or the policy control network element.
  • this application also provides a chip or chip system, which is coupled with a transceiver, and is used to implement the above method embodiment and any one of the possible implementations of the method embodiment is managed by the session. Operations performed by the network element, the first user plane network element, the first application server, and/or the policy control network element.
  • the chip system may include the chip and components such as memory and communication interface.
  • this application also provides a communication system that can be used to implement the above method embodiment and any possible implementation of the method embodiment.
  • the session management network element, the first user The operations performed by the plane network element, the first application server, and/or the policy control network element.
  • the communication system has a structure as shown in any one of FIGS. 1 to 3.
  • this application can be provided as methods, systems, or computer program products. Therefore, this application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, this application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.
  • computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • These computer program instructions can also be stored in a computer-readable memory that can guide a computer or other programmable data processing equipment to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction device.
  • the device implements the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.
  • These computer program instructions can also be loaded on a computer or other programmable data processing equipment, so that a series of operation steps are executed on the computer or other programmable equipment to produce computer-implemented processing, so as to execute on the computer or other programmable equipment.
  • the instructions provide steps for implementing the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

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Abstract

本申请提供一种通信方法及装置，可由会话管理网元向第一用户面网元发送第一策略规则以及第二策略规则，使得第一用户面网元根据第一策略规则执行以下动作：在第一应用的第一数据中携带第一会话的标识信息或携带第二指示信息，并将第一数据发送至第一应用服务器。以及使得第一用户面网元根据第二策略规则执行以下动作：识别携带有第一会话的标识信息且由第一应用服务器发起的第二数据，并将第二数据发送至第一会话关联的网元，从而通过第一会话将第二数据发送至第一会话关联的网元。第一会话关联的网元可用于将第二数据发送至终端或第二应用服务器，因此实现将本地应用服务器新发起的数据流导向至终端或数据网络中的应用服务器。

Description

一种通信方法及装置
相关申请的交叉引用
本申请要求在2019年12月31日提交中国专利局、申请号为201911418087.3、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。
技术领域
本申请涉及通信技术领域，尤其涉及一种通信方法及装置。
背景技术
在第五代移动通信(5th generation，5G)系统中，终端(UE)接入网络后建立协议数据单元(protocol data unit，PDU)会话，并通过PDU会话访问外部数据网络(date network，DN)，与部署在数据网络中的应用服务器(application service，AS)交互。根据用户访问的数据不同，网络可以根据网络策略选择接入数据网络的用户面功能(user plane function，UPF)作为协议数据单元锚点(PDU session anchor)(以下可简称协议数据单元锚点为锚点)，并通过PSA的N6接口访问应用服务器。同一个应用的应用服务器可以部署在多个位置，这样网络就能够根据终端的接入位置，选择靠近终端同时又能支持终端访问数据网络的锚点，以便减少路由迂回，降低网络延迟。
目前还提出了一种新的应用场景，某些应用(为方便说明，后续可将这些应用称为本地应用)的数据需要经过部署于局域网(local area network，LAN)的数据网络中的应用服务器的处理，本地应用的服务器例如移动边缘计算(mobile edge compute，MEC)环境中部署于本地(local)数据网络的服务器。如图1所示，携带本地应用的上行数据的数据流在由终端发送后，需经过分叉点(branchpoint)或上行分类器(uplinkclassifier)分流至本地PSA后再导向至本地局域网中的应用服务器(以下可称为第一应用服务器或本地应用服务器)，由应用服务器处理这些上行数据，携带经过第一应用服务器处理的上行数据的数据流需要被导向至中心PSA(也称remote PSA)，进而由中心PSA发送至中心(central)数据网络中的应用服务器(以下可称为第二应用服务器)，据此实现第一应用服务器对上行数据的处理。此外，携带本地应用的下行数据的数据流在由中心数据网络中的第二应用服务器发送至中心PSA后，需经过BP/UL CL分流至本地PSA再导向至第一应用服务器，携带经过第一应用服务器处理的数据所在的数据流需要导向至终端，据此实现第一应用服务器对下行数据的处理。在有些场景下，BP/UL CL和本地PSA合一，此时BP/UL CL和本地PSA之间的分流操作可以省去。
该场景下，第一应用服务器接收对来自本地PSA的数据流后，可能会导致该数据流的终结，以支持对该数据流中的数据进行更加多样的处理方式。第一应用服务器在处理终结的数据后，会发起新的数据流，并携带经过处理的数据。这些新发起的数据流与处理前的数据流相比是两个不同的数据流，无法再通过本地PSA将新发起的数据流导向至终端或数据网络中的应用服务器。
发明内容
本申请提供一种通信方法及装置，用以将本地应用服务器新发起的数据流导向至终端或数据网络中的应用服务器。
第一方面，本申请提供一种通信方法，该通信方法可由会话管理网元或会话管理网元中的芯片实施。其中，会话管理网元用于进行会话(如PDU会话)的管理，会话管理网元例如SMF。
根据该方法，会话管理网元可确定第一策略规则和第二策略规则。其中，所述第一策略规则可指示第一用户面网元将第一应用的第一数据导向至第一应用服务器。所述第二策略规则可指示所述第一用户面网元确定将所述第一应用的第二数据发送至第一会话关联的网元，其中，所述第一会话用于传输终端与第二应用服务器之间的所述第一应用的数据，所述第二数据来自于所述第一应用服务器，所述第二数据中包括所述第一应用服务器的地址，所述第二数据中包括所述第一会话的标识信息。会话管理网元还可向所述第一用户面网元发送所述第一策略规则以及所述第二策略规则。
其中，所述第一策略规则中包括第一指示信息；所述第一指示信息用于所述第一用户面网元确定在所述第一数据中携带第二指示信息，所述第二指示信息用于所述第一应用服务器确定在所述第二数据中携带所述第一会话的标识信息；和/或，所述第一指示信息用于所述第一用户面网元确定在所述第二数据中携带所述第一会话的标识信息，所述第一会话的标识信息用于所述第一应用服务器确定在所述第二数据中携带所述第一会话的标识信息。
采用以上方法，可由会话管理网元向第一用户面网元发送第一策略规则以及第一策略规则，使得第一用户面网元根据第一策略规则执行以下动作：在第一应用的第一数据中携带第一会话的标识信息或携带第二指示信息，并将第一数据发送至第一应用服务器。以及使得第一用户面网元根据第二策略规则执行以下动作：识别携带有第一会话的标识信息且由第一应用服务器发起的第二数据，并将第二数据发送至第一会话关联的网元，从而通过第一会话将第二数据发送至第一会话关联的网元。第一会话关联的网元可用于将第二数据发送至终端会第二应用服务器，因此实现将本地应用服务器新发起的数据流导向至终端或数据网络中的应用服务器。
上述第一会话的标识信息可包括所述第一用户面网元为所述第一会话分配的标识或所述第一会话的地址信息。其中，第一会话的地址信息可包括终端访问第一应用所采用的IPv6地址前缀(或IPv6地址前缀对应的地址)IPv6地址或IPv4地址。
示例性的，第二策略规则中可包括所述第一会话的标识信息，以使所述第一用户面网元确定将所述第二数据发送至所述第一会话关联的网元。
在一种可能的示例中，所述会话管理网元还可接收来自策略控制网元的第三指示信息，所述第三指示信息用于指示所述第一应用服务器终结所述第一应用的数据流。会话管理网元可根据所述第三指示信息在所述第一策略规则中携带所述第一指示信息。
在另一种可能的示例中，会话管理网元可接收来自策略控制网元的第四指示信息，所述第四指示信息用于指示所述第一应用服务器终结所述第一应用的数据流。所述会话管理网元可根据所述第四指示信息在所述第一策略规则中携带所述第一会话的标识信息。
以上第一会话关联的网元可包括第一会话的接入网网元、第二用户面网元、分叉点网元或者上行分类器网元。其中，所述终端接入所述无线接入网网元；所述第二用户面网元 用于接入所述第二应用服务器；所述分叉点网元用于将所述第一数据发送至所述第一用户面网元；所述上行分类器网元用于将所述第一数据发送至所述第一用户面网元。
第二方面，本申请提供一种通信方法，该通信方法可由第一用户面网元或第一用户面网元中的芯片执行。其中，第一用户面网元用于接入第一应用服务器所在的数据网络。第一应用服务器可以是一个本地应用服务器。第一用户面网元可以是UPF。
根据该方法，第一用户面网元可接收来自会话管理网元的第一策略规则以及第二策略规则。其中，第一策略规则可指示所述第一用户面网元将所述第一应用的第一数据发送至第一应用服务器。第二策略规则可指示第一用户面网元将所述第一应用的第二数据发送至第一会话关联的网元，所述第一会话用于传输终端与第二应用服务器之间的所述第一应用的数据，其中，所述第二数据来自于所述第一应用服务器，所述第二数据中包括所述第一应用服务器的地址。
所述第一策略规则中包括第一指示信息，所述第一指示信息用于所述第一用户面网元确定在所述第一数据中携带第二指示信息，所述第二指示信息用于指示所述第一应用服务器在所述第二数据中携带所述第一会话的标识信息；和/或，所述第一指示信息用于所述第一用户面网元确定在所述第二数据中携带所述第一会话的标识信息，所述第一会话的标识信息用于所述第一应用服务器确定在所述第二数据中携带所述第一会话的标识信息。
以上第一会话的标识信息包括所述第一用户面网元为所述第一会话分配的标识或所述第一会话的地址信息。
以上第二策略规则中还可包括所述第一会话的标识信息，所述第一会话的标识信息用于所述第一用户面网元确定将所述第二数据发送至所述第一会话关联的网元。
以上第一会话关联的网元可包括第一会话的接入网网元、第二用户面网元、分叉点网元或者上行分类器网元。其中，所述终端接入所述无线接入网网元；所述第二用户面网元用于接入所述第二应用服务器；所述分叉点网元用于将所述第一数据发送至所述第一用户面网元；所述上行分类器网元用于将所述第一数据发送至所述第一用户面网元。
以上第二方面所示通信方法的有益效果，可参见第一方面中对于通信方法的有益效果的描述。
第三方面，本申请提供一种通信方法，该通信方法可由第一应用服务器或第一应用服务器中的芯片执行。其中，第一应用服务器可以是一个部署于本地数据网络的本地应用服务器。
根据该方法，第一应用服务器可接收来自第一用户面网元的第一应用的第一数据，所述第一数据中包括第二指示信息或第一会话的标识信息。第一应用服务器根据第二指示信息或第一会话的标识信息，在第二数据中携带第一会话的标识信息，所述第一会话用于传输终端与第二应用服务器之间的所述第一应用的数据，所述第二数据根据所述第一数据确定。第一应用服务器还可向所述第一用户面网元发送向所述第二数据。
以上第一会话的标识信息为所述第一用户面网元为所述第一会话分配的标识或所述第一会话的地址信息。
以上第三方面所示通信方法的有益效果，可参见第一方面中对于通信方法的有益效果的描述。
第四方面，本申请实施例提供一种通信方法，该通信方法可由会话管理网元或会话管 理网元中的芯片执行。
根据该方法，会话管理网元可接收来自策略控制网元的第一应用服务器的地址。会话管理网元确定第一策略规则和第二策略规则。所述第一策略规则用于指示第一用户面网元将所述第一应用的第一数据导向至第一应用服务器，所述第二策略规则中包括所述第一应用服务器的地址，所述第一应用服务器的地址用于所述第一用户面网元确定将第二数据发送至第一会话关联的网元，所述第一会话用于传输终端与第二应用服务器之间的所述第一应用的数据。其中，所述第二数据来自于所述第一应用服务器，且所述第二数据中包括所述第一应用服务器的地址。所述会话管理网元还可向所述第一用户面网元发送所述第一策略规则以及所述第二策略规则。
采用以上方法，可由会话管理网元在发送至第一用户面网元的第二策略规则中携带第一应用服务器的地址，用于第一用户面网元执行以下动作：识别携带有第一应用服务器的地址的第二数据，并将第二数据发送至第一会话关联的网元，从而通过第一会话将第二数据发送至第一会话关联的网元。第一会话关联的网元可用于将第二数据发送至终端会第二应用服务器，因此实现将本地应用服务器新发起的数据流导向至终端或数据网络中的应用服务器。
以上第一会话关联的网元可包括第一会话的接入网网元、第二用户面网元、分叉点网元或者上行分类器网元。其中，所述终端接入所述无线接入网网元；所述第二用户面网元用于接入所述第二应用服务器；所述分叉点网元用于将所述第一数据发送至所述第一用户面网元；所述上行分类器网元用于将所述第一数据发送至所述第一用户面网元。
第五方面，本申请实施例提供一种通信方法，该通信方法可由第一用户面网元或第一用户面网元中的芯片执行。
根据该方法，第一用户面网元可接收来自会话管理网元的第一策略规则和第二策略规则。所述第一策略规则用于指示第一用户面网元将所述第一应用的第一数据导向至第一应用服务器，所述第二策略规则中包括所述第一应用服务器的地址，所述第一应用服务器的地址用于所述第一用户面网元确定将第二数据发送至第一会话关联的网元，所述第一会话用于传输终端与第二应用服务器之间的所述第一应用的数据。其中，所述第二数据来自于所述第一应用服务器，且所述第二数据中包括所述第一应用服务器的地址。
以上第五方面所示通信方法的有益效果，可参见第四方面中对于通信方法的有益效果的描述。
第六方面，本申请实施例提供一种通信方法，该通信方法可由策略控制网元或策略控制网元中的芯片执行。其中，策略控制网元例如是PCF。
根据该方法，策略控制网元可接收来自第一应用功能网元的请求消息，所述请求消息中包括终端的地址以及第一应用服务器的地址，所述第一应用服务器对应于所述第一应用，所述第一服务器与所述第一应用功能网元对应。策略控制网元可根据所述终端的地址，确定所述请求消息与第一会话关联，所述第一会话用于传输所述终端与第二应用服务器之间的所述第一应用的数据，所述第二应用服务器对应于所述第一应用。所述策略控制网元还可向所述第一会话的会话管理网元发送所述第一应用服务器的地址。
以上第六方面所示通信方法的有益效果，可参见第四方面中对于通信方法的有益效果的描述。
第七方面，本申请实施例提供一种通信方法，该通信方法可由会话管理网元(或会话 管理网元中的芯片)、第一用户面网元(或第一用户面网元中的芯片)以及第一应用服务器(或第一应用服务器中的芯片)执行。
根据该方法，会话管理网元可确定第一策略规则和第二策略规则。其中，所述第一策略规则可指示第一用户面网元将第一应用的第一数据导向至第一应用服务器。所述第二策略规则可指示所述第一用户面网元确定将所述第一应用的第二数据发送至第一会话关联的网元，其中，所述第一会话用于传输终端与第二应用服务器之间的所述第一应用的数据，所述第二数据来自于所述第一应用服务器，所述第二数据中包括所述第一应用服务器的地址，所述第二数据中包括所述第一会话的标识信息。会话管理网元还可向所述第一用户面网元发送所述第一策略规则以及所述第二策略规则。
其中，所述第一策略规则中包括第一指示信息；所述第一指示信息用于所述第一用户面网元确定在所述第一数据中携带第二指示信息，所述第二指示信息用于所述第一应用服务器确定在所述第二数据中携带所述第一会话的标识信息；和/或，所述第一指示信息用于所述第一用户面网元确定在所述第二数据中携带所述第一会话的标识信息，所述第一会话的标识信息用于所述第一应用服务器确定在所述第二数据中携带所述第一会话的标识信息。
第一用户面网元可用于接收第一策略规则和第二策略规则。
第一应用服务器可用于接收来自第一用户面网元的第一应用的第一数据，所述第一数据中包括第二指示信息或第一会话的标识信息。第一应用服务器根据第二指示信息或第一会话的标识信息，在第二数据中携带第一会话的标识信息，所述第一会话用于传输终端与第二应用服务器之间的所述第一应用的数据，所述第二数据根据所述第一数据确定。第一应用服务器还可向所述第一用户面网元发送向所述第二数据。
第八方面，本申请实施例提供一种通信方法，该通信方法可由会话管理网元(或会话管理网元中的芯片)、策略控制网元(或策略控制网元中的芯片)以及第一用户面网元(或第一用户面网元中的芯片)执行。
根据该方法，策略控制网元可接收来自第一应用功能网元的请求消息，所述请求消息中包括终端的地址以及第一应用服务器的地址，所述第一应用服务器对应于所述第一应用，所述第一服务器与所述第一应用功能网元对应。所述策略控制网元还可用于根据所述终端的地址，确定所述请求消息与第一会话关联，所述第一会话用于传输所述终端与第二应用服务器之间的所述第一应用的数据，所述第二应用服务器对应于所述第一应用。所述策略控制网元还可用于向会话管理网元发送所述第一应用服务器的地址。
所述会话管理网元可用于接收所述第一应用服务器的地址。所述会话管理网元还可用于确定第一策略规则和第二策略规则；所述第一策略规则用于指示第一用户面网元将所述第一应用的第一数据导向至所述第一应用服务器；所述第二策略规则中包括所述第一应用服务器的地址，所述第一应用服务器的地址用于所述第一用户面网元确定将第二数据发送至所述第一会话关联的网元，其中，所述第二数据来自于所述第一应用服务器，且所述第二数据中包括所述第一应用服务器的地址。会话管理网元还可向所述第一用户面网元发送所述第一策略规则以及所述第二策略规则。
所述第一用户面网元，可用于接收所述第一策略规则以及所述第二策略规则。
第九方面，本申请实施例提供一种通信装置，本申请实施例提供一种通信装置。该通信装置可用于执行上述第一方面或第一方面的任一可能的设计中由会话管理网元执行的 步骤。该通信装置可通过硬件结构、软件模块、或硬件结构加软件模块的形式来实现上述各方法中的各功能或步骤或操作。比如，在该通信装置中可以设置与上述各方法中的功能或步骤或操作相对应的功能模块来支持该通信装置执行上述方法。
示例性的，该通信装置可以是会话管理网元或会话管理网元中的芯片。
在通过软件模块实现第九方面所示通信装置时，该通信装置可包括处理模块以及通信模块。示例性的，通信模块可与处理模块相互耦合，其中，通信模块可用于支持通信装置进行通信。处理模块可用于通信装置执行处理操作，如生成需要发送的信息/消息，或对接收的信号进行处理以得到信息/消息。
以上通信模块可用于执行上述方法中会话管理网元的发送和/或接收的动作，如用于执行会话管理网元向第一用户面网元发送信息、消息或信令的动作。此外，处理模块可用于执行上述方法中会话管理网元的处理动作，如用于确定第一策略规则和/或第二策略规则，或用于控制通信模块进行信息、消息或信令的接收和/或发送，以及信息的处理和存储等操作。
具体的，处理模块可用于确定第一方面所示的第一策略规则和第二策略规则。通信模块可用于向第一用户面网元发送第一策略规则和第二策略规则。
在一种可能的示例中，通信模块还可用于接收来自策略控制网元的第三指示信息，所述第三指示信息用于指示所述第一应用服务器终结所述第一应用的数据流。则所述处理模块还可用于：根据所述第三指示信息在所述第一策略规则中携带所述第一指示信息。
在另一种可能的示例中，通信模块还可用于接收来自策略控制网元的第四指示信息，所述第四指示信息用于指示所述第一应用服务器终结所述第一应用的数据流。则所述处理模块还可用于：根据所述第四指示信息在所述第一策略规则中携带所述第一会话的标识信息。
在通过硬件组件实现第九方面所示通信装置时，该通信装置可包括通信接口。示例性的，通信接口可与处理器相互耦合，其中，通信接口可用于支持通信装置进行通信。处理器可用于通信装置执行处理操作，如生成需要发送的信息/消息，或对接收的信号进行处理以得到信息/消息。
以上通信接口可用于执行上述方法中会话管理网元的发送和/或接收的动作，如用于执行会话管理网元向第一用户面网元发送信息、消息或信令的动作。此外，处理器可用于执行该方法中会话管理网元的处理动作，如用于确定第一策略规则和/或第二策略规则，用于控制通信接口进行信息、消息或信令的接收和或发送，以及信息、消息或信令的处理和存储等操作。
具体的，处理器可用于确定第一方面所示的第一策略规则和第二策略规则。通信接口可用于向第一用户面网元发送第一策略规则和第二策略规则。
在一种可能的示例中，通信接口还可用于接收来自策略控制网元的第三指示信息，所述第三指示信息用于指示所述第一应用服务器终结所述第一应用的数据流。则所述处理器还可用于：根据所述第三指示信息在所述第一策略规则中携带所述第一指示信息。
在另一种可能的示例中，通信接口还可用于接收来自策略控制网元的第四指示信息，所述第四指示信息用于指示所述第一应用服务器终结所述第一应用的数据流。则所述处理器还可用于：根据所述第四指示信息在所述第一策略规则中携带所述第一会话的标识信息。
第十方面，本申请实施例提供一种通信装置，本申请实施例提供一种通信装置。该通信装置可用于执行上述第二方面或第二方面的任一可能的设计中由第一用户面网元执行的步骤。该通信装置可通过硬件结构、软件模块、或硬件结构加软件模块的形式来实现上述各方法中的各功能或步骤或操作。比如，在该通信装置中可以设置与上述各方法中的功能或步骤或操作相对应的功能模块来支持该通信装置执行上述方法。
示例性的，该通信装置可以是第一用户面网元或第一用户面网元中的芯片。
在通过软件模块实现第十方面所示通信装置时，该通信装置可包括处理模块以及通信模块。示例性的，通信模块可与处理模块相互耦合，其中，通信模块可用于支持通信装置进行通信。处理模块可用于通信装置执行处理操作，如生成需要发送的信息/消息，或对接收的信号进行处理以得到信息/消息。
以上通信模块可用于执行上述方法中第一用户面网元的发送和/或接收的动作，如用于执行接收来自会话管理网元的信息、消息或信令的动作。此外，处理模块可用于执行上述方法中第一用户面网元的处理动作，如用于控制通信模块进行信息、消息或信令的接收和/或发送，以及信息的处理和存储等操作。
具体的，通信模块可用于接收来自会话管理网元的第一策略规则以及第二策略规则。
在通过硬件组件实现第十方面所示通信装置时，该通信装置可包括通信接口。示例性的，通信接口可与处理器相互耦合，其中，通信接口可用于支持通信装置进行通信。处理器可用于通信装置执行处理操作，如生成需要发送的信息/消息，或对接收的信号进行处理以得到信息/消息。
以上通信接口可用于执行上述方法中第一用户面网元的发送和/或接收的动作，如用于执行接收来自会话管理网元的信息、消息或信令的动作。此外，处理器可用于执行该方法中第一用户面网元的处理动作，如用于控制通信接口进行信息、消息或信令的接收和或发送，以及信息、消息或信令的处理和存储等操作。
具体的，通信接口可用于接收来自会话管理网元的第一策略规则以及第二策略规则。
第十一方面，本申请实施例提供一种通信装置，本申请实施例提供一种通信装置。该通信装置可用于执行上述第三方面或第三方面的任一可能的设计中由第一应用服务器执行的步骤。该通信装置可通过硬件结构、软件模块、或硬件结构加软件模块的形式来实现上述各方法中的各功能或步骤或操作。比如，在该通信装置中可以设置与上述各方法中的功能或步骤或操作相对应的功能模块来支持该通信装置执行上述方法。
示例性的，该通信装置可以是第一应用服务器或第一应用服务器中的芯片。
在通过软件模块实现第十一方面所示通信装置时，该通信装置可包括处理模块以及通信模块。示例性的，通信模块可与处理模块相互耦合，其中，通信模块可用于支持通信装置进行通信。处理模块可用于通信装置执行处理操作，如生成需要发送的信息/消息，或对接收的信号进行处理以得到信息/消息。
以上通信模块可用于执行上述方法中第一应用服务器的发送和/或接收的动作，如用于执行接收来自第一用户面网元的数据、信息、消息或信令的动作。此外，处理模块可用于执行上述方法中第一应用服务器的处理动作，如用于控制通信模块进行信息、消息或信令的接收和/或发送，以及信息的处理和存储等操作。
具体的，通信模块可接收来自第一用户面网元的第一应用的第一数据，所述第一数据中包括第二指示信息或第一会话的标识信息。处理模块可根据第二指示信息或第一会话的 标识信息，在第二数据中携带第一会话的标识信息。通信模块还可向所述第一用户面网元发送向所述第二数据。
在通过硬件组件实现第十一方面所示通信装置时，该通信装置可包括通信接口。示例性的，通信接口可与处理器相互耦合，其中，通信接口可用于支持通信装置进行通信。处理器可用于通信装置执行处理操作，如生成需要发送的信息/消息，或对接收的信号进行处理以得到信息/消息。
以上通信接口可用于执行上述方法中第一应用服务器的发送和/或接收的动作，如用于执行接收来自第一用户面网元的数据、信息、消息或信令的动作。此外，处理器可用于执行上述方法中第一应用服务器的处理动作，如用于控制通信模块进行信息、消息或信令的接收和/或发送，以及信息的处理和存储等操作。
具体的，通信接口可接收来自第一用户面网元的第一应用的第一数据，所述第一数据中包括第二指示信息或第一会话的标识信息。处理器可根据第二指示信息或第一会话的标识信息，在第二数据中携带第一会话的标识信息。通信接口还可向所述第一用户面网元发送向所述第二数据。
第十二方面，本申请实施例提供一种通信装置，本申请实施例提供一种通信装置。该通信装置可用于执行上述第四方面或第四方面的任一可能的设计中由会话管理网元执行的步骤。该通信装置可通过硬件结构、软件模块、或硬件结构加软件模块的形式来实现上述各方法中的各功能或步骤或操作。比如，在该通信装置中可以设置与上述各方法中的功能或步骤或操作相对应的功能模块来支持该通信装置执行上述方法。
示例性的，该通信装置可以是会话管理网元或会话管理网元中的芯片。
在通过软件模块实现第十二方面所示通信装置时，该通信装置可包括处理模块以及通信模块。示例性的，通信模块可与处理模块相互耦合，其中，通信模块可用于支持通信装置进行通信。处理模块可用于通信装置执行处理操作，如生成需要发送的信息/消息，或对接收的信号进行处理以得到信息/消息。
以上通信模块可用于执行上述方法中会话管理网元的发送和/或接收的动作，如用于执行会话管理网元向策略控制网元和/或第一用户面网元发送信息、消息或信令的动作。此外，处理模块可用于执行上述方法中会话管理网元的处理动作，如用于确定第一策略规则和/或第二策略规则，或用于控制通信模块进行信息、消息或信令的接收和/或发送，以及信息的处理和存储等操作。
具体的，通信模块可接收来自策略控制网元的第一应用服务器的地址。会话管理网元确定第一策略规则和第二策略规则。通信模块还可用于向第一用户面网元发送所述第一策略规则以及第二策略规则。
在通过硬件组件实现第十二方面所示通信装置时，该通信装置可包括通信接口。示例性的，通信接口可与处理器相互耦合，其中，通信接口可用于支持通信装置进行通信。处理器可用于通信装置执行处理操作，如生成需要发送的信息/消息，或对接收的信号进行处理以得到信息/消息。
以上通信接口可用于执行上述方法中会话管理网元的发送和/或接收的动作，如用于执行会话管理网元向策略控制网元和/或第一用户面网元发送信息、消息或信令的动作。此外，处理器可用于执行该方法中会话管理网元的处理动作，如用于确定第一策略规则和/或第二策略规则，用于控制通信接口进行信息、消息或信令的接收和或发送，以及信息、消息或 信令的处理和存储等操作。
具体的，通信接口可接收来自策略控制网元的第一应用服务器的地址。处理器可用于确定第一策略规则以及第二策略规则。通信接口还可用于向第一用户面网元发送所述第一策略规则以及第二策略规则。
第十三方面，本申请实施例提供一种通信装置，本申请实施例提供一种通信装置。该通信装置可用于执行上述第五方面或第五方面的任一可能的设计中由第一用户面网元执行的步骤。该通信装置可通过硬件结构、软件模块、或硬件结构加软件模块的形式来实现上述各方法中的各功能或步骤或操作。比如，在该通信装置中可以设置与上述各方法中的功能或步骤或操作相对应的功能模块来支持该通信装置执行上述方法。
示例性的，该通信装置可以是第一用户面网元或第一用户面网元中的芯片。
在通过软件模块实现第十三方面所示通信装置时，该通信装置可包括处理模块以及通信模块。示例性的，通信模块可与处理模块相互耦合，其中，通信模块可用于支持通信装置进行通信。处理模块可用于通信装置执行处理操作，如生成需要发送的信息/消息，或对接收的信号进行处理以得到信息/消息。
以上通信模块可用于执行上述方法中第一用户面网元的发送和/或接收的动作，如用于执行接收来自会话管理网元的信息、消息或信令的动作。此外，处理模块可用于执行上述方法中第一用户面网元的处理动作，如用于控制通信模块进行信息、消息或信令的接收和/或发送，以及信息的处理和存储等操作。
具体的，通信模块可用于接收来自会话管理网元的第一策略规则以及第二策略规则。
在通过硬件组件实现第十三方面所示通信装置时，该通信装置可包括通信接口。示例性的，通信接口可与处理器相互耦合，其中，通信接口可用于支持通信装置进行通信。处理器可用于通信装置执行处理操作，如生成需要发送的信息/消息，或对接收的信号进行处理以得到信息/消息。
以上通信接口可用于执行上述方法中第一用户面网元的发送和/或接收的动作，如用于执行接收来自会话管理网元的信息、消息或信令的动作。此外，处理器可用于执行该方法中第一用户面网元的处理动作，如用于控制通信接口进行信息、消息或信令的接收和或发送，以及信息、消息或信令的处理和存储等操作。
具体的，通信接口可用于接收来自会话管理网元的第一策略规则以及第二策略规则。
第十四方面，本申请实施例提供一种通信装置，本申请实施例提供一种通信装置。该通信装置可用于执行上述第六方面或第六方面的任一可能的设计中由策略控制网元执行的步骤。该通信装置可通过硬件结构、软件模块、或硬件结构加软件模块的形式来实现上述各方法中的各功能或步骤或操作。比如，在该通信装置中可以设置与上述各方法中的功能或步骤或操作相对应的功能模块来支持该通信装置执行上述方法。
示例性的，该通信装置可以是策略控制网元或策略控制网元中的芯片。
在通过软件模块实现第十四方面所示通信装置时，该通信装置可包括处理模块以及通信模块。示例性的，通信模块可与处理模块相互耦合，其中，通信模块可用于支持通信装置进行通信。处理模块可用于通信装置执行处理操作，如生成需要发送的信息/消息，或对接收的信号进行处理以得到信息/消息。
以上通信模块可用于执行上述方法中策略控制网元的发送和/或接收的动作，如用于执行策略控制网元向会话管理网元发送信息、消息或信令的动作。此外，处理模块可用于执 行上述方法中会话管理网元的处理动作，如用于控制通信模块进行信息、消息或信令的接收和/或发送，以及信息的处理和存储等操作。
具体的，通信模块可接收来自第一应用功能网元的请求消息，所述请求消息中包括终端的地址以及第一应用服务器的地址，所述第一应用服务器对应于所述第一应用，所述第一服务器与所述第一应用功能网元对应。处理模块可根据所述终端的地址，确定所述请求消息与第一会话关联，所述第一会话用于传输所述终端与第二应用服务器之间的所述第一应用的数据，所述第二应用服务器对应于所述第一应用。通信模块还可用于向会话管理网元发送所述第一应用服务器的地址。
在通过硬件组件实现第十四方面所示通信装置时，该通信装置可包括通信接口。示例性的，通信接口可与处理器相互耦合，其中，通信接口可用于支持通信装置进行通信。处理器可用于通信装置执行处理操作，如生成需要发送的信息/消息，或对接收的信号进行处理以得到信息/消息。
以上通信接口可用于执行上述方法中策略控制网元的发送和/或接收的动作，如用于执行策略控制网元向会话管理网元发送信息、消息或信令的动作。此外，处理器可用于执行该方法中会话管理网元的处理动作，如用于控制通信接口进行信息、消息或信令的接收和或发送，以及信息、消息或信令的处理和存储等操作。
具体的，通信接口可接收来自第一应用功能网元的请求消息，所述请求消息中包括终端的地址以及第一应用服务器的地址，所述第一应用服务器对应于所述第一应用，所述第一服务器与所述第一应用功能网元对应。处理器可根据所述终端的地址，确定所述请求消息与第一会话关联，所述第一会话用于传输所述终端与第二应用服务器之间的所述第一应用的数据，所述第二应用服务器对应于所述第一应用。通信接口还可用于向会话管理网元发送所述第一应用服务器的地址。
第十五方面，本申请实施例提供一种通信系统。该系统可包括如第九方面、第十方面以及第十一方面所示的通信装置。
第十六方面，本申请实施例提供一种通信系统。该系统可包括如第十二方面、第十三方面以及第十四方面所示的通信装置。
第十七方面，本申请实施例提供一种计算机可读存储介质，所述计算机可读存储介质用于存储计算机程序或指令，当所述计算机程序或指令被执行时，使得第一方面、第二方面、第三方面、第四方面、第五方面或第六方面所示的方法被实现。
第十八方面，本申请实施例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或指令，当所述包括计算机程序或指令被执行时，使得第一方面、第二方面、第三方面、第四方面、第五方面或第六方面所示的方法被实现。
第十九方面，本申请提供一种芯片和/或包含芯片的芯片系统，该芯片可包括处理器。当所述芯片执行存储器中的计算机程序时，如第一方面、第二方面、第三方面、第四方面、第五方面或第六方面所示的方法被执行。该芯片系统可以由上述芯片构成，也可以包含上述芯片和其他分立器件，如存储器(或存储模块)和/或收发器(或通信模块)。
附图说明
图1为一种本地应用服务器与中央DN应用服务器通过处理应用数据的架构示意图；
图2为本申请实施例提供的一种通信系统的架构示意图；
图3为本申请实施例提供的另一种通信系统的架构示意图；
图4为本申请实施例提供的一种通信方法的流程示意图；
图5为本申请实施例提供的另一种通信方法的流程示意图；
图6为本申请实施例提供的另一种通信方法的流程示意图；
图7为本申请实施例提供的另一种通信方法的流程示意图；
图8为本申请实施例提供的另一种通信方法的流程示意图；
图9为本申请实施例提供的另一种通信方法的流程示意图；
图10为本申请实施例提供的一种通信装置的结构示意图；
图11为本申请实施例提供的另一种通信装置的结构示意图；
图12为本申请实施例提供的另一种通信装置的结构示意图；
图13为本申请实施例提供的另一种通信装置的结构示意图；
图14为本申请实施例提供的另一种通信装置的结构示意图；
图15为本申请实施例提供的另一种通信装置的结构示意图；
图16为本申请实施例提供的另一种通信装置的结构示意图；
图17为本申请实施例提供的另一种通信装置的结构示意图。
具体实施方式
本申请实施例提供的通信方法可以用于如图2所示场景。
图2所示的网络架构中可包括三部分：终端、数据网络(data network，DN)和运营商网络。
其中，运营商网络可包括策略控制功能(policy control function，PCF)、统一数据管理(unified data management，UDM)、应用功能(application function，AF)、接入与移动性管理功能(access and mobility management function，AMF)、会话管理功能(session management function，SMF)、(无线)接入网((radio)access network，(R)AN)以及用户面功能(user plane function，UPF)等。上述运营商网络中，除(无线)接入网之外的部分可以包括在核心网络(core network，CN)的范畴内。为方便说明，后续以(R)AN称为RAN为例进行说明。
以上所示移动性管理网元是由运营商网络提供的控制面网元，负责终端接入运营商网络时的接入控制和移动性管理，其具备例如移动状态管理，分配用户临时身份标识，认证和授权用户等功能。在5G中，移动性管理网元可以是AMF，在未来通信如第六代(the 6th generation，6G)中，移动性管理网元仍可以是AMF，或有其它的名称，本申请不做限定。
以上策略控制网元是由运营商提供的控制面功能，用于向会话管理网元提供PDU会话的策略。策略可以包括计费相关策略、服务质量(quality of service，QoS)相关策略、数据流识别和导向(或称转发)策略和授权相关策略等。在5G中，策略控制网元可以是PCF，在未来通信如6G中，策略控制网元仍可以是PCF，或有其它的名称，本申请不做限定。
以上所示会话管理网元是由运营商网络提供的控制面网元，负责管理终端的PDU会话，或称，会话管理网元服务于终端的PDU会话。PDU会话是一个用于传输PDU的通道，终端需要通过PDU会话与DN互相传送PDU。PDU会话由SMF负责建立、维护和删除等。SMF包括会话管理(如会话建立、修改和释放，包含UPF和RAN之间的隧道维护)、UPF 的选择和控制、业务和会话连续性(service and session continuity，SSC)模式选择、漫游等会话相关的功能。SMF可用于选择为用户进行服务的UPF，比如选择更靠近用户所在基站的UPF，来降低用户收发包时延。在5G中，会话管理网元可以是SMF，在未来通信如6G中，会话管理网元仍可以是SMF，或有其它的名称，本申请不做限定。
本申请中，会话管理网元还可根据需要在终端的接入网网元和锚点UPF之间插入分叉点(Branch Point，BP)和/或上行分类器(Uplink Classifier，UL CL)，每个BP/UL CL可连接至多个UPF以实现业务分流。应理解，可由UPF实现BP/UL CL。
以上AF可用于选择、重选、定位、重定位应用的AS，并与核心网进行交互。在实际应用中，AF也可以是独立于AS的单独的装置，或者AF也可以与AS合设，本发明对此不进行具体限定。
图2中N1、N2、N3、N4、N5、N6、N7、N8、N9、N11以及N15等为接口序列号。这些接口序列号的含义可参见3GPP相关标准协议中定义的含义，在此不做限制。
如图2所示，UE可通过SMF管理的PDU会话访问DN。以图2为例，UE可通过一个PDU会话访问UPF1连接的数据网络DN1，以获取该数据网络中应用服务器的数据。此外，UE可通过同一个PDU会话访问UPF2连接的数据网络DN2，以获取该数据网络中应用服务器的数据。图2所示的多个DN，可分别理解为图1所示的本地应用服务器和中心数据网络的应用服务器。
应理解，例如图2所示，若第二应用服务器部署于DN1，连接至第二应用服务器的数据网络的UPF为UPF1，此时，图2中的DN2可以是一个本地数据网络，第一应用服务器，可部署于图2所示的DN2，第一用户面网元为UPF2。
此外，图1所示的本地PSA和BP/UL CL也可合一设置，例如图3所示，若连接至第二应用服务器的数据网络DN4的UPF为UPF4，第一应用服务器部署于本地数据网络DN3，则本地PSA和BP/UL CL合一后可包括图3所示的UPF3。该示例中，第一用户面网元为UPF3。
以上DN，可以是位于运营商网络之外的网络，运营商网络可以通过UPF接入多个DN。DN中可部署应用服务器，每个应用服务器可对应一种或多种业务，用于向终端提供数据和/或语音等服务。
应理解，本申请中的DN可以是本地数据网络，例如部署于MEC环境等局域网中的数据网络。例如，DN是某智能工厂的私有网络，智能工厂安装在车间的传感器可视为终端，DN中部署了传感器的控制服务器，控制服务器可为传感器提供服务，或对传感器的数据进行处理。传感器可与控制服务器通信，获取控制服务器的指令，根据指令将采集的传感器数据传送给控制服务器等。又例如，DN是某公司的内部办公网络，该公司员工的手机或者电脑可视为终端，员工的手机或者电脑可以访问公司内部办公网络上的信息、数据资源等，也可由公司的内部办公网络中部署的服务器对员工的手机或者电脑的数据进行处理。
此外，与本地数据网络相对应的，DN也可以是中心DN。本申请中，中心DN是指非部署于局域网的数据网络。中心DN中可部署业务开发商提供的业务服务器，如视频类、游戏类、社交类等软件开发商提供的应用服务器，用于向UE提供相应的服务。
以上所示用户面网元是由运营商提供的用于运营商网络与DN通信的网关。UPF网元可具备数据包路由和传输、包检测、业务用量上报、服务质量(quality of service,QoS)处 理、合法监听、上行包检测、下行数据包存储等用户面相关的功能。在5G中，用户面网元可以是UPF，在未来通信如6G中，用户面网元仍可以是UPF，或有其它的名称，本申请不做限定。
以上UE可以是一种具有无线收发功能的设备，其可以部署在陆地上，包括室内或室外、手持或车载；也可以部署在水面上(如轮船等)；还可以部署在空中(例如飞机、气球和卫星上等)。所述UE可以是手机(mobile phone)、平板电脑(pad)、带无线收发功能的电脑、虚拟现实(virtual reality，VR)终端、增强现实(augmented reality，AR)终端、工业控制(industrial control)中的无线终端、无人驾驶(self driving)中的无线终端、远程医疗(remote medical)中的无线终端、智能电网(smart grid)中的无线终端、运输安全(transportation safety)中的无线终端、智慧城市(smart city)中的无线终端、智慧家庭(smart home)中的无线终端等。如图3所示的UE可包括终端101。
上述终端可通过运营商网络提供的接口(例如N1等)与运营商网络建立连接。终端还可通过接入网网元接入运营商网络，以使用运营商网络提供的数据和/或语音等服务。终端还可通过运营商网络访问DN，使用DN上部署的运营商业务，和/或第三方提供的业务。其中，上述第三方可为运营商网络和终端之外的服务方，可为终端提供他数据和/或语音等服务。其中，上述第三方的具体表现形式，具体可根据实际应用场景确定，在此不做限制。
接入网网元(或称接入网设备)，是指为终端提供无线通信功能的设备，其可部署于RAN。接入网网元包括但不限于：5G中的下一代基站(g nodeB，gNB)、家庭基站(例如，home evolved nodeB，或home node B，HNB)、基带单元(baseBand unit，BBU)、传输点(transmitting and receiving point，TRP)、发射点(transmitting point，TP)、移动交换中心等。
基于图1至图3所示架构，本申请实施例提供一种通信方法，用于将部署于本地数据网络中的本地用于服务器新发起的数据流，导向至终端或数据网络中的应用服务器，提高业务数据协同处理过程的效率。
首先，对本申请实施例提供的方法所涉及的网元进行说明。示例性的，该方法可由会话管理网元、第一用户面网元以及第一应用服务器实施。此外，该方法的实施过程还涉及第二用户面网元以及第二应用服务器。
其中，第一应用服务器与第二应用服务器均对应于相同的应用(以下可将该应用称为第一应用)，第一应用服务器是第一应用部署于本地DN的应用服务器，第二应用服务器是第一应用部署于中心DN的应用服务器，第一应用服务器与第二应用服务器均可用于处理第一应用对应的数据。具体的，第一应用服务器可以是图1所示的第一应用服务器，第二应用服务器可以是图1所示的第一应用服务器。
第一用户面网元可用于访问第一应用服务器所在的本地DN，第二用户面网元可用于访问第二应用服务器所在的中心DN。例如图1所示，第一用户面网元即本地PSA，第二用户面网元即中心PSA。
如图4所示，该通信方法可包括以下步骤：
S101：SMF确定第一策略规则以及第二策略规则。
其中，第一策略规则用于指示第一用户面网元将第一应用的第一数据导向至第一应用服务器。所述第一策略规则中包括第一指示信息。第一指示信息用于第一用户面网元确定在第一数据中携带第二指示信息，第二指示信息用于指示第一应用服务器在第二数据中携 带第一会话的标识信息；和/或，第一指示信息用于第一用户面网元确定在第二数据中携带第一会话的标识信息，所述第一会话的标识信息用于所述第一应用服务器确定在所述第二数据中携带所述第一会话的标识信息。
示例性的，第一会话(可以是一个PDU会话)可用于传输终端与第二应用服务器之间的第一应用的数据。该会话管理网元可用于创建和管理该第一会话。
第二策略规则用于第一用户面网元确定将第一应用的第二数据发送至第一会话关联的网元，其中，第二数据来自于第一应用服务器，第二数据中包括所述第一应用服务器的地址，第二数据中包括第一会话的标识信息。第一会话关联的网元可用于将第二数据发送至终端会第二应用服务器。
S102：SMF向所述第一用户面网元发送所述第一策略规则以及所述第二策略规则。
应理解，第一策略规则和第二策略规则可单独发送或可携带于相同的消息内发送，本申请不予具体限定。
相应地，第一用户面网元接收第一策略规则以及第二策略规则。
采用以上方法，可由会话管理网元向第一用户面网元发送第一策略规则以及第一策略规则，使得第一用户面网元根据第一策略规则执行以下动作：在第一应用的第一数据中携带第一会话的标识信息或携带第二指示信息，并将第一数据发送至第一应用服务器。以及使得第一用户面网元根据第二策略规则执行以下动作：识别携带有第一会话的标识信息且由第一应用服务器发起的第二数据，并将第二数据发送至第一会话关联的网元，从而通过第一会话将第二数据发送至第一会话关联的网元。第一会话关联的网元可用于将第二数据发送至终端会第二应用服务器，因此实现将本地应用服务器新发起的数据流导向至终端或数据网络中的应用服务器。
以上第一会话的标识信息可包括第一用户面网元为第一会话分配的标识(如，通用路由封装(generic routing encapsulation，GRE)关键字(key))或第一会话的地址信息。其中，第一会话的地址信息可包括终端的互联网协议(internet protocol，IP)地址，如IPv4地址或IPv6地址前缀(或IPv6地址前缀对应的地址)。
示例性的，终端的IP地址可由网络在建立第一会话时分配。第一会话的建立过程中，网络还可在第一会话的终端接入的接入网网元(以RAN为例)和第二户用户面网元之间插入BP/UL CL，并分别建立终端和RAN、RAN和BP/UL CL、BU/UL CL和第二户用户面网元之间的隧道。本申请中，可通过IP地址和隧道端点标识(tunnel endpoint identifier，TEID)表示网元接收数据的端点。具体的，第二户用户面网元接收BP/UL CL发送的上行数据的接收端点在本申请中可表示为(IP address1，TEID1)。
示例性的，SMF可确定第一应用的数据需要经过第一应用服务器的处理，且由第一应用服务器根据处理后的数据发起新的数据流。具体的，SMF可在确定第一应用的数据需要经过第一应用服务器的处理且由第一应用服务器根据处理后的数据发起新的数据流后，执行S101所示步骤，即确定第一策略规则和第二策略规则。SMF还可在确定第一应用的数据需要经过第一应用服务器的处理且由第一应用服务器根据处理后的数据发起新的数据流后，选择第一用户面网元。
在一种可能的示例中，SMF可接收来自PCF的指示，根据该指示确定第一应用的数据需要经过第一应用服务器的处理，且由第一应用服务器根据处理后的数据发起新的数据流。其中，可由AF确定第一应用的数据需要经过第一应用服务器的处理，且由第一应用 服务器根据处理后的数据发起新的数据流，并向PCF发送该指示，从而由PCF将该指示发送至SMF。具体的，该指示可以是本地终结指示。例如，本地终结指示可用于表示应用的本地应用服务器会在终结业务数据流后发起新的业务数据流。应理解，这里AF是与中心DN中的第二应用服务器对应的AF。
示例性的，本地终结指示可携带于AF发送至PCF的LAN数据导向信息(LAN traffic steering information)(或称NEF LAN数据导向信息、N6接口LAN数据信息等)中。LAN数据导向信息可携带本地终结指示和/或如表1所示的部分或全部信息。应理解，当LAN数据导向信息未携带本地终结指示时，PCF可根据自身决策(如根据第一应用的信息)确定第一应用的数据需要经过第一应用服务器的处理，且由第一应用服务器根据处理后的数据发起新的数据流；或者，PCF可通过LAN数据导向信息以外的其他途径获取用于指示信息，以获知第一应用的数据需要经过第一应用服务器的处理，且由第一应用服务器根据处理后的数据发起新的数据流。
Figure PCTCN2020142020-appb-000001
表1
示例性的，PCF在接收到LAN数据导向信息后，可根据LAN数据导向信息制定策略计费控制(policy and charging control，PCC)规则，并向SMF发送。其中，PCC规则中可包括该本地终结指示和/或LAN数据导向信息，LAN数据导向信息可包括如表2所示的信息中的部分或全部信息。应理解，当LAN数据导向信息未携带本地终结指示时，SMF可根据自身决策(如根据第一应用的信息)确定第一应用的数据需要经过第一应用服务器的处理，且由第一应用服务器根据处理后的数据发起新的数据流；或者，SMF可通过LAN数据导向信息以外的其他途径获取指示信息，以获知第一应用的数据需要经过第一应用服务器的处理，且由第一应用服务器根据处理后的数据发起新的数据流。
Figure PCTCN2020142020-appb-000002
表2
SMF在接收到来自PCF的PCC规则后，可根据PCC规则选择第一用户面网元。具体的，SMF在接收到PCC规则后，根据本地终结指示确定第一应用的数据需要经过第一应用服务器的处理，且由第一应用服务器根据处理后的数据发起新的数据流，此后，SMF可根据PCC规则携带的局域网接入标识选择第一用户面网元，并确定第一策略规则以及第二策略规则。
在选择第一用户面网元时，SMF可考虑终端当前的位置，选择支持LANAI的用户面网元作为第一用户面网元，并根据需要在第一会话插入BP/UL CL用于通过BP/UL CL分别连接第一应用服务器以及第二应用服务器。此外，SMF还可考虑第二用户面网元的位置选择第一用户面网元，避免路由迂回。
应理解，若LAN数据导向信息中只携带了一个本地应用对应的信息，因此只需选择一个用户面网元作为第一用户面网元。若LAN数据导向信息中携带了多个本地应用对应的信息，则SMF可选择多个第一用户面网元，并且需要根据顺序，将多个第一用户面网元或第一用户面网元连接的BP/UL CL分别插入到第一会话上。
若在第一SMF以及第二SMF之间插入的是BP，则SMF可为终端分配第二IPv6地址前缀，并指示终端在访问该第一应用时需采用该第二IPv6地址前缀对应的IPv6地址。应理解，第二IPv6地址前缀与终端建立第一会话时网络为终端分配的第一IPv6地址前缀不同。其中，SMF可通过路由规则，指示终端在访问该第一应用时需采用该IPv6地址前缀对应的IPv6地址。此时，SMF可修改BP的数据流策略规则，使得BP检测源地址为第二IPv6地址前缀对应的地址的数据流，并将这些数据流导向第一应用服务器。其中，第一应用服务器的接收数据包的接收端点在本申请中可表示为(IP address2，TEID2)。
若在第一用户面网元以及第二用户面网元之间插入的是UL CL，则SMF可修改UL CL的数据流策略规则，使得UL CL检测源地址为终端的IPv4地址的数据流，并将这些数据流发送至第一应用服务器。
此外，SMF还可指示BP/UL CL将来自于第一用户面网元的上行数据发送至第二用户面网元。其中，第二用户面网元接收来自第一用户面网元的数据的接收端点在本申请中可表示为(IP address3，TEID3)。也就是说，对于BP/UL CL，由接收端点(IP address3，TEID3)接收的数据，需发送至第二应用服务器的接收端点(IP address1，TEID1)。
示例性的，在选择第一用户面网元后，SMF可向第一用户面网元发送第一策略规则以及第二策略规则。
具体来说，第一策略规则以及第二策略规则可分别包括报文检测规则(packet detection rule，PDR)以及转发动作规则(forwarding action rule，FAR)。其中，PDR用于指示第一用户面网元根据何种规则检测数据流。FAR用于指示第一用户面网元将检测出的数据流进行何种处理。
根据本申请实施例提供的通信方法，第一策略规则的PDR(以下可称为PDR#1)可用于指示第一用户面网元检测第一数据。第一策略规则的FAR(以下可称为FAR#1)可用于指示第一用户面网元将第一数据导向至第一应用服务器。此外，FAR#1中还可携带第一指示信息，以指示第一用户面网元在第二数据中携带第二指示信息和/或第一会话的标识信息。
示例性的，PDR#1携带的分组检测信息(packet detection information，PDI)可如表3所示。
Figure PCTCN2020142020-appb-000003
表3
示例性的，FAR#1携带的内容可如表4所示。
Figure PCTCN2020142020-appb-000004
Figure PCTCN2020142020-appb-000005
表4
第二策略规则的PDR(以下可称为PDR#2)可用于指示第一用户面网元检测数据的来源、数据是否携带第一应用服务器的地址，以及数据是否携带第一会话的标识信息，若均满足，则该数据流为第二数据。第二策略规则的FAR(以下可称为FAR#2)可用于指示第一用户面网元将第二数据导向至第一会话关联的网元。具体的，第一会话关联的网元可包括终端接入的RAN或第二用户面网元。或者，第一会话关联的网元可包括BP/UL CL，其中，BP/UL CL用于将第一数据发送至第一用户面网元。
示例性的，PDR#2携带的PDI可如表5所示。
Figure PCTCN2020142020-appb-000006
表5
示例性的，FAR#2携带的内容可如表6所示。
Figure PCTCN2020142020-appb-000007
表6
下面以第一应用的上行数据的传输为例，通过流程图对于本申请实施例提供的通信方法的实施流程进行示例性说明。
若在建立第一会话之后，网络识别第一应用的数据需要经过本地应用服务器的处理， 则本申请实施例提供的通信方法可包括如图5所示的以下步骤：
S201：建立第一会话。
第一会话的建立过程可由UE发起。具体的，第一会话的建立过程可涉及一下操作：网络选择第二用户面网元作为PSA。网络给终端分配IP地址为，记为Addr1(可以是第一IPv6前缀或IPv4地址)。终端通过第一会话访问第一应用对应的中心DN的第二应用服务器。网络在终端接入的RAN和第二用户面网元之间插入BP/UL CL。分别建立终端和RAN、RAN和BP/UL CL、BU/UL CL和第二用户面网元之间的隧道。其中第二用户面网元接收BP/UL CL发送的上行数据的接收端点为(IP address1，TEID1)。
S202：AF确定终端正在访问的第一应用的数据流中的数据需经过本地局域网的第一应用服务器的处理，且由第一应用服务器根据处理后的数据发起新的数据流。
S203：AF向PCF发送LAN数据导向信息以及终端的地址Addr1。
其中，LAN数据导向信息可携带本地直接指示和/或如表1所示的部分或全部信息，以指示第一应用的数据流中的数据需经过本地局域网的第一应用服务器的处理，且由第一应用服务器根据处理后的数据发起新的数据流。
具体的，LAN数据导向信息可携带于AF向PCF发送的策略授权创建(Npcf_PolicyAuthorization_Create)请求消息中。
在实施中，策略授权创建请求消息可由AF直接发送至PCF，或由AF发送至NEF，再由NEF转发至PCF。
相应地，PCF接收到LAN数据导向信息，并向AF发送确认消息(或称应答消息或响应消息等)。
S204：PCF根据LAN数据导向信息进行PCC规则授权，制定PCC规则。
其中，当LAN数据导向信息中包括空间有效性条件和/或时间有效性条件时，只有满足这些条件才进行PCC授权。
示例性的，PCF可在PCC规则中携带LAN数据导向信息，PCC规则中携带的LAN数据导向信息包括本地终结指示和/或如表2所示的信息中的部分或全部信息。
S205：PCF向SMF发送PCC规则。
相应地，SMF接收PCC规则，并在安装PCC规则后向PCF发送确认消息。
S206：SMF根据PCC规则中的LAN数据导向信息，选择第一用户面网元。
其中，选择第一用户面网元的方式可参照前述对于选择第一用户面网元的说明，在此不再赘述。
应理解，SMF还可根据LAN数据导向信息中的“识别数据的信息”或“方向信息”确定第一会话传输的数据流包括上行数据流，用于针对第一应用的上行数据指定导向规则。
S207：若RAN和第二用户面网元之间插入的是BP，则SMF还可为终端分配第二IPv6地址前缀，并向终端发送路由规则以指示终端采用第二IPv6地址前缀访问第一应用。若RAN和第二用户面网元之间插入的是UL CL，则不需要执行此步骤。
S208：SMF向BP/UL CL发送N4会话修改请求，其中携带第三策略规则。
第三策略规则用于指示BP/UL CL将第一数据发送给第一用户面网元。其中，第一数据为第一应用的上行数据。对于BP，第三策略规则可用于指示BP识别源地址为第二IPv6地址前缀对应的地址的第一应用的数据为第一数据，以及，第三策略规则可用于指示BP将第一数据发送至第一用户面网元的端点(IP address2，TEID2)。对于UL CL，第三策略 规则可用于指示UL CL识别与“识别数据的信息”中的应用标识或应用的三元组对应的数据包为第一数据；以及，第三策略规则可用于指示BP将第一数据发送至第一用户面网元的端点(IP address2，TEID2)。
此外，第三策略规则还可用于指示BP/UL CL将来自第一用户面网元的数据发送给第二用户面网元的接收端点(IP address1，TEID1)。应理解，SMF也可向BP/UL CL发送第四策略规则，由第四策略规则指示BP/UL CL将来自第一用户面网元的数据发送给第二用户面网元的接收端点(IP address1，TEID1)。
相应地，BP/UL CL可在接收来自SMF的策略规则后，向SMF发送确认消息。
S209：SMF向第一用户面网元发送N4会话建立请求消息，其中携带第一策略规则以及第二策略规则。
具体的，第一策略规则可携带PDR#1以及FAR#1，PDR#1携带的PDI可如表3所示，FAR#1携带的内容可如表4所示。第二策略规则可携带PDR#2以及FAR#2，PDR#2携带的PDI可如表5所示，FAR#2携带的内容可如表6所示。
相应地，第一用户面网元接收到第一策略规则以及第二策略规则后，可向SMF发送确认消息。
采用上述流程，在进行属性数据传输时，终端用第二IPv6前缀构造的IPv6地址或IPv4地址发起与本地应用的交互，数据包被BP/UL CL发送给第一用户面网元，第一用户面网元根据PDR#1匹配第一数据，并执行FAR#1。根据FAR#1，第一用户面网元执行数据路由策略标识对应的业务导向策略，在数据包头封装第一会话的标识信息(或第二指示信息)，并将第一数据导向至第一应用服务器。第一应用服务器接收第一用户面网元转发的第一数据后，对数据包进行处理后发起与第二应用服务器的交互，其中，第一应用服务器采用自己的地址发起新的数据流(即第二数据)，并根据第一会话的标识信息(或第二指示信息)在第二数据中携带第一会话的标识信息。第一应用服务在第二数据的数据包头封装第一会话的标识信息。第一用户面网元根据第一会话的标识信息将第二数据的数据包发送给BP/UL CL的接收数据端点(IP address3，TEID3)，进而BP/UL CL将数据发送给第二用户面网元的接收端点(IP address1，TEID1)，进而转发至第二应用服务器。通过上述流程，可通过第一用户面网元将本第一用服务器发送的数据包关联到终端的第一会话，使得数据得以转发至第二应用服务器。
此外，对于下行数据，可采用类似的实施方式。具体的，第二应用服务器发起的第一数据发送到BP/UL CL，BP/UL CL可根据第一数据的目的标识以及应用标识识别数据为发送至终端的第一应用的数据，从而将第一数据的数据包发送给第一用户面网元。第一用户面网元根据PDR#1匹配第一数据，并执行FAR#1。根据FAR#1，第一用户面网元执行数据路由策略标识对应的业务导向策略，在数据包头封装第一会话的标识信息(或第二指示信息)，并将第一数据导向至第一应用服务器。第一应用服务器接收第一用户面网元转发的第一数据后，对数据包进行处理后发起与第二应用服务器的交互，其中，第一应用服务器采用自己的地址发起新的数据流(即第二数据)，并在其中携带第一会话的标识信息。第一用户面网元根据第一会话的标识信息将第二数据的数据包发送给终端所接入的RAN的接收数据端点，进而BP/UL CL将数据发送给RAN的接收端点，后续可由RAN将数据发送至终端。通过上述流程，可通过第一用户面网元将本地应用服务器发送的数据包关联到终端的第一会话，使得数据得以转发至终端。
若在建立第一会话之前，网络已经识别第一应用的数据需要经过本地应用服务器的处理(或者换句话说，第一会话不限定是一个已经建立好的会话，可理解为本申请可针对终端的第一应用的任意一个会话执行)，则本申请实施例提供的通信方法可包括如图6所示的以下步骤：
S301：AF确定终端正在访问的第一应用的数据流中的数据需经过本地局域网的第一应用服务器的处理，且由第一应用服务器根据处理后的数据发起新的数据流。
例如，第一应用服务器部署于MEC的LAN中。
S302：AF向NEF发送LAN数据导向信息。
其中，LAN数据导向信息携带有终端的外部组标识(external group ID)。NEF可将外部组标识映射为内部组标识(internal group ID)，并携带在向PCF发送的LAN数据导向信息中。此外，LAN数据导向信息还可携带本地直接指示和/或如表1所示的部分或全部信息，以指示第一应用的数据流中的数据需经过本地局域网的第一应用服务器的处理，且由第一应用服务器根据处理后的数据发起新的数据流。
具体的，LAN数据导向信息可携带于AF向NEF发送的流量影响创建(Nnef_TrafficInfluence_Create)请求消息中。
S303：NEF向统一数据仓储(unified data repository，UDR)发送LAN数据导向信息，用于将LAN数据导向信息存储至UDR。
具体的，LAN数据导向信息可携带于NEF向UDR发送的数据管理创建请求(Nudr_DM_Create)请求消息中。
相应地，UDR在存储LAN数据导向信息后，向NEF发送确认消息。
S304：NEF向AF发送确认消息。
S305：UDR向订阅过LAN数据导向信息的变更通知的PCF发送LAN数据导向信息。
其中，PCF可以向UDR订阅LAN数据导向信息的变更通知，用于获知UDR存储的LAN数据导向信息发生变化。
具体的，LAN数据导向信息可携带于UDR向PCF发送的数据管理通知(Nudr_DM_Notify)请求消息中。
相应地，PCF在接收并存储LAN数据导向信息后，向UDR发送确认消息。
S306：建立第一会话。
第一会话的建立过程可由UE发起。第一会话的建立过程可涉及以下操作：网络选择第二用户面网元作为PSA。网络给终端分配IP地址为，记为Addr1(可以是第一IPv6前缀或IPv4地址)。终端通过第一会话访问第一应用对应的中心DN的第二应用服务器。网络在终端接入的RAN和第二用户面网元之间插入BP/UL CL。分别建立终端和RAN、RAN和BP/UL CL、BU/UL CL和第二用户面网元之间的隧道。其中第二用户面网元接收BP/UL CL发送的上行数据的接收端点为(IP address1，TEID1)。
此外，在第一会话的建立中，SMF可与PCF建立会话管理策略协商(SM policy association)，PCF获取终端所属的组(group)的内部组标识。PCF还可与UDR交互，以获取终端的签约信息。
S307：PCF根据LAN数据导向信息进行PCC规则授权，制定PCC规则。
示例性的，PCF可在识别该LAN数据导向信息适用于第一会话对应的终端后，进行PCC规则授权。
具体的，若PCF获取了终端的内部组标识，则PCF可在确定终端的内部组标识包含在LAN数据导向信息携带的内部组标识后，确定该LAN数据导向信息适用于第一会话对应的终端。或者，若LAN数据导向信息适用于所有的终端，则PCF也可确定该LAN数据导向信息适用于第一会话对应的终端。
此外，当LAN数据导向信息中包括空间有效性条件和/或时间有效性条件时，只有满足这些条件才进行PCC授权。
示例性的，PCF可在PCC规则中携带LAN数据导向信息，PCC规则中携带的LAN数据导向信息包括本地终结指示和/或如表2所示的信息中的部分或全部信息。
S308：PCF向SMF发送PCC规则。
相应地，SMF接收PCC规则，并在安装PCC规则后向PCF发送确认消息。
S309：SMF根据PCC规则中的LAN数据导向信息，选择第一用户面网元。
其中，选择第一用户面网元的方式可参照前述对于选择第一用户面网元的说明，在此不再赘述。
应理解，SMF还可根据“识别数据的信息”或“方向信息”确定第一会话传输的数据流包括上行数据流，用于针对第一应用的上行数据指定导向规则。
S310：若RAN和第二用户面网元之间插入的是BP，则SMF还可为终端分配第二IPv6地址前缀，并向终端发送路由规则以指示终端采用第二IPv6地址前缀访问第一应用。若RAN和第二用户面网元之间插入的是UL CL，则不需要执行此步骤。
S311：SMF向BP/UL CL发送N4会话修改请求，其中携带第三策略规则。
第三策略规则用于指示BP/UL CL将第一数据发送给第一用户面网元。其中，第一数据为第一应用的上行数据。对于BP，第三策略规则可用于指示BP识别源地址为第二IPv6地址前缀对应的地址的第一应用的数据为第一数据，以及，第三策略规则可用于指示BP将第一数据发送至第一用户面网元的端点(IP address2，TEID2)。对于UL CL，第三策略规则可用于指示UL CL识别与“识别数据的信息”中的应用标识或应用的三元组对应的数据包为第一数据，以及，第三策略规则可用于指示BP将第一数据发送至第一用户面网元的端点(IP address2，TEID2)。
此外，第三策略规则还可用于指示BP/UL CL将来自第一用户面网元的数据发送给第二用户面网元的接收端点(IP address1，TEID1)。应理解，SMF也可向BP/UL CL发送第四策略规则，由第四策略规则指示BP/UL CL将来自第一用户面网元的数据发送给第二用户面网元的接收端点(IP address1，TEID1)。
相应地，BP/UL CL可在接收来自SMF的策略规则后，向SMF发送确认消息。
S312：SMF向第一用户面网元发送N4会话建立请求，其中携带第一策略规则以及第二策略规则。
具体的，第一策略规则可携带PDR#1以及FAR#1，PDR#1携带的PDI可如表3所示，FAR#1携带的内容可如表4所示。第二策略规则可携带PDR#2以及FAR#2，PDR#2携带的PDI可如表5所示，FAR#2携带的内容可如表6所示。
相应地，第一用户面网元接收到第一策略规则以及第二策略规则后，可向SMF发送确认消息。
通过上述流程，可通过第一用户面网元将本第一用服务器发送的数据包关联到终端的第一会话，使得经过处理的数据得以转发至第二应用服务器。类似地，对于下行数据的传 输流程，可参照上述流程采用类似的方式实施，这里不再进行具体展开。
基于图1至图3所示架构，本申请实施例提供另一种通信方法可包括如图7所示的以下步骤：
S401：SMF接收来自PCF的第一应用服务器的地址。
S402：SMF确定第一策略规则和第二策略规则。
其中，第一策略规则用于指示第一用户面网元将第一应用的第一数据导向至第一应用服务器。第一策略规则用于指示第一用户面网元将第一应用的第一数据导向至第一应用服务器。
第二策略规则中包括该第一应用服务器的地址，该第一应用服务器的地址用于该第一用户面网元确定将第二数据发送至该第一会话关联的网元，或者说，该第一应用服务器的地址用于该第一用户面网元确定将携带有第一应用服务器的地址的第二数据发送至该第一会话关联的网元。第一会话用于传输终端与第二应用服务器之间的第一应用的数据。其中，第二数据来自于第一应用服务器，且第二数据中包括第一应用服务器的地址。
S403：SMF向该第一用户面网元发送该第一策略规则以及该第二策略规则。
相应地，第一用户面网元接收第一策略规则以及第二策略规则。
采用以上方法，第一用户面网元可根据第二策略规则识别来自第一应用服务器且携带第一应用服务器的地址的第二数据，以及，第一用户面网元可根据第二策略规则将识别出的第二数据，并将第二数据发送至第一会话关联的网元，从而通过第一会话将第二数据发送至终端或者第二应用服务器。
示例性的，以上第一应用服务器的地址，可包括第一应用服务器的与中心DN的第二应用服务器交互所采用的IP地址。
示例性的，PCF可接收来自AF1的第一应用服务器的地址，并在识别第一应用服务器与第一会话的第二应用服务器均对应于第一应用后，将第一应用服务器的地址发送至SMF。应理解，这里AF1是与第一应用服务器对应的AF。
具体的，终端可基于第二IPv6地址前缀对应的地址或终端的IPv4地址向第一应用服务器发起访问，从而可由AF1获取终端的地址(即终端的第二IPv6地址前缀对应的地址或终端的IPv4地址)。
举例来说，AF1可向PCF发送PCC规则的授权请求，并在授权请求中携带第一应用服务器的地址、终端的地址以及业务请求信息等。业务请求信息可包括终端与第一应用服务器交互的五元组信息，QoS请求信息以及AF应用标识(AF app ID)等信息。PCF可根据授权请求中携带的终端的地址，与第一会话的终端的地址进行比对，将该授权请求与第一会话进行关联，并确定PCC规则以及第一会话的关联信息。此后，PCF可向SMF发送第一会话的关联信息以及PCC规则。其中，第一会话的关联信息可包括终端的地址、第一应用服务器的地址以及第一应用的标识之间的对应关系，从而可由SMF获取第一应用服务器的地址。PCC规则可根据业务请求信息确定。
此外，在建立第一会话之后，可由AF2在确定终端正在访问的第一应用的数据流中的数据需经过本地局域网的第一应用服务器的处理，且由第一应用服务器根据处理后的数据发起新的数据流后，向PCF发送终端的地址以及指示，该指示可用于指示第一应用的数据流中的数据需经过本地局域网的第一应用服务器的处理，且由第一应用服务器根据处理后的数据发起新的数据流。该指示可以是本地终结指示。该指示的发送方式可参照本申请中 对于发送本地直接指示的说明，在此不再赘述。其中，AF2可以是第二应用服务器对应的AF。
在S402的实施中，第一策略规则中可包括PDR#3以及FAR#3。其中，PDR#3可用于指示第一用户面网元检测第一数据。FAR#3可用于指示第一用户面网元将第一数据导向至第一应用服务器。
示例性的，PDR#3携带的PDI可参照表3所示。FAR#3携带的内容参照表7所示。
Figure PCTCN2020142020-appb-000008
表7
第二策略规则中可包括PDR#4以及FAR#4。其中，PDR#4可用于指示第一用户面网元识别来自第一应用服务器且携带第一应用服务器的地址的第二数据。FAR#4可用于指示第一用户面网元将第二数据发送至第一会话关联的网元。具体的，第一会话关联的网元可包括终端接入的RAN或第二用户面网元。
示例性的，PDR#4携带的PDI可参照表8所示。
Figure PCTCN2020142020-appb-000009
表8
示例性的，FAR#4携带的内容可参照表6所示。
下面以第一应用的上行数据的传输为例，通过流程图对于本申请实施例提供的通信方法的实施流程进行示例性说明。
若在建立第一会话之后，网络识别第一应用的数据需要经过本地应用服务器的处理，则本申请实施例提供的通信方法可包括如图8所示的以下步骤：
S501：建立第一会话。
第一会话的建立过程可由UE发起。具体的，第一会话的建立过程可涉及一下操作：网络选择第二用户面网元作为PSA。网络给终端分配IP地址为，记为Addr1(可以是第一IPv6前缀或IPv4地址)。终端通过第一会话访问第一应用对应的中心DN的第二应用服务器。网络在终端接入的RAN和第二用户面网元之间插入BP/UL CL。分别建立终端和RAN、RAN和BP/UL CL、BU/UL CL和第二用户面网元之间的隧道。其中第二用户面网元接收BP/UL CL发送的上行数据的接收端点为(IP address1，TEID1)。
S502：AF2确定终端正在访问的第一应用的数据流中的数据需经过本地局域网的第一应用服务器的处理，且由第一应用服务器根据处理后的数据发起新的数据流。
S503：AF2向PCF发送LAN数据导向信息以及终端的地址Addr1。
其中，LAN数据导向信息可携带如表1所示的部分或全部信息，以指示第一应用的数 据流中的数据需经过本地局域网的第一应用服务器的处理，且由第一应用服务器根据处理后的数据发起新的数据流。
具体的，LAN数据导向信息可携带于AF2向PCF发送的策略授权创建请求消息中。
在实施中，策略授权创建请求消息可由AF2直接发送至PCF，或由AF2发送至NEF，再由NEF转发至PCF。
相应地，PCF接收到LAN数据导向信息，并向AF发送确认消息(或称应答消息或响应消息等)。
S504：PCF根据LAN数据导向信息进行PCC规则授权，制定PCC规则。
其中，当LAN数据导向信息中包括空间有效性条件和/或时间有效性条件时，只有满足这些条件才进行PCC授权。
示例性的，PCF可在PCC规则中携带LAN数据导向信息，PCC规则中携带的LAN数据导向信息包括本地终结指示和/或如表2所示的信息中的部分或全部信息。
S505：PCF向SMF发送PCC规则。
相应地，SMF接收PCC规则，并在安装PCC规则后向PCF发送确认消息。
S506：SMF根据PCC规则中的LAN数据导向信息，选择第一用户面网元。
其中，选择第一用户面网元的方式可参照本申请中对于选择第一用户面网元的说明，在此不再赘述。
应理解，SMF还可根据LAN数据导向信息中的“识别数据的信息”或“方向信息”确定第一会话传输的数据流包括上行数据流，用于针对第一应用的上行数据指定导向规则。
S507：若RAN和第二用户面网元之间插入的是BP，则SMF还可为终端分配第二IPv6地址前缀，并向终端发送路由规则以指示终端采用第二IPv6地址前缀访问第一应用。若RAN和第二用户面网元之间插入的是UL CL，则不需要执行此步骤。
S508：SMF向BP/UL CL发送N4会话修改请求，其中携带第三策略规则。
第三策略规则用于指示BP/UL CL将第一数据发送给第一用户面网元。其中，第一数据为第一应用的上行数据。对于BP，第三策略规则可用于指示BP识别源地址为第二IPv6地址前缀对应的地址的第一应用的数据为第一数据，以及，第三策略规则可用于指示BP将第一数据发送至第一用户面网元的端点(IP address2，TEID2)。对于UL CL，第三策略规则可用于指示UL CL识别与“识别数据的信息”中的应用标识对应的数据包为第一数据，以及，第三策略规则可用于指示BP将第一数据发送至第一用户面网元的端点(IP address2，TEID2)
相应地，BP/UL CL可在接收来自SMF的策略规则后，向SMF发送确认消息。
S509：SMF向第一用户面网元发送N4会话建立请求，其中携带第一策略规则。
具体的，第一策略规则可携带PDR#3以及FAR#3。
相应地，第一用户面网元在接收到第一策略规则后，可向SMF发送确认消息。
经过上述步骤后，终端可采用第二IPv6前缀构造的IPv6地址或IPv4地址发起与第一应用服务器的交互，第一应用的数据包被BP/UL CL发送给第一用户面网元，第一用户面网元根据PDR#3匹配相关数据，并执行FAR#3。根据FAR#3，第一用户面网元执行数据路由策略标识对应的业务导向策略，将数据流导向至第一应用服务器。第一应用服务器接收第一用户面网元转发的第一数据后，可对数据包进行处理后发起与第二应用服务器的交互，其中，第一应用服务器采用自己的地址发起新的数据流(即第二数据)。
S510：AF1向PCF发送PCC规则的授权请求。其中，授权请求中携带第一应用服务器的地址、终端的地址(终端的第二IPv6前缀对应的地址或终端的IPv4地址)以及业务请求信息等。业务请求信息可包括终端与第一应用服务器交互的五元组信息，QoS请求信息以及AF应用标识等信息。
相应地，PCF接收到授权请求后，向AF1发送确认消息。
S511：PCF根据授权请求中携带的终端的地址，与第一会话的终端的地址进行比对，确定该授权请求与第一会话关联，并确定PCC规则以及第一会话的关联信息。
其中，第一会话的关联信息可包括终端的地址、第一应用服务器的地址以及第一应用的标识之间的对应关系。PCC规则可由PCF根据授权请求中携带的业务请求信息确定。
在实施中，PCF可在确定AF1发送的终端的地址与第一会话管理的终端的地址一致时，确定该授权请求与第一会话关联。
S512：PCF向SMF发送PCC规则。
相应地，SMF接收PCC规则，并在安装PCC规则后向PCF发送确认消息。
S513：SMF向第一用户面网元发送N4会话修改请求，其中携带第二策略规则。
其中，第二策略规则中可包括PDR#4以及FAR#4。
相应地，第一用户面网元在接收到第二策略规则后，可向SMF发送确认消息。
S514：SMF向BP/UL CL发送N4会话修改请求，其中携带第四策略规则。
第四策略规则可用于指示BP/UL CL将来自第一用户面网元的数据发送给第二用户面网元的接收端点(IP address1，TEID1)。即BP/UL CL采用S501中建立的BP/UL CL与第二用户面网元之间的隧道发送来自第一用户面网元的数据包。
相应地，BP/UL CL在接收到第四策略规则后，可向SMF发送确认消息。
S515：SMF向第一用户面网元发送策略规则，策略规则用于对本地应用服务与中心应用服务的业务数据进行策略计费控制。策略规则根据S510中下发的PCC规则制定。
相应地，第一用户面网元向SMF发送确认消息。
在上述实施例中，终端用第二IPv6前缀构造的IPv6地址或IPv4地址发起与第一应用服务器的交互，数据包被BP/UL CL发送给第一用户面网元，第一用户面网元根据第一策略规则中的PDR#3匹配相关数据，并执行第一策略规则中的FAR#3。根据FAR#3，第一用户面网元执行数据路由策略标识对应的业务导向策略，将第一数据导向至第一应用服务器。此后，第一应用服务器对应的AF1向PCF提供第一应用服务器的地址以及终端的地址。PCF根据第一应用服务器的地址以及终端的地址，将第一会话的关联信息发送给SMF，其中，第一会话的关联信息可包括终端的地址、第一应用服务器的地址以及第一应用的标识之间的对应关系。SMF还可向第一用户面网元发送第二策略规则，用于指示第一用户面网元将第一应用服务器发送的数据包(源地址为IP addr2)发送给BP/UL CL的接收数据端点(address3和TEID3)。SMF还向BP/UL CL发送第三策略规则，用于指示BP/UL CL将接收到的数据包发送给第二用户面网元的接收端点(address1和TEID1)，进而转发至第二应用服务器。通过上述流程，第一用户面网元可将第一应用服务器发送的数据包关联到终端的第一会话，使得数据得以转发至第二应用服务器。
此外，对于下行数据，可采用类似的实施方式。具体的，第二应用服务器发起的第一数据发送到BP/UL CL，BP/UL CL可根据第一数据的目的标识以及应用标识识别数据为发送至终端的第一应用的数据，从而将第一数据的数据包发送给第一用户面网元。第一用户 面网元根据PDR#3匹配第一数据，并执行FAR#3。根据FAR#3，第一用户面网元执行数据路由策略标识对应的业务导向策略，将第一数据导向至第一应用服务器。此后，第一应用服务器对应的AF1向PCF提供第一应用服务器的地址以及终端的地址。PCF根据第一应用服务器的地址以及终端的地址，将第一会话的关联信息发送给SMF，其中，第一会话的关联信息可包括终端的地址、第一应用服务器的地址以及第一应用的标识之间的对应关系。SMF还可向第一用户面网元发送第二策略规则，用于指示第一用户面网元将第一应用服务器发送的数据包(源地址为IP addr2)发送给BP/UL CL的接收数据端点(address3和TEID3)。SMF还向BP/UL CL发送第三策略规则，用于指示BP/UL CL将接收到的数据包发送给终端所接入的RAN的接收数据端点，进而BP/UL CL将数据发送给RAN的接收端点，后续可由RAN将数据发送至终端。通过上述流程，可通过第一用户面网元将本地应用服务器发送的数据包关联到终端的第一会话，使得数据得以转发至终端。
若在建立第一会话之前，网络已经识别第一应用的数据需要经过本地应用服务器的处理(或者换句话说，第一会话不限定是一个已经建立好的会话，可理解为本申请可针对终端的第一应用的任意一个会话执行)，则本申请实施例提供的通信方法可包括如图9所示的以下步骤：
S601：AF确定终端正在访问的第一应用的数据流中的数据需经过本地局域网的第一应用服务器的处理，且由第一应用服务器根据处理后的数据发起新的数据流。
例如，第一应用服务器部署于MEC的LAN中。
S602：AF向NEF发送LAN数据导向信息。
其中，LAN数据导向信息携带有终端的外部组标识。NEF可将外部组标识映射为内部组标识，并携带在向PCF发送的LAN数据导向信息中。此外，LAN数据导向信息还可携带如表1所示的部分或全部信息，以指示第一应用的数据流中的数据需经过本地局域网的第一应用服务器的处理，且由第一应用服务器根据处理后的数据发起新的数据流。
具体的，LAN数据导向信息可携带于AF向NEF发送的流量影响创建请求消息中。
S603：NEF向UDR发送LAN数据导向信息，用于将LAN数据导向信息存储至UDR。
具体的，LAN数据导向信息可携带于NEF向UDR发送的数据管理创建请求消息中。
相应地，UDR在存储LAN数据导向信息后，向NEF发送确认消息。
S604：NEF向AF发送确认消息。
S605：UDR向订阅过LAN数据导向信息的变更通知的PCF发送LAN数据导向信息。
其中，PCF可以向UDR订阅LAN数据导向信息的变更通知，用于获知UDR存储的LAN数据导向信息发生变化。
具体的，LAN数据导向信息可携带于UDR向PCF发送的数据管理通知请求消息中。
相应地，PCF在接收并存储LAN数据导向信息后，向UDR发送确认消息。
S606：建立第一会话。
第一会话的建立过程可由UE发起。第一会话的建立过程可涉及以下操作：网络选择第二用户面网元作为PSA。网络给终端分配IP地址为，记为Addr1(可以是第一IPv6前缀或IPv4地址)。终端通过第一会话访问第一应用对应的中心DN的第二应用服务器。网络在终端接入的RAN和第二用户面网元之间插入BP/UL CL。分别建立终端和RAN、RAN和BP/UL CL、BU/UL CL和第二用户面网元之间的隧道。其中第二用户面网元接收BP/UL CL发送的上行数据的接收端点为(IP address1，TEID1)。
此外，在第一会话的建立中，SMF可与PCF建立会话管理策略协商，PCF获取终端所属的组的内部组标识。PCF还可与UDR交互，以获取终端的签约信息。
S607：PCF根据LAN数据导向信息进行PCC规则授权，制定PCC规则。
示例性的，PCF可在识别该LAN数据导向信息适用于第一会话对应的终端后，进行PCC规则授权。
具体的，若PCF获取了终端的内部组标识，则PCF可在确定终端的内部组标识包含在LAN数据导向信息携带的内部组标识后，确定该LAN数据导向信息适用于第一会话对应的终端。或者，若LAN数据导向信息适用于所有的终端，则PCF也可确定该LAN数据导向信息适用于第一会话对应的终端。
此外，当LAN数据导向信息中包括空间有效性条件和/或时间有效性条件时，只有满足这些条件才进行PCC授权。
示例性的，PCF可在PCC规则中携带LAN数据导向信息，PCC规则中携带的LAN数据导向信息包括本地终结指示和/或如表2所示的信息中的部分或全部信息。
S608：PCF向SMF发送PCC规则。
相应地，SMF接收PCC规则，并在安装PCC规则后向PCF发送确认消息。
S609：SMF根据PCC规则中的LAN数据导向信息，选择第一用户面网元。
其中，选择第一用户面网元的方式可参照本申请中对于选择第一用户面网元的说明，在此不再赘述。
应理解，SMF还可根据LAN数据导向信息中的“识别数据的信息”或“方向信息”确定第一会话传输的数据流包括上行数据流，用于针对第一应用的上行数据指定导向规则。
S610：若RAN和第二用户面网元之间插入的是BP，则SMF还可为终端分配第二IPv6地址前缀，并向终端发送路由规则以指示终端采用第二IPv6地址前缀访问第一应用。若RAN和第二用户面网元之间插入的是UL CL，则不需要执行此步骤。
S611：SMF向BP/UL CL发送N4会话修改请求，其中携带第三策略规则。
第三策略规则用于指示BP/UL CL将第一数据发送给第一用户面网元。其中，第一数据为第一应用的上行数据。对于BP，第三策略规则可用于指示BP识别源地址为第二IPv6地址前缀对应的地址的第一应用的数据为第一数据，以及，第三策略规则可用于指示BP将第一数据发送至第一用户面网元的端点(IP address2，TEID2)。对于UL CL，第三策略规则可用于指示UL CL识别与“识别数据的信息”中的应用标识对应的数据包为第一数据，以及，第三策略规则可用于指示BP将第一数据发送至第一用户面网元的端点(IP address2，TEID2)。
相应地，BP/UL CL可在接收来自SMF的策略规则后，向SMF发送确认消息。
S612：SMF向第一用户面网元发送N4会话建立请求，其中携带第一策略规则。
具体的，第一策略规则可携带PDR#3以及FAR#3。
相应地，第一用户面网元在接收到第一策略规则后，可向SMF发送确认消息。
经过上述步骤后，终端可采用第二IPv6前缀构造的IPv6地址或IPv4地址发起与第一应用服务器的交互，第一应用的数据包被BP/UL CL发送给第一用户面网元，第一用户面网元根据PDR#3匹配相关数据，并执行FAR#3。根据FAR#3，第一用户面网元执行数据路由策略标识对应的业务导向策略，将数据流导向至第一应用服务器。第一应用服务器接收第一用户面网元转发的第一数据后，可对数据包进行处理后发起与第二应用服务器的交 互，其中，第一应用服务器采用自己的地址发起新的数据流(即第二数据)。
S613：AF1向PCF发送PCC规则的授权请求。
其中，授权请求中携带第一应用服务器的地址、终端的地址(终端的第二IPv6前缀对应的地址或终端的IPv4地址)以及业务请求信息等。业务请求信息可包括终端与第一应用服务器交互的五元组信息，QoS请求信息以及AF应用标识等信息。
相应地，PCF接收到授权请求后，向AF1发送确认消息。
S614：PCF根据授权请求中携带的终端的地址，与第一会话的终端的地址进行比对，确定该授权请求与第一会话关联，并确定PCC规则以及第一会话的关联信息。
其中，第一会话的关联信息可包括终端的地址、第一应用服务器的地址以及第一应用的标识之间的对应关系。PCC规则可由PCF根据授权请求中携带的业务请求信息确定。
在实施中，PCF可在确定AF1发送的终端的地址与第一会话管理的终端的地址一致时，确定该授权请求与第一会话关联。
S615：PCF向SMF发送PCC规则。
相应地，SMF接收PCC规则，并在安装PCC规则后向PCF发送确认消息。
S616：SMF向第一用户面网元发送N4会话修改请求，其中携带第二策略规则。
其中，第二策略规则中可包括PDR#4以及FAR#4。
相应地，第一用户面网元在接收到第二策略规则后，可向SMF发送确认消息。
S617：SMF向BP/UL CL发送N4会话修改请求，其中携带第四策略规则。
第四策略规则可用于指示BP/UL CL将来自第一用户面网元的数据发送给第二用户面网元的接收端点(IP address1，TEID1)。即BP/UL CL采用S501中建立的BP/UL CL与第二用户面网元之间的隧道发送来自第一用户面网元的数据包。
相应地，BP/UL CL在接收到第四策略规则后，可向SMF发送确认消息。
S618：SMF向第一用户面网元发送策略规则，策略规则用于对本地应用服务与中心应用服务的业务数据进行策略计费控制。策略规则根据S510中下发的PCC规则制定。
相应地，第一用户面网元向SMF发送确认消息。
通过上述流程，可通过第一用户面网元将本第一用服务器发送的数据包关联到终端的第一会话，使得经过处理的数据得以转发至第二应用服务器。类似地，对于下行数据的传输流程，可参照上述流程采用类似的方式实施，这里为节省篇幅不再进行具体展开。
上述本申请提供的实施例中，从会话管理网元、第一用户面网元、第一应用服务器以及策略控制网元等所实现的功能的角度对本申请实施例提供的方法即方法流程进行了介绍。为了实现上述本申请实施例提供的方法中的各功能，网络设备、第一通信装置、第二通信装置以及第三通信装置可以包括硬件结构和/或软件模块，以硬件结构、软件模块、或硬件结构加软件模块的形式来实现上述各功能。上述各功能中的某个功能以硬件结构、软件模块、还是硬件结构加软件模块的方式来执行，取决于技术方案的特定应用和设计约束条件。
如图10所示，本申请实施例提供的一种通信装置可以包括通信模块1001以及处理模块1002，以上通信模块1001以及处理模块1002之间相互耦合。该通信装置1000可用于执行以上图4、图5、图6、图7、图8以及图9中所示的由会话管理网元执行的步骤。该通信模块1001可用于支持通信装置1000进行通信，通信模块1001也可被称为通信单元、通信接口、收发模块或收发单元。通信模块1001可具备无线通信功能，例如能够通过无 线通信方式与其他通信装置进行通信。处理模块1002也可被称为处理单元，可用于支持该通信装置1000执行上述方法实施例中会话管理网元的处理动作，包括但不限于：生成由通信模块1001发送的信息、消息，和/或，对通信模块1001接收的信号进行解调解码等等。
具体的，在执行上述方法实施例中由图4、图5以及图6中会话管理网元执行的步骤时，以上处理模块1002可用于确定第一方面所示的第一策略规则和第二策略规则。通信模块1001可用于向第一用户面网元发送第一策略规则和第二策略规则。
在一种可能的示例中，通信模块1001还可用于接收来自策略控制网元的第三指示信息，所述第三指示信息用于指示所述第一应用服务器终结所述第一应用的数据流。则所述处理模块1002还可用于：根据所述第三指示信息在所述第一策略规则中携带所述第一指示信息。
在另一种可能的示例中，通信模块1001还可用于接收来自策略控制网元的第四指示信息，所述第四指示信息用于指示所述第一应用服务器终结所述第一应用的数据流。则所述处理模块1002还可用于：根据所述第四指示信息在所述第一策略规则中携带所述第一会话的标识信息。
在执行上述方法实施例中由图7、图8以及图9中由会话管理网元执行的步骤时，以上通信模块1001可接收来自策略控制网元的第一应用服务器的地址。处理模块1002可用于确定第一策略规则以及第二策略规则。通信模块1001还可用于向第一用户面网元发送所述第一策略规则以及第二策略规则。
此外，另一种可能的实现方式中，若通过硬件组件实现该会话管理网元，其结构还可如图11所示。为便于理解，图11中仅示出了执行本申请所示方法所必须的结构，本申请并不限制通信装置可具备更多组件。该通信装置1100可包括通信接口1101、存储器1102以及处理器1103。该通信接口1101可以用于通信装置进行通信，如用于发送或接收信号。该存储器1102与所述处理器1103耦合，其用于保存通信装置1100实现各功能所必要的程序和数据。该处理器1103被配置为支持通信装置1100执行上述方法中由会话管理网元执行的处理功能，如确定生成由通信接口1101发送的信息、消息，和/或，对通信接口1101接收的信号进行解调解码等等。以上存储器1102以及处理器1103可集成于一体也可相互独立。
示例性的，该通信接口1101可以是无线通信接口(或称无线收发器)，可用于支持通信装置1100通过无线空口接收和发送信令和/或数据。另外，通信接口也可以是通信端口，如网元之间用于通信的通信端口(或称接口)。通信接口1101也可被称为收发单元或通信单元。该处理器1103可通过处理芯片或处理电路实现。
在执行本申请所示通信方法时，以上通信接口1101可用于执行通信模块1001所执行的步骤，处理器1103可调用存储器1102中的程序，执行上述由处理模块1002所执行的步骤。
具体的，在执行上述方法实施例中由图4、图5以及图6中会话管理网元执行的步骤时，以上处理器1103可用于确定第一方面所示的第一策略规则和第二策略规则。通信接口1101可用于向第一用户面网元发送第一策略规则和第二策略规则。
在一种可能的示例中，通信接口1101还可用于接收来自策略控制网元的第三指示信息，所述第三指示信息用于指示所述第一应用服务器终结所述第一应用的数据流。则所述处理 器1103还可用于：根据所述第三指示信息在所述第一策略规则中携带所述第一指示信息。
在另一种可能的示例中，通信接口1101还可用于接收来自策略控制网元的第四指示信息，所述第四指示信息用于指示所述第一应用服务器终结所述第一应用的数据流。则所述处理器1103还可用于：根据所述第四指示信息在所述第一策略规则中携带所述第一会话的标识信息。
在执行上述方法实施例中由图7、图8以及图9中会话管理网元执行的步骤时，以上通信接口1101可接收来自策略控制网元的第一应用服务器的地址。处理器1103可用于确定第一策略规则以及第二策略规则。通信接口1101还可用于向第一用户面网元发送所述第一策略规则以及第二策略规则。
如图12所示，本申请实施例提供的一种通信装置可以包括通信模块1201以及处理模块1202，以上通信模块1201以及处理模块1202之间相互耦合。该通信装置1200可用于执行以上图4、图5、图6、图7、图8以及图9中所示的由第一用户面网元执行的步骤。该通信模块1201可用于支持通信装置1200进行通信，通信模块1201也可被称为通信单元、通信接口、收发模块或收发单元。通信模块1201可具备无线通信功能，例如能够通过无线通信方式与其他通信装置进行通信。处理模块1202也可被称为处理单元，可用于支持该通信装置1200执行上述方法实施例中第一用户面网元的处理动作，包括但不限于：生成由通信模块1201发送的信息、消息，和/或，对通信模块1201接收的信号进行解调解码等等。
具体的，在执行上述方法实施例中由图4、图5、图6、图7、图8以及图9中由第一用户面网元执行的步骤时，以上处理模块1202可用于接收来自会话管理网元的第一策略规则以及第二策略规则。
此外，另一种可能的实现方式中，若通过硬件组件实现该第一用户面网元，其结构还可如图13所示。为便于理解，图13中仅示出了执行本申请所示方法所必须的结构，本申请并不限制通信装置可具备更多组件。该通信装置1300可包括通信接口1301、存储器1302以及处理器1303。该通信接口1301可以用于通信装置进行通信，如用于发送或接收信号。该存储器1302与所述处理器1303耦合，其用于保存通信装置1300实现各功能所必要的程序和数据。该处理器1303被配置为支持通信装置1300执行上述方法中由第一用户面网元执行的处理功能，如确定生成由通信接口1301发送的信息、消息，和/或，对通信接口1301接收的信号进行解调解码等等。以上存储器1302以及处理器1303可集成于一体也可相互独立。
示例性的，该通信接口1301可以是无线通信接口(或称无线收发器)，可用于支持通信装置1300通过无线空口接收和发送信令和/或数据。另外，通信接口也可以是通信端口，如网元之间用于通信的通信端口(或称接口)。通信接口1301也可被称为收发单元或通信单元。该处理器1303可通过处理芯片或处理电路实现。
具体的，在执行上述方法实施例中由图4、图5、图6、图7、图8以及图9中由第一用户面网元执行的步骤时，以上通信接口1301可用于接收来自会话管理网元的第一策略规则以及第二策略规则。
如图14所示，本申请实施例提供的一种通信装置可以包括通信模块1401以及处理模块1402，以上通信模块1401以及处理模块1402之间相互耦合。该通信装置1400可用于执行以上图4、图5以及图6中所示的由第一应用服务器执行的步骤。该通信模块1401可 用于支持通信装置1400进行通信，通信模块1401也可被称为通信单元、通信接口、收发模块或收发单元。通信模块1401可具备无线通信功能，例如能够通过无线通信方式与其他通信装置进行通信。处理模块1402也可被称为处理单元，可用于支持该通信装置1400执行上述方法实施例中第一应用服务器的处理动作，包括但不限于：生成由通信模块1401发送的信息、消息，和/或，对通信模块1401接收的信号进行解调解码等等。
具体的，在执行上述方法实施例中由图4、图5以及图6中由第一应用服务器执行的步骤时，以上通信模块1401可用于接收来自第一用户面网元的第一应用的第一数据，所述第一数据中包括第二指示信息或第一会话的标识信息。处理模块1402可根据第二指示信息或第一会话的标识信息，在第二数据中携带第一会话的标识信息。通信模块1401还可向所述第一用户面网元发送向所述第二数据。
此外，另一种可能的实现方式中，若通过硬件组件实现该第一应用服务器，其结构还可如图15所示。为便于理解，图15中仅示出了执行本申请所示方法所必须的结构，本申请并不限制通信装置可具备更多组件。该通信装置1500可包括通信接口1501、存储器1502以及处理器1503。该通信接口1501可以用于通信装置进行通信，如用于发送或接收信号。该存储器1502与所述处理器1503耦合，其用于保存通信装置1500实现各功能所必要的程序和数据。该处理器1503被配置为支持通信装置1500执行上述方法中由第一应用服务器执行的处理功能，如确定生成由通信接口1501发送的信息、消息，和/或，对通信接口1501接收的信号进行解调解码等等。以上存储器1502以及处理器1503可集成于一体也可相互独立。
示例性的，该通信接口1501可以是无线通信接口(或称无线收发器)，可用于支持通信装置1500通过无线空口接收和发送信令和/或数据。另外，通信接口也可以是通信端口，如网元之间用于通信的通信端口(或称接口)。通信接口1501也可被称为收发单元或通信单元。该处理器1503可通过处理芯片或处理电路实现。
具体的，在执行上述方法实施例中由图4、图5以及图6中第一应用服务器的步骤时，以上通信接口1501可用于接收来自第一用户面网元的第一应用的第一数据，所述第一数据中包括第二指示信息或第一会话的标识信息。处理器1503可根据第二指示信息或第一会话的标识信息，在第二数据中携带第一会话的标识信息。通信接口1501还可向所述第一用户面网元发送向所述第二数据。
如图16所示，本申请实施例提供的一种通信装置可以包括通信模块1601以及处理模块1602，以上通信模块1601以及处理模块1602之间相互耦合。该通信装置1600可用于执行以上图7、图8以及图9中所示的由策略控制网元执行的步骤。该通信模块1601可用于支持通信装置1600进行通信，通信模块1601也可被称为通信单元、通信接口、收发模块或收发单元。通信模块1601可具备无线通信功能，例如能够通过无线通信方式与其他通信装置进行通信。处理模块1602也可被称为处理单元，可用于支持该通信装置1600执行上述方法实施例中策略控制网元的处理动作，包括但不限于：生成由通信模块1601发送的信息、消息，和/或，对通信模块1601接收的信号进行解调解码等等。
具体的，在执行上述方法实施例中由图7、图8以及图9中策略控制网元会话管理网元执行的步骤时，以上通信模块1601可用于接收来自第一应用功能网元的请求消息，所述请求消息中包括终端的地址以及第一应用服务器的地址，所述第一应用服务器对应于所 述第一应用，所述第一服务器与所述第一应用功能网元对应。处理模块1602可根据所述终端的地址，确定所述请求消息与第一会话关联，所述第一会话用于传输所述终端与第二应用服务器之间的所述第一应用的数据，所述第二应用服务器对应于所述第一应用。通信模块1601还可用于向会话管理网元发送所述第一应用服务器的地址。
此外，另一种可能的实现方式中，若通过硬件组件实现该策略控制网元，其结构还可如图17所示。为便于理解，图17中仅示出了执行本申请所示方法所必须的结构，本申请并不限制通信装置可具备更多组件。该通信装置1700可包括通信接口1701、存储器1702以及处理器1703。该通信接口1701可以用于通信装置进行通信，如用于发送或接收信号。该存储器1702与所述处理器1703耦合，其用于保存通信装置1700实现各功能所必要的程序和数据。该处理器1703被配置为支持通信装置1700执行上述方法中由策略控制网元执行的处理功能，如确定生成由通信接口1701发送的信息、消息，和/或，对通信接口1701接收的信号进行解调解码等等。以上存储器1702以及处理器1703可集成于一体也可相互独立。
示例性的，该通信接口1701可以是无线通信接口(或称无线收发器)，可用于支持通信装置1700通过无线空口接收和发送信令和/或数据。另外，通信接口也可以是通信端口，如网元之间用于通信的通信端口(或称接口)。通信接口1701也可被称为收发单元或通信单元。该处理器1703可通过处理芯片或处理电路实现。
具体的，在执行上述方法实施例中由图7、图8以及图9中策略控制网元执行的步骤时，以上通信接口1701可用于接收来自第一应用功能网元的请求消息，所述请求消息中包括终端的地址以及第一应用服务器的地址，所述第一应用服务器对应于所述第一应用，所述第一服务器与所述第一应用功能网元对应。处理器1703可根据所述终端的地址，确定所述请求消息与第一会话关联，所述第一会话用于传输所述终端与第二应用服务器之间的所述第一应用的数据，所述第二应用服务器对应于所述第一应用。通信接口1701还可用于向会话管理网元发送所述第一应用服务器的地址。
基于与上述方法实施例相同构思，本申请实施例中还提供一种计算机可读存储介质，其上存储有计算机程序(或称指令)，该程序被处理器执行时，使该计算机执行上述方法实施例、方法实施例的任意一种可能的实现方式中由会话管理网元、第一用户面网元、第一应用服务器和/或策略控制网元执行的操作。
基于与上述方法实施例相同构思，本申请还提供一种计算机程序产品，该计算机程序产品在被计算机调用执行时，可以使得计算机实现上述方法实施例、方法实施例的任意一种可能的实现方式中由会话管理网元、第一用户面网元、第一应用服务器和/或策略控制网元执行的操作。
基于与上述方法实施例相同构思，本申请还提供一种芯片或芯片系统，该芯片与收发器耦合，用于实现上述方法实施例、方法实施例的任意一种可能的实现方式中由会话管理网元、第一用户面网元、第一应用服务器和/或策略控制网元执行的操作。该芯片系统可包括该芯片，以及包括存储器、通信接口等组件。
基于与上述方法实施例相同构思，本申请还提供一种通信系统，该通信系统可用于实现上述方法实施例、方法实施例的任意一种可能的实现方式中由会话管理网元、第一用户面网元、第一应用服务器和/或策略控制网元执行的操作。示例性的，该通信系统具有如图1至图3中任一所示结构。
本领域内的技术人员应明白，本申请的实施例可提供为方法、系统、或计算机程序产品。因此，本申请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、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
本申请是参照根据本申请的方法、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保护范围。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 (44)

  1. 一种通信方法，其特征在于，包括：
    会话管理网元确定第一策略规则和第二策略规则；所述第一策略规则用于指示第一用户面网元将第一应用的第一数据导向至第一应用服务器；所述第二策略规则用于所述第一用户面网元确定将所述第一应用的第二数据发送至第一会话关联的网元，其中，所述第一会话用于传输终端与第二应用服务器之间的所述第一应用的数据，所述第二数据来自于所述第一应用服务器，所述第二数据中包括所述第一应用服务器的地址，所述第二数据中包括所述第一会话的标识信息；
    所述会话管理网元向所述第一用户面网元发送所述第一策略规则以及所述第二策略规则；
    其中，所述第一策略规则中包括第一指示信息；
    所述第一指示信息用于所述第一用户面网元确定在所述第一数据中携带第二指示信息，所述第二指示信息用于所述第一应用服务器确定在所述第二数据中携带所述第一会话的标识信息；和/或，所述第一指示信息用于所述第一用户面网元确定在所述第二数据中携带所述第一会话的标识信息，所述第一会话的标识信息用于所述第一应用服务器确定在所述第二数据中携带所述第一会话的标识信息。
  2. 如权利要求1所述的方法，其特征在于，所述第一会话的标识信息为所述第一用户面网元为所述第一会话分配的标识或所述第一会话的地址信息。
  3. 如权利要求1或2所述的方法，其特征在于，所述第二策略规则中包括所述第一会话的标识信息，所述第一会话的标识信息用于所述第一用户面网元确定将所述第二数据发送至所述第一会话关联的网元。
  4. 如权利要求1-3中任一所述的方法，其特征在于，所述方法还包括：
    所述会话管理网元接收来自策略控制网元的第三指示信息，所述第三指示信息用于指示所述第一应用服务器终结所述第一应用的数据流；
    所述会话管理网元根据所述第三指示信息在所述第一策略规则中携带所述第一指示信息。
  5. 如权利要求1-3中任一所述的方法，其特征在于，所述方法还包括：
    所述会话管理网元接收来自策略控制网元的第四指示信息，所述第四指示信息用于指示所述第一应用服务器终结所述第一应用的数据流；
    所述会话管理网元根据所述第四指示信息在所述第一策略规则中携带所述第一会话的标识信息。
  6. 如权利要求1-5中任一所述的方法，其特征在于，所述第一会话关联的网元包括：
    所述第一会话的接入网网元，所述终端接入所述无线接入网网元；或者，
    第二用户面网元，所述第二用户面网元用于接入所述第二应用服务器；或者，
    分叉点网元，所述分叉点网元用于将所述第一数据发送至所述第一用户面网元；或者，
    上行分类器网元，所述上行分类器网元用于将所述第一数据发送至所述第一用户面网元。
  7. 一种通信方法，其特征在于，包括：
    第一用户面网元接收来自会话管理网元的第一策略规则以及第二策略规则；所述第一 策略规则用于指示所述第一用户面网元将所述第一应用的第一数据发送至第一应用服务器；
    所述第二策略规则用于指示第一用户面网元将所述第一应用的第二数据发送至第一会话关联的网元，所述第一会话用于传输终端与第二应用服务器之间的所述第一应用的数据，其中，所述第二数据来自于所述第一应用服务器，所述第二数据中包括所述第一应用服务器的地址；
    其中，所述第一策略规则中包括第一指示信息；
    所述第一指示信息用于所述第一用户面网元确定在所述第一数据中携带第二指示信息，所述第二指示信息用于指示所述第一应用服务器在所述第二数据中携带所述第一会话的标识信息；和/或，所述第一指示信息用于所述第一用户面网元确定在所述第二数据中携带所述第一会话的标识信息，所述第一会话的标识信息用于所述第一应用服务器确定在所述第二数据中携带所述第一会话的标识信息。
  8. 如权利要求7所述的方法，其特征在于，所述第一会话的标识信息为所述第一用户面网元为所述第一会话分配的标识或所述第一会话的地址信息。
  9. 如权利要求7或8所述的方法，其特征在于，所述第二策略规则中包括所述第一会话的标识信息，所述第一会话的标识信息用于所述第一用户面网元确定将所述第二数据发送至所述第一会话关联的网元。
  10. 如权利要求7-9中任一所述的方法，其特征在于，所述第一会话关联的网元包括：
    所述第一会话的接入网网元，所述终端接入所述无线接入网网元；或者，
    第二用户面网元，所述第二用户面网元用于接入所述第二应用服务器；或者，
    分叉点网元，所述分叉点网元用于将所述第一数据发送至所述第一用户面网元；或者，
    上行分类器网元，所述上行分类器网元用于将所述第一数据发送至所述第一用户面网元。
  11. 一种通信方法，其特征在于，包括：
    第一应用服务器接收来自第一用户面网元的第一应用的第一数据，所述第一数据中包括第二指示信息或第一会话的标识信息；
    所述第一应用服务器根据第二指示信息或第一会话的标识信息，在第二数据中携带第一会话的标识信息，所述第一会话用于传输终端与第二应用服务器之间的所述第一应用的数据，所述第二数据根据所述第一数据确定；
    所述第一应用服务器向所述第一用户面网元发送向所述第二数据。
  12. 如权利要求11所述的方法，其特征在于，所述第一会话的标识信息为所述第一用户面网元为所述第一会话分配的标识或所述第一会话的地址信息。
  13. 一种通信方法，其特征在于，包括：
    会话管理网元接收来自策略控制网元的第一应用服务器的地址；
    所述会话管理网元确定第一策略规则和第二策略规则；所述第一策略规则用于指示第一用户面网元将所述第一应用的第一数据导向至第一应用服务器；所述第二策略规则中包括所述第一应用服务器的地址，所述第一应用服务器的地址用于所述第一用户面网元确定将第二数据发送至第一会话关联的网元，所述第一会话用于传输终端与第二应用服务器之间的所述第一应用的数据，其中，所述第二数据来自于所述第一应用服务器，且所述第二数据中包括所述第一应用服务器的地址；
    所述会话管理网元向所述第一用户面网元发送所述第一策略规则以及所述第二策略规则。
  14. 如权利要求13所述的方法，其特征在于，所述第一会话关联的网元包括：
    所述第一会话的接入网网元，所述终端接入所述无线接入网网元；或者，
    第二用户面网元，所述第二用户面网元用于接入所述第二应用服务器；或者，
    分叉点网元，所述分叉点网元用于将所述第一数据发送至所述第一用户面网元；或者，
    上行分类器网元，所述上行分类器网元用于将所述第一数据发送至所述第一用户面网元。
  15. 一种通信方法，其特征在于，包括：
    第一用户面网元接收来自会话管理网元的第一策略规则和第二策略规则；
    其中，所述第一策略规则用于指示第一用户面网元将所述第一应用的第一数据导向至第一应用服务器；所述第二策略规则中包括所述第一应用服务器的地址，所述第一应用服务器的地址用于所述第一用户面网元确定将第二数据发送至第一会话关联的网元，所述第一会话用于传输终端与第二应用服务器之间的所述第一应用的数据，其中，所述第二数据来自于所述第一应用服务器，且所述第二数据中包括所述第一应用服务器的地址。
  16. 一种通信方法，其特征在于，包括：
    策略控制网元接收来自第一应用功能网元的请求消息，所述请求消息中包括终端的地址以及第一应用服务器的地址，所述第一应用服务器对应于所述第一应用，所述第一服务器与所述第一应用功能网元对应；
    所述策略控制网元根据所述终端的地址，确定所述请求消息与第一会话关联，所述第一会话用于传输所述终端与第二应用服务器之间的所述第一应用的数据，所述第二应用服务器对应于所述第一应用；
    所述策略控制网元向所述第一会话的会话管理网元发送所述第一应用服务器的地址。
  17. 一种通信方法，其特征在于，包括：
    策略控制网元接收来自第一应用功能网元的请求消息，所述请求消息中包括终端的地址以及第一应用服务器的地址，所述第一应用服务器对应于所述第一应用，所述第一服务器与所述第一应用功能网元对应；
    所述策略控制网元根据所述终端的地址，确定所述请求消息与第一会话关联，所述第一会话用于传输所述终端与第二应用服务器之间的所述第一应用的数据，所述第二应用服务器对应于所述第一应用；
    所述策略控制网元向会话管理网元发送所述第一应用服务器的地址；
    所述会话管理网元接收所述第一应用服务器的地址；
    所述会话管理网元确定第一策略规则和第二策略规则；所述第一策略规则用于指示第一用户面网元将所述第一应用的第一数据导向至所述第一应用服务器；所述第二策略规则中包括所述第一应用服务器的地址，所述第一应用服务器的地址用于所述第一用户面网元确定将第二数据发送至所述第一会话关联的网元，其中，所述第二数据来自于所述第一应用服务器，且所述第二数据中包括所述第一应用服务器的地址；
    所述会话管理网元向所述第一用户面网元发送所述第一策略规则以及所述第二策略规则。
  18. 一种通信装置，其特征在于，包括：
    处理模块，用于确定第一策略规则和第二策略规则；所述第一策略规则用于指示第一用户面网元将第一应用的第一数据导向至第一应用服务器；所述第二策略规则用于所述第一用户面网元确定将所述第一应用的第二数据发送至第一会话关联的网元，其中，所述第一会话用于传输终端与第二应用服务器之间的所述第一应用的数据，所述第二数据来自于所述第一应用服务器，所述第二数据中包括所述第一应用服务器的地址，所述第二数据中包括所述第一会话的标识信息；
    通信模块，用于向所述第一用户面网元发送所述第一策略规则以及所述第二策略规则；
    其中，所述第一策略规则中包括第一指示信息；
    所述第一指示信息用于所述第一用户面网元确定在所述第一数据中携带第二指示信息，所述第二指示信息用于所述第一应用服务器确定在所述第二数据中携带所述第一会话的标识信息；和/或，所述第一指示信息用于所述第一用户面网元确定在所述第二数据中携带所述第一会话的标识信息，所述第一会话的标识信息用于所述第一应用服务器确定在所述第二数据中携带所述第一会话的标识信息。
  19. 如权利要求18所述的通信装置，其特征在于，所述第一会话的标识信息为所述第一用户面网元为所述第一会话分配的标识或所述第一会话的地址信息。
  20. 如权利要求18或19所述的通信装置，其特征在于，所述第二策略规则中包括所述第一会话的标识信息，所述第一会话的标识信息用于所述第一用户面网元确定将所述第二数据发送至所述第一会话关联的网元。
  21. 如权利要求18-20中任一所述的通信装置，其特征在于，所述通信模块还用于：
    接收来自策略控制网元的第三指示信息，所述第三指示信息用于指示所述第一应用服务器终结所述第一应用的数据流；
    所述处理模块还用于：
    根据所述第三指示信息在所述第一策略规则中携带所述第一指示信息。
  22. 如权利要求18-20中任一所述的通信装置，其特征在于，所述通信模块还用于：
    接收来自策略控制网元的第四指示信息，所述第四指示信息用于指示所述第一应用服务器终结所述第一应用的数据流；
    所述处理模块还用于：
    根据所述第四指示信息在所述第一策略规则中携带所述第一会话的标识信息。
  23. 如权利要求18-22中任一所述的通信装置，其特征在于，所述第一会话关联的网元包括：
    所述第一会话的接入网网元，所述终端接入所述无线接入网网元；或者，
    第二用户面网元，所述第二用户面网元用于接入所述第二应用服务器；或者，
    分叉点网元，所述分叉点网元用于将所述第一数据发送至所述第一用户面网元；或者，
    上行分类器网元，所述上行分类器网元用于将所述第一数据发送至所述第一用户面网元。
  24. 一种通信装置，其特征在于，包括：
    通信模块，用于接收来自会话管理网元的第一策略规则以及第二策略规则；所述第一策略规则用于指示所述通信装置将所述第一应用的第一数据发送至第一应用服务器；
    所述第二策略规则用于指示通信装置将所述第一应用的第二数据发送至第一会话关联的网元，所述第一会话用于传输终端与第二应用服务器之间的所述第一应用的数据，其 中，所述第二数据来自于所述第一应用服务器，所述第二数据中包括所述第一应用服务器的地址；
    其中，所述第一策略规则中包括第一指示信息；
    所述第一指示信息用于所述通信装置确定在所述第一数据中携带第二指示信息，所述第二指示信息用于指示所述第一应用服务器在所述第二数据中携带所述第一会话的标识信息；和/或，所述第一指示信息用于所述通信装置确定在所述第二数据中携带所述第一会话的标识信息，所述第一会话的标识信息用于所述第一应用服务器确定在所述第二数据中携带所述第一会话的标识信息。
  25. 如权利要求24所述的通信装置，其特征在于，所述第一会话的标识信息为所述通信装置为所述第一会话分配的标识或所述第一会话的地址信息。
  26. 如权利要求24或25所述的通信装置，其特征在于，所述第二策略规则中包括所述第一会话的标识信息，所述第一会话的标识信息用于所述通信装置确定将所述第二数据发送至所述第一会话关联的网元。
  27. 如权利要求24-26中任一所述的通信装置，其特征在于，所述第一会话关联的网元包括：
    所述第一会话的接入网网元，所述终端接入所述无线接入网网元；或者，
    第二用户面网元，所述第二用户面网元用于接入所述第二应用服务器；或者，
    分叉点网元，所述分叉点网元用于将所述第一数据发送至所述通信装置；或者，
    上行分类器网元，所述上行分类器网元用于将所述第一数据发送至所述通信装置。
  28. 一种通信装置，其特征在于，包括：
    通信装置，用于接收来自第一用户面网元的第一应用的第一数据，所述第一数据中包括第二指示信息或第一会话的标识信息；
    处理模块，用于在第二数据中携带第一会话的标识信息，所述第一会话用于传输终端与第二应用服务器之间的所述第一应用的数据，所述第二数据根据所述第一数据确定；
    所述通信装置，还用于向所述第一用户面网元发送向所述第二数据。
  29. 如权利要求28所述的通信装置，其特征在于，所述第一会话的标识信息为所述第一用户面网元为所述第一会话分配的标识或所述第一会话的地址信息。
  30. 一种通信装置，其特征在于，包括：
    通信模块，用于接收来自策略控制网元的第一应用服务器的地址；
    处理模块，用于确定第一策略规则和第二策略规则；所述第一策略规则用于指示第一用户面网元将所述第一应用的第一数据导向至第一应用服务器；所述第二策略规则中包括所述第一应用服务器的地址，所述第一应用服务器的地址用于所述第一用户面网元确定将第二数据发送至第一会话关联的网元，所述第一会话用于传输终端与第二应用服务器之间的所述第一应用的数据，其中，所述第二数据来自于所述第一应用服务器，且所述第二数据中包括所述第一应用服务器的地址；
    所述通信模块，还用于向所述第一用户面网元发送所述第一策略规则以及所述第二策略规则。
  31. 如权利要求30所述的通信装置，其特征在于，所述第一会话关联的网元包括：
    所述第一会话的接入网网元，所述终端接入所述无线接入网网元；或者，
    第二用户面网元，所述第二用户面网元用于接入所述第二应用服务器；或者，
    分叉点网元，所述分叉点网元用于将所述第一数据发送至所述第一用户面网元；或者，
    上行分类器网元，所述上行分类器网元用于将所述第一数据发送至所述第一用户面网元。
  32. 一种通信装置，其特征在于，包括：
    通信模块，用于接收来自会话管理网元的第一策略规则和第二策略规则；
    其中，所述第一策略规则用于指示通信装置将所述第一应用的第一数据导向至第一应用服务器；所述第二策略规则中包括所述第一应用服务器的地址，所述第一应用服务器的地址用于所述通信装置确定将第二数据发送至第一会话关联的网元，所述第一会话用于传输终端与第二应用服务器之间的所述第一应用的数据，其中，所述第二数据来自于所述第一应用服务器，且所述第二数据中包括所述第一应用服务器的地址。
  33. 一种通信装置，其特征在于，包括：
    通信模块，用于接收来自第一应用功能网元的请求消息，所述请求消息中包括终端的地址以及第一应用服务器的地址，所述第一应用服务器对应于所述第一应用，所述第一服务器与所述第一应用功能网元对应；
    处理模块，用于根据所述终端的地址，确定所述请求消息与第一会话关联，所述第一会话用于传输所述终端与第二应用服务器之间的所述第一应用的数据，所述第二应用服务器对应于所述第一应用；
    所述通信模块，还用于向所述第一会话的会话管理网元发送所述第一应用服务器的地址。
  34. 一种通信系统，其特征在于，包括：
    策略控制网元，用于接收来自第一应用功能网元的请求消息，所述请求消息中包括终端的地址以及第一应用服务器的地址，所述第一应用服务器对应于所述第一应用，所述第一服务器与所述第一应用功能网元对应；
    所述策略控制网元，还用于根据所述终端的地址，确定所述请求消息与第一会话关联，所述第一会话用于传输所述终端与第二应用服务器之间的所述第一应用的数据，所述第二应用服务器对应于所述第一应用；
    所述策略控制网元，还用于向会话管理网元发送所述第一应用服务器的地址；
    所述会话管理网元，用于接收所述第一应用服务器的地址；
    所述会话管理网元，还用于确定第一策略规则和第二策略规则；所述第一策略规则用于指示第一用户面网元将所述第一应用的第一数据导向至所述第一应用服务器；所述第二策略规则中包括所述第一应用服务器的地址，所述第一应用服务器的地址用于所述第一用户面网元确定将第二数据发送至所述第一会话关联的网元，其中，所述第二数据来自于所述第一应用服务器，且所述第二数据中包括所述第一应用服务器的地址；
    所述会话管理网元，还用于向所述第一用户面网元发送所述第一策略规则以及所述第二策略规则；
    所述第一用户面网元，用于接收所述第一策略规则以及所述第二策略规则。
  35. 一种通信装置，其特征在于，包括存储器以及处理器，所述存储器中存储计算机程序或指令，所述处理器用于调用并执行所述计算机程序或指令，实现如权利要求1-6中任一所述的通信方法。
  36. 一种通信装置，其特征在于，包括存储器以及处理器，所述存储器中存储计算机 程序或指令，所述处理器用于调用并执行所述计算机程序或指令，实现如权利要求7-10中任一所述的通信方法。
  37. 一种通信装置，其特征在于，包括存储器以及处理器，所述存储器中存储计算机程序或指令，所述处理器用于调用并执行所述计算机程序或指令，实现如权利要求11或12所述的通信方法。
  38. 一种通信装置，其特征在于，包括存储器以及处理器，所述存储器中存储计算机程序或指令，所述处理器用于调用并执行所述计算机程序或指令，实现如权利要求13或14所述的通信方法。
  39. 一种通信装置，其特征在于，包括存储器以及处理器，所述存储器中存储计算机程序或指令，所述处理器用于调用并执行所述计算机程序或指令，实现如权利要求15所述的通信方法。
  40. 一种通信装置，其特征在于，包括存储器以及处理器，所述存储器中存储计算机程序或指令，所述处理器用于调用并执行所述计算机程序或指令，实现如权利要求16所述的通信方法。
  41. 一种通信系统，其特征在于，包括如权利要求18-23或35中任一所述的装置、如权利要求24-27或36中任一所述的装置、如权利要求28-29或37中任一所述的装置、如权利要求30-31或38中任一所述的装置、如权利要求32或39所述的装置、如权利要求33或40中任一所述的装置。
  42. 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程序或指令，当所述计算机程序或指令在计算机上运行时，使得计算机执行如权利要求1至16中任一项所述的通信方法。
  43. 一种包含指令的计算机程序产品，其特征在于，包括计算机程序或指令，当所述计算机程序或指令在计算机上运行时，使得计算机执行如权利要求1至16中任一项所述的通信方法。
  44. 一种电路，其特征在于，所述电路与存储器耦合，所述存储器存储有计算机程序或指令，所述处理器用于调用并执行所述计算机程序或指令时，实现如权利要求1至16中任一项所述的通信方法。
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