WO2023185015A1 - 通信方法、通信装置及通信系统 - Google Patents

通信方法、通信装置及通信系统 Download PDF

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Publication number
WO2023185015A1
WO2023185015A1 PCT/CN2022/133306 CN2022133306W WO2023185015A1 WO 2023185015 A1 WO2023185015 A1 WO 2023185015A1 CN 2022133306 W CN2022133306 W CN 2022133306W WO 2023185015 A1 WO2023185015 A1 WO 2023185015A1
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Prior art keywords
data network
data
dnai
network element
network routing
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PCT/CN2022/133306
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English (en)
French (fr)
Inventor
周晓云
朱奋勤
魏鑫鹏
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华为技术有限公司
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Priority claimed from CN202210482211.8A external-priority patent/CN116939712A/zh
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Publication of WO2023185015A1 publication Critical patent/WO2023185015A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing

Definitions

  • the present application relates to the field of wireless communication technology, and in particular to communication methods, communication devices and communication systems.
  • smart terminals support more and more applications, and users use smart terminals to access applications in application servers more and more frequently. Therefore, users have poor business experience when accessing applications. The requirements are also getting higher and higher.
  • This application provides communication methods, communication devices and communication systems to improve users' business experience when accessing applications.
  • embodiments of the present application provide a communication method, which can be executed by a user plane network element or a module (such as a chip) applied in the user plane network element.
  • the user plane network element determines the packet detection rule that matches the application's service data; the user plane network element performs forwarding on the service data corresponding to the forwarding action rule associated with the packet detection rule.
  • the forwarding strategy is used to perform LAN business flow steering for the business data, and perform data network routing business flow steering for the business data processed by the business function network elements deployed in the LAN to send the processed business data to Local data network.
  • the forwarding strategy determined by the user plane network element can first perform LAN business flow steering on the service data to improve the transmission quality and transmission bandwidth of the service data, and then process the service data after being processed by the service function network elements deployed in the LAN.
  • Execute data network routing business flow guidance to send processed business data to the local data network, thereby enabling users to access applications in the local data network nearby.
  • this solution improves the transmission quality and bandwidth of business data.
  • it enables users to access applications in local data packages nearby, thereby improving the transmission performance of business data and improving user experience.
  • the forwarding action rule includes a forwarding policy identifier, and the forwarding policy identifier is determined based on the LAN business flow steering policy identifier of the application and the data network routing business flow steering policy identifier of the application; wherein, the forwarding policy identifier
  • the application's LAN business flow steering policy identifier is used to perform LAN business flow steering for the business data.
  • the application's data network routing business flow steering policy identifier is used to perform data network routing business flow steering for the business data.
  • the application's data network The routing service flow steering policy identifier corresponds to the data network access identifier DNAI of the local data network.
  • a forwarding policy identifier can indicate not only the LAN business flow steering strategy, but also the data network routing service flow steering strategy. Therefore, the user plane network element only needs to determine the LAN business flow steering strategy based on the one forwarding policy identifier.
  • the forwarding strategy of policy and data network routing business flow guidance simplifies the operation of user plane network elements, reduces the complexity of the user plane, and can improve the performance of user plane network elements.
  • the user plane network element obtains the forwarding policy according to the forwarding policy identifier.
  • the forwarding action rule includes a forwarding policy identifier and data network routing information, and the forwarding policy identifier is determined based on the LAN business flow steering policy identifier of the application; wherein, the LAN business flow steering policy of the application
  • the identifier is used to perform LAN business flow guidance for the business data
  • the data network routing information is used to perform data network routing business flow guidance for the business data.
  • the data network routing information includes the address, port number or protocol number of the application server. At least one of the data network routing information corresponds to the DNAI of the local data network.
  • user plane network elements determine the forwarding strategy based on the forwarding strategy identifier and data network routing information, thereby improving the accuracy of the determined forwarding strategy, improving the speed and correctness of business data processing, and helping to improve user experience.
  • the forwarding action rule includes a forwarding policy identifier and data network routing information.
  • the forwarding policy identifier is determined based on the LAN business flow steering policy identifier of the application and the data network routing business flow steering policy identifier of the application. ; wherein, the LAN business flow steering policy identifier of the application is used to perform LAN business flow steering on the business data, and the data network routing business flow steering policy identifier of the application and the data network routing information are both used to perform LAN business flow steering on the business data.
  • Data network routing business flow guidance The application's data network routing business flow guidance policy identifier and the data network routing information correspond to the DNAI of the local data network.
  • the data network routing information includes the address, port number or At least one of the protocol numbers.
  • a forwarding policy identifier can indicate not only the LAN business flow steering strategy, but also the data network routing service flow steering strategy. Therefore, the user plane network element only needs to determine the LAN business flow steering strategy based on the one forwarding policy identifier.
  • the forwarding strategy of policy and data network routing business flow guidance simplifies the operation of user plane network elements, reduces the complexity of the user plane, and can improve the performance of user plane network elements.
  • user plane network elements can also determine the forwarding strategy based on the forwarding strategy identifier and data network routing information, thereby improving the accuracy of the determined forwarding strategy, improving the speed and correctness of business data processing, and helping to improve user experience.
  • the user plane network element obtains the forwarding policy based on the forwarding policy identifier and the data network routing information.
  • embodiments of the present application provide a communication method, which can be executed by a session management network element or a module (such as a chip) applied in the session management network element.
  • the session management network element receives PCC rules.
  • the PCC rules include the applied LAN business flow steering policy identification and data network routing control information.
  • the data network routing control information includes at least one data network interface. Enter the identification DNAI and the data network routing service flow steering policy identifier and/or data network routing information respectively corresponding to the at least one DNAI.
  • the LAN business flow steering policy identifier is used to perform LAN business flow steering for the service data of the application.
  • the data Both the network routing business flow steering policy identifier and the data network routing information are used to perform data network routing business flow steering for the application's business data.
  • the data network routing information includes the address, port number or protocol number of the application's server. At least one; the session management network element determines the forwarding action rule based on the LAN service flow steering policy identifier and the data network routing control information; the session management network element sends the forwarding action rule to the user plane network element.
  • the forwarding action rules sent by the session management network element to the user plane network element can be used to instruct the user plane network element to first perform LAN service flow steering on the service data, and then perform data network routing service flow steering on the processed service data.
  • this solution improves the transmission quality and bandwidth of business data.
  • it enables users to access applications in local data packages nearby, thereby improving the transmission performance of business data and improving user experience.
  • the session management network element determines forwarding action rules based on the LAN business flow steering policy identifier and the data network routing control information, including: the session management network element determines the target DNAI in the at least one DNAI. , the user plane network element corresponds to the target DNAI; the session management network element determines the forwarding policy identifier according to the LAN service flow steering policy identifier and the data network routing service flow steering policy identifier corresponding to the target DNAI; where, the forwarding action rule Include the forwarding policy identifier.
  • the forwarding policy identifier includes a first policy identifier and a second policy identifier, wherein the session management network element determines the first policy identifier according to the LAN business flow steering policy identifier, and routes the service flow according to the data network corresponding to the target DNAI. Direct the policy identifier to determine the second policy identifier.
  • the priority of the first policy identifier is higher than the priority of the second policy identifier. Therefore, the user plane network element determines the forwarding policy according to the first policy identifier and the second policy identifier.
  • the forwarding action rule also includes data network routing information corresponding to the target DNAI.
  • the forwarding policy identifier includes a first policy identifier and a second policy identifier, wherein the session management network element determines the first policy identifier according to the LAN business flow steering policy identifier, and routes the service flow according to the data network corresponding to the target DNAI. Direct the policy identifier to determine the second policy identifier.
  • the priority of the first policy identifier is higher than the priority of the second policy identifier.
  • the priority of the first policy identifier is higher than the data network routing information corresponding to the target DNAI. priority.
  • the user plane network element determines the forwarding strategy based on the first policy identifier and the second policy identifier, or the user plane network element determines the forwarding strategy based on the first policy identifier, the second policy identifier, and the data network routing information corresponding to the target DNAI.
  • the session management network element determines forwarding action rules based on the LAN business flow steering policy identifier and the data network routing control information, including: the session management network element determines the target DNAI in the at least one DNAI. , the user plane network element corresponds to the target DNAI; the session management network element determines the forwarding policy identifier according to the LAN service flow steering policy identifier; wherein the forwarding action rule includes the forwarding policy identifier and the data network route corresponding to the target DNAI information.
  • the priority of the forwarding policy identifier is higher than the priority of the data network routing information corresponding to the target DNAI. Therefore, the user plane network element determines the forwarding strategy based on the forwarding strategy identifier and the data network routing information corresponding to the target DNAI.
  • embodiments of the present application provide a communication method, which can be executed by a session management network element or a module (such as a chip) applied in the session management network element.
  • the session management network element receives PCC rules.
  • the PCC rules include data network routing control information and at least two data network access identifiers DNAI corresponding to the LAN business flow steering policy identifiers.
  • the network routing control information includes the at least two DNAIs and the data network routing service flow steering policy identifiers and/or data network routing information corresponding to the at least two DNAIs.
  • the LAN service flow steering policy identifier is used to execute the application's service data.
  • the LAN business flow steering, the data network routing business flow steering policy identifier and the data network routing information are used to perform data network routing business flow steering for the application's business data.
  • the data network routing information includes the address of the application's server, At least one of a port number or a protocol number; the session management network element determines forwarding action rules based on the data network routing control information and the LAN business flow steering policy identifiers corresponding to the at least two DNAIs; the session management network element determines the forwarding action rule to the user The network element sends the forwarding action rule.
  • the forwarding action rules sent by the session management network element to the user plane network element can be used to instruct the user plane network element to first perform LAN service flow steering on the service data, and then perform data network routing service flow steering on the processed service data.
  • this solution improves the transmission quality and bandwidth of business data.
  • it enables users to access applications in local data packages nearby, thereby improving the transmission performance of business data and improving user experience.
  • the session management network element determines the forwarding action rule based on the data network routing control information and the LAN service flow steering policy identifiers corresponding to the at least two DNAIs, including: the session management network element determines the Target DNAI in at least two DNAIs, the user plane network element corresponds to the target DNAI; the session management network element corresponds to the LAN service flow steering policy identifier corresponding to the target DNAI and the data network routing service flow steering policy identifier corresponding to the target DNAI , determine the forwarding policy identifier; wherein the forwarding action rule includes the forwarding policy identifier.
  • the forwarding policy identifier includes a first policy identifier and a second policy identifier, wherein the session management network element determines the first policy identifier according to the LAN service flow steering policy identifier corresponding to the target DNAI, and determines the first policy identifier according to the LAN service flow steering policy identifier corresponding to the target DNAI.
  • the data network routing service flow steering policy identifier determines the second policy identifier.
  • the priority of the first policy identifier is higher than the priority of the second policy identifier. Therefore, the user plane network element determines the forwarding policy according to the first policy identifier and the second policy identifier.
  • the forwarding action rule also includes data network routing information corresponding to the target DNAI.
  • the forwarding policy identifier includes a first policy identifier and a second policy identifier, wherein the session management network element determines the first policy identifier according to the LAN service flow steering policy identifier corresponding to the target DNAI, and determines the first policy identifier according to the LAN service flow steering policy identifier corresponding to the target DNAI.
  • the data network routing service flow steering policy identifier determines the second policy identifier.
  • the priority of the first policy identifier is higher than the priority of the second policy identifier.
  • the priority of the first policy identifier is higher than that corresponding to the target DNAI.
  • the priority of data network routing information is included in the target DNAI.
  • the user plane network element determines the forwarding strategy based on the first policy identifier and the second policy identifier, or the user plane network element determines the forwarding strategy based on the first policy identifier, the second policy identifier, and the data network routing information corresponding to the target DNAI.
  • the session management network element determines the forwarding action rule based on the data network routing control information and the LAN service flow steering policy identifiers corresponding to the at least two DNAIs, including: the session management network element determines the The user plane network element corresponds to the target DNAI in at least two DNAIs; the session management network element determines the forwarding policy identifier according to the LAN service flow steering policy identifier corresponding to the target DNAI; wherein the forwarding action rule includes the The forwarding policy identifier and the data network routing information corresponding to the target DNAI.
  • the priority of the forwarding policy identifier is higher than the priority of the data network routing information corresponding to the target DNAI. Therefore, the user plane network element determines the forwarding strategy based on the forwarding strategy identifier and the data network routing information corresponding to the target DNAI.
  • embodiments of the present application provide a communication method, which can be executed by a policy control network element or a module (such as a chip) applied in the policy control network element.
  • the policy control network element receives a service chain identifier, at least one DNAI, and a configuration identifier corresponding to the at least one DNAI.
  • the service chain identifier indicates a service chain, and the service chain is used to configure the application.
  • the business data of the application performs business chain processing, and the configuration identification is used to perform data network routing and service flow guidance for the application's business data; the policy control network element determines the configuration identification according to the service chain identification and the configuration identification corresponding to the at least one DNAI.
  • At least one DNAI corresponds to a business flow steering policy identifier, which is used to perform LAN business flow steering for the application's business data and perform data network routing business flow steering for the application's business data; the policy control network
  • the PCC rule is sent to the session management network element, where the PCC rule includes the at least one DNAI and the service flow steering policy identifier respectively corresponding to the at least one DNAI.
  • the configuration identifier corresponding to the at least one DNAI corresponds to the service flow steering policy identifier respectively corresponding to the at least one DNAI.
  • the policy control network element sends PCC rules to the session management network element.
  • the session management network element can instruct the user plane network element to first perform LAN service flow steering on the service data according to the PCC rules, and then perform data processing on the processed service data.
  • Network routing business flow guidance to enable users to access applications in the local data network nearby.
  • this solution improves the transmission quality and bandwidth of business data.
  • it enables users to access applications in local data packages nearby, thereby improving the transmission performance of business data and improving user experience.
  • the policy control network element receives the data network routing information corresponding to the at least one DNAI.
  • the data network routing information is used to perform data network routing business flow guidance for the service data of the application.
  • the data network The routing information includes at least one of the address, port number or protocol number of the application server; the PCC rule also includes data network routing information corresponding to the at least one DNAI.
  • embodiments of the present application provide a communication method, which can be executed by a policy control network element or a module (such as a chip) applied in the policy control network element.
  • the policy control network element receives at least two DNAIs, the configuration identifiers corresponding to the at least two DNAIs and the service chain identifiers corresponding to the at least two DNAIs.
  • the service chain identifier indicates a The service chain is used to perform service chain processing on the service data of the application.
  • the configuration identifier is used to perform data network routing and service flow guidance on the service data of the application; the policy control network element corresponds to each other according to the at least two DNAIs.
  • the business chain identifier and the configuration identifier corresponding to the at least two DNAIs respectively determine the business flow steering policy identifier corresponding to the at least two DNAIs.
  • the business flow steering policy identifier is used to perform LAN business flow steering for the business data of the application. and perform data network routing service flow steering for the application's service data; the policy control network element sends the PCC rule to the session management network element.
  • the PCC rule includes the at least two DNAIs and the service flows corresponding to the at least two DNAIs.
  • Steering strategy identifier is used to perform LAN business flow steering for the business data of the application. and perform data network routing service flow steering for the application's service data; the policy control network element sends the PCC rule to the session management network element.
  • the PCC rule includes the at least two DNAIs and the service flows corresponding to the at least two DNAIs.
  • Steering strategy identifier is included in one-to-one correspondence with the service flow steering policy identifiers respectively corresponding to
  • the policy control network element sends PCC rules to the session management network element.
  • the session management network element can instruct the user plane network element to first perform LAN service flow steering on the service data according to the PCC rules, and then perform data processing on the processed service data.
  • Network routing business flow guidance to enable users to access applications in the local data network nearby.
  • this solution improves the transmission quality and bandwidth of business data.
  • it enables users to access applications in local data packages nearby, thereby improving the transmission performance of business data and improving user experience.
  • the policy control network element receives the data network routing information respectively corresponding to the at least two DNAIs.
  • the data network routing information is used to perform data network routing business flow guidance for the service data of the application.
  • the data The network routing information includes at least one of the address, port number, or protocol number of the application server; the PCC rule also includes data network routing information corresponding to the at least two DNAIs.
  • embodiments of the present application provide a communication method, which can be executed by a user plane network element or a module (such as a chip) applied in the user plane network element.
  • the user plane network element determines the first packet detection rule that matches the applied service data; the user plane network element executes the first packet detection rule associated with the first packet detection rule on the service data.
  • the first forwarding policy corresponding to the forwarding action rule is used to perform LAN service flow steering for the service data; the user plane network element determines the service data that matches the service data processed by the service function network element deployed on the LAN.
  • the second packet detection rule the user plane network element executes the second forwarding strategy corresponding to the second forwarding action rule associated with the second packet detection rule on the processed service data, and the second forwarding strategy is used to process the second packet detection rule.
  • the processed service data is routed by the data network and the service flow is directed to send the processed service data to the local data network.
  • the first forwarding strategy determined by the user plane network element can implement LAN service flow guidance for service data and improve the transmission quality and transmission bandwidth of service data.
  • the second forwarding strategy determined by the user plane network element can perform data network routing and service flow steering on the service data processed by the service function network element deployed in the LAN, so as to send the processed service data to the local data network, thereby realizing user Access applications on local data networks nearby.
  • this solution improves the transmission quality and bandwidth of business data.
  • it enables users to access applications in local data packages nearby, thereby improving the transmission performance of business data and thus improving user experience.
  • the first forwarding action rule includes a first policy identifier, and the first policy identifier is determined based on the LAN business flow steering policy identifier of the application; wherein, the LAN business flow steering policy identifier of the application Used to perform LAN business flow steering for this business data.
  • the above solution indicates the first forwarding strategy through the first policy identifier in the first forwarding action rule, and the user plane network element can obtain the first forwarding strategy based on the first policy identifier, which helps to achieve accurate acquisition of the forwarding strategy, thereby achieving The correct transmission of business data helps improve the transmission performance of business data and improve user experience.
  • the user plane network element obtains the first forwarding policy according to the first policy identifier.
  • the second forwarding action rule includes a second policy identifier and/or data network routing information.
  • the second policy identifier is determined based on the data network routing service flow steering policy identifier of the application.
  • the application The data network routing business flow steering policy identifier is used to perform data network routing business flow steering for the business data.
  • the data network routing information is used to perform data network routing business flow steering for the business data.
  • the data network routing information includes the application. At least one of the address, port number or protocol number of the server, the data network routing service flow steering policy identifier of the application, and the data network routing information all correspond to the data network access identifier DNAI of the local data network.
  • the above solution indicates the second forwarding strategy through the second policy identifier in the second forwarding action rule.
  • the user plane network element can obtain the second forwarding strategy based on the second policy identifier, which helps to achieve accurate acquisition of the forwarding strategy, thereby achieving The correct transmission of business data helps improve the transmission performance of business data and improve user experience.
  • the user plane network element obtains the second forwarding policy based on the second policy identifier and/or the data network routing information.
  • embodiments of the present application provide a communication method, which can be executed by a session management network element or a module (such as a chip) applied in the session management network element.
  • the session management network element receives PCC rules.
  • the PCC rules include the applied LAN business flow steering policy identification and data network routing control information.
  • the data network routing control information includes at least one data network interface. Enter the identification DNAI and the data network routing service flow steering policy identifier and/or data network routing information respectively corresponding to the at least one DNAI.
  • the LAN business flow steering policy identifier is used to perform LAN business flow steering for the service data of the application.
  • the data Both the network routing business flow steering policy identifier and the data network routing information are used to perform data network routing business flow steering for the application's business data.
  • the data network routing information includes the address, port number or protocol number of the application's server. At least one; the session management network element determines the first forwarding action rule based on the LAN service flow steering policy identifier; the session management network element determines the second forwarding action rule based on the data network routing control information; the session management network element determines the first forwarding action rule based on the data network routing control information; The user plane network element sends the first forwarding action rule and the second forwarding action rule.
  • the first forwarding action rule sent by the session management network element to the user plane network element is used by the user plane network element to first perform LAN service flow guidance on the service data
  • the second forwarding action sent by the session management network element to the user plane network element Rules are used by user plane network elements to perform data network routing and business flow guidance on processed service data, so that users can access applications in the local data network nearby.
  • this solution improves the transmission quality and bandwidth of business data.
  • it enables users to access applications in local data packages nearby, thereby improving the transmission performance of business data and improving user experience.
  • the session management network element determines the first forwarding action rule according to the LAN business flow steering policy identifier, including: the session management network element determines the first policy identifier according to the LAN business flow steering policy identifier. , the first policy identifier is used to indicate the first forwarding policy; wherein the first forwarding action rule includes the first policy identifier.
  • the above solution indicates the first forwarding strategy through the first policy identifier in the first forwarding action rule, and the user plane network element can obtain the first forwarding strategy based on the first policy identifier, which helps to achieve accurate acquisition of the forwarding strategy, thereby achieving The correct transmission of business data helps improve the transmission performance of business data and improve user experience.
  • the data network routing control information includes at least one DNAI and a data network routing service flow steering policy identifier corresponding to the at least one DNAI; the session management network element determines the third routing policy based on the data network routing control information.
  • Forwarding action rules including: the session management network element determines the target DNAI in the at least one DNAI, and the user plane network element corresponds to the target DNAI; the session management network element determines the data network routing service flow steering policy according to the target DNAI.
  • the identifier determines a second policy identifier, and the second policy identifier is used to indicate a second forwarding strategy; wherein the second forwarding action rule includes the second policy identifier.
  • the above solution indicates the second forwarding strategy through the second policy identifier in the second forwarding action rule.
  • the user plane network element can obtain the second forwarding strategy based on the second policy identifier, which helps to achieve accurate acquisition of the forwarding strategy, thereby achieving The correct transmission of business data helps improve the transmission performance of business data and improve user experience.
  • the data network routing control information includes at least one data network access identifier DNAI and the data network routing information corresponding to the at least one DNAI; the session management network element determines based on the data network routing control information.
  • the second forwarding action rule includes: the session management network element determines the target DNAI in the at least one DNAI, and the user plane network element corresponds to the target DNAI; wherein the second forwarding action rule includes the data network route corresponding to the target DNAI Information, the data network routing information corresponding to the target DNAI is used to indicate the second forwarding strategy.
  • the above solution indicates the second forwarding strategy through the data network routing information in the second forwarding action rule.
  • the user plane network element can obtain the second forwarding strategy based on the data network routing information, which helps to achieve accurate acquisition of the forwarding strategy, thereby achieving The correct transmission of business data helps improve the transmission performance of business data and improve user experience.
  • the data network routing control information includes at least one data network access identifier DNAI and the data network routing service flow steering policy identifier and data network routing information respectively corresponding to the at least one DNAI;
  • the session management network element Determining the second forwarding action rule according to the data network routing control information includes: the session management network element determines the target DNAI in the at least one DNAI, and the user plane network element corresponds to the target DNAI; the session management network element determines the target DNAI according to the target The data network routing service flow steering policy identification corresponding to the DNAI determines the second policy identification; wherein the second forwarding action rule includes the second policy identification and the data network routing information corresponding to the target DNAI, and the second policy identification and the The data network routing information corresponding to the target DNAI is used to indicate the second forwarding strategy.
  • the above solution indicates the second forwarding strategy through the second policy identifier and data network routing information in the second forwarding action rule, and the user plane network element can obtain the second forwarding strategy based on the second policy identifier and data network routing information, which is helpful. It is used to accurately obtain the forwarding strategy, thereby realizing the correct transmission of business data, which helps to improve the transmission performance of business data and improve the user experience.
  • embodiments of the present application provide a communication method, which can be executed by a session management network element or a module (such as a chip) applied in the session management network element.
  • the session management network element receives PCC rules.
  • the PCC rules include data network routing control information and at least two data network access identifiers DNAI corresponding to the LAN business flow steering policy identifiers.
  • the network routing control information includes the at least two DNAIs and the data network routing service flow steering policy identifiers and/or data network routing information corresponding to the at least two DNAIs.
  • the LAN service flow steering policy identifier is used to execute the application's service data.
  • the LAN business flow steering, the data network routing business flow steering policy identifier and the data network routing information are used to perform data network routing business flow steering for the application's business data.
  • the data network routing information includes the address of the application's server, At least one of a port number or a protocol number; the session management network element determines the first forwarding action rule according to the LAN business flow steering policy identifiers corresponding to the at least two DNAIs; the session management network element determines the first forwarding action rule according to the data network routing control information , determine the second forwarding action rule; the session management network element sends the first forwarding action rule and the second forwarding action rule to the user plane network element.
  • the first forwarding action rule sent by the session management network element to the user plane network element is used by the user plane network element to first perform LAN service flow guidance on the service data
  • the second forwarding action sent by the session management network element to the user plane network element Rules are used by user plane network elements to perform data network routing and business flow guidance on processed service data, so that users can access applications in the local data network nearby.
  • this solution improves the transmission quality and bandwidth of business data.
  • it enables users to access applications in local data packages nearby, thereby improving the transmission performance of business data and improving user experience.
  • this solution can provide multiple LAN business flow steering policy identifiers, and select the LAN business flow steering policy identifier to be used from multiple LAN business flow steering policy identifiers, which helps to improve the accuracy of the forwarding strategy and thereby improve the delivery of business data. Speed and accuracy further enhance user experience.
  • the session management network element determines the first forwarding action rule based on the LAN service flow steering policy identifiers respectively corresponding to the at least two DNAIs, including: the session management network element determines the first forwarding action rule among the at least two DNAIs.
  • the target DNAI, the user plane network element corresponds to the target DNAI; the session management network element determines the first policy identifier according to the LAN service flow steering policy identifier corresponding to the target DNAI, and the first policy identifier is used to indicate the first forwarding strategy ;
  • the first forwarding action rule includes the first policy identifier.
  • the above solution indicates the first forwarding strategy through the first policy identifier in the first forwarding action rule, and the user plane network element can obtain the first forwarding strategy based on the first policy identifier, which helps to achieve accurate acquisition of the forwarding strategy, thereby achieving The correct transmission of business data helps improve the transmission performance of business data and improve user experience.
  • the data network routing control information includes at least one DNAI and a data network routing service flow steering policy identifier corresponding to the at least one DNAI; the session management network element determines the third routing policy based on the data network routing control information.
  • Forwarding action rules including: the session management network element determines the target DNAI in the at least one DNAI, and the user plane network element corresponds to the target DNAI; the session management network element determines the data network routing service flow steering policy according to the target DNAI.
  • the identifier determines a second policy identifier, and the second policy identifier is used to indicate a second forwarding strategy; wherein the second forwarding action rule includes the second policy identifier.
  • the above solution indicates the second forwarding strategy through the second policy identifier in the second forwarding action rule.
  • the user plane network element can obtain the second forwarding strategy based on the second policy identifier, which helps to achieve accurate acquisition of the forwarding strategy, thereby achieving The correct transmission of business data helps improve the transmission performance of business data and improve user experience.
  • the data network routing control information includes at least one data network access identifier DNAI and the data network routing information corresponding to the at least one DNAI; the session management network element determines based on the data network routing control information.
  • the second forwarding action rule includes: the session management network element determines the target DNAI in the at least one DNAI, and the user plane network element corresponds to the target DNAI; wherein the second forwarding action rule includes the data network route corresponding to the target DNAI Information, the data network routing information corresponding to the target DNAI is used to indicate the second forwarding strategy.
  • the above solution indicates the second forwarding strategy through the data network routing information in the second forwarding action rule.
  • the user plane network element can obtain the second forwarding strategy based on the data network routing information, which helps to achieve accurate acquisition of the forwarding strategy, thereby achieving The correct transmission of business data helps improve the transmission performance of business data and improve user experience.
  • the data network routing control information includes at least one data network access identifier DNAI and the data network routing service flow steering policy identifier and data network routing information respectively corresponding to the at least one DNAI;
  • the session management network element Determining the second forwarding action rule according to the data network routing control information includes: the session management network element determines the target DNAI in the at least one DNAI, and the user plane network element corresponds to the target DNAI; the session management network element determines the target DNAI according to the target The data network routing service flow steering policy identification corresponding to the DNAI determines the second policy identification; wherein the second forwarding action rule includes the second policy identification and the data network routing information corresponding to the target DNAI, and the second policy identification and the The data network routing information corresponding to the target DNAI is used to indicate the second forwarding strategy.
  • the above solution indicates the second forwarding strategy through the second policy identifier and data network routing information in the second forwarding action rule, and the user plane network element can obtain the second forwarding strategy based on the second policy identifier and data network routing information, which is helpful. It is used to accurately obtain the forwarding strategy, thereby realizing the correct transmission of business data, which helps to improve the transmission performance of business data and improve the user experience.
  • embodiments of the present application provide a communication device, which may be a user plane network element or a chip used for the user plane network element.
  • the device has the function of realizing any implementation method of the above-mentioned first aspect or sixth aspect. This function can be implemented by hardware, or it can be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • inventions of the present application provide a communication device.
  • the device may be a session management network element, or may be a chip used for the session management network element.
  • the device has the function of realizing any implementation method of the above-mentioned second aspect, third aspect, seventh aspect or eighth aspect. This function can be implemented by hardware, or it can be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • inventions of the present application provide a communication device.
  • the device may be a policy control network element, or may be a chip used for the policy control network element.
  • the device has the function of realizing any implementation method of the fourth aspect or the fifth aspect. This function can be implemented by hardware, or it can be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • an embodiment of the present application provides a communication device, including units or means for executing each step of any implementation method in the above-mentioned first to eighth aspects.
  • embodiments of the present application provide a communication device, including a processor and an interface circuit.
  • the processor is configured to communicate with other devices through the interface circuit and perform any implementation method in the above-mentioned first to eighth aspects.
  • the processor includes one or more.
  • embodiments of the present application provide a communication device, including a processor coupled to a memory, and the processor is configured to call a program stored in the memory to execute any implementation of the above-mentioned first to eighth aspects. method.
  • the memory may be located within the device or external to the device.
  • the processor can be one or more.
  • embodiments of the present application provide a communication device, including a processor and a memory; the memory is used to store computer instructions, and when the device is running, the processor executes the computer instructions stored in the memory, so that the device Execute any implementation method in the above-mentioned first to eighth aspects.
  • embodiments of the present application further provide a computer-readable storage medium in which instructions are stored, and when run on a communication device, the instructions in the above-mentioned first to eighth aspects are implemented. Any implementation method of is executed.
  • embodiments of the present application further provide a computer program product.
  • the computer program product includes a computer program or instructions.
  • the computer program or instructions are run by a communication device, any one of the above-mentioned first to eighth aspects is enabled.
  • the implementation method is executed.
  • embodiments of the present application further provide a chip system, including: a processor configured to execute any of the implementation methods in the first to eighth aspects.
  • embodiments of the present application further provide a communication system, which includes a user plane network element and a session management network element.
  • the user plane network element is used to receive forwarding action rules from the session management network element.
  • the session management network element is used to perform any implementation method of the second aspect.
  • embodiments of the present application also provide a communication system, which includes a user plane network element and a session management network element.
  • the user plane network element is used to receive forwarding action rules from the session management network element.
  • the session management network element is used to perform any implementation method of the third aspect.
  • embodiments of the present application further provide a communication system, which includes a session management network element and a policy control network element.
  • the session management network element is used to receive PCC rules from the policy control network element.
  • the policy controls network elements and is used to perform any implementation method of the fourth aspect.
  • embodiments of the present application further provide a communication system, which includes a session management network element and a policy control network element.
  • the session management network element is used to receive PCC rules from the policy control network element.
  • the policy controls network elements and is used to perform any implementation method of the fifth aspect.
  • embodiments of the present application also provide a communication system, which includes a user plane network element and a session management network element.
  • the user plane network element is configured to receive a first forwarding action rule and a second forwarding action rule from the session management network element.
  • the session management network element is used to perform any implementation method of the seventh aspect.
  • embodiments of the present application also provide a communication system, which includes a user plane network element and a session management network element.
  • the user plane network element is configured to receive a first forwarding action rule and a second forwarding action rule from the session management network element.
  • the session management network element is used to perform any implementation method of the eighth aspect.
  • Figure 1 is a schematic diagram of the 5G network architecture based on service-based architecture
  • Figure 2 is a schematic flow chart of a communication method provided by an embodiment of the present application.
  • Figure 3 is a schematic diagram of the business data processing process provided by the embodiment of the present application.
  • Figure 4(a) is a schematic flow chart of the communication method provided by the embodiment of the present application.
  • Figure 4(b) is a schematic flow chart of the communication method provided by the embodiment of the present application.
  • Figure 5(a) is a schematic flow chart of the communication method provided by the embodiment of the present application.
  • Figure 5(b) is a schematic flow chart of the communication method provided by the embodiment of the present application.
  • Figure 6 is a schematic flow chart of a communication method provided by an embodiment of the present application.
  • Figure 7 is a schematic flowchart of a communication method provided by an embodiment of the present application.
  • Figure 8 is a schematic flow chart of a communication method provided by an embodiment of the present application.
  • Figure 9 is a schematic flowchart of a communication method provided by an embodiment of the present application.
  • Figure 10 is a schematic flow chart of a communication method provided by an embodiment of the present application.
  • Figure 11 is a schematic flowchart of a communication method provided by an embodiment of the present application.
  • Figure 12 is a schematic flowchart of a communication method provided by an embodiment of the present application.
  • Figure 13(a) is a schematic flow chart of the communication method provided by the embodiment of the present application.
  • Figure 13(b) is a schematic flow chart of the communication method provided by the embodiment of the present application.
  • Figure 14 is a schematic flow chart of the communication method provided by the embodiment of the present application.
  • Figure 15 is a schematic flow chart of the communication method provided by the embodiment of the present application.
  • Figure 16 is a schematic flow chart of the communication method provided by the embodiment of the present application.
  • Figure 17 is a schematic diagram of a communication device provided by an embodiment of the present application.
  • Figure 18 is a schematic diagram of a communication device provided by an embodiment of the present application.
  • Figure 1 is a schematic diagram of the 5G network architecture based on service-based architecture.
  • the 5G network architecture shown in Figure 1 can include terminal equipment, access network and core network. Terminal equipment is connected to the data network (DN) through the access network and core network.
  • DN data network
  • the terminal equipment can be user equipment (UE), mobile station, mobile terminal, etc.
  • the terminal device is a UE as an example.
  • Terminal devices can be widely used in various scenarios, such as device-to-device (D2D), vehicle to everything (V2X) communication, machine-type communication (MTC), and the Internet of Things (internet of things, IOT), virtual reality, augmented reality, industrial control, autonomous driving, telemedicine, smart grid, smart furniture, smart office, smart wear, smart transportation, smart city, etc.
  • Terminal devices can be mobile phones, tablets, computers with wireless transceiver functions, wearable devices, vehicles, urban air vehicles (such as drones, helicopters, etc.), ships, robots, robotic arms, smart home devices, etc.
  • the following description takes the UE as an example of a terminal device.
  • the UE appearing anywhere subsequently can also be replaced with a terminal device or other examples of a terminal device.
  • the access network is used to implement access-related functions. It can provide network access functions for authorized users in a specific area, and can determine transmission links of different qualities to transmit user data based on user levels, business needs, etc.
  • the access network forwards control signals and user data between the UE and the core network.
  • the access network may include access network equipment, which may be equipment that provides access for UEs, and may include wireless access network (radio access network, RAN) equipment and wired access network equipment.
  • RAN equipment is mainly responsible for wireless resource management, quality of service (QoS) management, data compression and encryption on the air interface side.
  • RAN equipment can include various forms of base stations, such as macro base stations, micro base stations (also called small stations), relay stations, access points, balloon stations, etc.
  • the names of equipment with base station functions may be different.
  • RAN next-generation Node base station
  • gNB next-generation Node base station
  • LTE long term evolution
  • eNB evolved NodeB
  • the access network equipment and UE can be fixed-positioned or mobile. Access network equipment and UE can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; they can also be deployed on aircraft, balloons and satellites in the sky.
  • the embodiments of this application do not limit the application scenarios of access network equipment and UE.
  • the core network is responsible for maintaining the subscription data of the mobile network and providing functions such as session management, mobility management, policy management, and security authentication for UEs.
  • the core network includes but is not limited to one or more of the following network elements: application function (AF) network element, unified data management (UDM) network element, unified data repository (UDR) network element , policy control function (PCF) network element, session management function (SMF) network element, access and mobility management function (AMF) network element, network storage function ( network repository function (NRF) network element, authentication server function (AUSF) network element, network exposure function (NEF) network element, user plane function (UPF) network element.
  • AF application function
  • UDM unified data management
  • UDR unified data repository
  • PCF policy control function
  • SMF session management function
  • AMF access and mobility management function
  • NRF network storage function
  • AUSF authentication server function
  • NEF network exposure function
  • UPF user plane function
  • the AMF network element is mainly responsible for mobility management in mobile networks, such as user location update, user registration network, user switching, etc.
  • the SMF network element is mainly responsible for session management in mobile networks, such as session establishment, modification, and release. Specific functions include assigning Internet Protocol (IP) addresses to users, selecting UPF that provides message forwarding functions, etc.
  • IP Internet Protocol
  • the UPF network element is mainly responsible for forwarding and receiving user data. It can receive user data from the data network and transmit it to the UE through the access network device. It can also receive user data from the UE through the access network device and forward it to the data network.
  • UDM network elements include functions such as execution and management of contract data and user access authorization.
  • the UDR network element includes access functions for executing contract data, policy data, application data and other types of data.
  • NEF network elements are mainly used to support the opening of capabilities and events.
  • AF network element transmits the requirements from the application side to the network side, such as QoS requirements or user status event subscriptions.
  • AF can be a third-party functional entity or an application service deployed by an operator, such as IP Multimedia Subsystem (IMS) voice call service.
  • IMS IP Multimedia Subsystem
  • the PCF network element mainly supports providing a unified policy framework to control network behavior, provides policy rules to the control layer network functions, and is also responsible for obtaining user subscription information related to policy decisions.
  • PCF network elements can provide policies, such as QoS policies, slice selection policies, etc., to AMF network elements and SMF network elements.
  • NRF network elements can be used to provide network element discovery functions and provide network element information corresponding to network element types based on requests from other network elements.
  • NRF also provides network element management services, such as network element registration, update, de-registration, network element status subscription and push, etc.
  • the AUSF network element is responsible for authenticating the UE and verifying the legitimacy of the UE.
  • DN on which a variety of services can be deployed, can provide data and/or voice services to UEs.
  • DN is a private network of a smart factory.
  • the sensors installed in the workshop of the smart factory can be UEs.
  • the control server of the sensor is deployed in the DN, and the control server can provide services for the sensor.
  • 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 the internal office network of a company.
  • the mobile phones or computers of employees of the company can be UE.
  • the employees' mobile phones or computers can access information and data resources on the company's internal office network.
  • the DN in the embodiment of this application includes a local data network (Local Data Network).
  • the local data network can provide service data to users located in a specific area to optimize access paths, and can enable UEs to access service data of applications nearby.
  • AF network element UDM network element, UDR network element, PCF network element, SMF network element, AMF network element, NRF network element, AUSF network element, NEF network element, UPF network element can also be referred to as AF and UDM respectively.
  • UDR, PCF, SMF, AMF, NRF, AUSF, NEF UPF.
  • Nausf, Nnef, Nnrf, Namf, Npcf, Nsmf, Nudm, Nudr, and Naf are the service interfaces provided by the above-mentioned AUSF, NEF, NRF, AMF, PCF, SMF, UDM, UDR, and AF respectively, and are used to call the corresponding service operations.
  • N1, N2, N3, N4 and N6 are interface serial numbers. The meanings of these interface serial numbers are as follows:
  • N1 The interface between AMF and UE can be used to transmit non-access stratum (NAS) signaling (such as QoS rules from AMF) to UE.
  • NAS non-access stratum
  • N2 The interface between AMF and access network equipment can be used to transmit wireless bearer control information from the core network side to the access network equipment, etc.
  • N3 The interface between the access network equipment and UPF, mainly used to transmit uplink and downlink user plane data between the access network equipment and UPF.
  • N4 The interface between SMF and UPF can be used to transfer information between the control plane and the user plane, including controlling the delivery of forwarding rules, QoS rules, traffic statistics rules, etc. for the user plane, as well as user plane information. Report.
  • N6 The interface between UPF and DN, used to transmit uplink and downlink user data flows between UPF and DN.
  • the above network elements or functions can be network elements in hardware devices, software functions running on dedicated hardware, or virtualization functions instantiated on a platform (for example, a cloud platform).
  • a platform for example, a cloud platform.
  • the above network element or function can be implemented by one device, can be implemented by multiple devices, or can be a functional module in one device, which is not specifically limited in the embodiments of this application.
  • the solution of the embodiment of this application can be applied to the 5G network architecture shown in Figure 1, and can also be applied to the network architecture of future communications, such as the sixth generation (the 6th generation, 6G) network, and this application is not limited to this.
  • the user plane network elements, session management network elements, and policy control network elements in this application can be UPF network elements, SMF network elements, and PCF network elements in the 5G system respectively, or they can also be the above-mentioned UPF network elements in future communications such as 6G networks.
  • This application is not limited to network elements with the functions of network elements, SMF network elements, and PCF network elements.
  • the UPF network element, the SMF network element, and the PCF network element are respectively used as an example of the user plane network element, the session management network element, and the policy control network element for description.
  • the UPF network element, SMF network element, and PCF network element are referred to as UPF, SMF, and PCF respectively.
  • FIG. 2 is a schematic flowchart of a communication method provided by an embodiment of the present application. The method includes the following steps:
  • Step 201 UPF determines the packet detection rule (Packet Detection Rule, PDR) that matches the application's business data.
  • PDR Packet Detection Rule
  • UPF receives the application's service data (such as uplink service data), and then UPF matches the service data based on multiple PDRs on UPF and determines a PDR.
  • service data such as uplink service data
  • the PDR includes the source interface of the incoming packet (Source Interface of incoming packet), and also includes the service data flow filter (SDF Filter) or application identifier. Therefore, the PDR can be used to carry the information in the header of the data packet. information is matched to determine the PDR applicable to the packet.
  • Business data flow filters can be five-tuple information.
  • the value of the source interface of the incoming data packet is Access (indicating upstream).
  • the service data flow filter or application identifier may be determined by the SMF according to the service flow template in the PCC rule received from the PCF. A unified description is given here and will not be repeated later.
  • the source interface of the incoming data packet can also be called the source interface of the received data packet. It is described here uniformly and will not be described in detail later.
  • Step 202 UPF executes the forwarding policy corresponding to the forwarding action rule associated with the packet detection rule on the service data.
  • the forwarding policy is also called a routing policy, a sending policy or a transmission policy, etc., which will be explained here uniformly and will not be described in detail later.
  • Each PDR is associated with a Forwarding Action Rule (FAR), so after UPF determines the PDR that matches the business data, it can determine the FAR associated with the PDR, and then determine the forwarding policy corresponding to the FAR.
  • FAR Forwarding Action Rule
  • multiple forwarding policies are preconfigured on UPF, and different FARs correspond to different forwarding policies.
  • each application data flow corresponds to one PDR or multiple PDRs (there can be different PDRs according to the source interface and other information of different incoming data packets).
  • Each PDR is associated with a FAR, and each FAR corresponds to A forwarding strategy. Therefore, UPF implements different forwarding strategies for business data of different applications.
  • the forwarding policy configured on UPF is a policy pre-negotiated between the application and the network or pre-configured according to the operator's policy.
  • the forwarding policies negotiated between different applications and networks can be the same or different.
  • the forwarding policy is used to perform LAN business flow steering on the application's business data, and perform data network routing business flow steering on the business data processed by the business function network elements deployed on the LAN to send the processed business data to the local data network.
  • the local data network is the data network where the server of the application is located, so sending the processed business data to the local data network means sending the processed business data to the server of the application in the local data network.
  • UPF can be executed in the following two ways according to the forwarding policy:
  • UPF performs two processes in sequence according to the forwarding policy, namely Process 1 and Process 2 below.
  • UPF performs LAN service flow steering for the application's service data.
  • UPF implements LAN business flow guidance, which refers to directing the application's business data to the service function network element in the LAN, and the service function network element performs business chain processing on the application's service data.
  • the guidance here refers to sending.
  • local area network traffic steering is also called N6-LAN traffic steering (N6-LAN traffic steering).
  • UPF After being processed by the service function network element deployed in the LAN, UPF obtains the processed service data, and then performs the following processing 2 on the processed service data.
  • UPF performs data network routing and business flow steering on the processed business data.
  • UPF performs data network routing and business flow steering on the processed business data, which means that UPF sends the processed business data to the local data network. Specifically, UPF directs the processed business data to the application in the local data network. server.
  • Method 2 After UPF performs LAN business flow guidance on the application's business data, the application's business data is directed to the business function network element in the LAN for processing, and other functional network elements deployed in the network continue to process the processed business data. Directed to the server of the application in the local data network, this requires UPF to add the data packet for executing the data network in the data packet in the business data according to the forwarding policy when directing the application's business data to the business function network element in the local area network.
  • Routing service flow guidance information when other functional network elements (such as the switch corresponding to the service function network element) receive the service data processed by the service function network element in the LAN, based on the information used to perform data network routing service flow guidance
  • the message directs the processed business data to the application's server in the local data network.
  • the processed service data can also be directed to the server of the application in the local data network according to the destination address of the service data. That is, this method does not require Information used to perform data network routing and business flow guidance needs to be added to the data packets in the business data.
  • data network routing traffic steering is also called local data network routing business flow steering, local routing business flow steering or AF-influenced traffic steering (AF-influenced traffic steering).
  • FIG. 3 is a schematic diagram of the service data processing process provided by the embodiment of the present application.
  • UPF determines the business chain information based on the forwarding policy, adds the business chain information to the header of the business data, and then sends the data packet to the switch of the business chain corresponding to the business chain information.
  • the switch determines the business chain information based on the business data.
  • the service chain information is determined from the multiple service function network elements corresponding to the switch.
  • One or more service function network elements corresponding to the service chain information are determined, and the one or more service function network elements perform corresponding operations on the service data.
  • the switch After receiving the service function, the switch sends the processed service data to the next switch, and then the next switch continues to select one or more service function network elements to perform corresponding service functions on the received service data, so as to By analogy, until the processing of all service function network elements corresponding to the service chain information is completed, the output result is obtained.
  • the output result is also called the service data processed by the service function network elements deployed in the local area network.
  • the UPF first sends the received service data a to the switch 1.
  • the switch 1 determines the service function network element 1 based on the service chain information in the received service data a. According to the service function Network element 1 performs service function 1 on service data a and obtains service data b.
  • switch 1 sends service data b to switch 2 on the service chain.
  • Switch 2 uses the service chain information in the received service data b. , determine the service function network element 3. After the service function network element 3 executes the service function 3 on the service data b, the service data c is obtained, and the final output result is the service data c.
  • business functions are performed on business data here, for example, it can be used to improve the transmission bandwidth and transmission quality of business data.
  • the UPF or the switch on the service chain After obtaining the service data (such as the above-mentioned service data c) processed by the service function network element deployed in the LAN, the UPF or the switch on the service chain performs data network routing and service flow steering on the processed service data, that is, the service data is
  • the processed business data is directed to the local data network, allowing users to access applications in the local data network nearby.
  • Servers for the same application can be deployed in multiple locations, so that the network can select an anchor UPF that is close to the UE and supports the UE's access to the local data network based on the UE's access location, in order to reduce routing detours and network latency.
  • the access location of the UE moves.
  • the anchor UPF needs to be reselected to access the application nearby.
  • the embodiments of this application use data network routing service flow guidance to select an appropriate UPF for the UE, and then the UPF directs the service data of the UE's application to the server of the application in the local data network, thereby realizing that the UE is nearby Access applications on the local data network.
  • the above solution and the forwarding strategy determined by UPF can first implement LAN business flow guidance for business data to improve the transmission quality and transmission bandwidth of business data. Then, data network routing and business flow guidance are performed on the business data processed by the business function network elements deployed in the LAN to send the processed business data to the local data network, thereby enabling users to access applications in the local data network nearby.
  • this solution improves the transmission quality and bandwidth of business data. On the other hand, it enables users to access applications in local data packages nearby, thereby improving the transmission performance of business data and thus improving user experience.
  • Figure 4(a) is a schematic flow chart of a communication method provided by an embodiment of the present application.
  • the SMF receives a LAN business flow steering policy identifier and a data network routing control information from the PCF, and then the SMF determines the forwarding action rules based on the LAN business flow steering policy identifier and a data network routing control information.
  • the method includes the following steps:
  • Step 401a PCF sends PCC rules to SMF.
  • the PCC rule includes the applied LAN business flow steering policy identification and data network routing control information.
  • the data network routing control information includes at least one data network access identifier (data network access identifier, DNAI) and at least one data network corresponding to the DNAI. Routing traffic is directed to policy identification and/or data network routing information.
  • the data network routing service flow steering policy identifier corresponding to at least one DNAI refers to the data network routing service flow steering policy identifier corresponding to each DNAI in the at least one DNAI.
  • the DNAI is the same as the data network routing service flow steering policy identifier.
  • the at least one DNAI includes DNAI1, DNAI2 and DNAI3, then the DNAI1 corresponds to a data network routing service flow steering policy identifier, DNAI2 corresponds to a data network routing service flow steering policy identifier, and DNAI3 corresponds to a data network routing service flow steering policy identifier Policy identifier.
  • the data network routing service flow steering policy identifier corresponding to different DNAIs can be the same or different.
  • the data network routing information corresponding to at least one DNAI refers to the data network routing information corresponding to each DNAI in the at least one DNAI.
  • DNAI corresponds to the data network routing information one-to-one.
  • the at least one DNAI includes DNAI1, DNAI2 and DNAI3.
  • the DNAI1 corresponds to a data network routing information
  • DNAI2 corresponds to a data network routing information
  • DNAI3 corresponds to a data network routing information.
  • the data network routing information corresponding to different DNAIs can be the same or different.
  • the PCC rule includes the LAN business flow steering policy identifier and the data network routing control information.
  • the data network routing control information includes at least one DNAI, and the data network routing business flow steering policy identifier corresponding to the at least one DNAI.
  • the PCC rule includes a LAN business flow steering policy identifier and data network routing control information.
  • the data network routing control information includes at least one DNAI and the data network routing information corresponding to the at least one DNAI.
  • the PCC rule includes the LAN business flow steering policy identifier and the data network routing control information.
  • the data network routing control information includes at least one DNAI, the data network routing business flow steering policy identifier corresponding to the at least one DNAI, and the at least one DNAI. Data network routing information corresponding to DNAI respectively.
  • the LAN business flow steering policy identifier is used to perform LAN business flow steering on the application's business data.
  • the LAN traffic steering policy ID is also called the N6 LAN traffic steering policy ID (N6-LAN traffic steering policy ID) and the business flow steering policy ID.
  • the data network routing service flow steering policy identifier is used to perform data network routing service flow steering on the application's service data.
  • the data network routing traffic steering policy identifier is also called the AF-influenced traffic steering policy identifier (AF-influenced Traffic Steering Policy Id).
  • the data network routing information is used to perform data network routing service flow guidance on the application's service data.
  • the data network routing information includes at least one of the address, port number or protocol number of the application's server.
  • Data network routing information is also called N6 routing information (N6 routing information).
  • DNAI is used to identify the data network.
  • SMF can select UPF according to DNAI, and the UPF can send the received data to the data network corresponding to the DNAI.
  • the data network corresponding to the DNAI may also be called a local data network.
  • Step 402a The SMF determines the forwarding action rule (FAR) based on the LAN service flow steering policy identifier and the data network routing control information.
  • FAR forwarding action rule
  • step 402a is specifically: SMF determines the target DNAI from at least one DNAI in the data network routing control information, and then SMF determines the target DNAI from the data network routing service flow steering policy identifier corresponding to at least one DNAI.
  • the data network routing service flow steering policy identifier is determined by the SMF, and then the SMF determines the forwarding policy identifier based on the LAN service flow steering policy identifier and the data network routing service flow steering policy identifier corresponding to the target DNAI.
  • the SMF determines the FAR based on the forwarding policy identifier, and the FAR includes the forwarding policy identifier.
  • UPF determines the forwarding policy corresponding to the FAR according to the following method: UPF determines the forwarding policy according to the forwarding policy identifier in the FAR.
  • the forwarding policy identifier includes a first policy identifier and a second policy identifier, wherein SMF determines the first policy identifier according to the LAN service flow steering policy identifier, and determines the first policy identifier according to the data network routing service flow steering policy identifier corresponding to the target DNAI. , determine the second policy identifier.
  • the priority of the first policy identifier is higher than the priority of the second policy identifier.
  • the UPF determines the forwarding policy according to the first policy identifier and the second policy identifier.
  • the data network corresponding to the target DNAI is the local data network, which will be explained here uniformly, and will not be described again in other embodiments later.
  • step 402a is specifically: SMF determines the target DNAI from at least one DNAI in the data network routing control information, and then SMF determines the data network route corresponding to the target DNAI from the data network routing information corresponding to at least one DNAI. information, and then SMF determines the forwarding policy identifier based on the LAN service flow steering policy identifier. The SMF then determines the FAR based on the forwarding policy identifier and the data network routing information corresponding to the target DNAI. The FAR includes the forwarding policy identifier and the data network routing information corresponding to the target DNAI.
  • UPF determines the forwarding policy corresponding to the FAR according to the following method: UPF determines the forwarding policy according to the forwarding policy identifier in the FAR and the data network routing information corresponding to the target DNAI.
  • the priority of the forwarding policy identifier is higher than the priority of the data network routing information corresponding to the target DNAI.
  • step 402a is specifically: SMF determines the target DNAI from at least one DNAI in the data network routing control information, and then, SMF determines the target DNAI from the data network routing service flow steering policy identifier corresponding to at least one DNAI.
  • the corresponding data network routing service flow steering policy identifier, and the data network routing information corresponding to the target DNAI is determined from the data network routing information corresponding to at least one DNAI.
  • the SMF determines the forwarding policy identifier based on the LAN service flow steering policy identifier and the data network routing service flow steering policy identifier corresponding to the target DNAI.
  • the SMF determines the FAR based on the forwarding policy identifier and the data network routing information corresponding to the target DNAI.
  • the FAR includes the forwarding policy identifier and the data network routing information corresponding to the target DNAI.
  • UPF determines the forwarding strategy corresponding to the FAR according to the following method: UPF determines the forwarding strategy according to the forwarding strategy identifier in the FAR, or, UPF determines the forwarding strategy according to the forwarding strategy identifier and target in the FAR
  • the data network routing information corresponding to DNAI determines the forwarding strategy.
  • the forwarding policy identifier includes a first policy identifier and a second policy identifier, wherein SMF determines the first policy identifier according to the LAN service flow steering policy identifier, and determines the first policy identifier according to the data network routing service flow steering policy identifier corresponding to the target DNAI. , determine the second strategy identifier.
  • the priority of the first policy identifier is higher than the priority of the second policy identifier, and the priority of the first policy identifier is higher than the priority of the data network routing information corresponding to the target DNAI.
  • the UPF determines the forwarding strategy based on the first policy identifier and the second policy identifier, or the UPF determines the forwarding strategy based on the first policy identifier, the second policy identifier, and the data network routing information corresponding to the target DNAI.
  • the SMF determines the target DNAI from at least one DNAI in the data network routing control information. For example, the SMF determines the target DNAI from the at least one DNAI according to the location of the UE and the network topology, and the data network corresponding to the target DNAI, It is the optimal data network among multiple data networks that the UE can access.
  • the target DNAI is used to indicate the local data network, so it is also called the DNAI corresponding to the local data network. A unified description is given here and will not be repeated later.
  • Step 403a SMF sends forwarding action rules to UPF.
  • SMF can also send the PDR associated with the forwarding action rule to UPF.
  • the PDR includes the source interface of the incoming packet (Source Interface of incoming packet), and also includes the service data flow filter or application identification. Among them, the value of the source interface of the incoming data packet is Access (indicating uplink), and the service Data flow filters can be 5-tuple messages.
  • the service data flow filter or application identifier is determined based on the service flow template in the PCC rule.
  • the SMF determines that the UPF supports LAN service flow steering and data network routing service flow steering. If the current UPF does not support LAN service flow steering and data network routing service flow steering, SMF will select a supported UPF and offload the service data to the UPF, or reselect a UPF and send the forwarding action rules to the new selection. UPF.
  • the forwarding action rules sent by the session management network element to the user plane network element can be used to instruct the user plane network element to first perform LAN service flow steering on the service data, and then perform data network routing service flow steering on the processed service data.
  • this solution improves the transmission quality and bandwidth of business data.
  • it enables users to access applications in local data packages nearby, thereby improving the transmission performance of business data and improving user experience.
  • Figure 4(b) is a schematic flowchart of a communication method provided by an embodiment of the present application.
  • the SMF receives at least two LAN business flow steering policy identifiers and one data network routing control information from the PCF, and then the SMF determines forwarding based on the at least two LAN business flow steering policy identifiers and one data network routing control information. Action rules.
  • the method includes the following steps:
  • Step 401b PCF sends PCC rules to SMF.
  • the PCC rule includes data network routing control information and at least two LAN service flow steering policy identifiers corresponding to at least two DNAIs.
  • the data network routing control information includes at least two DNAIs and data network routing service flow steering policy identifiers and/or data network routing information respectively corresponding to the at least two DNAIs.
  • the LAN business flow steering policy identifiers corresponding to at least two DNAIs refer to the LAN business flow steering policy identifiers corresponding to each DNAI of the at least two DNAIs.
  • the DNAIs correspond to the LAN business flow steering policy identifiers one-to-one, such as
  • the at least two DNAIs include DNAI1, DNAI2 and DNAI3, then DNAI1 corresponds to a LAN business flow steering policy identifier, DNAI2 corresponds to a LAN business flow steering policy identifier, DNAI3 corresponds to a LAN business flow steering policy identifier, and different DNAIs correspond to LAN services
  • the traffic steering policy identifiers can be the same or different.
  • the data network routing service flow steering policy identifier corresponding to at least two DNAIs refers to the data network routing service flow steering policy identifier corresponding to each DNAI of the at least two DNAIs.
  • the DNAI is the same as the data network routing service flow steering policy identifier.
  • the at least two DNAIs include DNAI1, DNAI2 and DNAI3, then the DNAI1 corresponds to a data network routing service flow steering policy identifier, DNAI2 corresponds to a data network routing service flow steering policy identifier, and DNAI3 corresponds to a data network routing service flow steering strategy identifier Steering policy identifier.
  • the data network routing service flow steering policy identifier corresponding to different DNAIs can be the same or different.
  • the data network routing information corresponding to at least two DNAIs refers to the data network routing information corresponding to each of the at least two DNAIs.
  • the DNAIs correspond to the data network routing information one-to-one.
  • the at least two DNAIs include DNAI1, DNAI2 and DNAI3, then DNAI1 corresponds to one data network routing information, DNAI2 corresponds to one data network routing information, and DNAI3 corresponds to one data network routing information.
  • the data network routing information corresponding to different DNAIs can be the same or different.
  • PCC rules include data network routing control information and at least two DNAIs corresponding to the LAN business flow steering policy identifiers.
  • the data network routing control information includes at least two DNAIs, and the data network routes corresponding to the at least two DNAIs.
  • Business flow steering policy identifier
  • PCC rules include data network routing control information and at least two DNAIs corresponding to the LAN business flow steering policy identifiers.
  • the data network routing control information includes at least two DNAIs, and the data network routes corresponding to the at least two DNAIs. information.
  • PCC rules include data network routing control information and at least two DNAIs corresponding to LAN service flow steering policy identifiers.
  • the data network routing control information includes at least two DNAIs.
  • the at least two DNAIs correspond to data network routing services.
  • Step 402b SMF determines the forwarding action rule (FAR) based on the data network routing control information and the LAN service flow steering policy identifier corresponding to at least two DNAIs.
  • FAR forwarding action rule
  • step 402b is specifically: SMF determines the target DNAI from at least two DNAIs in the data network routing control information, and then SMF determines the target from the data network routing service flow steering policy identifier corresponding to at least two DNAIs.
  • the data network routing service flow steering policy identifier corresponding to the DNAI, and the LAN service flow steering policy identifier corresponding to the target DNAI is determined from at least two LAN service flow steering policy identifiers corresponding to the DNAI, and then the SMF determines the LAN service flow steering policy identifier corresponding to the target DNAI according to the LAN service flow corresponding to the target DNAI.
  • the steering policy identifier and the data network routing service flow steering strategy identifier corresponding to the target DNAI determine the forwarding policy identifier.
  • the SMF determines the FAR based on the forwarding policy identifier, and the FAR includes the forwarding policy identifier.
  • UPF determines the forwarding policy corresponding to the FAR according to the following method: UPF determines the forwarding policy according to the forwarding policy identifier in the FAR.
  • the forwarding policy identifier includes a first policy identifier and a second policy identifier, wherein the SMF determines the first policy identifier according to the LAN service flow steering policy identifier corresponding to the target DNAI, and routes the service according to the data network routing service corresponding to the target DNAI.
  • the flow steering policy identifier determines the second policy identifier.
  • the priority of the first policy identifier is higher than the priority of the second policy identifier. Therefore, the UPF determines the forwarding policy according to the first policy identifier and the second policy identifier.
  • step 402b is specifically: SMF determines the target DNAI from at least two DNAIs in the data network routing control information, and then SMF determines the data corresponding to the target DNAI from the data network routing information corresponding to the at least two DNAIs.
  • the network routing information and the LAN service flow steering policy identifier corresponding to at least two DNAIs are used to determine the LAN service flow steering policy identifier corresponding to the target DNAI, and then the SMF determines the forwarding policy identifier based on the LAN service flow steering policy identifier corresponding to the target DNAI.
  • the SMF determines the FAR based on the forwarding policy identifier and the data network routing information corresponding to the target DNAI.
  • the FAR includes the forwarding policy identifier and the data network routing information corresponding to the target DNAI.
  • UPF determines the forwarding policy corresponding to the FAR according to the following method: UPF determines the forwarding policy according to the forwarding policy identifier in the FAR and the data network routing information corresponding to the target DNAI.
  • the priority of the forwarding policy identifier is higher than the priority of the data network routing information corresponding to the target DNAI.
  • step 402b is specifically: SMF determines the target DNAI from at least two DNAIs in the data network routing control information, and then, SMF determines the target DNAI from the data network routing service flow steering policy identifier corresponding to at least two DNAIs.
  • the data network routing service flow steering policy identifier corresponding to the target DNAI is determined from the LAN service flow steering policy identifiers corresponding to at least two DNAIs, and the LAN service flow steering policy identifier corresponding to the target DNAI is determined from the data network routing policy identifiers corresponding to at least two DNAIs.
  • the routing information determine the data network routing information corresponding to the target DNAI.
  • the SMF determines the forwarding policy identifier based on the LAN service flow steering policy identifier corresponding to the target DNAI and the data network routing service flow steering policy identifier corresponding to the target DNAI.
  • the SMF determines the FAR based on the forwarding policy identifier and the data network routing information corresponding to the target DNAI.
  • the FAR includes the forwarding policy identifier and the data network routing information corresponding to the target DNAI.
  • UPF determines the forwarding strategy corresponding to the FAR according to the following method: UPF determines the forwarding strategy according to the forwarding strategy identifier in the FAR, or, UPF determines the forwarding strategy according to the forwarding strategy identifier and target in the FAR
  • the data network routing information corresponding to DNAI determines the forwarding strategy.
  • the forwarding policy identifier includes a first policy identifier and a second policy identifier, wherein the SMF determines the first policy identifier according to the LAN service flow steering policy identifier corresponding to the target DNAI, and routes the service according to the data network routing service corresponding to the target DNAI.
  • the flow steering policy identifier determines the second policy identifier.
  • the priority of the first policy identifier is higher than the priority of the second policy identifier. Therefore, the UPF determines the forwarding strategy based on the first policy identifier and the second policy identifier, or the UPF determines the forwarding strategy based on the first policy identifier, the second policy identifier, and the data network routing information corresponding to the target DNAI.
  • Step 403b SMF sends the forwarding action rule to UPF.
  • SMF can also send the PDR associated with the forwarding action rule to UPF.
  • the PDR includes the source interface of the incoming packet (Source Interface of incoming packet), and also includes the service data flow filter or application identification. Among them, the value of the source interface of the incoming data packet is Access (indicating uplink), and the service Data flow filters can be 5-tuple messages.
  • the service data flow filter or application identifier is determined based on the service flow template in the PCC rule.
  • the SMF determines that the UPF supports LAN service flow steering and data network routing service flow steering. If the current UPF does not support LAN service flow steering and data network routing service flow steering, SMF will select a supported UPF and offload the service data to the UPF, or reselect a UPF and send the forwarding action rules to the new selection. UPF.
  • the forwarding action rules sent by SMF to UPF can be used to instruct UPF to first perform LAN service flow guidance on the service data, and then perform data network routing service flow guidance on the processed service data, so as to enable users to access the local data network nearby.
  • this solution improves the transmission quality and bandwidth of business data.
  • this solution enables users to access applications in local data packages nearby, thereby improving the transmission performance of business data and improving user experience.
  • this solution can provide multiple LAN business flow steering policy identifiers, and select the LAN business flow steering policy identifier to be used from multiple LAN business flow steering policy identifiers, which helps to improve the accuracy of the forwarding strategy and thereby improve the delivery of business data. Speed and accuracy further enhance user experience.
  • Figure 5(a) is a schematic flowchart of a communication method provided by an embodiment of the present application.
  • PCF receives a service chain identifier and at least one DNAI corresponding configuration identifier and/or data network routing information, and then PCF responds according to the service chain identifier, or according to the corresponding service chain identifier and at least one DNAI.
  • Configuration identifier determine the business flow steering policy identifier corresponding to at least one DNAI, and send the business flow steering policy identifier corresponding to at least one DNAI to SMF through PCC rules, or use the PCC rule to send the business flow steering policy identifier corresponding to at least one DNAI and data network routing information are sent to the SMF, and the SMF determines the forwarding action rules based on the business flow steering policy identifier corresponding to the at least one DNAI, or determines the forwarding action rules based on the business flow steering policy identifier corresponding to the at least one DNAI and the data network routing information.
  • the method includes the following steps:
  • Step 501a The PCF receives the service function chain ID, at least one DNAI, and the configuration identification and/or data network routing information corresponding to the at least one DNAI.
  • the PCF receives the service chain identifier, at least one DNAI, and the configuration identifier corresponding to the at least one DNAI from the AF. Servers to which this AF can be applied.
  • the configuration identifier corresponding to at least one DNAI refers to the configuration identifier corresponding to each DNAI in the at least one DNAI.
  • the DNAI corresponds to the configuration identifier one-to-one.
  • the at least one DNAI includes DNAI1, DNAI2 and DNAI3, then the DNAI1 corresponds to a Configuration identifier, DNAI2 corresponds to a configuration identifier, and DNAI3 corresponds to a configuration identifier.
  • the configuration identifiers corresponding to different DNAIs can be the same or different.
  • the data network routing information corresponding to at least one DNAI refers to the data network routing information corresponding to each DNAI in the at least one DNAI.
  • DNAI corresponds to the data network routing information one-to-one.
  • the at least one DNAI includes DNAI1, DNAI2 and DNAI3.
  • the DNAI1 corresponds to a data network routing information
  • DNAI2 corresponds to a data network routing information
  • DNAI3 corresponds to a data network routing information.
  • the data network routing information corresponding to different DNAIs can be the same or different.
  • the business chain identifier indicates a business chain, which is used to perform business chain processing on the application's business data.
  • This configuration ID is used to perform data network routing and business flow guidance for the application's business data.
  • This configuration ID is also called the N6 Configuration ID (N6 Profile ID).
  • the data network routing information is used to perform data network routing business flow guidance on the application's business data.
  • the data network routing information includes at least one of the address, port number or protocol number of the application server.
  • Data network routing information is also called N6 routing information (N6 routing information).
  • the PCF receives the service chain identifier, at least one DNAI, and the configuration identifier corresponding to the at least one DNAI.
  • the PCF receives the service chain identifier, at least one DNAI, and data network routing information corresponding to at least one DNAI.
  • the PCF receives the service chain identifier, at least one DNAI, the configuration identifier corresponding to the at least one DNAI, and the data network routing information corresponding to the at least one DNAI.
  • Step 502a PCF determines PCC rules.
  • PCF determines the service flow steering policy identifier corresponding to at least one DNAI according to the service chain identifier and the configuration identifier corresponding to at least one DNAI. Then the PCC rule is determined according to the business flow steering policy identifier respectively corresponding to at least one DNAI, and the PCC rule includes at least one DNAI and the business flow steering policy identifier corresponding to at least one DNAI respectively.
  • the configuration identifier corresponding to at least one DNAI corresponds to the service flow steering policy identifier corresponding to at least one DNAI in a one-to-one correspondence.
  • DNAI1 corresponds to configuration identifier 1
  • DNAI2 corresponds to configuration identifier 2
  • DNAI3 corresponds to configuration identifier 3.
  • PCF determines the service flow steering policy identifier 1 based on the service chain identifier and configuration identifier 1, and determines the service flow steering strategy based on the service chain identifier and configuration identifier 2.
  • Identifier 2 determine the service flow steering policy identifier 3 based on the service chain identifier and configuration identifier 3.
  • the business flow steering policy identifier is used to perform LAN business flow steering on the application's business data and perform data network routing business flow steering on the application's business data.
  • PCF determines the service flow steering policy identifier according to the service chain identifier. Then, the PCC rule is determined based on the business flow steering policy identifier and the data network routing information corresponding to at least one DNAI.
  • the PCC rule includes the business flow steering policy identifier, at least one DNAI, and the data network routing information corresponding to at least one DNAI.
  • the business flow steering policy identifier is used to perform LAN business flow steering on the application's business data.
  • the data network routing information is used to perform data network routing service flow guidance on the application's service data.
  • the data network routing information includes at least one of the address, port number or protocol number of the application's server.
  • the PCF determines the service flow steering policy identifier corresponding to at least one DNAI according to the service chain identifier and the configuration identifier corresponding to at least one DNAI.
  • the PCC rule is then determined based on the business flow steering policy identifier corresponding to at least one DNAI and the data network routing information corresponding to at least one DNAI.
  • the PCC rule includes at least one DNAI, and the business flow steering policy identifier corresponding to at least one DNAI and at least one DNAI. Data network routing information corresponding to each DNAI.
  • the configuration identifier corresponding to at least one DNAI corresponds to the service flow steering policy identifier corresponding to at least one DNAI in a one-to-one correspondence.
  • DNAI1 corresponds to configuration identifier 1
  • DNAI2 corresponds to configuration identifier 2
  • DNAI3 corresponds to configuration identifier 3.
  • PCF determines the service flow steering policy identifier 1 based on the service chain identifier and configuration identifier 1, and determines the service flow steering strategy based on the service chain identifier and configuration identifier 2.
  • Identifier 2 determine the service flow steering policy identifier 3 based on the service chain identifier and configuration identifier 3.
  • the business flow steering policy identifier is used to perform LAN business flow steering on the application's business data and perform data network routing business flow steering on the application's business data.
  • the data network routing information is used to perform data network routing service flow guidance on the application's service data.
  • the data network routing information includes at least one of the address, port number or protocol number of the application's server.
  • Step 503a PCF sends PCC rules to SMF.
  • Step 504a The SMF determines the forwarding action rule (FAR) based on the PCC rules.
  • step 504a is specifically: SMF determines the target DNAI from at least one DNAI, and then SMF determines the business flow steering policy identifier corresponding to the target DNAI from the business flow steering policy identifier corresponding to at least one DNAI, and then SMF The forwarding policy identifier is determined based on the service flow steering policy identifier corresponding to the target DNAI. The SMF then determines the FAR based on the forwarding policy identifier, and the FAR includes the forwarding policy identifier. Combined with this situation, after UPF receives the FAR, UPF determines the forwarding policy corresponding to the FAR according to the following method: UPF determines the forwarding policy according to the forwarding policy identifier in the FAR.
  • step 504a is specifically: SMF determines the target DNAI from at least one DNAI, and then SMF determines the data network routing information corresponding to the target DNAI from the data network routing information corresponding to at least one DNAI, and then SMF determines the data network routing information corresponding to the target DNAI according to the service
  • the flow steering policy identifier determines the forwarding policy identifier.
  • the SMF determines the FAR based on the forwarding policy identifier and the data network routing information corresponding to the target DNAI.
  • the FAR includes the forwarding policy identifier and the data network routing information corresponding to the target DNAI.
  • UPF determines the forwarding policy corresponding to the FAR according to the following method: UPF determines the forwarding policy according to the forwarding policy identifier in the FAR and the data network routing information corresponding to the target DNAI.
  • step 504a is specifically: SMF determines the target DNAI from at least one DNAI, and then SMF determines the business flow steering policy identifier corresponding to the target DNAI from the business flow steering policy identifier corresponding to at least one DNAI, and from Among the data network routing information corresponding to at least one DNAI, the data network routing information corresponding to the target DNAI is determined, and then the SMF determines the forwarding policy identifier according to the business flow steering policy identifier corresponding to the target DNAI. Then SMF determines the FAR based on the forwarding policy identifier and the data network routing information corresponding to the target DNAI, and the FAR includes the forwarding policy identifier.
  • UPF determines the forwarding strategy corresponding to the FAR according to the following method: UPF determines the forwarding strategy according to the forwarding strategy identifier in the FAR, or, UPF determines the forwarding strategy according to the forwarding strategy identifier and target in the FAR
  • the data network routing information corresponding to DNAI determines the forwarding strategy.
  • Step 505a SMF sends forwarding action rules to UPF.
  • SMF can also send the PDR associated with the forwarding action rule to UPF.
  • the PDR includes the source interface of the incoming packet (Source Interface of incoming packet), and also includes the service data flow filter or application identification. Among them, the value of the source interface of the incoming data packet is Access (indicating uplink), and the service Data flow filters can be 5-tuple messages.
  • the service data flow filter or application identifier is determined based on the service flow template in the PCC rule.
  • the SMF determines that the UPF supports LAN service flow steering and data network routing service flow steering. If the current UPF does not support LAN service flow steering and data network routing service flow steering, SMF will select a supported UPF and offload the service data to the UPF, or reselect a UPF and send the forwarding action rules to the new selection. UPF.
  • PCF sends PCC rules to SMF, and SMF can instruct UPF to first perform LAN service flow steering on the service data according to the PCC rules, and then perform data network routing service flow steering on the processed service data to enable users to access the local area nearby.
  • Applications in Data Networks improves the transmission quality and bandwidth of business data.
  • this solution enables users to access applications in local data packages nearby, thereby improving the transmission performance of business data and improving user experience.
  • Figure 5(b) is a schematic flowchart of a communication method provided by an embodiment of the present application.
  • the PCF receives the service chain identifiers corresponding to at least two DNAIs, and the configuration identifiers and/or data network routing information corresponding to the at least two DNAIs, and then the PCF receives the service chain identifiers corresponding to the at least two DNAIs. , or based on the service chain identifiers corresponding to the at least two DNAIs and the configuration identifiers corresponding to the at least two DNAIs, determine the business flow steering policy identifiers corresponding to the at least two DNAIs, and use PCC rules to determine the business flow direction policy identifiers corresponding to the at least two DNAIs.
  • the steering policy identifier is sent to the SMF, or the business flow steering policy identifier and data network routing information corresponding to at least two DNAIs are sent to the SMF through PCC rules, and the SMF determines the forwarding action based on the business flow steering policy identifiers corresponding to the at least two DNAIs. rules, or determine forwarding action rules based on the service flow steering policy identifiers and data network routing information corresponding to at least two DNAIs.
  • the method includes the following steps:
  • Step 501b PCF receives at least two DNAIs, service function chain IDs corresponding to at least two DNAIs, and receives configuration IDs corresponding to at least two DNAIs and/or data networks corresponding to at least two DNAIs. routing information.
  • the PCF receives from the AF at least two DNAIs, service chain identifiers corresponding to at least two DNAIs, configuration identifiers corresponding to at least two DNAIs, and data network routing information corresponding to at least two DNAIs. Servers to which this AF can be applied.
  • the business chain identifiers corresponding to at least two DNAIs refer to the business chain identifiers corresponding to each DNAI of the at least two DNAIs.
  • the DNAIs correspond to the business chain identifiers one-to-one.
  • the at least two DNAIs include DNAI1 and DNAI2. and DNAI3, then DNAI1 corresponds to a business chain identifier, DNAI2 corresponds to a business chain identifier, and DNAI3 corresponds to a business chain identifier.
  • the business chain identifiers corresponding to different DNAIs can be the same or different.
  • the configuration identifiers corresponding to at least two DNAIs refer to the configuration identifiers corresponding to each of the at least two DNAIs.
  • the DNAIs correspond to the configuration identifiers one-to-one.
  • the at least two DNAIs include DNAI1, DNAI2 and DNAI3, then the DNAI1 corresponds to a configuration identifier, DNAI2 corresponds to a configuration identifier, and DNAI3 corresponds to a configuration identifier.
  • the configuration identifiers corresponding to different DNAIs can be the same or different.
  • the data network routing information corresponding to at least two DNAIs refers to the data network routing information corresponding to each of the at least two DNAIs.
  • the DNAIs correspond to the data network routing information one-to-one.
  • the at least two DNAIs include DNAI1, DNAI2 and DNAI3, then DNAI1 corresponds to one data network routing information, DNAI2 corresponds to one data network routing information, and DNAI3 corresponds to one data network routing information.
  • the data network routing information corresponding to different DNAIs can be the same or different.
  • the business chain identifier indicates a business chain, and the business chain is used to instruct the execution of business chain processing on the application's business data.
  • This configuration ID is used to perform data network routing and business flow guidance for the application's business data.
  • This configuration ID is also called the N6 Configuration ID (N6 Profile ID).
  • the data network routing information is used to perform data network routing service flow guidance on the application's service data.
  • the data network routing information includes at least one of the address, port number or protocol number of the application's server.
  • Data network routing information is also called N6 routing information (N6 routing information).
  • the PCF receives the service chain identifier, at least two DNAIs, and the configuration identifiers corresponding to the at least two DNAIs.
  • the PCF receives the service chain identifier, at least two DNAIs, and the data network routing information corresponding to the at least two DNAIs.
  • the PCF receives the service chain identifier, at least two DNAIs, the configuration identifiers corresponding to the at least two DNAIs, and the data network routing information corresponding to the at least two DNAIs.
  • Step 502b PCF determines PCC rules.
  • the PCF determines the service flow steering policy identifier corresponding to at least two DNAIs based on the service chain identifiers corresponding to the at least two DNAIs and the configuration identifiers corresponding to the at least two DNAIs. Then the PCC rule is determined based on the business flow steering policy identifiers respectively corresponding to the at least two DNAIs.
  • the PCC rule includes at least two DNAIs and the business flow steering policy identifiers respectively corresponding to the at least two DNAIs.
  • the configuration identifiers corresponding to the at least two DNAIs are in one-to-one correspondence with the service flow steering policy identifiers corresponding to the at least two DNAIs, and the service chain identifiers corresponding to the at least two DNAIs are respectively related to the service flows corresponding to the at least two DNAIs.
  • the guidance strategy identifiers There is a one-to-one correspondence between the guidance strategy identifiers.
  • DNAI1 corresponds to configuration identifier 1 and service chain identifier 1
  • DNAI2 corresponds to configuration identifier 2 and service chain identifier 2
  • DNAI3 corresponds to configuration identifier 3 and service chain identifier 3.
  • PCF determines the service flow steering policy based on service chain identifier 1 and configuration identifier 1.
  • Identification 1 determine the business flow direction policy identification 2 based on the service chain identification 2 and the configuration identification 2
  • determine the business flow steering strategy identification 3 based on the service chain identification 3 and the configuration identification 3.
  • the business flow steering policy identifier is used to perform LAN business flow steering on the application's business data and perform data network routing business flow steering on the application's business data.
  • the PCF determines the service flow steering policy identifier corresponding to at least two DNAIs based on the service chain identifiers corresponding to the at least two DNAIs respectively. Then, PCC rules are determined based on the business flow steering policy identifiers corresponding to at least two DNAIs and the data network routing information corresponding to at least two DNAIs respectively.
  • the PCC rules include at least two DNAIs and the business flow steering policies corresponding to at least two DNAIs. Identification and data network routing information corresponding to at least two DNAIs respectively.
  • the business flow steering policy identifier is used to perform LAN business flow steering on the application's business data.
  • the data network routing information is used to perform data network routing service flow guidance on the application's service data.
  • the data network routing information includes at least one of the address, port number or protocol number of the application's server.
  • the PCF determines the service flow steering policy identifier corresponding to at least two DNAIs based on the service chain identifiers corresponding to the at least two DNAIs and the configuration identifiers corresponding to the at least two DNAIs. Then, PCC rules are determined based on the business flow steering policy identifiers corresponding to at least two DNAIs and the data network routing information corresponding to at least two DNAIs respectively.
  • the PCC rules include at least two DNAIs and the business flow steering policies corresponding to at least two DNAIs. Identification and data network routing information corresponding to at least two DNAIs respectively.
  • the configuration identifiers corresponding to the at least two DNAIs are in one-to-one correspondence with the service flow steering policy identifiers corresponding to the at least two DNAIs, and the service chain identifiers corresponding to the at least two DNAIs are respectively related to the service flows corresponding to the at least two DNAIs.
  • the guidance strategy identifiers There is a one-to-one correspondence between the guidance strategy identifiers.
  • DNAI1 corresponds to configuration identifier 1 and service chain identifier 1
  • DNAI2 corresponds to configuration identifier 2 and service chain identifier 2
  • DNAI3 corresponds to configuration identifier 3 and service chain identifier 3.
  • PCF determines the service flow steering policy based on service chain identifier 1 and configuration identifier 1.
  • Identification 1 determine the business flow direction policy identification 2 based on the service chain identification 2 and the configuration identification 2
  • determine the business flow steering strategy identification 3 based on the service chain identification 3 and the configuration identification 3.
  • the business flow steering policy identifier is used to perform LAN business flow steering on the application's business data and perform data network routing business flow steering on the application's business data.
  • the data network routing information is used to perform data network routing service flow guidance on the application's service data.
  • the data network routing information includes at least one of the address, port number or protocol number of the application's server.
  • Step 503b PCF sends PCC rules to SMF.
  • Step 504b The SMF determines the forwarding action rule (FAR) based on the PCC rules.
  • step 504b is specifically: SMF determines the target DNAI from at least two DNAIs, and then SMF determines the business flow steering policy identifier corresponding to the target DNAI from the business flow steering policy identifiers corresponding to the at least two DNAIs, Then SMF determines the forwarding policy identifier based on the service flow steering policy identifier corresponding to the target DNAI. The SMF then determines the FAR based on the forwarding policy identifier, and the FAR includes the forwarding policy identifier. Combined with this situation, after UPF receives the FAR, UPF determines the forwarding policy corresponding to the FAR according to the following method: UPF determines the forwarding policy according to the forwarding policy identifier in the FAR.
  • step 504b is specifically: SMF determines the target DNAI from at least two DNAIs, and then SMF determines the data network routing information corresponding to the target DNAI from the data network routing information corresponding to the at least two DNAIs, and then SMF Determine the forwarding policy ID based on the business flow steering policy ID. The SMF then determines the FAR based on the forwarding policy identifier and the data network routing information corresponding to the target DNAI. The FAR includes the forwarding policy identifier and the data network routing information corresponding to the target DNAI.
  • UPF determines the forwarding policy corresponding to the FAR according to the following method: UPF determines the forwarding policy according to the forwarding policy identifier in the FAR and the data network routing information corresponding to the target DNAI.
  • step 504b is specifically: SMF determines the target DNAI from at least two DNAIs, and then SMF determines the business flow steering policy identifier corresponding to the target DNAI from the business flow steering policy identifiers corresponding to the at least two DNAIs, and determine the data network routing information corresponding to the target DNAI from the data network routing information corresponding to at least two DNAIs respectively, and then the SMF determines the forwarding policy identifier according to the business flow steering policy identifier corresponding to the target DNAI. Then SMF determines the FAR based on the forwarding policy identifier and the data network routing information corresponding to the target DNAI, and the FAR includes the forwarding policy identifier.
  • UPF determines the forwarding strategy corresponding to the FAR according to the following method: UPF determines the forwarding strategy according to the forwarding strategy identifier in the FAR, or, UPF determines the forwarding strategy according to the forwarding strategy identifier and target in the FAR
  • the data network routing information corresponding to DNAI determines the forwarding strategy.
  • Step 505b SMF sends the forwarding action rule to UPF.
  • SMF can also send the PDR associated with the forwarding action rule to UPF.
  • the PDR includes the source interface of the incoming packet (Source Interface of incoming packet), and also includes the service data flow filter or application identification. Among them, the value of the source interface of the incoming data packet is Access (indicating uplink), and the service Data flow filters can be 5-tuple messages.
  • the service data flow filter or application identifier is determined based on the service flow template in the PCC rule.
  • the SMF determines that the UPF supports LAN service flow steering and data network routing service flow steering. If the current UPF does not support LAN service flow steering and data network routing service flow steering, SMF will select a supported UPF and offload the service data to the UPF, or reselect a UPF and send the forwarding action rules to the new selection. UPF.
  • PCF sends PCC rules to SMF, and SMF can instruct UPF to first perform LAN service flow steering on the service data according to the PCC rules, and then perform data network routing service flow steering on the processed service data to enable users to access the local area nearby.
  • Applications in Data Networks improves the transmission quality and bandwidth of business data.
  • this solution enables users to access applications in local data packages nearby, thereby improving the transmission performance of business data and improving user experience.
  • this solution can provide multiple business flow steering policy identifiers, and select the business flow steering policy identifier to be used from multiple business flow steering policy identifiers, which helps to improve the accuracy of the forwarding strategy, thereby improving the speed and accuracy of business data sending. properties to further enhance user experience.
  • SMF may also be unsure of the forwarding policy, so the forwarding action rule does not carry
  • the forwarding policy instead carries the information used to generate the forwarding policy, and the UPF determines the forwarding policy based on the information used to generate the forwarding policy.
  • the way in which the UPF determines the forwarding policy can refer to the way in which the SMF determines the forwarding policy in the above embodiments of Figure 4(a), Figure 4(b), Figure 5(a) or Figure 5(b), which will not be described again.
  • FIG. 2 The embodiments of FIG. 2, FIG. 4(a), FIG. 4(b), FIG. 5(a), and FIG. 5(b) will be described in detail below with reference to the specific examples shown in FIGS. 6 to 11.
  • N6 Profile ID in the following embodiments has the same meaning as the configuration ID in the previous embodiments
  • N6 routing information (N6 routing Info) in the following embodiments has the same meaning as the data in the previous embodiments.
  • the network routing information has the same meaning.
  • the business flow steering policy identifier in the following embodiments has the same meaning as the LAN business flow steering policy identifier and the service flow steering policy identifier in the previous embodiment.
  • the policy identifier has the same meaning as the data network routing service flow steering policy identifier in the previous embodiment
  • the local policy in the following embodiment has the same meaning as the forwarding policy in the previous embodiment.
  • Figure 6 is a schematic flowchart of a communication method provided by an embodiment of the present application.
  • the AF when requesting network resources for a service accessed by the UE, the AF requests the core network to perform service chain processing and service flow steering control on the service.
  • the method includes the following steps:
  • Step 601 The process for the UE to establish a PDU session.
  • the UE requests to establish a PDU session, the network selects the protocol data unit anchor (PDU session anchor, PSA) UPF for the PDU, and the network allocates an address to the UE.
  • the UE accesses the AF (ie, application server) in the DN through the established PDU session.
  • Step 602 AF sends a policy authorization establishment request message to PCF.
  • the policy authorization establishment request message includes service flow description information, service function chain ID (SFC Id) and routing requirement information (routing requirement).
  • the AF when the AF decides to request network resources and business value-added services for the application that the UE is accessing, and at the same time, the AF decides to perform traffic steering control (traffic steering control) of the accessed application data to a specific DN, the AF sends the policy authorization to the PCF. Create a request message.
  • traffic steering control traffic steering control
  • the policy authorization establishment request message may be an Npcf_PolicyAuthorization_Create request message.
  • the business flow description information is used to describe the business flow, and may be five-tuple information, for example.
  • the service chain identifier indicates a service chain, and the service chain is used to instruct the execution of service chain processing on the service data of the application, that is, the service chain identifier indicates the execution of LAN service flow guidance on the service data.
  • the service chain identifier can be obtained through negotiation between the application and the operator.
  • the AF can provide the uplink service chain identifier (uplinkSFC Id) and the downlink service chain identifier (downlink SFC Id) respectively.
  • the routing requirement information indicates the service flow steering control method for service data.
  • the routing requirement information includes at least one Data Network Access Identified (DNAI) and the N6 configuration identifier (N6 Profile ID) and/or N6 routing information (N6 routing information) corresponding to each DNAI.
  • DNAI indicates the user plane access identifier of the DN where the AF is deployed
  • N6 configuration identifier indicates the policy negotiated between the AF and the core network
  • the N6 routing information includes at least one of the address, port number and protocol number of the AF deployed on the DN.
  • the routing requirement information may also be called N6 routing requirement information.
  • the policy authorization establishment request message also includes the requested QoS requirements.
  • the policy authorization establishment request message may include multiple service chain identifiers and the DNAI corresponding to each service chain identifier, indicating that when accessing DNs at different locations, different service chains are requested to be executed.
  • Step 603 PCF saves the received information and returns a policy authorization establishment response message to AF.
  • the policy authorization establishment response message includes indication information indicating acceptance of the request.
  • Step 604 PCF determines Policy and Charging Control (PCC) rules.
  • the PCC rule includes a service flow template (SDF Template), a service flow steering policy identifier (Traffic Steering Policy Id, TSP Id) and routing description information.
  • SDF Template service flow template
  • TSP Id Service flow steering policy identifier
  • the service flow template is determined by PCF based on the service flow description information.
  • the service flow steering policy identifier is determined by the PCF based on the service chain identifier.
  • the service flow steering policy identifier is used to perform LAN service flow guidance on service data.
  • the PCF determines the upstream service flow steering policy identifier based on the uplink service chain identifier, and determines the downlink service flow steering strategy identifier based on the downlink service chain identifier, that is, the PCC rule includes Upstream service flow steering policy identifier and downstream service flow steering policy identifier.
  • the traffic steering policy identifier is also called the N6-LAN Traffic Steering Policy Id (N6-LAN Traffic Steering Policy Id).
  • the routing description information includes at least one DNAI and the AF-influenced Traffic Steering Policy Id and/or N6 routing information (N6 routing Info) corresponding to each DNAI.
  • N6 routing Info N6 routing information
  • the service flow steering policy identifier affected by AF is determined by PCF based on the N6 configuration identifier.
  • the N6 routing information is the N6 routing information described in step 601 above.
  • Step 605 PCF sends PCC rules to SMF.
  • PCF sends an Npcf_SMPolicyControl_UpdateNotify Request message to SMF, which includes PCC rules.
  • Step 606 SMF sends a response message to PCF after installing the PCC rule.
  • the response message is the Npcf_SMPolicyControl_UpdateNotify Response message.
  • Step 607 SMF determines the N4 rule based on the PCC rule.
  • the SMF determines the UPF based on at least one DNAI in the UE's location information, network topology, and routing description information.
  • the UPF may be the UPF closest to the UE among the UPFs corresponding to the at least one DNAI.
  • SMF After SMF selects a UPF, it determines N4 rules for the UPF based on PCC rules.
  • the N4 rules include uplink packet detection rules (Packet Detection Rule, PDR) and uplink forwarding action rules (Forwarding Action Rule, FAR), as well as downlink PDR and downlink FAR.
  • PDR Packet Detection Rule
  • FAR Forwarding Action Rule
  • the upstream PDR is used to match the upstream business flow.
  • the upstream PDR includes the source interface of the incoming packet (Source Interface of incoming packet), and also includes the business data flow filter or application identifier.
  • the source of the incoming data packet The value of the interface is Access (indicating uplink), and the service data flow filter can be five-tuple information.
  • the service data flow filter or application identifier is determined based on the service flow template in the PCC rule.
  • Upstream FAR can be achieved by any of the following three methods:
  • Method 1 SMF determines the upstream forwarding policy ID (Forwarding Policy Id) based on the upstream traffic steering policy ID and the AF-affected business flow steering policy ID.
  • the uplink FAR includes the uplink forwarding policy identifier.
  • the service flow steering policy identifier used to determine the AF impact of the uplink forwarding policy identifier has a corresponding relationship with the DNAI corresponding to the determined UPF.
  • Method 2 SMF determines the upstream forwarding policy ID (Forwarding Policy Id) based on the upstream service flow steering policy ID.
  • the uplink FAR includes the uplink forwarding policy identifier and N6 routing information.
  • the N6 routing information in the uplink FAR has a corresponding relationship with the DNAI corresponding to the determined UPF.
  • Method 3 SMF determines the upstream forwarding policy ID (Forwarding Policy Id) based on the upstream traffic steering policy ID and the AF-affected business flow steering policy ID.
  • the uplink FAR includes the uplink forwarding policy identifier and N6 routing information.
  • the service flow steering policy identifier used to determine the AF impact of the uplink forwarding policy identifier has a corresponding relationship with the DNAI corresponding to the determined UPF.
  • the N6 routing information in the upstream FAR corresponds to the DNAI corresponding to the determined UPF.
  • the downlink PDR is used to match the downlink business flow.
  • the downlink PDR includes the source interface of the incoming packet (Source Interface of incoming packet), and also includes the business data flow filter or application identifier. Among them, the source interface of the incoming data packet
  • the value is Core (indicating downlink), and the service data flow filter can be five-tuple information.
  • the service data flow filter or application identifier is determined based on the service flow template in the PCC rule.
  • the downlink FAR includes the downlink forwarding policy identifier, which is determined by the SMF based on the downlink service flow steering policy identifier.
  • Step 608 SMF sends the N4 rule to UPF.
  • SMF sends N4 rules to UPF during the N4 session modification process.
  • Step 609 UPF processes the service data of the service flow according to the N4 rule.
  • UPF For uplink service data, when UPF matches the application's uplink service data based on the uplink PDR, UPF determines the uplink FAR corresponding to the uplink PDR and executes the local policy corresponding to the uplink FAR.
  • the local policy is any of the following:
  • UPF sends the uplink service data to the service function (Service Function) of the service chain corresponding to the local policy for processing to obtain the processed uplink service data. Then UPF adds a header to the processed uplink service data. The header carries N6 routing information, then the UPF sends the upstream service data with the header added to the switch, and the switch directs the service flow of the upstream service data with the header added to the AF deployed in the DN based on the N6 routing information.
  • Service Function Service Function
  • UPF For downlink service data, when UPF matches the application's downlink service data based on the downlink PDR, UPF determines the downlink forwarding policy identifier corresponding to the downlink PDR, and executes the local policy corresponding to the downlink forwarding policy identifier.
  • the local policy is: UPF will The downlink service data is sent to the service function (Service Function) corresponding to the local policy for processing to obtain the processed downlink service data, and then the UPF sends the processed downlink service data to the base station or other UPF.
  • Service Function Service Function
  • UPF since the local policy corresponding to the uplink forwarding policy identifier in the uplink FAR received by UPF supports both the service link route of the service flow and the direction of the service flow to the DN, UPF can simultaneously forward the uplink service flow based on the uplink FAR. Executing business chain processing and business flow guidance control improves the processing efficiency of upstream business flows and improves user experience.
  • Figure 7 is a schematic flow chart of a communication method provided by an embodiment of the present application.
  • the AF when requesting network resources for the services accessed by the UE, the AF requests the core network to perform service chain processing on the services. and business flow-oriented control.
  • the method includes the following steps:
  • Step 701 AF sends a business flow impact establishment request message to NEF.
  • the business flow impact establishment request message includes business flow description information, external service function chain ID (external service function chain Id, external SFC Id) and routing requirement information (routing requirement). It also includes an external user group identifier or indication information used to indicate any UE.
  • the AF when the AF decides to request network resources and business value-added services for a group of UEs or an application accessed by any UE, and at the same time, the AF decides to perform traffic steering control (traffic steering control) of the accessed application data to a specific DN, the AF will request the PCF Send this business flow impact establishment request message.
  • traffic steering control traffic steering control
  • the service flow influence establishment request message may be a Nnef_TrafficInfluence_Create request message.
  • the business flow description information is used to describe the business flow, and may be triplet information or application identification, for example.
  • the external business chain identifier indicates a business chain, which is used to indicate the execution of business chain processing on the application's business data.
  • the external service chain identifier can be obtained through negotiation between the application and the operator.
  • the AF can provide the uplink external service chain identifier (uplinkexternal SFC Id) and the downlink external service chain identifier (downlink external SFC Id) respectively.
  • the routing requirement information indicates the service flow steering control method for service data.
  • Routing requirement information includes at least one DNAI and the N6 configuration identifier (N6 Profile ID) and/or N6 routing information (N6 routing information) corresponding to each DNAI.
  • the DNAI indicates the user plane access identifier of the DN where the AF is deployed
  • the N6 configuration identifier indicates the policy negotiated between the AF and the core network
  • the N6 routing information includes at least one of the address, port number and protocol number of the AF deployed on the DN.
  • the routing requirement information may also be called N6 routing requirement information.
  • the service flow impact establishment request message may include multiple external service chain identifiers and the DNAI corresponding to each external service chain identifier, indicating that when accessing DNs at different locations, different service chains are requested to be executed.
  • Step 702 NEF authorizes AF's request and performs corresponding mapping.
  • mapping operations performed by NEF include mapping the external business chain identifier to the internal service chain identifier (Internal service function chain Id, Internal SFC Id), and mapping the external user group identifier to the internal user group identifier.
  • NEF maps the uplink external service chain identifier and the downlink external service chain identifier to the uplink internal service chain identifier and the downlink internal service chain identifier respectively.
  • Step 703 NEF sends service flow information to UDR.
  • the service flow information includes service flow description information, internal service chain identification and routing requirement information, and also includes internal user group identification or indication information used to indicate any UE.
  • Step 704 NEF sends a service flow impact establishment response message to AF.
  • Step 705 If the PCF has previously subscribed to the UDR for information change notifications, the UDR sends the service flow information to the PCF.
  • This business flow information is the business flow information that NEF saves to UDR.
  • Step 706 The process for the UE to establish a PDU session.
  • the UE refers to a certain UE in a group of UEs described above, or any UE.
  • the UE requests to establish a PDU session, the network selects PSAUPF for the PDU, and the network allocates an address to the UE.
  • this step 706 can be performed before step 701.
  • Step 707 PCF determines PCC rules.
  • the PCF determines the PCC rule.
  • the service flow information received by the PCF in the above step 705 contains the internal user group identifier, and the PCF determines that the UE indicated by the internal user group identifier includes the UE that established the PDU session in the above step 706, then after step 706, The PCF determines the PCC rules.
  • the PCC rule includes a service flow template (SDF Template), a service flow steering policy identifier (Traffic Steering Policy Id, TSP Id) and routing description information.
  • SDF Template service flow template
  • TSP Id Service flow steering policy identifier
  • the service flow template is determined by PCF based on the service flow description information.
  • the business flow steering policy identifier is determined by the PCF based on the internal business chain identifier.
  • the PCF determines the upstream service flow steering strategy identifier based on the uplink internal service chain identifier, and determines the downlink service flow steering strategy identifier based on the downlink internal service chain identifier, as well. That is, the PCC rule includes an upstream service flow steering policy identifier and a downstream service flow steering policy identifier.
  • the traffic steering policy identifier is also called the N6-LAN Traffic Steering Policy Id (N6-LAN Traffic Steering Policy Id).
  • the routing description information includes at least one DNAI and the AF-influenced Traffic Steering Policy Id and/or N6 routing information (N6 routing Info) corresponding to each DNAI.
  • N6 routing Info N6 routing information
  • the service flow steering policy identifier affected by AF is determined by PCF based on the N6 configuration identifier.
  • the N6 routing information is the N6 routing information described in step 701 above.
  • Steps 708 to 712 are the same as steps 605 to 609 in Figure 6 .
  • Figure 8 is a schematic flowchart of a communication method provided by an embodiment of the present application.
  • the AF when requesting network resources for the services accessed by the UE, the AF requests the core network to perform service chain processing on the services. and business flow-oriented control.
  • the method includes the following steps:
  • Steps 801 to 806 are the same as steps 701 to 706 in Figure 7 .
  • Step 807 AF sends a request message to NEF.
  • the request message includes business flow description information, external service function chain Id (externalSFC Id) and routing requirement information (routing requirement).
  • the AF i.e. application server
  • the AF decides to request network resources and business value-added services for the application that the UE is accessing.
  • the AF decides to perform traffic steering control (traffic steering) on the data of the accessed application. control) to a specific DN, then AF sends the request message to NEF.
  • traffic steering control traffic steering
  • the request message may be a Nnef_AFsessionWithQoS_Create request message.
  • the business flow description information is used to describe the business flow, and may be five-tuple information, for example.
  • step 807 The meaning of the external service chain identifier and routing requirement information in step 807 is the same as the meaning of the external service chain identifier and routing requirement information in step 801.
  • the request message also includes the requested QoS requirements.
  • the request message may include multiple external service chain identifiers and the DNAI corresponding to each external service chain identifier, indicating that when accessing DNs at different locations, the execution of different service chains is requested.
  • Step 808 NEF sends a policy authorization establishment request message to PCF.
  • the policy authorization establishment request message includes service flow description information, internal service chain identification and routing requirement information.
  • NEF After receiving the request message from AF, NEF authorizes AF's request and maps the external service chain identifier to the internal service chain identifier. Then NEF sends the policy authorization establishment request message to PCF.
  • the policy authorization establishment request message may be an Npcf_PolicyAuthorization_Create request message.
  • Step 809 PCF saves the received information and returns a policy authorization establishment response message to NEF.
  • the policy authorization establishment response message includes indication information indicating acceptance of the request.
  • Step 810 NEF sends a response message to AF.
  • the response message may be an Nnef_AFsessionWithQoS_Create response message.
  • Step 811 PCF determines PCC rules.
  • the PCF determines that the information obtained in step 805 and the information obtained in step 808 can be applied to the PDU session of the UE at the same time, then the PCF determines the PCC rule.
  • the PCC rule is the same as the PCC rule in step 707 of Figure 7, and reference can be made to the foregoing description.
  • Steps 812 to 816 are the same as steps 605 to 609 in Figure 6 .
  • Figure 9 is a schematic flow chart of a communication method provided by an embodiment of the present application.
  • the AF when requesting network resources for a service accessed by the UE, the AF requests the core network to perform service chain processing and service flow on the service.
  • Guidance control for a single UE, when requesting network resources for a service accessed by the UE, the AF requests the core network to perform service chain processing and service flow on the service. Guidance control.
  • the method includes the following steps:
  • Steps 901 to 903 are the same as steps 601 to 603 in Figure 6 .
  • Step 904 PCF determines PCC rules.
  • the routing requirement information received by PCF in step 602 above includes at least one DNAI and the N6 Profile ID corresponding to each DNAI. Then PCF will use the service chain ID received in step 602 and the N6 Profile ID corresponding to each DNAI.
  • the N6 configuration identifier determines the service flow steering policy identifier corresponding to each DNAI, and the PCF determines the service flow template according to the service flow description information received in step 602. Therefore, the PCC rule determined by the PCF includes the service flow template and route description information, and the route description information includes at least one DNAI and the service flow steering policy identifier corresponding to each DNAI.
  • the routing requirement information received by PCF in step 602 above includes at least one DNAI and the N6 Profile ID and N6 routing information (N6 routing information) corresponding to each DNAI. Then PCF receives the information in step 602 according to the The service chain identifier and the N6 configuration identifier corresponding to each DNAI determine the service flow steering policy identifier corresponding to each DNAI, and the PCF determines the service flow template according to the service flow description information received in step 602. Therefore, the PCC rule determined by the PCF includes the service flow template and route description information.
  • the route description information includes at least one DNAI and the service flow steering policy identifier and N6 routing information corresponding to each DNAI.
  • the routing requirement information received by PCF in step 602 above includes at least one DNAI and the N6 routing information (N6 routing information) corresponding to each DNAI.
  • PCF determines the business flow steering policy identifier based on the service chain identifier received in step 602. , and the PCF determines the service flow template according to the service flow description information received in step 602. Therefore, the PCC rule determined by the PCF includes the service flow template, the service flow steering policy identifier and route description information.
  • the route description information includes at least one DNAI and N6 routing information corresponding to each DNAI.
  • Step 905 PCF sends PCC rules to SMF.
  • PCF sends an Npcf_SMPolicyControl_UpdateNotify Request message to SMF, which includes PCC rules.
  • Step 906 SMF sends a response message to PCF after installing the PCC rule.
  • the response message is the Npcf_SMPolicyControl_UpdateNotify Response message.
  • Step 907 SMF determines the N4 rule based on the PCC rule.
  • the SMF determines the UPF based on at least one DNAI in the UE's location information, network topology, and routing description information.
  • the UPF may be the UPF closest to the UE among the UPFs corresponding to the at least one DNAI.
  • SMF After SMF selects a UPF, it determines N4 rules for the UPF based on PCC rules.
  • the N4 rule includes upstream PDR and upstream FAR, and downstream PDR and downstream FAR.
  • the upstream PDR is used to match the upstream business flow.
  • the upstream PDR includes the source interface of the incoming packet (Source Interface of incoming packet), and also includes the business data flow filter or application identifier.
  • the source of the incoming data packet The value of the interface is Access (indicating uplink), and the service data flow filter can be five-tuple information.
  • the service data flow filter or application identifier is determined based on the service flow template in the PCC rule.
  • Upstream FAR can be achieved by any of the following three methods:
  • the SMF determines the uplink forwarding policy ID (Forwarding Policy Id) based on the upstream service flow steering policy ID.
  • the uplink FAR includes the uplink forwarding policy identifier.
  • the upstream service flow steering policy identifier has a corresponding relationship with the DNAI corresponding to the determined UPF.
  • the SMF determines the uplink forwarding policy ID (Forwarding Policy Id) based on the upstream service flow steering policy ID.
  • the uplink FAR includes the uplink forwarding policy identifier and N6 routing information.
  • the upstream service flow steering policy identifier has a corresponding relationship with the DNAI corresponding to the determined UPF.
  • the N6 routing information in the upstream FAR corresponds to the DNAI corresponding to the determined UPF.
  • the SMF determines the uplink forwarding policy ID (Forwarding Policy Id) based on the upstream service flow steering policy ID.
  • the uplink FAR includes the uplink forwarding policy identifier and N6 routing information.
  • the N6 routing information in the uplink FAR has a corresponding relationship with the DNAI corresponding to the determined UPF.
  • the downlink PDR is used to match the downlink business flow.
  • the downlink PDR includes the source interface of the incoming packet (Source Interface of incoming packet), and also includes the business data flow filter or application identifier. Among them, the source interface of the incoming data packet
  • the value is Core (indicating downlink), and the service data flow filter can be five-tuple information.
  • the service data flow filter or application identifier is determined based on the service flow template in the PCC rule.
  • the downlink FAR includes the downlink forwarding policy identifier, which is determined by the SMF based on the downlink service flow steering policy identifier.
  • Step 908 SMF sends the N4 rule to UPF.
  • SMF sends N4 rules to UPF during the N4 session modification process.
  • Step 909 UPF processes the service data of the service flow according to the N4 rule.
  • step 909 For specific implementation of step 909, please refer to step 609.
  • Figure 10 is a schematic flow chart of a communication method provided by an embodiment of the present application.
  • the AF when requesting network resources for the services accessed by the UE, the AF requests the core network to perform service chain processing on the services. and business flow-oriented control.
  • the method includes the following steps:
  • Steps 1001 to 1006 are the same as steps 701 to 706 described above.
  • Step 1007 PCF determines PCC rules.
  • the PCF determines the PCC rule.
  • the service flow information received by the PCF in the above step 1005 contains the internal user group identifier, and the PCF determines that the UE indicated by the internal user group identifier includes the UE that established the PDU session in the above step 1006, then after step 1006, The PCF determines the PCC rules.
  • the routing requirement information received by PCF in step 1005 above includes at least one DNAI and the N6 Profile ID corresponding to each DNAI.
  • PCF corresponds to the internal service chain ID received in step 1005 and corresponds to each DNAI.
  • the N6 configuration identifier determines the service flow steering policy identifier corresponding to each DNAI, and the PCF determines the service flow template according to the service flow description information received in step 1005. Therefore, the PCC rule determined by the PCF includes the service flow template and route description information, and the route description information includes at least one DNAI and the service flow steering policy identifier corresponding to each DNAI.
  • the routing requirement information received by PCF in step 1005 above includes at least one DNAI and the N6 Profile ID and N6 routing information (N6 routing information) corresponding to each DNAI.
  • PCF receives the information in step 1005 according to the The internal service chain identifier and the N6 configuration identifier corresponding to each DNAI determine the service flow steering policy identifier corresponding to each DNAI, and the PCF determines the service flow template according to the service flow description information received in step 1005. Therefore, the PCC rule determined by the PCF includes the service flow template and route description information.
  • the route description information includes at least one DNAI and the service flow steering policy identifier and N6 routing information corresponding to each DNAI.
  • the routing requirement information received by PCF in step 1005 above includes at least one DNAI and the N6 routing information (N6 routing information) corresponding to each DNAI.
  • PCF determines the business flow steering strategy based on the internal service chain identifier received in step 1005. identification, and the PCF determines the service flow template based on the service flow description information received in step 1005. Therefore, the PCC rule determined by the PCF includes the service flow template, the service flow steering policy identifier and route description information.
  • the route description information includes at least one DNAI and N6 routing information corresponding to each DNAI.
  • Steps 1008 to 1012 are the same as steps 905 to 909 described above.
  • Figure 11 is a schematic flow chart of a communication method provided by an embodiment of the present application.
  • the AF when requesting network resources for the services accessed by the UE, the AF requests the core network to perform service chain processing on the services. and business flow-oriented control.
  • the method includes the following steps:
  • Steps 1101 to 1110 are the same as steps 801 to 810 described above.
  • Steps 1111 to 1116 are the same as steps 1007 to 1012 described above.
  • Figure 12 is a schematic flowchart of a communication method provided by an embodiment of the present application. The method includes the following steps:
  • Step 1201 UPF determines the first packet detection rule (first PDR) that matches the applied service data.
  • the UPF receives the application's service data (such as uplink service data), and then the UPF matches the service data according to multiple PDRs on the UPF and determines a PDR.
  • the determined PDR is called the first PDR.
  • the first PDR includes the source interface of the incoming packet (Source Interface of incoming packet), and also includes the business data flow filter or application identification. Among them, the value of the source interface of the incoming data packet is Access (indicating uplink), and the service data flow filter can be five-tuple information. The service data flow filter or application identifier is determined based on the service flow template in the PCC rule.
  • Step 1202 The UPF executes the first forwarding policy corresponding to the first forwarding action rule associated with the first packet detection rule on the service data.
  • the first forwarding strategy is also called a first routing strategy, a first sending strategy or a first transmission strategy, etc.
  • Each PDR is associated with a forwarding action rule (FAR). Therefore, after UPF determines the first PDR that matches the service data, it can determine the first FAR associated with the first PDR, and then determine the first forwarding corresponding to the first FAR. Strategy.
  • FAR forwarding action rule
  • multiple forwarding policies are preconfigured on UPF, and different FARs correspond to different forwarding policies.
  • each application data flow corresponds to one or more PDRs (different PDRs can be based on different information such as the source interface of the incoming data packets).
  • PDR PDR
  • FAR FAR
  • UPF implements different forwarding strategies for business data of different applications.
  • the forwarding policy configured on UPF is a policy pre-negotiated between the application and the network or pre-configured according to the operator's policy.
  • the forwarding policies negotiated between different applications and networks can be the same or different.
  • the first forwarding policy is used to perform local area network service flow guidance on application service data.
  • local area network traffic steering (local area network traffic steering) is also called N6-LAN traffic steering (N6-LAN traffic steering).
  • N6-LAN traffic steering After being processed by the business function network elements deployed in the LAN, UPF obtains the processed business data.
  • UPF's first forwarding strategy for the service data refers to directing the service data of the application to the service function network element in the local area network, and the service function network element performs service chain processing on the service data of the application.
  • the guidance here refers to sending.
  • Step 1203 The UPF determines a second packet detection rule (second PDR) that matches the service data processed by the service function network element deployed in the local area network.
  • second PDR second packet detection rule
  • the UPF receives the service data processed by the service function network element deployed on the LAN, and then the UPF matches the service data according to multiple PDRs on the UPF and determines a PDR.
  • the determined PDR is called the second PDR.
  • the second PDR includes the source interface of the incoming packet (Source Interface of incoming packet), and also includes the service data flow filter or application identifier, where the value of the source interface of the incoming packet is N6-LAN (or SGi-LAN), the service data flow filter can be a five-tuple message.
  • the service data flow filter or application identifier is determined based on the service flow template in the PCC rule.
  • Step 1204 UPF executes the second forwarding policy corresponding to the second forwarding action rule associated with the second packet detection rule on the service data processed by the service function network element deployed in the local area network.
  • the second forwarding strategy is used to perform data network routing and business flow steering on the service data processed by the service function network element deployed in the local area network to send the processed service data to the local data network, which is the server of the application.
  • the data network in which the application is located therefore sending the processed business data to the local data network refers to sending the processed business data to the server of the application in the local data network.
  • data network routing traffic steering is also called local data network routing business flow steering, local routing business flow steering or AF-influenced traffic steering (AF-influenced traffic steering).
  • UPF performs LAN business flow steering on the application's business data, and performs data network routing business flow steering on the business data processed by the business function network elements deployed in the LAN to send the processed business data to the local data network.
  • UPF performs LAN business flow steering on the application's business data, and performs data network routing business flow steering on the business data processed by the business function network elements deployed in the LAN to send the processed business data to the local data network.
  • Figure 3 For specific examples, please refer to Figure 3.
  • the first forwarding strategy determined by UPF can implement LAN business flow guidance for business data and improve the transmission quality and transmission bandwidth of business data.
  • the second forwarding strategy determined by UPF can perform data network routing and business flow guidance on the business data processed by the business function network elements deployed in the LAN, so as to send the processed business data to the local data network, thereby enabling users to access the local area nearby.
  • Applications in Data Networks On the one hand, this solution improves the transmission quality and bandwidth of business data. On the other hand, it enables users to access applications in local data packages nearby, thereby improving the transmission performance of business data and thus improving user experience.
  • the first forwarding policy and the second forwarding policy are obtained through two different FARs, where the first forwarding policy is used to Perform LAN business flow steering on the application's business data, and the second forwarding policy is used to perform data network routing business flow steering on the business data processed by the business function network element deployed on the LAN to send the processed business data to local data.
  • the first forwarding policy is used to Perform LAN business flow steering on the application's business data
  • the second forwarding policy is used to perform data network routing business flow steering on the business data processed by the business function network element deployed on the LAN to send the processed business data to local data.
  • Network accordingly, in order to obtain the two FARs, UPF needs to perform two data matching operations.
  • the first time is to perform data matching on the application's service data and match the first PDR.
  • the first PDR is associated with the first FAR.
  • the first FAR indicates the first forwarding strategy
  • the second time is to perform data matching on the service data processed by the service function network element deployed in the LAN, and match the second PDR.
  • the second PDR is associated with the second FAR.
  • Two FAR indicates the second forwarding policy.
  • a forwarding policy is obtained through a FAR.
  • This forwarding policy is not only used to perform LAN business flow guidance on the application's business data, but also used to process the business function network elements deployed in the LAN.
  • the business data performs data network routing and business flow guidance to send the processed business data to the local data network.
  • UPF performs a data matching operation, performs data matching on the application's business data, and matches to A PDR associated with a FAR indicating the forwarding policy.
  • Figure 13(a) is a schematic flowchart of a communication method provided by an embodiment of the present application.
  • the SMF receives a LAN business flow steering policy identifier and a data network routing control information from the PCF, and then the SMF determines the first forwarding action rule based on the LAN business flow steering policy identifier and the data network routing control information. Determine the second forwarding action rule.
  • the method includes the following steps:
  • Step 1301a PCF sends PCC rules to SMF.
  • This step 1301a is the same as the above-mentioned step 401a, and its specific implementation may refer to the above-mentioned step 401a.
  • the content contained in the PCC rule is divided into the following three situations. For details, refer to step 401a.
  • Step 1302a The SMF determines a first forwarding action rule (first FAR) based on the LAN service flow steering policy identifier, and determines a second forwarding action rule (second FAR) based on the data network routing control information.
  • first FAR first forwarding action rule
  • second FAR second forwarding action rule
  • step 1302a is specifically: SMF determines the first policy identifier based on the LAN service flow steering policy identifier, and then determines the first FAR based on the first policy identifier.
  • the first FAR includes the first policy identifier, and the SMF data from Determine the target DNAI from at least one DNAI in the network routing control information, determine the data network routing service flow steering strategy identifier corresponding to the target DNAI from the data network routing service flow steering strategy identifier corresponding to the at least one DNAI, and determine the data network routing service flow steering strategy identifier corresponding to the target DNAI according to the data corresponding to the target DNAI
  • the network routing service flow steering policy identifier determines the second policy identifier, and then the SMF determines the second FAR according to the second policy identifier, and the second FAR includes the second policy identifier.
  • UPF determines the forwarding strategy according to the following method: UPF determines the first forwarding strategy according to the first policy identifier in the first FAR, and determines the first forwarding strategy according to the second FAR in the second FAR.
  • the policy identifier determines the second forwarding policy.
  • step 1302a is specifically: SMF determines the first policy identifier according to the LAN service flow steering policy identifier, and then determines the first FAR according to the first policy identifier.
  • the first FAR includes the first policy identifier, and the SMF data from Determine the target DNAI from at least one DNAI in the network routing control information, determine the data network routing information corresponding to the target DNAI from the data network routing information corresponding to the at least one DNAI, and determine the second FAR based on the data network routing information corresponding to the target DNAI,
  • the second FAR includes data network routing information corresponding to the target DNAI.
  • the second FAR includes an Outer Header Creation parameter
  • the Outer Header Creation parameter includes data network routing information corresponding to the target DNAI.
  • step 1302a is specifically: SMF determines the first policy identifier according to the LAN service flow steering policy identifier, and then determines the first FAR according to the first policy identifier.
  • the first FAR includes the first policy identifier, and the SMF determines the first policy identifier from at least Among the data network routing service flow steering policy identifiers corresponding to one DNAI, determine the data network routing service flow steering policy identifier corresponding to the target DNAI, and determine the data network routing information corresponding to the target DNAI from the data network routing information corresponding to at least one DNAI,
  • the SMF determines the second policy identifier based on the data network routing service flow steering policy identifier corresponding to the target DNAI, and then the SMF determines the second FAR based on the second policy identifier and the data network routing information corresponding to the target DNAI.
  • the second FAR includes the second policy identifier. Data network routing information corresponding to the target DNAI.
  • the second FAR includes a second policy identifier and an Outer Header Creation parameter.
  • the Outer Header Creation parameter includes data network routing information corresponding to the target DNAI.
  • Step 1303a SMF sends the first forwarding action rule and the second forwarding action rule to the UPF.
  • the SMF also sends the first PDR associated with the first forwarding action rule and the second PDR associated with the second forwarding action rule to the UPF.
  • the first PDR includes the source interface of the incoming packet (Source Interface of incoming packet), and also includes the service data flow filter or application identifier, where the value of the source interface of the incoming data packet is Access (indicating upstream) ,
  • the business data flow filter can be five-tuple information.
  • the service data flow filter or application identifier is determined based on the service flow template in the PCC rule.
  • the second PDR includes the source interface of the incoming packet (Source Interface of incoming packet), and also includes the service data flow filter or application identifier, where the value of the source interface of the incoming packet is N6-LAN (or SGi-LAN), the service data flow filter can be a five-tuple message.
  • the service data flow filter or application identifier is determined based on the service flow template in the PCC rule.
  • the SMF determines that the UPF supports local area network service flow steering and data network routing service flow steering. If the current UPF does not support LAN service flow steering and data network routing service flow steering, SMF will select a supported UPF and offload the service data to the UPF, or reselect a UPF and combine the first forwarding action rule and the second forwarding action rule. Two forwarding action rules are sent to the newly selected UPF.
  • the first forwarding action rule sent by SMF to UPF is used by UPF to first perform LAN business flow steering on the service data
  • the second forwarding action rule sent by SMF to UPF is used by UPF to perform data network routing service on the processed service data.
  • Traffic steering enables users to access applications in local data networks nearby.
  • this solution improves the transmission quality and bandwidth of business data.
  • it enables users to access applications in local data packages nearby, thereby improving the transmission performance of business data and improving user experience.
  • Figure 13(b) is a schematic flowchart of a communication method provided by an embodiment of the present application.
  • the SMF receives at least two LAN business flow steering policy identifiers and one data network routing control information from the PCF, and then the SMF determines the third LAN service flow steering policy identifier and one data network routing control information based on the at least two LAN business flow steering policy identifiers and one data network routing control information.
  • a forwarding action rule and a second forwarding action rule is a forwarding action rule.
  • the method includes the following steps:
  • Step 1301b PCF sends PCC rules to SMF.
  • This step 1301b is the same as the above-mentioned step 401b, and its specific implementation may refer to the above-mentioned step 401b.
  • the content contained in the PCC rule is divided into the following three situations. For details, refer to step 401b.
  • Step 1302b SMF determines the first forwarding action rule (first FAR) based on the LAN service flow steering policy identifiers corresponding to at least two DNAIs, and determines the second forwarding action rule (second FAR) based on the data network routing control information.
  • first FAR first forwarding action rule
  • second FAR second forwarding action rule
  • step 1302b is specifically: SMF determines the target DNAI from at least two DNAIs in the data network routing control information, and then SMF determines the target DNAI from the LAN business flow steering policy identifiers corresponding to the at least two DNAIs.
  • SMF determines the first policy identifier according to the LAN service flow steering policy identifier corresponding to the target DNAI, and then determines the first FAR according to the first policy identifier, the first FAR includes the first policy identifier, and SMF determines the first policy identifier from Determine the data network routing service flow steering policy identifier corresponding to the target DNAI from the data network routing service flow steering policy identifiers corresponding to at least two DNAIs, and determine the second policy identifier according to the data network routing service flow steering policy identifier corresponding to the target DNAI, The SMF then determines the second FAR based on the second policy identifier, and the second FAR includes the second policy identifier.
  • UPF determines the forwarding strategy according to the following method: UPF determines the first forwarding strategy according to the first policy identifier in the first FAR, and determines the first forwarding strategy according to the second FAR in the second FAR.
  • the policy identifier determines the second forwarding policy.
  • step 1302b is specifically: SMF determines the target DNAI from at least two DNAIs in the data network routing control information, and then SMF determines the target DNAI from the LAN business flow steering policy identifier corresponding to at least two DNAIs.
  • the second FAR includes the data network corresponding to the target DNAI. routing information.
  • the second FAR includes an Outer Header Creation parameter, and the Outer Header Creation parameter includes data network routing information corresponding to the target DNAI.
  • UPF determines the forwarding strategy according to the following method: UPF determines the first forwarding strategy according to the first policy identifier in the first FAR, and determines the first forwarding strategy according to the target DNAI in the second FAR. The corresponding data network routing information determines the second forwarding strategy.
  • step 1302b is specifically: SMF determines the target DNAI from at least two DNAIs in the data network routing control information, and then SMF determines the target DNAI from the LAN business flow steering policy identifiers corresponding to the at least two DNAIs.
  • SMF determines the first policy identifier according to the LAN business flow steering policy identifier corresponding to the target DNAI, and then determines the first FAR according to the first policy identifier, the first FAR includes the first policy identifier, and SMF Determine the data network routing service flow steering policy identifier corresponding to the target DNAI from the data network routing service flow steering policy identifier corresponding to at least one DNAI, and determine the data network route corresponding to the target DNAI from the data network routing information corresponding to at least one DNAI information, the SMF determines the second policy identifier based on the data network routing service flow steering policy identifier corresponding to the target DNAI, and then the SMF determines the second FAR based on the second policy identifier and the data network routing information corresponding to the target DNAI.
  • the second FAR includes the second The data network routing information corresponding to the policy identifier and target DNAI.
  • the second FAR includes a second policy identifier and an Outer Header Creation parameter.
  • the Outer Header Creation parameter includes data network routing information corresponding to the target DNAI.
  • Step 1303b SMF sends the first forwarding action rule and the second forwarding action rule to the UPF.
  • the SMF also sends the first PDR associated with the first forwarding action rule and the second PDR associated with the second forwarding action rule to the UPF.
  • the first PDR includes the source interface of the incoming packet (Source Interface of incoming packet), and also includes the service data flow filter or application identifier, where the value of the source interface of the incoming data packet is Access (indicating upstream) ,
  • the business data flow filter can be five-tuple information.
  • the service data flow filter or application identifier is determined based on the service flow template in the PCC rule.
  • the second PDR includes the source interface of the incoming packet (Source Interface of incoming packet), and also includes the service data flow filter or application identifier, where the value of the source interface of the incoming packet is N6-LAN (or SGi-LAN), the service data flow filter can be a five-tuple message.
  • the service data flow filter or application identifier is determined based on the service flow template in the PCC rule.
  • the SMF determines that the UPF supports local area network service flow steering and data network routing service flow steering. If the current UPF does not support LAN service flow steering and data network routing service flow steering, SMF will select a supported UPF and offload the service data to the UPF, or reselect a UPF and combine the first forwarding action rule and the second forwarding action rule. Two forwarding action rules are sent to the newly selected UPF.
  • the first forwarding action rule sent by SMF to UPF is used by UPF to first perform LAN business flow steering on the service data
  • the second forwarding action rule sent by SMF to UPF is used by UPF to perform data network routing service on the processed service data.
  • Traffic steering enables users to access applications in local data networks nearby.
  • this solution improves the transmission quality and bandwidth of business data.
  • it enables users to access applications in local data packages nearby, thereby improving the transmission performance of business data and improving user experience.
  • this solution can provide multiple LAN business flow steering policy identifiers, and select the LAN business flow steering policy identifier to be used from multiple LAN business flow steering policy identifiers, which helps to improve the accuracy of the forwarding strategy and thereby improve the delivery of business data. Speed and accuracy further enhance user experience.
  • FIG. 12 The embodiments of FIG. 12 , FIG. 13( a ) and FIG. 13( b ) will be described in detail below with reference to the specific examples shown in FIGS. 14 to 16 .
  • N6 Profile ID in the following embodiments has the same meaning as the configuration ID in the previous embodiments
  • N6 routing information (N6 routing Info) in the following embodiments has the same meaning as the data in the previous embodiments.
  • the network routing information has the same meaning.
  • the business flow steering policy identifier in the following embodiments has the same meaning as the LAN business flow steering policy identifier and the service flow steering policy identifier in the previous embodiment.
  • the policy identifier has the same meaning as the data network routing service flow steering policy identifier in the previous embodiment
  • the local policy in the following embodiment has the same meaning as the forwarding policy in the previous embodiment.
  • Figure 14 is a schematic flowchart of a communication method provided by an embodiment of the present application.
  • the AF when requesting network resources for a service accessed by the UE, the AF requests the core network to perform service chain processing and service flow steering control on the service.
  • the method includes the following steps:
  • Steps 1401 to 1406 are the same as steps 601 to 606 in the embodiment of FIG. 6 .
  • Step 1407 SMF determines the N4 rule based on the PCC rule.
  • the SMF determines the UPF based on at least one DNAI in the UE's location information, network topology, and routing description information.
  • the UPF may be the UPF closest to the UE among the UPFs corresponding to the at least one DNAI.
  • SMF After SMF selects a UPF, it determines N4 rules for the UPF based on PCC rules.
  • the N4 rules include uplink packet detection rules (uplink PDR) and uplink forwarding action rules (uplink FAR), and also include downlink PDR and downlink FAR.
  • uplink PDR uplink packet detection rules
  • uplink FAR uplink forwarding action rules
  • the uplink PDR is used to match the uplink service flow.
  • the uplink PDR includes a first PDR and a second PDR
  • the uplink FAR includes a first FAR and a second FAR.
  • the first PDR is associated with the first FAR
  • the second PDR is associated with the second FAR.
  • the first PDR includes the source interface of the incoming packet (Source Interface of incoming packet), and also includes the business data flow filter or application identifier, where the value of the source interface of the incoming data packet is Access (representing upstream), the service data flow filter can be five-tuple information.
  • the service data flow filter or application identifier is determined based on the service flow template in the PCC rule.
  • the second PDR includes the source interface of the incoming packet (Source Interface of incoming packet), and also includes the service data flow filter or application identifier, where the value of the source interface of the incoming packet is N6-LAN (or SGi-LAN), the service data flow filter can be a five-tuple message.
  • the service data flow filter or application identifier is determined based on the service flow template in the PCC rule.
  • the first FAR and the second FAR can be realized by any of the following three methods:
  • Method 1 SMF determines the first policy identifier according to the uplink traffic steering policy identifier, and then determines the first FAR according to the first policy identifier.
  • the first FAR includes the first policy identifier and at least one of the SMF routing control information from the data network.
  • the second policy identifier, and then the SMF determines a second FAR according to the second policy identifier, and the second FAR includes the second policy identifier.
  • UPF determines the forwarding strategy according to the following method: UPF determines the first forwarding strategy according to the first policy identifier in the first FAR, and determines the first forwarding strategy according to the second FAR in the second FAR.
  • the policy identifier determines the second forwarding policy.
  • Method 2 SMF determines the first policy identifier according to the uplink traffic steering policy identifier, and then determines the first FAR according to the first policy identifier.
  • the first FAR includes the first policy identifier and at least one of the SMF routing control information from the data network. Determine the target DNAI in the DNAI, determine the N6 routing information corresponding to the target DNAI from the N6 routing information corresponding to at least one DNAI, and determine the second FAR based on the N6 routing information corresponding to the target DNAI.
  • the second FAR includes the N6 route corresponding to the target DNAI. information.
  • the second FAR includes an Outer Header Creation parameter, and the Outer Header Creation parameter includes N6 routing information corresponding to the target DNAI. Among them, the N6 routing information in the second FAR has a corresponding relationship with the DNAI corresponding to the determined UPF.
  • UPF determines the forwarding strategy according to the following method: UPF determines the first forwarding strategy according to the first policy identifier in the first FAR, and determines the first forwarding strategy according to the target DNAI in the second FAR. The corresponding N6 routing information determines the second forwarding strategy.
  • Method 3 SMF determines the first policy identifier based on the uplink service flow steering policy identifier, and then determines the first FAR based on the first policy identifier.
  • the first FAR includes the first policy identifier, and the services affected by the SMF from the AF corresponding to at least one DNAI.
  • the flow steering policy identifier determine the service flow steering policy identifier corresponding to the AF affected by the target DNAI. From the N6 routing information corresponding to at least one DNAI, determine the N6 routing information corresponding to the target DNAI.
  • the SMF determines the service affected by the AF corresponding to the target DNAI.
  • the flow steering policy identifier determines the second policy identifier, and then the SMF determines the second FAR based on the second policy identifier and the N6 routing information corresponding to the target DNAI.
  • the second FAR includes the second policy identifier and the N6 routing information corresponding to the target DNAI.
  • the second FAR includes a second policy identifier and an Outer Header Creation parameter.
  • the Outer Header Creation parameter includes N6 routing information corresponding to the target DNAI.
  • the service flow steering policy identifier used to determine the AF impact of the second policy identifier has a corresponding relationship with the DNAI corresponding to the determined UPF.
  • the N6 routing information in the second FAR has a corresponding relationship with the DNAI corresponding to the determined UPF.
  • UPF determines the forwarding strategy according to the following method: UPF determines the first forwarding strategy according to the first policy identifier in the first FAR, and determines the first forwarding strategy according to the second FAR in the second FAR.
  • the N6 routing information corresponding to the policy identifier and the target DNAI determines the second forwarding policy.
  • the downlink PDR is used to match the downlink business flow.
  • the downlink PDR includes the source interface of the incoming packet (Source Interface of incoming packet), and also includes the business data flow filter or application identifier. Among them, the source interface of the incoming data packet The value is Core (indicating downlink), and the service data flow filter can be five-tuple information.
  • the downlink FAR includes the downlink forwarding policy identifier, which is determined by the SMF based on the downlink service flow steering policy identifier.
  • Step 1408 SMF sends the N4 rule to UPF.
  • SMF sends N4 rules to UPF during the N4 session modification process.
  • Step 1409 UPF processes the service data of the service flow according to N4 rules.
  • the local policy is: UPF performs LAN business flow steering on the application's business data, that is, sends the uplink business data to the service function (Service Function) network element of the service chain deployed in the LAN corresponding to the local policy for processing. Then UPF receives the service data processed by the service function network element deployed in the LAN, and UPF matches the processed service data according to the second PDR. UPF determines the second FAR corresponding to the second PDR, and executes the second FAR.
  • Service Function Service Function
  • the local policy corresponding to the FAR (also called the second forwarding policy), the local policy is: perform data network routing business flow steering on the business data processed by the business function network element deployed in the LAN to send the processed business data to the local data network.
  • the local data network is the data network where the server of the application is located, so sending the processed business data to the local data network means sending the processed business data to the server of the application in the local data network ( AF).
  • UPF For downlink service data, when UPF matches the application's downlink service data based on the downlink PDR, UPF determines the downlink forwarding policy identifier corresponding to the downlink PDR, and executes the local policy corresponding to the downlink forwarding policy identifier.
  • the local policy is: UPF will The downlink service data is sent to the service function (Service Function) corresponding to the local policy for processing to obtain the processed downlink service data, and then the UPF sends the processed downlink service data to the base station or other UPF.
  • Service Function Service Function
  • UPF since the local policy corresponding to the first FAR received by UPF supports the service link route of the service flow, and the local policy corresponding to the second FAR received by UPF supports directing the service flow to the DN, UPF can therefore direct the service flow to the DN according to the first FAR. and the second FAR perform business chain processing and business flow guidance control on the upstream business flow, which improves the processing efficiency of the upstream business flow and can improve user experience.
  • Figure 15 is a schematic flowchart of a communication method provided by an embodiment of the present application.
  • the AF when requesting network resources for the services accessed by the UE, the AF requests the core network to perform service chain processing on the services. and business flow-oriented control.
  • the method includes the following steps:
  • Steps 1501 to 1507 are the same as steps 701 to 707 in Figure 7 .
  • Steps 1508 to 1512 are the same as steps 1405 to 1409 in Figure 14 .
  • Figure 16 is a schematic flow chart of a communication method provided by an embodiment of the present application.
  • the AF when requesting network resources for the services accessed by the UE, the AF requests the core network to perform service chain processing on the services. and business flow-oriented control.
  • the method includes the following steps:
  • Steps 1601 to 1611 are the same as steps 801 to 811 in Figure 8 .
  • Steps 1612 to 1616 are the same as steps 1405 to 1409 in Figure 14 .
  • the user plane network element, session management network element or policy control network element includes corresponding hardware structures and/or software modules for executing each function.
  • the units and method steps of each example described in conjunction with the embodiments disclosed in this application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed by hardware or computer software driving the hardware depends on the specific application scenarios and design constraints of the technical solution.
  • Figures 17 and 18 are schematic structural diagrams of possible communication devices provided by embodiments of the present application. These communication devices can be used to implement the functions of the user plane network element, session management network element or policy control network element in the above method embodiments, and therefore can also achieve the beneficial effects of the above method embodiments.
  • the communication device may be a user plane network element, a session management network element, or a policy control network element, or it may be a module applied to a user plane network element, a session management network element, or a policy control network element (such as chips).
  • the communication device 1700 shown in FIG. 17 includes a processing unit 1710 and a transceiver unit 1720.
  • the communication device 1700 is used to implement the functions of the user plane network element, session management network element or policy control network element in the above method embodiment.
  • the processing unit 1710 is used to determine the packet detection rule that matches the application service data, and determine the forwarding action rule corresponding to the packet detection rule; and Execute the forwarding policy corresponding to the forwarding action rule on the business data.
  • the forwarding policy is used to perform LAN business flow guidance on the business data, and perform data network routing services on the business data processed by the business function network element deployed in the LAN.
  • the flow director is used to send the processed business data to the local data network.
  • the forwarding action rule includes a forwarding policy identifier, and the forwarding policy identifier is determined based on the application's LAN business flow steering policy identifier and the application's data network routing business flow steering policy identifier; wherein, the application's The LAN business flow steering policy identifier is used to perform LAN business flow steering for the business data.
  • the data network routing business flow steering policy identifier of the application is used to perform data network routing business flow steering for the business data.
  • the data network routing service of the application The flow steering policy identifier corresponds to the data network access identifier DNAI of the local data network.
  • the processing unit 1710 is also configured to obtain the forwarding policy according to the forwarding policy identifier.
  • the forwarding action rule includes a forwarding policy identifier and data network routing information.
  • the forwarding policy identifier is determined based on the LAN business flow steering policy identifier of the application; wherein the LAN business flow steering policy identifier of the application is used
  • the data network routing information is used to perform data network routing business flow guidance on the business data.
  • the data network routing information includes the address, port number or protocol number of the application server. At least one of the data network routing information corresponds to the DNAI of the local data network.
  • the forwarding action rule includes a forwarding policy identifier and data network routing information, and the forwarding policy identifier is determined based on the application's LAN business flow steering policy identifier and the application's data network routing business flow steering policy identifier; Among them, the LAN business flow steering policy identifier of the application is used to perform LAN business flow steering on the business data, and the data network routing business flow steering policy identifier of the application and the data network routing information are both used to perform data network routing on the service data. Routing business flow guidance.
  • the application's data network routing business flow guidance policy identifier and the data network routing information correspond to the DNAI of the local data network.
  • the data network routing information includes the address, port number or protocol number of the application's server. at least one of them.
  • the processing unit 1710 is also configured to obtain the forwarding policy based on the forwarding policy identifier and the data network routing information.
  • the transceiver unit 1720 is used to receive PCC rules.
  • the PCC rules include the applied LAN business flow steering policy identification and data network routing control information.
  • the data The network routing control information includes at least one data network access identifier DNAI and a data network routing service flow steering policy identifier and/or data network routing information corresponding to the at least one DNAI.
  • the LAN business flow steering policy identifier is used for the application.
  • the business data executes LAN business flow steering.
  • the data network routing business flow steering policy identifier and the data network routing information are used to execute data network routing business flow steering for the business data of the application.
  • the data network routing information includes the server of the application. At least one of the address, port number or protocol number of The network element sends the forwarding action rule.
  • the processing unit 1710 is specifically configured to determine a target DNAI in the at least one DNAI, and the user plane network element corresponds to the target DNAI; and the data network route corresponding to the LAN business flow steering policy identifier and the target DNAI
  • the business flow steering policy identifier determines the forwarding policy identifier; wherein the forwarding action rule includes the forwarding policy identifier.
  • the forwarding action rule also includes data network routing information corresponding to the target DNAI.
  • the processing unit 1710 is specifically configured to determine the target DNAI in the at least one DNAI, and the user plane network element corresponds to the target DNAI; and determine the forwarding policy identification according to the LAN business flow steering policy identification; wherein, the The forwarding action rule includes the forwarding policy identifier and the data network routing information corresponding to the target DNAI.
  • the transceiver unit 1720 is used to receive PCC rules.
  • the PCC rules include data network routing control information and at least two data network access identifiers DNAI corresponding to each other.
  • the local area network business flow steering policy identifier, the data network routing control information includes the at least two DNAIs and the data network routing business flow steering policy identifiers and/or data network routing information corresponding to the at least two DNAIs, and the local area network business flow steering policy identifier
  • the policy identifier is used to perform LAN business flow guidance for the application's business data.
  • the data network routing business flow guidance policy identifier and the data network routing information are both used to perform data network routing business flow guidance for the application's business data.
  • the data network The routing information includes at least one of the address, port number or protocol number of the application server; the processing unit 1710 is configured to determine based on the data network routing control information and the LAN business flow steering policy identification corresponding to the at least two DNAIs respectively. Forwarding action rules; the transceiving unit 1720 is also used to send the forwarding action rules to the user plane network element.
  • the processing unit 1710 is specifically configured to determine a target DNAI among the at least two DNAIs, and the user plane network element corresponds to the target DNAI; according to the LAN business flow steering policy identifier corresponding to the target DNAI and the target DNAI The corresponding data network routing service flow steering policy identifier determines the forwarding policy identifier; wherein the forwarding action rule includes the forwarding policy identifier.
  • the forwarding action rule also includes data network routing information corresponding to the target DNAI.
  • the processing unit 1710 is specifically configured to determine a target DNAI among the at least two DNAIs, and the user plane network element corresponds to the target DNAI; and determine the forwarding strategy according to the LAN service flow steering policy identifier corresponding to the target DNAI. identification; wherein, the forwarding action rule includes the forwarding policy identification and the data network routing information corresponding to the target DNAI.
  • the transceiver unit 1720 is used to receive a service chain identifier, at least one DNAI, and a configuration identifier corresponding to the at least one DNAI.
  • the service chain identifier indicates a
  • the business chain is used to perform business chain processing on the business data of the application, and the configuration identification is used to perform data network routing and business flow guidance on the business data of the application;
  • the processing unit 1710 is used to perform business chain processing according to the business chain identification and the business data of the application.
  • the configuration identification corresponding to at least one DNAI respectively determines the LAN business flow steering policy identification corresponding to the at least one DNAI respectively, wherein the configuration identification corresponding to the at least one DNAI respectively corresponds to the business flow steering policy identification corresponding to the at least one DNAI respectively.
  • the LAN business flow steering policy identifier is used to perform LAN business flow steering for the application's business data and perform data network routing business flow steering for the application's business data; the transceiver unit 1720 is also used to send to the session management network element
  • the PCC rule includes the at least one DNAI and the service flow steering policy identifier corresponding to the at least one DNAI.
  • the transceiver unit 1720 is also used to receive data network routing information corresponding to the at least one DNAI.
  • the data network routing information is used to perform data network routing business flow guidance for the service data of the application.
  • the data network The routing information includes at least one of the address, port number or protocol number of the application server; the PCC rule also includes data network routing information corresponding to the at least one DNAI.
  • the transceiver unit 1720 is used to receive at least two DNAIs, and the configuration identifiers and service chain identifiers corresponding to the at least two DNAIs.
  • the service chain identifier indicates a service chain, which is used to perform service chain processing on the service data of the application, and the configuration identifier is used to perform data network routing and service flow guidance on the service data of the application; the processing unit 1710 is configured to perform service flow guidance according to the at least two
  • the service chain identifiers and configuration identifiers respectively corresponding to the DNAIs are determined to determine the service flow steering policy identifiers respectively corresponding to the at least two DNAIs, wherein the configuration identifiers and service chain identifiers respectively corresponding to the at least two DNAIs are the same as those of the at least two DNAIs.
  • the corresponding business flow steering policy identifiers are in one-to-one correspondence, and the LAN business flow steering policy identifier is used to perform LAN business flow steering for the application's business data and perform data network routing business flow steering for the application's business data; the transceiver unit 1720 , and is also used to send the PCC rule to the session management network element, where the PCC rule includes the at least two DNAIs and the service flow steering policy identifiers respectively corresponding to the at least two DNAIs.
  • the transceiver unit 1720 is also used to receive data network routing information corresponding to the at least two DNAIs.
  • the data network routing information is used to perform data network routing business flow guidance for the service data of the application.
  • the data The network routing information includes at least one of the address, port number, or protocol number of the application server; the PCC rule also includes data network routing information corresponding to the at least two DNAIs.
  • the processing unit 1710 is used to determine the first packet detection rule that matches the application service data; perform the first packet detection on the service data
  • the first forwarding policy corresponding to the first forwarding action rule associated with the rule, the first forwarding policy is used to perform LAN business flow guidance for the service data; determine the first forwarding policy that matches the service data processed by the service function network element deployed in the LAN
  • the second packet detection rule executes the second forwarding policy corresponding to the second forwarding action rule associated with the second packet detection rule on the processed business data, the second forwarding policy is used to execute on the processed business data
  • the data network routes the service flow direction to send the processed service data to the local data network.
  • the first forwarding action rule includes a first policy identifier, and the first policy identifier is determined based on the LAN business flow steering policy identifier of the application; wherein, the LAN business flow steering policy identifier of the application Used to perform LAN business flow steering for this business data.
  • the processing unit 1710 is also configured to obtain the first forwarding policy according to the first policy identifier.
  • the second forwarding action rule includes a second policy identifier and/or data network routing information.
  • the second policy identifier is determined based on the data network routing service flow steering policy identifier of the application.
  • the application The data network routing business flow steering policy identifier is used to perform data network routing business flow steering for the business data.
  • the data network routing information is used to perform data network routing business flow steering for the business data.
  • the data network routing information includes the application. At least one of the address, port number or protocol number of the server, the data network routing service flow steering policy identifier of the application, and the data network routing information all correspond to the data network access identifier DNAI of the local data network.
  • the processing unit 1710 is also configured to obtain the second forwarding policy according to the second policy identifier and/or the data network routing information.
  • the transceiver unit 1720 is used to receive PCC rules.
  • the PCC rules include the applied LAN business flow steering policy identification and data network routing control information.
  • the data The network routing control information includes at least one data network access identifier DNAI and a data network routing service flow steering policy identifier and/or data network routing information corresponding to the at least one DNAI.
  • the LAN business flow steering policy identifier is used for the application.
  • the business data executes LAN business flow steering.
  • the data network routing business flow steering policy identifier and the data network routing information are used to execute data network routing business flow steering for the business data of the application.
  • the data network routing information includes the server of the application.
  • the processing unit 1710 is configured to determine the first forwarding action rule according to the LAN business flow steering policy identification; determine the second forwarding action rule according to the data network routing control information;
  • the transceiver unit 1720 is also configured to send the first forwarding action rule and the second forwarding action rule to the user plane network element.
  • the processing unit 1710 is specifically configured to determine a first policy identifier according to the LAN business flow steering policy identifier, and the first policy identifier is used to indicate a first forwarding strategy; wherein the first forwarding action The rule includes the first policy identifier.
  • the data network routing control information includes at least one DNAI and the data network routing service flow steering policy identification corresponding to the at least one DNAI; the processing unit 1710 is specifically used to determine the target in the at least one DNAI.
  • DNAI the user plane network element corresponds to the target DNAI; according to the data network routing service flow steering policy identification corresponding to the target DNAI, the second policy identification is determined, and the second policy identification is used to indicate the second forwarding strategy; wherein, the third policy identification is used to indicate the second forwarding strategy;
  • the second forwarding action rule includes the second policy identifier.
  • the data network routing control information includes at least one data network access identifier DNAI and the data network routing information corresponding to the at least one DNAI; the processing unit 1710 is specifically used to determine the at least one DNAI.
  • Target DNAI the user plane network element corresponds to the target DNAI; wherein, the second forwarding action rule includes data network routing information corresponding to the target DNAI, and the data network routing information corresponding to the target DNAI is used to indicate the second forwarding strategy.
  • the data network routing control information includes at least one data network access identifier DNAI and the data network routing service flow steering policy identifier and data network routing information respectively corresponding to the at least one DNAI; the processing unit 1710, specifically Used to determine the target DNAI in the at least one DNAI, and the user plane network element corresponds to the target DNAI; determine the second policy identification according to the data network routing service flow steering policy identification corresponding to the target DNAI; wherein, the second forwarding action
  • the rule includes the data network routing information corresponding to the second policy identifier and the target DNAI, and the data network routing information corresponding to the second policy identifier and the target DNAI is used to indicate the second forwarding policy.
  • the transceiver unit 1720 is used to receive PCC rules.
  • the PCC rules include data network routing control information and at least two data network access identifiers DNAI corresponding to each other.
  • the local area network business flow steering policy identifier, the data network routing control information includes the at least two DNAIs and the data network routing business flow steering policy identifiers and/or data network routing information corresponding to the at least two DNAIs, and the local area network business flow steering policy identifier
  • the policy identifier is used to perform LAN business flow guidance for the application's business data.
  • the data network routing business flow guidance policy identifier and the data network routing information are both used to perform data network routing business flow guidance for the application's business data.
  • the data network The routing information includes at least one of the address, port number or protocol number of the server of the application; the processing unit 1710 is used to determine the first forwarding action rule according to the LAN business flow steering policy identification corresponding to the at least two DNAIs; according to The data network routing control information determines the second forwarding action rule; the transceiving unit 1720 is also configured to send the first forwarding action rule and the second forwarding action rule to the user plane network element.
  • the processing unit 1710 is specifically configured to determine a target DNAI among the at least two DNAIs, and the user plane network element corresponds to the target DNAI; and determine based on the LAN service flow steering policy identifier corresponding to the target DNAI.
  • a first policy identifier, the first policy identifier is used to indicate a first forwarding policy; wherein the first forwarding action rule includes the first policy identifier.
  • the data network routing control information includes at least one DNAI and the data network routing service flow steering policy identification corresponding to the at least one DNAI; the processing unit 1710 is specifically used to determine the target in the at least one DNAI.
  • DNAI the user plane network element corresponds to the target DNAI; according to the data network routing service flow steering policy identification corresponding to the target DNAI, the second policy identification is determined, and the second policy identification is used to indicate the second forwarding strategy; wherein, the third policy identification is used to indicate the second forwarding strategy;
  • the second forwarding action rule includes the second policy identifier.
  • the data network routing control information includes at least one data network access identifier DNAI and the data network routing information corresponding to the at least one DNAI; the processing unit 1710 is specifically used to determine the at least one DNAI.
  • Target DNAI the user plane network element corresponds to the target DNAI; wherein, the second forwarding action rule includes data network routing information corresponding to the target DNAI, and the data network routing information corresponding to the target DNAI is used to indicate the second forwarding strategy.
  • the data network routing control information includes at least one data network access identifier DNAI and the data network routing service flow steering policy identifier and data network routing information respectively corresponding to the at least one DNAI; the processing unit 1710, specifically Used to determine the target DNAI in the at least one DNAI, and the user plane network element corresponds to the target DNAI; determine the second policy identification according to the data network routing service flow steering policy identification corresponding to the target DNAI; wherein, the second forwarding action
  • the rule includes the data network routing information corresponding to the second policy identifier and the target DNAI, and the data network routing information corresponding to the second policy identifier and the target DNAI is used to indicate the second forwarding policy.
  • the communication device 1800 shown in FIG. 18 includes a processor 1810 and an interface circuit 1820.
  • the processor 1810 and the interface circuit 1820 are coupled to each other.
  • the interface circuit 1820 may be a transceiver or an input-output interface.
  • the communication device 1800 may also include a memory 1830 for storing instructions executed by the processor 1810 or input data required for the processor 1810 to run the instructions or data generated after the processor 1810 executes the instructions.
  • the processor 1810 is used to realize the function of the above processing unit 1710
  • the interface circuit 1820 is used to realize the function of the above transceiver unit 1720.
  • the processor in the embodiment of the present application can be a central processing unit (Central Processing Unit, CPU), or other general-purpose processor, digital signal processor (Digital Signal Processor, DSP), or application specific integrated circuit. (Application Specific Integrated Circuit, ASIC), Field Programmable Gate Array (FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof.
  • a general-purpose processor can be a microprocessor or any conventional processor.
  • the method steps in the embodiments of the present application can be implemented by hardware or by a processor executing software instructions.
  • Software instructions can be composed of corresponding software modules, and the software modules can be stored in random access memory, flash memory, read-only memory, programmable read-only memory, erasable programmable read-only memory, electrically erasable programmable read-only memory In memory, register, hard disk, mobile hard disk, CD-ROM or any other form of storage medium well known in the art.
  • An exemplary storage medium is coupled to the processor such that the processor can read information from the storage medium and write information to the storage medium.
  • the storage medium can also be an integral part of the processor.
  • the processor and storage media may be located in an ASIC. Additionally, the ASIC can be located in the base station or terminal equipment. Of course, the processor and the storage medium may also exist as discrete components in the base station or terminal equipment.
  • the computer program product includes one or more computer programs or instructions.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, a base station, a user equipment, or other programmable device.
  • the computer program or instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another.
  • the computer program or instructions may be transmitted from a website, computer, A server or data center transmits via wired or wireless means to another website site, computer, server, or data center.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or data center that integrates one or more available media.
  • the available media may be magnetic media, such as floppy disks, hard disks, and tapes; optical media, such as digital video optical disks; or semiconductor media, such as solid-state hard drives.
  • the computer-readable storage medium may be volatile or nonvolatile storage media, or may include both volatile and nonvolatile types of storage media.
  • “at least one” refers to one or more, and “plurality” refers to two or more.
  • “And/or” describes the association of associated objects, indicating that there can be three relationships, for example, A and/or B, which can mean: A exists alone, A and B exist simultaneously, and B exists alone, where A, B can be singular or plural.
  • the character “/” generally indicates that the related objects before and after are an “or” relationship; in the formula of this application, the character “/” indicates that the related objects before and after are a kind of "division” Relationship.

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Abstract

本申请一种提供通信方法、通信装置及通信系统。该方法中，用户面网元确定与应用的业务数据匹配的包检测规则；用户面网元对业务数据执行与包检测规则关联的转发动作规则对应的转发策略，转发策略用于该业务数据执行局域网业务流导向，以及对经过部署在局域网的业务功能网元处理后的业务数据执行数据网络路由业务流导向以将处理后的业务数据发送至本地数据网络。该方案，用户面网元确定的转发策略可以先对业务数据执行局域网业务流导向，提升业务数据的传输质量和传输带宽，然后再对经过部署在局域网的业务功能网元处理后的业务数据执行数据网络路由业务流导向，实现用户就近访问本地数据网络中的应用，从而可以提升用户体验。

Description

通信方法、通信装置及通信系统
相关申请的交叉引用
本申请要求在2022年03月29日提交中国专利局、申请号为202210322384.3、申请名称为“通信方法、通信装置及通信系统”的中国专利申请的优先权，其全部内容通过引用结合在本申请中；本申请要求在2022年05月05日提交中国专利局、申请号为202210482211.8、申请名称为“通信方法、通信装置及通信系统”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
本申请涉及无线通信技术领域，尤其涉及通信方法、通信装置及通信系统。
背景技术
随着互联网技术的发展和智能终端的能力提升，智能终端支持的应用越来越多，用户使用智能终端访问应用服务器中的应用的频率也越来越高，因此用户对于访问应用时的业务体验的要求也越来越高。
如何持续提升用户访问应用时的业务体验，有待解决。
发明内容
本申请提供通信方法、通信装置及通信系统，用以提升用户访问应用时的业务体验。
第一方面，本申请实施例提供一种通信方法，该方法可以由用户面网元或应用于用户面网元中的模块(如芯片)来执行。以用户面网元执行该方法为例，用户面网元确定与应用的业务数据匹配的包检测规则；该用户面网元对该业务数据执行与该包检测规则关联的转发动作规则对应的转发策略，该转发策略用于对该业务数据执行局域网业务流导向，以及对经过部署在局域网的业务功能网元处理后的业务数据执行数据网络路由业务流导向以将该处理后的业务数据发送至本地数据网络。
上述方案，用户面网元确定的转发策略，可以先对业务数据执行局域网业务流导向，提升业务数据的传输质量和传输带宽，然后再对经过部署在局域网的业务功能网元处理后的业务数据执行数据网络路由业务流导向，以将处理后的业务数据发送至本地数据网络，从而实现用户就近访问本地数据网络中的应用。该方案一方面提升业务数据的传输质量和传输带宽，另一方面实现用户就近访问本地数据包中的应用，从而提升业务数据的传输性能，可以提升用户体验。
一种可能的实现方法中，该转发动作规则包括转发策略标识，该转发策略标识是根据该应用的局域网业务流导向策略标识和该应用的数据网络路由业务流导向策略标识确定的；其中，该应用的局域网业务流导向策略标识用于对该业务数据执行局域网业务流导向，该应用的数据网络路由业务流导向策略标识用于对该业务数据执行数据网络路由业务流导向，该应用的数据网络路由业务流导向策略标识与该本地数据网络的数据网络接入标识 DNAI对应。
上述方案，一个转发策略标识既能够指示局域网业务流导向策略，还能够指示数据网络路由业务流导向策略，从而用户面网元只需要根据该一个转发策略标识即可确定用于指示局域网业务流导向策略和数据网络路由业务流导向策略的转发策略，简化了用户面网元的操作，减少了用户面的复杂度，可以提升用户面网元的性能。
一种可能的实现方法中，该用户面网元根据该转发策略标识，获取该转发策略。
一种可能的实现方法中，该转发动作规则包括转发策略标识和数据网络路由信息，该转发策略标识是根据该应用的局域网业务流导向策略标识确定的；其中，该应用的局域网业务流导向策略标识用于对该业务数据执行局域网业务流导向，该数据网络路由信息用于对该业务数据执行数据网络路由业务流导向，该数据网络路由信息包括该应用的服务器的地址、端口号或协议号中的至少一个，该数据网络路由信息与该本地数据网络的DNAI对应。
上述方案，用户面网元根据转发策略标识和数据网络路由信息确定转发策略，从而提升确定的转发策略的准确性，提升业务数据处理的速度和正确性，有助于提升用户体验。
一种可能的实现方法中，该转发动作规则包括转发策略标识和数据网络路由信息，该转发策略标识是根据该应用的局域网业务流导向策略标识和该应用的数据网络路由业务流导向策略标识确定的；其中，该应用的局域网业务流导向策略标识用于对该业务数据执行局域网业务流导向，该应用的数据网络路由业务流导向策略标识和该数据网络路由信息均用于对该业务数据执行数据网络路由业务流导向，该应用的数据网络路由业务流导向策略标识和该数据网络路由信息均与该本地数据网络的DNAI对应，该数据网络路由信息包括该应用的服务器的地址、端口号或协议号中的至少一个。
上述方案，一个转发策略标识既能够指示局域网业务流导向策略，还能够指示数据网络路由业务流导向策略，从而用户面网元只需要根据该一个转发策略标识即可确定用于指示局域网业务流导向策略和数据网络路由业务流导向策略的转发策略，简化了用户面网元的操作，减少了用户面的复杂度，可以提升用户面网元的性能。并且，用户面网元也可以根据转发策略标识和数据网络路由信息确定转发策略，从而提升确定的转发策略的准确性，提升业务数据处理的速度和正确性，有助于提升用户体验。
一种可能的实现方法中，该用户面网元根据该转发策略标识和该数据网络路由信息，获取该转发策略。
第二方面，本申请实施例提供一种通信方法，该方法可以由会话管理网元或应用于会话管理网元中的模块(如芯片)来执行。以会话管理网元执行该方法为例，会话管理网元接收PCC规则，该PCC规则包括应用的局域网业务流导向策略标识和数据网络路由控制信息，该数据网络路由控制信息包括至少一个数据网络接入标识DNAI以及该至少一个DNAI分别对应的数据网络路由业务流导向策略标识和/或数据网络路由信息，该局域网业务流导向策略标识用于对该应用的业务数据执行局域网业务流导向，该数据网络路由业务流导向策略标识和该数据网络路由信息均用于对该应用的业务数据执行数据网络路由业务流导向，该数据网络路由信息包括该应用的服务器的地址、端口号或协议号中的至少一个；该会话管理网元根据该局域网业务流导向策略标识和该数据网络路由控制信息，确定转发动作规则；该会话管理网元向用户面网元发送该转发动作规则。
上述方案，会话管理网元向用户面网元发送的转发动作规则，可用于指示用户面网元 先对业务数据执行局域网业务流导向，然后对处理后的业务数据执行数据网络路由业务流导向，以实现用户就近访问本地数据网络中的应用。该方案一方面提升业务数据的传输质量和传输带宽，另一方面实现用户就近访问本地数据包中的应用，从而提升业务数据的传输性能，可以提升用户体验。
一种可能的实现方法中，该会话管理网元根据该局域网业务流导向策略标识和该数据网络路由控制信息，确定转发动作规则，包括：该会话管理网元确定该至少一个DNAI中的目标DNAI，该用户面网元对应该目标DNAI；该会话管理网元根据该局域网业务流导向策略标识和该目标DNAI对应的数据网络路由业务流导向策略标识，确定转发策略标识；其中，该转发动作规则包括该转发策略标识。可选的，该转发策略标识包括第一策略标识和第二策略标识，其中，会话管理网元根据局域网业务流导向策略标识确定该第一策略标识，以及根据目标DNAI对应的数据网络路由业务流导向策略标识，确定第二策略标识，可选的，该第一策略标识的优先级高于第二策略标识的优先级。因此用户面网元根据第一策略标识和第二策略标识确定转发策略。
一种可能的实现方法中，该转发动作规则还包括该目标DNAI对应的数据网络路由信息。可选的，该转发策略标识包括第一策略标识和第二策略标识，其中，会话管理网元根据局域网业务流导向策略标识确定该第一策略标识，以及根据目标DNAI对应的数据网络路由业务流导向策略标识，确定第二策略标识，可选的，该第一策略标识的优先级高于第二策略标识的优先级，该第一策略标识的优先级高于目标DNAI对应的数据网络路由信息的优先级。因此用户面网元根据第一策略标识和第二策略标识确定转发策略，或者用户面网元根据第一策略标识、第二策略标识以及目标DNAI对应的数据网络路由信息确定转发策略。
一种可能的实现方法中，该会话管理网元根据该局域网业务流导向策略标识和该数据网络路由控制信息，确定转发动作规则，包括：该会话管理网元确定该至少一个DNAI中的目标DNAI，该用户面网元对应该目标DNAI；该会话管理网元根据该局域网业务流导向策略标识，确定转发策略标识；其中，该转发动作规则包括该转发策略标识和该目标DNAI对应的数据网络路由信息。可选的，转发策略标识的优先级高于目标DNAI对应的数据网络路由信息的优先级。因此用户面网元根据转发策略标识和目标DNAI对应的数据网络路由信息确定转发策略。
第三方面，本申请实施例提供一种通信方法，该方法可以由会话管理网元或应用于会话管理网元中的模块(如芯片)来执行。以会话管理网元执行该方法为例，会话管理网元接收PCC规则，该PCC规则包括数据网络路由控制信息和至少两个数据网络接入标识DNAI分别对应的局域网业务流导向策略标识，该数据网络路由控制信息包括该至少两个DNAI以及该至少两个DNAI分别对应的数据网络路由业务流导向策略标识和/或数据网络路由信息，该局域网业务流导向策略标识用于对应用的业务数据执行局域网业务流导向，该数据网络路由业务流导向策略标识和该数据网络路由信息均用于对该应用的业务数据执行数据网络路由业务流导向，该数据网络路由信息包括该应用的服务器的地址、端口号或协议号中的至少一个；该会话管理网元根据该数据网络路由控制信息和该至少两个DNAI分别对应的局域网业务流导向策略标识，确定转发动作规则；该会话管理网元向用户面网元发送该转发动作规则。
上述方案，会话管理网元向用户面网元发送的转发动作规则，可用于指示用户面网元 先对业务数据执行局域网业务流导向，然后对处理后的业务数据执行数据网络路由业务流导向，以实现用户就近访问本地数据网络中的应用。该方案一方面提升业务数据的传输质量和传输带宽，另一方面实现用户就近访问本地数据包中的应用，从而提升业务数据的传输性能，可以提升用户体验。
一种可能的实现方法中，该会话管理网元根据该数据网络路由控制信息和该至少两个DNAI分别对应的局域网业务流导向策略标识，确定转发动作规则，包括：该会话管理网元确定该至少两个DNAI中的目标DNAI，该用户面网元对应该目标DNAI；该会话管理网元根据该目标DNAI对应的局域网业务流导向策略标识和该目标DNAI对应的数据网络路由业务流导向策略标识，确定转发策略标识；其中，该转发动作规则包括该转发策略标识。可选的，该转发策略标识包括第一策略标识和第二策略标识，其中，会话管理网元根据该目标DNAI对应的局域网业务流导向策略标识确定该第一策略标识，以及根据目标DNAI对应的数据网络路由业务流导向策略标识，确定第二策略标识，可选的，该第一策略标识的优先级高于第二策略标识的优先级。因此用户面网元根据第一策略标识和第二策略标识确定转发策略。
一种可能的实现方法中，该转发动作规则还包括该目标DNAI对应的数据网络路由信息。可选的，该转发策略标识包括第一策略标识和第二策略标识，其中，会话管理网元根据该目标DNAI对应的局域网业务流导向策略标识确定该第一策略标识，以及根据目标DNAI对应的数据网络路由业务流导向策略标识，确定第二策略标识，可选的，该第一策略标识的优先级高于第二策略标识的优先级，该第一策略标识的优先级高于目标DNAI对应的数据网络路由信息的优先级。因此用户面网元根据第一策略标识和第二策略标识确定转发策略，或者用户面网元根据第一策略标识、第二策略标识以及目标DNAI对应的数据网络路由信息确定转发策略。
一种可能的实现方法中，该会话管理网元根据该数据网络路由控制信息和该至少两个DNAI分别对应的局域网业务流导向策略标识，确定转发动作规则，包括：该会话管理网元确定该至少两个DNAI中的目标DNAI，该用户面网元对应该目标DNAI；该会话管理网元根据该目标DNAI对应的局域网业务流导向策略标识，确定转发策略标识；其中，该转发动作规则包括该转发策略标识和该目标DNAI对应的数据网络路由信息。可选的，转发策略标识的优先级高于目标DNAI对应的数据网络路由信息的优先级。因此用户面网元根据转发策略标识和目标DNAI对应的数据网络路由信息确定转发策略。
第四方面，本申请实施例提供一种通信方法，该方法可以由策略控制网元或应用于策略控制网元中的模块(如芯片)来执行。以策略控制网元执行该方法为例，策略控制网元接收业务链标识、至少一个DNAI以及该至少一个DNAI分别对应的配置标识，该业务链标识指示一个业务链，该业务链用于对应用的业务数据执行业务链处理，该配置标识用于对该应用的业务数据执行数据网络路由业务流导向；该策略控制网元根据该业务链标识和该至少一个DNAI分别对应的配置标识，确定该至少一个DNAI分别对应的业务流导向策略标识，该业务流导向策略标识用于对该应用的业务数据执行局域网业务流导向和对该应用的业务数据执行数据网络路由业务流导向；该策略控制网元向会话管理网元发送该PCC规则，该PCC规则包括该至少一个DNAI以及该至少一个DNAI分别对应的业务流导向策略标识。可选的，该至少一个DNAI分别对应的配置标识与该至少一个DNAI分别对应的业务流导向策略标识一一对应。
上述方案，策略控制网元向会话管理网元发送PCC规则，会话管理网元可根据该PCC规则向用户面网元指示先对业务数据执行局域网业务流导向，然后对处理后的业务数据执行数据网络路由业务流导向，以实现用户就近访问本地数据网络中的应用。该方案一方面提升业务数据的传输质量和传输带宽，另一方面实现用户就近访问本地数据包中的应用，从而提升业务数据的传输性能，可以提升用户体验。
一种可能的实现方法中，该策略控制网元接收该至少一个DNAI分别对应的数据网络路由信息，该数据网络路由信息用于对该应用的业务数据执行数据网络路由业务流导向，该数据网络路由信息包括该应用的服务器的地址、端口号或协议号中的至少一个；该PCC规则还包括该至少一个DNAI分别对应的数据网络路由信息。
第五方面，本申请实施例提供一种通信方法，该方法可以由策略控制网元或应用于策略控制网元中的模块(如芯片)来执行。以策略控制网元执行该方法为例，策略控制网元接收至少两个DNAI，该至少两个DNAI分别对应的配置标识和该至少两个DNAI分别对应的业务链标识，该业务链标识指示一个业务链，该业务链用于对应用的业务数据执行业务链处理，该配置标识用于对该应用的业务数据执行数据网络路由业务流导向；该策略控制网元根据该至少两个DNAI分别对应的业务链标识和该至少两个DNAI分别对应的配置标识，确定该至少两个DNAI分别对应的业务流导向策略标识，该业务流导向策略标识用于对该应用的业务数据执行局域网业务流导向和对该应用的业务数据执行数据网络路由业务流导向；该策略控制网元向会话管理网元发送该PCC规则，该PCC规则包括该至少两个DNAI以及该至少两个DNAI分别对应的业务流导向策略标识。可选的，该至少两个DNAI分别对应的配置标识和业务链标识均与该至少两个DNAI分别对应的业务流导向策略标识一一对应。
上述方案，策略控制网元向会话管理网元发送PCC规则，会话管理网元可根据该PCC规则向用户面网元指示先对业务数据执行局域网业务流导向，然后对处理后的业务数据执行数据网络路由业务流导向，以实现用户就近访问本地数据网络中的应用。该方案一方面提升业务数据的传输质量和传输带宽，另一方面实现用户就近访问本地数据包中的应用，从而提升业务数据的传输性能，可以提升用户体验。
一种可能的实现方法中，该策略控制网元接收该至少两个DNAI分别对应的数据网络路由信息，该数据网络路由信息用于对该应用的业务数据执行数据网络路由业务流导向，该数据网路由信息包括该应用的服务器的地址、端口号或协议号中的至少一个；该PCC规则还包括该至少两个DNAI分别对应的数据网络路由信息。
第六方面，本申请实施例提供一种通信方法，该方法可以由用户面网元或应用于用户面网元中的模块(如芯片)来执行。以用户面网元执行该方法为例，用户面网元确定与应用的业务数据匹配的第一包检测规则；该用户面网元对该业务数据执行与该第一包检测规则关联的第一转发动作规则对应的第一转发策略，该第一转发策略用于对该业务数据执行局域网业务流导向；该用户面网元确定与经过部署在局域网的业务功能网元处理后的业务数据匹配的第二包检测规则；该用户面网元对该处理后的业务数据执行与该第二包检测规则关联的第二转发动作规则对应的第二转发策略，该第二转发策略用于对该处理后的业务数据执行数据网络路由业务流导向以将该处理后的业务数据发送至本地数据网络。
上述方案，用户面网元确定的第一转发策略，可以对业务数据执行局域网业务流导向，提升业务数据的传输质量和传输带宽。用户面网元确定的第二转发策略可以对经过部署在 局域网的业务功能网元处理后的业务数据执行数据网络路由业务流导向，以将处理后的业务数据发送至本地数据网络，从而实现用户就近访问本地数据网络中的应用。该方案一方面提升业务数据的传输质量和传输带宽，另一方面实现用户就近访问本地数据包中的应用，从而提升业务数据的传输性能，从而可以提升用户体验。
一种可能的实现方法中，该第一转发动作规则包括第一策略标识，该第一策略标识是根据该应用的局域网业务流导向策略标识确定的；其中，该应用的局域网业务流导向策略标识用于对该业务数据执行局域网业务流导向。
上述方案，通过第一转发动作规则中的第一策略标识，指示第一转发策略，用户面网元可以根据该第一策略标识获取第一转发策略，有助于实现准确获取转发策略，从而实现业务数据的正确传输，有助于提升业务数据的传输性能以及提升用户体验。
一种可能的实现方法中，该用户面网元根据该第一策略标识，获取该第一转发策略。
一种可能的实现方法中，该第二转发动作规则包括第二策略标识和/或数据网络路由信息，该第二策略标识是根据该应用的数据网络路由业务流导向策略标识确定的，该应用的数据网络路由业务流导向策略标识用于对该业务数据执行数据网络路由业务流导向，该数据网络路由信息用于对该业务数据执行数据网络路由业务流导向，该数据网络路由信息包括该应用的服务器的地址、端口号或协议号中的至少一个，该应用的数据网络路由业务流导向策略标识、该数据网络路由信息均与该本地数据网络的数据网络接入标识DNAI对应。
上述方案，通过第二转发动作规则中的第二策略标识，指示第二转发策略，用户面网元可以根据该第二策略标识获取第二转发策略，有助于实现准确获取转发策略，从而实现业务数据的正确传输，有助于提升业务数据的传输性能以及提升用户体验。
一种可能的实现方法中，该用户面网元根据该第二策略标识和/或该数据网络路由信息，获取该第二转发策略。
第七方面，本申请实施例提供一种通信方法，该方法可以由会话管理网元或应用于会话管理网元中的模块(如芯片)来执行。以会话管理网元执行该方法为例，会话管理网元接收PCC规则，该PCC规则包括应用的局域网业务流导向策略标识和数据网络路由控制信息，该数据网络路由控制信息包括至少一个数据网络接入标识DNAI以及该至少一个DNAI分别对应的数据网络路由业务流导向策略标识和/或数据网络路由信息，该局域网业务流导向策略标识用于对该应用的业务数据执行局域网业务流导向，该数据网络路由业务流导向策略标识和该数据网络路由信息均用于对该应用的业务数据执行数据网络路由业务流导向，该数据网络路由信息包括该应用的服务器的地址、端口号或协议号中的至少一个；该会话管理网元根据该局域网业务流导向策略标识，确定第一转发动作规则；该会话管理网元根据该数据网络路由控制信息，确定第二转发动作规则；该会话管理网元向用户面网元发送该第一转发动作规则和该第二转发动作规则。
上述方案，会话管理网元向用户面网元发送的第一转发动作规则用于用户面网元先对业务数据执行局域网业务流导向，会话管理网元向用户面网元发送的第二转发动作规则用于用户面网元对处理后的业务数据执行数据网络路由业务流导向，以实现用户就近访问本地数据网络中的应用。该方案一方面提升业务数据的传输质量和传输带宽，另一方面实现用户就近访问本地数据包中的应用，从而提升业务数据的传输性能，可以提升用户体验。
一种可能的实现方法中，该会话管理网元根据该局域网业务流导向策略标识，确定第一转发动作规则，包括：该会话管理网元根据该局域网业务流导向策略标识，确定第一策 略标识，该第一策略标识用于指示第一转发策略；其中，该第一转发动作规则包括该第一策略标识。
上述方案，通过第一转发动作规则中的第一策略标识，指示第一转发策略，用户面网元可以根据该第一策略标识获取第一转发策略，有助于实现准确获取转发策略，从而实现业务数据的正确传输，有助于提升业务数据的传输性能以及提升用户体验。
一种可能的实现方法中，该数据网络路由控制信息包括至少一个DNAI以及该至少一个DNAI分别对应的数据网络路由业务流导向策略标识；该会话管理网元根据该数据网络路由控制信息，确定第二转发动作规则，包括：该会话管理网元确定该至少一个DNAI中的目标DNAI，该用户面网元对应该目标DNAI；该会话管理网元根据该目标DNAI对应的数据网络路由业务流导向策略标识，确定第二策略标识，该第二策略标识用于指示第二转发策略；其中，该第二转发动作规则包括该第二策略标识。
上述方案，通过第二转发动作规则中的第二策略标识，指示第二转发策略，用户面网元可以根据该第二策略标识获取第二转发策略，有助于实现准确获取转发策略，从而实现业务数据的正确传输，有助于提升业务数据的传输性能以及提升用户体验。
一种可能的实现方法中，该数据网络路由控制信息包括至少一个数据网络接入标识DNAI以及该至少一个DNAI分别对应的数据网络路由信息；该会话管理网元根据该数据网络路由控制信息，确定第二转发动作规则，包括：该会话管理网元确定该至少一个DNAI中的目标DNAI，该用户面网元对应该目标DNAI；其中，该第二转发动作规则包括该目标DNAI对应的数据网络路由信息，该目标DNAI对应的数据网络路由信息用于指示第二转发策略。
上述方案，通过第二转发动作规则中的数据网络路由信息，指示第二转发策略，用户面网元可以根据该数据网络路由信息获取第二转发策略，有助于实现准确获取转发策略，从而实现业务数据的正确传输，有助于提升业务数据的传输性能以及提升用户体验。
一种可能的实现方法中，该数据网络路由控制信息包括至少一个数据网络接入标识DNAI以及该至少一个DNAI分别对应的数据网络路由业务流导向策略标识和数据网络路由信息；该会话管理网元根据该数据网络路由控制信息，确定第二转发动作规则，包括：该会话管理网元确定该至少一个DNAI中的目标DNAI，该用户面网元对应该目标DNAI；该会话管理网元根据该目标DNAI对应的数据网络路由业务流导向策略标识，确定第二策略标识；其中，该第二转发动作规则包括该第二策略标识和该目标DNAI对应的数据网络路由信息，该第二策略标识和该目标DNAI对应的数据网络路由信息用于指示第二转发策略。
上述方案，通过第二转发动作规则中的第二策略标识和数据网络路由信息，指示第二转发策略，用户面网元可以根据第二策略标识和数据网络路由信息获取第二转发策略，有助于实现准确获取转发策略，从而实现业务数据的正确传输，有助于提升业务数据的传输性能以及提升用户体验。
第八方面，本申请实施例提供一种通信方法，该方法可以由会话管理网元或应用于会话管理网元中的模块(如芯片)来执行。以会话管理网元执行该方法为例，会话管理网元接收PCC规则，该PCC规则包括数据网络路由控制信息和至少两个数据网络接入标识DNAI分别对应的局域网业务流导向策略标识，该数据网络路由控制信息包括该至少两个DNAI以及该至少两个DNAI分别对应的数据网络路由业务流导向策略标识和/或数据网络 路由信息，该局域网业务流导向策略标识用于对应用的业务数据执行局域网业务流导向，该数据网络路由业务流导向策略标识和该数据网络路由信息均用于对该应用的业务数据执行数据网络路由业务流导向，该数据网络路由信息包括该应用的服务器的地址、端口号或协议号中的至少一个；该会话管理网元根据该至少两个DNAI分别对应的局域网业务流导向策略标识，确定第一转发动作规则；该会话管理网元根据该数据网络路由控制信息，确定第二转发动作规则；该会话管理网元向用户面网元发送该第一转发动作规则和该第二转发动作规则。
上述方案，会话管理网元向用户面网元发送的第一转发动作规则用于用户面网元先对业务数据执行局域网业务流导向，会话管理网元向用户面网元发送的第二转发动作规则用于用户面网元对处理后的业务数据执行数据网络路由业务流导向，以实现用户就近访问本地数据网络中的应用。该方案一方面提升业务数据的传输质量和传输带宽，另一方面实现用户就近访问本地数据包中的应用，从而提升业务数据的传输性能，可以提升用户体验。并且，该方案可以提供多个局域网业务流导向策略标识，并从多个局域网业务流导向策略标识选择使用的局域网业务流导向策略标识，有助于提升转发策略的准确性，进而提升业务数据发送速度和准确性，进一步提升用户体验。
一种可能的实现方法中，该会话管理网元根据该至少两个DNAI分别对应的局域网业务流导向策略标识，确定第一转发动作规则，包括：该会话管理网元确定该至少两个DNAI中的目标DNAI，该用户面网元对应该目标DNAI；该会话管理网元根据该目标DNAI对应的局域网业务流导向策略标识，确定第一策略标识，该第一策略标识用于指示第一转发策略；其中，该第一转发动作规则包括该第一策略标识。
上述方案，通过第一转发动作规则中的第一策略标识，指示第一转发策略，用户面网元可以根据该第一策略标识获取第一转发策略，有助于实现准确获取转发策略，从而实现业务数据的正确传输，有助于提升业务数据的传输性能以及提升用户体验。
一种可能的实现方法中，该数据网络路由控制信息包括至少一个DNAI以及该至少一个DNAI分别对应的数据网络路由业务流导向策略标识；该会话管理网元根据该数据网络路由控制信息，确定第二转发动作规则，包括：该会话管理网元确定该至少一个DNAI中的目标DNAI，该用户面网元对应该目标DNAI；该会话管理网元根据该目标DNAI对应的数据网络路由业务流导向策略标识，确定第二策略标识，该第二策略标识用于指示第二转发策略；其中，该第二转发动作规则包括该第二策略标识。
上述方案，通过第二转发动作规则中的第二策略标识，指示第二转发策略，用户面网元可以根据该第二策略标识获取第二转发策略，有助于实现准确获取转发策略，从而实现业务数据的正确传输，有助于提升业务数据的传输性能以及提升用户体验。
一种可能的实现方法中，该数据网络路由控制信息包括至少一个数据网络接入标识DNAI以及该至少一个DNAI分别对应的数据网络路由信息；该会话管理网元根据该数据网络路由控制信息，确定第二转发动作规则，包括：该会话管理网元确定该至少一个DNAI中的目标DNAI，该用户面网元对应该目标DNAI；其中，该第二转发动作规则包括该目标DNAI对应的数据网络路由信息，该目标DNAI对应的数据网络路由信息用于指示第二转发策略。
上述方案，通过第二转发动作规则中的数据网络路由信息，指示第二转发策略，用户面网元可以根据该数据网络路由信息获取第二转发策略，有助于实现准确获取转发策略， 从而实现业务数据的正确传输，有助于提升业务数据的传输性能以及提升用户体验。
一种可能的实现方法中，该数据网络路由控制信息包括至少一个数据网络接入标识DNAI以及该至少一个DNAI分别对应的数据网络路由业务流导向策略标识和数据网络路由信息；该会话管理网元根据该数据网络路由控制信息，确定第二转发动作规则，包括：该会话管理网元确定该至少一个DNAI中的目标DNAI，该用户面网元对应该目标DNAI；该会话管理网元根据该目标DNAI对应的数据网络路由业务流导向策略标识，确定第二策略标识；其中，该第二转发动作规则包括该第二策略标识和该目标DNAI对应的数据网络路由信息，该第二策略标识和该目标DNAI对应的数据网络路由信息用于指示第二转发策略。
上述方案，通过第二转发动作规则中的第二策略标识和数据网络路由信息，指示第二转发策略，用户面网元可以根据第二策略标识和数据网络路由信息获取第二转发策略，有助于实现准确获取转发策略，从而实现业务数据的正确传输，有助于提升业务数据的传输性能以及提升用户体验。
第九方面，本申请实施例提供一种通信装置，该装置可以是用户面网元，还可以是用于用户面网元的芯片。该装置具有实现上述第一方面或第六方面的任意实现方法的功能。该功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。该硬件或软件包括一个或多个与上述功能相对应的模块。
第十方面，本申请实施例提供一种通信装置，该装置可以是会话管理网元，还可以是用于会话管理网元的芯片。该装置具有实现上述第二方面、第三方面、第七方面或第八方面的任意实现方法的功能。该功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。该硬件或软件包括一个或多个与上述功能相对应的模块。
第十一方面，本申请实施例提供一种通信装置，该装置可以是策略控制网元，还可以是用于策略控制网元的芯片。该装置具有实现上述第四方面或第五方面的任意实现方法的功能。该功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。该硬件或软件包括一个或多个与上述功能相对应的模块。
第十二方面，本申请实施例提供一种通信装置，包括用于执行上述第一方面至第八方面中的任意实现方法的各个步骤的单元或手段(means)。
第十三方面，本申请实施例提供一种通信装置，包括处理器和接口电路，所述处理器用于通过接口电路与其它装置通信，并执行上述第一方面至第八方面中的任意实现方法。该处理器包括一个或多个。
第十四方面，本申请实施例提供一种通信装置，包括与存储器耦合的处理器，该处理器用于调用所述存储器中存储的程序，以执行上述第一方面至第八方面中的任意实现方法。该存储器可以位于该装置之内，也可以位于该装置之外。且该处理器可以是一个或多个。
第十五方面，本申请实施例提供一种通信装置，包括处理器和存储器；该存储器用于存储计算机指令，当该装置运行时，该处理器执行该存储器存储的计算机指令，以使该装置执行上述第一方面至第八方面中的任意实现方法。
第十六方面，本申请实施例还提供一种计算机可读存储介质，所述计算机可读存储介质中存储有指令，当其在通信装置上运行时，使得上述第一方面至第八方面中的任意实现方法被执行。
第十七方面，本申请实施例还提供一种计算机程序产品，该计算机程序产品包括计算 机程序或指令，当计算机程序或指令被通信装置运行时，使得上述第一方面至第八方面中的任意实现方法被执行。
第十八方面，本申请实施例还提供一种芯片系统，包括：处理器，用于执行上述第一方面至第八方面中的任意实现方法。
第十九方面，本申请实施例还提供了一种通信系统，该通信系统包括用户面网元和会话管理网元。该用户面网元，用于从该会话管理网元接收转发动作规则。该会话管理网元，用于执行第二方面的任意实现方法。
第二十方面，本申请实施例还提供了一种通信系统，该通信系统包括用户面网元和会话管理网元。该用户面网元，用于从该会话管理网元接收转发动作规则。该会话管理网元，用于执行第三方面的任意实现方法。
第二十一方面，本申请实施例还提供了一种通信系统，该通信系统包括会话管理网元和策略控制网元。该会话管理网元，用于从该策略控制网元接收PCC规则。该策略控制网元，用于执行第四方面的任意实现方法。
第二十二方面，本申请实施例还提供了一种通信系统，该通信系统包括会话管理网元和策略控制网元。该会话管理网元，用于从该策略控制网元接收PCC规则。该策略控制网元，用于执行第五方面的任意实现方法。
第二十三方面，本申请实施例还提供了一种通信系统，该通信系统包括用户面网元和会话管理网元。该用户面网元，用于从该会话管理网元接收第一转发动作规则和第二转发动作规则。该会话管理网元，用于执行第七方面的任意实现方法。
第二十四方面，本申请实施例还提供了一种通信系统，该通信系统包括用户面网元和会话管理网元。该用户面网元，用于从该会话管理网元接收第一转发动作规则和第二转发动作规则。该会话管理网元，用于执行第八方面的任意实现方法。
附图说明
图1为基于服务化架构的5G网络架构示意图；
图2为本申请实施例提供的通信方法的流程示意图；
图3为本申请实施例提供的业务数据处理过程的示意图；
图4(a)为本申请实施例提供的通信方法的流程示意图；
图4(b)为本申请实施例提供的通信方法的流程示意图；
图5(a)为本申请实施例提供的通信方法的流程示意图；
图5(b)为本申请实施例提供的通信方法的流程示意图；
图6为本申请实施例提供的通信方法的流程示意图；
图7为本申请实施例提供的通信方法的流程示意图；
图8为本申请实施例提供的通信方法的流程示意图；
图9为本申请实施例提供的通信方法的流程示意图；
图10为本申请实施例提供的通信方法的流程示意图；
图11为本申请实施例提供的通信方法的流程示意图；
图12为本申请实施例提供的通信方法的流程示意图；
图13(a)为本申请实施例提供的通信方法的流程示意图；
图13(b)为本申请实施例提供的通信方法的流程示意图；
图14为本申请实施例提供的通信方法的流程示意图；
图15为本申请实施例提供的通信方法的流程示意图；
图16为本申请实施例提供的通信方法的流程示意图；
图17为本申请实施例提供的一种通信装置示意图；
图18为本申请实施例提供的一种通信装置示意图。
具体实施方式
图1为基于服务化架构的5G网络架构示意图。图1所示的5G网络架构中可包括终端设备、接入网以及核心网。终端设备通过接入网和核心网接入数据网络(data network，DN)。
终端设备可以是用户设备(user equipment，UE)、移动台、移动终端等。图1中以终端设备是UE为例。终端设备可以广泛应用于各种场景，例如，设备到设备(device-to-device，D2D)、车物(vehicle to everything，V2X)通信、机器类通信(machine-type communication，MTC)、物联网(internet of things，IOT)、虚拟现实、增强现实、工业控制、自动驾驶、远程医疗、智能电网、智能家具、智能办公、智能穿戴、智能交通、智慧城市等。终端设备可以是手机、平板电脑、带无线收发功能的电脑、可穿戴设备、车辆、城市空中交通工具(如无人驾驶机、直升机等)、轮船、机器人、机械臂、智能家居设备等。以下以UE作为终端设备的一个示例进行说明，后续任意地方出现的UE也可以替换为终端设备或终端设备的其它示例。
接入网用于实现接入有关的功能，可以为特定区域的授权用户提供入网功能，并能够根据用户的级别，业务的需求等确定不同质量的传输链路以传输用户数据。接入网在UE与核心网之间转发控制信号和用户数据。接入网可以包括接入网设备，接入网设备可以是为UE提供接入的设备，可以包括无线接入网(radio access network，RAN)设备和有线接入网设备。RAN设备，主要负责空口侧的无线资源管理、服务质量(quality of service，QoS)管理、数据压缩和加密等功能。RAN设备可以包括各种形式的基站，例如宏基站，微基站(也可称为小站)，中继站，接入点，气球站等。在采用不同的无线接入技术的系统中，具备基站功能的设备的名称可能会有所不同，例如，在5G系统中，称为RAN或者下一代基站(next-generation Node basestation，gNB)，在长期演进(long term evolution，LTE)系统中，称为演进的节点B(evolved NodeB，eNB或eNodeB)。
接入网设备和UE可以是固定位置的，也可以是可移动的。接入网设备和UE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；还可以部署在空中的飞机、气球和人造卫星上。本申请的实施例对接入网设备和UE的应用场景不做限定。
核心网负责维护移动网络的签约数据，为UE提供会话管理、移动性管理、策略管理以及安全认证等功能。核心网中包括但不限于以下一个或多个网元：应用功能(application function，AF)网元、统一数据管理(unified data management，UDM)网元、统一数据库(unified data repository，UDR)网元、策略控制功能(policy control function，PCF)网元、会话管理功能(session management function，SMF)网元、接入与移动性管理功能(access and mobility management function，AMF)网元、网络存储功能(network repository function，NRF)网元、鉴权服务器功能(authentication server function，AUSF)网元、网络开放功能(network exposure function，NEF)网元、用户面功能(user plane function，UPF)网元。
AMF网元，主要负责移动网络中的移动性管理，例如用户位置更新、用户注册网络、 用户切换等。
SMF网元，主要负责移动网络中的会话管理，例如会话建立、修改、释放。具体功能例如为用户分配互联网协议(internet protocol，IP)地址，选择提供报文转发功能的UPF等。
UPF网元，主要负责用户数据的转发和接收，可以从数据网络接收用户数据，通过接入网络设备传输给UE；还可以通过接入网设备从UE接收用户数据，转发至数据网络。
UDM网元，包含执行管理签约数据、用户接入授权等功能。
UDR网元，包含执行签约数据、策略数据、应用数据等类型数据的存取功能。
NEF网元，主要用于支持能力和事件的开放。
AF网元，传递应用侧对网络侧的需求，例如，QoS需求或用户状态事件订阅等。AF可以是第三方功能实体，也可以是运营商部署的应用服务，如IP多媒体子系统(IP Multimedia Subsystem，IMS)语音呼叫业务。
PCF网元，主要支持提供统一的策略框架来控制网络行为，提供策略规则给控制层网络功能，同时负责获取与策略决策相关的用户签约信息。PCF网元可以向AMF网元、SMF网元提供策略，例如QoS策略、切片选择策略等。
NRF网元，可用于提供网元发现功能，基于其它网元的请求，提供网元类型对应的网元信息。NRF还提供网元管理服务，如网元注册、更新、去注册以及网元状态订阅和推送等。
AUSF网元，负责对UE进行鉴权，验证UE的合法性。
DN，其上可部署多种业务，可为UE提供数据和/或语音等服务。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为UE，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。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为UE，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。本申请实施例中的DN包括本地数据网络(Local Data Network)。其中，本地数据网络可以向位于特定区域的用户提供业务数据以便优化访问路径，以及可以实现UE能够就近访问应用的业务数据。
其中，AF网元、UDM网元、UDR网元、PCF网元、SMF网元、AMF网元、NRF网元、AUSF网元、NEF网元、UPF网元，也可以分别简称为AF、UDM、UDR、PCF、SMF、AMF、NRF、AUSF、NEF、UPF。
图1中Nausf、Nnef、Nnrf、Namf、Npcf、Nsmf、Nudm、Nudr、Naf分别为上述AUSF、NEF、NRF、AMF、PCF、SMF、UDM、UDR、AF提供的服务化接口，用于调用相应的服务化操作。N1、N2、N3、N4以及N6为接口序列号，这些接口序列号的含义如下：
1)、N1：AMF与UE之间的接口，可以用于向UE传递非接入层(non access stratum，NAS)信令(如包括来自AMF的QoS规则)等。
2)、N2：AMF与接入网设备之间的接口，可以用于传递核心网侧至接入网设备的无线承载控制信息等。
3)、N3：接入网设备与UPF之间的接口，主要用于传递接入网设备与UPF间的上下行用户面数据。
4)、N4：SMF与UPF之间的接口，可以用于控制面与用户面之间传递信息，包括控 制面向用户面的转发规则、QoS规则、流量统计规则等的下发以及用户面的信息上报。
5)、N6：UPF与DN的接口，用于传递UPF与DN之间的上下行用户数据流。
可以理解的是，上述网元或者功能既可以是硬件设备中的网络元件，也可以是在专用硬件上运行软件功能，或者是平台(例如，云平台)上实例化的虚拟化功能。作为一种可能的实现方法，上述网元或者功能可以由一个设备实现，也可以由多个设备共同实现，还可以是一个设备内的一个功能模块，本申请实施例对此不作具体限定。
本申请实施例的方案可以应用于图1所示的5G网络架构，也可以应用于未来通信的网络架构，如第六代(the 6th generation，6G)网络中，本申请对此不限定。
本申请中的用户面网元、会话管理网元、策略控制网元分别可以是5G系统中的UPF网元、SMF网元、PCF网元，也可以是未来通信如6G网络中具有上述UPF网元、SMF网元、PCF网元的功能的网元，本申请对此不限定。在本申请的实施例中，以UPF网元、SMF网元、PCF网元分别为用户面网元、会话管理网元、策略控制网元的一个示例进行描述。并且，将UPF网元、SMF网元、PCF网元分别简称为UPF、SMF、PCF。
图2为本申请实施例提供的一种通信方法的流程示意图。该方法包括以下步骤：
步骤201，UPF确定与应用的业务数据匹配的包检测规则(Packet Detection Rule，PDR)。
UPF接收到应用的业务数据(比如上行业务数据)，然后UPF根据UPF上的多个PDR对该业务数据进行匹配，并确定一个PDR。
示例性的，PDR中包括到来的数据包的源接口(Source Interface of incoming packet)，以及还包括业务数据流过滤器(SDF Filter)或者应用标识，因此可以使用该PDR对数据包的包头中携带的信息进行匹配，以确定该数据包适用的PDR。业务数据流过滤器可以是五元组信息。到来的数据包的源接口的取值为Access(表示上行)。
其中，业务数据流过滤器或应用标识可以是SMF根据从PCF接收的PCC规则中的业务流模板确定的。这里做统一描述，后面不再赘述。
其中，到来的数据包的源接口，也可以称为接收的数据包的源接口，这里统一描述，后面不赘述。
步骤202，UPF对该业务数据执行与包检测规则关联的转发动作规则对应的转发策略。
本申请实施例中，转发策略也称为路由策略，发送策略或传输策略等，这里统一说明，后面不赘述。
每个PDR关联一个转发动作规则(Forwarding Action Rule，FAR)，因此UPF确定与业务数据匹配的PDR之后，可以确定与该PDR关联的FAR，然后确定与该FAR对应的转发策略。其中，UPF上预配置有多个转发策略，不同的FAR对应不同的转发策略。
作为一种实现方法，每个应用的数据流对应一个PDR或多个PDR(根据不同的到来的数据包的源接口等信息可以有不同的PDR)，每个PDR关联一个FAR，每个FAR对应一个转发策略。因此UPF针对不同应用的业务数据，执行不同的转发策略。
UPF上配置的转发策略是应用与网络之间预先协商的策略或是根据运营商的策略预先配置的，不同应用与网络之间协商的转发策略可以相同，也可以不同。
转发策略用于对应用的业务数据执行局域网业务流导向，以及对经过部署在局域网的业务功能网元处理后的业务数据执行数据网络路由业务流导向以将处理后的业务数据发送至本地数据网络，该本地数据网络是该应用的服务器所在的数据网络，因此将处理后的业务数据发送至本地数据网络，指的是将处理后的业务数据发送至本地数据网络中的该应 用的服务器。
UPF根据转发策略，可以有以下两种执行方式：
方式一：UPF根据转发策略，依次执行两个处理，分别为以下处理1和处理2。
处理1：UPF对该应用的业务数据执行局域网业务流导向。
UPF执行局域网业务流导向，指的是将该应用的业务数据导向到局域网中的业务功能(servicefunction)网元，由业务功能网元对该应用的业务数据进行业务链处理。其中，这里的导向指的是发送。
本申请实施例中，局域网业务流导向(local area network traffic steering)也称为N6局域网业务流导向(N6-LAN traffic steering)。
经过部署在局域网的业务功能网元处理之后，UPF得到处理后的业务数据，然后对该处理后的业务数据执行以下处理2。
处理2：UPF对处理后的业务数据执行数据网络路由业务流导向。
UPF对处理后的业务数据执行数据网络路由业务流导向，指的是UPF将处理后的业务数据发送至本地数据网络，具体的，UPF将处理后的业务数据导向到本地数据网络中的该应用的服务器。
方式二：UPF将该应用的业务数据执行局域网业务流导向后，该应用的业务数据导向到局域网中的业务功能网元处理后，部署在网络中的其它功能网元继续将处理后的业务数据导向到本地数据网络中的该应用的服务器，这要求UPF在将该应用的业务数据导向到局域网中的业务功能网元时，根据转发策略在业务数据中的数据包中添加用于执行数据网络路由业务流导向的信息，当其它功能网元(如业务功能网元对应的交换机)接收到经局域网中的业务功能网元处理后的业务数据时，根据用于执行数据网络路由业务流导向的信息将处理后的业务数据导向到本地数据网络中的该应用的服务器。或者，该应用的业务数据导向到局域网中的业务功能网元处理后，也可以根据业务数据的目的地址将处理后的业务数据导向到本地数据网络中的该应用的服务器，也即该方法不需要在业务数据中的数据包中添加用于执行数据网络路由业务流导向的信息。
本申请实施例中，数据网络路由业务流导向也称为本地数据网络路由业务流导向、本地路由业务流导向或AF影响的业务流导向(AF-influenced traffic steering)。
下面结合附图对上述两种处理进行说明。图3为本申请实施例提供的业务数据处理过程的示意图。执行局域网业务流导向，比如是UPF根据转发策略确定业务链信息，在业务数据的包头中添加业务链信息后将数据包发送到该业务链信息对应的业务链的交换机上，交换机根据业务数据中的业务链信息，从该交换机对应的多个业务功能网元中确定与该业务链信息对应的一个或多个业务功能网元，由该一个或多个业务功能网元对该业务数据执行相应的业务功能之后，由该交换机将处理后的业务数据发送至下一个交换机，然后由该下一个交换机继续选择一个或多个业务功能网元对该收到的业务数据执行相应的业务功能，以此类推，直到完成与该业务链信息对应的所有业务功能网元的处理之后，得到输出结果，该输出结果也称为经过部署在局域网的业务功能网元处理后的业务数据。示例性的，图3的示例中，UPF将收到业务数据a先发送到交换机1上，交换机1根据收到的业务数据a中的业务链信息，确定业务功能网元1，由该业务功能网元1对该业务数据a执行业务功能1后得到业务数据b，然后交换机1将业务数据b发送至业务链上的交换机2上，该交换机2根据收到的业务数据b中的业务链信息，确定业务功能网元3，由该业务功能 网元3对该业务数据b执行业务功能3后得到业务数据c，最终输出结果为业务数据c。
其中，这里对业务数据执行业务功能，比如可以是用于提升业务数据的传输带宽、传输质量。
在得到经过部署在局域网的业务功能网元处理后的业务数据(如上述业务数据c)之后，UPF或业务链上的交换机对该处理后的业务数据执行数据网络路由业务流导向，也即将该处理后的业务数据导向到本地数据网络，使得用户可以就近访问本地数据网络中的应用。
下面对数据网络路由业务流导向进行介绍。同一个应用的服务器可以部署在多个位置，这样网络就能够根据UE的接入位置，选择靠近UE同时又能支持UE访问本地数据网络的锚点UPF，以便减少路由迂回，降低网络延迟。在应用访问过程中，UE的接入位置发生移动，为减少路由迂回，锚点UPF需要进行重选，以便就近访问应用。为了支持业务路径优化，本申请实施例通过数据网络路由业务流导向，为UE选择合适的UPF，然后该UPF将UE的应用的业务数据导向到本地数据网络的该应用的服务器，从而实现UE就近访问本地数据网络中的应用。
上述方案，UPF确定的转发策略，可以先对业务数据执行局域网业务流导向，提升业务数据的传输质量和传输带宽。然后再对经过部署在局域网的业务功能网元处理后的业务数据执行数据网络路由业务流导向，以将处理后的业务数据发送至本地数据网络，从而实现用户就近访问本地数据网络中的应用。该方案一方面提升业务数据的传输质量和传输带宽，另一方面实现用户就近访问本地数据包中的应用，从而提升业务数据的传输性能，从而可以提升用户体验。
下面对上述图2的实施例中的FAR，以及FAR与转发策略之间的关系给出四种不同实现方法，该四种方法分别对应图4(a)、图4(b)、图5(a)、图5(b)。
图4(a)为本申请实施例提供的一种通信方法的流程示意图。该方法中，SMF从PCF接收到一个局域网业务流导向策略标识，以及一个数据网络路由控制信息，然后SMF根据该一个局域网业务流导向策略标识以及一个数据网络路由控制信息，确定转发动作规则。
该方法包括以下步骤：
步骤401a，PCF向SMF发送PCC规则。
该PCC规则包括应用的局域网业务流导向策略标识和数据网络路由控制信息，该数据网络路由控制信息包括至少一个数据网络接入标识(data network access identifier，DNAI)以及至少一个DNAI分别对应的数据网络路由业务流导向策略标识和/或数据网络路由信息。
其中，至少一个DNAI分别对应的数据网络路由业务流导向策略标识，指的是该至少一个DNAI中各个DNAI分别对应的数据网络路由业务流导向策略标识，DNAI与数据网络路由业务流导向策略标识一一对应，比如该至少一个DNAI包括DNAI1、DNAI2和DNAI3，则该DNAI1对应一个数据网络路由业务流导向策略标识，DNAI2对应一个数据网络路由业务流导向策略标识，DNAI3对应一个数据网络路由业务流导向策略标识，不同DNAI对应的数据网络路由业务流导向策略标识可以相同，也可以不同。
至少一个DNAI分别对应的数据网络路由信息，指的是该至少一个DNAI中各个DNAI分别对应的数据网络路由信息，DNAI与数据网络路由信息一一对应，比如该至少一个DNAI包括DNAI1、DNAI2和DNAI3，则该DNAI1对应一个数据网络路由信息，DNAI2 对应一个数据网络路由信息，DNAI3对应一个数据网络路由信息，不同DNAI对应的数据网络路由信息可以相同，也可以不同。
因此，该PCC规则中包含的内容分为以下三种情形：
情形1，PCC规则包括局域网业务流导向策略标识和数据网络路由控制信息，该数据网络路由控制信息包括至少一个DNAI，以及该至少一个DNAI分别对应的数据网络路由业务流导向策略标识。
情形2，PCC规则包括局域网业务流导向策略标识和数据网络路由控制信息，该数据网络路由控制信息包括至少一个DNAI，以及该至少一个DNAI分别对应的数据网络路由信息。
情形3，PCC规则包括局域网业务流导向策略标识和数据网络路由控制信息，该数据网络路由控制信息包括至少一个DNAI，该至少一个DNAI分别对应的数据网络路由业务流导向策略标识，以及该至少一个DNAI分别对应的数据网络路由信息。
其中，局域网业务流导向策略标识用于对应用的业务数据执行局域网业务流导向。局域网业务流导向策略标识也称为N6局域网业务流导向策略标识(N6-LAN traffic steering policy Id)、业务流导向策略标识。
数据网络路由业务流导向策略标识用于对应用的业务数据执行数据网络路由业务流导向。数据网络路由业务流导向策略标识也称为AF影响的业务流导向策略标识(AF-influenced Traffic Steering Policy Id)。
数据网络路由信息用于对应用的业务数据执行数据网络路由业务流导向，数据网络路由信息包括应用的服务器的地址、端口号或协议号中的至少一个。数据网络路由信息也称为N6路由信息(N6 routing Info)。
这里对局域网业务流导向策略标识、数据网络路由业务流导向策略标识、数据网络路由信息的含义进行说明，后面不赘述。
其中，DNAI用于标识数据网络，SMF可以根据DNAI选择UPF，该UPF可以将收到的数据发送到该DNAI对应的数据网络。该DNAI对应的数据网络也可称为本地数据网络。
步骤402a，SMF根据局域网业务流导向策略标识和数据网络路由控制信息，确定转发动作规则(FAR)。
针对上述情形1，该步骤402a具体是：SMF从数据网络路由控制信息中的至少一个DNAI中确定目标DNAI，然后SMF从至少一个DNAI对应的数据网络路由业务流导向策略标识中，确定目标DNAI对应的数据网络路由业务流导向策略标识，然后SMF根据局域网业务流导向策略标识和目标DNAI对应的数据网络路由业务流导向策略标识，确定转发策略标识。然后SMF根据转发策略标识确定FAR，该FAR包括转发策略标识。结合该情形，则UPF收到该FAR后，UPF根据以下方法确定该FAR对应的转发策略：UPF根据该FAR中的转发策略标识确定转发策略。可选的，该转发策略标识包括第一策略标识和第二策略标识，其中，SMF根据局域网业务流导向策略标识确定该第一策略标识，以及根据目标DNAI对应的数据网络路由业务流导向策略标识，确定第二策略标识，可选的，该第一策略标识的优先级高于第二策略标识的优先级。因此UPF根据第一策略标识和第二策略标识确定转发策略。其中，目标DNAI对应的数据网络是本地数据网络，这里统一说明，后面其它实施例不再赘述。
针对上述情形2，该步骤402a具体是：SMF从数据网络路由控制信息中的至少一个 DNAI中确定目标DNAI，然后SMF从至少一个DNAI对应的数据网络路由信息中，确定目标DNAI对应的数据网络路由信息，然后SMF根据局域网业务流导向策略标识确定转发策略标识。然后SMF根据转发策略标识和目标DNAI对应的数据网络路由信息确定FAR，该FAR包括转发策略标识和目标DNAI对应的数据网络路由信息。结合该情形，则UPF收到该FAR后，UPF根据以下方法确定该FAR对应的转发策略：UPF根据该FAR中的转发策略标识和目标DNAI对应的数据网络路由信息确定转发策略。可选的，转发策略标识的优先级高于目标DNAI对应的数据网络路由信息的优先级。
针对上述情形3，该步骤402a具体是：SMF从数据网络路由控制信息中的至少一个DNAI中确定目标DNAI，然后，SMF从至少一个DNAI对应的数据网络路由业务流导向策略标识中，确定目标DNAI对应的数据网络路由业务流导向策略标识，以及从至少一个DNAI对应的数据网络路由信息中，确定目标DNAI对应的数据网络路由信息。然后SMF根据局域网业务流导向策略标识和目标DNAI对应的数据网络路由业务流导向策略标识，确定转发策略标识。然后SMF根据转发策略标识和目标DNAI对应的数据网络路由信息确定FAR，该FAR包括转发策略标识和目标DNAI对应的数据网络路由信息。结合该情形，则UPF收到该FAR后，UPF根据以下方法确定该FAR对应的转发策略：UPF根据该FAR中的转发策略标识确定转发策略，或者，UPF根据该FAR中的转发策略标识和目标DNAI对应的数据网络路由信息确定转发策略。可选的，该转发策略标识包括第一策略标识和第二策略标识，其中，SMF根据局域网业务流导向策略标识确定该第一策略标识，以及根据目标DNAI对应的数据网络路由业务流导向策略标识，确定第二策略标识。可选的，该第一策略标识的优先级高于第二策略标识的优先级，该第一策略标识的优先级高于目标DNAI对应的数据网络路由信息的优先级。因此UPF根据第一策略标识和第二策略标识确定转发策略，或者UPF根据第一策略标识、第二策略标识以及目标DNAI对应的数据网络路由信息确定转发策略。
其中，SMF从数据网络路由控制信息中的至少一个DNAI中确定目标DNAI，比如可以是：SMF根据UE的位置和网络拓扑，从该至少一个DNAI中确定目标DNAI，该目标DNAI对应的数据网络，是该UE能够访问的多个数据网络中的最优数据网络。该目标DNAI用于指示本地数据网络，因此也称为本地数据网络对应的DNAI。这里做统一描述，后面不赘述。
步骤403a，SMF向UPF发送转发动作规则。
以及，SMF还可以向UPF发送与该转发动作规则关联的PDR。该PDR包括到来的数据包的源接口(Source Interface of incoming packet)，以及还包括业务数据流过滤器或应用标识，其中，到来的数据包的源接口的取值为Access(表示上行)，业务数据流过滤器可以是五元组信息。业务数据流过滤器或应用标识是根据PCC规则中的业务流模板确定的。
可选的，在SMF在向UPF发送转发动作规则之前，SMF确定UPF支持局域网业务流导向和数据网络路由业务流导向。若当前的UPF不支持局域网业务流导向和数据网络路由业务流导向，则SMF会选择一个支持的UPF，并且将业务数据分流到该UPF，或者重选一个UPF后将转发动作规则发送给新选择的UPF。
上述方案，会话管理网元向用户面网元发送的转发动作规则，可用于指示用户面网元先对业务数据执行局域网业务流导向，然后对处理后的业务数据执行数据网络路由业务流导向，以实现用户就近访问本地数据网络中的应用。该方案一方面提升业务数据的传输质 量和传输带宽，另一方面实现用户就近访问本地数据包中的应用，从而提升业务数据的传输性能，可以提升用户体验。
图4(b)为本申请实施例提供的一种通信方法的流程示意图。该方法中，SMF从PCF接收到至少两个局域网业务流导向策略标识，以及一个数据网络路由控制信息，然后SMF根据该至少两个局域网业务流导向策略标识以及一个数据网络路由控制信息，确定转发动作规则。
该方法包括以下步骤：
步骤401b，PCF向SMF发送PCC规则。
该PCC规则包括数据网络路由控制信息和至少两个DNAI分别对应的局域网业务流导向策略标识。该数据网络路由控制信息包括至少两个DNAI以及至少两个DNAI分别对应的数据网络路由业务流导向策略标识和/或数据网络路由信息。
其中，至少两个DNAI分别对应的局域网业务流导向策略标识，指的是该至少两个DNAI中各个DNAI分别对应的局域网业务流导向策略标识，DNAI与局域网业务流导向策略标识一一对应，比如该至少两个DNAI包括DNAI1、DNAI2和DNAI3，则该DNAI1对应一个局域网业务流导向策略标识，DNAI2对应一个局域网业务流导向策略标识，DNAI3对应一个局域网业务流导向策略标识，不同DNAI对应的局域网业务流导向策略标识可以相同，也可以不同。
至少两个DNAI分别对应的数据网络路由业务流导向策略标识，指的是该至少两个DNAI中各个DNAI分别对应的数据网络路由业务流导向策略标识，DNAI与数据网络路由业务流导向策略标识一一对应，比如该至少两个DNAI包括DNAI1、DNAI2和DNAI3，则该DNAI1对应一个数据网络路由业务流导向策略标识，DNAI2对应一个数据网络路由业务流导向策略标识，DNAI3对应一个数据网络路由业务流导向策略标识，不同DNAI对应的数据网络路由业务流导向策略标识可以相同，也可以不同。
至少两个DNAI分别对应的数据网络路由信息，指的是该至少两个DNAI中各个DNAI分别对应的数据网络路由信息，DNAI与数据网络路由信息一一对应，比如该至少两个DNAI包括DNAI1、DNAI2和DNAI3，则该DNAI1对应一个数据网络路由信息，DNAI2对应一个数据网络路由信息，DNAI3对应一个数据网络路由信息，不同DNAI对应的数据网络路由信息可以相同，也可以不同。
因此，该PCC规则中包含的内容分为以下三种情形：
情形1，PCC规则包括数据网络路由控制信息和至少两个DNAI分别对应的局域网业务流导向策略标识，该数据网络路由控制信息包括至少两个DNAI，以及该至少两个DNAI分别对应的数据网络路由业务流导向策略标识。
情形2，PCC规则包括数据网络路由控制信息和至少两个DNAI分别对应的局域网业务流导向策略标识，该数据网络路由控制信息包括至少两个DNAI，以及该至少两个DNAI分别对应的数据网络路由信息。
情形3，PCC规则包括数据网络路由控制信息和至少两个DNAI分别对应的局域网业务流导向策略标识，该数据网络路由控制信息包括至少两个DNAI，该至少两个DNAI分别对应的数据网络路由业务流导向策略标识，以及该至少两个DNAI分别对应的数据网络路由信息。
步骤402b，SMF根据数据网络路由控制信息和至少两个DNAI分别对应的局域网业 务流导向策略标识，确定转发动作规则(FAR)。
针对上述情形1，该步骤402b具体是：SMF从数据网络路由控制信息中的至少两个DNAI中确定目标DNAI，然后SMF从至少两个DNAI对应的数据网络路由业务流导向策略标识中，确定目标DNAI对应的数据网络路由业务流导向策略标识，以及从至少两个DNAI对应的局域网业务流导向策略标识中，确定目标DNAI对应的局域网业务流导向策略标识，然后SMF根据目标DNAI对应的局域网业务流导向策略标识和目标DNAI对应的数据网络路由业务流导向策略标识，确定转发策略标识。然后SMF根据转发策略标识确定FAR，该FAR包括转发策略标识。结合该情形，则UPF收到该FAR后，UPF根据以下方法确定该FAR对应的转发策略：UPF根据该FAR中的转发策略标识确定转发策略。可选的，该转发策略标识包括第一策略标识和第二策略标识，其中，SMF根据目标DNAI对应的局域网业务流导向策略标识确定该第一策略标识，以及根据目标DNAI对应的数据网络路由业务流导向策略标识，确定第二策略标识。可选的，该第一策略标识的优先级高于第二策略标识的优先级。因此UPF根据第一策略标识和第二策略标识确定转发策略。
针对上述情形2，该步骤402b具体是：SMF从数据网络路由控制信息中的至少两个DNAI中确定目标DNAI，然后SMF从至少两个DNAI对应的数据网络路由信息中，确定目标DNAI对应的数据网络路由信息，以及从至少两个DNAI对应的局域网业务流导向策略标识中，确定目标DNAI对应的局域网业务流导向策略标识，然后SMF根据目标DNAI对应的局域网业务流导向策略标识确定转发策略标识。然后SMF根据转发策略标识和目标DNAI对应的数据网络路由信息确定FAR，该FAR包括转发策略标识和目标DNAI对应的数据网络路由信息。结合该情形，则UPF收到该FAR后，UPF根据以下方法确定该FAR对应的转发策略：UPF根据该FAR中的转发策略标识和目标DNAI对应的数据网络路由信息确定转发策略。可选的，转发策略标识的优先级高于目标DNAI对应的数据网络路由信息的优先级。
针对上述情形3，该步骤402b具体是：SMF从数据网络路由控制信息中的至少两个DNAI中确定目标DNAI，然后，SMF从至少两个DNAI对应的数据网络路由业务流导向策略标识中，确定目标DNAI对应的数据网络路由业务流导向策略标识，从至少两个DNAI对应的局域网业务流导向策略标识中，确定目标DNAI对应的局域网业务流导向策略标识，以及从至少两个DNAI对应的数据网络路由信息中，确定目标DNAI对应的数据网络路由信息。然后SMF根据目标DNAI对应的局域网业务流导向策略标识和目标DNAI对应的数据网络路由业务流导向策略标识，确定转发策略标识。然后SMF根据转发策略标识和目标DNAI对应的数据网络路由信息确定FAR，该FAR包括转发策略标识和目标DNAI对应的数据网络路由信息。结合该情形，则UPF收到该FAR后，UPF根据以下方法确定该FAR对应的转发策略：UPF根据该FAR中的转发策略标识确定转发策略，或者，UPF根据该FAR中的转发策略标识和目标DNAI对应的数据网络路由信息确定转发策略。可选的，该转发策略标识包括第一策略标识和第二策略标识，其中，SMF根据目标DNAI对应的局域网业务流导向策略标识确定该第一策略标识，以及根据目标DNAI对应的数据网络路由业务流导向策略标识，确定第二策略标识。可选的，该第一策略标识的优先级高于第二策略标识的优先级。因此UPF根据第一策略标识和第二策略标识确定转发策略，或者UPF根据第一策略标识、第二策略标识以及目标DNAI对应的数据网络路由信息确定转发策略。
步骤403b，SMF向UPF发送转发动作规则。
以及，SMF还可以向UPF发送与该转发动作规则关联的PDR。该PDR包括到来的数据包的源接口(Source Interface of incoming packet)，以及还包括业务数据流过滤器或应用标识，其中，到来的数据包的源接口的取值为Access(表示上行)，业务数据流过滤器可以是五元组信息。业务数据流过滤器或应用标识是根据PCC规则中的业务流模板确定的。
可选的，在SMF在向UPF发送转发动作规则之前，SMF确定UPF支持局域网业务流导向和数据网络路由业务流导向。若当前的UPF不支持局域网业务流导向和数据网络路由业务流导向，则SMF会选择一个支持的UPF，并且将业务数据分流到该UPF，或者重选一个UPF后将转发动作规则发送给新选择的UPF。
上述方案，SMF向UPF发送的转发动作规则，可用于指示UPF先对业务数据执行局域网业务流导向，然后对处理后的业务数据执行数据网络路由业务流导向，以实现用户就近访问本地数据网络中的应用。该方案一方面提升业务数据的传输质量和传输带宽，另一方面实现用户就近访问本地数据包中的应用，从而提升业务数据的传输性能，可以提升用户体验。并且，该方案可以提供多个局域网业务流导向策略标识，并从多个局域网业务流导向策略标识选择使用的局域网业务流导向策略标识，有助于提升转发策略的准确性，进而提升业务数据发送速度和准确性，进一步提升用户体验。
图5(a)为本申请实施例提供的一种通信方法的流程示意图。该方法中，PCF接收到一个业务链标识，以及至少一个DNAI分别对应的配置标识和/或数据网络路由信息，然后PCF根据该一个业务链标识，或者根据该一个业务链标识和至少一个DNAI对应的配置标识，确定至少一个DNAI对应的业务流导向策略标识，并通过PCC规则将至少一个DNAI对应的业务流导向策略标识发送给SMF，或通过PCC规则将至少一个DNAI对应的业务流导向策略标识和数据网络路由信息发送给SMF，由SMF根据该至少一个DNAI对应的业务流导向策略标识确定转发动作规则，或根据至少一个DNAI对应的业务流导向策略标识和数据网络路由信息确定转发动作规则。
该方法包括以下步骤：
步骤501a，PCF接收业务链标识(service function chain Id)、至少一个DNAI以及至少一个DNAI分别对应的配置标识和/或数据网络路由信息。
比如，PCF从AF接收业务链标识、至少一个DNAI以及至少一个DNAI分别对应的配置标识。该AF可以应用的服务器。
至少一个DNAI分别对应的配置标识，指的是该至少一个DNAI中各个DNAI分别对应的配置标识，DNAI与配置标识一一对应，比如该至少一个DNAI包括DNAI1、DNAI2和DNAI3，则该DNAI1对应一个配置标识，DNAI2对应一个配置标识，DNAI3对应一个配置标识，不同DNAI对应的配置标识可以相同，也可以不同。
至少一个DNAI分别对应的数据网络路由信息，指的是该至少一个DNAI中各个DNAI分别对应的数据网络路由信息，DNAI与数据网络路由信息一一对应，比如该至少一个DNAI包括DNAI1、DNAI2和DNAI3，则该DNAI1对应一个数据网络路由信息，DNAI2对应一个数据网络路由信息，DNAI3对应一个数据网络路由信息，不同DNAI对应的数据网络路由信息可以相同，也可以不同。
该业务链标识指示一个业务链，该业务链用于对应用的业务数据执行业务链处理。
该配置标识用于对应用的业务数据执行数据网络路由业务流导向，该配置标识也称为 N6配置标识(N6 Profile ID)。
数据网络路由信息用于对应用的业务数据执行数据网络路由业务流导向。数据网络路由信息包括应用的服务器的地址、端口号或协议号中的至少一个。数据网络路由信息也称为N6路由信息(N6 routing Info)。
因此，PCF接收到的信息分为以下三种情形：
情形1，PCF接收业务链标识、至少一个DNAI以及至少一个DNAI分别对应的配置标识。
情形2，PCF接收业务链标识、至少一个DNAI以及至少一个DNAI分别对应的数据网络路由信息。
情形3，PCF接收业务链标识、至少一个DNAI、至少一个DNAI分别对应的配置标识，以及至少一个DNAI分别对应的数据网络路由信息。
步骤502a，PCF确定PCC规则。
情形a，对应上述情形1，PCF根据业务链标识和至少一个DNAI分别对应的配置标识，确定至少一个DNAI分别对应的业务流导向策略标识。然后根据至少一个DNAI分别对应的业务流导向策略标识确定PCC规则，该PCC规则包括至少一个DNAI以及至少一个DNAI分别对应的业务流导向策略标识。
示例性的，至少一个DNAI分别对应的配置标识与至少一个DNAI分别对应的业务流导向策略标识一一对应。比如DNAI1对应配置标识1，DNAI2对应配置标识2，DNAI3对应配置标识3，则PCF根据业务链标识和配置标识1确定业务流导向策略标识1，根据业务链标识和配置标识2确定业务流导向策略标识2，根据业务链标识和配置标识3确定业务流导向策略标识3。
其中，业务流导向策略标识用于对应用的业务数据执行局域网业务流导向和对应用的业务数据执行数据网络路由业务流导向。
情形b，对应上述情形2，PCF根据业务链标识，确定业务流导向策略标识。然后根据业务流导向策略标识和至少一个DNAI分别对应的数据网络路由信息确定PCC规则，该PCC规则包括业务流导向策略标识、至少一个DNAI以及至少一个DNAI分别对应的数据网络路由信息。
其中，业务流导向策略标识用于对应用的业务数据执行局域网业务流导向。
数据网络路由信息用于对应用的业务数据执行数据网络路由业务流导向，数据网络路由信息包括应用的服务器的地址、端口号或协议号中的至少一个。
情形c，对应上述情形3，PCF根据业务链标识和至少一个DNAI分别对应的配置标识，确定至少一个DNAI分别对应的业务流导向策略标识。然后根据至少一个DNAI分别对应的业务流导向策略标识和至少一个DNAI分别对应的数据网络路由信息确定PCC规则，该PCC规则包括至少一个DNAI，以及至少一个DNAI分别对应的业务流导向策略标识和至少一个DNAI分别对应的数据网络路由信息。
示例性的，至少一个DNAI分别对应的配置标识与至少一个DNAI分别对应的业务流导向策略标识一一对应。比如DNAI1对应配置标识1，DNAI2对应配置标识2，DNAI3对应配置标识3，则PCF根据业务链标识和配置标识1确定业务流导向策略标识1，根据业务链标识和配置标识2确定业务流导向策略标识2，根据业务链标识和配置标识3确定业务流导向策略标识3。
其中，业务流导向策略标识用于对应用的业务数据执行局域网业务流导向和对应用的业务数据执行数据网络路由业务流导向。
数据网络路由信息用于对应用的业务数据执行数据网络路由业务流导向，数据网络路由信息包括应用的服务器的地址、端口号或协议号中的至少一个。
步骤503a，PCF向SMF发送PCC规则。
步骤504a，SMF根据PCC规则，确定转发动作规则(FAR)。
针对上述情形a，该步骤504a具体是：SMF从至少一个DNAI中确定目标DNAI，然后SMF从至少一个DNAI分别对应的业务流导向策略标识中，确定目标DNAI对应的业务流导向策略标识，然后SMF根据目标DNAI对应的业务流导向策略标识，确定转发策略标识。然后SMF根据转发策略标识确定FAR，该FAR包括转发策略标识。结合该情形，则UPF收到该FAR后，UPF根据以下方法确定该FAR对应的转发策略：UPF根据该FAR中的转发策略标识确定转发策略。
针对上述情形b，该步骤504a具体是：SMF从至少一个DNAI中确定目标DNAI，然后SMF从至少一个DNAI分别对应的数据网络路由信息中，确定目标DNAI对应的数据网络路由信息，然后SMF根据业务流导向策略标识，确定转发策略标识。然后SMF根据转发策略标识和目标DNAI对应的数据网络路由信息，确定FAR，该FAR包括转发策略标识和目标DNAI对应的数据网络路由信息。结合该情形，则UPF收到该FAR后，UPF根据以下方法确定该FAR对应的转发策略：UPF根据该FAR中的转发策略标识和目标DNAI对应的数据网络路由信息确定转发策略。
针对上述情形c，该步骤504a具体是：SMF从至少一个DNAI中确定目标DNAI，然后SMF从至少一个DNAI分别对应的业务流导向策略标识中，确定目标DNAI对应的业务流导向策略标识，以及从至少一个DNAI分别对应的数据网络路由信息中，确定目标DNAI对应的数据网络路由信息，然后SMF根据目标DNAI对应的业务流导向策略标识，确定转发策略标识。然后SMF根据转发策略标识和目标DNAI对应的数据网络路由信息确定FAR，该FAR包括转发策略标识。结合该情形，则UPF收到该FAR后，UPF根据以下方法确定该FAR对应的转发策略：UPF根据该FAR中的转发策略标识确定转发策略，或者，UPF根据该FAR中的转发策略标识和目标DNAI对应的数据网络路由信息确定转发策略。
步骤505a，SMF向UPF发送转发动作规则。
以及，SMF还可以向UPF发送与该转发动作规则关联的PDR。该PDR包括到来的数据包的源接口(Source Interface of incoming packet)，以及还包括业务数据流过滤器或应用标识，其中，到来的数据包的源接口的取值为Access(表示上行)，业务数据流过滤器可以是五元组信息。业务数据流过滤器或应用标识是根据PCC规则中的业务流模板确定的。
可选的，在SMF在向UPF发送转发动作规则之前，SMF确定UPF支持局域网业务流导向和数据网络路由业务流导向。若当前的UPF不支持局域网业务流导向和数据网络路由业务流导向，则SMF会选择一个支持的UPF，并且将业务数据分流到该UPF，或者重选一个UPF后将转发动作规则发送给新选择的UPF。
上述方案，PCF向SMF发送PCC规则，SMF可根据该PCC规则向UPF指示先对业务数据执行局域网业务流导向，然后对处理后的业务数据执行数据网络路由业务流导向，以实现用户就近访问本地数据网络中的应用。该方案一方面提升业务数据的传输质量和传 输带宽，另一方面实现用户就近访问本地数据包中的应用，从而提升业务数据的传输性能，可以提升用户体验。
图5(b)为本申请实施例提供的一种通信方法的流程示意图。该方法中，PCF接收到至少两个DNAI分别对应的业务链标识，以及至少两个DNAI分别对应的配置标识和/或数据网络路由信息，然后PCF根据该至少两个DNAI分别对应的业务链标识，或者根据该至少两个DNAI分别对应的业务链标识和至少两个DNAI对应的配置标识，确定至少两个DNAI对应的业务流导向策略标识，并通过PCC规则将至少两个DNAI对应的业务流导向策略标识发送给SMF，或通过PCC规则将至少两个DNAI对应的业务流导向策略标识和数据网络路由信息发送给SMF，由SMF根据该至少两个DNAI对应的业务流导向策略标识确定转发动作规则，或根据至少两个DNAI对应的业务流导向策略标识和数据网络路由信息确定转发动作规则。
该方法包括以下步骤：
步骤501b，PCF接收至少两个DNAI、至少两个DNAI分别对应的业务链标识(service function chain Id)，以及接收至少两个DNAI分别对应的配置标识和/或至少两个DNAI分别对应的数据网络路由信息。
比如，PCF从AF接收至少两个DNAI、至少两个DNAI分别对应的业务链标识、至少两个DNAI分别对应的配置标识以及至少两个DNAI分别对应的数据网络路由信息。该AF可以应用的服务器。
其中，至少两个DNAI分别对应的业务链标识，指的是该至少两个DNAI中各个DNAI分别对应的业务链标识，DNAI与业务链标识一一对应，比如该至少两个DNAI包括DNAI1、DNAI2和DNAI3，则该DNAI1对应一个业务链标识，DNAI2对应一个业务链标识，DNAI3对应一个业务链标识，不同DNAI对应的业务链标识可以相同，也可以不同。
至少两个DNAI分别对应的配置标识，指的是该至少两个DNAI中各个DNAI分别对应的配置标识，DNAI与配置标识一一对应，比如该至少两个DNAI包括DNAI1、DNAI2和DNAI3，则该DNAI1对应一个配置标识，DNAI2对应一个配置标识，DNAI3对应一个配置标识，不同DNAI对应的配置标识可以相同，也可以不同。
至少两个DNAI分别对应的数据网络路由信息，指的是该至少两个DNAI中各个DNAI分别对应的数据网络路由信息，DNAI与数据网络路由信息一一对应，比如该至少两个DNAI包括DNAI1、DNAI2和DNAI3，则该DNAI1对应一个数据网络路由信息，DNAI2对应一个数据网络路由信息，DNAI3对应一个数据网络路由信息，不同DNAI对应的数据网络路由信息可以相同，也可以不同。
该业务链标识指示一个业务链，该业务链用于指示对应用的业务数据执行业务链处理。
该配置标识用于对应用的业务数据执行数据网络路由业务流导向，该配置标识也称为N6配置标识(N6 Profile ID)。
数据网络路由信息用于对应用的业务数据执行数据网络路由业务流导向，数据网络路由信息包括应用的服务器的地址、端口号或协议号中的至少一个。数据网络路由信息也称为N6路由信息(N6 routing Info)。
因此，PCF接收到的信息分为以下三种情形：
情形1，PCF接收业务链标识、至少两个DNAI以及至少两个DNAI分别对应的配置标识。
情形2，PCF接收业务链标识、至少两个DNAI以及至少两个DNAI分别对应的数据网络路由信息。
情形3，PCF接收业务链标识、至少两个DNAI、至少两个DNAI分别对应的配置标识，以及至少两个DNAI分别对应的数据网络路由信息。
步骤502b，PCF确定PCC规则。
情形a，对应上述情形1，PCF根据至少两个DNAI分别对应的业务链标识和至少两个DNAI分别对应的配置标识，确定至少两个DNAI分别对应的业务流导向策略标识。然后根据至少两个DNAI分别对应的业务流导向策略标识确定PCC规则，该PCC规则包括至少两个DNAI以及至少两个DNAI分别对应的业务流导向策略标识。
示例性的，至少两个DNAI分别对应的配置标识与至少两个DNAI分别对应的业务流导向策略标识一一对应，至少两个DNAI分别对应的业务链标识与至少两个DNAI分别对应的业务流导向策略标识一一对应。比如DNAI1对应配置标识1和业务链标识1，DNAI2对应配置标识2和业务链标识2，DNAI3对应配置标识3和业务链标识3，则PCF根据业务链标识1和配置标识1确定业务流导向策略标识1，根据业务链标识2和配置标识2确定业务流导向策略标识2，根据业务链标识3和配置标识3确定业务流导向策略标识3。
其中，业务流导向策略标识用于对应用的业务数据执行局域网业务流导向和对应用的业务数据执行数据网络路由业务流导向。
情形b，对应上述情形2，PCF根据至少两个DNAI分别对应的业务链标识，确定至少两个DNAI分别对应的业务流导向策略标识。然后根据至少两个DNAI分别对应的业务流导向策略标识和至少两个DNAI分别对应的数据网络路由信息确定PCC规则，该PCC规则包括至少两个DNAI、至少两个DNAI分别对应的业务流导向策略标识以及至少两个DNAI分别对应的数据网络路由信息。
其中，业务流导向策略标识用于对应用的业务数据执行局域网业务流导向。
数据网络路由信息用于对应用的业务数据执行数据网络路由业务流导向，数据网络路由信息包括应用的服务器的地址、端口号或协议号中的至少一个。
情形c，对应上述情形3，PCF根据至少两个DNAI分别对应的业务链标识和至少两个DNAI分别对应的配置标识，确定至少两个DNAI分别对应的业务流导向策略标识。然后根据至少两个DNAI分别对应的业务流导向策略标识和至少两个DNAI分别对应的数据网络路由信息确定PCC规则，该PCC规则包括至少两个DNAI、至少两个DNAI分别对应的业务流导向策略标识以及至少两个DNAI分别对应的数据网络路由信息。
示例性的，至少两个DNAI分别对应的配置标识与至少两个DNAI分别对应的业务流导向策略标识一一对应，至少两个DNAI分别对应的业务链标识与至少两个DNAI分别对应的业务流导向策略标识一一对应。比如DNAI1对应配置标识1和业务链标识1，DNAI2对应配置标识2和业务链标识2，DNAI3对应配置标识3和业务链标识3，则PCF根据业务链标识1和配置标识1确定业务流导向策略标识1，根据业务链标识2和配置标识2确定业务流导向策略标识2，根据业务链标识3和配置标识3确定业务流导向策略标识3。
其中，业务流导向策略标识用于对应用的业务数据执行局域网业务流导向和对应用的业务数据执行数据网络路由业务流导向。
数据网络路由信息用于对应用的业务数据执行数据网络路由业务流导向，数据网络路由信息包括应用的服务器的地址、端口号或协议号中的至少一个。
步骤503b，PCF向SMF发送PCC规则。
步骤504b，SMF根据PCC规则，确定转发动作规则(FAR)。
针对上述情形a，该步骤504b具体是：SMF从至少两个DNAI中确定目标DNAI，然后SMF从至少两个DNAI分别对应的业务流导向策略标识中，确定目标DNAI对应的业务流导向策略标识，然后SMF根据目标DNAI对应的业务流导向策略标识，确定转发策略标识。然后SMF根据转发策略标识确定FAR，该FAR包括转发策略标识。结合该情形，则UPF收到该FAR后，UPF根据以下方法确定该FAR对应的转发策略：UPF根据该FAR中的转发策略标识确定转发策略。
针对上述情形b，该步骤504b具体是：SMF从至少两个DNAI中确定目标DNAI，然后SMF从至少两个DNAI分别对应的数据网络路由信息中，确定目标DNAI对应的数据网络路由信息，然后SMF根据业务流导向策略标识，确定转发策略标识。然后SMF根据转发策略标识和目标DNAI对应的数据网络路由信息，确定FAR，该FAR包括转发策略标识和目标DNAI对应的数据网络路由信息。结合该情形，则UPF收到该FAR后，UPF根据以下方法确定该FAR对应的转发策略：UPF根据该FAR中的转发策略标识和目标DNAI对应的数据网络路由信息确定转发策略。
针对上述情形c，该步骤504b具体是：SMF从至少两个DNAI中确定目标DNAI，然后SMF从至少两个DNAI分别对应的业务流导向策略标识中，确定目标DNAI对应的业务流导向策略标识，以及从至少两个DNAI分别对应的数据网络路由信息中，确定目标DNAI对应的数据网络路由信息，然后SMF根据目标DNAI对应的业务流导向策略标识，确定转发策略标识。然后SMF根据转发策略标识和目标DNAI对应的数据网络路由信息确定FAR，该FAR包括转发策略标识。结合该情形，则UPF收到该FAR后，UPF根据以下方法确定该FAR对应的转发策略：UPF根据该FAR中的转发策略标识确定转发策略，或者，UPF根据该FAR中的转发策略标识和目标DNAI对应的数据网络路由信息确定转发策略。
步骤505b，SMF向UPF发送转发动作规则。
以及，SMF还可以向UPF发送与该转发动作规则关联的PDR。该PDR包括到来的数据包的源接口(Source Interface of incoming packet)，以及还包括业务数据流过滤器或应用标识，其中，到来的数据包的源接口的取值为Access(表示上行)，业务数据流过滤器可以是五元组信息。业务数据流过滤器或应用标识是根据PCC规则中的业务流模板确定的。
可选的，在SMF在向UPF发送转发动作规则之前，SMF确定UPF支持局域网业务流导向和数据网络路由业务流导向。若当前的UPF不支持局域网业务流导向和数据网络路由业务流导向，则SMF会选择一个支持的UPF，并且将业务数据分流到该UPF，或者重选一个UPF后将转发动作规则发送给新选择的UPF。
上述方案，PCF向SMF发送PCC规则，SMF可根据该PCC规则向UPF指示先对业务数据执行局域网业务流导向，然后对处理后的业务数据执行数据网络路由业务流导向，以实现用户就近访问本地数据网络中的应用。该方案一方面提升业务数据的传输质量和传输带宽，另一方面实现用户就近访问本地数据包中的应用，从而提升业务数据的传输性能，可以提升用户体验。并且，该方案可以提供多个业务流导向策略标识，并从多个业务流导向策略标识选择使用的业务流导向策略标识，有助于提升转发策略的准确性，进而提升业务数据发送速度和准确性，进一步提升用户体验。
一种实现方法中，在上述图4(a)、图4(b)、图5(a)或图5(b)实施例中，SMF也可以不确定转发策略，因此转发动作规则中不携带转发策略，而是携带用于生成转发策略的信息，由UPF根据用于生成转发策略的信息确定转发策略。其中UPF确定转发策略的方式，可以参考上述图4(a)、图4(b)、图5(a)或图5(b)实施例中SMF确定转发策略的方式，不做赘述。
下面结合图6至图11所示的具体示例，对上述图2、图4(a)、图4(b)、图5(a)以及图5(b)的实施例进行具体说明。
需要说明的是，以下实施例中的N6配置标识(N6 Profile ID)与前述实施例中的配置标识的含义相同，以下实施例中的N6路由信息(N6 routing Info)与前述实施例中的数据网络路由信息的含义相同，以下实施例中的业务流导向策略标识与前述实施例中的局域网业务流导向策略标识、业务流导向策略标识的含义相同，以下实施例中的AF影响的业务流导向策略标识与前述实施例中的数据网络路由业务流导向策略标识的含义相同，以下实施例中的本地策略与前述实施例中的转发策略的含义相同。
图6为本申请实施例提供的一种通信方法的流程示意图。该方法中，针对单个UE，AF在为UE访问的业务请求网络资源时，向核心网请求对业务进行业务链处理和业务流导向控制。
该方法包括以下步骤：
步骤601，UE建立PDU会话的流程。
该流程中，UE请求建立PDU会话，网络为PDU选择协议数据单元锚点(PDU session anchor，PSA)UPF，网络为UE分配地址。UE通过建立的PDU会话访问DN中的AF(即应用服务器)。
步骤602，AF向PCF发送策略授权建立请求消息，该策略授权建立请求消息包括业务流描述信息、业务链标识(service function chain Id，SFC Id)和路由需求信息(routing requirement)。
比如，当AF决定为UE正在访问的应用请求网络资源以及业务增值服务，同时AF决定对访问应用的数据进行业务流导向控制(traffic steering control)到特定的DN，则AF向PCF发送该策略授权建立请求消息。
示例性地，该策略授权建立请求消息可以是Npcf_PolicyAuthorization_Create请求消息。
其中，业务流描述信息用于描述业务流，比如可以是五元组信息。
业务链标识指示一个业务链，该业务链用于指示对应用的业务数据执行业务链处理，也即业务链标识指示对业务数据执行局域网业务流导向。业务链标识可以是应用与运营商之间协商得到的。可选地，如果AF对业务的上下行数据有不同的业务链需求，则AF可以分别提供上行业务链标识(uplinkSFC Id)和下行业务链标识(downlink SFC Id)。
路由需求信息指示对业务数据的业务流导向控制方式。路由需求信息包括至少一个数据网络接入标识(Data Network Access Identified，DNAI)以及每个DNAI对应的N6配置标识(N6 Profile ID)和/或N6路由信息(N6 routing Info)。其中，DNAI指示部署了AF的DN的用户面接入标识，N6配置标识指示AF与核心网协商的策略，N6路由信息包括部署在DN的AF的地址、端口号和协议号中的至少一个。其中，路由需求信息也可以称为N6路由需求信息。
可选的，该策略授权建立请求消息还包括请求的QoS需求。
可选的，该策略授权建立请求消息可以包括多个业务链标识以及每个业务链标识对应的DNAI，表示在接入不同位置的DN时，请求执行不同的业务链。
步骤603，PCF保存收到的信息，并向AF返回策略授权建立响应消息。
可选的，当PCF对AF的请求授权成功时，该策略授权建立响应消息包括用于指示接受请求的指示信息。
步骤604，PCF确定策略计费控制(Policy and Charging Control，PCC)规则。
该PCC规则包括业务流模板(SDF Template)、业务流导向策略标识(Traffic Steering Policy Id，TSP Id)和路由描述信息。
其中，业务流模板是PCF根据业务流描述信息确定的。
业务流导向策略标识是PCF根据业务链标识确定的，业务流导向策略标识用于对业务数据执行局域网业务流导向。当业务链标识包括上行业务链标识和下行业务链标识，则PCF根据上行业务链标识确定上行业务流导向策略标识，以及根据下行业务链标识确定下行业务流导向策略标识，也即该PCC规则包括上行业务流导向策略标识和下行业务流导向策略标识。其中，业务流导向策略标识也称为N6局域网业务流导向策略标识(N6-LAN Traffic Steering Policy Id)。
路由描述信息包括至少一个DNAI以及每个DNAI对应的AF影响的业务流导向策略标识(AF-influenced Traffic Steering Policy Id)和/或N6路由信息(N6 routing Info)。其中，AF影响的业务流导向策略标识是PCF根据N6配置标识确定的。该N6路由信息即为上述步骤601中描述的N6路由信息。
步骤605，PCF向SMF发送PCC规则。
例如，PCF向SMF发送Npcf_SMPolicyControl_UpdateNotify Request消息，该消息中包括PCC规则。
步骤606，SMF安装PCC规则后向PCF发送响应消息。
例如，该响应消息是Npcf_SMPolicyControl_UpdateNotify Response消息。
步骤607，SMF根据PCC规则确定N4规则。
SMF根据UE的位置信息、网络拓扑以及路由描述信息中的至少一个DNAI，确定UPF。该UPF可以是该至少一个DNAI对应的UPF中的与该UE最近的一个UPF。
SMF选择UPF后，根据PCC规则为该UPF确定N4规则。
该N4规则包括上行包检测规则(Packet Detection Rule，PDR)和上行转发动作规则(Forwarding Action Rule，FAR)，以及下行PDR和下行FAR。
其中，上行PDR用于匹配上行业务流，上行PDR中包括到来的数据包的源接口(Source Interface of incoming packet)，以及还包括业务数据流过滤器或应用标识，其中，到来的数据包的源接口的取值为Access(表示上行)，业务数据流过滤器可以是五元组信息。业务数据流过滤器或应用标识是根据PCC规则中的业务流模板确定的。
上行FAR可以通过以下三种方法中的任一种方法实现：
方法1，SMF根据上行业务流导向策略标识和AF影响的业务流导向策略标识，确定上行转发策略标识(Forwarding Policy Id)。上行FAR中包括该上行转发策略标识。
其中，用于确定上行转发策略标识的AF影响的业务流导向策略标识，与确定的UPF对应的DNAI存在对应关系。
方法2，SMF根据上行业务流导向策略标识，确定上行转发策略标识(Forwarding Policy  Id)。上行FAR中包括该上行转发策略标识和N6路由信息。
其中，上行FAR中的N6路由信息，与确定的UPF对应的DNAI存在对应关系。
方法3，SMF根据上行业务流导向策略标识和AF影响的业务流导向策略标识，确定上行转发策略标识(Forwarding Policy Id)。上行FAR中包括该上行转发策略标识和N6路由信息。
其中，用于确定上行转发策略标识的AF影响的业务流导向策略标识，与确定的UPF对应的DNAI存在对应关系。上行FAR中的N6路由信息，与确定的UPF对应的DNAI存在对应关系。
下行PDR用于匹配下行业务流，下行PDR中包括到来的数据包的源接口(Source Interface of incoming packet)，以及还包括业务数据流过滤器或应用标识，其中，到来的数据包的源接口的取值为Core(表示下行)，业务数据流过滤器可以是五元组信息。业务数据流过滤器或应用标识是根据PCC规则中的业务流模板确定的。下行FAR包括下行转发策略标识，该下行转发策略标识是SMF根据下行业务流导向策略标识确定的。
步骤608，SMF向UPF发送N4规则。
比如，SMF在N4会话修改流程中，向UPF发送N4规则。
步骤609，UPF根据N4规则处理业务流的业务数据。
针对上行业务数据，当UPF根据上行PDR匹配到应用的上行业务数据时，UPF确定该上行PDR对应的上行FAR，并执行该上行FAR对应的本地策略，该本地策略为以下任一种：
策略一：UPF将上行业务数据发送到该本地策略对应的业务链的业务功能(Service Function)进行处理得到处理后的上行业务数据，然后UPF再根据该本地策略将处理后的上行业务数据进行业务流导向到部署在DN中的AF。
策略二：UPF将上行业务数据发送到该本地策略对应的业务链的业务功能(Service Function)进行处理得到处理后的上行业务数据，然后UPF在处理后的上行业务数据中添加包头，该包头携带N6路由信息，接着UPF向交换机发送添加了包头的上行业务数据，由交换机根据N6路由信息，将添加了包头的上行业务数据进行业务流导向到部署在DN中的AF。
针对下行业务数据，当UPF根据下行PDR匹配到应用的下行业务数据时，UPF确定该下行PDR对应的下行转发策略标识，并执行该下行转发策略标识对应的本地策略，该本地策略为：UPF将下行业务数据发送到该本地策略对应的业务功能(Service Function)进行处理得到处理后的下行业务数据，然后UPF将处理后的下行业务数据发送基站或其它UPF。
上述方案，由于UPF收到的上行FAR中的上行转发策略标识对应的本地策略既支持业务流的业务链路由，又支持将业务流导向到DN，因此UPF可以根据上行FAR对上行业务流同时执行业务链处理和业务流导向控制，提升了上行业务流的处理效率，可以提升用户体验。
图7为本申请实施例提供的一种通信方法的流程示意图，该方法中，针对一组UE或任意，AF在为UE访问的业务请求网络资源时，向核心网请求对业务进行业务链处理和业务流导向控制。
该方法包括以下步骤：
步骤701，AF向NEF发送业务流影响建立请求消息，该业务流影响建立请求消息包括业务流描述信息、外部业务链标识(externalservice function chain Id，external SFC Id)和路由需求信息(routing requirement)，以及还包括外部用户组标识或用于指示任意UE的指示信息。
比如，当AF决定为一组UE或任意UE访问的应用请求网络资源以及业务增值服务，同时AF决定对访问应用的数据进行业务流导向控制(traffic steering control)到特定的DN，则AF向PCF发送该业务流影响建立请求消息。
示例性地，该业务流影响建立请求消息可以是Nnef_TrafficInfluence_Create请求消息。
其中，业务流描述信息用于描述业务流，比如可以是三元组信息或应用标识。
外部业务链标识指示一个业务链，该业务链用于指示对应用的业务数据执行业务链处理。外部业务链标识可以是应用与运营商之间协商得到的。可选地，如果AF对业务的上下行数据有不同的业务链需求，则AF可以分别提供上行外部业务链标识(uplinkexternal SFC Id)和下行外部业务链标识(downlink externalSFC Id)。
路由需求信息指示对业务数据的业务流导向控制方式。路由需求信息包括至少一个DNAI以及每个DNAI对应的N6配置标识(N6 Profile ID)和/或N6路由信息(N6 routing Info)。其中，DNAI指示部署了AF的DN的用户面接入标识，N6配置标识指示AF与核心网协商的策略，N6路由信息包括部署在DN的AF的地址、端口号和协议号中的至少一个。其中，路由需求信息也可以称为N6路由需求信息。
可选的，该业务流影响建立请求消息可以包括多个外部业务链标识以及每个外部业务链标识对应的DNAI，表示在接入不同位置的DN时，请求执行不同的业务链。
步骤702，NEF对AF的请求进行授权，并执行相应的映射。
其中，NEF执行的映射操作包括将外部业务链标识映射为内部业务链标识(Internal service function chain Id，Internal SFC Id)，以及将外部用户组标识映射为内部用户组标识。
可选的，如果外部业务链标识包括上行外部业务链标识和下行外部业务链标识，则NEF分别将上行外部业务链标识和下行外部业务链标识映射为上行内部业务链标识和下行内部业务链标识。
步骤703，NEF向UDR发送业务流信息，该业务流信息包括业务流描述信息、内部业务链标识和路由需求信息，以及还包括内部用户组标识或用于指示任意UE的指示信息。
步骤704，NEF向AF发送业务流影响建立响应消息。
步骤705，若PCF之前已经向UDR订阅了信息改变的通知，则UDR向PCF发送业务流信息。
该业务流信息即为NEF向UDR进行保存的业务流信息。
步骤706，UE建立PDU会话的流程。
该UE指的是前述描述的一组UE中的某个UE，或者是任意一个UE。
该流程中，UE请求建立PDU会话，网络为PDU选择PSAUPF，网络为UE分配地址。
可选的，该步骤706可以在步骤701之前执行。
步骤707，PCF确定PCC规则。
当上述步骤705中PCF收到的业务流信息中包含用于指示任意UE的指示信息，则在步骤706之后，PCF确定PCC规则。或者，当上述步骤705中PCF收到的业务流信息中包含内部用户组标识，且PCF确定该内部用户组标识指示的UE包括上述步骤706中建立 了PDU会话的UE，则在步骤706之后，PCF确定PCC规则。
该PCC规则包括业务流模板(SDF Template)、业务流导向策略标识(Traffic Steering Policy Id，TSP Id)和路由描述信息。
其中，业务流模板是PCF根据业务流描述信息确定的。
业务流导向策略标识是PCF根据内部业务链标识确定的。当内部业务链标识包括上行内部业务链标识和下行内部业务链标识，则PCF根据上行内部业务链标识确定上行业务流导向策略标识，以及根据下行内部业务链标识确定下行业务流导向策略标识，也即该PCC规则包括上行业务流导向策略标识和下行业务流导向策略标识。其中，业务流导向策略标识也称为N6局域网业务流导向策略标识(N6-LAN Traffic Steering Policy Id)。
路由描述信息包括至少一个DNAI以及每个DNAI对应的AF影响的业务流导向策略标识(AF-influenced Traffic Steering Policy Id)和/或N6路由信息(N6 routing Info)。其中，AF影响的业务流导向策略标识是PCF根据N6配置标识确定的。该N6路由信息即为上述步骤701中描述的N6路由信息。
步骤708至步骤712，同图6中的步骤605至步骤609。
图8为本申请实施例提供的一种通信方法的流程示意图，该方法中，针对一组UE或任意，AF在为UE访问的业务请求网络资源时，向核心网请求对业务进行业务链处理和业务流导向控制。
该方法包括以下步骤：
步骤801至步骤806，同图7中的步骤701至步骤706。
步骤807，AF向NEF发送请求消息，该请求消息包括业务流描述信息、外部业务链标识(external service function chain Id，externalSFC Id)和路由需求信息(routing requirement)。
当UE通过建立的PDU会话访问DN中的AF(即应用服务器)，AF决定为UE正在访问的应用请求网络资源以及业务增值服务，同时AF决定对访问应用的数据进行业务流导向控制(traffic steering control)到特定的DN，则AF向NEF发送该请求消息。
示例性地，该请求消息可以是Nnef_AFsessionWithQoS_Create请求消息。
其中，业务流描述信息用于描述业务流，比如可以是五元组信息。
该步骤807中的外部业务链标识和路由需求信息的含义，与步骤801中的外部业务链标识和路由需求信息的含义相同。
可选的，该请求消息还包括请求的QoS需求。
可选的，该请求消息可以包括多个外部业务链标识以及每个外部业务链标识对应的DNAI，表示在接入不同位置的DN时，请求执行不同的业务链。
步骤808，NEF向PCF发送策略授权建立请求消息，该策略授权建立请求消息包括业务流描述信息、内部业务链标识和路由需求信息。
NEF收到来自AF的请求消息后，对AF的请求进行授权，并将外部业务链标识映射为内部业务链标识，然后NEF向PCF发送该策略授权建立请求消息。
示例性地，该策略授权建立请求消息可以是Npcf_PolicyAuthorization_Create请求消息。
步骤809，PCF保存收到的信息，并向NEF返回策略授权建立响应消息。
可选的，当PCF对NEF的请求授权成功时，该策略授权建立响应消息包括用于指示接受请求的指示信息。
步骤810，NEF向AF发送响应消息。
示例性地，该响应消息可以是Nnef_AFsessionWithQoS_Create响应消息。
步骤811，PCF确定PCC规则。
PCF确定步骤805获得的信息和步骤808获得的信息可以同时应用于该UE的PDU会话，则PCF确定PCC规则。该PCC规则与图7的步骤707中的PCC规则相同，可以参考前述描述。
步骤812至步骤816，同图6中的步骤605至步骤609。
图9为本申请实施例提供的一种通信方法的流程示意图，该方法中，针对单个UE，AF在为UE访问的业务请求网络资源时，向核心网请求对业务进行业务链处理和业务流导向控制。
该方法包括以下步骤：
步骤901至步骤903，同图6的步骤601至步骤603。
步骤904，PCF确定PCC规则。
下面分三种情形，说明该PCC规则中包含的内容。
情形1，上述步骤602中PCF收到的路由需求信息包括至少一个DNAI以及每个DNAI对应的N6配置标识(N6 Profile ID)，则PCF根据步骤602收到的业务链标识和每个DNAI对应的该N6配置标识，确定每个DNAI对应的业务流导向策略标识，并且PCF根据步骤602收到的业务流描述信息确定业务流模板。因此，PCF确定的PCC规则中包含该业务流模板和路由描述信息，该路由描述信息包括至少一个DNAI以及每个DNAI对应的业务流导向策略标识。
情形2，上述步骤602中PCF收到的路由需求信息包括至少一个DNAI以及每个DNAI对应的N6配置标识(N6 Profile ID)和N6路由信息(N6 routing Info)，则PCF根据步骤602收到的业务链标识和每个DNAI对应的该N6配置标识，确定每个DNAI对应的业务流导向策略标识，并且PCF根据步骤602收到的业务流描述信息确定业务流模板。因此，PCF确定的PCC规则中包含该业务流模板和路由描述信息，该路由描述信息包括至少一个DNAI以及每个DNAI对应的业务流导向策略标识和N6路由信息。
情形3，上述步骤602中PCF收到的路由需求信息包括至少一个DNAI以及每个DNAI对应的N6路由信息(N6 routing Info)，则PCF根据步骤602收到的业务链标识确定业务流导向策略标识，并且PCF根据步骤602收到的业务流描述信息确定业务流模板。因此，PCF确定的PCC规则中包含该业务流模板、该业务流导向策略标识和路由描述信息，该路由描述信息包括至少一个DNAI以及每个DNAI对应的N6路由信息。
步骤905，PCF向SMF发送PCC规则。
例如，PCF向SMF发送Npcf_SMPolicyControl_UpdateNotify Request消息，该消息中包括PCC规则。
步骤906，SMF安装PCC规则后向PCF发送响应消息。
例如，该响应消息是Npcf_SMPolicyControl_UpdateNotify Response消息。
步骤907，SMF根据PCC规则确定N4规则。
SMF根据UE的位置信息、网络拓扑以及路由描述信息中的至少一个DNAI，确定UPF。该UPF可以是该至少一个DNAI对应的UPF中的与该UE最近的一个UPF。
SMF选择UPF后，根据PCC规则为该UPF确定N4规则。
该N4规则包括上行PDR和上行FAR，以及下行PDR和下行FAR。
其中，上行PDR用于匹配上行业务流，上行PDR中包括到来的数据包的源接口(Source Interface of incoming packet)，以及还包括业务数据流过滤器或应用标识，其中，到来的数据包的源接口的取值为Access(表示上行)，业务数据流过滤器可以是五元组信息。业务数据流过滤器或应用标识是根据PCC规则中的业务流模板确定的。
上行FAR可以通过以下三种方法中的任一种方法实现：
方法1，对应于上述步骤904的情形1，SMF根据上行业务流导向策略标识，确定上行转发策略标识(Forwarding Policy Id)。上行FAR中包括该上行转发策略标识。
其中，该上行业务流导向策略标识，与确定的UPF对应的DNAI存在对应关系。
方法2，对应于上述步骤904的情形2，SMF根据上行业务流导向策略标识，确定上行转发策略标识(Forwarding Policy Id)。上行FAR中包括该上行转发策略标识和N6路由信息。
其中，该上行业务流导向策略标识，与确定的UPF对应的DNAI存在对应关系。上行FAR中的N6路由信息，与确定的UPF对应的DNAI存在对应关系。
方法3，对应于上述步骤904的情形3，SMF根据上行业务流导向策略标识，确定上行转发策略标识(Forwarding Policy Id)。上行FAR中包括该上行转发策略标识和N6路由信息。
其中，上行FAR中的N6路由信息，与确定的UPF对应的DNAI存在对应关系。
下行PDR用于匹配下行业务流，下行PDR中包括到来的数据包的源接口(Source Interface of incoming packet)，以及还包括业务数据流过滤器或应用标识，其中，到来的数据包的源接口的取值为Core(表示下行)，业务数据流过滤器可以是五元组信息。业务数据流过滤器或应用标识是根据PCC规则中的业务流模板确定的。下行FAR包括下行转发策略标识，该下行转发策略标识是SMF根据下行业务流导向策略标识确定的。
步骤908，SMF向UPF发送N4规则。
比如，SMF在N4会话修改流程中，向UPF发送N4规则。
步骤909，UPF根据N4规则处理业务流的业务数据。
该步骤909的具体实现可以参考步骤609。
图10为本申请实施例提供的一种通信方法的流程示意图，该方法中，针对一组UE或任意，AF在为UE访问的业务请求网络资源时，向核心网请求对业务进行业务链处理和业务流导向控制。
该方法包括以下步骤：
步骤1001至步骤1006，同上述步骤701至步骤706。
步骤1007，PCF确定PCC规则。
当上述步骤1005中PCF收到的业务流信息中包含用于指示任意UE的指示信息，则在步骤1006之后，PCF确定PCC规则。或者，当上述步骤1005中PCF收到的业务流信息中包含内部用户组标识，且PCF确定该内部用户组标识指示的UE包括上述步骤1006中建立了PDU会话的UE，则在步骤1006之后，PCF确定PCC规则。
下面分三种情形，说明该PCC规则中包含的内容。
情形1，上述步骤1005中PCF收到的路由需求信息包括至少一个DNAI以及每个DNAI对应的N6配置标识(N6 Profile ID)，则PCF根据步骤1005收到的内部业务链标识和每个DNAI对应的该N6配置标识，确定每个DNAI对应的业务流导向策略标识，并且PCF 根据步骤1005收到的业务流描述信息确定业务流模板。因此，PCF确定的PCC规则中包含该业务流模板和路由描述信息，该路由描述信息包括至少一个DNAI以及每个DNAI对应的业务流导向策略标识。
情形2，上述步骤1005中PCF收到的路由需求信息包括至少一个DNAI以及每个DNAI对应的N6配置标识(N6 Profile ID)和N6路由信息(N6 routing Info)，则PCF根据步骤1005收到的内部业务链标识和每个DNAI对应的该N6配置标识，确定每个DNAI对应的业务流导向策略标识，并且PCF根据步骤1005收到的业务流描述信息确定业务流模板。因此，PCF确定的PCC规则中包含该业务流模板和路由描述信息，该路由描述信息包括至少一个DNAI以及每个DNAI对应的业务流导向策略标识和N6路由信息。
情形3，上述步骤1005中PCF收到的路由需求信息包括至少一个DNAI以及每个DNAI对应的N6路由信息(N6 routing Info)，则PCF根据步骤1005收到的内部业务链标识确定业务流导向策略标识，并且PCF根据步骤1005收到的业务流描述信息确定业务流模板。因此，PCF确定的PCC规则中包含该业务流模板、该业务流导向策略标识和路由描述信息，该路由描述信息包括至少一个DNAI以及每个DNAI对应的N6路由信息。
步骤1008至步骤1012，同上述步骤905至步骤909。
图11为本申请实施例提供的一种通信方法的流程示意图，该方法中，针对一组UE或任意，AF在为UE访问的业务请求网络资源时，向核心网请求对业务进行业务链处理和业务流导向控制。
该方法包括以下步骤：
步骤1101至步骤1110，同上述步骤801至步骤810。
步骤1111至步骤1116，同上述步骤1007至步骤1012。
图12为本申请实施例提供的一种通信方法的流程示意图。该方法包括以下步骤：
步骤1201，UPF确定与应用的业务数据匹配的第一包检测规则(第一PDR)。
UPF接收到应用的业务数据(比如上行业务数据)，然后UPF根据UPF上的多个PDR对该业务数据进行匹配，并确定一个PDR，该确定的PDR称为第一PDR。
该第一PDR包括到来的数据包的源接口(Source Interface of incoming packet)，以及还包括业务数据流过滤器或应用标识。其中，到来的数据包的源接口的取值为Access(表示上行)，业务数据流过滤器可以是五元组信息。业务数据流过滤器或应用标识是根据PCC规则中的业务流模板确定的。
步骤1202，UPF对该业务数据执行与第一包检测规则关联的第一转发动作规则对应的第一转发策略。
本申请实施例中，第一转发策略也称为第一路由策略，第一发送策略或第一传输策略等。
每个PDR关联一个转发动作规则(FAR).因此UPF确定与业务数据匹配的第一PDR之后，可以确定与该第一PDR关联的第一FAR，然后确定与该第一FAR对应的第一转发策略。
其中，UPF上预配置有多个转发策略，不同的FAR对应不同的转发策略。
作为一种实现方法，每个应用的数据流对应一个或多个PDR(根据不同的到来的数据包的源接口等信息可以有不同的PDR)。每个PDR关联一个FAR，每个FAR对应一个转发策略。因此UPF针对不同应用的业务数据，执行不同的转发策略。
UPF上配置的转发策略是应用与网络之间预先协商的策略或是根据运营商的策略预先配置的，不同应用与网络之间协商的转发策略可以相同，也可以不同。
第一转发策略用于对应用的业务数据执行局域网业务流导向。本申请实施例中，局域网业务流导向(local area network traffic steering)也称为N6局域网业务流导向(N6-LAN traffic steering)。经过部署在局域网的业务功能网元处理之后，UPF得到处理后的业务数据。
UPF对该业务数据第一转发策略，指的是将该应用的业务数据导向到局域网中的业务功能(servicefunction)网元，由业务功能网元对该应用的业务数据进行业务链处理。其中，这里的导向指的是发送。
步骤1203，UPF确定与经过部署在局域网的业务功能网元处理后的业务数据匹配的第二包检测规则(第二PDR)。
UPF接收到经过部署在局域网的业务功能网元处理后的业务数据，然后UPF根据UPF上的多个PDR对该业务数据进行匹配，并确定一个PDR，该确定的PDR称为第二PDR。
该第二PDR包括到来的数据包的源接口(Source Interface of incoming packet)，以及还包括业务数据流过滤器或应用标识，其中，到来的数据包的源接口的取值为N6-LAN(或SGi-LAN)，业务数据流过滤器可以是五元组信息。业务数据流过滤器或应用标识是根据PCC规则中的业务流模板确定的。
步骤1204，UPF对该经过部署在局域网的业务功能网元处理后的业务数据，执行与第二包检测规则关联的第二转发动作规则对应的第二转发策略。
第二转发策略用于对经过部署在局域网的业务功能网元处理后的业务数据执行数据网络路由业务流导向以将处理后的业务数据发送至本地数据网络，该本地数据网络是该应用的服务器所在的数据网络，因此将处理后的业务数据发送至本地数据网络，指的是将处理后的业务数据发送至本地数据网络中的该应用的服务器。
本申请实施例中，数据网络路由业务流导向也称为本地数据网络路由业务流导向、本地路由业务流导向或AF影响的业务流导向(AF-influenced traffic steering)。
其中，UPF对应用的业务数据执行局域网业务流导向，以及对经过部署在局域网的业务功能网元处理后的业务数据执行数据网络路由业务流导向以将处理后的业务数据发送至本地数据网络的具体示例，可以参考图3。
上述方案，UPF确定的第一转发策略，可以对业务数据执行局域网业务流导向，提升业务数据的传输质量和传输带宽。UPF确定的第二转发策略可以对经过部署在局域网的业务功能网元处理后的业务数据执行数据网络路由业务流导向，以将处理后的业务数据发送至本地数据网络，从而实现用户就近访问本地数据网络中的应用。该方案一方面提升业务数据的传输质量和传输带宽，另一方面实现用户就近访问本地数据包中的应用，从而提升业务数据的传输性能，从而可以提升用户体验。
该图12的实施例与前述图2的实施例的区别在于，该图12的实施例中，通过两个不同的FAR分别获取第一转发策略、第二转发策略，其中第一转发策略用于对应用的业务数据执行局域网业务流导向，第二转发策略用于对经过部署在局域网的业务功能网元处理后的业务数据执行数据网络路由业务流导向以将处理后的业务数据发送至本地数据网络，相应地，为了能够获得该两个FAR，UPF需要执行两次数据匹配操作，第一次是对应用的业务数据执行数据匹配，且匹配到第一PDR，该第一PDR关联第一FAR，第一FAR指示第一转发策略，第二次是对经过部署在局域网的业务功能网元处理后的业务数据执行数据匹 配，且匹配到第二PDR，该第二PDR关联第二FAR，第二FAR指示第二转发策略。而上述图2的实施例中，通过一个FAR获取一个转发策略，该转发策略既用于对应用的业务数据执行局域网业务流导向，还用于对经过部署在局域网的业务功能网元处理后的业务数据执行数据网络路由业务流导向以将处理后的业务数据发送至本地数据网络，相应地，为了能够获得该FAR，UPF执行一次数据匹配操作，对应用的业务数据执行数据匹配，且匹配到一个PDR，该PDR关联一个FAR，该FAR指示该转发策略。
下面对上述图12的实施例中的第一FAR、第二FAR，以及第一FAR与第一转发策略之间的关系、第二FAR与第二转发策略之间的关系给出两种不同实现方法，该两种方法分别对应图13(a)、图13(b)。
图13(a)为本申请实施例提供的一种通信方法的流程示意图。该方法中，SMF从PCF接收到一个局域网业务流导向策略标识，以及一个数据网络路由控制信息，然后SMF根据该一个局域网业务流导向策略标识确定第一转发动作规则，以及根据数据网络路由控制信息确定第二转发动作规则。
该方法包括以下步骤：
步骤1301a，PCF向SMF发送PCC规则。
该步骤1301a与上述步骤401a相同，其具体实现可以参考前述步骤401a。
该PCC规则中包含的内容分为以下三种情形，具体参考步骤401a。
步骤1302a，SMF根据局域网业务流导向策略标识确定第一转发动作规则(第一FAR)，以及根据数据网络路由控制信息确定第二转发动作规则(第二FAR)。
针对上述情形1，该步骤1302a具体为：SMF根据局域网业务流导向策略标识确定第一策略标识，然后根据第一策略标识确定第一FAR，该第一FAR包括第一策略标识，以及SMF从数据网络路由控制信息中的至少一个DNAI中确定目标DNAI，从至少一个DNAI对应的数据网络路由业务流导向策略标识中，确定目标DNAI对应的数据网络路由业务流导向策略标识，根据目标DNAI对应的数据网络路由业务流导向策略标识确定第二策略标识，然后SMF根据第二策略标识确定第二FAR，该第二FAR包括第二策略标识。结合该情形，则UPF收到第一FAR和第二FAR后，UPF根据以下方法确定转发策略：UPF根据第一FAR中的第一策略标识确定第一转发策略，根据第二FAR中的第二策略标识确定第二转发策略。
针对上述情形2，该步骤1302a具体为：SMF根据局域网业务流导向策略标识确定第一策略标识，然后根据第一策略标识确定第一FAR，该第一FAR包括第一策略标识，以及SMF从数据网络路由控制信息中的至少一个DNAI中确定目标DNAI，从至少一个DNAI对应的数据网络路由信息中，确定目标DNAI对应的数据网络路由信息，根据目标DNAI对应的数据网络路由信息确定第二FAR，该第二FAR包括目标DNAI对应的数据网络路由信息。一种实现方法中，该第二FAR包括Outer Header Creation参数，该Outer Header Creation参数包括目标DNAI对应的数据网络路由信息。结合该情形，则UPF收到第一FAR和第二FAR后，UPF根据以下方法确定转发策略：UPF根据第一FAR中的第一策略标识确定第一转发策略，根据第二FAR中的目标DNAI对应的数据网络路由信息确定第二转发策略。
针对上述情形3，该步骤1302a具体为：SMF根据局域网业务流导向策略标识确定第一策略标识，然后根据第一策略标识确定第一FAR，该第一FAR包括第一策略标识，以 及SMF从至少一个DNAI对应的数据网络路由业务流导向策略标识中，确定目标DNAI对应的数据网络路由业务流导向策略标识，从至少一个DNAI对应的数据网络路由信息中，确定目标DNAI对应的数据网络路由信息，SMF根据目标DNAI对应的数据网络路由业务流导向策略标识确定第二策略标识，然后SMF根据第二策略标识和目标DNAI对应的数据网络路由信息确定第二FAR，该第二FAR包括第二策略标识和目标DNAI对应的数据网络路由信息。一种实现方法中，该第二FAR包括第二策略标识和Outer Header Creation参数，该Outer Header Creation参数包括目标DNAI对应的数据网络路由信息。结合该情形，则UPF收到第一FAR和第二FAR后，UPF根据以下方法确定转发策略：UPF根据第一FAR中的第一策略标识确定第一转发策略，根据第二FAR中的第二策略标识和目标DNAI对应的数据网络路由信息确定第二转发策略。
步骤1303a，SMF向UPF发送第一转发动作规则和第二转发动作规则。
以及，SMF还向UPF发送与该第一转发动作规则关联的第一PDR，和与该第二转发动作规则关联的第二PDR。
该第一PDR包括到来的数据包的源接口(Source Interface of incoming packet)，以及还包括业务数据流过滤器或应用标识，其中，到来的数据包的源接口的取值为Access(表示上行)，业务数据流过滤器可以是五元组信息。业务数据流过滤器或应用标识是根据PCC规则中的业务流模板确定的。
该第二PDR包括到来的数据包的源接口(Source Interface of incoming packet)，以及还包括业务数据流过滤器或应用标识，其中，到来的数据包的源接口的取值为N6-LAN(或SGi-LAN)，业务数据流过滤器可以是五元组信息。业务数据流过滤器或应用标识是根据PCC规则中的业务流模板确定的。
可选的，在SMF在向UPF发送第一转发动作规则和第二转发动作规则之前，SMF确定UPF支持局域网业务流导向和数据网络路由业务流导向。若当前的UPF不支持局域网业务流导向和数据网络路由业务流导向，则SMF会选择一个支持的UPF，并且将业务数据分流到该UPF，或者重选一个UPF后将第一转发动作规则和第二转发动作规则发送给新选择的UPF。
上述方案，SMF向UPF发送的第一转发动作规则用于UPF先对业务数据执行局域网业务流导向，SMF向UPF发送的第二转发动作规则用于UPF对处理后的业务数据执行数据网络路由业务流导向，以实现用户就近访问本地数据网络中的应用。该方案一方面提升业务数据的传输质量和传输带宽，另一方面实现用户就近访问本地数据包中的应用，从而提升业务数据的传输性能，可以提升用户体验。
图13(b)为本申请实施例提供的一种通信方法的流程示意图。该方法中，SMF从PCF接收到至少两个局域网业务流导向策略标识，以及一个数据网络路由控制信息，然后SMF根据该至少两个局域网业务流导向策略标识以及一个数据网络路由控制信息，确定第一转发动作规则和第二转发动作规则。
该方法包括以下步骤：
步骤1301b，PCF向SMF发送PCC规则。
该步骤1301b与上述步骤401b相同，其具体实现可以参考前述步骤401b。
该PCC规则中包含的内容分为以下三种情形，具体参考步骤401b。
步骤1302b，SMF根据至少两个DNAI分别对应的局域网业务流导向策略标识，确定 第一转发动作规则(第一FAR)，以及根据数据网络路由控制信息确定第二转发动作规则(第二FAR)。
针对上述情形1，该步骤1302b具体是：SMF从数据网络路由控制信息中的至少两个DNAI中确定目标DNAI，然后SMF从至少两个DNAI对应的局域网业务流导向策略标识中，确定目标DNAI对应的局域网业务流导向策略标识，SMF根据目标DNAI对应的局域网业务流导向策略标识确定第一策略标识，然后根据第一策略标识确定第一FAR，该第一FAR包括第一策略标识，以及SMF从至少两个DNAI分别对应的数据网络路由业务流导向策略标识中确定目标DNAI对应的数据网络路由业务流导向策略标识，根据目标DNAI对应的数据网络路由业务流导向策略标识，确定第二策略标识，然后SMF根据第二策略标识确定第二FAR，该第二FAR包括第二策略标识。结合该情形，则UPF收到第一FAR和第二FAR后，UPF根据以下方法确定转发策略：UPF根据第一FAR中的第一策略标识确定第一转发策略，根据第二FAR中的第二策略标识确定第二转发策略。
针对上述情形2，该步骤1302b具体是：SMF从数据网络路由控制信息中的至少两个DNAI中确定目标DNAI，然后SMF从至少两个DNAI对应的局域网业务流导向策略标识中，确定目标DNAI对应的局域网业务流导向策略标识，然后SMF根据目标DNAI对应的局域网业务流导向策略标识确定第一策略标识，然后根据第一策略标识确定第一FAR，该第一FAR包括第一策略标识，以及SMF从至少两个DNAI分别对应的数据网络路由信息中确定目标DNAI对应的数据网络路由信息，然后SMF根据目标DNAI对应的数据网络路由信息确定第二FAR，该第二FAR包括目标DNAI对应的数据网络路由信息。一种实现方法中，该第二FAR包括Outer Header Creation参数，该Outer Header Creation参数包括目标DNAI对应的数据网络路由信息。结合该情形，则UPF收到第一FAR和第二FAR后，UPF根据以下方法确定转发策略：UPF根据第一FAR中的第一策略标识确定第一转发策略，根据第二FAR中的目标DNAI对应的数据网络路由信息确定第二转发策略。
针对上述情形3，该步骤1302b具体是：SMF从数据网络路由控制信息中的至少两个DNAI中确定目标DNAI，然后SMF从至少两个DNAI对应的局域网业务流导向策略标识中，确定目标DNAI对应的局域网业务流导向策略标识，然后SMF根据目标DNAI对应的局域网业务流导向策略标识确定第一策略标识，然后根据第一策略标识确定第一FAR，该第一FAR包括第一策略标识，以及SMF从至少一个DNAI对应的数据网络路由业务流导向策略标识中，确定目标DNAI对应的数据网络路由业务流导向策略标识，从至少一个DNAI对应的数据网络路由信息中，确定目标DNAI对应的数据网络路由信息，SMF根据目标DNAI对应的数据网络路由业务流导向策略标识确定第二策略标识，然后SMF根据第二策略标识和目标DNAI对应的数据网络路由信息确定第二FAR，该第二FAR包括第二策略标识和目标DNAI对应的数据网络路由信息。一种实现方法中，该第二FAR包括第二策略标识和Outer Header Creation参数，该Outer Header Creation参数包括目标DNAI对应的数据网络路由信息。结合该情形，则UPF收到第一FAR和第二FAR后，UPF根据以下方法确定转发策略：UPF根据第一FAR中的第一策略标识确定第一转发策略，根据第二FAR中的第二策略标识和目标DNAI对应的数据网络路由信息确定第二转发策略。
步骤1303b，SMF向UPF发送第一转发动作规则和第二转发动作规则。
以及，SMF还向UPF发送与该第一转发动作规则关联的第一PDR，和与该第二转发动作规则关联的第二PDR。
该第一PDR包括到来的数据包的源接口(Source Interface of incoming packet)，以及还包括业务数据流过滤器或应用标识，其中，到来的数据包的源接口的取值为Access(表示上行)，业务数据流过滤器可以是五元组信息。业务数据流过滤器或应用标识是根据PCC规则中的业务流模板确定的。
该第二PDR包括到来的数据包的源接口(Source Interface of incoming packet)，以及还包括业务数据流过滤器或应用标识，其中，到来的数据包的源接口的取值为N6-LAN(或SGi-LAN)，业务数据流过滤器可以是五元组信息。业务数据流过滤器或应用标识是根据PCC规则中的业务流模板确定的。
可选的，在SMF在向UPF发送第一转发动作规则和第二转发动作规则之前，SMF确定UPF支持局域网业务流导向和数据网络路由业务流导向。若当前的UPF不支持局域网业务流导向和数据网络路由业务流导向，则SMF会选择一个支持的UPF，并且将业务数据分流到该UPF，或者重选一个UPF后将第一转发动作规则和第二转发动作规则发送给新选择的UPF。
上述方案，SMF向UPF发送的第一转发动作规则用于UPF先对业务数据执行局域网业务流导向，SMF向UPF发送的第二转发动作规则用于UPF对处理后的业务数据执行数据网络路由业务流导向，以实现用户就近访问本地数据网络中的应用。该方案一方面提升业务数据的传输质量和传输带宽，另一方面实现用户就近访问本地数据包中的应用，从而提升业务数据的传输性能，可以提升用户体验。并且，该方案可以提供多个局域网业务流导向策略标识，并从多个局域网业务流导向策略标识选择使用的局域网业务流导向策略标识，有助于提升转发策略的准确性，进而提升业务数据发送速度和准确性，进一步提升用户体验。
下面结合图14至图16所示的具体示例，对上述图12、图13(a)以及图13(b)的实施例进行具体说明。
需要说明的是，以下实施例中的N6配置标识(N6 Profile ID)与前述实施例中的配置标识的含义相同，以下实施例中的N6路由信息(N6 routing Info)与前述实施例中的数据网络路由信息的含义相同，以下实施例中的业务流导向策略标识与前述实施例中的局域网业务流导向策略标识、业务流导向策略标识的含义相同，以下实施例中的AF影响的业务流导向策略标识与前述实施例中的数据网络路由业务流导向策略标识的含义相同，以下实施例中的本地策略与前述实施例中的转发策略的含义相同。
图14为本申请实施例提供的一种通信方法的流程示意图。该方法中，针对单个UE，AF在为UE访问的业务请求网络资源时，向核心网请求对业务进行业务链处理和业务流导向控制。
该方法包括以下步骤：
步骤1401至步骤1406，同图6实施例中的步骤601至步骤606。
步骤1407，SMF根据PCC规则确定N4规则。
SMF根据UE的位置信息、网络拓扑以及路由描述信息中的至少一个DNAI，确定UPF。该UPF可以是该至少一个DNAI对应的UPF中的与该UE最近的一个UPF。
SMF选择UPF后，根据PCC规则为该UPF确定N4规则。
该N4规则包括上行包检测规则(上行PDR)和上行转发动作规则(上行FAR)，以及还包括下行PDR和下行FAR。
其中，上行PDR用于匹配上行业务流。上行PDR包括第一PDR和第二PDR，上行FAR包括第一FAR和第二FAR。并且，第一PDR与第一FAR关联，第二PDR与第二FAR关联。
其中，该第一PDR包括到来的数据包的源接口(Source Interface of incoming packet)，以及还包括业务数据流过滤器或应用标识，其中，到来的数据包的源接口的取值为Access(表示上行)，业务数据流过滤器可以是五元组信息。业务数据流过滤器或应用标识是根据PCC规则中的业务流模板确定的。
该第二PDR包括到来的数据包的源接口(Source Interface of incoming packet)，以及还包括业务数据流过滤器或应用标识，其中，到来的数据包的源接口的取值为N6-LAN(或SGi-LAN)，业务数据流过滤器可以是五元组信息。业务数据流过滤器或应用标识是根据PCC规则中的业务流模板确定的。
第一FAR、第二FAR可以通过以下三种方法中的任一种方法实现：
方法1，SMF根据上行业务流导向策略标识确定第一策略标识，然后根据第一策略标识确定第一FAR，该第一FAR包括第一策略标识，以及SMF从数据网络路由控制信息中的至少一个DNAI中确定目标DNAI，从至少一个DNAI对应的AF影响的业务流导向策略标识中，确定目标DNAI对应的AF影响的业务流导向策略标识，根据目标DNAI对应的AF影响的业务流导向策略标识确定第二策略标识，然后SMF根据第二策略标识确定第二FAR，该第二FAR包括第二策略标识。其中，用于确定第一策略标识的AF影响的业务流导向策略标识，与确定的UPF对应的DNAI存在对应关系。
结合该情形，则UPF收到第一FAR和第二FAR后，UPF根据以下方法确定转发策略：UPF根据第一FAR中的第一策略标识确定第一转发策略，根据第二FAR中的第二策略标识确定第二转发策略。
方法2，SMF根据上行业务流导向策略标识确定第一策略标识，然后根据第一策略标识确定第一FAR，该第一FAR包括第一策略标识，以及SMF从数据网络路由控制信息中的至少一个DNAI中确定目标DNAI，从至少一个DNAI对应的N6路由信息中，确定目标DNAI对应的N6路由信息，根据目标DNAI对应的N6路由信息确定第二FAR，该第二FAR包括目标DNAI对应的N6路由信息。一种实现方法中，该第二FAR包括Outer Header Creation参数，该Outer Header Creation参数包括目标DNAI对应的N6路由信息。其中，第二FAR中的N6路由信息，与确定的UPF对应的DNAI存在对应关系。
结合该情形，则UPF收到第一FAR和第二FAR后，UPF根据以下方法确定转发策略：UPF根据第一FAR中的第一策略标识确定第一转发策略，根据第二FAR中的目标DNAI对应的N6路由信息确定第二转发策略。
方法3，SMF根据上行业务流导向策略标识确定第一策略标识，然后根据第一策略标识确定第一FAR，该第一FAR包括第一策略标识，以及SMF从至少一个DNAI对应的AF影响的业务流导向策略标识中，确定目标DNAI对应的AF影响的业务流导向策略标识，从至少一个DNAI对应的N6路由信息中，确定目标DNAI对应的N6路由信息，SMF根据目标DNAI对应的AF影响的业务流导向策略标识确定第二策略标识，然后SMF根据第二策略标识和目标DNAI对应的N6路由信息确定第二FAR，该第二FAR包括第二策略标识和目标DNAI对应的N6路由信息。一种实现方法中，该第二FAR包括第二策略标识和Outer Header Creation参数，该Outer Header Creation参数包括目标DNAI对应的N6路由 信息。其中，用于确定第二策略标识的AF影响的业务流导向策略标识，与确定的UPF对应的DNAI存在对应关系。第二FAR中的N6路由信息，与确定的UPF对应的DNAI存在对应关系。
结合该情形，则UPF收到第一FAR和第二FAR后，UPF根据以下方法确定转发策略：UPF根据第一FAR中的第一策略标识确定第一转发策略，根据第二FAR中的第二策略标识和目标DNAI对应的N6路由信息确定第二转发策略。
下行PDR用于匹配下行业务流，下行PDR中包括到来的数据包的源接口(Source Interface of incoming packet)，以及还包括业务数据流过滤器或应用标识，其中，到来的数据包的源接口的取值为Core(表示下行)，业务数据流过滤器可以是五元组信息。下行FAR包括下行转发策略标识，该下行转发策略标识是SMF根据下行业务流导向策略标识确定的。
步骤1408，SMF向UPF发送N4规则。
比如，SMF在N4会话修改流程中，向UPF发送N4规则。
步骤1409，UPF根据N4规则处理业务流的业务数据。
针对上行业务数据，当UPF根据第一PDR匹配到应用的上行业务数据时，UPF确定该第一PDR对应的第一FAR，并执行该第一FAR对应的本地策略(也称为第一转发策略)，该本地策略为：UPF对应用的业务数据执行局域网业务流导向，也即将上行业务数据发送到该本地策略对应的部署在局域网的业务链的业务功能(Service Function)网元进行处理。然后UPF接收经过部署在局域网的业务功能网元处理后的业务数据，且UPF根据第二PDR匹配到该处理后的业务数据，UPF确定该第二PDR对应的第二FAR，并执行该第二FAR对应的本地策略(也称为第二转发策略)，该本地策略为：对经过部署在局域网的业务功能网元处理后的业务数据执行数据网络路由业务流导向以将处理后的业务数据发送至本地数据网络。其中，该本地数据网络是该应用的服务器所在的数据网络，因此将处理后的业务数据发送至本地数据网络，指的是将处理后的业务数据发送至本地数据网络中的该应用的服务器(AF)。
针对下行业务数据，当UPF根据下行PDR匹配到应用的下行业务数据时，UPF确定该下行PDR对应的下行转发策略标识，并执行该下行转发策略标识对应的本地策略，该本地策略为：UPF将下行业务数据发送到该本地策略对应的业务功能(Service Function)进行处理得到处理后的下行业务数据，然后UPF将处理后的下行业务数据发送基站或其它UPF。
上述方案，由于UPF收到的第一FAR对应的本地策略支持业务流的业务链路由，UPF收到的第二FAR对应的本地策略支持将业务流导向到DN，因此UPF可以根据第一FAR和第二FAR对上行业务流执行业务链处理和业务流导向控制，提升了上行业务流的处理效率，可以提升用户体验。
图15为本申请实施例提供的一种通信方法的流程示意图，该方法中，针对一组UE或任意，AF在为UE访问的业务请求网络资源时，向核心网请求对业务进行业务链处理和业务流导向控制。
该方法包括以下步骤：
步骤1501至步骤1507，同图7中的步骤701至步骤707。
步骤1508至步骤1512，同图14中的步骤1405至步骤1409。
图16为本申请实施例提供的一种通信方法的流程示意图，该方法中，针对一组UE或任意，AF在为UE访问的业务请求网络资源时，向核心网请求对业务进行业务链处理和业务流导向控制。
该方法包括以下步骤：
步骤1601至步骤1611，同图8中的步骤801至步骤811。
步骤1612至步骤1616，同图14中的步骤1405至步骤1409。
可以理解的是，为了实现上述实施例中功能，用户面网元、会话管理网元或策略控制网元包括了执行各个功能相应的硬件结构和/或软件模块。本领域技术人员应该很容易意识到，结合本申请中所公开的实施例描述的各示例的单元及方法步骤，本申请能够以硬件或硬件和计算机软件相结合的形式来实现。某个功能究竟以硬件还是计算机软件驱动硬件的方式来执行，取决于技术方案的特定应用场景和设计约束条件。
图17和图18为本申请的实施例提供的可能的通信装置的结构示意图。这些通信装置可以用于实现上述方法实施例中用户面网元、会话管理网元或策略控制网元的功能，因此也能实现上述方法实施例所具备的有益效果。在本申请的实施例中，该通信装置可以是用户面网元、会话管理网元或策略控制网元，也可以是应用于用户面网元、会话管理网元或策略控制网元的模块(如芯片)。
图17所示的通信装置1700包括处理单元1710和收发单元1720。通信装置1700用于实现上述方法实施例中用户面网元、会话管理网元或策略控制网元的功能。
当通信装置1700用于实现上述方法实施例中用户面网元的功能，处理单元1710，用于确定与应用的业务数据匹配的包检测规则，并确定该包检测规则对应的转发动作规则；以及对该业务数据执行该转发动作规则对应的转发策略，该转发策略用于对该业务数据执行局域网业务流导向，以及对经过部署在局域网的业务功能网元处理后的业务数据执行数据网络路由业务流导向以将该处理后的业务数据发送至本地数据网络。
一种实现方法中，该转发动作规则包括转发策略标识，该转发策略标识是根据该应用的局域网业务流导向策略标识和该应用的数据网络路由业务流导向策略标识确定的；其中，该应用的局域网业务流导向策略标识用于对该业务数据执行局域网业务流导向，该应用的数据网络路由业务流导向策略标识用于对该业务数据执行数据网络路由业务流导向，该应用的数据网络路由业务流导向策略标识与该本地数据网络的数据网络接入标识DNAI对应。
一种实现方法中，处理单元1710，还用于根据该转发策略标识，获取该转发策略。
一种实现方法中，该转发动作规则包括转发策略标识和数据网络路由信息，该转发策略标识是根据该应用的局域网业务流导向策略标识确定的；其中，该应用的局域网业务流导向策略标识用于对该业务数据执行局域网业务流导向，该数据网络路由信息用于对该业务数据执行数据网络路由业务流导向，该数据网络路由信息包括该应用的服务器的地址、端口号或协议号中的至少一个，该数据网络路由信息与该本地数据网络的DNAI对应。
一种实现方法中，该转发动作规则包括转发策略标识和数据网络路由信息，该转发策略标识是根据该应用的局域网业务流导向策略标识和该应用的数据网络路由业务流导向策略标识确定的；其中，该应用的局域网业务流导向策略标识用于对该业务数据执行局域网业务流导向，该应用的数据网络路由业务流导向策略标识和该数据网络路由信息均用于对该业务数据执行数据网络路由业务流导向，该应用的数据网络路由业务流导向策略标识和该数据网络路由信息均与该本地数据网络的DNAI对应，该数据网络路由信息包括该应 用的服务器的地址、端口号或协议号中的至少一个。
一种实现方法中，处理单元1710，还用于根据该转发策略标识和该数据网络路由信息，获取该转发策略。
当通信装置1700用于实现上述方法实施例中会话管理网元的功能，收发单元1720，用于接收PCC规则，该PCC规则包括应用的局域网业务流导向策略标识和数据网络路由控制信息，该数据网络路由控制信息包括至少一个数据网络接入标识DNAI以及该至少一个DNAI分别对应的数据网络路由业务流导向策略标识和/或数据网络路由信息，该局域网业务流导向策略标识用于对该应用的业务数据执行局域网业务流导向，该数据网络路由业务流导向策略标识和该数据网络路由信息均用于对该应用的业务数据执行数据网络路由业务流导向，该数据网络路由信息包括该应用的服务器的地址、端口号或协议号中的至少一个；处理单元1710，用于根据该局域网业务流导向策略标识和该数据网络路由控制信息，确定转发动作规则；收发单元1720，还用于向用户面网元发送该转发动作规则。
一种实现方法中，处理单元1710，具体用于确定该至少一个DNAI中的目标DNAI，该用户面网元对应该目标DNAI；根据该局域网业务流导向策略标识和该目标DNAI对应的数据网络路由业务流导向策略标识，确定转发策略标识；其中，该转发动作规则包括该转发策略标识。
一种实现方法中，该转发动作规则还包括该目标DNAI对应的数据网络路由信息。
一种实现方法中，处理单元1710，具体用于确定该至少一个DNAI中的目标DNAI，该用户面网元对应该目标DNAI；根据该局域网业务流导向策略标识，确定转发策略标识；其中，该转发动作规则包括该转发策略标识和该目标DNAI对应的数据网络路由信息。
当通信装置1700用于实现上述方法实施例中会话管理网元的功能，收发单元1720，用于接收PCC规则，该PCC规则包括数据网络路由控制信息和至少两个数据网络接入标识DNAI分别对应的局域网业务流导向策略标识，该数据网络路由控制信息包括该至少两个DNAI以及该至少两个DNAI分别对应的数据网络路由业务流导向策略标识和/或数据网络路由信息，该局域网业务流导向策略标识用于对应用的业务数据执行局域网业务流导向，该数据网络路由业务流导向策略标识和该数据网络路由信息均用于对该应用的业务数据执行数据网络路由业务流导向，该数据网络路由信息包括该应用的服务器的地址、端口号或协议号中的至少一个；处理单元1710，用于根据该数据网络路由控制信息和该至少两个DNAI分别对应的局域网业务流导向策略标识，确定转发动作规则；收发单元1720，还用于向用户面网元发送该转发动作规则。
一种实现方法中，处理单元1710，具体用于确定该至少两个DNAI中的目标DNAI，该用户面网元对应该目标DNAI；根据该目标DNAI对应的局域网业务流导向策略标识和该目标DNAI对应的数据网络路由业务流导向策略标识，确定转发策略标识；其中，该转发动作规则包括该转发策略标识。
一种实现方法中，该转发动作规则还包括该目标DNAI对应的数据网络路由信息。
一种实现方法中，处理单元1710，具体用于确定该至少两个DNAI中的目标DNAI，该用户面网元对应该目标DNAI；根据该目标DNAI对应的局域网业务流导向策略标识，确定转发策略标识；其中，该转发动作规则包括该转发策略标识和该目标DNAI对应的数据网络路由信息。
当通信装置1700用于实现上述方法实施例中策略控制网元的功能，收发单元1720， 用于接收业务链标识、至少一个DNAI以及该至少一个DNAI分别对应的配置标识，该业务链标识指示一个业务链，该业务链用于对应用的业务数据执行业务链处理，该配置标识用于对该应用的业务数据执行数据网络路由业务流导向；处理单元1710，用于根据该业务链标识和该至少一个DNAI分别对应的配置标识，确定该至少一个DNAI分别对应的局域网业务流导向策略标识，其中，该至少一个DNAI分别对应的配置标识与该至少一个DNAI分别对应的业务流导向策略标识一一对应，该局域网业务流导向策略标识用于对该应用的业务数据执行局域网业务流导向和对该应用的业务数据执行数据网络路由业务流导向；收发单元1720，还用于向会话管理网元发送该PCC规则，该PCC规则包括该至少一个DNAI以及该至少一个DNAI分别对应的业务流导向策略标识。
一种实现方法中，收发单元1720，还用于接收该至少一个DNAI分别对应的数据网络路由信息，该数据网络路由信息用于对该应用的业务数据执行数据网络路由业务流导向，该数据网络路由信息包括该应用的服务器的地址、端口号或协议号中的至少一个；该PCC规则还包括该至少一个DNAI分别对应的数据网络路由信息。
当通信装置1700用于实现上述方法实施例中策略控制网元的功能，收发单元1720，用于接收至少两个DNAI，以及该至少两个DNAI分别对应的配置标识和业务链标识，该业务链标识指示一个业务链，该业务链用于对应用的业务数据执行业务链处理，该配置标识用于对该应用的业务数据执行数据网络路由业务流导向；处理单元1710，用于根据该至少两个DNAI分别对应的业务链标识和配置标识，确定该至少两个DNAI分别对应的业务流导向策略标识，其中，该至少两个DNAI分别对应的配置标识和业务链标识均与该至少两个DNAI分别对应的业务流导向策略标识一一对应，该局域网业务流导向策略标识用于对该应用的业务数据执行局域网业务流导向和对该应用的业务数据执行数据网络路由业务流导向；收发单元1720，还用于向会话管理网元发送该PCC规则，该PCC规则包括该至少两个DNAI以及该至少两个DNAI分别对应的业务流导向策略标识。
一种实现方法中，收发单元1720，还用于接收该至少两个DNAI分别对应的数据网络路由信息，该数据网络路由信息用于对该应用的业务数据执行数据网络路由业务流导向，该数据网络路由信息包括该应用的服务器的地址、端口号或协议号中的至少一个；该PCC规则还包括该至少两个DNAI分别对应的数据网络路由信息。
当通信装置1700用于实现上述方法实施例中用户面网元的功能，处理单元1710，用于确定与应用的业务数据匹配的第一包检测规则；对该业务数据执行与该第一包检测规则关联的第一转发动作规则对应的第一转发策略，该第一转发策略用于对该业务数据执行局域网业务流导向；确定与经过部署在局域网的业务功能网元处理后的业务数据匹配的第二包检测规则；对该处理后的业务数据执行与该第二包检测规则关联的第二转发动作规则对应的第二转发策略，该第二转发策略用于对该处理后的业务数据执行数据网络路由业务流导向以将该处理后的业务数据发送至本地数据网络。
一种可能的实现方法中，该第一转发动作规则包括第一策略标识，该第一策略标识是根据该应用的局域网业务流导向策略标识确定的；其中，该应用的局域网业务流导向策略标识用于对该业务数据执行局域网业务流导向。
一种可能的实现方法中，处理单元1710，还用于根据该第一策略标识，获取该第一转发策略。
一种可能的实现方法中，该第二转发动作规则包括第二策略标识和/或数据网络路由信 息，该第二策略标识是根据该应用的数据网络路由业务流导向策略标识确定的，该应用的数据网络路由业务流导向策略标识用于对该业务数据执行数据网络路由业务流导向，该数据网络路由信息用于对该业务数据执行数据网络路由业务流导向，该数据网络路由信息包括该应用的服务器的地址、端口号或协议号中的至少一个，该应用的数据网络路由业务流导向策略标识、该数据网络路由信息均与该本地数据网络的数据网络接入标识DNAI对应。
一种可能的实现方法中，处理单元1710，还用于根据该第二策略标识和/或该数据网络路由信息，获取该第二转发策略。
当通信装置1700用于实现上述方法实施例中会话管理网元的功能，收发单元1720，用于接收PCC规则，该PCC规则包括应用的局域网业务流导向策略标识和数据网络路由控制信息，该数据网络路由控制信息包括至少一个数据网络接入标识DNAI以及该至少一个DNAI分别对应的数据网络路由业务流导向策略标识和/或数据网络路由信息，该局域网业务流导向策略标识用于对该应用的业务数据执行局域网业务流导向，该数据网络路由业务流导向策略标识和该数据网络路由信息均用于对该应用的业务数据执行数据网络路由业务流导向，该数据网络路由信息包括该应用的服务器的地址、端口号或协议号中的至少一个；处理单元1710，用于根据该局域网业务流导向策略标识，确定第一转发动作规则；根据该数据网络路由控制信息，确定第二转发动作规则；收发单元1720，还用于向用户面网元发送该第一转发动作规则和该第二转发动作规则。
一种可能的实现方法中，处理单元1710，具体用于根据该局域网业务流导向策略标识，确定第一策略标识，该第一策略标识用于指示第一转发策略；其中，该第一转发动作规则包括该第一策略标识。
一种可能的实现方法中，该数据网络路由控制信息包括至少一个DNAI以及该至少一个DNAI分别对应的数据网络路由业务流导向策略标识；处理单元1710，具体用于确定该至少一个DNAI中的目标DNAI，该用户面网元对应该目标DNAI；根据该目标DNAI对应的数据网络路由业务流导向策略标识，确定第二策略标识，该第二策略标识用于指示第二转发策略；其中，该第二转发动作规则包括该第二策略标识。
一种可能的实现方法中，该数据网络路由控制信息包括至少一个数据网络接入标识DNAI以及该至少一个DNAI分别对应的数据网络路由信息；处理单元1710，具体用于确定该至少一个DNAI中的目标DNAI，该用户面网元对应该目标DNAI；其中，该第二转发动作规则包括该目标DNAI对应的数据网络路由信息，该目标DNAI对应的数据网络路由信息用于指示第二转发策略。
一种可能的实现方法中，该数据网络路由控制信息包括至少一个数据网络接入标识DNAI以及该至少一个DNAI分别对应的数据网络路由业务流导向策略标识和数据网络路由信息；处理单元1710，具体用于确定该至少一个DNAI中的目标DNAI，该用户面网元对应该目标DNAI；根据该目标DNAI对应的数据网络路由业务流导向策略标识，确定第二策略标识；其中，该第二转发动作规则包括该第二策略标识和该目标DNAI对应的数据网络路由信息，该第二策略标识和该目标DNAI对应的数据网络路由信息用于指示第二转发策略。
当通信装置1700用于实现上述方法实施例中会话管理网元的功能，收发单元1720，用于接收PCC规则，该PCC规则包括数据网络路由控制信息和至少两个数据网络接入标识DNAI分别对应的局域网业务流导向策略标识，该数据网络路由控制信息包括该至少两 个DNAI以及该至少两个DNAI分别对应的数据网络路由业务流导向策略标识和/或数据网络路由信息，该局域网业务流导向策略标识用于对应用的业务数据执行局域网业务流导向，该数据网络路由业务流导向策略标识和该数据网络路由信息均用于对该应用的业务数据执行数据网络路由业务流导向，该数据网络路由信息包括该应用的服务器的地址、端口号或协议号中的至少一个；处理单元1710，用于根据该至少两个DNAI分别对应的局域网业务流导向策略标识，确定第一转发动作规则；根据该数据网络路由控制信息，确定第二转发动作规则；收发单元1720，还用于向用户面网元发送该第一转发动作规则和该第二转发动作规则。
一种可能的实现方法中，处理单元1710，具体用于确定该至少两个DNAI中的目标DNAI，该用户面网元对应该目标DNAI；根据该目标DNAI对应的局域网业务流导向策略标识，确定第一策略标识，该第一策略标识用于指示第一转发策略；其中，该第一转发动作规则包括该第一策略标识。
一种可能的实现方法中，该数据网络路由控制信息包括至少一个DNAI以及该至少一个DNAI分别对应的数据网络路由业务流导向策略标识；处理单元1710，具体用于确定该至少一个DNAI中的目标DNAI，该用户面网元对应该目标DNAI；根据该目标DNAI对应的数据网络路由业务流导向策略标识，确定第二策略标识，该第二策略标识用于指示第二转发策略；其中，该第二转发动作规则包括该第二策略标识。
一种可能的实现方法中，该数据网络路由控制信息包括至少一个数据网络接入标识DNAI以及该至少一个DNAI分别对应的数据网络路由信息；处理单元1710，具体用于确定该至少一个DNAI中的目标DNAI，该用户面网元对应该目标DNAI；其中，该第二转发动作规则包括该目标DNAI对应的数据网络路由信息，该目标DNAI对应的数据网络路由信息用于指示第二转发策略。
一种可能的实现方法中，该数据网络路由控制信息包括至少一个数据网络接入标识DNAI以及该至少一个DNAI分别对应的数据网络路由业务流导向策略标识和数据网络路由信息；处理单元1710，具体用于确定该至少一个DNAI中的目标DNAI，该用户面网元对应该目标DNAI；根据该目标DNAI对应的数据网络路由业务流导向策略标识，确定第二策略标识；其中，该第二转发动作规则包括该第二策略标识和该目标DNAI对应的数据网络路由信息，该第二策略标识和该目标DNAI对应的数据网络路由信息用于指示第二转发策略。
有关上述处理单元1710和收发单元1720更详细的描述可以直接参考上述方法实施例中相关描述直接得到，这里不加赘述。
图18所示的通信装置1800包括处理器1810和接口电路1820。处理器1810和接口电路1820之间相互耦合。可以理解的是，接口电路1820可以为收发器或输入输出接口。可选的，通信装置1800还可以包括存储器1830，用于存储处理器1810执行的指令或存储处理器1810运行指令所需要的输入数据或存储处理器1810运行指令后产生的数据。
当通信装置1800用于实现上述方法实施例时，处理器1810用于实现上述处理单元1710的功能，接口电路1820用于实现上述收发单元1720的功能。
可以理解的是，本申请的实施例中的处理器可以是中央处理单元(Central Processing Unit，CPU)，还可以是其它通用处理器、数字信号处理器(Digital Signal Processor，DSP)、专用集成电路(Application Specific Integrated Circuit，ASIC)、现场可编程门阵列(Field  Programmable Gate Array，FPGA)或者其它可编程逻辑器件、晶体管逻辑器件，硬件部件或者其任意组合。通用处理器可以是微处理器，也可以是任何常规的处理器。
本申请的实施例中的方法步骤可以通过硬件的方式来实现，也可以由处理器执行软件指令的方式来实现。软件指令可以由相应的软件模块组成，软件模块可以被存放于随机存取存储器、闪存、只读存储器、可编程只读存储器、可擦除可编程只读存储器、电可擦除可编程只读存储器、寄存器、硬盘、移动硬盘、CD-ROM或者本领域熟知的任何其它形式的存储介质中。一种示例性的存储介质耦合至处理器，从而使处理器能够从该存储介质读取信息，且可向该存储介质写入信息。当然，存储介质也可以是处理器的组成部分。处理器和存储介质可以位于ASIC中。另外，该ASIC可以位于基站或终端设备中。当然，处理器和存储介质也可以作为分立组件存在于基站或终端设备中。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机程序或指令。在计算机上加载和执行所述计算机程序或指令时，全部或部分地执行本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、基站、用户设备或者其它可编程装置。所述计算机程序或指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机程序或指令可以从一个网站站点、计算机、服务器或数据中心通过有线或无线方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是集成一个或多个可用介质的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质，例如，软盘、硬盘、磁带；也可以是光介质，例如，数字视频光盘；还可以是半导体介质，例如，固态硬盘。该计算机可读存储介质可以是易失性或非易失性存储介质，或可包括易失性和非易失性两种类型的存储介质。
在本申请的各个实施例中，如果没有特殊说明以及逻辑冲突，不同的实施例之间的术语和/或描述具有一致性、且可以相互引用，不同的实施例中的技术特征根据其内在的逻辑关系可以组合形成新的实施例。
本申请中，“至少一个”是指一个或者多个，“多个”是指两个或两个以上。“和/或”，描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B的情况，其中A，B可以是单数或者复数。在本申请的文字描述中，字符“/”，一般表示前后关联对象是一种“或”的关系；在本申请的公式中，字符“/”，表示前后关联对象是一种“相除”的关系。
可以理解的是，在本申请的实施例中涉及的各种数字编号仅为描述方便进行的区分，并不用来限制本申请的实施例的范围。上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定。

Claims (66)

  1. 一种通信方法，其特征在于，包括：
    用户面网元确定与应用的业务数据匹配的包检测规则；
    所述用户面网元对所述业务数据执行与所述包检测规则关联的转发动作规则对应的转发策略，所述转发策略用于对所述业务数据执行局域网业务流导向，以及对经过部署在局域网的业务功能网元处理后的业务数据执行数据网络路由业务流导向以将所述处理后的业务数据发送至本地数据网络。
  2. 如权利要求1所述的方法，其特征在于，所述转发动作规则包括转发策略标识，所述转发策略标识是根据所述应用的局域网业务流导向策略标识和所述应用的数据网络路由业务流导向策略标识确定的；
    其中，所述应用的局域网业务流导向策略标识用于对所述业务数据执行局域网业务流导向，所述应用的数据网络路由业务流导向策略标识用于对所述业务数据执行数据网络路由业务流导向，所述应用的数据网络路由业务流导向策略标识与所述本地数据网络的数据网络接入标识DNAI对应。
  3. 如权利要求2所述的方法，其特征在于，还包括：
    所述用户面网元根据所述转发策略标识，获取所述转发策略。
  4. 如权利要求1所述的方法，其特征在于，所述转发动作规则包括转发策略标识和数据网络路由信息，所述转发策略标识是根据所述应用的局域网业务流导向策略标识确定的；
    其中，所述应用的局域网业务流导向策略标识用于对所述业务数据执行局域网业务流导向，所述数据网络路由信息用于对所述业务数据执行数据网络路由业务流导向，所述数据网络路由信息包括所述应用的服务器的地址、端口号或协议号中的至少一个，所述数据网络路由信息与所述本地数据网络的DNAI对应。
  5. 如权利要求1所述的方法，其特征在于，所述转发动作规则包括转发策略标识和数据网络路由信息，所述转发策略标识是根据所述应用的局域网业务流导向策略标识和所述应用的数据网络路由业务流导向策略标识确定的；
    其中，所述应用的局域网业务流导向策略标识用于对所述业务数据执行局域网业务流导向，所述应用的数据网络路由业务流导向策略标识和所述数据网络路由信息均用于对所述业务数据执行数据网络路由业务流导向，所述应用的数据网络路由业务流导向策略标识和所述数据网络路由信息均与所述本地数据网络的DNAI对应，所述数据网络路由信息包括所述应用的服务器的地址、端口号或协议号中的至少一个。
  6. 如权利要求4或5所述的方法，其特征在于，还包括：
    所述用户面网元根据所述转发策略标识和所述数据网络路由信息，获取所述转发策略。
  7. 一种通信方法，其特征在于，包括：
    会话管理网元接收PCC规则，所述PCC规则包括应用的局域网业务流导向策略标识和数据网络路由控制信息，所述数据网络路由控制信息包括至少一个数据网络接入标识DNAI以及所述至少一个DNAI分别对应的数据网络路由业务流导向策略标识和/或数据网络路由信息，所述局域网业务流导向策略标识用于对所述应用的业务数据执行局域网业务流导向，所述数据网络路由业务流导向策略标识和所述数据网络路由信息均用于对所述应用的业务数据执行数据网络路由业务流导向，所述数据网络路由信息包括所述应用的服务 器的地址、端口号或协议号中的至少一个；
    所述会话管理网元根据所述局域网业务流导向策略标识和所述数据网络路由控制信息，确定转发动作规则；
    所述会话管理网元向用户面网元发送所述转发动作规则。
  8. 如权利要求7所述的方法，其特征在于，所述会话管理网元根据所述局域网业务流导向策略标识和所述数据网络路由控制信息，确定转发动作规则，包括：
    所述会话管理网元确定所述至少一个DNAI中的目标DNAI，所述用户面网元对应所述目标DNAI；
    所述会话管理网元根据所述局域网业务流导向策略标识和所述目标DNAI对应的数据网络路由业务流导向策略标识，确定转发策略标识；
    其中，所述转发动作规则包括所述转发策略标识。
  9. 如权利要求8所述的方法，其特征在于，所述转发动作规则还包括所述目标DNAI对应的数据网络路由信息。
  10. 如权利要求7所述的方法，其特征在于，所述会话管理网元根据所述局域网业务流导向策略标识和所述数据网络路由控制信息，确定转发动作规则，包括：
    所述会话管理网元确定所述至少一个DNAI中的目标DNAI，所述用户面网元对应所述目标DNAI；
    所述会话管理网元根据所述局域网业务流导向策略标识，确定转发策略标识；
    其中，所述转发动作规则包括所述转发策略标识和所述目标DNAI对应的数据网络路由信息。
  11. 一种通信方法，其特征在于，包括：
    会话管理网元接收PCC规则，所述PCC规则包括数据网络路由控制信息和至少两个数据网络接入标识DNAI分别对应的局域网业务流导向策略标识，所述数据网络路由控制信息包括所述至少两个DNAI以及所述至少两个DNAI分别对应的数据网络路由业务流导向策略标识和/或数据网络路由信息，所述局域网业务流导向策略标识用于对应用的业务数据执行局域网业务流导向，所述数据网络路由业务流导向策略标识和所述数据网络路由信息均用于对所述应用的业务数据执行数据网络路由业务流导向，所述数据网络路由信息包括所述应用的服务器的地址、端口号或协议号中的至少一个；
    所述会话管理网元根据所述数据网络路由控制信息和所述至少两个DNAI分别对应的局域网业务流导向策略标识，确定转发动作规则；
    所述会话管理网元向用户面网元发送所述转发动作规则。
  12. 如权利要求11所述的方法，其特征在于，所述会话管理网元根据所述数据网络路由控制信息和所述至少两个DNAI分别对应的局域网业务流导向策略标识，确定转发动作规则，包括：
    所述会话管理网元确定所述至少两个DNAI中的目标DNAI，所述用户面网元对应所述目标DNAI；
    所述会话管理网元根据所述目标DNAI对应的局域网业务流导向策略标识和所述目标DNAI对应的数据网络路由业务流导向策略标识，确定转发策略标识；
    其中，所述转发动作规则包括所述转发策略标识。
  13. 如权利要求12所述的方法，其特征在于，所述转发动作规则还包括所述目标DNAI 对应的数据网络路由信息。
  14. 如权利要求11所述的方法，其特征在于，所述会话管理网元根据所述数据网络路由控制信息和所述至少两个DNAI分别对应的局域网业务流导向策略标识，确定转发动作规则，包括：
    所述会话管理网元确定所述至少两个DNAI中的目标DNAI，所述用户面网元对应所述目标DNAI；
    所述会话管理网元根据所述目标DNAI对应的局域网业务流导向策略标识，确定转发策略标识；
    其中，所述转发动作规则包括所述转发策略标识和所述目标DNAI对应的数据网络路由信息。
  15. 一种通信方法，其特征在于，包括：
    策略控制网元接收业务链标识、至少一个DNAI以及所述至少一个DNAI分别对应的配置标识，所述业务链标识指示一个业务链，该业务链用于对应用的业务数据执行业务链处理，所述配置标识用于对所述应用的业务数据执行数据网络路由业务流导向；
    所述策略控制网元根据所述业务链标识和所述至少一个DNAI分别对应的配置标识，确定所述至少一个DNAI分别对应的业务流导向策略标识，所述业务流导向策略标识用于对所述应用的业务数据执行局域网业务流导向和对所述应用的业务数据执行数据网络路由业务流导向；
    所述策略控制网元向会话管理网元发送所述PCC规则，所述PCC规则包括所述至少一个DNAI以及所述至少一个DNAI分别对应的业务流导向策略标识。
  16. 如权利要求15所述的方法，其特征在于，还包括：
    所述策略控制网元接收所述至少一个DNAI分别对应的数据网络路由信息，所述数据网络路由信息用于对所述应用的业务数据执行数据网络路由业务流导向，所述数据网络路由信息包括所述应用的服务器的地址、端口号或协议号中的至少一个；
    所述PCC规则还包括所述至少一个DNAI分别对应的数据网络路由信息。
  17. 一种通信方法，其特征在于，包括：
    策略控制网元接收至少两个数据网络接入标识DNAI，所述至少两个DNAI分别对应的配置标识和所述至少两个DNAI分别对应的业务链标识，所述业务链标识指示一个业务链，所述业务链用于对应用的业务数据执行业务链处理，所述配置标识用于对所述应用的业务数据执行数据网络路由业务流导向；
    所述策略控制网元根据所述至少两个DNAI分别对应的业务链标识和所述至少两个DNAI分别对应的配置标识，确定所述至少两个DNAI分别对应的业务流导向策略标识，所述业务流导向策略标识用于对所述应用的业务数据执行局域网业务流导向和对所述应用的业务数据执行数据网络路由业务流导向；
    所述策略控制网元向会话管理网元发送所述PCC规则，所述PCC规则包括所述至少两个DNAI以及所述至少两个DNAI分别对应的业务流导向策略标识。
  18. 如权利要求17所述的方法，其特征在于，还包括：
    所述策略控制网元接收所述至少两个DNAI分别对应的数据网络路由信息，所述数据网络路由信息用于对所述应用的业务数据执行数据网络路由业务流导向，所述数据网络路由信息包括所述应用的服务器的地址、端口号或协议号中的至少一个；
    所述PCC规则还包括所述至少两个DNAI分别对应的数据网络路由信息。
  19. 一种通信方法，其特征在于，包括：
    用户面网元确定与应用的业务数据匹配的第一包检测规则；
    所述用户面网元对所述业务数据执行与所述第一包检测规则关联的第一转发动作规则对应的第一转发策略，所述第一转发策略用于对所述业务数据执行局域网业务流导向；
    所述用户面网元确定与经过部署在局域网的业务功能网元处理后的业务数据匹配的第二包检测规则；
    所述用户面网元对所述处理后的业务数据执行与所述第二包检测规则关联的第二转发动作规则对应的第二转发策略，所述第二转发策略用于对所述处理后的业务数据执行数据网络路由业务流导向以将所述处理后的业务数据发送至本地数据网络。
  20. 如权利要求19所述的方法，其特征在于，所述第一转发动作规则包括第一策略标识，所述第一策略标识是根据所述应用的局域网业务流导向策略标识确定的；
    其中，所述应用的局域网业务流导向策略标识用于对所述业务数据执行局域网业务流导向。
  21. 如权利要求20所述的方法，其特征在于，还包括：
    所述用户面网元根据所述第一策略标识，获取所述第一转发策略。
  22. 如权利要求19所述的方法，其特征在于，所述第二转发动作规则包括第二策略标识和/或数据网络路由信息，所述第二策略标识是根据所述应用的数据网络路由业务流导向策略标识确定的，所述应用的数据网络路由业务流导向策略标识用于对所述业务数据执行数据网络路由业务流导向，所述数据网络路由信息用于对所述业务数据执行数据网络路由业务流导向，所述数据网络路由信息包括所述应用的服务器的地址、端口号或协议号中的至少一个，所述应用的数据网络路由业务流导向策略标识、所述数据网络路由信息均与所述本地数据网络的数据网络接入标识DNAI对应。
  23. 如权利要求22所述的方法，其特征在于，还包括：
    所述用户面网元根据所述第二策略标识和/或所述数据网络路由信息，获取所述第二转发策略。
  24. 一种通信方法，其特征在于，包括：
    会话管理网元接收PCC规则，所述PCC规则包括应用的局域网业务流导向策略标识和数据网络路由控制信息，所述数据网络路由控制信息包括至少一个数据网络接入标识DNAI以及所述至少一个DNAI分别对应的数据网络路由业务流导向策略标识和/或数据网络路由信息，所述局域网业务流导向策略标识用于对所述应用的业务数据执行局域网业务流导向，所述数据网络路由业务流导向策略标识和所述数据网络路由信息均用于对所述应用的业务数据执行数据网络路由业务流导向，所述数据网络路由信息包括所述应用的服务器的地址、端口号或协议号中的至少一个；
    所述会话管理网元根据所述局域网业务流导向策略标识，确定第一转发动作规则；
    所述会话管理网元根据所述数据网络路由控制信息，确定第二转发动作规则；
    所述会话管理网元向用户面网元发送所述第一转发动作规则和所述第二转发动作规则。
  25. 如权利要求24所述的方法，其特征在于，所述会话管理网元根据所述局域网业务流导向策略标识，确定第一转发动作规则，包括：
    所述会话管理网元根据所述局域网业务流导向策略标识，确定第一策略标识，所述第一策略标识用于指示第一转发策略；
    其中，所述第一转发动作规则包括所述第一策略标识。
  26. 如权利要求24或25所述的方法，其特征在于，所述数据网络路由控制信息包括至少一个DNAI以及所述至少一个DNAI分别对应的数据网络路由业务流导向策略标识；
    所述会话管理网元根据所述数据网络路由控制信息，确定第二转发动作规则，包括：
    所述会话管理网元确定所述至少一个DNAI中的目标DNAI，所述用户面网元对应所述目标DNAI；
    所述会话管理网元根据所述目标DNAI对应的数据网络路由业务流导向策略标识，确定第二策略标识，所述第二策略标识用于指示第二转发策略；
    其中，所述第二转发动作规则包括所述第二策略标识。
  27. 如权利要求24或25所述的方法，其特征在于，所述数据网络路由控制信息包括至少一个数据网络接入标识DNAI以及所述至少一个DNAI分别对应的数据网络路由信息；
    所述会话管理网元根据所述数据网络路由控制信息，确定第二转发动作规则，包括：
    所述会话管理网元确定所述至少一个DNAI中的目标DNAI，所述用户面网元对应所述目标DNAI；
    其中，所述第二转发动作规则包括所述目标DNAI对应的数据网络路由信息，所述目标DNAI对应的数据网络路由信息用于指示第二转发策略。
  28. 如权利要求24或25所述的方法，其特征在于，所述数据网络路由控制信息包括至少一个数据网络接入标识DNAI以及所述至少一个DNAI分别对应的数据网络路由业务流导向策略标识和数据网络路由信息；
    所述会话管理网元根据所述数据网络路由控制信息，确定第二转发动作规则，包括：
    所述会话管理网元确定所述至少一个DNAI中的目标DNAI，所述用户面网元对应所述目标DNAI；
    所述会话管理网元根据所述目标DNAI对应的数据网络路由业务流导向策略标识，确定第二策略标识；
    其中，所述第二转发动作规则包括所述第二策略标识和所述目标DNAI对应的数据网络路由信息，所述第二策略标识和所述目标DNAI对应的数据网络路由信息用于指示第二转发策略。
  29. 一种通信方法，其特征在于，包括：
    会话管理网元接收PCC规则，所述PCC规则包括数据网络路由控制信息和至少两个数据网络接入标识DNAI分别对应的局域网业务流导向策略标识，所述数据网络路由控制信息包括所述至少两个DNAI以及所述至少两个DNAI分别对应的数据网络路由业务流导向策略标识和/或数据网络路由信息，所述局域网业务流导向策略标识用于对应用的业务数据执行局域网业务流导向，所述数据网络路由业务流导向策略标识和所述数据网络路由信息均用于对所述应用的业务数据执行数据网络路由业务流导向，所述数据网络路由信息包括所述应用的服务器的地址、端口号或协议号中的至少一个；
    所述会话管理网元根据所述至少两个DNAI分别对应的局域网业务流导向策略标识，确定第一转发动作规则；
    所述会话管理网元根据所述数据网络路由控制信息，确定第二转发动作规则；
    所述会话管理网元向用户面网元发送所述第一转发动作规则和所述第二转发动作规则。
  30. 如权利要求29所述的方法，其特征在于，所述会话管理网元根据所述至少两个DNAI分别对应的局域网业务流导向策略标识，确定第一转发动作规则，包括：
    所述会话管理网元确定所述至少两个DNAI中的目标DNAI，所述用户面网元对应所述目标DNAI；
    所述会话管理网元根据所述目标DNAI对应的局域网业务流导向策略标识，确定第一策略标识，所述第一策略标识用于指示第一转发策略；
    其中，所述第一转发动作规则包括所述第一策略标识。
  31. 如权利要求29或30所述的方法，其特征在于，所述数据网络路由控制信息包括至少一个DNAI以及所述至少一个DNAI分别对应的数据网络路由业务流导向策略标识；
    所述会话管理网元根据所述数据网络路由控制信息，确定第二转发动作规则，包括：
    所述会话管理网元确定所述至少一个DNAI中的目标DNAI，所述用户面网元对应所述目标DNAI；
    所述会话管理网元根据所述目标DNAI对应的数据网络路由业务流导向策略标识，确定第二策略标识，所述第二策略标识用于指示第二转发策略；
    其中，所述第二转发动作规则包括所述第二策略标识。
  32. 如权利要求29或30所述的方法，其特征在于，所述数据网络路由控制信息包括至少一个数据网络接入标识DNAI以及所述至少一个DNAI分别对应的数据网络路由信息；
    所述会话管理网元根据所述数据网络路由控制信息，确定第二转发动作规则，包括：
    所述会话管理网元确定所述至少一个DNAI中的目标DNAI，所述用户面网元对应所述目标DNAI；
    其中，所述第二转发动作规则包括所述目标DNAI对应的数据网络路由信息，所述目标DNAI对应的数据网络路由信息用于指示第二转发策略。
  33. 如权利要求29或30所述的方法，其特征在于，所述数据网络路由控制信息包括至少一个数据网络接入标识DNAI以及所述至少一个DNAI分别对应的数据网络路由业务流导向策略标识和数据网络路由信息；
    所述会话管理网元根据所述数据网络路由控制信息，确定第二转发动作规则，包括：
    所述会话管理网元确定所述至少一个DNAI中的目标DNAI，所述用户面网元对应所述目标DNAI；
    所述会话管理网元根据所述目标DNAI对应的数据网络路由业务流导向策略标识，确定第二策略标识；
    其中，所述第二转发动作规则包括所述第二策略标识和所述目标DNAI对应的数据网络路由信息，所述第二策略标识和所述目标DNAI对应的数据网络路由信息用于指示第二转发策略。
  34. 一种通信装置，其特征在于，包括处理器和存储器，所述存储器和所述处理器耦合，所述存储器用于存储程序指令，所述处理器用于执行所述程序指令，以实现权利要求1至6中任一项所述的方法，或实现权利要求19至23中任一项所述的方法。
  35. 一种通信装置，其特征在于，包括处理器和存储器，所述存储器和所述处理器耦合，所述存储器用于存储程序指令，所述处理器用于执行所述程序指令，以实现权利要求7至 10中任一项所述的方法，或实现权利要求11至14中任一项所述的方法，或实现权利要求24至28中任一项所述的方法，或实现权利要求29至33中任一项所述的方法。
  36. 一种通信装置，其特征在于，包括处理器和存储器，所述存储器和所述处理器耦合，所述存储器用于存储程序指令，所述处理器用于执行所述程序指令，以实现权利要求15或16所述的方法，或实现权利要求17或18所述的方法。
  37. 一种计算机程序产品，其特征在于，所述计算机程序产品包括计算机程序或指令，当所述计算机程序或指令在处理器上运行时，使得处理器执行如权利要求1至33中任一项所述方法。
  38. 一种计算机可读存储介质，其特征在于，所述存储介质中存储有计算机程序或指令，当所述计算机程序或指令被通信装置执行时，实现如权利要求1至33中任一项所述方法。
  39. 一种通信系统，其特征在于，包括用户面网元和会话管理网元；
    所述用户面网元，用于从所述会话管理网元接收转发动作规则；
    所述会话管理网元，用于执行如权利要求7至10中任一项所述的方法。
  40. 一种通信系统，其特征在于，包括用户面网元和会话管理网元；
    所述用户面网元，用于从所述会话管理网元接收转发动作规则；
    所述会话管理网元，用于执行如权利要求11至14中任一项所述的方法。
  41. 一种通信系统，其特征在于，包括会话管理网元和策略控制网元；
    所述会话管理网元，用于从所述策略控制网元接收PCC规则；
    所述策略控制网元，用于执行如权利要求15或16所述的方法。
  42. 一种通信系统，其特征在于，包括会话管理网元和策略控制网元；
    所述会话管理网元，用于从所述策略控制网元接收PCC规则；
    所述策略控制网元，用于执行如权利要求17或18所述的方法。
  43. 一种通信系统，其特征在于，包括用户面网元和会话管理网元；
    所述用户面网元，用于从所述会话管理网元接收第一转发动作规则和第二转发动作规则；
    所述会话管理网元，用于执行如权利要求24至28中任一项所述的方法。
  44. 一种通信系统，其特征在于，包括用户面网元和会话管理网元；
    所述用户面网元，用于从所述会话管理网元接收第一转发动作规则和第二转发动作规则；
    所述会话管理网元，用于执行如权利要求29至33中任一项所述的方法。
  45. 一种通信方法，其特征在于，包括：
    会话管理网元接收PCC规则，所述PCC规则包括应用的局域网业务流导向策略标识和数据网络路由控制信息，所述数据网络路由控制信息包括至少一个数据网络接入标识DNAI以及所述至少一个DNAI分别对应的数据网络路由业务流导向策略标识和/或数据网络路由信息，所述局域网业务流导向策略标识用于对所述应用的业务数据执行局域网业务流导向，所述数据网络路由业务流导向策略标识和所述数据网络路由信息均用于对所述应用的业务数据执行数据网络路由业务流导向，所述数据网络路由信息包括所述应用的服务器的地址、端口号或协议号中的至少一个；
    所述会话管理网元根据所述局域网业务流导向策略标识和所述数据网络路由控制信息，确定转发动作规则；
    所述会话管理网元向用户面网元发送所述转发动作规则；
    所述用户面网元接收所述转发动作规则。
  46. 如权利要求45所述的方法，其特征在于，所述会话管理网元根据所述局域网业务流导向策略标识和所述数据网络路由控制信息，确定转发动作规则，包括：
    所述会话管理网元确定所述至少一个DNAI中的目标DNAI，所述用户面网元对应所述目标DNAI；
    所述会话管理网元根据所述局域网业务流导向策略标识和所述目标DNAI对应的数据网络路由业务流导向策略标识，确定转发策略标识；
    其中，所述转发动作规则包括所述转发策略标识。
  47. 如权利要求46所述的方法，其特征在于，所述转发动作规则还包括所述目标DNAI对应的数据网络路由信息。
  48. 如权利要求45所述的方法，其特征在于，所述会话管理网元根据所述局域网业务流导向策略标识和所述数据网络路由控制信息，确定转发动作规则，包括：
    所述会话管理网元确定所述至少一个DNAI中的目标DNAI，所述用户面网元对应所述目标DNAI；
    所述会话管理网元根据所述局域网业务流导向策略标识，确定转发策略标识；
    其中，所述转发动作规则包括所述转发策略标识和所述目标DNAI对应的数据网络路由信息。
  49. 一种通信方法，其特征在于，包括：
    会话管理网元接收PCC规则，所述PCC规则包括数据网络路由控制信息和至少两个数据网络接入标识DNAI分别对应的局域网业务流导向策略标识，所述数据网络路由控制信息包括所述至少两个DNAI以及所述至少两个DNAI分别对应的数据网络路由业务流导向策略标识和/或数据网络路由信息，所述局域网业务流导向策略标识用于对应用的业务数据执行局域网业务流导向，所述数据网络路由业务流导向策略标识和所述数据网络路由信息均用于对所述应用的业务数据执行数据网络路由业务流导向，所述数据网络路由信息包括所述应用的服务器的地址、端口号或协议号中的至少一个；
    所述会话管理网元根据所述数据网络路由控制信息和所述至少两个DNAI分别对应的局域网业务流导向策略标识，确定转发动作规则；
    所述会话管理网元向用户面网元发送所述转发动作规则；
    所述用户面网元接收所述转发动作规则。
  50. 如权利要求49所述的方法，其特征在于，所述会话管理网元根据所述数据网络路由控制信息和所述至少两个DNAI分别对应的局域网业务流导向策略标识，确定转发动作规则，包括：
    所述会话管理网元确定所述至少两个DNAI中的目标DNAI，所述用户面网元对应所述目标DNAI；
    所述会话管理网元根据所述目标DNAI对应的局域网业务流导向策略标识和所述目标DNAI对应的数据网络路由业务流导向策略标识，确定转发策略标识；
    其中，所述转发动作规则包括所述转发策略标识。
  51. 如权利要求50所述的方法，其特征在于，所述转发动作规则还包括所述目标DNAI对应的数据网络路由信息。
  52. 如权利要求49所述的方法，其特征在于，所述会话管理网元根据所述数据网络路由控制信息和所述至少两个DNAI分别对应的局域网业务流导向策略标识，确定转发动作规则，包括：
    所述会话管理网元确定所述至少两个DNAI中的目标DNAI，所述用户面网元对应所述目标DNAI；
    所述会话管理网元根据所述目标DNAI对应的局域网业务流导向策略标识，确定转发策略标识；
    其中，所述转发动作规则包括所述转发策略标识和所述目标DNAI对应的数据网络路由信息。
  53. 一种通信方法，其特征在于，包括：
    策略控制网元接收业务链标识、至少一个DNAI以及所述至少一个DNAI分别对应的配置标识，所述业务链标识指示一个业务链，该业务链用于对应用的业务数据执行业务链处理，所述配置标识用于对所述应用的业务数据执行数据网络路由业务流导向；
    所述策略控制网元根据所述业务链标识和所述至少一个DNAI分别对应的配置标识，确定所述至少一个DNAI分别对应的业务流导向策略标识，所述业务流导向策略标识用于对所述应用的业务数据执行局域网业务流导向和对所述应用的业务数据执行数据网络路由业务流导向；
    所述策略控制网元向会话管理网元发送所述PCC规则，所述PCC规则包括所述至少一个DNAI以及所述至少一个DNAI分别对应的业务流导向策略标识；
    所述会话管理网元接收所述PCC规则。
  54. 如权利要求53所述的方法，其特征在于，还包括：
    所述策略控制网元接收所述至少一个DNAI分别对应的数据网络路由信息，所述数据网络路由信息用于对所述应用的业务数据执行数据网络路由业务流导向，所述数据网络路由信息包括所述应用的服务器的地址、端口号或协议号中的至少一个；
    所述PCC规则还包括所述至少一个DNAI分别对应的数据网络路由信息。
  55. 一种通信方法，其特征在于，包括：
    策略控制网元接收至少两个数据网络接入标识DNAI，所述至少两个DNAI分别对应的配置标识和所述至少两个DNAI分别对应的业务链标识，所述业务链标识指示一个业务链，所述业务链用于对应用的业务数据执行业务链处理，所述配置标识用于对所述应用的业务数据执行数据网络路由业务流导向；
    所述策略控制网元根据所述至少两个DNAI分别对应的业务链标识和所述至少两个DNAI分别对应的配置标识，确定所述至少两个DNAI分别对应的业务流导向策略标识，所述业务流导向策略标识用于对所述应用的业务数据执行局域网业务流导向和对所述应用的业务数据执行数据网络路由业务流导向；
    所述策略控制网元向会话管理网元发送所述PCC规则，所述PCC规则包括所述至少两个DNAI以及所述至少两个DNAI分别对应的业务流导向策略标识；
    所述会话管理网元接收所述PCC规则。
  56. 如权利要求55所述的方法，其特征在于，还包括：
    所述策略控制网元接收所述至少两个DNAI分别对应的数据网络路由信息，所述数据网络路由信息用于对所述应用的业务数据执行数据网络路由业务流导向，所述数据网络路 由信息包括所述应用的服务器的地址、端口号或协议号中的至少一个；
    所述PCC规则还包括所述至少两个DNAI分别对应的数据网络路由信息。
  57. 一种通信方法，其特征在于，包括：
    会话管理网元接收PCC规则，所述PCC规则包括应用的局域网业务流导向策略标识和数据网络路由控制信息，所述数据网络路由控制信息包括至少一个数据网络接入标识DNAI以及所述至少一个DNAI分别对应的数据网络路由业务流导向策略标识和/或数据网络路由信息，所述局域网业务流导向策略标识用于对所述应用的业务数据执行局域网业务流导向，所述数据网络路由业务流导向策略标识和所述数据网络路由信息均用于对所述应用的业务数据执行数据网络路由业务流导向，所述数据网络路由信息包括所述应用的服务器的地址、端口号或协议号中的至少一个；
    所述会话管理网元根据所述局域网业务流导向策略标识，确定第一转发动作规则；
    所述会话管理网元根据所述数据网络路由控制信息，确定第二转发动作规则；
    所述会话管理网元向用户面网元发送所述第一转发动作规则和所述第二转发动作规则；
    所述用户面网元接收所述第一转发动作规则和所述第二转发动作规则。
  58. 如权利要求57所述的方法，其特征在于，所述会话管理网元根据所述局域网业务流导向策略标识，确定第一转发动作规则，包括：
    所述会话管理网元根据所述局域网业务流导向策略标识，确定第一策略标识，所述第一策略标识用于指示第一转发策略；
    其中，所述第一转发动作规则包括所述第一策略标识。
  59. 如权利要求57或58所述的方法，其特征在于，所述数据网络路由控制信息包括至少一个DNAI以及所述至少一个DNAI分别对应的数据网络路由业务流导向策略标识；
    所述会话管理网元根据所述数据网络路由控制信息，确定第二转发动作规则，包括：
    所述会话管理网元确定所述至少一个DNAI中的目标DNAI，所述用户面网元对应所述目标DNAI；
    所述会话管理网元根据所述目标DNAI对应的数据网络路由业务流导向策略标识，确定第二策略标识，所述第二策略标识用于指示第二转发策略；
    其中，所述第二转发动作规则包括所述第二策略标识。
  60. 如权利要求57或58所述的方法，其特征在于，所述数据网络路由控制信息包括至少一个数据网络接入标识DNAI以及所述至少一个DNAI分别对应的数据网络路由信息；
    所述会话管理网元根据所述数据网络路由控制信息，确定第二转发动作规则，包括：
    所述会话管理网元确定所述至少一个DNAI中的目标DNAI，所述用户面网元对应所述目标DNAI；
    其中，所述第二转发动作规则包括所述目标DNAI对应的数据网络路由信息，所述目标DNAI对应的数据网络路由信息用于指示第二转发策略。
  61. 如权利要求57或58所述的方法，其特征在于，所述数据网络路由控制信息包括至少一个数据网络接入标识DNAI以及所述至少一个DNAI分别对应的数据网络路由业务流导向策略标识和数据网络路由信息；
    所述会话管理网元根据所述数据网络路由控制信息，确定第二转发动作规则，包括：
    所述会话管理网元确定所述至少一个DNAI中的目标DNAI，所述用户面网元对应所 述目标DNAI；
    所述会话管理网元根据所述目标DNAI对应的数据网络路由业务流导向策略标识，确定第二策略标识；
    其中，所述第二转发动作规则包括所述第二策略标识和所述目标DNAI对应的数据网络路由信息，所述第二策略标识和所述目标DNAI对应的数据网络路由信息用于指示第二转发策略。
  62. 一种通信方法，其特征在于，包括：
    会话管理网元接收PCC规则，所述PCC规则包括数据网络路由控制信息和至少两个数据网络接入标识DNAI分别对应的局域网业务流导向策略标识，所述数据网络路由控制信息包括所述至少两个DNAI以及所述至少两个DNAI分别对应的数据网络路由业务流导向策略标识和/或数据网络路由信息，所述局域网业务流导向策略标识用于对应用的业务数据执行局域网业务流导向，所述数据网络路由业务流导向策略标识和所述数据网络路由信息均用于对所述应用的业务数据执行数据网络路由业务流导向，所述数据网络路由信息包括所述应用的服务器的地址、端口号或协议号中的至少一个；
    所述会话管理网元根据所述至少两个DNAI分别对应的局域网业务流导向策略标识，确定第一转发动作规则；
    所述会话管理网元根据所述数据网络路由控制信息，确定第二转发动作规则；
    所述会话管理网元向用户面网元发送所述第一转发动作规则和所述第二转发动作规则；
    所述用户面网元接收所述第一转发动作规则和所述第二转发动作规则。
  63. 如权利要求62所述的方法，其特征在于，所述会话管理网元根据所述至少两个DNAI分别对应的局域网业务流导向策略标识，确定第一转发动作规则，包括：
    所述会话管理网元确定所述至少两个DNAI中的目标DNAI，所述用户面网元对应所述目标DNAI；
    所述会话管理网元根据所述目标DNAI对应的局域网业务流导向策略标识，确定第一策略标识，所述第一策略标识用于指示第一转发策略；
    其中，所述第一转发动作规则包括所述第一策略标识。
  64. 如权利要求62或63所述的方法，其特征在于，所述数据网络路由控制信息包括至少一个DNAI以及所述至少一个DNAI分别对应的数据网络路由业务流导向策略标识；
    所述会话管理网元根据所述数据网络路由控制信息，确定第二转发动作规则，包括：
    所述会话管理网元确定所述至少一个DNAI中的目标DNAI，所述用户面网元对应所述目标DNAI；
    所述会话管理网元根据所述目标DNAI对应的数据网络路由业务流导向策略标识，确定第二策略标识，所述第二策略标识用于指示第二转发策略；
    其中，所述第二转发动作规则包括所述第二策略标识。
  65. 如权利要求62或63所述的方法，其特征在于，所述数据网络路由控制信息包括至少一个数据网络接入标识DNAI以及所述至少一个DNAI分别对应的数据网络路由信息；
    所述会话管理网元根据所述数据网络路由控制信息，确定第二转发动作规则，包括：
    所述会话管理网元确定所述至少一个DNAI中的目标DNAI，所述用户面网元对应所述目标DNAI；
    其中，所述第二转发动作规则包括所述目标DNAI对应的数据网络路由信息，所述目标DNAI对应的数据网络路由信息用于指示第二转发策略。
  66. 如权利要求62或63所述的方法，其特征在于，所述数据网络路由控制信息包括至少一个数据网络接入标识DNAI以及所述至少一个DNAI分别对应的数据网络路由业务流导向策略标识和数据网络路由信息；
    所述会话管理网元根据所述数据网络路由控制信息，确定第二转发动作规则，包括：
    所述会话管理网元确定所述至少一个DNAI中的目标DNAI，所述用户面网元对应所述目标DNAI；
    所述会话管理网元根据所述目标DNAI对应的数据网络路由业务流导向策略标识，确定第二策略标识；
    其中，所述第二转发动作规则包括所述第二策略标识和所述目标DNAI对应的数据网络路由信息，所述第二策略标识和所述目标DNAI对应的数据网络路由信息用于指示第二转发策略。
PCT/CN2022/133306 2022-03-29 2022-11-21 通信方法、通信装置及通信系统 WO2023185015A1 (zh)

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