CN111770545A

CN111770545A - Service flow routing control method, device and system

Info

Publication number: CN111770545A
Application number: CN201910263116.7A
Authority: CN
Inventors: 张迪; 于游洋
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-04-02
Filing date: 2019-04-02
Publication date: 2020-10-13
Anticipated expiration: 2039-04-02
Also published as: WO2020199896A1; CN111770545B

Abstract

The embodiment of the application provides a method, a device and a system for controlling a service flow route, relates to the technical field of communication, and is used for effectively realizing service flow distribution in a scene of fusion of a fixed network and a mobile network. The method comprises the following steps: a core network element acquires a routing strategy of a terminal according to any one or more of identification information of the terminal, an access type of the terminal and position information of the terminal; wherein, the routing strategy is a core network routing strategy and/or a local routing strategy; and the core network element sends the routing strategy to an access network gateway or a terminal.

Description

Service flow routing control method, device and system

Technical Field

The embodiment of the application relates to the technical field of communication, in particular to a method, a device and a system for controlling a service flow route.

Background

To address the challenges of wireless broadband technology, the leading advantages of third generation partnership Project (3 GPP) networks are maintained. The 3GPP standards group defines a Next Generation mobile communication network architecture (Next Generation System), which may also be referred to as a 5-Generation (5G) network architecture. The 5G Network architecture supports a terminal to Access a 5G Core Network (CN) through a Radio technology (such as a 5G Radio Access Network (RAN)) defined by a 3GPP standard group.

In addition, the 5GC may support fixed network/wired network access in addition to RAN access (e.g., the 5GC supports home Gateway (RG) access over a wired network). Therefore, a scenario of convergence of a fixed network and a mobile network (abbreviated as "fixed-mobile convergence") may also exist in 5 GC. In the prior art, in a Fixed-mobile convergence scenario, service flows processed by a home Gateway (e.g., a 5G-RG/Fixed Network home Gateway (FN-RG)) all need to pass through a 5 GC. That is, when the home gateway is registered in the 5GC, the service flow transmitted by the home gateway is accessed to the Data Network (DN) through a User Plane Function (UPF) Network element in the 5 GC. The service distribution processing method in the prior art cannot adapt to a solid-mobile fusion scene.

Disclosure of Invention

The embodiment of the application provides a method, a device and a system for controlling a service flow route, which are used for effectively realizing service flow distribution in a scene of fusion of a fixed network and a mobile network.

In order to achieve the above purpose, the preferred embodiment of the present application provides the following technical solutions:

in a first aspect, an embodiment of the present application provides a method for controlling a service flow route, including: the core network element acquires a routing strategy of the terminal according to any one or more of the identification information of the terminal, the access type of the terminal and the position information of the terminal; wherein, the routing strategy is a core network routing strategy and/or a local routing strategy; and the core network element sends a routing strategy to an access network gateway or a terminal.

The embodiment of the application provides a method for controlling a service flow routing, which includes acquiring a routing policy of a terminal through a core network element according to any one or more of identification information of the terminal, an access type of the terminal and position information of the terminal, and sending the acquired routing policy to an access network gateway or the terminal, so that the access network gateway or the terminal processes a service flow of the terminal according to the routing policy. In the prior art, the charging Policy of all service flows transmitted by the home gateway is controlled by a Policy and Control Function (PCF) network element in the 5 GC. For example, if the access network gateway or the terminal determines that the low-value and low-QoS service flows require a local routing policy for transmission, the service flows are transmitted through the local routing policy, which not only meets the user requirements, but also retains the deployment of operators for BNG.

In a possible implementation manner, the method provided in the embodiment of the present application further includes: the core network element receives a request message, the request message including any one or more of the following information: identification information of the terminal, an access type of the terminal, or location information of the terminal.

In one possible implementation, the core network routing policy includes: a core network routing indication and/or stream description information, wherein the core network routing indication is used for indicating the service stream determined by the transmission stream description information through the core network; the local routing policy includes: local routing indication and/or flow description information. Wherein the local routing indication is used for indicating the service flow determined by the local routing transmission flow description information.

In one possible implementation, the flow description information includes any one or more of the following information: application identification, flow quintuple identification, VLAN label, session type, access line identification and access point identification.

In a possible implementation manner, the method provided in the embodiment of the present application further includes: a core network element acquires capability information of an access network gateway, wherein the capability information is used for indicating whether the access network gateway has the capability of allocating a first address for the terminal or the service local routing capability; the first address is an address allocated to the terminal by the access network gateway; the method for acquiring a routing policy of a terminal by a core network element according to any one or more of identification information of the terminal and location information of an access type terminal of the terminal includes: and the core network element acquires the routing strategy according to any one or more of the identification information of the terminal, the access type of the terminal and the position information of the terminal and the capability information.

In a possible implementation manner, the acquiring, by a network element of a core network, a routing policy of a terminal according to any one or more of identification information of the terminal, an access type of the terminal, location information of the terminal, and capability information includes: the access network gateway has the capability of allocating a first address for the terminal or the local routing capability of the service, and the core network element determines the routing strategy as a local routing strategy; or/and the access network gateway does not have the capability of allocating the first address for the terminal or the service local routing capability, and the core network element determines the routing strategy as the core network routing strategy.

In a possible implementation manner, the acquiring, by a network element of a core network, capability information of an access network gateway includes: the core network element receives capability information from the access network gateway.

In a second aspect, an embodiment of the present application provides a method for controlling a service flow route, including: an access network gateway receives a routing strategy of a terminal from a core network element; wherein, the routing strategy is a core network routing strategy and/or a local routing strategy; and the access network gateway processes the service flow of the terminal according to the routing strategy.

In a possible implementation manner, the service flow is transmitted through a core network routing policy, and the access network gateway processes the service flow of the terminal according to the routing policy, including: the access network gateway processes the service flow by adopting the second address of the terminal and sends the processed service flow to the fixed-mobile network interaction function; the second address is an address allocated to the terminal by the core network.

In a possible implementation manner, the service flow is transmitted through a core network routing policy, and the access network gateway processes the service flow of the terminal according to the routing policy, including: the access network gateway processes the service flow by adopting the second address of the terminal and sends the processed service flow to the user plane functional network element, or: the access network gateway replaces the address of the service flow from the first address to the second address and sends the processed service flow to the user plane functional network element.

In a possible implementation manner, an access network gateway processes a traffic flow of a terminal according to a routing policy, including: the traffic is transmitted via a local routing policy, and the access network gateway transmits the traffic to the data network using the first address of the terminal.

In a possible implementation manner, the method provided in the embodiment of the present application further includes: the access network gateway receives the service quality parameters from the core network element; the access network gateway processes the service flow of the terminal according to the routing strategy, and comprises the following steps: the access network gateway processes the service flow of the terminal according to the service quality parameter and the routing strategy, the service quality parameter comprises the service quality parameter of the terminal granularity, and the service flow comprises the service flow transmitted by adopting the core network routing strategy and/or the service flow transmitted by adopting the local routing strategy.

In a possible implementation manner, the method provided in the embodiment of the present application further includes: the access network gateway receives a second request message from the terminal or first indication information from a core network element, wherein the second request message is used for requesting to allocate a first address to the terminal, and the first indication information is used for indicating that the access network gateway is allowed to allocate the first address to the terminal; and the access network gateway allocates a first address for the terminal according to the second request message or the first indication information.

In a possible implementation manner, the method provided in the embodiment of the present application further includes: and the access network gateway acquires a second address allocated to the terminal by the core network element.

In a possible implementation manner, the method provided in the embodiment of the present application further includes: the access network gateway sends a second address to the terminal according to the routing strategy of the core network; or/and the access network gateway sends the first address to the terminal according to the first indication information or the second request message.

In a third aspect, an embodiment of the present application provides a method for controlling a service flow route, including: the terminal receives a routing strategy of the terminal from an access network gateway; wherein, the routing strategy is a core network routing strategy and/or a local routing strategy; and the terminal processes the service flow of the terminal according to the routing strategy.

In a possible implementation manner, the method provided in the embodiment of the present application further includes: the terminal receives a second address of the terminal, wherein the second address is an address allocated to the terminal by the core network; or/and the terminal receives a first address of the terminal, wherein the first address is an address allocated to the terminal by the access network gateway.

In a possible implementation manner, the method provided in the embodiment of the present application further includes: and the terminal sends a second request message for requesting a first address of the terminal to the access network gateway according to the local routing strategy, wherein the first address is an address allocated to the terminal by the access network gateway.

In a possible implementation manner, a terminal processes a traffic flow of the terminal according to a routing policy, including: the routing strategy is a core network routing strategy, and the terminal adopts a second address to package the service flow of the terminal; and the encapsulated service flow is transmitted through the user plane functional network element.

In a possible implementation manner, a terminal processes a traffic flow of the terminal according to a routing policy, including: the routing strategy is a local routing strategy, and the terminal adopts a first address to package the service flow of the terminal; and transmitting the encapsulated service flow to a data network through an access network gateway.

In a possible implementation manner, the method provided in the embodiment of the present application further includes: the terminal acquires service quality parameters, wherein the service quality parameters comprise service quality parameters of terminal granularity; the terminal processes the service flow of the terminal according to the routing strategy, which comprises the following steps: and the terminal processes the service flow of the terminal according to the service quality parameter and the routing strategy, wherein the service flow comprises the service flow transmitted by adopting the core network routing strategy and/or the service flow transmitted by adopting the local routing strategy.

In a fourth aspect, the present application provides a communication device, which may implement the method of the first aspect or any possible implementation manner of the first aspect, and therefore may also achieve the beneficial effects of the first aspect or any possible implementation manner of the first aspect. The communication device may be a core network element, or may also be a device that can support the core network element to implement the method in the first aspect or any possible implementation manner of the first aspect, for example, a chip applied to the core network element. The device can realize the method through software, hardware or corresponding software executed by hardware.

An example, an embodiment of the present application provides a communication apparatus, including: a communication unit, configured to receive a routing policy of a terminal from a core network element; wherein, the routing strategy is a core network routing strategy and/or a local routing strategy; and the processing unit is used for processing the service flow of the terminal according to the routing strategy.

In a possible implementation manner, the service flow is transmitted through the core network routing policy, and the processing unit is specifically configured to process the service flow by using the second address of the terminal, and send the processed service flow to a fixed-mobile network interaction function; the second address is an address allocated to the terminal by the core network.

In a possible implementation manner, the service flow is transmitted through a core network routing policy, and the processing unit is specifically configured to process the service flow by using a second address of the terminal, and send the processed service flow to a user plane function network element, or: and the processing unit is specifically configured to replace the address of the service flow from the first address to the second address, and send the processed service flow to the user plane functional network element.

In a possible implementation, the traffic stream is transmitted via a local routing policy, and the processing unit is specifically configured to transmit the traffic stream to the data network using the first address of the terminal.

In a possible implementation manner, the communication unit is further configured to receive a quality of service parameter from a core network element; and the processing unit is further configured to process a service flow of the terminal according to the service quality parameter and the routing policy, where the service quality parameter includes a service quality parameter of a terminal granularity, and the service flow includes a service flow transmitted by a core network routing policy and/or a service flow transmitted by a local routing policy.

In a possible implementation manner, the communication unit is further configured to receive a second request message from the terminal or first indication information from a core network element, where the second request message is used to request that a first address is allocated to the terminal, and the first indication information is used to indicate that an access network gateway is allowed to allocate the first address to the terminal; and the processing unit is specifically configured to allocate a first address to the terminal according to the second request message or the first indication information.

In a possible implementation manner, the communication unit is further configured to obtain a second address allocated by the core network element to the terminal.

In a possible implementation manner, the communication unit is further configured to send the second address to the terminal according to a core network routing policy; and/or the communication unit is further used for sending the first address to the terminal according to the first indication information or the second request message.

In another example, an embodiment of the present application provides a communication apparatus, where the communication apparatus may be a core network element, or may be a chip in the core network element. The communication apparatus may include: a communication unit and a processing unit. When the communication device is a core network element, the communication unit may be an interface circuit. The communication device may further include a storage unit. The storage unit may be a memory. The memory unit is to store computer program code, the computer program code comprising instructions. The processing unit may be a processor. The processing unit executes the instructions stored by the storage unit to cause the communication device to implement the method described in the first aspect or any one of the possible implementations of the first aspect. When the communication device is a chip in a network element of a core network, the processing unit may be a processor, and the communication unit may be collectively referred to as: a communication interface. For example, the communication interface may be an input/output interface, a pin or a circuit, or the like. The processing unit executes computer program code stored by a storage unit, which may be a storage unit (e.g., register, cache, etc.) within the chip or a storage unit (e.g., read only memory, random access memory, etc.) located outside the chip, so as to enable the core network element to implement the method described in the first aspect or any one of the possible implementations of the first aspect.

Optionally, the processor, the communication interface and the memory are coupled to each other.

In a fifth aspect, the present application provides a communication device, which may implement the method of the second aspect or any possible implementation manner of the second aspect, and thus may also achieve the beneficial effects of the second aspect or any possible implementation manner of the second aspect. The communication device may be an access network gateway, or may also be a device that can support the access network gateway to implement the second aspect or the method in any possible implementation manner of the second aspect, for example, a chip applied in the access network gateway. The device can realize the method through software, hardware or corresponding software executed by hardware.

An example, an embodiment of the present application provides a communication apparatus, including: a communication unit, configured to receive a routing policy of a terminal from an access network gateway; wherein, the routing strategy is a core network routing strategy and/or a local routing strategy; and the processing unit is used for processing the service flow of the terminal according to the routing strategy.

In a possible implementation manner, the communication unit is further configured to receive a second address of the terminal, where the second address is an address allocated by the core network for the terminal; and/or the communication unit is further configured to receive a first address of the terminal, where the first address is an address allocated to the terminal by the access network gateway.

In a possible implementation manner, the communication unit is further configured to send a second request message to the access network gateway according to the local routing policy, where the second request message is used to request a first address of the terminal, and the first address is an address allocated by the access network gateway to the terminal.

In a possible implementation, the routing policy is a core network routing policy, and the processing unit is specifically configured to encapsulate a service flow of the terminal using a second address; and the encapsulated service flow is transmitted through the user plane functional network element.

In a possible implementation manner, the routing policy is a local routing policy, and the processing unit is specifically configured to encapsulate a service flow of the terminal with a first address; and transmitting the encapsulated service flow to a data network through an access network gateway.

In a possible implementation manner, the communication unit is further configured to obtain a quality of service parameter, where the quality of service parameter includes a quality of service parameter of a terminal granularity; and the processing unit is specifically configured to process a service flow of the terminal according to the quality of service parameter and the routing policy, where the service flow includes a service flow transmitted by using a core network routing policy and/or a service flow transmitted by using a local routing policy.

For another example, an embodiment of the present application provides a communication device, where the communication device may be an access network gateway, or may be a chip within the access network gateway. The communication apparatus may include: a communication unit and a processing unit. When the communication device is an access network gateway, the communication unit may be an interface circuit. The communication device may further include a storage unit. The storage unit may be a memory. The memory unit is to store computer program code, the computer program code comprising instructions. The processing unit may be a processor. The processing unit executes the instructions stored by the storage unit to cause the communication device to implement the method described in the second aspect or any one of the possible implementations of the second aspect. When the communication device is a chip within an access network gateway, the processing unit may be a processor, and the communication unit may be collectively referred to as: a communication interface. For example, the communication interface may be an input/output interface, a pin or a circuit, or the like. The processing unit executes computer program code stored by a memory unit, which may be a memory unit within the chip (e.g. a register, a cache, etc.) or a memory unit external to the chip within the access network gateway (e.g. a read-only memory, a random access memory, etc.), to cause the access network gateway to implement the method described in the second aspect or any of the possible implementations of the second aspect.

In a sixth aspect, the present application provides a communication apparatus that may implement the method in any possible implementation manner of the third aspect or the third aspect, and therefore may also achieve the beneficial effects in any possible implementation manner of the third aspect or the third aspect. The communication device may be a terminal, or may be a device that can support the terminal to implement the method in the third aspect or any possible implementation manner of the third aspect, for example, a chip applied in the terminal. The device can realize the method through software, hardware or corresponding software executed by hardware.

In a possible implementation manner, the communication unit is configured to receive a second address of the terminal, where the second address is an address allocated by a core network to the terminal; or/and a communication unit, configured to receive a first address of the terminal, where the first address is an address allocated by the access network gateway to the terminal.

In a possible implementation manner, the routing policy is the core network routing policy, and the processing unit is specifically configured to encapsulate a service flow of the terminal with a second address; and the encapsulated service flow is transmitted through a user plane functional network element.

In a possible implementation manner, the routing policy is the local routing policy, and the processing unit is specifically configured to encapsulate a service flow of the terminal with a first address; and transmitting the encapsulated service flow to a data network through the access network gateway.

In a possible implementation manner, the communication unit is further configured to obtain a quality of service parameter, where the quality of service parameter includes a quality of service parameter of a terminal granularity; and a processing unit, configured to process a service flow of the terminal according to the qos parameter and the routing policy, where the service flow includes a service flow transmitted by using the core network routing policy and/or a service flow transmitted by using the local routing policy.

In another example, an embodiment of the present application provides a communication device, where the communication device may be a terminal or a chip in the terminal. The communication apparatus may include: a communication unit and a processing unit. When the communication device is a terminal, the communication unit may be an interface circuit. The communication device may further include a storage unit. The storage unit may be a memory. The memory unit is to store computer program code, the computer program code comprising instructions. The processing unit may be a processor. The processing unit executes the instructions stored by the storage unit to cause the communication device to implement the method described in the third aspect or any one of the possible implementations of the third aspect. When the communication device is a chip within a terminal, the processing unit may be a processor, and the communication units may be collectively referred to as: a communication interface. For example, the communication interface may be an input/output interface, a pin or a circuit, or the like. The processing unit executes the computer program code stored in the storage unit, which may be a storage unit (e.g. a register, a cache, etc.) within the chip or a storage unit (e.g. a read-only memory, a random access memory, etc.) external to the chip, to cause the terminal to implement the method described in any one of the possible implementations of the third aspect or the third aspect.

In a seventh aspect, an embodiment of the present application provides a computer-readable storage medium, where a computer program or an instruction is stored in the computer-readable storage medium, and when the computer program or the instruction runs on a computer, the computer is caused to execute the traffic flow routing control method described in any one of the possible implementation manners of the first aspect to the first aspect.

In an eighth aspect, the present invention provides a computer-readable storage medium, in which a computer program or instructions are stored, and when the computer program or instructions are run on a computer, the computer is caused to execute the traffic flow routing control method described in any one of the possible implementation manners of the second aspect to the second aspect.

In a ninth aspect, the present application provides a computer-readable storage medium, in which a computer program or instructions are stored, and when the computer program or instructions are run on a computer, the computer is caused to execute the traffic flow routing control method described in any one of the possible implementation manners of the third aspect to the third aspect.

In a tenth aspect, embodiments of the present application provide a computer program product including instructions that, when executed on a computer, cause the computer to execute a traffic flow routing control method described in the first aspect or in various possible implementations of the first aspect.

In an eleventh aspect, the present application provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform a traffic flow routing control method as described in the second aspect or in various possible implementations of the second aspect.

In a twelfth aspect, the present application provides a computer program product comprising instructions that, when run on a computer, cause the computer to perform a traffic flow routing control method as described in the third aspect or in various possible implementations of the third aspect.

In a thirteenth aspect, an embodiment of the present application provides a communication system, where the communication system includes any one or more of the following: the communication device described in the fourth aspect and various possible implementations, the communication device described in the fifth aspect and various possible implementations of the fifth aspect, and the communication device described in the sixth aspect and various possible implementations of the sixth aspect.

In a fourteenth aspect, an embodiment of the present application provides a communication apparatus, which includes a processor and a storage medium, where the storage medium stores instructions, and the instructions, when executed by the processor, implement the traffic flow routing control method as described in the first aspect or various possible implementation manners of the first aspect.

In a fifteenth aspect, an embodiment of the present application provides a communication device, which includes a processor and a storage medium, where the storage medium stores instructions that, when executed by the processor, implement the traffic flow routing control method as described in the second aspect or various possible implementation manners of the second aspect.

In a sixteenth aspect, an embodiment of the present application provides a communication apparatus, which includes a processor and a storage medium, where the storage medium stores instructions that, when executed by the processor, implement the traffic flow routing control method as described in the third aspect or various possible implementations of the third aspect.

In a seventeenth aspect, the present embodiments provide a communication apparatus, where the communication apparatus includes one or more modules, configured to implement the methods of the first, second, and third aspects, where the one or more modules may correspond to each step in the methods of the first, second, and third aspects.

In an eighteenth aspect, embodiments of the present application provide a chip, where the chip includes a processor and a communication interface, where the communication interface is coupled to the processor, and the processor is configured to execute a computer program or instructions to implement the first aspect or one of the traffic flow routing control methods described in the various possible implementations of the first aspect. The communication interface is used for communicating with other modules outside the chip.

In a nineteenth aspect, embodiments of the present application provide a chip, where the chip includes a processor and a communication interface, where the communication interface is coupled to the processor, and the processor is configured to execute a computer program or instructions to implement one of the traffic flow routing control methods described in the second aspect or various possible implementations of the second aspect. The communication interface is used for communicating with other modules outside the chip.

In a twentieth aspect, embodiments of the present application provide a chip, where the chip includes a processor and a communication interface, and the communication interface is coupled to the processor, and the processor is configured to execute a computer program or instructions to implement one of the traffic flow routing control methods described in the third aspect or various possible implementations of the third aspect. The communication interface is used for communicating with other modules outside the chip.

In particular, the chip provided in the embodiments of the present application further includes a memory for storing a computer program or instructions.

Any one of the above-provided apparatuses, computer storage media, computer program products, chips, or communication systems is configured to execute the above-provided corresponding methods, and therefore, the beneficial effects that can be achieved by the apparatuses, the computer storage media, the computer program products, the chips, or the communication systems can refer to the beneficial effects of the corresponding schemes in the above-provided corresponding methods, and are not described herein again.

Drawings

Fig. 1 is a schematic structural diagram of a communication system according to an embodiment of the present application;

fig. 2-4 are schematic structural diagrams of a communication system according to an embodiment of the present application;

fig. 5-11 are schematic flow charts of a traffic flow routing control method provided in an embodiment of the present application;

fig. 12 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 13 is a schematic structural diagram of another communication device according to an embodiment of the present application;

fig. 14 is a schematic structural diagram of another communication device according to an embodiment of the present application;

fig. 15 is a schematic structural diagram of a chip according to an embodiment of the present application.

Detailed Description

In the embodiments of the present application, terms such as "first" and "second" are used to distinguish the same or similar items having substantially the same function and action. For example, the first address and the second address are only used for distinguishing different addresses, and the order of the addresses is not limited. Those skilled in the art will appreciate that the terms "first," "second," etc. do not denote any order or quantity, nor do the terms "first," "second," etc. denote any order or importance.

It is noted that, in the present application, words such as "exemplary" or "for example" are used to mean exemplary, illustrative, or descriptive. Any embodiment or design described herein as "exemplary" or "e.g.," is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.

The network architecture and the service scenario described in the embodiment of the present application are for more clearly illustrating the technical solution of the embodiment of the present application, and do not form a limitation on the technical solution provided in the embodiment of the present application, and as a person of ordinary skill in the art knows that along with the evolution of the network architecture and the appearance of a new service scenario, the technical solution provided in the embodiment of the present application is also applicable to similar technical problems.

In the present application, "at least one" means one or more, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone, wherein A and B can be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, c may be single or multiple.

The technical scheme of the embodiment of the application can be applied to various communication systems, for example: code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), single carrier frequency division multiple access (SC-FDMA), and other systems. The term "system" may be used interchangeably with "network". CDMA systems may implement wireless technologies such as Universal Terrestrial Radio Access (UTRA), CDMA2000, and the like. UTRA may include Wideband CDMA (WCDMA) technology and other CDMA variant technologies. CDMA2000 may cover the Interim Standard (IS) 2000(IS-2000), IS-95 and IS-856 standards. TDMA systems may implement wireless technologies such as global system for mobile communications (GSM). The OFDMA system may implement wireless technologies such as evolved universal terrestrial radio access (E-UTRA), Ultra Mobile Broadband (UMB), IEEE 802.11(Wi-Fi), IEEE 802.16(WiMAX), IEEE802.20, Flash OFDMA, etc. UTRA and E-UTRA are UMTS as well as UMTS evolved versions. Various versions of 3GPP in Long Term Evolution (LTE) and LTE-based evolution are new versions of UMTS using E-UTRA. The 5G communication system, New Radio (NR), is the next generation communication system under study. In addition, the communication system can also be applied to future-oriented communication technologies, and the technical solutions provided by the embodiments of the present application are all applied.

The system architecture and the service scenario described in the embodiment of the present application are for more clearly illustrating the technical solution of the embodiment of the present application, and do not form a limitation on the technical solution provided in the embodiment of the present application, and as a person of ordinary skill in the art knows that along with the evolution of the network architecture and the appearance of a new service scenario, the technical solution provided in the embodiment of the present application is also applicable to similar technical problems. In the embodiment of the present application, the method provided is applied to an NR system or a 5G network as an example.

As shown in fig. 1, fig. 1 shows an architecture diagram of a communication system provided by an embodiment of the present application, where the communication system includes: the terminal 10 accesses a Core Network element 30 in a Core Network (CN) 1 through an access Network gateway 20 by the terminal 10. The access network gateway 20 is a gateway in the wired network 2 (which may also be referred to as a fixed network or a fixed network). The terminal 10 accesses the wired network 2 through a wired access network. The terminal 10 accesses the core network 1 through a Radio (RAN) network.

In addition, in a specific implementation process, the communication system may further include: a user plane network element 40, and at least one Data Network (DN) connected to the user plane network element 40. The at least one data network may be an operator network providing data transmission services for the terminal 10. Wherein the terminal 10 accesses the core network 1 through an access network gateway 20. The core network 1 is used to provide services to the terminal 10. The core network 1 comprises network elements serving the terminal 10. The at least one data network includes: a data network 50 for core network routing and a data network 60 for local routing.

The core network element 30 may provide the terminal 10 with a routing policy so that the terminal 10 determines whether the traffic flow of the terminal 10 is transmitted by using the core network routing policy or the local routing policy. The core network element 30 may include a Control Plane network element Function (CP) element in the core network 1. For example, the core network element 30 may include any one of a mobility management element, a policy control element, or a session management element.

It should be understood that the Core network 1 in the communication system may be a 5G Core network (5G Core, 5GC) or a fourth generation (4th generation, 4G) Core network (e.g., Evolved Packet Core (EPC)).

The session management network element and the mobility management network element may be Mobility Management Entities (MMEs) in the 4G core network. The Policy control network element may be a Policy and Charging Rules Function (PCRF). That is, in the 4G core network, the MME has both a session management function and a mobility management function. In the 4G core network, the user plane network element may be a public data network gateway (PDN GW, PGW) or a Serving Gateway (SGW).

The network element or entity corresponding to the mobility management network element in the 5G core network may be an access and mobility management function (AMF) network element in the 5GC, and the network element or entity corresponding to the session management network element may be a Session Management Function (SMF) network element in the 5GC, and the network element or entity corresponding to the Policy control network element may be a Policy Control Function (PCF) network element in the 5 GC. The user plane network element may be a User Plane Function (UPF) network element.

The subsequent core network supports fixed/wired network access in addition to wireless (RAN) access. The convergence of a fixed network and a mobile network (referred to as "fixed-mobile convergence") has the following three scenarios:

in scenario one, as shown in fig. 2, the solid-mobile fusion adopts an integrated architecture: taking a terminal as a Fixed network home Gateway (FN-RG), an access network Gateway 20 as a Broadband Network Gateway (BNG), and the FN-RG is accessed to 5GC through a wired access network, a BNG, and a Fixed Mobile Interworking Function (FMIF). Specifically, as shown in fig. 2, a Customer Premises Equipment (CPE) (e.g., FN-RG) is accessed to the BNG through a wired access network/fixed network access network (wired AN). The BNG is connected to AAA, BPCF, and FMIF. Wherein, FMIF comprises FMIF-CP and FMIF-UP. Since the BNG has a offloading interface in the scenario shown in fig. 2, offloading of the traffic flow from the FN-RG can be implemented, the scenario shown in fig. 2 includes: core network routing paths and local routing paths. The core network routing path comprises the following paths: and the UPF network element is connected with the FMIF-UP through an N3 interface, the UPF network element is connected with the SMF network element through an N4 interface, and the UPF network element is connected with the DN1 network element. Thus if the BNG determines that core network routing policy is being used for traffic from the FN-RG, the traffic is transmitted to FMIF-UP, from which it is transmitted to DN1 through the UPF network element. The local routing path comprises the following paths: the BNG is connected to DN2 through an a10 interface. Thus if the BNG determines that the local routing policy is used for transmission of the traffic from the FN-RG, the traffic is transmitted to the DN 2. Due to the connection between the FMIF-CP and the AMF network element, the AMF network element can send the routing strategy to the FMIF after acquiring the routing strategy, and the FMIF forwards the routing strategy to the BNG. The AMF network element connected with the FMIF-CP through the N1 interface and the N2 interface forms a control plane connection between the FMIF and the core network.

The CPE in the embodiment of the present application may be a UE, a Personal Computer (PC), or a Set Top Box (STB).

It should be noted that, in the embodiment of the present application, transmitting a service flow by using a local routing policy may be understood as: and transmitting the service flow by adopting a fixed network. The wired access network, the BNG, the Authentication, Authorization and Accounting (AAA), the Broadband Policy Control Function (BPCF), and the FMIF may belong to a fixed network. It should be understood that, in fig. 2, for example, AAA and BPCF are merged into the fixed network, and of course, the AAA and BPCF may also be merged into the 5G core network side, in which case the fixed network side does not have the capability of authenticating the FN-RG itself, and BNG still retains the capability of allocating IP addresses to the FN-RG. For the specific allocation procedure of the FN-RG source IP address, refer to the detailed description in the following embodiments, which are not repeated herein.

In scenario two, as shown in fig. 3, the solid-moving fusion adopts a fusion architecture: taking an FN-RG as a terminal and an Access network gateway as an a-AGF as an example, the FN-RG is accessed to the 5GC through a wired Access network and an Adaptive-Access gateway function (a-AGF). Fig. 3 differs from fig. 2 in that: the FN-RG is accessed to the 5GC through a wired access network, and an a-AGF. And the routing strategy is sent to the A-AGF by the PCF network element through the AMF network element, and the A-AGF is used as a shunting point. BNG is fused to A-AGF, FMIF is absent, and A-AGF possesses the sum of the functions of BNG + FMIF. Specifically, the FN-RG is connected with the A-AGF through a wired access network. The wired Access device and the a-AGF may also have an Access Resource Control Function (ARCF). And the A-AGF and the AMF network element establish control plane connection through an N1 interface and an N2 interface. And the A-AGF and the UPF network element establish user plane connection through an N3 interface, the UPF network element is connected with the SMF network element through an N4 interface, and the UPF network element is connected with the DN1 network element. A-AGF is linked to DN 2. It will be appreciated that in the architecture shown in fig. 3, the a-AGF determines that the traffic flow from the FN-RG, if transmitted using core network routing policies, will be transmitted to the DN1 by the UPF network element. If the a-AGF determines that the traffic flow from the FN-RG is transmitted using the local routing policy, the a-AGF transmits the traffic flow directly to the DN 2. A-AGF does not have a shunting interface, and a shunting interface needs to be added. For example, BNG is fused to A-AGF.

It should be understood that in the architecture shown in fig. 3, AAA and BPCF may remain on the fixed network side, in which case all interactions between BNG and FMIF are supported inside a-AGF, and all BNG or FMIF step executions are replaced by a-AGF. Of course, the AAA and BPCF may also remain on the 5GC side.

In a third scenario, as shown in fig. 4, the solid-mobile convergence shown in fig. 4 adopts a convergence architecture — in fig. 3, the terminal is a 5G-RG, and the 5G-RG is accessed to the 5GC through a wired access network and an access network gateway 5G AGF. Fig. 4 differs from fig. 2 and 3 in that: in fig. 4, the 5G-RG is used as a splitting point, that is, the 5G-RG can split the received traffic flow to determine whether the traffic flow is transmitted by using a core network routing policy or a local routing policy. In fig. 4 the 5G-RG is connected to the Direct (Direct) -AGF (D-AGF) via a wired access device. The 5G-RG is connected with the AMF network element through an N1 interface. The D-AGF comprises AGF-CP and AGF-UP. The AGF-CP and the AMF network element establish a core network control plane connection through an N2 interface, and the user plane connection between the AGF-UP and the core network comprises the following steps: the connection between the AGF-UP and the UPF network element is established through an N3 interface, the connection between the UPF network element and the SMF network element is established through an N4 interface, and the connection between the UPF network element and the DN1 network element is established. The AGF-UP also establishes a user plane connection with DN2 to transport traffic from the 5G-RG through local routing policies.

In fig. 4, the routing policy of the control plane of 5GC is sent to D-AGF by PCF network element through AMF network element, and D-AGF further sends the routing policy to 5G-RG, 5G-RG as a shunting point. D-AGF does not have a shunting interface, and a shunting interface needs to be added.

Furthermore, as shown in fig. 2 to 4, the 5G network architecture may further include: a Policy Control Function (PCF) Network element, an authentication server Function (AUSF) Network element, a Unified Data Repository (UDR), a Unified Data Management (UDM) Network element, or a Binding Support Function (BSF), a Network Repository storage Function (NRF) Network element, an Application Function (AF), a Network Slice Selection Function (NSSF) Network element, which is not specifically limited in this embodiment.

Wherein, the terminal communicates with the AMF network element through an N1 interface (N1 for short). The AMF entity communicates with the SMF network element over an N11 interface (abbreviated N11). The SMF network elements communicate with one or more UPF network elements over an N4 interface (abbreviated N4). Any two UPF network elements of the one or more UPF network elements communicate via an N9 interface (abbreviated as N9). The UPF network element communicates with a Data Network (DN) managed by the AF network element through an N6 interface (N6 for short). The terminal accesses the network through an access device (for example, RAN device), and the access device communicates with the AMF network element through an N2 interface (abbreviated as N2). The SMF network element communicates with the PCF network element through an N7 interface (N7 for short), and the PCF network element communicates with the AF network element through an N5 interface. The access equipment communicates with the UPF network element through an N3 interface (abbreviated as N3). Any two AMF network elements communicate with each other through an N14 interface (N14 for short). The SMF network elements communicate with the UDM over an N10 interface (abbreviated N10). The AMF network element communicates with the AUSF through an N12 interface (abbreviated as N12). The AUSF network element communicates with the UDM network element via an N13 interface (abbreviated N13). The AMF network element communicates with the UDM network element via an N8 interface (N8 for short).

It should be understood that in the network architectures shown in fig. 2-4, the control plane network elements may also interact using a servitization interface. For example, the AMF network element, the SMF network element, the UDM network element, or the PCF network element use a service interface for interaction. For example, the service interface provided by the AMF network element to the outside may be Namf. The service interface externally provided by the SMF network element may be Nsmf. The external serving interface provided by the UDM network element may be Nudm. The service interface externally provided by the PCF network element may be Npcf. It should be understood that the related descriptions of the names of the various servitization interfaces can refer to the 5G System architecture (5G System architecture) diagram in the 23501 standard, which is not repeated herein.

It should be noted that fig. 2 to fig. 4 are only exemplary illustrations of a UPF network element and an SMF network element. Of course, the UPF network element and the SMF network element may include multiple UPF network elements and multiple SMF network elements, for example, the SMF network element 1 and the SMF network element 2 are included, which is not specifically limited in this embodiment of the present application.

It should be noted that the access device, the AMF network element, the SMF network element, the UDM network element, the UPF network element, the PCF network element, and the like in fig. 2 to fig. 4 are only names, and the names do not limit the device itself. In the 5G network and other future networks, the network elements corresponding to the access device, the AMF network element, the SMF network element, the UDM network element, the UPF network element, and the PCF network element may also be other names, which is not specifically limited in this embodiment of the present application. For example, the UDM network element may also be replaced by a user home server (HSS) or a User Subscription Database (USD) or a database entity, and the like, which are described herein in a unified manner and will not be described in detail later.

The AMF network element is mainly responsible for mobility management in the mobile network, such as user location update, user registration network, user handover, etc.

The SMF network element is mainly responsible for session management in the mobile network, such as session establishment, modification, and release. The specific functions include allocating an IP address to a user, selecting a UPF network element providing a message forwarding function, and the like.

The PCF network element is responsible for providing policies, such as quality of service QoS policies, slice selection policies, etc., to the AMF network element and the SMF network element.

The UDM network element is used to store user data, such as subscription information, authentication/authorization information.

The UPF network element is mainly responsible for processing user messages, such as forwarding, charging, and the like.

The DN refers to an operator network providing a data transmission Service for a user, such as an IP Multimedia Service (IMS), the Internet, and the like.

The terminal accesses the Data Network (DN) by establishing a session (PDU session) between the terminal to the RAN to the UPF Network element to the DN.

The terminal (terminal) related to the embodiments of the present application may include various devices having wireless communication functions and capable of connecting to a mobile network. For example, a handheld device, an in-vehicle device, a wearable device, a computing device, or other processing device connected to a wireless modem; subscriber units (subscriber units), cellular phones (cellular phones), smart phones (smart phones), wireless data cards, Personal Digital Assistants (PDAs), tablet computers, wireless modems (modems), handheld devices (handhelds), laptop computers (laptops), cordless phones (cordless phones) or Wireless Local Loop (WLL) stations, Machine Type Communication (MTC) terminals, user equipment (user equipment, UE), mobile stations (mobile stations, MS), terminal equipment (terminal device), relay user equipment (relay user equipment) may also be included. In the following embodiments of the present application, the first terminal is a 5GC capable user equipment. For example, the terminal is illustrated as a relay user equipment. For example, the relay user equipment may be a 5G home gateway (RG).

The following provides a brief description of the network elements involved in the embodiments of the present application:

1. the user plane network element is used for packet routing and forwarding, quality of service (QoS) processing of user plane data, and the like.

In a 5G communication system, the user plane network element may be a UPF network element, and in a future communication system, the UPF network element may also have another name, which is not limited in this application.

2. And the data network element is used for providing a network for transmitting data.

In a 5G communication system, the data network element may be a DN. In future communication systems, the data network element may still be DN, or may also have other names, which is not limited in this application.

3. A mobility management network element is mainly used for mobility management, access management, and the like, and may be used to implement other functions, such as functions of lawful interception, access authorization/authentication, and the like, in addition to session management in Mobility Management Entity (MME) functions.

In the 5G communication system, the mobility management element may be an AMF element. In future communication systems, the mobility management element may still be an AMF element, or may also have another name, which is not limited in this application.

4. The session management network element is mainly used for session management, allocation and management of an Internet Protocol (IP) address of a terminal, selection of a termination point of an interface capable of managing a user plane function, policy control and charging function, downlink data notification, and the like.

In the 5G communication system, the session management network element may be an SMF network element, and in a future communication system, the session management network element may also have another name, which is not limited in this application.

5. The policy control network element is a unified policy framework for guiding network behavior, and provides policy rule information for control plane function network elements (such as AMF and SMF network elements).

In a 4G communication system, the policy control network element may be replaced by a Policy and Charging Rules Function (PCRF) network element. In future communication systems, the policy control network element may still be a PCF network element, or may also have another name, which is not limited in this application.

6. Binding the functional network element: for finding the PCF with which the session is associated.

In the 5G communication system, the binding support network element may be a Binding Support Function (BSF) network element. In a future communication system, the binding support network element may still be a BSF network element, or may also have another name, which is not limited in this application.

7. And the authentication server is used for authenticating service, generating a secret key to realize bidirectional authentication on the terminal equipment and supporting a uniform authentication framework.

In a 5G communication system, the authentication server may be an authentication server function (AUSF) network element. In a future communication system, the authentication server function network element may still be an AUSF network element, or may also have another name, which is not limited in this application.

8. And the data management network element is used for processing the terminal identification, the access authentication, the registration, the mobility management and the like.

In the 5G communication system, the data management network element may be a Unified Data Management (UDM) network element. In future communication systems, the unified data management may still be a UDM network element, or may also have other names, which is not limited in this application.

9. And the application network element is used for carrying out data routing influenced by application, accessing the network open function network element, carrying out strategy control by interacting with the strategy framework and the like.

In the 5G communication system, the application network element may be an Application Function (AF) network element. In a future communication system, the application network element may still be an AF network element, or may also have another name, which is not limited in this application.

10. And the network storage network element is used for maintaining real-time information of all network function services in the network.

In the 5G communication system, the network storage network element may be a Network Registration Function (NRF) network element. In future communication systems, the network storage network element may still be an NRF network element, or may also have another name, which is not limited in this application.

It is to be understood that the above network elements or functions may be network elements in a hardware device, or may be software functions running on dedicated hardware, or virtualization functions instantiated on a platform (e.g., a cloud platform).

Further, the AF network element is abbreviated as AF, the BSF network element is abbreviated as BSF, the NRF network element is abbreviated as NRF, and the PCF network element is abbreviated as PCF. That is, AF described later in this application may be replaced with an application network element, BSF may be replaced with a binding support network element, NRF may be replaced with a network storage network element, and PCF may be replaced with a policy control network element.

The steps executed by the core network element in the service flow routing control method provided in the embodiment of the present application may also be executed by a chip applied to the core network element. The steps executed by the access network gateway can also be executed by a chip applied to the access network gateway, and the steps executed by the terminal in a traffic flow routing control method can also be executed by a chip applied to the terminal. The following embodiments take an example in which a traffic flow routing control method is executed by a core network element, an access network gateway, and a terminal. For the implementation method in which the device is a chip in a core network element, a chip in an access network gateway, or a chip in a terminal, reference may be made to specific descriptions of the device for the core network element, the access network gateway, and the terminal, and no repeated description is given.

In conjunction with the communication systems shown in fig. 2 to fig. 4, as shown in fig. 5, fig. 5 illustrates a traffic flow routing control method provided in an embodiment of the present application, where the method includes:

step 101, a core network element obtains a routing policy (may also be referred to as a offloading policy) of a terminal according to any one or more of identification information of the terminal, an access type of the terminal, and location information of the terminal. The routing strategy is a core network routing strategy and/or a local routing strategy.

The terminal in step 101 of the embodiment of the present application may be an FN-RG as shown in fig. 2 or fig. 3. Alternatively, the terminal in the embodiment of the present application may be a 5G-RG as shown in fig. 4. The core network element may be any one of a PCF network element, an AMF network element, or an SMF network element. The location information of the terminal includes at least one of a line identification, or geographical location information. The core network element may determine whether the terminal supports the local routing according to the location information of the terminal.

It should be noted that, on one hand, in the embodiment of the present application, a core network element indicates, to a terminal or an access network gateway, that the priority of a core network routing policy is higher than the priority of a local routing policy, and then the terminal or the access network gateway may determine to preferentially transmit a service flow using the core network routing policy. When the core network routing strategy is adopted to transmit the service flow, the requirement of the service flow cannot be met, or the burden of the core network side is greater than a preset threshold value, the terminal or the access gateway can determine that the local routing strategy is adopted to transmit the service flow.

Or on the other hand, if the core network element indicates to the terminal or the access network gateway that the priority of the local routing policy is higher than the priority of the core network routing policy, the terminal or the access gateway may determine to preferentially transmit the traffic flow by using the local routing policy. When the local routing strategy is adopted to transmit the service flow and cannot meet the requirement of the service flow, or the burden of the fixed network side is greater than a preset threshold value, the terminal or the access gateway can determine to adopt the core network routing strategy for transmission.

The identification information of the terminal in the embodiment of the application is used for identifying the terminal. The identification information of the terminal may be one or more of: an Internet Protocol (IP), a subscription permanent identifier (SUPI), a Permanent Equipment Identifier (PEI), a General Public Subscription Identifier (GPSI), an International Mobile Subscriber Identifier (IMSI), an International Mobile Equipment Identifier (IMEI), an IP address, and a mobile station international integrated services digital network number (MSISDN). In the following embodiments, the description of the present disclosure may be referred to for identification related to a terminal, and details are not repeated.

For example, the access type of the terminal may be any one or more of a fixed network access (wired access), a 3GPP access (access), and a Non- (Non) -3GPP access.

The core network routing strategy is used for indicating the service flow of the terminal to be transmitted through the core network, and the local routing strategy is used for indicating the service flow of the terminal to be transmitted through the local routing.

It should be noted that the service flow of the terminal may be a service flow of the terminal itself, or may also be a service flow received by the terminal from the CPE, which is not limited in this embodiment of the present application.

Step 102, the core network element sends a routing strategy to an access network gateway or a terminal.

It will be appreciated that when the method is applied to the architecture shown in figure 2 or figure 3, the core network element sends the routing policy to the access network gateway. Wherein, for the architecture shown in fig. 2, the access network gateway may be a BNG. For the architecture shown in fig. 3, the access network gateway may be an a-AGF. When the method is applied to the architecture shown in fig. 4, the network element of the core network sends a routing policy to the terminal, and the terminal is 5G-RG at this time.

It is understood that, if the core network element is a PCF network element, the routing policy may be sent to the access network gateway through the AMF network element after it generates the routing policy through step 101. For the architecture shown in fig. 4, the core network element may send the routing policy to the D-AGF through the AMF network element, and then send the routing policy to the 5G-RG by the D-AGF.

The core network routing strategy comprises the following steps: a core network routing indication and/or flow description information, wherein the core network routing indication is used for indicating a service flow determined by transmitting the flow description information through the core network. The local routing policy includes: local routing indication and/or flow description information, wherein the local routing indication is used for indicating a service flow determined by transmitting the flow description information through the local routing.

Illustratively, the flow description information includes any one or more of the following information: an application identifier, a flow five-tuple identifier, a Virtual Local Area Network (VLAN) tag, a session type, an access line identifier, and an access point identifier. For example, the flow quintuple includes at least one of IP quintuples. The session types include: any one or more of a PPPoE session, an IPoE session, an IP session, a GRE session, or an Ethernet session. The access Line identification may be a Line ID or a Line (circuit) ID. The access point Identifier may be a Wireless Local Area Network (WLAN) Service Set Identifier (SSID), an HESSID. For example, if there is a traffic flow 1 corresponding to some VLAN tag in the core network element and the local routing policy needs to be executed, the core network element determines that the traffic flow 1 needs to execute the local routing policy. If a core network element has a service flow 2 corresponding to some VLAN tag and needs to execute a core network routing policy, the core network element determines that the service flow 2 needs to execute a local routing policy.

It should be noted that, in this embodiment, the core network element may further determine a routing policy of the service flow according to the priority of the service flow. For example, a core network element determines that a low priority traffic flow (e.g., a low value, low QoS requirement, such as a web browsing traffic flow) employs a local routing policy, and a high priority traffic flow employs a core network routing policy. Or the core network element may also determine the routing policy of the service flow according to the reliability of the service flow. For example, high reliability traffic employs core network routing strategies. The low reliability traffic employs a local routing policy. The core network element may determine the reliability or priority of the service flow according to the information of the service flow. For a specific manner of determining the reliability or priority of the service flow, reference may be made to descriptions in the prior art, and details are not described here.

Step 103, the access network gateway receives the routing policy of the terminal from the network element of the core network. Wherein the routing policy is a core network routing policy and/or a local routing policy.

And step 104, the access network gateway processes the service flow of the terminal according to the routing strategy.

And 105, the terminal receives the routing strategy of the terminal from the access network gateway.

And 106, the terminal processes the service flow of the terminal according to the routing strategy.

In an alternative embodiment, as shown in fig. 5, the method provided in this embodiment of the present application further includes, before step 101:

step 107, the core network element receives a request message, where the request message includes any one or more of the following information: identification information of a terminal, an access type of the terminal, or location information of the terminal.

It should be noted that, if the core network element is a PCF network element or an SMF network element, the request message may be sent by an AMF network element.

Because the PCF network element can formulate a routing policy, when the core network element is an SMF network element or an AMF network element, the SMF network element or the AMF network element interacts with the PCF network element to obtain the routing policy of the terminal from the PCF network element.

In another alternative embodiment, with reference to fig. 5, as shown in fig. 6, the method provided in this embodiment of the present application further includes:

and step 108, the access network gateway sends the capability information of the access network gateway to the network element of the core network.

The capability information is used for indicating whether the access network gateway has the capability of allocating the first address for the terminal or the service local routing capability. The first address is an address allocated to the terminal by the access network gateway.

It should be understood that the access network gateway may actively send the capability information of the access network gateway to the core network element. The access network gateway may also send, by the core network element to the access network gateway, a request for requesting the capability information of the access network gateway, and then the access network gateway sends, based on the request for requesting the capability information of the access network gateway, to the core network element.

It should be understood that, in the embodiments shown in fig. 3 or fig. 4, when obtaining the routing policy, the network element of the core network in the embodiment of the present application may combine the capability information of the access network gateway (for example, the access network gateway is an a-AGF in fig. 3, and the access network gateway is a D-AGF in fig. 4). If the core network element is a PCF network element, the access network gateway can send the capability information of the access network gateway to the PCF network element through the AMF network element or the SMF network element. If the core network element is an AMF network element, the access network gateway can directly send the capability information of the access network gateway to the AMF network element.

Step 109, the network element of the core network obtains the capability information of the access network gateway.

Specifically, step 109 in the embodiment of the present application may be implemented by the following steps: the core network element receives capability information from the access network gateway.

Correspondingly, step 101 in the embodiment of the present application may also be implemented by: and the core network element acquires the routing strategy according to any one or more of the identification information of the terminal, the access type of the terminal and the position information of the terminal and the capability information.

Illustratively, the location information of the terminal may be at least one of a Line identification (Line ID) or geographical location information. The core network element may determine whether to support the local routing policy according to the location information of the terminal.

Specifically, the access network gateway has a capability of allocating a first address to the terminal or a service local routing capability, and the core network element determines that the routing policy is a local routing policy. Or/and the access network gateway does not have the capability of allocating the first address for the terminal or the service local routing capability, and the core network element determines the routing strategy as the core network routing strategy.

It should be noted that the capability information of the access network gateway may be sent to the core network element along with the request message in step 107, or may be sent to the core network element by using a separate message.

In addition, if the core network element determines that the access type of the terminal is fixed network access, the core network element determines that the routing policy is a local routing policy.

It should be noted that, in this embodiment of the application, if the capability information of the access network gateway indicates that the access network gateway does not have the capability of allocating the first address to the terminal or the service local routing capability, but the access type of the terminal is wired access, the fixed network is accessed or the local routing policy is determined to be supported according to the location information of the terminal, and the core network element also still determines the routing policy as the core network routing policy.

It should be noted that the capability information of the access network gateway, the location information of the terminal, and the access type of the terminal may exist at the same time, or may exist only one type, and may be used in combination with the identifier information of the terminal, or may not be used in combination with the identifier information of the terminal. The embodiments of the present application do not limit this. For example, if the core network element determines that the access network gateway has the capability of allocating the first address to the terminal or the service local routing capability, and the access type of the terminal is the fixed network access, the core network element determines that the routing policy is the local routing policy.

It should be noted that, if the core network element may determine the access type of the terminal, the location information of the terminal, or the access network gateway to which the terminal is connected according to the identifier information of the terminal, the core network element determines the routing policy of the terminal according to the identifier information of the terminal. For example, after the core network element determines the access network gateway to which the terminal is connected according to the identification information of the terminal, if the core network element has the capability information of the access network gateway, the core network element may determine the routing policy of the terminal according to the capability information of the access network gateway.

In a possible example 1, the traffic flow is transmitted by the policy through the core network, and step 104 in the embodiment of the present application can be implemented by: the access network gateway processes the service flow by adopting a second address of the terminal and sends the processed service flow to the fixed-mobile network interaction function, wherein the second address is an address allocated to the terminal by the core network, namely the second address is an address used when the service flow is transmitted in the core network. It should be understood that after receiving the traffic stream processed by the second address, the fixed-mobile network interworking function transmits the traffic stream to the UPF network element, so that the UPF network element transmits the traffic stream to the DN. It will be appreciated that example 1 may be applicable to an architecture as shown in figure 2, with the access network gateway having a scenario of a second address of the terminal. Furthermore, in example 1, if the access network gateway does not have the second address of the terminal, the access network gateway encapsulates the traffic flow with the first address of the terminal. And the access network gateway sends the service flow encapsulated by the first address to the FMIF. After receiving the service flow encapsulated by the first address, the FMIF initiates a new PDU session according to the existing process, replaces the first address of the service flow with the obtained second address, and transmits the service flow to a UPF network element determined when the PDU session is newly established by the second address.

For example, if the first address is a source IP address and the second address is a 5G IP address, the service flow is transmitted to the fixed-mobile network interworking function using the 5G IP address if the access network gateway has the 5G IP address. And if the access network gateway does not have the 5G IP address, transmitting the service flow to the FMIF by adopting the source IP address, and after receiving the service flow encapsulated by adopting the source IP address, the FMIF replaces the source IP address of the service flow by adopting the 5G IP address and sends the service flow to the UPF network element.

In a possible example 2, the traffic flow is transmitted by the policy through the core network, and step 104 in the embodiment of the present application can be implemented by: and the access network gateway processes the service flow by adopting the second address of the terminal and sends the processed service flow to the user plane functional network element.

In a possible example 3, if the traffic flow is transmitted through the local routing policy, step 104 in this embodiment of the present application may be implemented as follows: the access network gateway transmits the traffic stream to the data network using the first address of the terminal. It should be understood that the data network at this time is the data network of the access network gateway on the fixed network side.

In a possible example 4, corresponding to fig. 4, where the routing policy is a core network routing policy, step 106 in this embodiment of the present application may be implemented specifically by: and the terminal adopts the second address to package the service flow of the terminal, and the packaged service flow is transmitted through the user plane functional network element. The specific process is as follows: and the terminal adopts the second address to package the service flow of the terminal, transmits the service flow packaged by the second address to the D-AGF, and then the D-AGF can transmit the service flow packaged by the second address to the UPF network element with a user plane tunnel with the D-AGF. It should be noted that, a user plane tunnel is provided between the terminal and the UPF network element having a user plane connection with the D-AGF, and the user plane tunnel includes: terminal → D-AGF → UPF network element. It should be noted that, if the terminal does not have the second address, the terminal encapsulates the service flow with the first address, and transmits the service flow encapsulated with the first address to the D-AGF, and then the D-AGF may replace the address of the service flow encapsulated with the first address with the second address, and the D-AGF transmits the service flow with the second address to the UPF network element having the user plane tunnel with the D-AGF.

In a possible example 5, corresponding to fig. 4, where the routing policy is a local routing policy, step 106 in this embodiment of the present application may be specifically implemented by: the terminal adopts the first address to package the service flow of the terminal; and transmitting the encapsulated service flow to a data network through an access network gateway. The access network gateway here may be a D-AGF in fig. 4.

The above examples describe specific procedures when the terminal or the access network gateway transmits a service flow, and the terminal or the access network gateway needs to obtain a first address and a second address of the terminal when transmitting the service flow. The following embodiments will describe how the terminal or access network gateway obtains the first address and the second address of the terminal:

in a possible embodiment, as shown in fig. 7, the method provided in the embodiment of the present application further includes:

step 110, the network element of the core network allocates a second address to the terminal.

It should be noted that, in the session management process, the core network element allocates the second address to the terminal. Specifically, the session management network element or the user plane network element allocates a second address to the terminal in the session management process. The session management procedure may refer to a PDU session setup procedure or a PDU session update procedure. For example, in the architecture shown in fig. 4, the PDU session management procedure may be initiated by the terminal. In the architecture shown in fig. 3 or fig. 2, the access network gateway initiates a connection request according to a local routing policy or a core network routing policy, and acquires the second address of the terminal through a PDU session.

And step 111, the access network gateway acquires a second address allocated to the terminal by the core network element.

It should be appreciated that the access network gateway may obtain the second address assigned to the terminal during PDU session management.

And step 112, the access network gateway sends the second address to the terminal according to the core network routing strategy.

It should be understood that the access network gateway in step 112 may be a D-AGF, which is suitable for a scenario in which the terminal performs offloading, and the access network gateway sends the second address to the terminal if it determines that the traffic flow is transmitted by using the core network routing policy.

And 113, the terminal acquires a second address allocated to the terminal by the network element of the core network.

The terminal may obtain, from the core network element, a second address allocated by the core network element to the terminal in a session management process. Of course, the terminal may also obtain the second address allocated to the terminal by the core network element from the access network gateway, which is not limited in this embodiment of the present application. In case that the terminal can obtain the second address allocated by the core network element for the terminal from the core network element in the session management process, step 112 can be omitted.

In an alternative embodiment, as shown in fig. 7, the method provided in this embodiment further includes:

step 114, the terminal sends a second request message to the access network gateway, where the second request message is used to request the terminal to allocate the first address.

Illustratively, in one aspect, the terminal may perform step 104 after the terminal completes authentication with the access network gateway. On the other hand, when the terminal determines that the traffic flow needs to be transmitted by using the local routing policy and the terminal does not have the first address, the terminal performs step 114 according to the local routing policy. Optionally, the second request message may carry identification information of the terminal and an access type of the terminal.

And step 115, the access network gateway allocates a first address to the terminal according to the second request message.

And step 116, the access network gateway sends the first address to the terminal according to the second request message.

For example, the access network gateway may send the first address to the terminal in a PPPoE procedure or an IPoE procedure or a Dynamic Host Configuration Protocol (DHCP) procedure.

In an optional embodiment, the method provided in the embodiment of the present application further includes: the core network element generates first indication information, and the first indication information is used for indicating that an access network gateway is allowed to allocate a first address for the terminal. And the core network element sends the first indication information to the access network gateway. This case may be applied to the architecture shown in fig. 3 or fig. 4.

Illustratively, the first indication information may be a local routing permission indication, or a local routing policy indication, or an authentication success indication. It should be understood that when the access network gateway has the capability of assigning the first address to the terminal, the core network element may indicate whether the access network gateway is allowed to assign the first address to the terminal by using the first indication information. I.e. even if the access network gateway has the first address assigned to the terminal, the access network gateway does not assign the first address to the terminal if the core network element indicates that the access network gateway is not allowed to assign the first address to the terminal.

It should be noted that, in the embodiment of the present application, no matter the access network gateway or the terminal, when transmitting the service flow, the service quality parameter of the terminal also needs to be satisfied. Therefore, in another possible embodiment of the present application, as shown in fig. 8, a method provided in this embodiment of the present application further includes:

step 117, the core network element sends the quality of service parameter to the terminal or the access network gateway.

It should be understood that, for the architecture shown in fig. 4, the network element of the core network may send the quality of service parameters to the terminal directly, or may send the quality of service parameters to the terminal through the D-AGF. The qos parameter may be a qos parameter of the terminal in the core network, or a qos parameter when the terminal transmits in the fixed network.

The quality of service parameters may include: any one or more of bandwidth, latency, Maximum Bit Rate (TMBR).

Step 118, the access network gateway receives the quality of service parameters from the core network element.

Accordingly, step 104 may be implemented by: and the access network gateway processes the service flow of the terminal according to the service quality parameters and the routing strategy, wherein the service quality parameters comprise service quality parameters of terminal granularity, and the service flow comprises the service flow transmitted by adopting the core network routing strategy and/or the service flow transmitted by adopting the local routing strategy.

And step 119, the terminal acquires the service quality parameters.

Correspondingly, step 106 in the embodiment of the present application may be specifically implemented by the following means: and the terminal processes the service flow of the terminal according to the service quality parameters and the routing strategy.

It should be noted that, whether the access network gateway or the terminal processes the service flow of the terminal according to the quality of service parameter and the routing policy specifically includes: the service flow transmitted by adopting the core network routing strategy and the service flow transmitted by adopting the local routing strategy need to meet the service quality parameter of the terminal. Taking the qos parameter as the total bandwidth value of the terminal, the total bandwidth value occupied by the traffic transmitted by the core network routing policy and the traffic transmitted by the local routing policy is less than or equal to the total bandwidth value. Taking the service quality parameter as TMBR as an example, the TMBR occupied by the service flow transmitted by the core network routing policy and the service flow transmitted by the local routing policy is smaller than the TMBR of the terminal.

As shown in fig. 9, an embodiment of the present application provides a specific embodiment of a method for controlling a service flow route, where in the embodiment, an access network gateway is a BNG, a terminal is an FN-RG, and a core network element is a PCF network element, and the method includes:

step 201, the fixed network gateway FN-RG establishes L2 connection with BNG.

The L2 connection can be established between the FN-RG and the BNG through the existing flow. The FN-RG establishes an L2 connection with the BNG through the wired access network/the fixed network access network.

Step 202, the FN-RG sends an Authentication (Authentication) Authentication request message to the BNG, so that the BNG receives the Authentication request message.

Step 203, BNG authenticates FN-RG.

Step 204, BNG assigns a source IP address for FN-RG.

It should be noted that the FN-RG may carry a request message for requesting the BNG to allocate the source IP address to the BNG in the authentication request message, or may send a request message for requesting the BNG to allocate the source IP address to the BNG after the BNG completes authentication of the FN-RG. It should be understood that the source IP address is the first address in the above embodiments.

In step 205, BNG decides to register FN-RG to 5 GC.

Step 206, BNG sends Registration request to FMIF, where the Registration request includes: identity of the FN-RG. For example, the identity of the FN-RG may be a Line ID, which is used to identify the FN-RG.

Step 207, the FMIF generates parameters which are required by 5GC registration and can be identified by 5GC according to the Line ID, and selects the AMF network element on behalf of the FN-RG.

Step 208, the FMIF sends a registration request containing the Line ID to the AMF network element.

It should be appreciated that the AMF network element forwards the registration request containing the Line ID to the AUSF network element in the 5 GC.

Step 209, the AUSF network element performs a Registration procedure (Registration procedure) to authenticate the FN-RG.

The process of authenticating the FN-RG by the AUSF network element may refer to the description in the prior art, and is not described herein again.

Step 210, after the authentication is successful, the AMF network element sends the policy request information to the PCF network element, so that the PCF network element receives the policy request information. The policy request information includes a Line ID, and the access type is set to a fixed network access (wireless access).

And step 211, the PCF network element generates an NSFO strategy or a 5GC routing strategy aiming at the FN-RG according to the Line ID or the access type.

It should be understood that the NSFO policy is the local routing policy in the above embodiment. The 5GC routing policy is the core network routing policy in the above embodiment.

Step 212, the PCF network element sends the NSFO strategy or the 5GC routing strategy of the FN-RG to the AMF network element.

Step 213, the AMF network element receives the NSFO policy or 5GC routing policy of the FN-RG from the PCF network element.

Step 214, the AMF network element sends the routing policy to the BNG. Wherein, the routing strategy comprises: the NSFO strategy of FN-RG or the 5GC routing strategy.

Step 214 in this embodiment of the present application may be specifically implemented by the following means: the AMF network element sends a Registration Accept (Registration Accept) message to the FMIF, wherein the Registration Accept message comprises: and (4) routing strategies. FMIF sends a registration accept message to BNG.

It should be understood that the routing policy may carry a mapping relationship between the identity of the FN-RG and the NSFO policy, or a mapping relationship between the identity of the FN-RG and the 5GC routing policy. Here, the identity of the FN-RG may be LineID, or may be a temporary identity allocated to the FN-RG by the 5G core network side.

In an alternative example, after the FMIF receives the routing policy, a Registration Complete message may be sent to the AMF network element.

In an optional example, the method provided in the embodiment of the present application further includes: step 215.

Step 215, the BNG initiates a connection request according to the NSFO strategy or the 5GC Routing strategy, and acquires the 5G IP address of the FN-RG through the PDU session.

In a specific example, step 215 may be specifically implemented as follows: BNG initiates a connection setup Request (Connect Request) message to FIMF. The connection setup request message is used to request the 5G core network to allocate a 5G IP address for the FN-RG. FIMF sends PDU session establishment request message to UPF network element to request to obtain 5G IP address of FN-RG. FIMF obtains the 5G IP address of the FN-RG from the UPF network element, and sends the 5G IP address of the FN-RG to the BNG. It should be understood that a PDU session can be established between the PDU session setup request message FIMF and the UPF network element. The PDU session is available for transport of traffic flows in subsequent procedures.

It should be understood that the 5G IP address is the second address in the above embodiments.

Step 216, BNG selects to make offloading decision according to either the NSFO policy or the 5GC Routing policy.

The specific step 216 can be implemented as follows: when the BNG determines that the traffic needs to go through the 5G network, step 217-step 222 are performed.

If the BNG determines that the traffic does not need to go through the 5G network, step 223 is performed.

Step 217, BNG forwards the service flow to FMIF, FMIF establishes a user plane connection from FMIF to DN1 using PDU session with UPF network element.

Step 218, BNG performs step 219 and step 220, or performs step 221 and step 222, respectively, depending on whether it possesses the 5G IP address of the matching traffic flow.

The BNG can obtain the 5G IP address of the FN-RG through step 215, or can obtain it from the FMIF after the PDU session establishment is successful (i.e., after step 218).

It should be noted that, when the BNG has the 5G IP address of the FN-RG matching the traffic flow, the BNG performs step 219 and step 220. When the BNG does not match the 5G IP address of the FN-RG of the traffic flow, the BNG performs step 221 and step 222.

Step 219, the BNG matches the service flow to the established PDU session, encapsulates the service flow through the allocated 5G IP address, and sends the encapsulated service flow to the FMIF.

Step 220, the FMIF directly matches the service flow to the selected UPF network element by the identification of the IP address.

Step 221, the BNG encapsulates the service flow by using the source IP address of the FN-RG, and sends the service flow to the FMIF.

Step 222, after receiving the service flow encapsulated by the source address, the FMIF replaces the source IP address with the obtained 5G IP address of the FN-RG, and transmits the data packet of the user plane.

It should be noted that, in step 222, the UPF network element selected by the FMIF for the packet transfer in the user plane may be a different UPF network element from that in step 215. In addition, in step 222, after receiving the service flow encapsulated by the source address, the FMIF initiates a new PDU session to obtain the 5G IP address of the FN-RG. FMIF sends the 5G IP address of the FN-RG to the BNG after obtaining the 5G IP address of the FN-RG, as an address choice for a subsequent BNG to initiate the same PDU session.

The BNG encapsulates the traffic flow with the source IP address of the FN-RG and sends the traffic flow encapsulated with the source IP address to the DN2, step 223.

It should be noted that fig. 9 illustrates an example in which AAA and BPCF remain on the fixed network side. When AAA and BPCF are merged into the 5G core network side, in this case, the fixed network side does not have the authentication capability of self on FN-RG, and BNG still retains the capability of allocating source IP address for FN-RG. Specifically, regarding the flow of allocating the source IP address of the FN-RG, reference may be made to the description of the relevant steps in fig. 10 (e.g., steps 311-313), which is not described herein again.

Referring to fig. 3, as shown in fig. 10, an embodiment of the present invention provides another specific embodiment of a traffic flow routing control method, in fig. 10, an FN-RG is accessed to a core network through a wired access network and an Adaptive AGF. The core network element is a PCF network element as an example, the routing policy of the 5GC control plane is sent by the PCF network element to the a-AGF through the AMF network element, and the a-AGF is used as a shunting point. The embodiments shown in fig. 9 and 10 differ in that: 1) the embodiments described in fig. 9 and 10 are applied in different architectures. The method depicted in FIG. 10 is applicable to the communication system depicted in FIG. 10, where BNG is fused to A-AGF, no FMIF is present, A-AGF possesses the sum of the functions of BNG + FMIF, and in the embodiment depicted in FIG. 10, no interaction between BNG and FMIF is present in the embodiment depicted in FIG. 9. 2) The split point is different. A shunting interface is added to the a-AGF, which will act as a shunting point. Depending on whether the deployment of the BNG is reserved, the add mode of the offload interface may be different. 3) In the embodiment shown in fig. 10, when the a-AGF recognizes a traffic flow, QoS control is required, that is, a TMBR satisfying the FN-RG granularity is required. 4) And when the PCF network element sends the routing strategy, the fixed network IP address allocation capacity of the A-AGF also needs to be considered. 5) And the A-AGF can be attached with whether the A-AGF has the fixed network IP address allocation capability or not in the registration request, or after the PCF network element receives the strategy request information, if the fixed network IP address allocation capability of the A-AGF is needed, the A-AGF is requested to the A-AGF through the AMF network element. 5) And after receiving the routing strategy, the AMF network element can optionally generate Fix IP allowed information by combining the relevant information and send the Fix IP allowed information to the A-AGF together with the routing strategy. The A-AGF distributes a source IP address for the FN-RG after receiving the registration success message, and sends the source IP address to the FN-RG through the PPPoE or IPoE process.

Specifically, as shown in fig. 10, taking the terminal as FN-RG and the access network gateway as a-AGF as an example, the method specifically includes:

step 301 and step 201 may be synchronized, specifically refer to step 201, and are not described herein again.

Step 302, FN-RG requests the source IP address of FN-RG from A-AGF through PPPoE flow or IPoE flow.

In step 303, the A-AGF determines to register the FN-RG to the 5 GC.

And step 304, the A-AGF generates parameters which are required by 5GC registration and can be identified by 5GC according to the Line ID, and represents the FN-RG to select the AMF network element.

Step 305, the a-AGF sends a registration request containing the Line ID to the AMF network element.

Optionally, the registration request may include a fixed network IP allocation capability (a-AGF capability) of the a-AGF.

It should be understood that the fixed network IP allocation capability of the a-AGF is the capability information of the access network gateway in the above embodiment.

And step 306, 5GC authenticating the FN-RG.

It should be understood that the a-AGF authenticates the FN-RG with the AUSF network element in the 5 GC.

Step 307, after the authentication is successful, the AMF network element sends policy request information to the PCF network element. Wherein, the strategy request information includes: the Line ID is set to a fixed network access (access type).

It should be understood that if the AMF network element receives a-AGF capability, the policy request information further includes: A-AGFcapability.

In an optional implementation manner, if the policy request information does not carry a-AGF capability, the PCF network element may request the a-AGF for its fixed network IP allocation capability.

And step 308, the PCF network element generates an NSFO strategy or a 5GC routing strategy aiming at the FN-RG according to the Line ID or the access type and the A-AGF capability.

Step 309, the PCF network element sends the nfo policy or 5GC routing policy of the FN-RG to the AMF network element.

And step 310, the AMF network element sends the identity of the FN-RG and the NSFO strategy or the 5GC Routing strategy to the A-AGF.

Wherein A-AGF is taken as a shunting point. The identity of the FN-RG can be a Line ID, and can also be a temporary identity allocated for the FN-RG by 5 GC.

In an optional implementation manner, the method in the embodiment of the present application further includes:

and 311, generating Fixed IP allowed information by the AMF network element, and sending the Fixed IP allowed information to the A-AGF. This message may also be sent to the a-AGF during the authentication procedure in step 306.

It should be understood that the Fixed IP allowed information is the first indication information in the above embodiment.

In an optional embodiment, the method provided in the embodiment of the present application further includes:

step 312, the a-AGF sends a Registration Complete message to the AMF network element.

Step 313, the A-AGF allocates a source IP address for the FN-RG based on the registration success message, or the security key received in the authentication process, or the Fixed IP allowed message.

Step 314, the a-AGF sends the source IP address to the FN-RG through PPPoE or IPoE flows.

It should be noted that step 313 may also be executed after step 314.

Step 315, the a-AGF makes a offloading decision according to the flow description information in the NSFO policy or the 5GC Routing policy in combination with the selection of the own fixed network IP capability:

specifically, step 314 may be implemented in the following manner: if the a-AGF determines that the traffic flow determined by the flow description information needs to pass through the 5G network, step 315 is executed. If the a-AGF determines that the traffic flow determined by the flow description information does not need to go through the 5G network, step 316 is performed.

The specific step 315 may be executed by selecting an appropriate step from the steps 315a to 315d according to different conditions.

Step 315a, the A-AGF initiates a new PDU session establishment request to obtain the 5G IP address of the FN-RG.

And step 315b, the A-AGF sends the obtained 5G IP address of the FN-RG to the FN-RG through PPPoE or IPoE flow.

Step 315c, the A-AGF executes IP address replacement, the source IP address of the FN-RG is replaced by the 5G IP address of the PDU conversation of the matched service flow, and the service flow is encapsulated again by the replaced 5G IP address.

Step 315d, the A-AGF sends the service flow encapsulated by the 5G IP address to the corresponding UPF network element.

[ Condition 1: if the service flow has the source IP address and there is no matching 5G IP address, the a-AGF performs step 315a, step 315c, and step 315 d.

[ Condition 2: if the service flow has the source IP address and the matching 5G IP address, the a-AGF performs step 315c and step 315 d.

[ Condition 3: if the traffic flow has no passive IP address, no matching 5G IP address ], if the a-AGF determines that the source IP address of the FN-RG is needed according to the NSFO/5 grouping policy, the a-AGF performs step 312, step 315a, step 315c, and step 315 d.

If the A-AGF determines that the source IP address of the FN-RG is not needed according to the NSFO/5G Routing policy, the 5G IP address obtained by the FN-RG can be temporarily used as the source IP address of the FN-RG, and the A-AGF performs steps 315a, 315b, and 315 d.

[ Condition 4: if the service flow has a passive IP address, and has a matching 5G IP address, if the a-AGF determines that the source IP address of the FN-RG is needed according to the NSFO/5 grouping policy, the a-AGF performs step 312, step 315c, and step 315 d. If the A-AGF determines that the FN-RG source IP address is not needed according to the NSFO/5G Routing policy, the FN-RG acquired 5G IP address can be temporarily used as the FN-RG source IP address, and the A-AGF performs step 315b and step 315 d.

Step 316, the a-AGF matches the service flow, if there is no source IP address of the FN-RG, step 312 is executed to obtain the source IP address of the FN-RG, the FN-RG source IP address is used to encapsulate the service flow, and the service flow is sent to the DN2 under the condition that the service flow is guaranteed to meet the TMBR.

It should be noted that the TMBR in step 316 is the total TMBR of the FN-RG, i.e. the TMBR is required to be satisfied for both the traffic flow using the local routing policy parameters and the traffic flow transmitted using the core network routing policy.

For example, taking the maximum bit rate as 12 bits as an example, the maximum bit rate occupied by the service flow transmitted through the core network and the service flow transmitted through the local route is less than or equal to the total maximum bit rate.

It should be noted that fig. 10 is described by taking the case that AAA and BPCF are fused to the 5GC side as an example, and in the case that AAA and BPCF still remain on the fixed network side, the specific implementation process may refer to the description in fig. 9, where the specific interaction between all BNGs and FMIF is supported inside a-AGF, and all steps of BNG or FMIF are performed by a-AGF instead.

In connection with fig. 4, as shown in fig. 11, in fig. 11 the 5G-RG is accessed to the core network via a wired access network, and the 5G AGF. The shunting strategy of the 5GC control plane is sent to the 5G AGF by the PCF network element through the AMF network element, and the 5G AGF further sends the routing strategy to the 5G-RG, and the 5G-RG serves as a shunting point. The embodiment shown in fig. 11 differs from the embodiments shown in fig. 9 and 10 in that: in fig. 11, 5G AGF does not have a shunting interface, and a shunting interface needs to be added. And when the 5G AGF identifies the service flow, performing QoS control, namely, the TMBR meeting the RG granularity or the TMBR meeting the Session granularity. And 5G-RG is used as a shunting point to process the routing strategy. The source IP address acquisition procedure of the 5G-RG is different from the specific embodiments shown in fig. 9 and 10.

As shown in fig. 11, in the embodiment of the present application, taking a core network element as a PCF network element and an access network gateway as a D-AGF as an example, the method includes:

steps 401 to 409, and steps 301 to 309, for concrete implementation, refer to steps 301 to 308, and are not described herein again.

It should be noted that, the 5G-RG is successfully registered to the 5GC, and an N2 connection is established between the AMF network element and the D-AGF. The PCF network element may consider the capability information of the D-AGF when making the NSFO/5G Routing policy decision, where the manner of obtaining the capability information of the D-AGF is the same as the Adaptive AGF fixed network IP capability in the above embodiment.

Step 410, AMF sends Fixed IP allowed indication and NSFP/5G Routing strategy to D-AGF through N2 Message (Message) according to the relevant information. Wherein the Fixed IP allowed indication indicates that the D-AGF may allocate a source IP address for the 5G-RG.

Step 411, D-AGF sends the NSFO/5G Routing strategy to 5G-RG.

It should be noted that the D-AGF sends an FCP message to the 5G-RG, where the FCP message includes an NSFO/5 grouping policy. In addition, if the D-AGF allocates a source IP address for the 5G-RG, the source IP address of the 5G-RG can be included in the FCP message.

And step 412, the 5G-RG sends a registration success message to the AMF network element.

Step 413, if the D-AGF does not allocate the source IP address to the 5G-RG in step 410 (does not have Local IP capability), and the 5G-RG determines that the source IP address of the 5G-RG is needed according to the NSFO/5G Routing policy, the 5G-RG obtains the source IP address from the SMF network element/UPF network element through the PDU session flow.

Specifically, the 5G-RG can realize the specific process of obtaining the source IP address from the SMF network element/UPF network element through the PDU session flow in steps 413 to 416.

And step 414, the 5G-RG initiates a PDU session, wherein the PDU session comprises the identification of the 5G-RG and the source IP address request of the 5G-RG.

Step 415, the SMF network element obtains the NSFO/5G Routing policy of the 5G-RG from the PCF network element.

Specifically, the SMF network element sends a Policy Request (Policy Request) message to the PCF network element, where the Policy Request message is used to Request the NSFO/5G Routing Policy of the 5G-RG. The PCF network element, after receiving the Policy request message, sends a Policy response (Policy response) message to the SMF network element. The strategy response message carries the NSFO/5G Routing strategy of the 5G-RG.

Step 416, the SMF network element allocates a source IP address (allowed) to the 5G-RG according to the related information, and sends the Local IP, NSFO/5G Routing policy (if updated) of the 5G-RG to the 5G-RG through the AMF network element in an N1 message manner.

For example, the related information may be location information of the terminal, including at least one of a line identification, or geographical location information. In an optional implementation manner, the method provided in the embodiment of the present application further includes: step 417, if the SMF network element does not allocate Local IP of 5G-RG, but allowed, 5G-RG can also obtain the source IP address through DHCP flow.

And step 418, the 5G-RG makes a offloading decision according to the flow description information, the policy indication information, and the like in the NSFO policy or the 5GC Routing policy.

Specifically, step 418 may be implemented in the following manner: the 5G-RG determines that the traffic flow determined by the flow description information needs to go through the 5G network, then step 419 is performed. The 5G-RG determines that the traffic flow determined by the flow description information does not need to pass through the 5G network, then step 420 is performed.

Step 419, 5G-RG encapsulates the service flow with 5G IP address of 5G-RG, or establishes user plane tunnel between 5G-RG, D-AGF and UPF network elements through PDU session establishment flow. The D-AGF can perform IP address replacement as required, and the replacement method is the same as the embodiment shown in fig. 10.

And step 420, the 5G-RG encapsulates the service flow by using the source IP address of the 5G-RG, and the encapsulated service flow directly sends the service flow to DN2 by using the shunting interface provided by the D-AGF.

The above-mentioned scheme of the embodiment of the present application is introduced mainly from the perspective of interaction between network elements. It is to be understood that each network element, such as an access network gateway, a core network element, a terminal, etc., includes a corresponding hardware structure and/or software modules for performing each function in order to implement the above functions. Those of skill in the art would readily appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

In the embodiment of the present application, the method may be used to exemplify the division of the access network gateway, the core network element, and the terminal, for example, each functional unit may be divided corresponding to each function, or two or more functions may be integrated into one processing unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit. It should be noted that the division of the unit in the embodiment of the present application is schematic, and is only a logic function division, and there may be another division manner in actual implementation.

The method of the embodiment of the present application is described above with reference to fig. 5 to 11, and a communication apparatus provided in the embodiment of the present application for performing the method is described below. Those skilled in the art can understand that the method and the apparatus can be combined and referred to each other, and a communication apparatus provided in the embodiments of the present application can perform the steps performed by the access network gateway, the core network element, and the terminal in the traffic flow routing control method.

The following description will be given by taking the division of each function module corresponding to each function as an example:

in the case of an integrated unit, fig. 12 shows a communication apparatus according to the above embodiment, which may include: a processing unit 101, and a communication unit 102.

In one example, the communication device is a core network element or a chip applied in the core network element. In this case, the communication unit 102 is configured to enable the communication device to perform the step 102 performed by the network element of the core network in the above embodiment. A processing unit 101, configured to support the communication device to perform step 101 performed by the core network element in the foregoing embodiment.

In a possible embodiment, the communication unit 102 is further configured to support the communication device to perform steps 107, 109, and 117, which are performed by the core network element in the foregoing embodiment. The processing unit 101 is further configured to support the communication device to perform step 110 performed by the core network element in the foregoing embodiment.

As another example, the communication device is an access network gateway or a chip applied in the access network gateway. In this case, the communication unit 102 is configured to support the communication device to perform step 103, which is performed by the access network gateway in the above embodiment. A processing unit 101, configured to support the communication device to perform step 104 performed by the access network gateway in the foregoing embodiment.

In a possible embodiment, the communication unit 102 is further configured to support the communication device to perform

steps

108, 111, 112, 116, and 118, which are performed by the access network gateway in the foregoing embodiment. The processing unit 101 is further configured to support the communication device to perform step 115 performed by the access network gateway in the foregoing embodiment.

As still another example, the communication device is a terminal or a chip applied in a terminal. In this case, the processing unit 101 is configured to enable the communication device to perform step 106 performed by the terminal in the above-mentioned embodiment. A communication unit 102, configured to enable the communication device to perform step 105 performed by the terminal in the above-described embodiment.

The communication unit 102 is further configured to support the communication device to perform steps 113, 114, and 119 performed by the terminal in the foregoing embodiment.

Fig. 13 shows a schematic diagram of a possible logical structure of the communication apparatus according to the above-described embodiment, in the case of an integrated unit. The communication device includes: a processing module 112 and a communication module 113. The processing module 112 is used for controlling and managing the operation of the communication device, for example, the processing module 112 is used for executing steps of information/data processing in the communication device. The communication module 113 is used to support the steps of information/data transmission or reception in the communication device.

In a possible embodiment, the communication device may further comprise a storage module 111 for storing program codes and data available to the communication device.

Illustratively, the communication device is a core network element, or a chip applied in the core network element. In this case, the communication module 113 is configured to enable the communication device to perform the step 102 performed by the network element of the core network in the foregoing embodiment. A processing module 112, configured to enable the communication device to perform step 101 in the foregoing embodiments.

In a possible embodiment, the communication module 113 is further configured to support the communication device to perform steps 107, 109, and 117, which are performed by the core network element in the foregoing embodiment. The processing module 112 is further configured to support the communication device to perform the step 110 performed by the data analysis network element in the foregoing embodiment.

Illustratively, the communication device is an access network gateway, or a chip applied in the access network gateway. In this case, the communication module 113 is configured to enable the communication device to perform the step 103 performed by the access network gateway in the above embodiment. A processing module 112, configured to enable the communication device to perform step 104 performed by the access network gateway in the foregoing embodiment.

In a possible embodiment, the communication module 113 is further configured to support the communication device to perform

steps

108, 111, 112, 116, and 118, which are performed by the access network gateway in the foregoing embodiment. The processing module 112 is further configured to support the communication device to perform step 115 performed by the access network gateway in the foregoing embodiment.

As still another example, the communication device is a terminal or a chip applied in a terminal. In this case, the processing module 112 is configured to enable the communication apparatus to execute the step 106 executed by the terminal in the above embodiment. A communication module 113, configured to enable the communication device to perform step 105 executed by the terminal in the foregoing embodiment.

The communication module 113 is further configured to support the communication device to perform step 113, step 114, and step 119 performed by the terminal in the foregoing embodiment.

The processing module 112 may be a processor or controller, such as a central processing unit, a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. A processor may also be a combination of computing functions, e.g., a combination of one or more microprocessors, a digital signal processor and a microprocessor, or the like. The communication module 113 may be a transceiver, a transceiving circuit or a communication interface, etc. The storage module 111 may be a memory.

When the processing module 112 is the processor 41 or the processor 45, the communication module 113 is the communication interface 43 or the transceiver, and the storage module 111 is the memory 42, the communication device according to the present application may be the communication device shown in fig. 14. The communication device comprises a processor 41, a communication line 44 and at least one communication interface (which is only illustrated in fig. 14 by way of example as comprising a communication interface 43).

Optionally, the communication device may also include a memory 42.

Processor 41 may be a general-purpose Central Processing Unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more ics for controlling the execution of programs in accordance with the teachings of the present disclosure.

The communication link 44 may include a path for transmitting information between the aforementioned components.

The communication interface 43 may be any device, such as a transceiver, for communicating with other devices or communication networks, such as an ethernet, a Radio Access Network (RAN), a Wireless Local Area Network (WLAN), etc.

The memory 42 may be, but is not limited to, a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a Random Access Memory (RAM) or other type of dynamic storage device that can store information and instructions, an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disk storage, optical disk storage (including compact disc, laser disc, optical disc, digital versatile disc, blu-ray disc, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. The memory may be separate and coupled to the processor via a communication line 44. The memory may also be integral to the processor.

The memory 42 is used for storing computer-executable instructions for executing the present application, and is controlled by the processor 41 to execute. The processor 41 is configured to execute computer-executable instructions stored in the memory 42, so as to implement the traffic flow routing control method provided by the following embodiments of the present application.

Optionally, the computer-executable instructions in the embodiments of the present application may also be referred to as application program codes, which are not specifically limited in the embodiments of the present application.

In particular implementations, processor 41 may include one or more CPUs such as CPU0 and CPU1 in fig. 14, for example, as one embodiment.

In particular implementations, the communication device may include multiple processors, such as processor 41 and processor 45 in fig. 14, for example, as an embodiment. Each of these processors may be a single-core (single-CPU) processor or a multi-core (multi-CPU) processor. A processor herein may refer to one or more devices, circuits, and/or processing cores for processing data (e.g., computer program instructions).

It will be appreciated that the communication interface 43 may be replaced by a transceiver if the communication device is an access network element.

Fig. 15 is a schematic structural diagram of a chip 150 according to an embodiment of the present disclosure. Chip 150 includes one or more (including two) processors 1510 and a communication interface 1530.

Optionally, the chip 150 further includes a memory 1540, which may include both read-only memory and random access memory, and provides operating instructions and data to the processor 1510. A portion of memory 1540 may also include non-volatile random access memory (NVRAM).

In some embodiments, memory 1540 stores elements, execution modules, or data structures, or a subset thereof, or an expanded set thereof.

In the embodiment of the present application, by calling an operation instruction stored in the memory 1540 (the operation instruction may be stored in an operating system), a corresponding operation is performed.

One possible implementation is: the access network gateway, the core network element, and the chip used by the terminal have similar structures, and different devices may use different chips to implement their respective functions.

The processor 1510 controls processing operations of any one of an access network gateway, a core network element, and a terminal, and the processor 1510 may also be referred to as a Central Processing Unit (CPU).

Memory 1540 can include both read-only memory and random-access memory, and provides instructions and data to processor 1510. A portion of memory 1540 may also include non-volatile random access memory (NVRAM). For example, in an application where memory 1540, communications interface 1530 and memory 1540 are coupled together by bus system 1520, where bus system 1520 may include a power bus, control bus, status signal bus, etc. in addition to a data bus. For clarity of illustration, however, the various buses are labeled in fig. 15 as bus system 1520.

The method disclosed in the embodiments of the present application may be applied to the processor 1510 or implemented by the processor 1510. The processor 1510 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by instructions in the form of hardware, integrated logic circuits, or software in the processor 1510. The processor 1510 may be a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, or discrete hardware components. The various methods, steps, and logic blocks disclosed in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 1540, and the processor 1510 reads the information in the memory 1540, and performs the steps of the above method in combination with the hardware thereof.

In a possible implementation, communication interface 1530 is configured to perform the steps of receiving and sending of any one of an access network gateway, a core network element, and a terminal in the embodiments shown in fig. 5 to 11. The processor 1510 is configured to perform the steps of the processing of any one of the access network gateway, the core network element, and the terminal in the embodiments shown in fig. 3-10.

The above communication unit may be an interface circuit or a communication interface of the apparatus for receiving signals from other apparatuses. For example, when the device is implemented in the form of a chip, the communication unit is an interface circuit or a communication interface for the chip to receive signals from or transmit signals to other chips or devices.

In the above embodiments, the instructions stored by the memory for execution by the processor may be implemented in the form of a computer program product. The computer program product may be written in the memory in advance or may be downloaded in the form of software and installed in the memory.

The computer program product includes one or more computer instructions. The procedures or functions according to the embodiments of the present application are all or partially generated when the computer program instructions are loaded and executed on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, e.g., the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. A computer-readable storage medium may be any available medium that a computer can store or a data storage device including one or more available media integrated servers, data centers, and the like. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.

In one aspect, a computer-readable storage medium is provided, in which instructions are stored, and when executed, the instructions cause a core network element or a chip applied in the core network element to perform steps 101, 102, 107, 109, 110, and 117 in the embodiments.

In another aspect, a computer-readable storage medium is provided, in which instructions are stored, and when executed, the instructions cause an access network gateway or a chip applied in the access network gateway to perform

steps

103, 104, 108, 111, 112, 115, 116, and 118 in the embodiments.

In still another aspect, a computer-readable storage medium is provided, in which instructions are stored, and when executed, the instructions cause a terminal or a chip applied in the terminal to perform steps 105, 106, 113, 114, and 119 in the embodiments.

The aforementioned readable storage medium may include: u disk, removable hard disk, read only memory, random access memory, magnetic or optical disk, etc. for storing program codes.

In one aspect, a computer program product is provided, which comprises instructions stored therein, which when executed, cause a core network element or a chip applied in the core network element to perform steps 101, 102, 107, 109, 110, 117 in the embodiments.

In another aspect, a computer program product is provided, which comprises instructions stored therein, which when executed, cause an access network gateway or a chip applied in the access network gateway to perform

steps

103, 104, 108, 111, 112, 115, 116, 118 in the embodiments.

In still another aspect, a computer program product comprising instructions stored therein, which when executed, cause a terminal or a chip applied in the terminal to perform steps 105, 106, 113, 114, 119 in an embodiment is provided.

In one aspect, a chip is provided, where the chip is applied to a network element of a core network, and the chip includes at least one processor and a communication interface, where the communication interface is coupled to the at least one processor, and the processor is configured to execute instructions to perform

steps

103, 104, 108, 111, 112, 115, 116, and 118 in the embodiments.

In another aspect, a chip is provided, where the chip is applied in an access network gateway, and the chip includes at least one processor and a communication interface, where the communication interface is coupled to the at least one processor, and the processor is configured to execute instructions to perform

steps

103, 104, 108, 111, 112, 115, 116, and 118 in the embodiments.

In one aspect, a chip is provided, where the chip is applied in a terminal, and the chip includes at least one processor and a communication interface, where the communication interface is coupled to the at least one processor, and the processor is configured to execute instructions to perform steps 105, 106, 113, 114, and 119 in the embodiments.

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented using a software program, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. The procedures or functions according to the embodiments of the present application are all or partially generated when the computer program instructions are loaded and executed on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored on a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wire (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL), for short) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or can comprise one or more data storage devices, such as a server, a data center, etc., that can be integrated with the medium. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.

While the present application has been described in connection with various embodiments, other variations to the disclosed embodiments can be understood and effected by those skilled in the art in practicing the claimed application, from a review of the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other elements or steps, and the word "a" or "an" does not exclude a plurality. A single processor or other unit may fulfill the functions of several items recited in the claims. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.

Although the present application has been described in conjunction with specific features and embodiments thereof, it will be evident that various modifications and combinations can be made thereto without departing from the spirit and scope of the application. Accordingly, the specification and figures are merely exemplary of the present application as defined in the appended claims and are intended to cover any and all modifications, variations, combinations, or equivalents within the scope of the present application. It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include such modifications and variations.

Claims

1. A traffic flow routing control method, comprising:

a core network element acquires a routing strategy of a terminal according to any one or more of identification information of the terminal, an access type of the terminal and position information of the terminal; wherein, the routing strategy is a core network routing strategy and/or a local routing strategy;

and the core network element sends the routing strategy to an access network gateway or the terminal.

2. The method of claim 1, further comprising:

the core network element receives a request message, the request message including any one or more of the following information: identification information of the terminal, an access type of the terminal, or location information of the terminal.

3. The method according to claim 1 or 2, wherein the core network routing policy comprises: a core network routing indication and/or flow description information, wherein the core network routing indication is used for indicating a service flow determined by transmitting the flow description information through the core network;

the local routing policy includes: local routing indication and/or flow description information, wherein the local routing indication is used for indicating a service flow determined by transmitting the flow description information through the local routing.

4. The method of claim 3, wherein the flow description information includes any one or more of the following information: application identification, flow quintuple identification, virtual local area network VLAN label, session type, access line identification and access point identification.

5. The method according to any one of claims 1-4, further comprising:

the core network element acquires the capability information of the access network gateway, wherein the capability information is used for indicating whether the access network gateway has the capability of allocating a first address to the terminal or the service local routing capability; wherein, the first address is an address allocated to the terminal by the access network gateway or the core network element or the user plane function network element;

the acquiring, by the core network element, the routing policy of the terminal according to any one or more of the identifier information of the terminal, the access type of the terminal, and the location information of the terminal specifically includes:

and the core network element acquires the routing strategy according to any one or more of the identification information of the terminal, the access type of the terminal and the position information of the terminal and the capability information.

6. The method of claim 5, wherein the obtaining, by the core network element, the routing policy of the terminal according to any one or more of the identification information of the terminal, the access type of the terminal, the location information of the terminal, and the capability information comprises:

the access network gateway has the capability of allocating a first address to the terminal or the service local routing capability, and the core network element determines that the routing policy is the local routing policy; and/or the first and/or second light sources,

the access network gateway does not have the capability of allocating the first address to the terminal or the capability of local service routing, and the core network element determines that the routing policy is the core network routing policy.

7. The method according to claim 5 or 6, wherein the obtaining, by the core network element, the capability information of the access network gateway includes:

and the core network element receives the capability information from the access network gateway.

8. A traffic flow routing control method, comprising:

an access network gateway receives a routing strategy of a terminal from a core network element; wherein, the routing strategy is a core network routing strategy and/or a local routing strategy;

and the access network gateway processes the service flow of the terminal according to the routing strategy.

9. The method of claim 8, wherein the traffic flow is transmitted through the core network routing policy, and wherein the processing of the traffic flow of the terminal by the access network gateway according to the routing policy comprises:

the access network gateway processes the service flow by adopting the second address of the terminal and sends the processed service flow to a fixed mobile network interaction function; the second address is an address allocated to the terminal by the core network.

10. The method of claim 8, wherein the traffic flow is transmitted through the core network routing policy, and wherein the processing of the traffic flow of the terminal by the access network gateway according to the routing policy comprises:

the access network gateway processes the service flow by adopting the second address of the terminal and sends the processed service flow to a user plane functional network element, or:

and the access network gateway replaces the address of the service flow from a first address to a second address and sends the processed service flow to the user plane functional network element, wherein the first address is an address allocated to the terminal by the access network gateway or the core network element or the user plane functional network element.

11. The method according to any of claims 8-10, wherein the processing, by the access network gateway, the traffic flow of the terminal according to the routing policy comprises:

and the access network gateway transmits the service flow to a data network by adopting the first address of the terminal.

12. The method according to any one of claims 8-11, further comprising:

the access network gateway receives the service quality parameters from the core network element;

the access network gateway processes the service flow of the terminal according to the routing strategy, and the process comprises the following steps:

and the access network gateway processes the service flow of the terminal according to the service quality parameters and the routing strategy, wherein the service quality parameters comprise service quality parameters of terminal granularity, and the service flow comprises the service flow transmitted by adopting the core network routing strategy and/or the service flow transmitted by adopting the local routing strategy.

13. The method according to any one of claims 8-12, further comprising:

the access network gateway receives a second request message from the terminal or first indication information from the core network element, the second request message is used for requesting to allocate a first address to the terminal, and the first indication information is used for indicating that the access network gateway is allowed to allocate the first address to the terminal;

and the access network gateway allocates the first address to the terminal according to the second request message or the first indication information.

14. The method according to any one of claims 8-13, further comprising:

and the access network gateway acquires a second address allocated to the terminal by the core network element.

15. The method according to any one of claims 8-14, further comprising:

the access network gateway sends a second address to the terminal according to a core network routing strategy; and/or the first and/or second light sources,

and the access network gateway sends the first address to the terminal according to the first indication information or the second request message.

16. A communications apparatus, comprising:

the processing unit is used for acquiring a routing strategy of the terminal according to any one or more of identification information of the terminal, an access type of the terminal and position information of the terminal; wherein, the routing strategy is a core network routing strategy and/or a local routing strategy;

and the communication unit is used for sending the routing strategy to an access network gateway or the terminal.

17. The apparatus of claim 16, wherein the communication unit is further configured to receive a request message by a core network element, and wherein the request message includes any one or more of the following information: identification information of the terminal, an access type of the terminal, or location information of the terminal.

18. The apparatus of claim 16 or 17, wherein the core network routing policy comprises: a core network routing indication and/or flow description information, wherein the core network routing indication is used for indicating a service flow determined by transmitting the flow description information through the core network;

19. The apparatus of claim 18, wherein the flow description information comprises any one or more of the following information: application identification, flow quintuple identification, virtual local area network VLAN label, session type, access line identification and access point identification.

20. The apparatus according to any of claims 16-19, wherein the communication unit is further configured to obtain capability information of the access network gateway, where the capability information is used to indicate whether the access network gateway has a capability of assigning a first address to the terminal or a capability of local routing of traffic; wherein, the first address is an address allocated to the terminal by the access network gateway or the core network element or the user plane function network element;

the processing unit is specifically configured to obtain the routing policy according to any one or more of the identifier information of the terminal, the access type of the terminal, and the location information of the terminal, and the capability information.

21. The apparatus according to claim 20, wherein the access network gateway has a capability of assigning a first address to the terminal or a service local routing capability, and the processing unit is specifically configured to determine that the routing policy is the local routing policy; and/or the first and/or second light sources,

the access network gateway does not have the capability of allocating the first address to the terminal or the capability of local service routing, and the processing unit is specifically configured to determine that the routing policy is the core network routing policy.

22. The apparatus according to claim 20 or 21, wherein the processing unit is specifically configured to receive the capability information from the access network gateway through the communication unit.

23. A communications apparatus, comprising:

a communication unit, configured to receive a routing policy of a terminal from a core network element; wherein, the routing strategy is a core network routing strategy and/or a local routing strategy;

and the processing unit is used for processing the service flow of the terminal according to the routing strategy.

24. The apparatus according to claim 23, wherein the traffic flow is transmitted via the core network routing policy, and the processing unit is specifically configured to process the traffic flow using the second address of the terminal, and send the processed traffic flow to a fixed-mobile network interworking function; the second address is an address allocated to the terminal by the core network.

25. The apparatus according to claim 24, wherein the service flow is transmitted through the core network routing policy, and the processing unit is specifically configured to process the service flow using the second address of the terminal, and send the processed service flow to a user plane function network element, or:

the processing unit is specifically configured to replace an address of the service flow from a first address to a second address, and send the processed service flow to the user plane functional network element.

26. The arrangement according to any of the claims 23-25, wherein said traffic flow is transported via a local routing policy, and said processing unit is specifically configured to transport said traffic flow to a data network using said first address of said terminal.

27. The apparatus according to any of claims 23-26, wherein said communication unit is further configured to receive a quality of service parameter from said core network element;

the processing unit is further configured to process a service flow of the terminal according to the qos parameter and the routing policy, where the qos parameter includes a qos parameter of a terminal granularity, and the service flow includes a service flow transmitted by using the core network routing policy and/or a service flow transmitted by using the local routing policy.

28. The apparatus according to any of claims 23-27, wherein the communication unit is further configured to receive a second request message from the terminal or first indication information from the core network element, the second request message is used to request that the terminal is assigned the first address, and the first indication information is used to indicate that the communication apparatus is allowed to assign the first address to the terminal;

the processing unit is specifically configured to allocate the first address to the terminal according to the second request message or the first indication information.

29. The apparatus according to any of claims 23-28, wherein the communication unit is further configured to obtain a second address assigned by the core network element for the terminal.

30. The apparatus according to any of claims 23-29, wherein the communication unit is further configured to send a second address to the terminal according to the core network routing policy; and/or the first and/or second light sources,

the communication unit is further configured to send the first address to the terminal according to the first indication information or the second request message.

31. A chip, characterized in that the chip comprises at least one processor and a communication interface, the communication interface being coupled with the at least one processor, the at least one processor being configured to execute a computer program or instructions to implement a traffic flow routing control method according to any one of claims 1-7 or to implement a traffic flow routing control method according to any one of claims 8-15, the communication interface being configured to communicate with other modules than the chip.

32. A communications apparatus, comprising: a processor and a communication interface;

wherein the communication interface is configured to perform the operation of performing messaging in a core network element in the traffic flow routing control method according to any one of claims 1 to 7; the processor executes instructions to perform operations of processing or controlling in the core network element in the traffic flow routing control method according to any one of claims 1 to 7; alternatively, the first and second electrodes may be,

the communication interface is configured to perform the operation of messaging in an access network gateway in the traffic flow routing control method according to any one of claims 8 to 15; the processor executes instructions to perform operations of processing or controlling in the access network gateway in the traffic flow routing control method according to any of claims 8-15.

33. A computer-readable storage medium having stored therein instructions which, when executed, implement the traffic flow routing control method of any of claims 1-7 above; or, implementing the traffic flow routing control method of any of the above claims 8-15.

34. A communication system, comprising: a communication device according to any of claims 16-22, a communication device according to any of claims 23-30, and a terminal for communicating with a communication device according to any of claims 23-30.