WO2020199733A1 - 策略控制方法、设备及系统 - Google Patents

策略控制方法、设备及系统 Download PDF

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Publication number
WO2020199733A1
WO2020199733A1 PCT/CN2020/073064 CN2020073064W WO2020199733A1 WO 2020199733 A1 WO2020199733 A1 WO 2020199733A1 CN 2020073064 W CN2020073064 W CN 2020073064W WO 2020199733 A1 WO2020199733 A1 WO 2020199733A1
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Prior art keywords
session
network element
policy
policy rule
control information
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PCT/CN2020/073064
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English (en)
French (fr)
Inventor
吴义壮
李永翠
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华为技术有限公司
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Publication of WO2020199733A1 publication Critical patent/WO2020199733A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/14—Session management

Definitions

  • This application relates to the field of communication technology, and in particular to a strategy control method, device and system.
  • the 3GPP standards group formulated the next generation system network architecture at the end of 2016. It is the fifth generation (5rd generation, 5G) network architecture.
  • the 5G network architecture defines ultra-reliable and low latency communication (URLLC) scenarios, which mainly include services that require low latency and high reliability connections such as unmanned driving and industrial automation.
  • URLLC ultra-reliable and low latency communication
  • the policy control function (PCF) network element only considers the current PDU session when determining the policy for the PDU session. Information, that is, the policy control of each PDU session is executed independently.
  • the PCF network element needs to determine a policy to enable a single PDU session to support high reliability of the service, and the requirements for network resources are more stringent.
  • the independent control of each PDU session may lead to unsatisfied service requirements and result in service transmission failure.
  • the embodiments of the present application provide a policy control method, device, and system, which can reduce the demand for network resources in a scenario where one service is transmitted through two redundant sessions to ensure high reliability of the service.
  • a policy control method includes: a policy control network element learns that a first session is a redundant session; the policy control network element determines a first policy rule of the first session, wherein the first policy The rule includes first quality of service QoS control information, the first QoS control information is the QoS control information required by the first session to transmit the service, the service is transmitted through at least two sessions, and the at least two sessions include the first session.
  • One session, the at least two sessions are redundant sessions associated with the terminal device; the policy control network element sends the first policy rule to the first session management network element serving the first session.
  • the service is transmitted through at least two sessions, and the at least two sessions include the first The redundant session associated with the end device of the session. That is, the policy control network element considers the factor that the first session is a redundant session when determining the first policy rule of the first session. Therefore, in a scenario where a service is transmitted through two redundant sessions to ensure high reliability of the service, not only the demand for network resources is reduced, but the independent control of each session can also avoid the unsatisfied service requirements caused by the independent control of each session. The problem of business transmission failure.
  • the first QoS control information is the QoS control information required for the first session transmission service, and the service is transmitted through at least two sessions. It can also be described as the first QoS control information as When the service is transmitted through at least two sessions, the QoS control information required by the first session to transmit the service is described here in a unified manner, and will not be described in detail below.
  • the policy control network element learning that the first session is a redundant session includes: the policy control network element receives information about the first session from the first session management network element, and the information about the first session includes First indication information, where the first indication information is used to indicate that the first session is a redundant session. That is, when the first redundant session is established, the policy control network element may learn that the first session is a redundant session according to the first indication information included in the information of the first session.
  • the at least two sessions further include a second session
  • the method further includes: the policy control network element generates a second policy rule for the second session, and the second policy rule includes second QoS control information ,
  • the second QoS control information is QoS control information required for the second session to transmit the service. That is to say, when the first redundant session is established, the policy control network element can generate the second policy rule of the second session while generating the first policy rule of the first session.
  • the second QoS control information is the QoS control information required for the second session transmission service, and the service is transmitted through at least two sessions. It can also be described as the second QoS control information as When the service is transmitted through at least two sessions, the QoS control information required for the second session to transmit the service is described here in a unified manner, and will not be repeated in the following.
  • first policy rule and the second policy rule in the embodiment of the present application are coordinated policy rules, which are explained here in a unified manner, and will not be repeated here.
  • the first indication information includes first redundant sequence number RSN information.
  • the first RSN information is also used to indicate that the access device of the first session is the primary access device or the secondary access device; the policy control network element generates the first policy of the first session
  • the rule includes: the policy control network element generates the first policy rule of the first session according to the first indication information. For example, if the policy control network element determines that the first session uses the primary access device for user plane transmission, the first policy rule of the first session is the policy rule when the primary access device is used for transmission; or, if the policy control network element determines The first session uses the secondary access device for user plane transmission, and the first policy rule of the first session is the policy rule when the secondary access device is used for transmission.
  • the at least two sessions further include a second session, the second session being the first redundant session of the terminal device, and the first session being the second redundant session of the terminal device
  • the policy control network element learning that the first session is a redundant session includes: the policy control network element receives information associated with the second session from the first session management network element; the policy control network element associates the second session according to the information Information, it is learned that the first session is a redundant session. That is, when the second redundant session is established, the policy control network element can learn that the first session is a redundant session according to the information associated with the second session.
  • the policy control network element determining the first policy rule of the first session includes: the policy control network element determines the context of the second session according to the information associated with the second session; the policy control network The element obtains the first policy rule from the context of the second session; or, the policy control network element obtains the second policy rule of the second session from the context of the second session, and the policy control network element obtains the second policy rule according to the second session.
  • the second policy rule generates the first policy rule, where the second policy rule includes second QoS control information, and the second QoS control information is QoS control information required by the second session to transmit the service.
  • the information associated with the second session includes the first RSN information.
  • the at least two sessions further include a second session
  • the method further includes: the policy control network element deletes the first policy rule and updates the second policy rule of the second session, wherein, The second policy rule includes second QoS control information, and the second QoS control information is the QoS control information required for the second session to transmit the service; the updated second policy rule of the second session includes third QoS control Information, the third QoS control information is QoS control information required when only using the second session to transmit the service; the policy control network element sends the updated second session management network element to the second session management network element serving the second session Policy rules. Based on this solution, the policy control network element can determine appropriate policy rules for the terminal device session in real time.
  • the at least two sessions further include a second session
  • the method further includes: the policy control network element deletes the second policy rule of the second session, and updates the first policy rule.
  • the second policy rule includes second QoS control information, and the second QoS control information is the QoS control information required by the second session to transmit the service;
  • the updated first policy rule includes fourth QoS control information, and the fourth QoS
  • the control information is QoS control information required when only using the first session to transmit the service; the policy control network element sends the updated first policy rule to the first session management network element. Based on this solution, the policy control network element can determine appropriate policy rules for the terminal device session in real time.
  • the at least two sessions further include a second session
  • the method further includes: the policy control network element determines to delete the first policy rule or the second policy rule of the second session, and the second The policy rule includes second QoS control information, and the second QoS control information is the QoS control information required for the second session to transmit the service; the policy control network element deletes the first policy rule and the second policy rule; policy control The network element sends second instruction information to the first session management network element, where the second instruction information is used to instruct to delete the first policy rule; and, the policy control network element sends second instruction information to the second session management network serving the second session.
  • the meta sends third instruction information, where the third instruction information is used to instruct to delete the second policy rule.
  • the policy rules established for redundant sessions are coordinated policy rules. Therefore, if the policy control network element determines to delete one of the redundant sessions, the policy control network element can combine the two redundant sessions. The policy rules of the session are deleted, thereby avoiding the problem that the undeleted policy rules cannot meet the business requirements of the session and cause the service transmission failure.
  • a policy control method includes: a policy control network element receives a first address of a terminal device from an application function network element; the policy control network element determines the first address of the first session corresponding to the first address A policy rule and a second policy rule of the second session, the first policy rule includes first QoS control information, the second policy rule includes second QoS control information, and the first QoS control information is the first session transmission service
  • the required QoS control information, the second QoS control information is the QoS control information required for the second session to transmit the service, the first session and the second session are redundant sessions associated with the terminal device; the policy control network element
  • the first session management network element serving the first session sends the first policy rule; and the policy control network element sends the second policy rule to the second session management network element serving the second session.
  • the policy control network element since the policy control network element considers the factor that the first session and the second session are redundant sessions when determining the first policy rule of the first session and the second policy rule of the second session.
  • the policy control network element since the policy control network element considers the factor that the first session and the second session are redundant sessions when determining the first policy rule of the first session and the second policy rule of the second session.
  • it not only reduces the demand for network resources, but also avoids the problem that the independent control of each session may cause service requirements to be unsatisfied and cause service transmission failure. .
  • a policy control method includes: a policy control network element receives a first address of a terminal device from an application function network element; and the policy control network element determines a first session and a second address corresponding to the first address.
  • the policy rule of the second session includes QoS control information, the QoS control information is the QoS control information required when the first session and the second session are used to transmit services, and the first session and the second session are associated with the terminal device Redundant session; the policy control network element sends the policy rule to the first session management network element corresponding to the first session and the second session management network element corresponding to the second session.
  • the policy control network element since the policy control network element considers the factor that the first session and the second session are redundant sessions when determining the policy rules of the first session and the second session, therefore, when transmitting a service through two redundant sessions To ensure the high reliability of the service, it not only reduces the demand for network resources, but also avoids the problem of service transmission failure caused by the unsatisfied service requirements caused by the independent control of each session.
  • the policy control network element receiving the first address of the terminal device from the application function network element includes: the policy control network element receiving the first address from the application function network element A message, the first message including the first address and the second address of the terminal device corresponding to the second session.
  • the first address and the second address may be carried by one message.
  • the policy control network element receiving the first address of the terminal device from the application function network element includes: the policy control network element receiving the first address from the application function network element Two messages, the second message includes the first address. In other words, the first address can be sent in a single message.
  • the method further includes: the policy control network element learning that the first session corresponding to the first address is a redundant session.
  • the method further includes: the policy control network element receives a third message from the application function network element, the third message including the second session corresponding to the The second address of the terminal device.
  • the method further includes: the policy control network element learning that the first session corresponding to the first address and the second session corresponding to the second address are The redundant session associated with this terminal device. That is, when the first address and the second address are carried by different messages, the policy control network element can determine the first session corresponding to the first address and the second session corresponding to the second address according to the first address and the second address. The redundant session associated with this terminal device.
  • a policy control method includes: an application function network element obtains at least one of a first address of a terminal device or a second address of the terminal device; wherein the first address corresponding to the first address The second session corresponding to the session and the second address is a redundant session associated with the terminal device; the application function network element sends at least one of the first address or the second address to the policy control network element.
  • At least one of the first address or the second address is used to determine the first policy rule of the first session and the second policy rule of the second session, and the first policy rule includes First QoS control information, the second policy rule includes second QoS control information, the first QoS control information is QoS control information required by the first session transmission service, and the second QoS control information is the second session transmission QoS control information required by the service.
  • the policy control network element since the policy control network element considers the factor that the first session and the second session are redundant sessions when determining the policy rules of the first session and the second session, therefore, when transmitting a service through two redundant sessions To ensure the high reliability of the service, it not only reduces the demand for network resources, but also avoids the problem of service transmission failure caused by the unsatisfied service requirements caused by the independent control of each session.
  • At least one of the first address or the second address includes the first address and the second address; the application function network element sends the first address or the second address to the policy control network element At least one of the addresses includes: the application function network element sends a first message to the policy control network element, the first message including the first address and the second address.
  • the first address and the second address may be carried by one message.
  • At least one of the first address or the second address includes the first address and the second address; the application function network element sends the first address or the second address to the policy control network element At least one of the addresses includes: the application function network element sends a second message and a third message to the policy control network element, the second message includes the first address, and the third message includes the second address. That is, in the embodiment of the present application, the first address and the second address may be carried by different messages.
  • a policy control method includes: the session management network element determines that the session being established is the second redundant session; the session management network element will serve the policy control network for the first redundant session The element is determined as the policy control network element serving the second redundant session. Based on this solution, in the process of establishing a redundant session, the policy control network element serving the redundant session can be the same policy control network element.
  • a communication device for implementing the above-mentioned various methods.
  • the communication device may be the policy control network element in the first aspect or the second aspect or the third aspect, or a device containing the policy control network element; or, the communication device may be the application function network in the fourth aspect. Or a device including the above-mentioned application function network element; or, the communication device may be the above-mentioned session management network element in the fifth aspect, or a device including the above-mentioned session management network element.
  • the communication device includes a module, unit, or means corresponding to the foregoing method, and the module, unit, or means can be implemented by hardware, software, or hardware execution of corresponding software.
  • the hardware or software includes one or more modules or units corresponding to the above-mentioned functions.
  • a communication device including: a processor and a memory; the memory is used to store computer instructions, and when the processor executes the instructions, the communication device can execute the above-mentioned first to fifth aspects.
  • the communication device may be the policy control network element in the first aspect or the second aspect or the third aspect, or a device containing the policy control network element; or, the communication device may be the application function network in the fourth aspect. Or a device including the above-mentioned application function network element; or, the communication device may be the above-mentioned session management network element in the fifth aspect, or a device including the above-mentioned session management network element.
  • a communication device including: a processor; the processor is configured to couple with a memory, and after reading an instruction in the memory, execute any of the above-mentioned first to fifth aspects according to the instruction.
  • the method described in one aspect may be the policy control network element in the first aspect or the second aspect or the third aspect, or a device containing the policy control network element; or, the communication device may be the application function network in the fourth aspect. Or a device including the above-mentioned application function network element; or, the communication device may be the above-mentioned session management network element in the fifth aspect, or a device including the above-mentioned session management network element.
  • a computer-readable storage medium stores instructions that, when run on a computer, enable the computer to execute any one of the first to fifth aspects mentioned above. The method described.
  • a computer program product containing instructions which when running on a computer, enables the computer to execute the method described in any one of the above-mentioned first to fifth aspects.
  • a communication device for example, the communication device may be a chip or a chip system
  • the communication device includes a processor, configured to implement the above-mentioned first aspect to the fifth aspect.
  • the communication device further includes a memory for storing necessary program instructions and data.
  • the communication device is a chip system, it may be composed of chips, or may include chips and other discrete devices.
  • a communication system in a twelfth aspect, includes a policy control network element and a first session management network element serving a first session.
  • the policy control network element is used to determine the first policy rule of the first session after learning that the first session is a redundant session, where the first policy rule includes first quality of service QoS control information, and the first QoS control
  • the information is QoS control information required by the first session to transmit the service, the service is transmitted through at least two sessions, the at least two sessions include the first session, and the at least two sessions are redundancy associated with the terminal device Session;
  • the policy control network element is also used to send the first policy rule to the first session management network element serving the first session.
  • the first session management network element is configured to receive the first policy rule from the policy control network element.
  • a communication system in a thirteenth aspect, includes a policy control network element and an application function network element; an application function network element for obtaining a first address of a terminal device; an application function network element for The policy control network element sends the first address.
  • the policy control network element is used to receive the first address from the application function network element; the policy control network element is also used to determine the first policy rule of the first session corresponding to the first address and the second address corresponding to the second address.
  • the second policy rule of the session includes first quality of service QoS control information
  • the second policy rule includes second QoS control information
  • the first QoS control information is the QoS required for the transmission service of the first session Control information
  • the second QoS control information is the QoS control information required by the second session to transmit the service
  • the first session and the second session are redundant sessions associated with the terminal device
  • the policy control network element is also used to The first session management network element serving the first session sends the first policy rule
  • the policy control network element is further configured to send the second policy rule to the second session management network element serving the second session.
  • FIG. 1 is a first structural diagram of a communication system provided by an embodiment of this application.
  • FIG. 2 is a second structural diagram of a communication system provided by an embodiment of this application.
  • FIG. 3 is a schematic diagram 1 of the application of the communication system provided by an embodiment of the application in a 5G network;
  • FIG. 4 is a second schematic diagram of the application of the communication system provided by the embodiment of the application in the 5G network;
  • FIG. 5 is a schematic structural diagram of a communication device provided by an embodiment of this application.
  • FIG. 6 is a schematic diagram 1 of the flow of a policy control method provided by an embodiment of the application.
  • FIG. 7 is a second schematic diagram of the flow of the policy control method provided by an embodiment of the application.
  • FIG. 8 is a third schematic flowchart of a policy control method provided by an embodiment of this application.
  • FIG. 9 is a fourth schematic flowchart of a policy control method provided by an embodiment of this application.
  • FIG. 10 is a fifth schematic flowchart of a policy control method provided by an embodiment of this application.
  • FIG. 11 is a sixth flowchart of a strategy control method provided by an embodiment of this application.
  • FIG. 12 is a seventh flowchart of the policy control method provided by an embodiment of this application.
  • FIG. 13 is an eighth flowchart of a strategy control method provided by an embodiment of this application.
  • FIG. 14 is a schematic structural diagram of a policy control network element provided by an embodiment of the application.
  • FIG. 15 is a schematic structural diagram of an application function network element provided by an embodiment of this application.
  • At least one item (a) refers to any combination of these items, including any combination of a single item (a) or plural items (a).
  • at least one item (a) of a, b, or c can mean: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple .
  • words such as “first” and “second” are used to distinguish the same items or similar items with substantially the same function and effect. Those skilled in the art can understand that words such as “first” and “second” do not limit the quantity and order of execution, and words such as “first” and “second” do not limit the difference.
  • the communication system 10 includes a policy control network element 101 and a first session management network element 102.
  • the policy control network element 101 and the first session management network element 102 may communicate directly, or may communicate through forwarding of other devices, which is not specifically limited in the embodiment of the present application.
  • the policy control network element 101 is configured to determine a first policy rule for the first session after learning that the first session is a redundant session, where the first policy rule includes a first quality of service (QoS) control Information, the first QoS control information is the QoS control information required by the first session to transmit the service, the service is transmitted through at least two sessions, the at least two sessions include the first session, and the at least two sessions are The redundant session associated with the terminal device.
  • the policy control network element 101 is further configured to send the first policy rule to the first session management network element 102 serving the first session.
  • the first session management network element 102 is configured to receive the first policy rule from the policy control network element 101.
  • the first session in the embodiment of the present application may be the first established session among the redundant sessions, or may be the second established session among the redundant sessions, which is not specifically limited in the embodiment of the present application .
  • the first session and the second session are used to transmit services, that is, a copy of the same data is copied and transmitted in the two sessions respectively. That is to say, two copies of each data packet are transmitted, which are explained here in a unified manner, and will not be repeated here.
  • the service is transmitted through at least two sessions, and the at least two sessions include the first session.
  • a redundant session associated with the terminal device of a session That is, the policy control network element considers the factor that the first session is a redundant session when determining the first policy rule of the first session. Therefore, in a scenario where a service is transmitted through two redundant sessions to ensure high reliability of the service, not only the demand for network resources is reduced, but the independent control of each session can also avoid the unsatisfied service requirements caused by the independent control of each session. The problem of business transmission failure.
  • another communication system 20 provided in this embodiment of the application includes a policy control network element 201, an application function network element 202, a first session management network element 203, and a first session management network element 203.
  • the policy control network element 201 and the application function network element 202 may communicate directly, or communicate through the forwarding of other devices, which is not specifically limited in the embodiment of the present application.
  • the policy control network element 201 and the first session management network element 203 or the second session management network element 204 may communicate directly, or may communicate through the forwarding of other devices, which is not specifically limited in the embodiment of the present application.
  • the application function network element 202 is used to send the first address of the terminal device to the policy control network element 201.
  • the policy control network element 201 is used to receive the first address of the terminal device from the application function network element 202; the policy control network element 201 is also used to determine the first policy rule and the second policy rule of the first session corresponding to the first address
  • the second policy rule of the session the first policy rule includes the first QoS control information
  • the second policy rule includes the second QoS control information
  • the first QoS control information is the QoS control information required for the transmission service of the first session
  • the control information is QoS control information required for the transmission service of the second session, and the first session and the second session are redundant sessions associated with the terminal device.
  • the policy control network element 201 is also used to send the first policy rule to the first session management network element 203 serving the first session; and the policy control network element 201 is also used to send the first policy rule to the second session management network element 203 serving the second session.
  • Element 204 sends the second policy rule.
  • the first session management network element 203 is configured to receive the first policy rule from the policy control network element 201.
  • the second session management network element 204 is configured to receive the second policy rule from the policy control network element 201.
  • the first session in the embodiment of the present application may be the first established session among the redundant sessions, or may be the second established session among the redundant sessions, which is not specifically limited in the embodiment of the present application .
  • first session management network element 203 and the second session management network element 204 in the embodiment of the present application may be the same session management network element, or may be different session management network elements. There is no specific limitation.
  • the policy control network element since the policy control network element considers the factor that the first and second sessions are redundant sessions when determining the first policy rule of the first session and the second policy rule of the second session, the In the scenario where two redundant sessions transmit one service to ensure high reliability of the service, it not only reduces the demand for network resources, but also avoids the failure of service transmission caused by the unsatisfied service requirements caused by the independent control of each session. problem.
  • the communication system 10 shown in FIG. 1 or the communication system 20 shown in FIG. 2 may be applied to the 5G network currently under discussion or other future networks, etc., which is not specifically limited in the embodiment of the present application.
  • the first session management network element and the second session management network element are the same session management
  • the network element or entity corresponding to the first session management network element or the second session management network element may be the session management function (SMF) in the 5G network.
  • SMF session management function
  • the network element or entity corresponding to the above-mentioned policy control network element may be a PCF network element in the 5G network
  • the network element or entity corresponding to the above-mentioned application function network element may be an application function in the 5G network (application function, AF) network element.
  • the 5G network may also include primary access equipment, user plan function (UPF) network element 1, secondary access equipment, UPF network element 2, access and mobility management Function (access and mobility management function, AMF) network elements, unified data management (UDM) network elements, and unified database (unified data repository, UDR) network elements, etc., are not specifically limited here.
  • UPF user plan function
  • AMF access and mobility management Function
  • UDM unified data management
  • UDR unified database
  • the terminal equipment is respectively connected to the main access device and the auxiliary access device.
  • the primary access device communicates with the UPF network element 1 through a next generation network (N) 3 interface (N3 for short), and the auxiliary access device communicates with the UPF network element 2 through N3.
  • the UPF network element 1 and the UPF network element 2 respectively communicate with a data network (DN) through an N6 interface (N6 for short).
  • the primary access device communicates with the secondary access device through the Xn interface (Xn for short), the primary access device communicates with the AMF network element through the N2 interface (referred to as N2), and the UPF network element 1 and UPF network element 2 respectively through the N4 interface (N4 for short) communicates with SMF network elements.
  • Control plane network elements such as AMF network elements, SMF network elements, PCF network elements, UDM network elements, UDR network elements, and AF network elements interact with each other using service-oriented interfaces.
  • the servicing interface provided by AMF network elements to the outside can be Namf; the servicing interface provided by SMF network elements to the outside can be Nsmf; the servicing interface provided by PCF network elements can be Npcf; the servicing interface provided by UDM network elements to the outside It can be Nudm; the servicing interface provided by UDR network elements to the outside can be Nudr; the servicing interface provided by AF network elements can be Naf.
  • 5G system architecture 5G system architecture diagram in the 23501 standard, which will not be repeated here.
  • FIG. 3 uses terminal equipment to establish two sessions to achieve end-to-end high-reliability transmission between the terminal equipment and the DN. These two sessions are controlled by an SMF network element.
  • the user plane connection corresponding to one session (hereinafter referred to as session 1) is: terminal device-primary access device-UPF network element 1-DN; the user corresponding to the other session (hereinafter referred to as session 2)
  • the plane connection is: terminal equipment-auxiliary access equipment-UPF network element 2-DN.
  • the two sessions are redundant sessions, and the same service packets are transmitted, and the end point (that is, the terminal device or the DN performs packet deduplication and replication).
  • the session 1 is established through the signaling interaction between the terminal device, the main access device, the AMF network element and the SMF network element; through the communication between the terminal device, the main access device, the AMF network element and the SMF network element
  • the signaling interaction establishes session 2.
  • the network element or entity corresponding to the first session management network element may be SMF network element 1 in the 5G network
  • the second session management network element described above is The corresponding network element or entity may be SMF network element 2 in the 5G network
  • the network element or entity corresponding to the above-mentioned policy control network element may be the PCF network element in the 5G network
  • the above-mentioned application function network element corresponds to
  • the network element or entity may be an AF network element in the 5G network.
  • the 5G network may also include primary access equipment, UPF network element 1, auxiliary access equipment, UPF network element 2, AMF network element, UDM network element, UDR network element, etc.
  • primary access equipment UPF network element 1
  • auxiliary access equipment UPF network element 2
  • AMF network element auxiliary access equipment
  • UDM network element UDM network element
  • UDR network element etc.
  • the terminal equipment is respectively connected to the primary access equipment and the secondary access equipment.
  • the primary access device communicates with UPF network element 1 through N3, and the secondary access device communicates with UPF network element 2 through N3.
  • UPF network element 1 and UPF network element 2 respectively communicate with the DN through N6.
  • the primary access device communicates with the secondary access device through Xn, the primary access device communicates with the AMF network element through N2, the UPF network element 1 communicates with the SMF network element 1 through N4, and the UPF network element 2 communicates with the SMF network element through N4. 2 Communication.
  • Control plane network elements such as AMF network elements, SMF network elements 1, SMF network elements 2, PCF network elements, UDM network elements, or UDR network elements interact with service-oriented interfaces.
  • the servicing interface provided by AMF network elements to the outside can be Namf; the servicing interface provided by SMF network element 1 and SMF network element 2 can be Nsmf; the servicing interface provided by PCF network elements can be Npcf; UDM network element
  • the servicing interface provided externally can be Nudm; the servicing interface provided externally by UDR network elements can be Nudr; the servicing interface provided externally by AF network elements can be Naf.
  • the 5G system architecture diagram in the 23501 standard which will not be repeated here.
  • FIG. 4 uses terminal equipment to establish two sessions to achieve end-to-end high-reliability transmission between the terminal equipment and the DN.
  • the two sessions are controlled by two SMF network elements respectively.
  • the user plane connection corresponding to one session (hereinafter referred to as PDU session 1) is: terminal device-primary access device-UPF network element 1-DN; another session (hereinafter referred to as session 2) corresponds to The user plane connection is: terminal equipment-auxiliary access equipment-UPF network element 2-DN.
  • the two sessions are redundant sessions, and the same service packets are transmitted, and the end point (that is, the terminal device or the DN performs packet deduplication and replication).
  • session 1 is established through signaling interaction between terminal equipment, main access equipment, AMF and SMF network element 1; through the communication between terminal equipment, main access equipment, AMF network elements, and SMF network element 2.
  • the signaling interaction establishes session 2.
  • FIG. 3 or FIG. 4 are all exemplary, taking two redundant sessions established by a terminal device to select the same PCF network element as an example for description.
  • the two redundant sessions established by the terminal device may also select different PCF network elements, which is not specifically limited in the embodiment of the present application.
  • the session in the embodiment of the present application may be a PDU session or other sessions, which are described here in a unified manner, and will not be described in detail below.
  • the terminal device in the embodiment of the present application may be a device used to implement a wireless communication function, such as a terminal or a chip that can be used in a terminal.
  • the terminal may be a user equipment (UE), an access terminal, a terminal unit, a terminal station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, and wireless communication in a 5G network or a future evolved PLMN.
  • the access terminal can be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), with wireless communication Functional handheld devices, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices or wearable devices, virtual reality (VR) terminal devices, augmented reality (AR) terminal devices, industrial control (industrial) Wireless terminal in control), wireless terminal in self-driving, wireless terminal in remote medical, wireless terminal in smart grid, wireless terminal in transportation safety (transportation safety) Terminal, wireless terminal in smart city, wireless terminal in smart home, etc.
  • the terminal can be mobile or fixed.
  • the access equipment in the embodiments of this application is equipment that provides access for terminal equipment, including radio access network (RAN) equipment and access equipment.
  • RAN radio access network
  • AN Access network
  • the RAN equipment is mainly a wireless network equipment of the 3GPP network
  • the AN may be an access network equipment defined by non-3GPP.
  • the RAN equipment is mainly responsible for functions such as radio resource management, QoS management, data compression and encryption on the air interface side.
  • the RAN equipment may include various forms of base stations, such as: macro base stations, micro base stations (also referred to as small stations), relay stations, and access points.
  • base stations such as: macro base stations, micro base stations (also referred to as small stations), relay stations, and access points.
  • the names of devices with base station functions may be different.
  • 5G systems they are called RAN or gNB (5G NodeB); in long term evolution, In the LTE system, it is called an evolved NodeB (evolved NodeB, eNB or eNodeB); in the third generation (3rd generation, 3G) system, it is called a NodeB (NodeB), etc.
  • the AN equipment allows the terminal equipment and the 3GPP core network to use non-3GPP technology for interconnection and intercommunication.
  • the non-3GPP technology includes, for example, wireless fidelity (Wi-Fi), worldwide interoperability for microwave access, WiMAX), code division multiple access (code division multiple access, CDMA) networks, etc.
  • the policy control network element, the session management network element (including the first session management network element or the second session management network element) or the application function network element in the embodiment of the present application may also be called a communication device, which may It is a general-purpose device or a special-purpose device, which is not specifically limited in the embodiment of the present application.
  • the related functions of the policy control network element, the session management network element (including the first session management network element or the second session management network element) or the application function network element in the embodiment of the present application can be implemented by one device, or It may be implemented jointly by multiple devices, or may be implemented by one or more functional modules in one device, which is not specifically limited in the embodiment of the present application. It is understandable that the above functions can be network elements in hardware devices, software functions running on dedicated hardware, or a combination of hardware and software, or instantiated on a platform (for example, a cloud platform) Virtualization function.
  • FIG. 5 is a schematic structural diagram of a communication device 500 provided by an embodiment of the application.
  • the communication device 500 includes one or more processors 501, a communication line 502, and at least one communication interface (in FIG. 5, the communication interface 504 and one processor 501 are taken as an example for illustration), optional
  • the memory 503 may also be included.
  • the processor 501 may be a general-purpose central processing unit (central processing unit, CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more programs for controlling the execution of the program of this application. integrated circuit.
  • CPU central processing unit
  • ASIC application-specific integrated circuit
  • the communication line 502 may include a path for connecting different components.
  • the communication interface 504 may be a transceiver module for communicating with other devices or communication networks, such as Ethernet, RAN, and wireless local area networks (WLAN).
  • the transceiver module may be a device such as a transceiver or a transceiver.
  • the communication interface 504 may also be a transceiver circuit located in the processor 501 to implement signal input and signal output of the processor.
  • the memory 503 may be a device having a storage function. For example, it can be read-only memory (ROM) or other types of static storage devices that can store static information and instructions, random access memory (RAM), or other types that can store information and instructions Dynamic storage devices can also be electrically erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD-ROM), or other optical disk storage, optical disc storage ( Including compact discs, laser discs, optical discs, digital universal discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or can be used to carry or store desired program codes in the form of instructions or data structures and can be stored by a computer Any other media taken, but not limited to this.
  • the memory may exist independently and is connected to the processor through the communication line 502. The memory can also be integrated with the processor.
  • the memory 503 is used to store computer execution instructions for executing the solution of the present application, and the processor 501 controls the execution.
  • the processor 501 is configured to execute computer-executable instructions stored in the memory 503, so as to implement the policy control method provided in the embodiment of the present application.
  • the processor 501 may also perform processing-related functions in the policy control method provided in the following embodiments of the present application, and the communication interface 504 is responsible for communicating with other devices or communication networks.
  • the application embodiment does not specifically limit this.
  • the computer-executable instructions in the embodiments of the present application may also be referred to as application program code, which is not specifically limited in the embodiments of the present application.
  • the processor 501 may include one or more CPUs, such as CPU0 and CPU1 in FIG. 5.
  • the communication device 500 may include multiple processors, such as the processor 501 and the processor 508 in FIG. 5.
  • processors can be a single-CPU (single-CPU) processor or a multi-core (multi-CPU) processor.
  • the processor here may refer to one or more devices, circuits, and/or processing cores for processing data (for example, computer program instructions).
  • the communication device 500 may further include an output device 505 and an input device 506.
  • the output device 505 communicates with the processor 501 and can display information in a variety of ways.
  • the output device 505 may be a liquid crystal display (LCD), a light emitting diode (LED) display device, a cathode ray tube (CRT) display device, or a projector (projector) Wait.
  • the input device 506 communicates with the processor 501 and can receive user input in a variety of ways.
  • the input device 506 may be a mouse, a keyboard, a touch screen device, or a sensor device.
  • the aforementioned communication device 500 may sometimes be referred to as a communication device, which may be a general-purpose device or a special-purpose device.
  • the communication device 500 may be a desktop computer, a portable computer, a network server, a personal digital assistant (PDA), a mobile phone, a tablet computer, a wireless terminal device, an embedded device, the foregoing terminal device, the foregoing network device, or a picture 5 similar structure equipment.
  • PDA personal digital assistant
  • the embodiment of the present application does not limit the type of the communication device 500.
  • the policy control method corresponds to the policy update process, including The following steps:
  • the AF network element acquires at least one of the first address of the terminal device or the second address of the terminal device.
  • the AF network element may obtain the PCF network element information from the binding support function (BSF) network element after determining that the service of the PCF network element needs to be invoked. And for a highly reliable service, when two sessions are used to transmit the service, the AF network element obtains at least one of the first address of the terminal device or the second address of the terminal device. The first session corresponding to the first address and the second session corresponding to the second address are redundant sessions associated with the terminal device.
  • BSF binding support function
  • the AF network element sends message 1 to the PCF network element.
  • the PCF network element receives message 1 from the AF network element.
  • the message 1 includes at least one of the first address of the terminal device or the second address of the terminal device, application information or service information, and the like.
  • the message 1 may be a policy authorization create (policy authorization create) message, for example.
  • the application information or service information in the embodiment of the present application may include, for example, a flow description or application identifier, bandwidth requirements, etc., which is not specifically limited in the embodiment of the present application.
  • the PCF network element determines the first policy rule of the first session corresponding to the first address and the second policy rule of the second session corresponding to the second address.
  • the first policy rule includes first QoS control information
  • the second policy rule includes second QoS control information
  • the first QoS control information is QoS control information required for the first session transmission service
  • the second QoS control information is second QoS control information required by the session transmission service.
  • the PCF network element determining the first policy rule of the first session corresponding to the first address and the second policy rule of the second session corresponding to the second address may include: if the message 1 above Including the first address of the terminal device and the second address of the terminal device means that the first session corresponding to the first address and the second session corresponding to the second address are redundant sessions associated with the terminal device, and the PCF network element can be based on The application information or service information determines the first policy rule of the first session corresponding to the first address and the second policy rule of the second session corresponding to the second address.
  • the PCF network element may also determine the context of the first session according to the first address; and the PCF network element may determine the context of the second session according to the second address. Furthermore, when the PCF network element determines the first policy rule and the second policy rule, it can determine the first policy rule and the second policy rule in combination with the context of the first session or the context of the second session, which is not specifically limited here.
  • the PCF network element determining the first policy rule of the first session corresponding to the first address and the second policy rule of the second session corresponding to the second address may include: 1 includes the first address of the terminal device, the PCF network element can determine the context of the first session according to the first address in message 1, and then can learn that the first session corresponding to the first address is the terminal device according to the context of the first session The PCF network element can determine the first policy rule of the first session corresponding to the first address and the second policy rule of the second session associated with the first session according to the application information or service information.
  • the PCF network element determining the first policy rule of the first session corresponding to the first address and the second policy rule of the second session corresponding to the second address may include: 1 includes the second address of the terminal device, the PCF network element can determine the context of the second session according to the second address in message 1, and then can learn that the second session corresponding to the second address is the terminal device according to the context of the second session The PCF network element can determine the second policy rule of the second session corresponding to the second address and the first policy rule of the first session associated with the second session according to the application information or service information.
  • the PCF network element determines the first policy rule and the second policy rule, it can also be determined in combination with the context of the first session or the context of the second session.
  • the first policy rule and the second policy rule are not specifically limited here.
  • the packet loss rate in the QoS control information is 10 -6 .
  • the packet loss rate in the QoS control information used by the transmission service in each session It can be set to 10 -5 .
  • the PCF network element sends message 2 to the SMF network element serving the first session and the second session.
  • the SMF network element receives the message 2 from the PCF network element.
  • the message 2 includes the first policy rule and the second policy rule.
  • the message 2 may be a session management (session management, SM) policy control update notification (policy control update notification) request message, for example.
  • SM session management
  • policy control update notification policy control update notification
  • the communication system shown in FIG. 2 is applied to the 5G network shown in FIG. 3 as an example for description, that is, it corresponds to a scenario where two redundant sessions correspond to the same SMF network element.
  • the communication system shown in Fig. 2 is applied to the 5G network shown in Fig. 4 as an example, it corresponds to a scenario in which two redundant sessions correspond to different SMF network elements.
  • the PCF network element needs to The SMF network element 1 corresponding to the first session sends the first policy rule, and the PCF network element needs to send the second policy rule to the SMF network element 2 corresponding to the second session, which is explained here in a unified manner, and will not be repeated in the following.
  • the PCF network element may also send the first policy rule and the second policy rule to the SMF network element serving the first session and the second session by sending two messages to the SMF network element.
  • the PCF network element can also send message A and message B to the SMF network element serving the first session and the second session, where message A contains the first policy rule, and message B contains the second policy rule.
  • message A contains the first policy rule
  • message B contains the second policy rule.
  • S605 The SMF network element sends message 3 to the PCF network element.
  • the PCF network element receives the message 3 from the SMF network element.
  • the message 3 may be an SM policy control update notification response message, for example.
  • the SMF network element may send a session modification request to the AMF network element to trigger the session modification process.
  • the SMF network element may send a session modification request to the AMF network element to trigger the session modification process.
  • the PCF network element Based on the policy control method provided by the embodiments of the present application, the PCF network element considers the factor that the first and second sessions are redundant sessions when determining the first policy rule of the first session and the second policy rule of the second session Therefore, in a scenario where a service is transmitted through two redundant sessions to ensure high reliability of the service, not only the demand for network resources is reduced, but the independent control of each session can also avoid the unsatisfied service requirements caused by the independent control of each session. Cause the problem of business transmission failure.
  • the actions of the SMF network element or the AF network element in the above steps S601 to S605 can be executed by the processor 501 in the communication device 500 shown in FIG. 5 calling the application program code stored in the memory 503. This embodiment There are no restrictions.
  • the PCF network element separately determines the first policy rule of the first session corresponding to the first address and the second policy rule of the second session corresponding to the second address after receiving the message 1 as Examples are explained.
  • the PCF network element may also generate the same policy rule for the first session and the second session, that is, the PCF network element determines the first session corresponding to the first address A policy rule of the second session corresponding to the second address, where the policy rule includes QoS control information, and the QoS control information is QoS control information required by the first session and the second session to transmit services.
  • the PCF network element may send the policy rule to the SMF network element serving the first session and the second session; or, the PCF network element may send the policy rule to the SMF network element serving the first session and the second session respectively.
  • SMF network element may send the policy rule to the SMF network element serving the first session and the second session.
  • a policy control method provided by an embodiment of this application corresponds to the establishment process of the first session in the redundant session (here, it is assumed to be session 1), and includes the following steps:
  • the AMF network element sends message 1 to the SMF network element.
  • the SMF network element receives message 1 from the AMF network element.
  • the message 1 includes the session ID (session ID) of session 1, the data network name (DNN) 1 corresponding to session 1, or the single network slice selection assistance information (S-NSSAI) ) 1. And user permanent identifier (subscription permanent identifier, SUPI) and other information.
  • session ID session ID
  • DNN data network name
  • S-NSSAI single network slice selection assistance information
  • SUPI subscription permanent identifier
  • the message 1 may be, for example, a session creation SM context request.
  • the SMF network element sends message 2 to the UDM network element.
  • the UDM network element receives the message 2 from the SMF network element.
  • the message 2 includes information such as DNN1 or S-NSSAI1 corresponding to session 1, and DNN2 or S-NSSAI2 corresponding to DNN1 or S-NSSAI1.
  • the message 2 may be, for example, a subscription data acquisition request.
  • the DNN2 or S-NSSAI2 corresponding to the session 2 associated with the session 1 may be determined according to the DNN1 or S-NSSAI1 corresponding to the session 1 included in the message 1 and local configuration information.
  • the local configuration information may be as shown in Table 1, for example.
  • table 1 only exemplarily shows the mapping relationship between the associated DNN or S-NSSAI.
  • the table can also include more corresponding information, which is not discussed in the embodiment of this application. Specific restrictions.
  • the UDM network element sends message 3 to the SMF network element.
  • the SMF network element receives the message 3 from the UDM network element.
  • the message 3 includes the subscription information of the terminal device.
  • the message 3 may be a subscription data acquisition response, for example.
  • session 1 is the first redundant session
  • the message 3 does not include the session information of session 2 associated with session 1 .
  • the foregoing message 2 may not include DNN2 or S-NSSAI2 corresponding to DNN1 or S-NSSAI1.
  • the UDM network element determines that the UDM network element does not include the session information of session 2 associated with session 1 according to the DNN1 or S-NSSAI1 corresponding to session 1 provided by the SMF network element and combined with local configuration information. Make specific restrictions.
  • the SMF network element determines that the established session 1 is a redundant session.
  • the SMF network element may determine that the established session 1 is a redundant session according to the DNN1 or S-NSSAI1 corresponding to the session 1 and the subscription information obtained from the UDM network element.
  • the SMF network element determines the PCF network element serving session 1.
  • the SMF network element may determine the PCF network element serving the session 1 according to the existing PCF network element selection method.
  • the SMF network element sends a message 4 to the UDM network element.
  • the UDM network element receives the message 4 from the SMF network element.
  • the message 4 includes the session identifier of session 1, DNN1 or S-NSSAI1 corresponding to session 1, and the identifier of the PCF network element serving session 1, where the identifier of the PCF network element is used for session 2 associated with session 1. Make sure to use the same PCF network element.
  • the message 4 may be a registration request, for example.
  • the UDM network element sends a message 5 to the SMF network element.
  • the SMF network element receives the message 5 from the UDM network element.
  • the message 5 may be a registration response, for example.
  • the SMF network element sends a message 6 to the PCF network element serving session 1.
  • the PCF network element receives the message 6 from the SMF network element.
  • the message 6 includes the information of the session 1, and the information of the session 1 includes the first indication information, and the first indication information is used to indicate that the session 1 is a redundant session.
  • the message 6 may be, for example, an SM policy control creation request.
  • the first indication information may include a redundancy sequence number (RSN), for example.
  • RSN redundancy sequence number
  • the RSN corresponding to session 1 here can be set to 1, indicating that the first redundant session is established.
  • the RSN may also be used to indicate that the access device of session 1 is the primary access device or the secondary access device, which is not specifically limited here.
  • the information of session 1 may further include, for example, the session identifier of session 1, DNN1 or S-NSSAI1 corresponding to session 1, which is not specifically limited here.
  • the PCF network element obtains the contract information of the terminal device from the UDR network element.
  • the PCF network element learns that session 1 is a redundant session according to the first indication information. Furthermore, the PCF network element generates policy rule 1 of session 1. Among them, the policy rule 1 includes QoS control information 1.
  • the QoS control information 1 is the QoS control information required by the session 1 to transmit the service when the session 1 and the session 2 are used to transmit the service.
  • the PCF network element may generate the policy rule 1 of the session 1 according to the subscription information of the terminal device.
  • the PCF network element can generate it according to the subscription information of the terminal device and the RSN information Policy rule 1 for session 1. For example, if the PCF network element determines that session 1 uses the primary access device for user plane transmission, then the policy rule 1 of session 1 is the policy rule when the primary access device is used for transmission; or, if the PCF network element determines that session 1 uses the secondary connection When the incoming device performs user plane transmission, the policy rule 1 of session 1 is the policy rule when the secondary access device is used for transmission, which is described here in a unified manner, and will not be repeated in the following.
  • the PCF network element generates a policy rule 2 of the session 2 associated with the session 1.
  • the policy rule 2 includes QoS control information 2.
  • the QoS control information 2 is the QoS control information required by the session 2 to transmit the service when the session 1 and the session 2 are used to transmit the service.
  • the PCF network element learns that session 1 is a redundant session according to the first indication information, while generating policy rule 1 of session 1, it can generate session 2 according to the subscription information of the terminal device.
  • the policy rule 2 is coordinated policy rules.
  • the PCF network element can generate it according to the subscription information of the terminal device and the RSN information Policy rule 2 for session 2.
  • step S710 and step S711 are described by taking the PCF network element generating policy rules for session 1 and session 2 respectively as an example.
  • the policy rule 1 of session 1 and the policy rule 2 of session 2 may be the same or different, which is not specifically limited in the embodiment of the present application.
  • the PCF network element may also generate a policy rule for session 1 and session 2.
  • the policy rule includes QoS control information, and the QoS control information is the QoS required for the transmission services of session 1 and session 2.
  • the control information is not specifically limited in this embodiment of the application.
  • the PCF network element sends a message 7 to the SMF network element serving session 1.
  • the SMF network element receives the message 7 from the PCF network element.
  • the message 7 includes the policy rule 1 of session 1.
  • the message 7 may be, for example, an SM policy control creation response.
  • the PCF network element Based on the policy control method provided in the embodiment of the present application, the PCF network element considers the factor that the session 1 is a redundant session when determining the policy rule 1 of the session 1.
  • the PCF network element considers the factor that the session 2 is a redundant session when determining the policy rule 2 of the session 2. Therefore, in a scenario where a service is transmitted through two redundant sessions to ensure high reliability of the service, not only the demand for network resources is reduced, but the independent control of each session can also avoid the unsatisfied service requirements caused by the independent control of each session. The problem of business transmission failure.
  • the actions of the SMF network element or the PCF network element in the above steps S701 to S712 may be executed by the processor 501 in the communication device 500 shown in FIG. 5 calling the application program code stored in the memory 503. There are no restrictions.
  • the policy control method corresponds to the establishment process of the second session in the redundant session (here, it is assumed to be session 2), and includes the following steps:
  • the AMF network element sends message 1 to the SMF network element.
  • the SMF network element receives message 1 from the AMF network element.
  • the message 1 includes the session identifier of session 2, DNN2 or S-NSSAI2 corresponding to session 2, and SUPI information.
  • the message 1 may be, for example, a session creation SM context request.
  • the SMF network element sends message 2 to the UDM network element.
  • the UDM network element receives the message 2 from the SMF network element.
  • the message 2 includes information such as DNN2 or S-NSSAI2 corresponding to session 2 and DNN1 or S-NSSAI1 corresponding to DNN2 or S-NSSAI2.
  • the message 2 may be a subscription data acquisition request, for example.
  • the DNN1 or S-NSSAI1 corresponding to Session 1 associated with Session 2 may be determined according to the DNN2 or S-NSSAI2 corresponding to Session 2 included in message 1 and local configuration information.
  • the local configuration information may be as shown in Table 1 above, for example.
  • the UDM network element sends message 3 to the SMF network element.
  • the SMF network element receives the message 3 from the UDM network element.
  • the message 3 includes the subscription information of the terminal device.
  • the UDM network element stores session 1 information associated with session 2.
  • the session 1 information may include, for example, the session ID of session 1, and the DNN1 corresponding to session 1. Or S-NSSAI1 and the identity of the PCF network element serving session 1.
  • the message 3 may be, for example, a subscription data acquisition response.
  • the foregoing message 2 may not include DNN1 or S-NSSAI1 corresponding to DNN2 or S-NSSAI2.
  • the UDM network element determines the session information of the session 1 associated with session 2 on the UDM network element according to the DNN2 or S-NSSAI2 corresponding to the session 2 provided by the SMF network element, combined with the local configuration information. This is not done in the embodiment of this application. Specific restrictions.
  • the SMF network element determines that the established session 2 is a redundant session.
  • the SMF network element may determine that the established session 2 is a redundant session according to the DNN2 or S-NSSAI2 corresponding to the session 2 and the subscription information obtained from the UDM network element.
  • the SMF network element determines the PCF network element serving session 2.
  • the SMF network element may determine that the PCF network element of service session 2 is identified by the identity of the PCF network element of service session 1 according to the information of session 1 associated with session 2 included in message 3. PCF network element.
  • S806 The SMF network element sends a message 4 to the UDM network element.
  • the UDM network element receives the message 4 from the SMF network element.
  • the message 4 includes the session identifier of session 2, the DNN2 or S-NSSAI2 corresponding to session 2, and the identifier of the PCF network element serving session 2.
  • the message 4 may be a registration request, for example.
  • the UDM network element sends message 5 to the SMF network element.
  • the SMF network element receives the message 5 from the UDM network element.
  • the message 5 may be a registration response, for example.
  • the SMF network element sends message 6 to the PCF network element serving session 2.
  • the PCF network element receives the message 6 from the SMF network element.
  • the message 6 includes the information of session 2 and the information of associated session 1.
  • the message 6 may be, for example, an SM policy control creation request.
  • the message 6 may also be an SM policy control update request. That is, at this time, the policy association established between the SMF network element and the PCF network element in session 1 can be reused, which is not specifically limited in the embodiment of the present application.
  • the session 2 information may also include the RSN corresponding to session 2.
  • the RSN corresponding to session 2 may be set to 2, indicating that the second redundant session is established.
  • the RSN corresponding to session 2 may also be used to indicate that the access device of session 2 is the primary access device or the secondary access device, which is not specifically limited here.
  • the information associated with session 1 may include one or more of the session identifier of session 1, DNN1 or S-NSSAI1 corresponding to session 1, or RSN corresponding to session 1. Specific restrictions.
  • the PCF network element obtains the contract information of the terminal device from the UDR network element.
  • the PCF network element learns that session 2 is a redundant session according to the information associated with session 1. Furthermore, the PCF network element determines the policy rule 2 of the session 2 according to the information of the associated session 1. Among them, the policy rule 2 includes QoS control information 2, and the QoS control information 2 is the QoS control information required by the session 2 to transmit services.
  • the PCF network element determines the policy rule 2 of session 2 based on the information of the associated session 1, which may include: the PCF network element determines the context of session 1 based on the information of the associated session 1; PCF network element Obtain policy rule 2 from the context of session 1 (this situation corresponds to a scenario where policy rule 2 of session 2 is generated at the same time when session 1 is established); or, the PCF network element obtains policy rule 1 of session 1 from the context of session 1 , The PCF network element generates the policy rule 2 of the session 2 according to the policy rule 1 of the session 1 (this situation corresponds to a scenario where only the policy rule 1 of the session 1 is generated when the session 1 is established).
  • the PCF network element when the PCF network element generates the policy rule 2 of session 2 according to the policy rule 1 of session 1, it can also be combined with session 2 to correspond to The RSN generated policy rule 2 for session 2, which is not specifically limited here.
  • the PCF network element sends a message 7 to the SMF network element serving session 2.
  • the SMF network element receives the message 7 from the PCF network element.
  • the message 7 includes the policy rule 2 of session 2.
  • the message 7 may be, for example, an SM policy control creation response.
  • the SMF network element of service session 2 may be the same SMF network element of service session 1 in the embodiment shown in FIG. 7, or may be a different SMF network element. There is no specific limitation here.
  • the PCF network element since the PCF network element considers the factor that the session 2 is a redundant session when determining the policy rule 2 of the session 2, therefore, it guarantees the service by transmitting one service through two redundant sessions. Under the high-reliability scenario, it not only reduces the demand for network resources, but also avoids the problem of service transmission failure caused by unsatisfied service requirements caused by independent control of each session.
  • the actions of the SMF network element or the PCF network element in the above steps S801 to S811 can be executed by the processor 501 in the communication device 500 shown in FIG. 5 calling the application program code stored in the memory 503. There are no restrictions.
  • the SMF network element can determine the PCF network element of service session 2 as the identifier of the PCF network element of service session 1 according to the information of session 1 associated with session 2 included in message 3.
  • the identified PCF network element is taken as an example for description.
  • the policy update process described in FIG. 6 may be based on the session establishment process shown in FIG. 7 and FIG. 8, where the first session may be session 1 in FIG. 7 and the second session may be the session establishment process in FIG. Session 2; or, the second session may be session 1 in FIG. 7, and the first session may be session 2 in FIG. 8.
  • the session establishment process shown in FIG. 7 and FIG. 8 taking the communication system shown in FIG. 2 applied to the 5G network shown in FIG. 3 as an example, as shown in FIG. 9, another example provided by this embodiment of the application is
  • a strategy control method which corresponds to a strategy update process, includes the following steps:
  • step S901 is the same as step S601 in the embodiment shown in FIG. 6.
  • step S601 please refer to the above step S601, which will not be repeated here.
  • the AF network element sends at least one of message 1 or message 2 to the PCF network element.
  • the PCF network element receives at least one of message 1 or message 2 from the AF network element.
  • the message 1 includes the first address of the terminal device, and application information or service information.
  • the message 2 includes the second address of the terminal device, and application information or service information.
  • application information or service information reference may be made to the embodiment shown in FIG. 6, which will not be repeated here.
  • step S901 the AF network element only obtains the first address of the terminal device
  • the AF network element in step S902 may only send message 1 to the PCF network element; or, optionally, if in step S901, the AF network element To obtain only the second address of the terminal device, the AF network element may only send message 2 to the PCF network element in step S902; or, optionally, if in step S901, the AF network element obtains the first address of the terminal device and the terminal device Then, in step S902, the AF network element sends message 1 and message 2 to the PCF network element.
  • the PCF network element determines the first policy rule of the first session corresponding to the first address and the second policy rule of the second session corresponding to the second address.
  • the first session here may be session 1 in FIG. 7 and the second session may be session 2 in FIG. 8; or, the second session may be session 1 in FIG. 7, and the first session may be session 1 in FIG. 8. No specific limitation is made here.
  • the first policy rule includes first QoS control information
  • the second policy rule includes second QoS control information
  • the first QoS control information is QoS control information required for the first session transmission service
  • the second QoS control information is second QoS control information required by the session transmission service.
  • the first QoS control information and the second QoS control information are coordinated QoS control information.
  • the PCF network element determining the first policy rule of the first session corresponding to the first address and the second policy rule of the second session corresponding to the second address may include: if in step S902 above The AF network element sends message 1 and message 2 to the PCF network element, the PCF network element can determine the context of the first session according to the first address, and the context of the second session according to the second address, and the PCF network element can determine the context of the second session according to the first session.
  • the context of the second session and the context of the second session determine that the first session corresponding to the first address and the second session corresponding to the second address are redundant sessions associated with the terminal device; and the PCF network element may determine the first address according to application information or service information The corresponding first policy rule of the first session and the second policy rule of the second session corresponding to the second address.
  • the PCF network element determines the first policy rule and the second policy rule, it can determine the first policy rule and the second policy rule in combination with the context of the first session or the context of the second session, which is not specifically limited here.
  • the PCF network element determining the first policy rule of the first session corresponding to the first address and the second policy rule of the second session corresponding to the second address may include: In S902, the AF network element only sends message 1 to the PCF network element, and the PCF network element can determine the context of the first session according to the first address in message 1, and then can learn the first address corresponding to the first address according to the context of the first session.
  • the session is a redundant session of the terminal device, and the PCF network element can determine the first policy rule of the first session corresponding to the first address and the second policy rule of the second session associated with the first session according to application information or service information.
  • the PCF network element determining the first policy rule of the first session corresponding to the first address and the second policy rule of the second session corresponding to the second address may include: In S902, the AF network element only sends message 2 to the PCF network element, and the PCF network element can determine the context of the second session according to the second address in message 2, and then can learn the second address corresponding to the second address according to the context of the second session.
  • the session is a redundant session of the terminal device, and the PCF network element can determine the second policy rule of the second session corresponding to the second address and the first policy rule of the first session associated with the second session according to the application information or service information.
  • the PCF network element may also combine the context of the first session or the second session when determining the first policy rule and the second policy rule above.
  • the context of determines the first policy rule and the second policy rule which is not specifically limited here.
  • the PCF network element sends message 3 to the SMF network element serving the first session and the second session.
  • the SMF network element receives the message 3 from the PCF network element.
  • the message 3 includes the first policy rule and the second policy rule.
  • the message 3 may be, for example, an SM policy control update notification request message.
  • the communication system shown in FIG. 2 is applied to the 5G network shown in FIG. 3 as an example for description, that is, it corresponds to a scenario where two redundant sessions correspond to the same SMF network element.
  • the communication system shown in Fig. 2 is applied to the 5G network shown in Fig. 4 as an example, it corresponds to a scenario in which two redundant sessions correspond to different SMF network elements.
  • the PCF network element needs to The SMF network element 1 corresponding to the first session sends the first policy rule, and the PCF network element needs to send the second policy rule to the SMF network element 2 corresponding to the second session, which is explained here in a unified manner, and will not be repeated in the following.
  • S905 The SMF network element sends a message 4 to the PCF network element.
  • the PCF network element receives the message 4 from the SMF network element.
  • the message 4 may be, for example, an SM policy control update notification response message.
  • the SMF network element may send a session modification request to the AMF network element to trigger the session modification process.
  • the SMF network element may send a session modification request to the AMF network element to trigger the session modification process.
  • the PCF network element Based on the policy control method provided by the embodiments of the present application, the PCF network element considers the factor that the first and second sessions are redundant sessions when determining the first policy rule of the first session and the second policy rule of the second session Therefore, in a scenario where a service is transmitted through two redundant sessions to ensure high reliability of the service, not only the demand for network resources is reduced, but the independent control of each session can also avoid the unsatisfied service requirements caused by the independent control of each session. Cause the problem of business transmission failure.
  • the actions of the SMF network element or the AF network element in the above steps S901 to S905 can be executed by the processor 501 in the communication device 500 shown in FIG. 5 calling the application program code stored in the memory 503. This embodiment There are no restrictions.
  • the AF network element may also decompose application requirements or service requirements, that is, the first session corresponds to the first application requirement or the first service requirement.
  • the second session corresponds to the second application requirement or the second business requirement.
  • a PCF network element when a PCF network element generates a policy rule, it can generate a corresponding policy rule according to corresponding application requirements or business requirements, which is not specifically limited in the embodiment of the present application.
  • the policy control method corresponds to the policy update process and includes the following steps:
  • the PCF network element determines an update policy rule.
  • the PCF network element receives the policy association termination process of one of the redundant sessions sent by the SMF network element, and may determine to update the policy rule of the other redundant session.
  • the PCF network element deletes the policy rule of a redundant session, and updates the associated policy rule of another redundant session.
  • the QoS control information included in the updated policy rule is the QoS control information required when only using another associated redundant session to transmit services.
  • the PCF network element sends message 1 to the SMF network element serving the associated redundant session, and the SMF network element receives message 1 from the PCF network element.
  • the message 1 includes the updated policy rule of another associated redundant session.
  • the message 1 may be an SM policy control update notification request message, for example.
  • the SMF network element sends message 2 to the PCF network element.
  • the PCF network element receives the message 2 from the SMF network element.
  • the message 2 may be, for example, an SM policy control update notification response message.
  • the PCF network element may also notify the SMF network element serving the redundant session to delete the policy rule of the redundant session; if the policy rule is this For the last policy rule of the redundant session, the SMF network element can initiate the deletion process of the redundant session, which is not specifically limited in the embodiment of the present application.
  • the SMF network element may send a session modification request to the AMF network element to trigger the session modification process.
  • the SMF network element may send a session modification request to the AMF network element to trigger the session modification process.
  • the PCF network element can determine appropriate policy rules for the terminal device session in real time.
  • the actions of the SMF network element or the PCF network element in the above steps S1001 to S1004 can be executed by the processor 501 in the communication device 500 shown in FIG. 5 calling the application program code stored in the memory 503. There are no restrictions.
  • the PCF network element may decide to terminate the policy association process of another associated redundant session, namely PCF
  • the network element and the SMF network element delete the policy rules for two redundant sessions, which is not specifically limited in the embodiment of the present application.
  • the communication system shown in FIG. 1 is applied to the 5G network shown in FIG. 3.
  • the PCF network element serving the redundant session may be the same PCF network element or Different PCF network elements (that is, the selection of PCF network elements is not restricted) is taken as an example.
  • another policy control method provided by this embodiment of the application corresponds to the first one in the redundant session.
  • the establishment of a session (assumed as session 1 here) includes the following steps:
  • S1101-S1104 are the same as steps S701-S704 in the embodiment shown in FIG. 7.
  • steps S701-S704 are the same as steps S701-S704 in the embodiment shown in FIG. 7.
  • steps S701-S704 please refer to the above-mentioned steps S701-S704, which will not be repeated here.
  • the SMF network element determines the PCF network element 1 serving session 1.
  • the SMF network element can determine the PCF network element 1 serving the session 1 according to the existing method of PCF network element selection. .
  • the SMF network element sends a message 4 to the UDM network element.
  • the UDM network element receives the message 4 from the SMF network element.
  • the message 4 includes the session identifier of session 1 and the DNN1 or S-NSSAI1 corresponding to session 1.
  • the message 4 may be a registration request, for example.
  • step S1106 there is no inevitable order of execution between step S1106 and steps S1102-S1105, and step S1106 can be executed at any time after step S1101, which is explained here in a unified manner and will not be repeated hereafter.
  • the UDM network element sends a message 5 to the SMF network element.
  • the SMF network element receives the message 5 from the UDM network element.
  • the message 5 may be a registration response, for example.
  • S1108-S1111 are similar to steps S708-S710 in the embodiment shown in FIG. 7, except that the PCF network element in the above steps S708-S710 is replaced with the PCF network element 1 in the embodiment of the application, and the remaining related descriptions Refer to the above steps S708-S710, which will not be repeated here.
  • PCF network element 1 sends message 7 to UDR network element.
  • the UDR network element receives the message 7 from the PCF network element 1.
  • the message 7 includes the policy rule 1 of session 1.
  • the message 7 may be a data management (data management, DM) update request message, for example.
  • DM data management
  • the message 7 may also include the policy rule 1 of the session 1.
  • the UDR network element sends a message 8 to the PCF network element 1.
  • PCF network element 1 receives message 8 from UDR network element.
  • the message 8 may be a DM update response message, for example.
  • the PCF network element 1 sends a message 9 to the SMF network element serving session 1.
  • the SMF network element receives the message 9 from the PCF network element 1.
  • the message 9 includes the policy rule 1 of session 1.
  • the message 9 may be an SM policy control creation response, for example.
  • step S1112 can be executed first, and then step S1114; or step S1114 can be executed first, and then step S1112 can be executed; It is also possible to perform step S1112 and step S1114 at the same time, which is not specifically limited in the embodiment of the present application.
  • the PCF network element 1 Based on the policy control method provided by the embodiment of the present application, the PCF network element 1 considers the factor that the session 1 is a redundant session when determining the policy rule 1 of the session 1.
  • the PCF network element 1 considers the factor that the session 2 is a redundant session when determining the policy rule 2 of the session 2. Therefore, in a scenario where a service is transmitted through two redundant sessions to ensure high reliability of the service, not only the demand for network resources is reduced, but the independent control of each session can also avoid the unsatisfied service requirements caused by the independent control of each session. The problem of business transmission failure.
  • the actions of the SMF network element or the PCF network element 1 in the above steps S1101 to S1114 can be executed by the processor 501 in the communication device 500 shown in FIG. 5 calling the application program code stored in the memory 503, and this embodiment There are no restrictions.
  • the communication system shown in FIG. 1 is applied to the 5G network shown in FIG. 3.
  • the PCF network element serving the redundant session may be the same PCF network element, or Different PCF network elements (that is, the selection of PCF network elements is not restricted) can be taken as an example.
  • another policy control method provided by this embodiment of the application corresponds to the second policy control method in the redundant session.
  • the process of establishing two sessions includes the following steps:
  • S1201-S1202 are the same as steps S801-S802 in the embodiment shown in FIG. 8. For related description, please refer to the above steps S801-S802, which will not be repeated here.
  • the UDM network element sends message 3 to the SMF network element.
  • the SMF network element receives the message 3 from the UDM network element.
  • the message 3 includes the subscription information of the terminal device.
  • the UDM network element stores session 1 information associated with session 2.
  • the session 1 information may include, for example, the session identifier of session 1 and the corresponding session ID of session 1. DNN1 or S-NSSAI1.
  • the message 3 may be a subscription data acquisition response, for example.
  • the SMF network element determines that the established session 2 is a redundant session.
  • the SMF network element may determine that the established session 2 is a redundant session according to the DNN2 or S-NSSAI2 corresponding to the session 2 and the subscription information obtained from the UDM network element.
  • the SMF network element determines the PCF network element 2 serving session 2.
  • the SMF network element may determine the PCF network element 2 of the service session 2 according to an existing PCF network element selection method.
  • PCF network element 2 in the embodiment of this application and PCF network element 1 in the embodiment shown in FIG. 11 may be the same PCF network element or different PCF network elements. This is not specifically limited.
  • the SMF network element sends a message 4 to the UDM network element.
  • the UDM network element receives the message 4 from the SMF network element.
  • the message 4 includes the session identifier of session 2 and the DNN1 or S-NSSAI1 corresponding to session 2.
  • the message 4 may be a registration request, for example.
  • step S1206 may be executed at any time after step S1201, which will be explained here in a unified manner and will not be repeated hereafter.
  • the UDM network element sends message 5 to the SMF network element.
  • the SMF network element receives the message 5 from the UDM network element.
  • the message 5 may be a registration response, for example.
  • the SMF network element sends a message 6 to the PCF network element 2 serving session 2.
  • the PCF network element 2 receives the message 6 from the SMF network element.
  • the message 6 includes the information of session 2 and the information of associated session 1.
  • the message 6 may be an SM policy control creation request, for example.
  • the session 2 information may also include the RSN corresponding to session 2.
  • the RSN corresponding to session 2 may be set to 2, indicating that the second redundant session is established.
  • the RSN corresponding to session 2 may also be used to indicate that the access device of session 2 is the primary access device or the secondary access device, which is not specifically limited here.
  • the information associated with session 1 may include one or more of the session identifier of session 1, DNN1 or S-NSSAI1 corresponding to session 1, or RSN corresponding to session 1. Specific restrictions.
  • the PCF network element 2 determines that the policy rule 2 of the session 2 is not stored in the PCF network element 2 according to the information of the associated session 1, the PCF network element 2 obtains the contract information of the terminal device from the UDR network element.
  • the subscription information includes policy rule 1 of session 1.
  • PCF network element 2 may store the policy rule 2 of session 2 (corresponding to the implementation steps of the embodiment shown in FIG. 11 S1111 scenario), this embodiment of the present application does not specifically limit this.
  • the PCF network element 2 determines the policy rule 2 of the session 2.
  • the policy rule 2 includes QoS control information 2.
  • the QoS control information 2 is the QoS control information required by the session 2 to transmit the service when the session 1 and the session 2 are used to transmit the service.
  • the PCF network element 2 may generate the policy rule 2 of the session 2 according to the policy rule 1 of the session 1.
  • the PCF network element determines the policy rule 2 of session 2 based on the information associated with session 1. For example, the PCF network element determines the context of session 1 based on the information associated with session 1; the PCF network element obtains policy rule 2 from the context of session 1.
  • PCF network element 2 sends message 7 to the SMF network element serving session 2.
  • the SMF network element receives the message 7 from the PCF network element.
  • the message 7 includes the policy rule 2 of session 2.
  • the message 7 may be an SM policy control creation response, for example.
  • the SMF network element of service session 2 may be the same SMF network element of service session 1 in the embodiment shown in FIG. 7, or may be a different SMF network element. There is no specific limitation here.
  • the PCF network element since the PCF network element considers the factor that the session 2 is a redundant session when determining the policy rule 2 of the session 2, therefore, it guarantees the service by transmitting one service through two redundant sessions. Under the high-reliability scenario, it not only reduces the demand for network resources, but also avoids the problem of service transmission failure caused by unsatisfied service requirements caused by independent control of each session.
  • the actions of the SMF network element or the PCF network element 2 in the above steps S1201 to S1211 can be executed by the processor 501 in the communication device 500 shown in FIG. 5 calling the application program code stored in the memory 503, and this embodiment There are no restrictions.
  • the strategy control method corresponds to the strategy update process and includes the following steps:
  • the AF network element determines to call the service of the PCF network element.
  • the AF network element may obtain the PCF network element information from the BSF network element after determining that the service of the PCF network element needs to be invoked.
  • the information of the PCF network element serving two redundant sessions obtained by the AF network element from the BSF network element may be the information of one PCF network element or the information of two PCF network elements. If it is the information of a PCF network element, the subsequent process can refer to steps S601-S605 in the embodiment shown in FIG. 6, which will not be repeated here.
  • the following embodiments of the present application are described by taking as an example that the information of the PCF network element serving two redundant sessions acquired by the AF network element from the BSF network element is information of two PCF network elements.
  • the AF network element sends message 1 to the first PCF network element serving the first session.
  • the PCF network element receives message 1 from the AF network element.
  • the message 1 includes the first address of the terminal device corresponding to the first session, and application requirement information or service requirement information.
  • the message 1 may be, for example, a policy authorization creation message.
  • the first session here may be session 1 in FIG. 11, and the first PCF network element may be PCF network element 1 in FIG. 11; or, the first session may be session 2 in FIG. 12, the first PCF network element The element may be the PCF network element 2 in FIG. 12, which is not specifically limited here.
  • the first PCF network element determines the first policy rule of the first session corresponding to the first address and the second policy rule of the second session corresponding to the second address.
  • the first PCF network element determining the first policy rule of the first session corresponding to the first address and the second policy rule of the second session corresponding to the second address may include: PCF network element
  • the context of the first session can be determined according to the first address in message 1, and then the first session corresponding to the first address can be learned according to the context of the first session as a redundant session of the terminal device, and the PCF network element can be based on application information or The service information determines the first policy rule of the first session corresponding to the first address and the second policy rule of the second session associated with the first session.
  • the first PCF network element sends message 2 to the first SMF network element serving the first session.
  • the first SMF network element receives the message 2 from the first PCF network element.
  • the message 2 includes the first policy rule.
  • the message 2 may be an SM policy control update notification request message, for example.
  • the first SMF network element obtains the first policy rule of the first session, it can initiate the modification process of the first session.
  • the modification process of the first session please refer to the existing implementation manner, which will not be repeated here.
  • the first SMF network element sends message 3 to the first PCF network element.
  • the first PCF network element receives message 3 from the SMF network element.
  • the message 3 may be an SM policy control update notification response message, for example.
  • the first PCF network element sends message 4 to the UDR network element.
  • the UDR network element receives the message 4 from the first PCF network element.
  • the message 4 includes the second policy rule of the second session.
  • the message 4 may be a DM update request message, for example.
  • the UDR network element determines that the policy rule is updated, and sends a message 5 to the second PCF network element serving the second session.
  • the second PCF network element receives message 5 from the UDR network element.
  • the message 5 includes the second policy rule of the second session.
  • the message 5 may be a policy update request message 1, for example.
  • the second PCF network element here may be PCF network element 2 in FIG. 12; or, if the above-mentioned first PCF network element It may be the PCF network element 2 in FIG. 12, and the second PCF network element here may be the PCF network element 1 in FIG. 11, which is not specifically limited here.
  • the second PCF network element sends a message 6 to the second SMF network element serving the second session.
  • the second SMF network element receives the message 6 from the second PCF network element.
  • the message 6 includes the second policy rule of the second session.
  • the message 6 may be a policy update request message 2, for example.
  • the second SMF network element obtains the second policy rule of the second session, it can initiate the modification process of the second session.
  • the modification process of the second session please refer to the existing implementation manner, which will not be repeated here.
  • the second SMF network element sends a message 7 to the second PCF network element.
  • the second PCF network element receives the message 7 from the second SMF network element.
  • the message 7 may be a policy update response message 2, for example.
  • the second PCF network element sends a message 8 to the UDR network element.
  • the UDR network element receives the message 8 from the second PCF network element.
  • the message 8 may be a policy update response message 1, for example.
  • the first PCF network element considers the first and second sessions as redundant sessions when determining the first policy rule of the first session and the second policy rule of the second session Therefore, in the scenario where a service is transmitted through two redundant sessions to ensure high reliability of the service, it not only reduces the demand for network resources, but also avoids the service requirements that may be caused by independent control of each session. The problem of business transmission failure caused by satisfaction.
  • the actions of the first PCF network element or the AF network element in the above steps S1301 to S1310 may be executed by the processor 501 in the communication device 500 shown in FIG. 5 calling the application program code stored in the memory 503. This embodiment There are no restrictions on this.
  • the methods and/or steps implemented by the policy control network element can also be implemented by components that can be used in the policy control network element; the methods and/or steps implemented by the application function network element, It can also be implemented by components that can be used for application function network elements.
  • an embodiment of the present application also provides a communication device, which may be the policy control network element in the foregoing method embodiment, or a device including the foregoing policy control network element, or a component that can be used for the policy control network element;
  • the communication device may be the application function network element in the foregoing method embodiment, or a device containing the foregoing application function network element, or a component that can be used for the application function network element.
  • the communication device includes hardware structures and/or software modules corresponding to each function.
  • the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed by hardware or computer software-driven hardware depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.
  • the embodiments of the present application may divide the communication device into functional modules according to the foregoing method embodiments.
  • each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module.
  • the above-mentioned integrated modules can be implemented in the form of hardware or software functional modules. It should be noted that the division of modules in the embodiments of the present application is illustrative, and is only a logical function division, and there may be other division methods in actual implementation.
  • FIG. 14 shows a schematic structural diagram of a policy control network element 140.
  • the policy control network element 140 includes a transceiver module 1401 and a processing module 1402.
  • the transceiver module 1401 may also be referred to as a transceiver unit to implement a transceiver function, and may be, for example, a transceiver circuit, transceiver, transceiver, or communication interface.
  • the processing module 1402 is configured to learn that the first session is a redundant session; determine a first policy rule for the first session, where the first policy rule includes first QoS control information, and the first QoS control information is the first session transmission service The required QoS control information, the service is transmitted through at least two sessions, the at least two sessions include the first session, and the at least two sessions are redundant sessions associated with the terminal device; the transceiver module 1401 is used to transmit The first session management network element serving the first session sends the first policy rule.
  • the processing module 1402 configured to learn that the first session is a redundant session, includes: a processing module 1402.
  • the U disk receives the first session information from the first session management network element through the transceiver module 1401.
  • the session information includes first indication information, and the first indication information is used to indicate that the first session is a redundant session.
  • the at least two sessions further include a second session; the processing module 1402 is further configured to generate a second policy rule for the second session, the second policy rule includes second QoS control information, and the second QoS control information is the first
  • the second session transmits the QoS control information required by the service.
  • the first indication information includes first RSN information.
  • the first RSN information is also used to indicate that the access device of the first session is the primary access device or the secondary access device;
  • the processing module 1402, used to generate the first policy rule of the first session includes: the processing module 1402 , Used to generate the first policy rule of the first session according to the first indication information.
  • the at least two sessions further include a second session, the second session is the first redundant session of the terminal device, and the first session is the second redundant session of the terminal device;
  • the processing module 1402 is configured to learn One session is a redundant session, including: a processing module 1402, configured to receive information associated with the second session from the first session management network element through the transceiver module 1401; learn that the first session is redundant according to the information associated with the second session Conversation.
  • the processing module 1402 is configured to determine the first policy rule of the first session, and includes: a processing module 1402, configured to determine the context of the second session according to the information associated with the second session; and obtain from the context of the second session The first policy rule; or, obtain the second policy rule of the second session from the context of the second session, and generate the first policy rule according to the second policy rule, where the second policy rule includes second QoS control information, and The QoS control information is QoS control information required by the second session transmission service.
  • the at least two sessions further include a second session
  • the processing module 1402 is further configured to delete the first policy rule and update the second policy rule of the second session, where the second policy rule includes second QoS control information ,
  • the second QoS control information is the QoS control information required for the second session transmission service;
  • the updated second policy rule of the second session includes the third QoS control information, and the third QoS control information is only the second session transmission service QoS control information required by the time;
  • the transceiver module 1401 is also used to send the updated second policy rule to the second session management network element serving the second session.
  • the at least two sessions further include a second session
  • the processing module 1402 is further configured to delete the second policy rule of the second session and update the first policy rule.
  • the second policy rule includes second QoS control information. 2.
  • QoS control information is the QoS control information required for the second session transmission service;
  • the updated first policy rule includes fourth QoS control information, and the fourth QoS control information is the QoS control required when only the first session transmission service is used Information;
  • the transceiver module 1401 is also used to send the updated first policy rule to the first session management network element.
  • the at least two sessions further include a second session; the processing module 1402 is further configured to determine to delete the first policy rule or the second policy rule of the second session, and the second policy rule includes second QoS control information, 2.
  • the QoS control information is the QoS control information required for the second session transmission service; the processing module 1402 is also used to delete the first policy rule and the second policy rule; the transceiver module 1401 is also used to send to the first session management network element Second instruction information, the second instruction information is used to instruct to delete the first policy rule; and the transceiver module 1401 is also used to send third instruction information to the second session management network element serving the second session, and the third instruction information is used Instructed to delete the second policy rule.
  • the transceiver module 1401 is used to receive the first address of the terminal device from the application function network element; the processing module 1402 is used to determine the first policy rule of the first session and the second policy rule of the second session corresponding to the first address ,
  • the first policy rule includes first QoS control information
  • the second policy rule includes second QoS control information
  • the first QoS control information is the QoS control information required for the first session transmission service
  • the second QoS control information is the second session
  • the transceiver module 1401 is further configured to send the first policy rule to the first session management network element serving the first session
  • the transceiver module 1401 is further configured to send the second policy rule to the second session management network element serving the second session.
  • the transceiver module 1401 is configured to receive the first address of the terminal device from the application function network element, including: the transceiver module 1401 is configured to receive a first message from the application function network element, the first message including the first address The second address of the terminal device corresponding to the second session.
  • the transceiver module 1401 is configured to receive the first address of the terminal device from the application function network element, including: the transceiver module 1401 is configured to receive a second message from the application function network element, the second message includes the first address One address.
  • the processing module 1402 is further configured to learn that the first session corresponding to the first address is a redundant session.
  • the transceiver module 1401 is further configured to receive a third message from the application function network element, where the third message includes the second address of the terminal device corresponding to the second session.
  • the processing module 1402 is further configured to learn that the first session corresponding to the first address and the second session corresponding to the second address are redundant sessions associated with the terminal device.
  • the policy control network element 140 is presented in the form of dividing various functional modules in an integrated manner.
  • the "module” here can refer to a specific ASIC, circuit, processor and memory that executes one or more software or firmware programs, integrated logic circuit, and/or other devices that can provide the above-mentioned functions.
  • the policy control network element 140 may take the form of the communication device 500 shown in FIG. 5.
  • the processor 501 in the communication device 500 shown in FIG. 5 may invoke the computer execution instructions stored in the memory 503 to make the communication device 500 execute the policy control method in the foregoing method embodiment.
  • the functions/implementation process of the transceiver module 1401 and the processing module 1402 in FIG. 14 may be implemented by the processor 501 in the communication device 500 shown in FIG. 5 calling the computer execution instructions stored in the memory 503.
  • the function/implementation process of the processing module 1402 in FIG. 14 can be implemented by the processor 501 in the communication device 500 shown in FIG. 5 calling the computer execution instructions stored in the memory 503, and the function of the transceiver module 1401 in FIG.
  • the implementation process can be implemented through the communication interface 504 in the communication device 500 shown in FIG. 5.
  • the policy control network element 140 provided in this embodiment can execute the above-mentioned policy control method, the technical effects that can be obtained can refer to the above-mentioned method embodiment, which will not be repeated here.
  • FIG. 15 shows a schematic structural diagram of an application function network element 150.
  • the application function network element 150 includes a transceiver module 1501 and a processing module 1502.
  • the transceiver module 1501 may also be referred to as a transceiver unit to implement a transceiver function, for example, it may be a transceiver circuit, a transceiver, a transceiver or a communication interface.
  • the processing module 1502 is configured to obtain at least one of the first address of the terminal device or the second address of the terminal device; wherein, the first session corresponding to the first address and the second session corresponding to the second address are associated with the terminal device Redundant session; transceiver module 1501, used to send at least one of the first address or the second address to the policy control network element.
  • At least one of the first address or the second address is used to determine the first policy rule of the first session and the second policy rule of the second session, the first policy rule includes the first QoS control information, and the second policy The rule includes second QoS control information, the first QoS control information is QoS control information required for the first session to transmit the service, and the second QoS control information is QoS control information required for the second session to transmit the service.
  • the application function network element 150 is presented in the form of dividing various functional modules in an integrated manner.
  • the "module” here can refer to a specific ASIC, circuit, processor and memory that executes one or more software or firmware programs, integrated logic circuit, and/or other devices that can provide the above-mentioned functions.
  • the application function network element 150 may take the form of the communication device 500 shown in FIG. 5.
  • the processor 501 in the communication device 500 shown in FIG. 5 may invoke the computer execution instructions stored in the memory 503 to make the communication device 500 execute the policy control method in the foregoing method embodiment.
  • the functions/implementation process of the transceiver module 1501 and the processing module 1502 in FIG. 15 may be implemented by the processor 501 in the communication device 500 shown in FIG. 5 calling the computer execution instructions stored in the memory 503.
  • the function/implementation process of the processing module 1502 in FIG. 15 can be implemented by the processor 501 in the communication device 500 shown in FIG. 5 calling a computer execution instruction stored in the memory 503, and the function of the transceiver module 1501 in FIG.
  • the implementation process can be implemented through the communication interface 504 in the communication device 500 shown in FIG. 5.
  • the application function network element 150 provided in this embodiment can execute the above-mentioned policy control method, the technical effects that can be obtained can refer to the above-mentioned method embodiment, which will not be repeated here.
  • one or more of the above modules or units can be implemented by software, hardware or a combination of both.
  • the software exists in the form of computer program instructions and is stored in the memory, and the processor can be used to execute the program instructions and implement the above method flow.
  • the processor can be built in SoC (system on chip) or ASIC, or it can be an independent semiconductor chip.
  • SoC system on chip
  • ASIC application specific integrated circuit
  • the processor's internal processing is used to execute software instructions for calculations or processing, and may further include necessary hardware accelerators, such as field programmable gate array (FPGA), PLD (programmable logic device) , Or a logic circuit that implements dedicated logic operations.
  • FPGA field programmable gate array
  • PLD programmable logic device
  • the hardware can be CPU, microprocessor, digital signal processing (digital signal processing, DSP) chip, microcontroller unit (MCU), artificial intelligence processor, ASIC, Any one or any combination of SoC, FPGA, PLD, dedicated digital circuit, hardware accelerator, or non-integrated discrete device can run necessary software or do not rely on software to perform the above method flow.
  • DSP digital signal processing
  • MCU microcontroller unit
  • ASIC artificial intelligence processor
  • an embodiment of the present application further provides a communication device (for example, the communication device may be a chip or a chip system), and the communication device includes a processor for implementing the method in any of the foregoing method embodiments.
  • the communication device further includes a memory.
  • the memory is used to store necessary program instructions and data, and the processor can call the program code stored in the memory to instruct the communication device to execute the method in any of the foregoing method embodiments.
  • the memory may not be in the communication device.
  • the communication device is a chip system, it may be composed of a chip, or may include a chip and other discrete devices, which is not specifically limited in the embodiment of the present application.
  • the computer may be implemented in whole or in part by software, hardware, firmware or any combination thereof.
  • a software program it may be implemented in the form of a computer program product in whole or in part.
  • the computer program product includes one or more computer instructions.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices.
  • the computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium.
  • the computer instructions may be transmitted from a website, computer, server, or data center.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer, or may include one or more data storage devices such as servers and data centers that can be integrated with the medium.
  • the usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state disk (SSD)).

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Abstract

本申请实施例提供策略控制方法、设备及系统，在通过两个冗余会话传输一个业务来保证业务的高可靠性的场景下，可以降低对网络资源的需求。方法包括：策略控制网元获知第一会话为冗余会话；所述策略控制网元确定所述第一会话的第一策略规则，其中，所述第一策略规则包括第一服务质量QoS控制信息，所述第一QoS控制信息为所述第一会话传输业务所需要的QoS控制信息，所述业务是通过至少两个会话来传输的，所述至少两个会话包括所述第一会话，所述至少两个会话为终端设备关联的冗余会话；所述策略控制网元向服务所述第一会话的第一会话管理网元发送所述第一策略规则。

Description

策略控制方法、设备及系统
本申请要求于2019年03月30日提交国家知识产权局、申请号为201910254003.0、申请名称为“策略控制方法、设备及系统”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信技术领域，尤其涉及策略控制方法、设备及系统。
背景技术
为了应对无线宽带技术的挑战，保持第三代合作伙伴计划(3rd generation partnership project，3GPP)网络的领先优势，3GPP标准组在2016年底制定了下一代移动通信系统(next generation system)网络架构，称为第五代(5rd generation，5G)网络架构。5G网络架构中定义了极高可靠性低时延通信(ultra-reliable low latency communication，URLLC)场景，主要包括如无人驾驶、工业自动化等需要低时延、高可靠连接的业务。
其中，现有的分组数据单元(packet data unit，PDU)会话建立过程中或者PDU会话过程中，策略控制功能(policy control function，PCF)网元为PDU会话确定策略时仅考虑当前PDU会话的相关信息，即每个PDU会话的策略控制是独立执行。但是，在上述URLLC的业务传输过程中，为了支持高可靠传输，需要建立两个冗余PDU会话，即通过两个PDU会话传输一个业务来保证业务的高可靠性。该场景下，若仍采用现有的PDU会话的策略控制，则PCF网元需要确定一个策略来使得单个PDU会话来支持业务的高可靠性，对网络资源的需求更加严格。此外，每个PDU会话的独立控制可能会导致业务需求不能满足而造成业务传输失败。
发明内容
本申请实施例提供策略控制方法、设备及系统，在通过两个冗余会话传输一个业务来保证业务的高可靠性的场景下，可以降低对网络资源的需求。
为达到上述目的，本申请的实施例采用如下技术方案：
第一方面，提供了一种策略控制方法，该方法包括：策略控制网元获知第一会话为冗余会话；策略控制网元确定该第一会话的第一策略规则，其中，该第一策略规则包括第一服务质量QoS控制信息，该第一QoS控制信息为该第一会话传输业务所需要的QoS控制信息，该业务是通过至少两个会话来传输的，该至少两个会话包括该第一会话，该至少两个会话为终端设备关联的冗余会话；策略控制网元向服务该第一会话的第一会话管理网元发送该第一策略规则。基于该方案，由于策略控制网元确定的第一QoS控制信息为第一会话传输业务所需要的QoS控制信息，该业务是通过至少两个会话来传输的，该至少两个会话为包括第一会话的终端设备关联的冗余会话。也就是说，策略控制网元在确定第一会话的第一策略规则时考虑了第一会话为冗余会话的因素。因此，在通过两个冗余会话传输一个业务来保证业务的高可靠性的场景下，不仅降低了对网络资源的需求，且可以避免每个会话的独立控制可能导致的业务需求不能 满足而造成业务传输失败的问题。
可选的，本申请实施例中，第一QoS控制信息为第一会话传输业务所需要的QoS控制信息，该业务是通过至少两个会话来传输的，也可以描述为第一QoS控制信息为通过至少两个会话来传输业务时第一会话传输业务所需要的QoS控制信息，在此统一说明，以下不再赘述。
在一种可能的设计中，策略控制网元获知第一会话为冗余会话，包括：策略控制网元接收来自该第一会话管理网元的第一会话的信息，该第一会话的信息包括第一指示信息，该第一指示信息用于指示该第一会话为冗余会话。也就是说，在建立第一个冗余会话时，策略控制网元可以根据第一会话的信息中包括的第一指示信息获知第一会话为冗余会话。
在一种可能的设计中，至少两个会话还包括第二会话，该方法还包括：策略控制网元生成该第二会话的第二策略规则，该第二策略规则中包括第二QoS控制信息，该第二QoS控制信息为该第二会话传输该业务所需要的QoS控制信息。也就是说，在建立第一个冗余会话时，可以由策略控制网元在生成第一会话的第一策略规则的同时，生成第二会话的第二策略规则。
可选的，本申请实施例中，第二QoS控制信息为第二会话传输业务所需要的QoS控制信息，该业务是通过至少两个会话来传输的，也可以描述为第二QoS控制信息为通过至少两个会话来传输业务时第二会话传输业务所需要的QoS控制信息，在此统一说明，以下不再赘述。
可以理解，本申请实施例中的第一策略规则和第二策略规则是协同的策略规则，在此统一说明，以下不再赘述。
在一种可能的设计中，该第一指示信息包括第一冗余序列号RSN信息。
在一种可能的设计中，该第一RSN信息还用于指示该第一会话的接入设备为主接入设备或辅接入设备；策略控制网元生成该第一会话的该第一策略规则，包括：策略控制网元根据该第一指示信息，生成该第一会话的该第一策略规则。比如，若策略控制网元确定第一会话使用主接入设备进行用户面传输，则第一会话的第一策略规则为使用主接入设备传输时的策略规则；或者，若策略控制网元确定第一会话使用辅接入设备进行用户面传输，则第一会话的第一策略规则为使用辅接入设备传输时的策略规则。
在一种可能的设计中，至少两个会话还包括第二会话，该第二会话为该终端设备的第一个冗余会话，该第一会话为所述终端设备的第二个冗余会话；策略控制网元获知第一会话为冗余会话，包括：策略控制网元接收来自该第一会话管理网元的关联该第二会话的信息；策略控制网元根据该关联该第二会话的信息，获知第一会话为冗余会话。也就是说，在建立第二个冗余会话时，策略控制网元可以根据该关联该第二会话的信息，获知第一会话为冗余会话。
在一种可能的设计中，策略控制网元确定该第一会话的第一策略规则，包括：策略控制网元根据该关联该第二会话的信息，确定该第二会话的上下文；策略控制网元从该第二会话的上下文中获取该第一策略规则；或者，该策略控制网元从该第二会话的上下文中获取该第二会话的第二策略规则，该策略控制网元根据该第二策略规则生 成该第一策略规则，其中，该第二策略规则包括第二QoS控制信息，该第二QoS控制信息为该第二会话传输该业务所需要的QoS控制信息。也就是说，本申请实施例中，可以在建立第一个冗余会话时，为第二个冗余会话生成相应的策略规则；也可以是在建立第二个冗余会话时，根据第一个冗余会话的策略规则生成第二个冗余会话的策略规则。
在一种可能的设计中，该关联该第二会话的信息中包括第一RSN信息。
在一种可能的设计中，所述至少两个会话还包括第二会话，该方法还包括：策略控制网元删除该第一策略规则，以及更新该第二会话的第二策略规则，其中，该第二策略规则包括第二QoS控制信息，该第二QoS控制信息为该第二会话传输该业务所需要的QoS控制信息；更新后的该第二会话的第二策略规则包括第三QoS控制信息，该第三QoS控制信息为仅使用该第二会话传输该业务时所需要的QoS控制信息；策略控制网元向服务该第二会话的第二会话管理网元发送更新后的该第二策略规则。基于该方案，策略控制网元可以实时为终端设备的会话确定合适的策略规则。
在一种可能的设计中，所述至少两个会话还包括第二会话，该方法还包括：策略控制网元删除该第二会话的第二策略规则，以及更新该第一策略规则，该第二策略规则包括第二QoS控制信息，该第二QoS控制信息为该第二会话传输该业务所需要的QoS控制信息；更新后的该第一策略规则包括第四QoS控制信息，该第四QoS控制信息为仅使用该第一会话传输该业务时所需要的QoS控制信息；策略控制网元向该第一会话管理网元发送更新后的该第一策略规则。基于该方案，策略控制网元可以实时为终端设备的会话确定合适的策略规则。
在一种可能的设计中，所述至少两个会话还包括第二会话，该方法还包括：策略控制网元确定删除该第一策略规则或该第二会话的第二策略规则，该第二策略规则中包括第二QoS控制信息，该第二QoS控制信息为该第二会话传输该业务所需要的QoS控制信息；策略控制网元删除该第一策略规则和该第二策略规则；策略控制网元向该第一会话管理网元发送第二指示信息，该第二指示信息用于指示删除该第一策略规则；以及，该策略控制网元向服务该第二会话的第二会话管理网元发送第三指示信息，该第三指示信息用于指示删除该第二策略规则。也就是说，本申请实施例中，考虑到为冗余会话建立的策略规则为协同的策略规则，因此若策略控制网元确定删除其中一个冗余会话，策略控制网元可以将两个冗余会话的策略规则都删除，从而避免了未删除的策略规则不能满足会话的业务需求而造成业务传输失败的问题。
第二方面，提供了一种策略控制方法，该方法包括：策略控制网元接收来自应用功能网元的终端设备的第一地址；策略控制网元确定该第一地址对应的第一会话的第一策略规则和第二会话的第二策略规则，该第一策略规则包括第一QoS控制信息，该第二策略规则包括第二QoS控制信息，该第一QoS控制信息为该第一会话传输业务所需要的QoS控制信息，该第二QoS控制信息为该第二会话传输该业务所需要的QoS控制信息，第一会话与第二会话为该终端设备关联的冗余会话；策略控制网元向服务该第一会话的第一会话管理网元发送该第一策略规则；以及，该策略控制网元向服务该第二会话的第二会话管理网元发送该第二策略规则。基于该方案，由于策略控制网元在确定第一会话的第一策略规则和第二会话的第二策略规则时考虑了第一会话和第 二会话为冗余会话的因素，因此，在通过两个冗余会话传输一个业务来保证业务的高可靠性的场景下，不仅降低了对网络资源的需求，且可以避免每个会话的独立控制可能导致的业务需求不能满足而造成业务传输失败的问题。
第三方面，提供了一种策略控制方法，该方法包括：策略控制网元接收来自应用功能网元的终端设备的第一地址；策略控制网元确定该第一地址对应的第一会话和第二会话的策略规则，该策略规则包括QoS控制信息，该QoS控制信息为使用第一会话和第二会话传输业务时所需要的QoS控制信息，第一会话与第二会话为该终端设备关联的冗余会话；策略控制网元向该第一会话对应的第一会话管理网元和该第二会话对应的第二会话管理网元发送该策略规则。基于该方案，由于策略控制网元在确定第一会话和第二会话的策略规则时考虑了第一会话和第二会话为冗余会话的因素，因此，在通过两个冗余会话传输一个业务来保证业务的高可靠性的场景下，不仅降低了对网络资源的需求，且可以避免每个会话的独立控制可能导致的业务需求不能满足而造成业务传输失败的问题。
结合上述第二方面或第三方面，在一种可能的设计中，策略控制网元接收来自应用功能网元的终端设备的第一地址，包括：策略控制网元接收来自应用功能网元的第一消息，该第一消息包括该第一地址和第二会话对应的该终端设备的第二地址。也就是说，本申请实施例中可以通过一个消息承载第一地址和第二地址。
结合上述第二方面或第三方面，在一种可能的设计中，策略控制网元接收来自应用功能网元的终端设备的第一地址，包括：策略控制网元接收来自应用功能网元的第二消息，该第二消息包括该第一地址。也就是说，第一地址可以通过一个单独的消息进行发送。
结合上述第二方面或第三方面，在一种可能的设计中，该方法还包括：策略控制网元获知该第一地址对应的第一会话为冗余会话。
结合上述第二方面或第三方面，在一种可能的设计中，该方法还包括：策略控制网元接收来自应用功能网元的第三消息，该第三消息包括该第二会话对应的该终端设备的第二地址。
结合上述第二方面或第三方面，在一种可能的设计中，该方法还包括：策略控制网元获知该第一地址对应的该第一会话和该第二地址对应的该第二会话为该终端设备关联的冗余会话。也就是说，在通过不同消息分别承载第一地址和第二地址时，策略控制网元可以根据第一地址和第二地址确定第一地址对应的第一会话和第二地址对应的第二会话为该终端设备关联的冗余会话。
第四方面，提供了一种策略控制方法，该方法包括：应用功能网元获取终端设备的第一地址或该终端设备的第二地址中的至少一个；其中，该第一地址对应的第一会话和该第二地址对应的第二会话为该终端设备关联的冗余会话；应用功能网元向策略控制网元发送该第一地址或该第二地址中的至少一个。
在一种可能的设计中，该第一地址或该第二地址中的至少一个用于确定该第一会话的第一策略规则和该第二会话的第二策略规则，该第一策略规则包括第一QoS控制信息，该第二策略规则包括第二QoS控制信息，该第一QoS控制信息为该第一会话传输业务所需要的QoS控制信息，该第二QoS控制信息为该第二会话传输该业务所需要 的QoS控制信息。基于该方案，由于策略控制网元在确定第一会话和第二会话的策略规则时考虑了第一会话和第二会话为冗余会话的因素，因此，在通过两个冗余会话传输一个业务来保证业务的高可靠性的场景下，不仅降低了对网络资源的需求，且可以避免每个会话的独立控制可能导致的业务需求不能满足而造成业务传输失败的问题。
在一种可能的设计中，该第一地址或该第二地址中的至少一个包括该第一地址和该第二地址；应用功能网元向策略控制网元发送该第一地址或该第二地址中的至少一个，包括：应用功能网元向策略控制网元发送第一消息，该第一消息包括该第一地址和该第二地址。也就是说，本申请实施例中可以通过一个消息承载第一地址和第二地址。
在一种可能的设计中，该第一地址或该第二地址中的至少一个包括该第一地址和该第二地址；应用功能网元向策略控制网元发送该第一地址或该第二地址中的至少一个，包括：应用功能网元向策略控制网元发送第二消息和第三消息，该第二消息包括该第一地址，该第三消息包括该第二地址。也就是说，本申请实施例中可以通过不同消息分别承载第一地址和第二地址。
第五方面，提供了一种策略控制方法，该方法包括：会话管理网元确定正在建立的会话为第二个冗余会话；会话管理网元将为第一个冗余会话服务的策略控制网元确定为为第二个冗余会话服务的策略控制网元。基于该方案，可以使得冗余会话建立的过程中，服务冗余会话的策略控制网元为同一个策略控制网元。
第六方面，提供了一种通信装置用于实现上述各种方法。该通信装置可以为上述第一方面或第二方面或第三方面中的策略控制网元，或者包含上述策略控制网元的装置；或者，该通信装置可以为上述第四方面中的应用功能网元，或者包含上述应用功能网元的装置；或者，该通信装置可以为上述第五方面中的会话管理网元，或者包含上述会话管理网元的装置。所述通信装置包括实现上述方法相应的模块、单元、或手段(means),该模块、单元、或means可以通过硬件实现，软件实现，或者通过硬件执行相应的软件实现。该硬件或软件包括一个或多个与上述功能相对应的模块或单元。
第七方面，提供了一种通信装置，包括：处理器和存储器；该存储器用于存储计算机指令，当该处理器执行该指令时，以使该通信装置执行上述第一方面至第五方面中任一方面所述的方法。该通信装置可以为上述第一方面或第二方面或第三方面中的策略控制网元，或者包含上述策略控制网元的装置；或者，该通信装置可以为上述第四方面中的应用功能网元，或者包含上述应用功能网元的装置；或者，该通信装置可以为上述第五方面中的会话管理网元，或者包含上述会话管理网元的装置。
第八方面，提供了一种通信装置，包括：处理器；所述处理器用于与存储器耦合，并读取存储器中的指令之后，根据所述指令执行如上述第一方面至第五方面中任一方面所述的方法。该通信装置可以为上述第一方面或第二方面或第三方面中的策略控制网元，或者包含上述策略控制网元的装置；或者，该通信装置可以为上述第四方面中的应用功能网元，或者包含上述应用功能网元的装置；或者，该通信装置可以为上述第五方面中的会话管理网元，或者包含上述会话管理网元的装置。
第九方面，提供了一种计算机可读存储介质，该计算机可读存储介质中存储有指令，当其在计算机上运行时，使得计算机可以执行上述第一方面至第五方面中任一方 面所述的方法。
第十方面，提供了一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机可以执行上述上述第一方面至第五方面中任意方面所述的方法。
第十一方面，提供了一种通信装置(例如，该通信装置可以是芯片或芯片系统)，该通信装置包括处理器，用于实现上述上述第一方面至第五方面中任一方面中所涉及的功能。在一种可能的设计中，该通信装置还包括存储器，该存储器，用于保存必要的程序指令和数据。该通信装置是芯片系统时，可以由芯片构成，也可以包含芯片和其他分立器件。
其中，第六方面至第十一方面中任一种设计方式所带来的技术效果可参见上述第一方面至第五方面中不同设计方式所带来的技术效果，此处不再赘述。
第十二方面，提供了一种通信系统，该通信系统包括策略控制网元和服务第一会话的第一会话管理网元。其中，策略控制网元，用于获知第一会话为冗余会话之后，确定第一会话的第一策略规则，其中，该第一策略规则包括第一服务质量QoS控制信息，该第一QoS控制信息为该第一会话传输业务所需要的QoS控制信息，该业务是通过至少两个会话来传输的，该至少两个会话包括该第一会话，该至少两个会话为终端设备关联的冗余会话；策略控制网元，还用于向服务该第一会话的第一会话管理网元发送该第一策略规则。第一会话管理网元，用于接收来自策略控制网元的第一策略规则。其中，第十二方面的技术效果可参考上述第一方面，在此不再赘述。
第十三方面，提供了一种通信系统，该通信系统包括策略控制网元和应用功能网元；应用功能网元，用于获取终端设备的第一地址；应用功能网元，还用于向策略控制网元发送该第一地址。策略控制网元，用于接收来自应用功能网元的该第一地址；策略控制网元，还用于确定该第一地址对应的第一会话的第一策略规则和第二地址对应的第二会话的第二策略规则，该第一策略规则包括第一服务质量QoS控制信息，该第二策略规则包括第二QoS控制信息，该第一QoS控制信息为该第一会话传输业务所需要的QoS控制信息，该第二QoS控制信息为该第二会话传输该业务所需要的QoS控制信息,第一会话与第二会话为该终端设备关联的冗余会话；策略控制网元，还用于向服务该第一会话的第一会话管理网元发送该第一策略规则；以及，该策略控制网元，还用于向服务该第二会话的第二会话管理网元发送该第二策略规则。其中，第十三方面的技术效果可参考上述第二方面，在此不再赘述。
附图说明
图1为本申请实施例提供的通信系统的结构示意图一；
图2为本申请实施例提供的通信系统的结构示意图二；
图3为本申请实施例提供的通信系统在5G网络中的应用示意图一；
图4为本申请实施例提供的通信系统在5G网络中的应用示意图二；
图5为本申请实施例提供的通信设备的结构示意图；
图6为本申请实施例提供的策略控制方法流程示意图一；
图7为本申请实施例提供的策略控制方法流程示意图二；
图8为本申请实施例提供的策略控制方法流程示意图三；
图9为本申请实施例提供的策略控制方法流程示意图四；
图10为本申请实施例提供的策略控制方法流程示意图五；
图11为本申请实施例提供的策略控制方法流程示意图六；
图12为本申请实施例提供的策略控制方法流程示意图七；
图13为本申请实施例提供的策略控制方法流程示意图八；
图14为本申请实施例提供的策略控制网元的结构示意图；
图15为本申请实施例提供的应用功能网元的结构示意图。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行描述。其中，在本申请的描述中，除非另有说明，“/”表示前后关联的对象是一种“或”的关系，例如，A/B可以表示A或B；本申请中的“和/或”仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况，其中A,B可以是单数或者复数。并且，在本申请的描述中，除非另有说明，“多个”是指两个或多于两个。“以下至少一项(个)”或其类似表达，是指的这些项中的任意组合，包括单项(个)或复数项(个)的任意组合。例如，a，b，或c中的至少一项(个)，可以表示：a，b，c，a-b，a-c，b-c，或a-b-c，其中a，b，c可以是单个，也可以是多个。另外，为了便于清楚描述本申请实施例的技术方案，在本申请的实施例中，采用了“第一”、“第二”等字样对功能和作用基本相同的相同项或相似项进行区分。本领域技术人员可以理解“第一”、“第二”等字样并不对数量和执行次序进行限定，并且“第一”、“第二”等字样也并不限定一定不同。
此外，本申请实施例描述的网络架构以及业务场景是为了更加清楚的说明本申请实施例的技术方案，并不构成对于本申请实施例提供的技术方案的限定，本领域普通技术人员可知，随着网络架构的演变和新业务场景的出现，本申请实施例提供的技术方案对于类似的技术问题，同样适用。
如图1所示，为本申请实施例提供的一种通信系统10，该通信系统10包括策略控制网元101和第一会话管理网元102。该策略控制网元101和该第一会话管理网元102可以直接通信，也可以通过其他设备的转发进行通信，本申请实施例对此不作具体限定。
其中，策略控制网元101，用于获知第一会话为冗余会话之后，确定该第一会话的第一策略规则，其中，第一策略规则包括第一服务质量(quality of service，QoS)控制信息，该第一QoS控制信息为第一会话传输业务所需要的QoS控制信息，该业务是通过至少两个会话来传输的，该至少两个会话包括该第一会话，该至少两个会话为终端设备关联的冗余会话。策略控制网元101，还用于向服务第一会话的第一会话管理网元102发送第一策略规则。第一会话管理网元102，用于接收来自策略控制网元101的第一策略规则。其中，上述方案的具体实现将在后续方法实施例中详细阐述，在此不予赘述。
可选的，本申请实施例中的第一会话可以是冗余会话中的第一个建立的会话，也可以是冗余会话中第二个建立的会话，本申请实施例对此不作具体限定。
可选的，本申请实施例中，使用第一会话和第二会话传输业务，即对同一个数据，复制一份，在两个会话上分别传输。也就是说，每个数据包传输两份，在此统一说明， 以下不再赘述。
基于该通信系统，由于策略控制网元确定的第一QoS控制信息为第一会话传输业务所需要的QoS控制信息，该业务是通过至少两个会话来传输的，该至少两个会话为包括第一会话的终端设备关联的冗余会话。也就是说，策略控制网元在确定第一会话的第一策略规则时考虑了第一会话为冗余会话的因素。因此，在通过两个冗余会话传输一个业务来保证业务的高可靠性的场景下，不仅降低了对网络资源的需求，且可以避免每个会话的独立控制可能导致的业务需求不能满足而造成业务传输失败的问题。
可选的，如图2所示，为本申请实施例提供的另一种通信系统20，该通信系统20包括策略控制网元201、应用功能网元202、第一会话管理网元203和第二会话管理网元204。该策略控制网元201和该应用功能网元202可以直接通信，也可以通过其他设备的转发进行通信，本申请实施例对此不作具体限定。该策略控制网元201和第一会话管理网元203或第二会话管理网元204可以直接通信，也可以通过其他设备的转发进行通信，本申请实施例对此不作具体限定。
其中，应用功能网元202，用于向策略控制网元201发送终端设备的第一地址。策略控制网元201，用于接收来自应用功能网元202的终端设备的第一地址；策略控制网元201，还用于确定该第一地址对应的第一会话的第一策略规则和第二会话的第二策略规则，第一策略规则包括第一QoS控制信息，第二策略规则包括第二QoS控制信息，第一QoS控制信息为第一会话传输业务所需要的QoS控制信息，第二QoS控制信息为第二会话传输业务所需要的QoS控制信息，第一会话与第二会话为终端设备关联的冗余会话。策略控制网元201，还用于向服务第一会话的第一会话管理网元203发送第一策略规则；以及，策略控制网元201，还用于向服务第二会话的第二会话管理网元204发送第二策略规则。第一会话管理网元203，用于接收来自策略控制网元201的第一策略规则。第二会话管理网元204，用于接收来自策略控制网元201的第二策略规则。其中，上述方案的具体实现将在后续方法实施例中详细阐述，在此不予赘述。
可选的，本申请实施例中的第一会话可以是冗余会话中的第一个建立的会话，也可以是冗余会话中第二个建立的会话，本申请实施例对此不作具体限定。
可选的，本申请实施例中的第一会话管理网元203和第二会话管理网元204可以是同一个会话管理网元，也可以是不同的会话管理网元，本申请实施例对此不作具体限定。
基于该通信系统，由于策略控制网元在确定第一会话的第一策略规则和第二会话的第二策略规则时考虑了第一会话和第二会话为冗余会话的因素，因此，在通过两个冗余会话传输一个业务来保证业务的高可靠性的场景下，不仅降低了对网络资源的需求，且可以避免每个会话的独立控制可能导致的业务需求不能满足而造成业务传输失败的问题。
可选的，图1所示的通信系统10或图2所示的通信系统20可以应用于目前正在讨论的5G网络或者未来的其他网络等，本申请实施例对此不作具体限定。
假设图1所示的通信系统10或图2所示的通信系统20应用于目前正在讨论的5G网络，示例性的，对于第一会话管理网元和第二会话管理网元为同一个会话管理网元 的场景，则如图3所示，上述的第一会话管理网元或第二会话管理网元所对应的网元或者实体可以为该5G网络中的会话管理功能(session management function，SMF)网元，上述的策略控制网元所对应的网元或者实体可以为该5G网络中的PCF网元，上述的应用功能网元所对应的网元或者实体可以为该5G网络中的应用功能(application function，AF)网元。
此外，如图3所示，该5G网络中还可以包括主接入设备、用户面功能(user Plane function，UPF)网元1、辅接入设备、UPF网元2、接入和移动性管理功能(access and mobility management function，AMF)网元、统一数据管理(unified data management，UDM)网元和统一数据库(unified data repository，UDR)网元等，在此不作具体限定。
其中，如图3所示，终端设备分别连接至主接入设备和辅接入设备。主接入设备通过下一代网络(next generation，N)3接口(简称N3)与UPF网元1通信，辅接入设备通过N3与UPF网元2通信。UPF网元1和UPF网元2分别通过N6接口(简称N6)与数据网络(data network，DN)通信。此外，主接入设备通过Xn接口(简称Xn)与辅接入设备通信，主接入设备通过N2接口(简称N2)与AMF网元通信，UPF网元1和UPF网元2分别通过N4接口(简称N4)与SMF网元通信。AMF网元、SMF网元、PCF网元、UDM网元或者UDR网元、AF网元等控制面网元采用服务化接口进行交互。比如，AMF网元对外提供的服务化接口可以为Namf；SMF网元对外提供的服务化接口可以为Nsmf；PCF网元对外提供的服务化接口可以为Npcf；UDM网元对外提供的服务化接口可以为Nudm；UDR网元对外提供的服务化接口可以为Nudr；AF网元对外提供的服务化接口可以为Naf。相关描述可以参考23501标准中的5G系统架构(5G system architecture)图，在此不予赘述。
其中，图3以终端设备建立两个会话，以实现终端设备到DN之间的端到端的高可靠传输。这两个会话由一个SMF网元控制。从用户面看，其中一个会话(以下称为会话1)对应的用户面连接为：终端设备—主接入设备—UPF网元1—DN；另一个会话(以下称为会话2)对应的用户面连接为：终端设备—辅接入设备—UPF网元2—DN。两个会话为冗余会话，传输相同的业务报文，由端点(即终端设备或DN进行报文去重、复制)。从控制面看，通过终端设备、主接入设备、AMF网元和SMF网元之间的信令交互建立会话1；通过终端设备、主接入设备、AMF网元和SMF网元之间的信令交互建立会话2。
或者，假设图1所示的通信系统10或图2所示的通信系统20应用于目前正在讨论的5G网络，示例性的，对于第一会话管理网元和第二会话管理网元不是同一个会话管理网元的场景，则如图4所示，上述的第一会话管理网元所对应的网元或者实体可以为该5G网络中的SMF网元1，上述的第二会话管理网元所对应的网元或者实体可以为该5G网络中的SMF网元2，上述的策略控制网元所对应的网元或者实体可以为该5G网络中的PCF网元，上述的应用功能网元所对应的网元或者实体可以为该5G网络中的AF网元。
此外，如图4所示，该5G网络中还可以包括主接入设备、UPF网元1、辅接入设备、UPF网元2、AMF网元、UDM网元和UDR网元等，在此不作具体限定。
其中，如图4所示，终端设备分别连接至主接入设备和辅接入设备。主接入设备 通过N3与UPF网元1通信，辅接入设备通过N3与UPF网元2通信。UPF网元1和UPF网元2分别通过N6与DN通信。此外，主接入设备通过Xn与辅接入设备通信，主接入设备通过N2与AMF网元通信，UPF网元1通过N4与SMF网元1通信，UPF网元2通过N4与SMF网元2通信。AMF网元、SMF网元1、SMF网元2、PCF网元、UDM网元或者UDR网元等控制面网元采用服务化接口进行交互。比如，AMF网元对外提供的服务化接口可以为Namf；SMF网元1和SMF网元2对外提供的服务化接口可以为Nsmf；PCF网元对外提供的服务化接口可以为Npcf；UDM网元对外提供的服务化接口可以为Nudm；UDR网元对外提供的服务化接口可以为Nudr；AF网元对外提供的服务化接口可以为Naf。相关描述可以参考23501标准中的5G系统架构图，在此不予赘述。
其中，图4以终端设备建立两个会话，以实现终端设备到DN之间的端到端的高可靠传输。该两个会话分别由两个SMF网元控制。从用户面看，其中一个会话(以下称为PDU会话1)对应的用户面连接为：终端设备—主接入设备—UPF网元1—DN；另一个会话(以下称为会话2)对应的用户面连接为：终端设备—辅接入设备—UPF网元2—DN。两个会话为冗余会话，传输相同的业务报文，由端点(即终端设备或DN进行报文去重、复制)。从控制面看，通过终端设备、主接入设备、AMF和SMF网元1之间的信令交互建立会话1；通过终端设备、主接入设备、AMF网元、SMF网元2之间的信令交互建立会话2。
需要说明的是，图3或图4所示的通信系统均是示例性的以终端设备建立的两个冗余会话选择到相同的PCF网元为例进行说明。当然，终端设备建立的两个冗余会话也可能选择到不同的PCF网元，本申请实施例对此不作具体限定。
需要说明的是，本申请实施例中的会话可以为PDU会话或其他会话，在此统一说明，以下不再赘述。
可选的，本申请实施例中的终端设备，可以是用于实现无线通信功能的设备，例如终端或者可用于终端中的芯片等。其中，终端可以是5G网络或者未来演进的PLMN中的用户设备(user equipment，UE)、接入终端、终端单元、终端站、移动站、移动台、远方站、远程终端、移动设备、无线通信设备、终端代理或终端装置等。接入终端可以是蜂窝电话、无绳电话、会话启动协议(session initiation protocol，SIP)电话、无线本地环路(wireless local loop，WLL)站、个人数字处理(personal digital assistant，PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备或可穿戴设备，虚拟现实(virtual reality，VR)终端设备、增强现实(augmented reality，AR)终端设备、工业控制(industrial control)中的无线终端、无人驾驶(self driving)中的无线终端、远程医疗(remote medical)中的无线终端、智能电网(smart grid)中的无线终端、运输安全(transportation safety)中的无线终端、智慧城市(smart city)中的无线终端、智慧家庭(smart home)中的无线终端等。终端可以是移动的，也可以是固定的。
可选的，本申请实施例中的接入设备(包括主接入设备或辅接入设备)是为终端设备提供接入的设备，包含无线接入网(radio access network，RAN)设备和接入网(access network，AN)设备。RAN设备主要是3GPP网络的无线网络设备，AN可以 是非(non)-3GPP定义的接入网设备。
其中，RAN设备主要负责空口侧的无线资源管理、QoS管理、数据压缩和加密等功能。该RAN设备可以包括各种形式的基站，例如：宏基站，微基站(也称为小站)，中继站，接入点等。在采用不同的无线接入技术的系统中，具备基站功能的设备的名称可能会有所不同，例如，在5G系统中，称为RAN或者gNB(5G NodeB)；在长期演进(long term evolution，LTE)系统中，称为演进的节点B(evolved NodeB，eNB或者eNodeB)；在第三代(3rd generation，3G)系统中，称为节点B(Node B)等。
其中，AN设备允许终端设备和3GPP核心网之间采用非3GPP技术互连互通，其中，非3GPP技术例如包括无线保真(wireless fidelity，Wi-Fi)、全球微波互联接入(worldwide interoperability for microwave access，WiMAX)、码分多址(code division multiple access，CDMA)网络等。
可选的，本申请实施例中的策略控制网元、会话管理网元(包括第一会话管理网元或第二会话管理网元)或应用功能网元也可以称之为通信装置，其可以是一个通用设备或者是一个专用设备，本申请实施例对此不作具体限定。
可选的，本申请实施例中的策略控制网元、会话管理网元(包括第一会话管理网元或第二会话管理网元)或应用功能网元的相关功能可以由一个设备实现，也可以由多个设备共同实现，还可以是由一个设备内的一个或多个功能模块实现，本申请实施例对此不作具体限定。可以理解的是，上述功能既可以是硬件设备中的网络元件，也可以是在专用硬件上运行的软件功能，或者是硬件与软件的结合，或者是平台(例如，云平台)上实例化的虚拟化功能。
例如，本申请实施例中的策略控制网元、会话管理网元(包括第一会话管理网元或第二会话管理网元)或应用功能网元的相关功能可以通过图5中的通信设备500来实现。图5所示为本申请实施例提供的通信设备500的结构示意图。该通信设备500包括一个或多个处理器501，通信线路502，以及至少一个通信接口(图5中仅是示例性的以包括通信接口504，以及一个处理器501为例进行说明)，可选的还可以包括存储器503。
处理器501可以是一个通用中央处理器(central processing unit，CPU)，微处理器，特定应用集成电路(application-specific integrated circuit，ASIC)，或一个或多个用于控制本申请方案程序执行的集成电路。
通信线路502可包括一通路，用于连接不同组件之间。
通信接口504，可以是收发模块用于与其他设备或通信网络通信，如以太网，RAN，无线局域网(wireless local area networks，WLAN)等。例如，所述收发模块可以是收发器、收发机一类的装置。可选的，所述通信接口504也可以是位于处理器501内的收发电路，用以实现处理器的信号输入和信号输出。
存储器503可以是具有存储功能的装置。例如可以是只读存储器(read-only memory，ROM)或可存储静态信息和指令的其他类型的静态存储设备，随机存取存储器(random access memory，RAM)或者可存储信息和指令的其他类型的动态存储设备，也可以是电可擦可编程只读存储器(electrically erasable programmable read-only memory，EEPROM)、只读光盘(compact disc read-only memory，CD-ROM)或其他 光盘存储、光碟存储(包括压缩光碟、激光碟、光碟、数字通用光碟、蓝光光碟等)、磁盘存储介质或者其他磁存储设备、或者能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质，但不限于此。存储器可以是独立存在，通过通信线路502与处理器相连接。存储器也可以和处理器集成在一起。
其中，存储器503用于存储执行本申请方案的计算机执行指令，并由处理器501来控制执行。处理器501用于执行存储器503中存储的计算机执行指令，从而实现本申请实施例中提供的策略控制方法。
或者，可选的，本申请实施例中，也可以是处理器501执行本申请下述实施例提供的策略控制方法中的处理相关的功能，通信接口504负责与其他设备或通信网络通信，本申请实施例对此不作具体限定。
可选的，本申请实施例中的计算机执行指令也可以称之为应用程序代码，本申请实施例对此不作具体限定。
在具体实现中，作为一种实施例，处理器501可以包括一个或多个CPU，例如图5中的CPU0和CPU1。
在具体实现中，作为一种实施例，通信设备500可以包括多个处理器，例如图5中的处理器501和处理器508。这些处理器中的每一个可以是一个单核(single-CPU)处理器，也可以是一个多核(multi-CPU)处理器。这里的处理器可以指一个或多个设备、电路、和/或用于处理数据(例如计算机程序指令)的处理核。
在具体实现中，作为一种实施例，通信设备500还可以包括输出设备505和输入设备506。输出设备505和处理器501通信，可以以多种方式来显示信息。例如，输出设备505可以是液晶显示器(liquid crystal display，LCD)，发光二级管(light emitting diode，LED)显示设备，阴极射线管(cathode ray tube，CRT)显示设备，或投影仪(projector)等。输入设备506和处理器501通信，可以以多种方式接收用户的输入。例如，输入设备506可以是鼠标、键盘、触摸屏设备或传感设备等。
上述的通信设备500有时也可以称为通信装置，其可以是一个通用设备或者是一个专用设备。例如通信设备500可以是台式机、便携式电脑、网络服务器、掌上电脑(personal digital assistant，PDA)、移动手机、平板电脑、无线终端设备、嵌入式设备、上述终端设备，上述网络设备、或具有图5中类似结构的设备。本申请实施例不限定通信设备500的类型。
下面将结合图1至图5对本申请实施例提供的策略控制方法进行具体阐述。
需要说明的是，本申请下述实施例中各个网元之间的消息名字或消息中各参数的名字等只是一个示例，具体实现中也可以是其他的名字，本申请实施例对此不作具体限定。
以图2所示的通信系统应用于如图3所示的5G网络为例，如图6所示，为本申请实施例提供的一种策略控制方法，该策略控制方法对应策略更新流程，包括如下步骤：
S601、AF网元获取终端设备的第一地址或终端设备的第二地址中的至少一个。
可选的，本申请实施例中，AF网元可以在确定需要调用PCF网元的服务之后，从绑定支持功能(binding support function，BSF)网元获取PCF网元的信息。并对于 高可靠的业务，当使用两个会话传输业务时，AF网元获取终端设备的第一地址或终端设备的第二地址中的至少一个。其中，第一地址对应的第一会话和第二地址对应的第二会话为终端设备关联的冗余会话。
S602、AF网元向PCF网元发送消息1。PCF网元接收来自AF网元的消息1。
其中，该消息1包括终端设备的第一地址或终端设备的第二地址中的至少一个、应用信息或业务信息等。
示例性的，如图6所示，该消息1例如可以是策略授权创建(policy authorization create)消息。
可选的，本申请实施例中的应用信息或业务信息例如可以包括流描述或应用标识，带宽需求等，本申请实施例对此不作具体限定。
S603、PCF网元确定第一地址对应的第一会话的第一策略规则和第二地址对应的第二会话的第二策略规则。
其中，第一策略规则包括第一QoS控制信息，第二策略规则包括第二QoS控制信息，第一QoS控制信息为第一会话传输业务所需要的QoS控制信息，第二QoS控制信息为第二会话传输业务所需要的QoS控制信息。
可选的，本申请实施例中，PCF网元确定第一地址对应的第一会话的第一策略规则和第二地址对应的第二会话的第二策略规则，可以包括：若上述消息1中包括终端设备的第一地址和终端设备的第二地址，则意味着第一地址对应的第一会话和第二地址对应的第二会话为终端设备关联的冗余会话，进而PCF网元可以根据应用信息或业务信息确定第一地址对应的第一会话的第一策略规则和第二地址对应的第二会话的第二策略规则。
当然，PCF网元还可以根据第一地址确定第一会话的上下文；以及，PCF网元可以根据第二地址确定第二会话的上下文。进而PCF网元在上述确定第一策略规则和第二策略规则时，可以结合第一会话的上下文或第二会话的上下文确定第一策略规则和第二策略规则，在此不作具体限定。
或者，可选的，本申请实施例中，PCF网元确定第一地址对应的第一会话的第一策略规则和第二地址对应的第二会话的第二策略规则，可以包括：若上述消息1中包括终端设备的第一地址，则PCF网元可以根据消息1中的第一地址确定第一会话的上下文，进而可以根据第一会话的上下文获知第一地址对应的第一会话为终端设备的冗余会话，进而PCF网元可以根据应用信息或业务信息确定第一地址对应的第一会话的第一策略规则和第一会话关联的第二会话的第二策略规则。
或者，可选的，本申请实施例中，PCF网元确定第一地址对应的第一会话的第一策略规则和第二地址对应的第二会话的第二策略规则，可以包括：若上述消息1中包括终端设备的第二地址，则PCF网元可以根据消息1中的第二地址确定第二会话的上下文，进而可以根据第二会话的上下文获知第二地址对应的第二会话为终端设备的冗余会话，进而PCF网元可以根据应用信息或业务信息确定第二地址对应的第二会话的第二策略规则和第二会话关联的第一会话的第一策略规则。
当然，在消息1中包括第一地址或第二地址的方案中，PCF网元在上述确定第一策略规则和第二策略规则时，也可以结合第一会话的上下文或第二会话的上下文确定 第一策略规则和第二策略规则，在此不作具体限定。
示例性的，当使用一个会话传输业务时的QoS控制信息中的丢包率为10 -6，当使用两个会话传输业务时，每个会话中传输业务使用的QoS控制信息中的丢包率可以设置为10 -5。
S604、PCF网元向服务第一会话和第二会话的SMF网元发送消息2。SMF网元接收来自PCF网元的消息2。
其中，该消息2包括第一策略规则和第二策略规则。
示例性的，如图6所示，该消息2例如可以是会话管理(session management，SM)策略控制更新通知(policy control update notify)请求消息。
需要说明的是，本申请实施例以图2所示的通信系统应用于如图3所示的5G网络为例进行说明，即对应的是两个冗余会话对应同一个SMF网元的场景。若以图2所示的通信系统应用于如图4所示的5G网络为例进行说明，即对应的是两个冗余会话分别对应不同SMF网元的场景，则此时PCF网元需要向第一会话对应的SMF网元1发送第一策略规则，以及，PCF网元需要向第二会话对应的SMF网元2发送第二策略规则，在此统一说明，以下不再赘述。
可选的，本申请实施例中，PCF网元也可以通过向服务第一会话和第二会话的SMF网元发送两个消息将第一策略规则和第二策略规则发送给该SMF网元。比如，PCF网元也可以通过向服务第一会话和第二会话的SMF网元发送消息A和消息B，其中，消息A中包含第一策略规则，消息B中包含第二策略规则，本申请实施例对此不作具体限定。
S605、SMF网元向PCF网元发送消息3。PCF网元接收来自SMF网元的消息3。
示例性的，如图6所示，该消息3例如可以是SM策略控制更新通知响应消息。
进一步的，在执行完上述步骤S604之后，SMF网元可以向AMF网元发送会话修改请求，触发会话修改流程，相关描述可参考现有的实现方式，在此不再赘述。
当然，若以图2所示的通信系统应用于如图4所示的5G网络为例进行说明，即对应的是两个冗余会话分别对应不同SMF网元的场景，此时各自的SMF网元需要向PCF网元发送上述消息3，在此统一说明，以下不再赘述。
基于本申请实施例提供的策略控制方法，由于PCF网元在确定第一会话的第一策略规则和第二会话的第二策略规则时考虑了第一会话和第二会话为冗余会话的因素，因此，在通过两个冗余会话传输一个业务来保证业务的高可靠性的场景下，不仅降低了对网络资源的需求，且可以避免每个会话的独立控制可能导致的业务需求不能满足而造成业务传输失败的问题。
其中，上述步骤S601至S605中的SMF网元或者AF网元的动作可以由图5所示的通信设备500中的处理器501调用存储器503中存储的应用程序代码来执行，本实施例对此不作任何限制。
图6所示的实施例以PCF网元接收到消息1之后分别确定所述第一地址对应的第一会话的第一策略规则和所述第二地址对应的第二会话的第二策略规则为例进行说明。可选的，本申请实施例中，PCF网元接收到消息1之后，也可以针对该第一会话和该第二会话生成同一个策略规则，即PCF网元确定第一地址对应的第一会话和第二地址 对应的第二会话的策略规则，该策略规则包括QoS控制信息，该QoS控制信息为第一会话和第二会话传输业务所需要的QoS控制信息。进而，PCF网元可以将该策略规则发送给服务第一会话和第二会话的SMF网元；或者，PCF网元将该策略规则分别发送给服务第一会话的SMF网元和服务第二会话的SMF网元。其中，PCF网元确定策略规则的方式与图6所示的实施例类似，在此不再赘述。
可选的，以图1所示的通信系统应用于如图3所示的5G网络，在冗余会话建立过程中，保证服务冗余会话的PCF网元为同一个PCF网元为例，如图7所示，为本申请实施例提供的一种策略控制方法，该策略控制方法对应冗余会话中第一个会话(这里假设为会话1)的建立过程，包括如下步骤：
S701、AMF网元向SMF网元发送消息1。SMF网元接收来自AMF网元的消息1。
其中，该消息1中包括会话1的会话标识(session ID)、会话1对应的数据网络名称(data network name，DNN)1或单网络切片选择辅助信息(single network slice selection assistance information，S-NSSAI)1、以及用户永久标识(subscription permanent identifier，SUPI)等信息。
示例性的，如图7所示，该消息1例如可以是会话创建SM上下文请求。
S702、SMF网元向UDM网元发送消息2。UDM网元接收来自SMF网元的消息2。
其中，该消息2包括会话1对应的DNN1或S-NSSAI1、以及与DNN1或S-NSSAI1对应的DNN2或S-NSSAI2等信息。
示例性的，如图7所示，该消息2例如可以是签约数据获取请求。
可选的，本申请实施例中，会话1关联的会话2对应的DNN2或S-NSSAI2可以是根据消息1中包括的会话1对应的DNN1或S-NSSAI1、以及本地配置信息确定的。其中，本地配置信息例如可以如表一所示。
表一
DNN1/S-NSSAI1 DNN2/S-NSSAI2
需要说明的是，上述表一仅是示例性的给出了关联的DNN或S-NSSAI之间的映射关系，当然，该表格中还可以包括更多的对应信息，本申请实施例对此不作具体限定。
S703、UDM网元向SMF网元发送消息3。SMF网元接收来自UDM网元的消息3。
其中，该消息3中包括终端设备的签约信息。
示例性的，如图7所示，该消息3例如可以是签约数据获取响应。
需要说明的是，本申请实施例中，由于会话1为第一个冗余会话，因此UDM网元上无相关冗余会话的信息，因此消息3中不包括会话1关联的会话2的会话信息。
可选的，本申请实施例中，若上述表一配置在UDM网元上，则上述消息2中可以不包括与DNN1或S-NSSAI1对应的DNN2或S-NSSAI2。而是由UDM网元根据SMF网元提供的会话1对应的DNN1或S-NSSAI1，结合本地配置信息确定UDM网元上不包括会话1关联的会话2的会话信息，本申请实施例对此不做具体限定。
S704、SMF网元确定建立的会话1为冗余会话。
可选的，本申请实施例中，SMF网元可以根据会话1对应的DNN1或S-NSSAI1、以及从UDM网元获取的签约信息确定建立的会话1为冗余会话。
S705、SMF网元确定服务会话1的PCF网元。
可选的，本申请实施例中，由于消息3中不包括会话1关联的会话2的会话信息，因此SMF网元可以根据现有的PCF网元选择的方法确定服务会话1的PCF网元。
S706、SMF网元向UDM网元发送消息4。UDM网元接收来自SMF网元的消息4。
其中，该消息4中包括会话1的会话标识、会话1对应的DNN1或S-NSSAI1以及服务会话1的PCF网元的标识，其中，该PCF网元的标识用于该会话1关联的会话2确定使用相同的PCF网元。
示例性的，如图7所示，该消息4例如可以是注册请求。
S707、UDM网元向SMF网元发送消息5。SMF网元接收来自UDM网元的消息5。
示例性的，如图7所示，该消息5例如可以是注册响应。
S708、SMF网元向服务会话1的PCF网元发送消息6。PCF网元接收来自SMF网元的消息6。
其中，该消息6中包括会话1的信息，该会话1的信息包括第一指示信息，该第一指示信息用于指示会话1为冗余会话。
示例性的，如图7所示，该消息6例如可以是SM策略控制创建请求。
可选的，本申请实施例中，该第一指示信息例如可以包括冗余序列号(redundancy sequence number，RSN)。示例性的，这里的会话1对应的RSN可以设置为1，表明建立的为第一个冗余会话。
可选的，本申请实施例中，该RSN还可以用于指示会话1的接入设备为主接入设备或辅接入设备，在此不作具体限定。
可选的，本申请实施例中，该会话1的信息例如还可以包括会话1的会话标识、会话1对应的DNN1或S-NSSAI1等信息，在此不作具体限定。
S709、可选的，若PCF网元不包括终端设备的签约信息，PCF网元从UDR网元获取终端设备的签约信息。
S710、PCF网元根据第一指示信息，获知会话1为冗余会话。进而，PCF网元生成会话1的策略规则1。其中，策略规则1包括QoS控制信息1，该QoS控制信息1为使用会话1和会话2传输业务时会话1传输业务所需要的QoS控制信息。
可选的，本申请实施例中，PCF网元可以根据终端设备的签约信息生成会话1的策略规则1。
可选的，本申请实施例中，若RSN还可以用于指示会话1的接入设备为主接入设备或辅接入设备，则PCF网元可以根据终端设备的签约信息以及该RSN信息生成会话1的策略规则1。比如，若PCF网元确定会话1使用主接入设备进行用户面传输，则会话1的策略规则1为使用主接入设备传输时的策略规则；或者，若PCF网元确定会话1使用辅接入设备进行用户面传输，则会话1的策略规则1为使用辅接入设备传输时的策略规则，在此统一说明，以下不再赘述。
S711、可选的，PCF网元生成会话1关联的会话2的策略规则2。其中，策略规则2包括QoS控制信息2，该QoS控制信息2为使用会话1和会话2传输业务时会话2传输业务所需要的QoS控制信息。
也就是说，本申请实施例中，PCF网元在根据第一指示信息，获知会话1为冗余 会话之后，在生成会话1的策略规则1的同时，可以根据终端设备的签约信息生成会话2的策略规则2。其中，会话1的策略规则1和会话2的策略规则2为协同的策略规则。
可选的，本申请实施例中，若RSN还可以用于指示会话1的接入设备为主接入设备或辅接入设备，则PCF网元可以根据终端设备的签约信息以及该RSN信息生成会话2的策略规则2。
可选的，步骤S710和步骤S711以PCF网元分别为会话1和会话2生成策略规则为例进行说明。其中，会话1的策略规则1和会话2的策略规则2可以相同，也可以不同，本申请实施例对此不作具体限定。
可选的，本申请实施例中，PCF网元也可以为会话1和会话2生成一个策略规则，该策略规则包括QoS控制信息，该QoS控制信息为会话1和会话2传输业务所需要的QoS控制信息，本申请实施例对此不作具体限定。
S712、PCF网元向服务会话1的SMF网元发送消息7。SMF网元接收来自PCF网元的消息7。
其中，该消息7包括会话1的策略规则1。
示例性的，如图7所示，该消息7例如可以是SM策略控制创建响应。
基于本申请实施例提供的策略控制方法，由于PCF网元在确定会话1的策略规则1时考虑了会话1为冗余会话的因素。可选的，PCF网元在确定会话2的策略规则2时考虑了会话2为冗余会话的因素。因此，在通过两个冗余会话传输一个业务来保证业务的高可靠性的场景下，不仅降低了对网络资源的需求，且可以避免每个会话的独立控制可能导致的业务需求不能满足而造成业务传输失败的问题。
其中，上述步骤S701至S712中的SMF网元或者PCF网元的动作可以由图5所示的通信设备500中的处理器501调用存储器503中存储的应用程序代码来执行，本实施例对此不作任何限制。
或者，可选的，以图1所示的通信系统应用于如图3所示的5G网络，在冗余会话建立过程中，保证服务冗余会话的PCF网元为同一个PCF网元为例，如图8所示，为本申请实施例提供的另一种策略控制方法，该策略控制方法对应冗余会话中第二个会话(这里假设为会话2)的建立过程，包括如下步骤：
S801、AMF网元向SMF网元发送消息1。SMF网元接收来自AMF网元的消息1。
其中，该消息1中包括会话2的会话标识、会话2对应的DNN2或S-NSSAI2、以及SUPI等信息。
示例性的，如图8所示，该消息1例如可以是会话创建SM上下文请求。
S802、SMF网元向UDM网元发送消息2。UDM网元接收来自SMF网元的消息2。
其中，该消息2包括会话2对应的DNN2或S-NSSAI2、以及与DNN2或S-NSSAI2对应的DNN1或S-NSSAI1等信息。
示例性的，如图8所示，该消息2例如可以是签约数据获取请求。
可选的，本申请实施例中，会话2关联的会话1对应的DNN1或S-NSSAI1可以是根据消息1中包括的会话2对应的DNN2或S-NSSAI2、以及本地配置信息确定的。其中，本地配置信息例如可以如上述表一所示。
S803、UDM网元向SMF网元发送消息3。SMF网元接收来自UDM网元的消息3。
其中，该消息3中包括终端设备的签约信息。
此外，由于这里的会话2为第二个冗余会话，因此UDM网元上保存有会话2关联的会话1的信息，该会话1的信息例如可以包括会话1的会话标识、会话1对应的DNN1或S-NSSAI1以及服务会话1的PCF网元的标识。
示例性的，如图8所示，该消息3例如可以是签约数据获取响应。
可选的，本申请实施例中，若上述表一配置在UDM网元上，则上述消息2中可以不包括与DNN2或S-NSSAI2对应的DNN1或S-NSSAI1。而是由UDM网元根据SMF网元提供的会话2对应的DNN2或S-NSSAI2，结合本地配置信息确定UDM网元上包括会话2关联的会话1的会话信息，本申请实施例对此不做具体限定。
S804、SMF网元确定建立的会话2为冗余会话。
可选的，本申请实施例中，SMF网元可以根据会话2对应的DNN2或S-NSSAI2、以及从UDM网元获取的签约信息确定建立的会话2为冗余会话。
S805、SMF网元确定服务会话2的PCF网元。
可选的，本申请实施例中，SMF网元可以根据消息3中包括的会话2关联的会话1的信息，确定服务会话2的PCF网元为服务会话1的PCF网元的标识所标识的PCF网元。
S806、SMF网元向UDM网元发送消息4。UDM网元接收来自SMF网元的消息4。
其中，该消息4中包括会话2的会话标识、会话2对应的DNN2或S-NSSAI2以及服务会话2的PCF网元的标识。
示例性的，如图8所示，该消息4例如可以是注册请求。
S807、UDM网元向SMF网元发送消息5。SMF网元接收来自UDM网元的消息5。
示例性的，如图8所示，该消息5例如可以是注册响应。
S808、SMF网元向服务会话2的PCF网元发送消息6。PCF网元接收来自SMF网元的消息6。
其中，该消息6中包括会话2的信息以及关联会话1的信息。
示例性的，如图8所示，该消息6例如可以是SM策略控制创建请求。
可选的，本申请实施例中，若服务会话1和会话2的SMF网元为同一个，则该消息6也可以是SM策略控制更新请求。也就是说，此时可以重用会话1中SMF网元与PCF网元建立的策略关联，本申请实施例对此不作具体限定。
可选的，本申请实施例中，该会话2的信息中还可以包括会话2对应的RSN。示例性的，会话2对应的RSN可以设置为2，表明建立的为第二个冗余会话。
可选的，会话2对应的RSN还可以用于指示会话2的接入设备为主接入设备或辅接入设备，在此不作具体限定。
可选的，本申请实施例中，关联会话1的信息中可以包括会话1的会话标识、会话1对应的DNN1或S-NSSAI1、或者会话1对应的RSN中的一个或多个，在此不作具体限定。
S809、可选的，若PCF网元不包括终端设备的签约信息，PCF网元从UDR网元获取终端设备的签约信息。
S810、PCF网元根据关联会话1的信息，获知会话2为冗余会话。进而PCF网元根据关联会话1的信息，确定会话2的策略规则2。其中，策略规则2包括QoS控制信息2，该QoS控制信息2为会话2传输业务所需要的QoS控制信息。
可选的，本申请实施例中，PCF网元根据关联会话1的信息，确定会话2的策略规则2，可以包括：PCF网元根据关联会话1的信息，确定会话1的上下文；PCF网元从会话1的上下文中获取策略规则2(该情况对应的是建立会话1时同时生成会话2的策略规则2的场景)；或者，PCF网元从会话1的上下文中获取会话1的策略规则1，PCF网元根据会话1的策略规则1生成会话2的策略规则2(该情况对应的是建立会话1时仅生成会话1的策略规则1的场景)。
可选的，本申请实施例中，若建立会话1时仅生成会话1的策略规则1，则PCF网元根据会话1的策略规则1生成会话2的策略规则2时，还可以结合会话2对应的RSN生成会话2的策略规则2，在此不作具体限定。
S811、PCF网元向服务会话2的SMF网元发送消息7。SMF网元接收来自PCF网元的消息7。
其中，该消息7包括会话2的策略规则2。
示例性的，如图8所示，该消息7例如可以是SM策略控制创建响应。
可选的，本申请实施例中，服务会话2的SMF网元可以与图7所示的实施例中服务会话1的SMF网元是同一个SMF网元，也可以是不同的SMF网元，在此不作具体限定。
基于本申请实施例提供的策略控制方法，由于PCF网元在确定会话2的策略规则2时考虑了会话2为冗余会话的因素，因此，在通过两个冗余会话传输一个业务来保证业务的高可靠性的场景下，不仅降低了对网络资源的需求，且可以避免每个会话的独立控制可能导致的业务需求不能满足而造成业务传输失败的问题。
其中，上述步骤S801至S811中的SMF网元或者PCF网元的动作可以由图5所示的通信设备500中的处理器501调用存储器503中存储的应用程序代码来执行，本实施例对此不作任何限制。
需要说明的是，图8所示的实施例以SMF网元可以根据消息3中包括的会话2关联的会话1的信息，确定服务会话2的PCF网元为服务会话1的PCF网元的标识所标识的PCF网元为例进行说明。当然，也可以通过配置的方式配置特定的DNN和S-NSSAI总是选择某一个PCF网元，本申请实施例对此不作具体限定。
可选的，图6所述的策略更新流程可以是基于图7和图8所示的会话建立过程，其中，第一会话可以为图7中的会话1，第二会话可以为图8中的会话2；或者，第二会话可以为图7中的会话1，第一会话可以为图8中的会话2。或者，基于图7和图8所示的会话建立过程，以图2所示的通信系统应用于如图3所示的5G网络为例，如图9所示，为本申请实施例提供的另一种策略控制方法，该策略控制方法对应策略更新流程，包括如下步骤：
S901、同图6所示的实施例中的步骤S601，相关描述可参考上述步骤S601，在此不再赘述。
S902、AF网元向PCF网元发送消息1或消息2中的至少一个。PCF网元接收来 自AF网元的消息1或消息2中的至少一个。
其中，该消息1包括终端设备的第一地址、以及应用信息或业务信息等。该消息2包括终端设备的第二地址、以及应用信息或业务信息等。应用信息或业务信息的相关描述可参考图6所示的实施例，在此不再赘述。
其中，若步骤S901中，AF网元仅获取终端设备的第一地址，则步骤S902中AF网元可以仅向PCF网元发送消息1；或者，可选的，若步骤S901中，AF网元仅获取终端设备的第二地址，则步骤S902中AF网元可以仅向PCF网元发送消息2；或者，可选的，若步骤S901中，AF网元获取终端设备的第一地址和终端设备的第二地址，则步骤S902中AF网元向PCF网元发送消息1和消息2。
示例性的，如图9所示，该消息1例如可以是策略授权创建消息1；该消息2例如可以是策略授权创建消息2。
S903、PCF网元确定第一地址对应的第一会话的第一策略规则和第二地址对应的第二会话的第二策略规则。
其中，这里的第一会话可以为图7中的会话1，第二会话可以为图8中的会话2；或者，第二会话可以为图7中的会话1，第一会话可以为图8中的会话2，在此不作具体限定。
其中，第一策略规则包括第一QoS控制信息，第二策略规则包括第二QoS控制信息，第一QoS控制信息为第一会话传输业务所需要的QoS控制信息，第二QoS控制信息为第二会话传输业务所需要的QoS控制信息。其中，第一QoS控制信息和第二QoS控制信息为协同的QoS控制信息。
可选的，本申请实施例中，PCF网元确定第一地址对应的第一会话的第一策略规则和第二地址对应的第二会话的第二策略规则，可以包括：若上述步骤S902中AF网元向PCF网元发送消息1和消息2，则PCF网元可以根据第一地址确定第一会话的上下文，根据第二地址确定第二会话的上下文，进而PCF网元可以根据第一会话的上下文和第二会话的上下文确定第一地址对应的第一会话和第二地址对应的第二会话为终端设备关联的冗余会话；进而PCF网元可以根据应用信息或业务信息确定第一地址对应的第一会话的第一策略规则和第二地址对应的第二会话的第二策略规则。
当然，PCF网元在上述确定第一策略规则和第二策略规则时，可以结合第一会话的上下文或第二会话的上下文确定第一策略规则和第二策略规则，在此不作具体限定。
或者，可选的，本申请实施例中，PCF网元确定第一地址对应的第一会话的第一策略规则和第二地址对应的第二会话的第二策略规则，可以包括：若上述步骤S902中AF网元仅向PCF网元发送消息1，则PCF网元可以根据消息1中的第一地址确定第一会话的上下文，进而可以根据第一会话的上下文获知第一地址对应的第一会话为终端设备的冗余会话，进而PCF网元可以根据应用信息或业务信息确定第一地址对应的第一会话的第一策略规则和第一会话关联的第二会话的第二策略规则。
或者，可选的，本申请实施例中，PCF网元确定第一地址对应的第一会话的第一策略规则和第二地址对应的第二会话的第二策略规则，可以包括：若上述步骤S902中AF网元仅向PCF网元发送消息2，则PCF网元可以根据消息2中的第二地址确定第二会话的上下文，进而可以根据第二会话的上下文获知第二地址对应的第二会话为 终端设备的冗余会话，进而PCF网元可以根据应用信息或业务信息确定第二地址对应的第二会话的第二策略规则和第二会话关联的第一会话的第一策略规则。
当然，在AF网元仅向PCF网元发送消息1或消息2的方案中，PCF网元在上述确定第一策略规则和第二策略规则时，也可以结合第一会话的上下文或第二会话的上下文确定第一策略规则和第二策略规则，在此不作具体限定。
S904、PCF网元向服务第一会话和第二会话的SMF网元发送消息3。SMF网元接收来自PCF网元的消息3。
其中，该消息3包括第一策略规则和第二策略规则。
示例性的，如图9所示，该消息3例如可以是SM策略控制更新通知请求消息。
需要说明的是，本申请实施例以图2所示的通信系统应用于如图3所示的5G网络为例进行说明，即对应的是两个冗余会话对应同一个SMF网元的场景。若以图2所示的通信系统应用于如图4所示的5G网络为例进行说明，即对应的是两个冗余会话分别对应不同SMF网元的场景，则此时PCF网元需要向第一会话对应的SMF网元1发送第一策略规则，以及，PCF网元需要向第二会话对应的SMF网元2发送第二策略规则，在此统一说明，以下不再赘述。
S905、SMF网元向PCF网元发送消息4。PCF网元接收来自SMF网元的消息4。
示例性的，如图9所示，该消息4例如可以是SM策略控制更新通知响应消息。
进一步的，在执行完上述步骤S904之后，SMF网元可以向AMF网元发送会话修改请求，触发会话修改流程，相关描述可参考现有的实现方式，在此不再赘述。
当然，若以图2所示的通信系统应用于如图4所示的5G网络为例进行说明，即对应的是两个冗余会话分别对应不同SMF网元的场景，此时各自的SMF网元需要向PCF网元发送上述消息4，在此统一说明，以下不再赘述。
基于本申请实施例提供的策略控制方法，由于PCF网元在确定第一会话的第一策略规则和第二会话的第二策略规则时考虑了第一会话和第二会话为冗余会话的因素，因此，在通过两个冗余会话传输一个业务来保证业务的高可靠性的场景下，不仅降低了对网络资源的需求，且可以避免每个会话的独立控制可能导致的业务需求不能满足而造成业务传输失败的问题。
其中，上述步骤S901至S905中的SMF网元或者AF网元的动作可以由图5所示的通信设备500中的处理器501调用存储器503中存储的应用程序代码来执行，本实施例对此不作任何限制。
可选的，在上述图6或图9所示的策略更新流程中，也可以是由AF网元进行应用需求或业务需求的分解，即第一会话对应第一应用需求或第一业务需求，第二会话对应第二应用需求或第二业务需求。进而，PCF网元在生成策略规则时，可以根据相应的应用需求或业务需求生成对应的策略规则，本申请实施例对此不作具体限定。
可选的，基于图7和图8所示的会话建立过程，如图10所示，为本申请实施例提供的另一种策略控制方法，该策略控制方法对应策略更新流程，包括如下步骤：
S1001、PCF网元确定更新策略规则。
可选的，本申请实施例中，PCF网元接收到SMF网元发送的其中的一个冗余会话的策略关联终止流程，可以确定更新另一个冗余会话的策略规则。
S1002、PCF网元删除一个冗余会话的策略规则，以及更新关联的另一个冗余会话的策略规则。
其中，更新后的策略规则中包括的QoS控制信息为仅使用关联的另一个冗余会话传输业务时所需要的QoS控制信息。
S1003、PCF网元向服务该关联的另一个冗余会话的SMF网元发送消息1，SMF网元接收来自PCF网元的消息1。
其中，该消息1包括关联的另一个冗余会话更新后的策略规则。
示例性的，如图10所示，该消息1例如可以是SM策略控制更新通知请求消息。
S1004、SMF网元向PCF网元发送消息2。PCF网元接收来自SMF网元的消息2。
示例性的，如图10所示，该消息2例如可以是SM策略控制更新通知响应消息。
可选的，本申请实施例中，对于需要删除策略规则的冗余会话，PCF网元还可以通知服务该冗余会话的SMF网元删除该冗余会话的策略规则；若该策略规则为该冗余会话的最后一个策略规则，则SMF网元可以发起该冗余会话的删除流程，本申请实施例对此不作具体限定。
进一步的，在执行完上述步骤S1003之后，SMF网元可以向AMF网元发送会话修改请求，触发会话修改流程，相关描述可参考现有的实现方式，在此不再赘述。
基于该方案，可以使得PCF网元实时为终端设备的会话确定合适的策略规则。
其中，上述步骤S1001至S1004中的SMF网元或者PCF网元的动作可以由图5所示的通信设备500中的处理器501调用存储器503中存储的应用程序代码来执行，本实施例对此不作任何限制。
可选的，本申请实施例中，PCF网元接收到SMF网元发送的其中的一个冗余会话的策略关联终止流程之后，可以决策终止另一个关联的冗余会话的策略关联流程，即PCF网元和SMF网元删除两个冗余会话的策略规则，本申请实施例对此不作具体限定。
可选的，以图1所示的通信系统应用于如图3所示的5G网络，在冗余会话建立过程中，服务冗余会话的PCF网元可以为同一个PCF网元，也可以为不同的PCF网元(即不限制PCF网元的选择)为例，如图11所示，为本申请实施例提供的另一种策略控制方法，该策略控制方法对应冗余会话中第一个会话(这里假设为会话1)的建立过程，包括如下步骤：
S1101-S1104、同图7所示的实施例中的步骤S701-S704，相关描述可参考上述步骤S701-S704，在此不再赘述。
S1105、SMF网元确定服务会话1的PCF网元1。
可选的，本申请实施例中，由于消息3中不包括会话1关联的会话2的会话信息，因此SMF网元可以根据现有的PCF网元选择的方法确定服务会话1的PCF网元1。
S1106、SMF网元向UDM网元发送消息4。UDM网元接收来自SMF网元的消息4。
其中，该消息4中包括会话1的会话标识、以及会话1对应的DNN1或S-NSSAI1。
示例性的，如图11所示，该消息4例如可以是注册请求。
需要说明的是，本申请实施例中，步骤S1106与步骤S1102-S1105之间没有必然的执行先后顺序，可以是在步骤S1101之后的任意时刻执行步骤S1106，在此统一说 明，以下不再赘述。
S1107、UDM网元向SMF网元发送消息5。SMF网元接收来自UDM网元的消息5。
示例性的，如图11所示，该消息5例如可以是注册响应。
S1108-S1111、与图7所示的实施例中的步骤S708-S710类似，区别比如在于将上述步骤S708-S710中的PCF网元替换为本申请实施例中的PCF网元1，其余相关描述可参考上述步骤S708-S710，在此不再赘述。
S1112、PCF网元1向UDR网元发送消息7。UDR网元接收来自PCF网元1的消息7。
其中，该消息7包括会话1的策略规则1。
示例性的，如图11所示，该消息7例如可以是数据管理(data management，DM)更新请求消息。
可选的，本申请实施例中，若PCF网元1执行上述步骤S1111，在该消息7中还可以包括会话1的策略规则1。
S1113、UDR网元向PCF网元1发送消息8。PCF网元1接收来自UDR网元的消息8。
示例性的，如图11所示，该消息8例如可以是DM更新响应消息。
S1114、PCF网元1向服务会话1的SMF网元发送消息9。SMF网元接收来自PCF网元1的消息9。
其中，该消息9包括会话1的策略规则1。
示例性的，如图11所示，该消息9例如可以是SM策略控制创建响应。
需要说明的是，本申请实施例中，步骤S1114与步骤S1112之间没有必然的执行先后顺序，可以是先执行步骤S1112，再执行步骤S1114；也可以是先执行步骤S1114，再执行步骤S1112；还可以是同时执行步骤S1112和步骤S1114，本申请实施例对此不作具体限定。
基于本申请实施例提供的策略控制方法，由于PCF网元1在确定会话1的策略规则1时考虑了会话1为冗余会话的因素。可选的，PCF网元1在确定会话2的策略规则2时考虑了会话2为冗余会话的因素。因此，在通过两个冗余会话传输一个业务来保证业务的高可靠性的场景下，不仅降低了对网络资源的需求，且可以避免每个会话的独立控制可能导致的业务需求不能满足而造成业务传输失败的问题。
其中，上述步骤S1101至S1114中的SMF网元或者PCF网元1的动作可以由图5所示的通信设备500中的处理器501调用存储器503中存储的应用程序代码来执行，本实施例对此不作任何限制。
或者，可选的，以图1所示的通信系统应用于如图3所示的5G网络，在冗余会话建立过程中，服务冗余会话的PCF网元可以为同一个PCF网元，也可以为不同的PCF网元(即不限制PCF网元的选择)为例，如图12所示，为本申请实施例提供的另一种策略控制方法，该策略控制方法对应冗余会话中第二个会话(这里假设为会话2)的建立过程，包括如下步骤：
S1201-S1202、同图8所示的实施例中的步骤S801-S802，相关描述可参考上述步 骤S801-S802，在此不再赘述。
S1203、UDM网元向SMF网元发送消息3。SMF网元接收来自UDM网元的消息3。
其中，该消息3中包括终端设备的签约信息。
此外，由于这里的会话2为第二个冗余会话，因此UDM网元上保存有会话2关联的会话1的信息，该会话1的信息例如可以包括会话1的会话标识、以及会话1对应的DNN1或S-NSSAI1。
示例性的，如图12所示，该消息3例如可以是签约数据获取响应。
S1204、SMF网元确定建立的会话2为冗余会话。
可选的，本申请实施例中，SMF网元可以根据会话2对应的DNN2或S-NSSAI2、以及从UDM网元获取的签约信息确定建立的会话2为冗余会话。
S1205、SMF网元确定服务会话2的PCF网元2。
可选的，本申请实施例中，SMF网元可以根据现有的PCF网元选择的方法确定服务会话2的PCF网元2。
可选的，本申请实施例中的PCF网元2与图11所示的实施例中的PCF网元1可以是同一个PCF网元，也可以是不同的PCF网元，本申请实施例对此不作具体限定。
S1206、SMF网元向UDM网元发送消息4。UDM网元接收来自SMF网元的消息4。
其中，该消息4中包括会话2的会话标识、以及会话2对应的DNN1或S-NSSAI1。
示例性的，如图12所示，该消息4例如可以是注册请求。
需要说明的是，本申请实施例中，步骤S1206与步骤S1202-S1205之间没有必然的执行先后顺序，可以是在步骤S1201之后的任意时刻执行步骤S1206，在此统一说明，以下不再赘述。
S1207、UDM网元向SMF网元发送消息5。SMF网元接收来自UDM网元的消息5。
示例性的，如图12所示，该消息5例如可以是注册响应。
S1208、SMF网元向服务会话2的PCF网元2发送消息6。PCF网元2接收来自SMF网元的消息6。
其中，该消息6中包括会话2的信息以及关联会话1的信息。
示例性的，如图12所示，该消息6例如可以是SM策略控制创建请求。
可选的，本申请实施例中，该会话2的信息中还可以包括会话2对应的RSN。示例性的，会话2对应的RSN可以设置为2，表明建立的为第二个冗余会话。
可选的，会话2对应的RSN还可以用于指示会话2的接入设备为主接入设备或辅接入设备，在此不作具体限定。
可选的，本申请实施例中，关联会话1的信息中可以包括会话1的会话标识、会话1对应的DNN1或S-NSSAI1、或者会话1对应的RSN中的一个或多个，在此不作具体限定。
S1209、可选的，若PCF网元2根据关联会话1的信息确定PCF网元2中未存储会话2的策略规则2，PCF网元2从UDR网元获取终端设备的签约信息。
其中，该签约信息中包括会话1的策略规则1。
当然，本申请实施例中，若PCF网元2与PCF网元1为同一个PCF网元，PCF网元2上可能存储有会话2的策略规则2(对应图11所示的实施例执行步骤S1111的场景)，本申请实施例对此不作具体限定。
S1210、PCF网元2确定会话2的策略规则2。其中，策略规则2包括QoS控制信息2，该QoS控制信息2为使用会话1和会话2传输业务时会话2传输业务所需要的QoS控制信息。
一种可能的实现方式中，若执行步骤S1209，则PCF网元2可以根据会话1的策略规则1生成会话2的策略规则2。
或者，另一种可能的实现方式中，PCF网元根据关联会话1的信息，确定会话2的策略规则2。比如，PCF网元根据关联会话1的信息，确定会话1的上下文；PCF网元从会话1的上下文中获取策略规则2。
S1211、PCF网元2向服务会话2的SMF网元发送消息7。SMF网元接收来自PCF网元的消息7。
其中，该消息7包括会话2的策略规则2。
示例性的，如图12所示，该消息7例如可以是SM策略控制创建响应。
可选的，本申请实施例中，服务会话2的SMF网元可以与图7所示的实施例中服务会话1的SMF网元是同一个SMF网元，也可以是不同的SMF网元，在此不作具体限定。
基于本申请实施例提供的策略控制方法，由于PCF网元在确定会话2的策略规则2时考虑了会话2为冗余会话的因素，因此，在通过两个冗余会话传输一个业务来保证业务的高可靠性的场景下，不仅降低了对网络资源的需求，且可以避免每个会话的独立控制可能导致的业务需求不能满足而造成业务传输失败的问题。
其中，上述步骤S1201至S1211中的SMF网元或者PCF网元2的动作可以由图5所示的通信设备500中的处理器501调用存储器503中存储的应用程序代码来执行，本实施例对此不作任何限制。
可选的，基于图11和图12所示的会话建立过程，以图2所示的通信系统应用于如图4所示的5G网络为例，如图13所示，为本申请实施例提供的另一种策略控制方法，该策略控制方法对应策略更新流程，包括如下步骤：
S1301、AF网元确定调用PCF网元的服务。
其中，本申请实施例中，AF网元可以在确定需要调用PCF网元的服务之后，可以从BSF网元获取PCF网元的信息。
可选的。本申请实施例中，AF网元从BSF网元获取的服务两个冗余会话的PCF网元的信息可以是一个PCF网元的信息或两个PCF网元的信息。若为一个PCF网元的信息，则后续的流程可以参考图6所示的实施例中的步骤S601-S605，在此不再赘述。本申请下述实施例以AF网元从BSF网元获取的服务两个冗余会话的PCF网元的信息为两个PCF网元的信息为例进行说明。
S1302、AF网元向服务第一会话的第一PCF网元发送消息1。PCF网元接收来自AF网元的消息1。
其中，该消息1包括第一会话对应的终端设备的第一地址、以及应用需要信息或业务需要信息等。
示例性的，如图13所示，该消息1例如可以是策略授权创建消息。
其中，这里的第一会话可以为图11中的会话1，第一PCF网元可以为图11中的PCF网元1；或者，第一会话可以为图12中的会话2，第一PCF网元可以为图12中的PCF网元2，在此不作具体限定。
S1303、第一PCF网元确定第一地址对应的第一会话的第一策略规则和第二地址对应的第二会话的第二策略规则。
可选的，本申请实施例中，第一PCF网元确定第一地址对应的第一会话的第一策略规则和第二地址对应的第二会话的第二策略规则，可以包括：PCF网元可以根据消息1中的第一地址确定第一会话的上下文，进而可以根据第一会话的上下文获知第一地址对应的第一会话为终端设备的冗余会话，进而PCF网元可以根据应用信息或业务信息确定第一地址对应的第一会话的第一策略规则和第一会话关联的第二会话的第二策略规则。
S1304、第一PCF网元向服务第一会话的第一SMF网元发送消息2。第一SMF网元接收来自第一PCF网元的消息2。
其中，该消息2包括第一策略规则。
示例性的，如图13所示，该消息2例如可以是SM策略控制更新通知请求消息。
其中，第一SMF网元获取第一会话的第一策略规则之后，可以发起第一会话的修改流程，具体可参考现有的实现方式，在此不再赘述。
S1305、第一SMF网元向第一PCF网元发送消息3。第一PCF网元接收来自SMF网元的消息3。
示例性的，如图13所示，该消息3例如可以是SM策略控制更新通知响应消息。
S1306、第一PCF网元向UDR网元发送消息4。UDR网元接收来自第一PCF网元的消息4。
其中，该消息4包括第二会话的第二策略规则。
示例性的，如图13所示，该消息4例如可以是DM更新请求消息。
S1307、UDR网元确定策略规则发生更新，向服务第二会话的第二PCF网元发送消息5。第二PCF网元接收来自UDR网元的消息5。
其中，该消息5包括第二会话的第二策略规则。
示例性的，如图13所示，该消息5例如可以是策略更新请求消息1。
可选的，若上述第一PCF网元可以为图11中的PCF网元1，则这里的第二PCF网元可以为图12中的PCF网元2；或者，若上述第一PCF网元可以为图12中的PCF网元2，则这里的第二PCF网元可以为图11中的PCF网元1，在此不作具体限定。
S1308、第二PCF网元向服务第二会话的第二SMF网元发送消息6。第二SMF网元接收来自第二PCF网元的消息6。
其中，该消息6包括第二会话的第二策略规则。
示例性的，如图13所示，该消息6例如可以是策略更新请求消息2。
其中，第二SMF网元获取第二会话的第二策略规则之后，可以发起第二会话的修 改流程，具体可参考现有的实现方式，在此不再赘述。
S1309、第二SMF网元向第二PCF网元发送消息7。第二PCF网元接收来自第二SMF网元的消息7。
示例性的，如图13所示，该消息7例如可以是策略更新响应消息2。
S1310、第二PCF网元向UDR网元发送消息8。UDR网元接收来自第二PCF网元的消息8。
示例性的，如图13所示，该消息8例如可以是策略更新响应消息1。
基于本申请实施例提供的策略控制方法，由于第一PCF网元在确定第一会话的第一策略规则和第二会话的第二策略规则时考虑了第一会话和第二会话为冗余会话的因素，因此，在通过两个冗余会话传输一个业务来保证业务的高可靠性的场景下，不仅降低了对网络资源的需求，且可以避免每个会话的独立控制可能导致的业务需求不能满足而造成业务传输失败的问题。
其中，上述步骤S1301至S1310中的第一PCF网元或者AF网元的动作可以由图5所示的通信设备500中的处理器501调用存储器503中存储的应用程序代码来执行，本实施例对此不作任何限制。
可以理解的是，以上各个实施例中，由策略控制网元实现的方法和/或步骤，也可以由可用于策略控制网元的部件实现；由应用功能网元实现的方法和/或步骤，也可以由可用于应用功能网元的部件实现。
上述主要从各个网元之间交互的角度对本申请实施例提供的方案进行了介绍。相应的，本申请实施例还提供了通信装置，该通信装置可以为上述方法实施例中的策略控制网元，或者包含上述策略控制网元的装置，或者为可用于策略控制网元的部件；或者，该通信装置可以为上述方法实施例中的应用功能网元，或者包含上述应用功能网元的装置，或者为可用于应用功能网元的部件。可以理解的是，该通信装置为了实现上述功能，其包含了执行各个功能相应的硬件结构和/或软件模块。本领域技术人员应该很容易意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，本申请能够以硬件或硬件和计算机软件的结合形式来实现。某个功能究竟以硬件还是计算机软件驱动硬件的方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
本申请实施例可以根据上述方法实施例对通信装置进行功能模块的划分，例如，可以对应各个功能划分各个功能模块，也可以将两个或两个以上的功能集成在一个处理模块中。上述集成的模块既可以采用硬件的形式实现，也可以采用软件功能模块的形式实现。需要说明的是，本申请实施例中对模块的划分是示意性的，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式。
比如，以通信装置为上述方法实施例中的策略控制网元为例，图14示出了一种策略控制网元140的结构示意图。该策略控制网元140包括收发模块1401和处理模块1402。所述收发模块1401，也可以称为收发单元用以实现收发功能，例如可以是收发电路，收发机，收发器或者通信接口。
一种可能的实现方式中：
处理模块1402，用于获知第一会话为冗余会话；确定第一会话的第一策略规则，其中，第一策略规则包括第一QoS控制信息，第一QoS控制信息为该第一会话传输业务所需要的QoS控制信息，该业务是通过至少两个会话来传输的，该至少两个会话包括第一会话，该至少两个会话为终端设备关联的冗余会话；收发模块1401，用于向服务第一会话的第一会话管理网元发送第一策略规则。
可选的，处理模块1402，用于获知第一会话为冗余会话，包括：处理模块1402，U盘没回通过收发模块1401接收来自第一会话管理网元的第一会话的信息，第一会话的信息包括第一指示信息，第一指示信息用于指示第一会话为冗余会话。
可选的，至少两个会话还包括第二会话；处理模块1402，还用于生成第二会话的第二策略规则，第二策略规则中包括第二QoS控制信息，第二QoS控制信息为第二会话传输该业务所需要的QoS控制信息。
可选的，第一指示信息包括第一RSN信息。
进一步的，第一RSN信息还用于指示第一会话的接入设备为主接入设备或辅接入设备；处理模块1402，用于生成第一会话的第一策略规则，包括：处理模块1402，用于根据第一指示信息，生成第一会话的第一策略规则。
可选的，至少两个会话还包括第二会话，第二会话为终端设备的第一个冗余会话，第一会话为终端设备的第二个冗余会话；处理模块1402，用于获知第一会话为冗余会话，包括：处理模块1402，用于通过收发模块1401接收来自第一会话管理网元的关联第二会话的信息；根据关联第二会话的信息，获知第一会话为冗余会话。
可选的，处理模块1402用于确定第一会话的第一策略规则，包括：处理模块1402，用于根据关联第二会话的信息，确定第二会话的上下文；从第二会话的上下文中获取第一策略规则；或者，从第二会话的上下文中获取第二会话的第二策略规则，根据第二策略规则生成第一策略规则，其中，第二策略规则包括第二QoS控制信息，第二QoS控制信息为第二会话传输业务所需要的QoS控制信息。
可选的，至少两个会话还包括第二会话，处理模块1402，还用于删除第一策略规则，以及更新第二会话的第二策略规则，其中，第二策略规则包括第二QoS控制信息，第二QoS控制信息为第二会话传输业务所需要的QoS控制信息；更新后的第二会话的第二策略规则包括第三QoS控制信息，第三QoS控制信息为仅使用第二会话传输业务时所需要的QoS控制信息；收发模块1401，还用于向服务第二会话的第二会话管理网元发送更新后的第二策略规则。
可选的，至少两个会话还包括第二会话，处理模块1402，还用于删除第二会话的第二策略规则，以及更新第一策略规则，第二策略规则包括第二QoS控制信息，第二QoS控制信息为第二会话传输业务所需要的QoS控制信息；更新后的第一策略规则包括第四QoS控制信息，第四QoS控制信息为仅使用第一会话传输业务时所需要的QoS控制信息；收发模块1401，还用于向第一会话管理网元发送更新后的第一策略规则。
可选的，至少两个会话还包括第二会话；处理模块1402，还用于确定删除第一策略规则或第二会话的第二策略规则，第二策略规则中包括第二QoS控制信息，第二QoS控制信息为第二会话传输业务所需要的QoS控制信息；处理模块1402，还用于删除第一策略规则和第二策略规则；收发模块1401，还用于向第一会话管理网元发送第 二指示信息，第二指示信息用于指示删除第一策略规则；以及，收发模块1401，还用于向服务第二会话的第二会话管理网元发送第三指示信息，第三指示信息用于指示删除第二策略规则。
另一种可能的实现方式中：
收发模块1401，用于接收来自应用功能网元的终端设备的第一地址；处理模块1402，用于确定该第一地址对应的第一会话的第一策略规则和第二会话的第二策略规则，第一策略规则包括第一QoS控制信息，第二策略规则包括第二QoS控制信息，第一QoS控制信息为第一会话传输业务所需要的QoS控制信息，第二QoS控制信息为第二会话传输业务所需要的QoS控制信息，第一会话与第二会话为终端设备关联的冗余会话；收发模块1401，还用于向服务第一会话的第一会话管理网元发送第一策略规则；以及，收发模块1401，还用于向服务第二会话的第二会话管理网元发送第二策略规则。
可选的，收发模块1401，用于接收来自应用功能网元的终端设备的第一地址，包括：收发模块1401，用于接收来自应用功能网元的第一消息，第一消息包括第一地址和第二会话对应的该终端设备的第二地址。
或者，可选的，收发模块1401，用于接收来自应用功能网元的终端设备的第一地址，包括：收发模块1401，用于接收来自应用功能网元的第二消息，第二消息包括第一地址。
可选的，处理模块1402，还用于获知第一地址对应的第一会话为冗余会话。
可选的，收发模块1401，还用于接收来自应用功能网元的第三消息，该第三消息包括第二会话对应的终端设备的第二地址。
可选的，处理模块1402，还用于获知第一地址对应的第一会话和第二地址对应的第二会话为终端设备关联的冗余会话。
其中，上述方法实施例涉及的各步骤的所有相关内容均可以援引到对应功能模块的功能描述，在此不再赘述。
在本实施例中，该策略控制网元140以采用集成的方式划分各个功能模块的形式来呈现。这里的“模块”可以指特定ASIC，电路，执行一个或多个软件或固件程序的处理器和存储器，集成逻辑电路，和/或其他可以提供上述功能的器件。在一个简单的实施例中，本领域的技术人员可以想到该策略控制网元140可以采用图5所示的通信设备500的形式。
比如，图5所示的通信设备500中的处理器501可以通过调用存储器503中存储的计算机执行指令，使得通信设备500执行上述方法实施例中的策略控制方法。
具体的，图14中的收发模块1401和处理模块1402的功能/实现过程可以通过图5所示的通信设备500中的处理器501调用存储器503中存储的计算机执行指令来实现。或者，图14中的处理模块1402的功能/实现过程可以通过图5所示的通信设备500中的处理器501调用存储器503中存储的计算机执行指令来实现，图14中的收发模块1401的功能/实现过程可以通过图5中所示的通信设备500中的通信接口504来实现。
由于本实施例提供的策略控制网元140可执行上述的策略控制方法，因此其所能获得的技术效果可参考上述方法实施例，在此不再赘述。
或者，比如，以通信装置为上述方法实施例中的应用功能网元为例，图15示出了一种应用功能网元150的结构示意图。该应用功能网元150包括收发模块1501和处理模块1502。所述收发模块1501，也可以称为收发单元用以实现收发功能，例如可以是收发电路，收发机，收发器或者通信接口。
其中，处理模块1502，用于获取终端设备的第一地址或终端设备的第二地址中的至少一个；其中，第一地址对应的第一会话和第二地址对应的第二会话为终端设备关联的冗余会话；收发模块1501，用于向策略控制网元发送第一地址或第二地址中的至少一个。
可选的，第一地址或第二地址中的至少一个用于确定第一会话的第一策略规则和第二会话的第二策略规则，第一策略规则包括第一QoS控制信息，第二策略规则包括第二QoS控制信息，第一QoS控制信息为第一会话传输业务所需要的QoS控制信息，第二QoS控制信息为第二会话传输该业务所需要的QoS控制信息。
其中，上述方法实施例涉及的各步骤的所有相关内容均可以援引到对应功能模块的功能描述，在此不再赘述。
在本实施例中，该应用功能网元150以采用集成的方式划分各个功能模块的形式来呈现。这里的“模块”可以指特定ASIC，电路，执行一个或多个软件或固件程序的处理器和存储器，集成逻辑电路，和/或其他可以提供上述功能的器件。在一个简单的实施例中，本领域的技术人员可以想到该应用功能网元150可以采用图5所示的通信设备500的形式。
比如，图5所示的通信设备500中的处理器501可以通过调用存储器503中存储的计算机执行指令，使得通信设备500执行上述方法实施例中的策略控制方法。
具体的，图15中的收发模块1501和处理模块1502的功能/实现过程可以通过图5所示的通信设备500中的处理器501调用存储器503中存储的计算机执行指令来实现。或者，图15中的处理模块1502的功能/实现过程可以通过图5所示的通信设备500中的处理器501调用存储器503中存储的计算机执行指令来实现，图15中的收发模块1501的功能/实现过程可以通过图5中所示的通信设备500中的通信接口504来实现。
由于本实施例提供的应用功能网元150可执行上述的策略控制方法，因此其所能获得的技术效果可参考上述方法实施例，在此不再赘述。
需要说明的是，以上模块或单元的一个或多个可以软件、硬件或二者结合来实现。当以上任一模块或单元以软件实现的时候，所述软件以计算机程序指令的方式存在，并被存储在存储器中，处理器可以用于执行所述程序指令并实现以上方法流程。该处理器可以内置于SoC(片上系统)或ASIC，也可是一个独立的半导体芯片。该处理器内处理用于执行软件指令以进行运算或处理的核外，还可进一步包括必要的硬件加速器，如现场可编程门阵列(field programmable gate array，FPGA)、PLD(可编程逻辑器件)、或者实现专用逻辑运算的逻辑电路。
当以上模块或单元以硬件实现的时候，该硬件可以是CPU、微处理器、数字信号处理(digital signal processing，DSP)芯片、微控制单元(microcontroller unit，MCU)、人工智能处理器、ASIC、SoC、FPGA、PLD、专用数字电路、硬件加速器或非集成的分立器件中的任一个或任一组合，其可以运行必要的软件或不依赖于软件以执行以上 方法流程。
可选的，本申请实施例还提供了一种通信装置(例如，该通信装置可以是芯片或芯片系统)，该通信装置包括处理器，用于实现上述任一方法实施例中的方法。在一种可能的设计中，该通信装置还包括存储器。该存储器，用于保存必要的程序指令和数据，处理器可以调用存储器中存储的程序代码以指令该通信装置执行上述任一方法实施例中的方法。当然，存储器也可以不在该通信装置中。该通信装置是芯片系统时，可以由芯片构成，也可以包含芯片和其他分立器件，本申请实施例对此不作具体限定。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件程序实现时，可以全部或部分地以计算机程序产品的形式来实现。该计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行计算机程序指令时，全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或者数据中心通过有线(例如同轴电缆、光纤、数字用户线(digital subscriber line，DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可以用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质(例如，软盘、硬盘、磁带)，光介质(例如，DVD)、或者半导体介质(例如固态硬盘(solid state disk，SSD))等。
尽管在此结合各实施例对本申请进行了描述，然而，在实施所要求保护的本申请过程中，本领域技术人员通过查看所述附图、公开内容、以及所附权利要求书，可理解并实现所述公开实施例的其他变化。在权利要求中，“包括”(comprising)一词不排除其他组成部分或步骤，“一”或“一个”不排除多个的情况。单个处理器或其他单元可以实现权利要求中列举的若干项功能。相互不同的从属权利要求中记载了某些措施，但这并不表示这些措施不能组合起来产生良好的效果。
尽管结合具体特征及其实施例对本申请进行了描述，显而易见的，在不脱离本申请的精神和范围的情况下，可对其进行各种修改和组合。相应地，本说明书和附图仅仅是所附权利要求所界定的本申请的示例性说明，且视为已覆盖本申请范围内的任意和所有修改、变化、组合或等同物。显然，本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的精神和范围。这样，倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包含这些改动和变型在内。

Claims (40)

  1. 一种策略控制方法，其特征在于，所述方法包括：
    策略控制网元获知第一会话为冗余会话；
    所述策略控制网元确定所述第一会话的第一策略规则，其中，所述第一策略规则包括第一服务质量QoS控制信息，所述第一QoS控制信息为所述第一会话传输业务所需要的QoS控制信息，所述业务是通过至少两个会话来传输的，所述至少两个会话包括所述第一会话，所述至少两个会话为终端设备关联的冗余会话；
    所述策略控制网元向服务所述第一会话的第一会话管理网元发送所述第一策略规则。
  2. 根据权利要求1所述的方法，其特征在于，所述策略控制网元获知第一会话为冗余会话，包括：
    所述策略控制网元接收来自所述第一会话管理网元的所述第一会话的信息，所述第一会话的信息包括第一指示信息，所述第一指示信息用于指示所述第一会话为冗余会话。
  3. 根据权利要求2所述的方法，其特征在于，所述至少两个会话还包括第二会话，所述方法还包括：
    所述策略控制网元生成所述第二会话的第二策略规则，所述第二策略规则中包括第二QoS控制信息，所述第二QoS控制信息为所述第二会话传输所述业务所需要的QoS控制信息。
  4. 根据权利要求2或3所述的方法，其特征在于，所述第一指示信息包括第一冗余序列号RSN信息。
  5. 根据权利要求4所述的方法，其特征在于，所述第一RSN信息还用于指示所述第一会话的接入设备为主接入设备或辅接入设备；
    所述策略控制网元生成所述第一会话的所述第一策略规则，包括：
    所述策略控制网元根据所述第一指示信息，生成所述第一会话的所述第一策略规则。
  6. 根据权利要求1所述的方法，其特征在于，所述至少两个会话还包括第二会话，所述第二会话为所述终端设备的第一个冗余会话，所述第一会话为所述终端设备的第二个冗余会话；所述策略控制网元获知第一会话为冗余会话，包括：
    所述策略控制网元接收来自所述第一会话管理网元的关联所述第二会话的信息；
    所述策略控制网元根据所述关联所述第二会话的信息，获知所述第一会话为冗余会话。
  7. 根据权利要求6所述的方法，其特征在于，所述策略控制网元确定所述第一会话的第一策略规则，包括：
    所述策略控制网元根据所述关联所述第二会话的信息，确定所述第二会话的上下文；
    所述策略控制网元从所述第二会话的上下文中获取所述第一策略规则；
    或者，所述策略控制网元从所述第二会话的上下文中获取所述第二会话的第二策略规则，所述策略控制网元根据所述第二策略规则生成所述第一策略规则，其中，所 述第二策略规则包括第二QoS控制信息，所述第二QoS控制信息为所述第二会话传输所述业务所需要的QoS控制信息。
  8. 根据权利要求6或7所述的方法，其特征在于，所述关联所述第二会话的信息中包括第一RSN信息。
  9. 根据权利要求1-8任一项所述的方法，其特征在于，所述至少两个会话还包括第二会话，所述方法还包括：
    所述策略控制网元删除所述第一策略规则，以及更新所述第二会话的第二策略规则，其中，所述第二策略规则包括第二QoS控制信息，所述第二QoS控制信息为所述第二会话传输所述业务所需要的QoS控制信息；更新后的所述第二会话的第二策略规则包括第三QoS控制信息，所述第三QoS控制信息为仅使用所述第二会话传输所述业务时所需要的QoS控制信息；
    所述策略控制网元向服务所述第二会话的第二会话管理网元发送更新后的所述第二策略规则。
  10. 根据权利要求1-8任一项所述的方法，其特征在于，所述至少两个会话还包括第二会话，所述方法还包括：
    所述策略控制网元删除所述第二会话的第二策略规则，以及更新所述第一策略规则，所述第二策略规则包括第二QoS控制信息，所述第二QoS控制信息为所述第二会话传输所述业务所需要的QoS控制信息；更新后的所述第一策略规则包括第四QoS控制信息，所述第四QoS控制信息为仅使用所述第一会话传输所述业务时所需要的QoS控制信息；
    所述策略控制网元向所述第一会话管理网元发送更新后的所述第一策略规则。
  11. 根据权利要求1-8任一项所述的方法，其特征在于，所述至少两个会话还包括第二会话，所述方法还包括：
    所述策略控制网元确定删除所述第一策略规则或所述第二会话的第二策略规则，所述第二策略规则中包括第二QoS控制信息，所述第二QoS控制信息为所述第二会话传输所述业务所需要的QoS控制信息；
    所述策略控制网元删除所述第一策略规则和所述第二策略规则；
    所述策略控制网元向所述第一会话管理网元发送第二指示信息，所述第二指示信息用于指示删除所述第一策略规则；
    以及，所述策略控制网元向服务所述第二会话的第二会话管理网元发送第三指示信息，所述第三指示信息用于指示删除所述第二策略规则。
  12. 一种策略控制方法，其特征在于，所述方法包括：
    策略控制网元接收来自应用功能网元的终端设备的第一地址；
    所述策略控制网元确定所述第一地址对应的第一会话的第一策略规则和第二会话的第二策略规则，所述第一策略规则包括第一服务质量QoS控制信息，所述第二策略规则包括第二QoS控制信息，所述第一QoS控制信息为所述第一会话传输业务所需要的QoS控制信息，所述第二QoS控制信息为所述第二会话传输所述业务所需要的QoS控制信息；所述第一会话与所述第二会话为所述终端设备关联的冗余会话；
    所述策略控制网元向服务所述第一会话的第一会话管理网元发送所述第一策略规 则；以及，所述策略控制网元向服务所述第二会话的第二会话管理网元发送所述第二策略规则。
  13. 根据权利要求12所述的方法，其特征在于，所述策略控制网元接收来自应用功能网元的终端设备的第一地址，包括：
    所述策略控制网元接收来自应用功能网元的第一消息，所述第一消息包括所述第一地址和所述第二会话对应的所述终端设备的第二地址。
  14. 根据权利要求12所述的方法，其特征在于，所述策略控制网元接收来自应用功能网元的终端设备的第一地址，包括：
    所述策略控制网元接收来自应用功能网元的第二消息，所述第二消息包括所述第一地址。
  15. 根据权利要求12或14所述的方法，其特征在于，所述方法还包括：
    所述策略控制网元获知所述第一地址对应的所述第一会话为冗余会话。
  16. 一种策略控制方法，其特征在于，所述方法包括：
    应用功能网元获取终端设备的第一地址或所述终端设备的第二地址中的至少一个；其中，所述第一地址对应的第一会话和所述第二地址对应的第二会话为所述终端设备关联的冗余会话；
    所述应用功能网元向策略控制网元发送所述第一地址或所述第二地址中的至少一个。
  17. 根据权利要求16所述的方法，其特征在于，所述第一地址或所述第二地址中的至少一个用于确定所述第一会话的第一策略规则和所述第二会话的第二策略规则，所述第一策略规则包括第一服务质量QoS控制信息，所述第二策略规则包括第二QoS控制信息，所述第一QoS控制信息为所述第一会话传输业务所需要的QoS控制信息，所述第二QoS控制信息为所述第二会话传输所述业务所需要的QoS控制信息。
  18. 一种策略控制网元，其特征在于，所述策略控制网元包括：处理模块和收发模块；
    所述处理模块，用于获知第一会话为冗余会话；
    所述处理模块，还用于确定所述第一会话的第一策略规则，其中，所述第一策略规则包括第一服务质量QoS控制信息，所述第一QoS控制信息为所述第一会话传输业务所需要的QoS控制信息，所述业务是通过至少两个会话来传输的，所述至少两个会话包括所述第一会话，所述至少两个会话为终端设备关联的冗余会话；
    所述收发模块，用于向服务所述第一会话的第一会话管理网元发送所述第一策略规则。
  19. 根据权利要求18所述的策略控制网元，其特征在于，所述处理模块，用于获知第一会话为冗余会话，包括：
    所述处理模块，用于通过所述收发模块接收来自所述第一会话管理网元的所述第一会话的信息，所述第一会话的信息包括第一指示信息，所述第一指示信息用于指示所述第一会话为冗余会话。
  20. 根据权利要求19所述的策略控制网元，其特征在于，所述至少两个会话还包括第二会话；
    所述处理模块，还用于生成所述第二会话的第二策略规则，所述第二策略规则中包括第二QoS控制信息，所述第二QoS控制信息为所述第二会话传输所述业务所需要的QoS控制信息。
  21. 根据权利要求19或20所述的策略控制网元，其特征在于，所述第一指示信息包括第一冗余序列号RSN信息。
  22. 根据权利要求21所述的策略控制网元，其特征在于，所述第一RSN信息还用于指示所述第一会话的接入设备为主接入设备或辅接入设备；
    所述处理模块，用于生成所述第一会话的所述第一策略规则，包括：
    所述处理模块，用于根据所述第一指示信息，生成所述第一会话的所述第一策略规则。
  23. 根据权利要求18所述的策略控制网元，其特征在于，所述至少两个会话还包括第二会话，所述第二会话为所述终端设备的第一个冗余会话，所述第一会话为所述终端设备的第二个冗余会话；所述处理模块，用于获知第一会话为冗余会话，包括：
    所述处理模块，用于通过所述收发模块接收来自所述第一会话管理网元的关联所述第二会话的信息；根据所述关联所述第二会话的信息，获知所述第一会话为冗余会话。
  24. 根据权利要求23所述的策略控制网元，其特征在于，所述处理模块，用于确定所述第一会话的第一策略规则，包括：
    所述处理模块，用于根据所述关联所述第二会话的信息，确定所述第二会话的上下文；从所述第二会话的上下文中获取所述第一策略规则；或者，从所述第二会话的上下文中获取所述第二会话的第二策略规则，根据所述第二策略规则生成所述第一策略规则，其中，所述第二策略规则包括第二QoS控制信息，所述第二QoS控制信息为所述第二会话传输所述业务所需要的QoS控制信息。
  25. 根据权利要求18-24任一项所述的策略控制网元，其特征在于，所述至少两个会话还包括第二会话；
    所述处理模块，还用于删除所述第一策略规则，以及更新所述第二会话的第二策略规则，其中，所述第二策略规则包括第二QoS控制信息，所述第二QoS控制信息为所述第二会话传输所述业务所需要的QoS控制信息；更新后的所述第二会话的第二策略规则包括第三QoS控制信息，所述第三QoS控制信息为仅使用所述第二会话传输所述业务时所需要的QoS控制信息；
    所述收发模块，还用于向服务所述第二会话的第二会话管理网元发送更新后的所述第二策略规则。
  26. 根据权利要求18-24任一项所述的策略控制网元，其特征在于，所述至少两个会话还包括第二会话；
    所述处理模块，还用于删除所述第二会话的第二策略规则，以及更新所述第一策略规则，所述第二策略规则包括第二QoS控制信息，所述第二QoS控制信息为所述第二会话传输所述业务所需要的QoS控制信息；更新后的所述第一策略规则包括第四QoS控制信息，所述第四QoS控制信息为仅使用所述第一会话传输所述业务时所需要的QoS控制信息；
    所述收发模块，还用于向所述第一会话管理网元发送更新后的所述第一策略规则。
  27. 根据权利要求18-24任一项所述的策略控制网元，其特征在于，所述至少两个会话还包括第二会话；
    所述处理模块，还用于确定删除所述第一策略规则或所述第二会话的第二策略规则，所述第二策略规则中包括第二QoS控制信息，所述第二QoS控制信息为所述第二会话传输所述业务所需要的QoS控制信息；
    所述处理模块，还用于删除所述第一策略规则和所述第二策略规则；
    所述收发模块，还用于向所述第一会话管理网元发送第二指示信息，所述第二指示信息用于指示删除所述第一策略规则；
    以及，所述收发模块，还用于向服务所述第二会话的第二会话管理网元发送第三指示信息，所述第三指示信息用于指示删除所述第二策略规则。
  28. 一种策略控制网元，其特征在于，所述策略控制网元包括：处理模块和收发模块；
    所述收发模块，用于接收来自应用功能网元的终端设备的第一地址；
    所述处理模块，用于确定所述第一地址对应的第一会话的第一策略规则和第二会话的第二策略规则，所述第一策略规则包括第一服务质量QoS控制信息，所述第二策略规则包括第二QoS控制信息，所述第一QoS控制信息为所述第一会话传输业务所需要的QoS控制信息，所述第二QoS控制信息为所述第二会话传输所述业务所需要的QoS控制信息，所述第一会话与所述第二会话为所述终端设备关联的冗余会话；
    所述收发模块，还用于向服务所述第一会话的第一会话管理网元发送所述第一策略规则；以及，所述收发模块，还用于向服务所述第二会话的第二会话管理网元发送所述第二策略规则。
  29. 根据权利要求28所述的策略控制网元，其特征在于，所述收发模块，用于接收来自应用功能网元的终端设备的第一地址，包括：
    所述收发模块，用于接收来自应用功能网元的第一消息，所述第一消息包括所述第一地址和所述第二会话对应的所述终端设备的第二地址。
  30. 根据权利要求28所述的策略控制网元，其特征在于，所述收发模块，用于接收来自应用功能网元的终端设备的第一地址，包括：
    所述收发模块，用于接收来自应用功能网元的第二消息，所述第二消息包括所述第一地址。
  31. 根据权利要求30所述的策略控制网元，其特征在于，所述处理模块，还用于获知所述第一地址对应的所述第一会话为冗余会话。
  32. 一种应用功能网元，其特征在于，所述应用功能网元包括：处理模块和收发模块；
    所述处理模块，用于获取终端设备的第一地址或所述终端设备的第二地址中的至少一个；其中，所述第一地址对应的第一会话和所述第二地址对应的第二会话为所述终端设备关联的冗余会话；
    所述收发模块，用于向策略控制网元发送所述第一地址或所述第二地址中的至少一个。
  33. 根据权利要求32所述的应用功能网元，其特征在于，所述第一地址或所述第二地址中的至少一个用于确定所述第一会话的第一策略规则和所述第二会话的第二策略规则，所述第一策略规则包括第一服务质量QoS控制信息，所述第二策略规则包括第二QoS控制信息，所述第一QoS控制信息为所述第一会话传输业务所需要的QoS控制信息，所述第二QoS控制信息为所述第二会话传输所述业务所需要的QoS控制信息。
  34. 一种通信装置，其特征在于，包括：处理器和存储器；所述存储器用于存储计算机执行指令，当所述通信装置运行时，所述处理器执行所述存储器存储的所述计算机执行指令，以使所述通信装置执行如权利要求1-11任一项，或者如权利要求12-15任一项；或者如权利要求16-17任一项所述的策略控制方法。
  35. 一种处理装置，其特征在于，包括：
    存储器，用于存储计算机程序；
    处理器，用于从所述存储器调用并运行所述计算机程序，以执行如权利要求1-11任一项，或者如权利要求12-15任一项；或者如权利要求16-17任一项所述的策略控制方法。
  36. 一种处理器，其特征在于，用于执行如权利要求1-11任一项，或者如权利要求12-15任一项；或者如权利要求16-17任一项所述的策略控制方法。
  37. 一种芯片系统，其特征在于，包括：
    存储器，用于存储计算机程序；
    处理器，用于从所述存储器调用并运行所述计算机程序，使得安装有所述芯片系统的设备执行如权利要求1-11任一项，或者如权利要求12-15任一项；或者如权利要求16-17任一项所述的策略控制方法。
  38. 一种计算机可读存储介质，包括计算机程序，当其在计算机上运行时，使得所述计算机执行如权利要求1-11任一项，或者如权利要求12-15任一项；或者如权利要求16-17任一项所述的策略控制方法。
  39. 一种计算机程序产品，所述计算机程序产品包括计算机程序，当所述计算机程序在计算机上运行时，使得计算机执行如权利要求1-11任一项，或者如权利要求12-15任一项；或者如权利要求16-17任一项所述的策略控制方法。
  40. 一种装置，其特征在于，所述装置用来执行如权利要求1-11任一项，或者如权利要求12-15任一项；或者如权利要求16-17任一项所述的策略控制方法。
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