WO2022068502A1 - 策略规则的提供方法及会话管理网元 - Google Patents

策略规则的提供方法及会话管理网元 Download PDF

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Publication number
WO2022068502A1
WO2022068502A1 PCT/CN2021/115489 CN2021115489W WO2022068502A1 WO 2022068502 A1 WO2022068502 A1 WO 2022068502A1 CN 2021115489 W CN2021115489 W CN 2021115489W WO 2022068502 A1 WO2022068502 A1 WO 2022068502A1
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Prior art keywords
smf
message
policy rule
event
policy
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PCT/CN2021/115489
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English (en)
French (fr)
Inventor
周晓云
吴义壮
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华为技术有限公司
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Publication of WO2022068502A1 publication Critical patent/WO2022068502A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/02Details
    • H04L12/14Charging, metering or billing arrangements for data wireline or wireless communications
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W4/00Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/24Accounting or billing

Definitions

  • the embodiments of the present application relate to the field of communications, and in particular, to a method for providing policy rules and a session management network element.
  • one of the functions of the session management function is to realize the separation of the user plane and the control plane, and is responsible for the function of the control plane, which is the user plane function (UPF). , user plane function) provides policy rules.
  • the first SMF determines a second policy rule according to the first policy rule
  • the first SMF sends the second policy rule to the user plane functional network element UPF, so that the UPF processes the above data.
  • the method further includes:
  • the first SMF receives a third message, where the third message is used to request to update the subscription of the first event, and the third message includes second description information of the above-mentioned data.
  • the second description information may also be referred to as second data Description;
  • the first SMF sends the third description information and the first identifier to the second SMF, so that the second SMF updates the above-mentioned fourth policy rule according to the third description information, obtains the sixth policy rule, and receives the second SMF The sent sixth policy rule, thereby generating a policy rule corresponding to the third description information. After updating the event subscription, update the event subscription again.
  • the first SMF receives a fifth message, where the fifth message is used to request to delete the subscription of the first event;
  • the first SMF sends a sixth message to the second SMF, where the sixth message is used to request deletion of the first policy rule, and the sixth message includes the first identifier and the deletion indication.
  • the method further includes:
  • the first SMF sends a thirteenth message to the second SMF, where the thirteenth message is used to request deletion of the fourth policy rule, and the thirteenth message includes the first identifier and the deletion indication.
  • the first SMF sends the deletion instruction and the first identifier to the second SMF, so that the second SMF deletes the foregoing fourth policy rule according to the deletion instruction.
  • the method further includes:
  • the first SMF receives the request policy indication information sent by the second SMF.
  • the first SMF may know that the request policy indication information is required, so as to obtain the policy rule corresponding to the first event subscription.
  • the requesting policy indication information includes at least one of indication information for applying the policy charging control to the UE, indication information for reporting received downlink data notification event subscription, or indication information for reporting received data description information.
  • the first message further includes event subscription type indication information, where the event subscription type indication information is used to indicate the subscription type of the first event.
  • the first policy rule sent by the first SMF to receive the second SMF includes:
  • the first SMF receives the first policy rule and the notification control indication information sent by the second SMF, and the notification control indication information is determined according to the above-mentioned event subscription type indication information;
  • the first SMF determines the second policy rule based on the first policy rule and the above notification control indication information.
  • Determining the second policy rule by the first SMF according to the first policy rule includes:
  • the first SMF determines the second policy rule according to the first policy rule and the subscription of the first event.
  • the first SMF determines the second policy rule according to the first policy rule and the subscription of the first event, and does not need to carry event subscription type indication information and notification control indication information in messages sent and received with the second SMF , which saves the computing resources and network bandwidth resources of the network elements in the network that need to receive, transmit, and determine the above two indication information.
  • the method further includes:
  • the first SMF receives the second event reported by the UPF after processing the above data
  • the first SMF determines the first event according to the second event, and reports the first event to the event receiving network element, and the event receiving network element is configured to receive a report related to the first event.
  • the second event includes an event in which the data is cached or an event in which the data is lost.
  • the first event includes a downlink data notification failure event or a downlink data transmission status event.
  • the first strategy The rule is the first N4 message.
  • the second strategy The rule is the second N4 message.
  • the notification control indication information is included in the above-mentioned first policy rule.
  • the notification control instruction information is included in the first policy rule, and in the process of forwarding and determining the second policy rule according to the first policy rule, the notification control instruction information is included in the first policy rule, and does not need to be Then, the notification control indication information is separately processed to save the computing resources of the device.
  • the third identifier is an SMF subscription association identifier.
  • the first identifier is a transaction identifier, indicating that A transaction between the first SMF and the second SMF corresponds to a subscription to the first event.
  • the transaction identifier is the NEF notification association identifier
  • the NEF notification association identifier is used to identify the subscription of the first event.
  • a second aspect of the embodiments of the present application provides a method for providing policy rules, and the method includes:
  • the application can request to create a subscription to the first event.
  • the first event is related to the data transmitted by the application and the UE, and the UPF needs to detect the data packet transmitted by the UE.
  • the data packet may include the UE received data.
  • the second SMF may receive a second message sent by the first SMF, where the second message includes first description information and event subscription type indication information, where the event subscription type indication information is used to indicate the event subscription type.
  • Type that is, the type of the first event
  • the first description information is used to identify the data received by the UE, and in this embodiment of the present application, the first description information may also be referred to as the first data description information;
  • the second SMF sends a seventh message to the policy control network element PCF, where the seventh message is used to request the third policy rule corresponding to the above-mentioned first description information, and the seventh message includes the first description information and the downlink data notification event subscription trigger,
  • the downlink data notification event subscription trigger is determined according to the above event subscription type indication information;
  • the second SMF receives the above-mentioned third policy rule sent by the PCF;
  • the second SMF determines the first policy rule according to the third policy rule
  • the second SMF sends the first policy rule to the first SMF.
  • the method further includes:
  • the second SMF receives the first request policy indication information sent by the PCF, where the first request policy indication information includes indication information for reporting that the downlink data notification event subscription is received;
  • the second SMF sends the second request policy indication information to the first SMF, where the second request policy indication information includes the indication information that the policy and charging control is applied to the UE, the above-mentioned indication information of the report reception of downlink data notification event subscription or report reception at least one item of indication information to the data description information; the second request policy indication information is used to instruct the first SMF to obtain the policy rule corresponding to the subscription event.
  • the second SMF sends the second request policy indication information to the first SMF, notifying the first SMF to obtain the policy rule corresponding to the subscription event from the PCF, so that the first SMF obtains the data generated by the PCF through the second SMF. Policy rules to obtain the policy rules required for event subscription.
  • the second SMF receives the third policy rule and the notification control indication information sent by the PCF, and the notification control indication information is determined according to the above-mentioned downlink data notification event subscription trigger;
  • the sending of the first policy rule by the second SMF to the first SMF includes:
  • the second SMF sends the first policy rule and notification control indication information to the first SMF.
  • the second SMF sends the first policy rule to the first SMF and also sends notification control indication information
  • the first SMF can directly determine the second policy rule according to the first policy rule and the notification control indication information, and does not The first event corresponding to the first policy rule needs to be determined, and then the second policy rule is determined according to the first event, which saves the computing resources and time delay of the first SMF and improves the efficiency.
  • the method further includes:
  • the second SMF receives a fourth message sent by the first SMF, where the fourth message includes the first identifier and the second description information of the above-mentioned data, and the fourth message is used to request to update the subscription of the above-mentioned first event;
  • the second SMF sends an eighth message to the PCF.
  • the eighth message includes the second identifier and the second description information.
  • the eighth message is used to request to update the third policy rule.
  • the second identifier is the identifier information of the third policy rule.
  • the second identification is determined according to the first identification;
  • the second SMF sends the fourth policy rule to the first SMF.
  • the second SMF receives the eleventh message sent by the first SMF.
  • the eleventh message is used to request the second SMF to update the fourth policy rule.
  • the eleventh message includes the first identifier and the third description information of the data.
  • the three description information may also be referred to as the third data description information;
  • the second SMF sends the second identification and the third description information to the PCF, to request the PCF to update the above-mentioned fifth policy rule according to the third description information;
  • the second SMF receives the seventh policy rule sent by the PCF, where the seventh policy rule is a policy rule obtained after updating the fifth policy rule according to the third description information;
  • the second SMF updates the above-mentioned fourth policy rule according to the seventh policy rule to obtain the sixth policy rule;
  • the second SMF sends the sixth policy rule to the first SMF.
  • the second SMF sends the third description information and the second identifier to the PCF, so that the PCF updates the fifth policy rule according to the third description information, obtains the seventh policy rule, and receives the seventh policy rule sent by the PCF , thereby generating a sixth policy rule corresponding to the third description information. After updating the event subscription, update the event subscription again.
  • deletion of event subscriptions can also be implemented:
  • the second message further includes a first identifier, where the first identifier is used to identify a transaction between the second SMF and the first SMF, and corresponds to the subscription of the first event;
  • the second SMF receives the sixth message sent by the first SMF, where the sixth message includes the first identifier and the deletion indication;
  • the second SMF sends a ninth message to the PCF.
  • the ninth message is used to request deletion of the third policy rule.
  • the ninth message includes a second identifier.
  • the second identifier is the identifier information of the third policy rule.
  • the second identifier is based on the third policy rule. An identification is determined.
  • the second SMF sends the ninth message to the PCF, so that the PCF deletes the above-mentioned third policy rule according to the second identifier in the ninth message, so as to delete the event subscription.
  • deletion of the updated event subscription can also be implemented:
  • the method further includes:
  • the second SMF receives the thirteenth message sent by the first SMF, where the thirteenth message includes the first identifier and the deletion indication;
  • the second SMF sends a fourteenth message to the PCF, where the fourteenth message is used to request deletion of the fifth policy rule, and the fourteenth message includes a second identifier, and the second identifier is used to identify the fifth policy rule.
  • the second SMF sends a fourteenth message to the PCF, so that the PCF deletes the above-mentioned fifth policy rule according to the second identifier in the fourteenth message, so as to delete the updated event subscription.
  • any one of the first implementation of the second aspect to the sixth implementation of the second aspect, in the seventh implementation of the second aspect of the embodiments of the present application any one of the first implementation of the second aspect to the sixth implementation of the second aspect, in the seventh implementation of the second aspect of the embodiments of the present application,
  • the first event includes a downlink data notification failure event or a downlink data transmission status event.
  • the third policy rule is: PCC rules.
  • the notification control indication information is included in the foregoing third policy rule.
  • the notification control instruction information is included in the above-mentioned third policy rule, and in the process of forwarding and using the first policy rule, the notification control instruction information is included in the third policy rule, and there is no need for the notification control instruction The information is processed separately, saving the computing resources of the device.
  • the notification control indication information is included in the foregoing first policy rule.
  • the notification control indication information is included in the above-mentioned first policy rule, and in the process of forwarding and using the first policy rule, the notification control instruction information is included in the first policy rule, and there is no need to further indicate the notification control instruction.
  • the information is processed separately, saving the computing resources of the device.
  • the first identifier is a transaction identifier, indicating that A transaction between the first SMF and the second SMF corresponds to a subscription to the first event.
  • a third aspect of the embodiments of the present application provides a session management network element, including:
  • a first receiving unit configured to receive a first message, where the first message is used to request the creation of a subscription to a first event, the subscription to the first event is an event subscription for user equipment UE, and the first message includes data The first description information, the data is the data received by the UE;
  • a second receiving unit configured to receive the first policy rule sent by the second SMF
  • a first determining unit configured to determine a second policy rule according to the first policy rule
  • a fourth aspect of the embodiments of the present application provides a session management network element, including:
  • a seventh receiving unit configured to receive a second message sent by the first session management network element SMF, where the first message includes first description information and event subscription type indication information, where the event subscription type indication information is used to indicate event subscription type, the event subscription is an event subscription for user equipment UE, and the first description information is used to identify the data received by the UE;
  • a fifth sending unit configured to send a seventh message to the policy control network element PCF, where the seventh message is used to request a third policy rule corresponding to the first description information, and the seventh message includes the first description information and downlink data notification event subscription trigger, the downlink data notification event subscription trigger is determined according to the event subscription type indication information;
  • an eighth receiving unit configured to receive the third policy rule sent by the PCF
  • a second determining unit configured to determine the first policy rule according to the third policy rule
  • a sixth sending unit configured to send the first policy rule to the first SMF.
  • a fifth aspect of the embodiments of the present application provides a session management network element, including:
  • processors memories, input and output devices, and buses;
  • the processor, the memory, and the input and output devices are connected to the bus;
  • the processor is configured to perform the following steps:
  • the first message is used to request the creation of a subscription to a first event
  • the subscription to the first event is an event subscription for the user equipment UE
  • the first message includes first description information of the data
  • the The data is data received by the UE
  • the session management network element is used to execute the method of the foregoing first aspect.
  • processors memories, input and output devices, and buses;
  • the processor, the memory, and the input and output devices are connected to the bus;
  • the processor is configured to perform the following steps:
  • the first session management network element SMF Receives a second message sent by the first session management network element SMF, where the first message includes first description information and event subscription type indication information, where the event subscription type indication information is used to indicate the type of event subscription, the event subscription For event subscription for user equipment UE, the first description information is used to identify data received by the UE;
  • the first policy rule is sent to the first SMF.
  • the session management network element is used to execute the method of the second aspect.
  • a seventh aspect of the embodiments of the present application provides a method for providing policy rules, and the method includes:
  • the application can request to create a subscription to the first event.
  • the first event is related to the data transmitted by the application and the UE, and the UPF needs to detect the data packet transmitted by the UE.
  • the data packet may include the UE received data.
  • the first session management network element SMF may receive the first policy rule sent by the second SMF, where the first policy rule is generated according to the first description information of the data received by the UE data, in this embodiment of the present application, the first description information may also be referred to as the first data description information;
  • the first SMF determines a second policy rule according to the first policy rule
  • the first SMF sends the second policy rule to the user plane functional network element UPF, so that the UPF processes the above data.
  • the first SMF receives the fourth policy rule sent by the second SMF, where the fourth policy rule is a policy rule obtained after updating the first policy rule according to the second description information of the data;
  • the first SMF updates the second policy rule according to the fourth policy rule, and obtains the policy rule corresponding to the second description information at the first SMF.
  • the second SMF updates the above-mentioned first policy rule according to the second description information to obtain a fourth policy rule, and the first SMF receives the fourth policy rule sent by the second SMF, thereby generating a corresponding policy rule corresponding to the second description information. Policy rules. Implements an update to the event subscription after the event subscription is complete.
  • the first SMF receives the sixth policy rule sent by the second SMF, where the sixth policy rule is a policy rule obtained after updating the fourth policy rule according to the third description information of the data;
  • the first SMF updates the policy rule related to the first event at the first SMF according to the sixth policy rule, and obtains the policy rule corresponding to the above-mentioned third description information at the first SMF.
  • deletion of the event subscription can also be implemented:
  • the first SMF receives the instruction sent by the second SMF to delete the above-mentioned fourth policy rule
  • the first SMF deletes the above-mentioned fourth policy rule, and sends an instruction to delete the policy rule related to the first event to the UPF.
  • the first SMF receives an instruction sent by the second SMF to delete the fourth policy rule, and deletes the fourth policy rule according to the instruction. Implements deletion of updated event subscriptions.
  • the first SMF receives the first policy rule and the notification control indication information sent by the second SMF, and the notification control indication information is determined according to the subscription of the first event;
  • the first SMF determines the second policy rule based on the first policy rule and the above notification control indication information.
  • the first SMF may directly determine the second policy rule according to the first policy rule and the notification control indication information, without determining the first event corresponding to the first policy rule, and then determine the second policy rule according to the first event.
  • the policy rules save the computing resources and time delay of the first SMF, and improve the efficiency.
  • Determining the second policy rule by the first SMF according to the first policy rule includes:
  • the first SMF determines the second policy rule according to the first policy rule and the subscription of the first event.
  • the first SMF determines the second policy rule according to the first policy rule and the subscription of the first event, and does not need to carry notification control indication information in messages sent and received with the second SMF, which saves the need for network
  • the method further includes:
  • the first SMF receives the second event reported by the UPF after processing the above data
  • the first SMF determines the first event according to the second event, and reports the first event to the event receiving network element, and the event receiving network element is configured to receive a report related to the first event.
  • the second event includes an event in which the data is cached or an event in which the data is lost.
  • the first event includes a downlink data notification failure event or a downlink data transmission status event.
  • the second policy rule for the second N4 information in the eleventh implementation manner of the seventh aspect of the embodiments of this application, the second policy rule for the second N4 information.
  • the notification control indication information is included in the foregoing first policy rule.
  • the notification control instruction information is included in the first policy rule, and in the process of forwarding and determining the second policy rule according to the first policy rule, the notification control instruction information is included in the first policy rule, and does not need to be Then, the notification control indication information is separately processed to save the computing resources of the device.
  • An eighth aspect of the embodiments of the present application provides a method for providing policy rules, and the method includes:
  • the application can request to create a subscription to the first event.
  • the first event is related to the data transmitted by the application and the UE, and the UPF needs to detect the data packet transmitted by the UE.
  • the data packet may include the UE received data.
  • the second SMF may send a seventh message to the PCF according to the first request policy indication information.
  • the seventh message includes the first description information and the downlink data notification event subscription trigger, and the downlink data notification event
  • the subscription trigger is determined according to the event subscription type indication information.
  • the event subscription type indication information is used to indicate the type of event subscription, that is, the type of the first event, and the first description information is used to identify the data received by the UE.
  • the first description information may also be referred to as the first data description information;
  • the second SMF receives the above-mentioned third policy rule sent by the PCF;
  • the second SMF determines the first policy rule according to the third policy rule
  • the second SMF sends the first policy rule to the first SMF.
  • the second SMF that can directly interact with the PCF requests the PCF for the third policy rule generated according to the first description information, thereby generating the corresponding first policy rule, and then sends the first policy rule to the first SMF , so that the first SMF obtains the first policy rule generated according to the third policy rule. Since the third policy rule is generated by the PCF, it is realized that the first SMF generates the second policy rule according to the third policy rule generated by the PCF, and the third policy rule is realized.
  • An SMF completes the subscription of events without a direct connection to the PCF.
  • the method further includes:
  • the second SMF receives the first request policy indication information sent by the PCF, where the first request policy indication information includes indication information for reporting that the downlink data notification event subscription is received;
  • the second SMF receives the third policy rule sent by the PCF, it includes:
  • the second SMF receives the third policy rule and the notification control indication information sent by the PCF, and the notification control indication information is determined according to the event subscription type indication information;
  • the sending of the first policy rule by the second SMF to the first SMF includes:
  • the second SMF sends the first policy rule to the first SMF and also sends notification control indication information
  • the first SMF can directly determine the second policy rule according to the first policy rule and the notification control indication information, and does not The first event corresponding to the first policy rule needs to be determined, and then the second policy rule is determined according to the first event, which saves the computing resources and time delay of the first SMF and improves the efficiency.
  • the second SMF receives the third identifier and the second description information of the data, the second description information is used to update the subscription of the first event, and the third identifier is used to identify the subscription of the first event;
  • the second SMF sends an eighth message to the PCF.
  • the eighth message includes the second identifier and the second description information.
  • the eighth message is used to request to update the third policy rule.
  • the second identifier is the identifier information of the third policy rule.
  • the second identification is determined according to the third identification;
  • the second SMF sends the fourth policy rule to the first SMF.
  • the second SMF updates the above-mentioned first policy rule according to the second description information, obtains a fourth policy rule, and sends the fourth policy rule to the first SMF, so that the first SMF generates a corresponding rule corresponding to the second description Information policy rules. Implements an update to the event subscription after the event subscription is complete.
  • the method further includes:
  • the second SMF receives a third identifier and third description information of the above-mentioned data
  • the third description information may also be referred to as third data description information
  • the third identifier is used to identify the subscription of the above-mentioned first event
  • the second SMF sends the second identifier and the third description information to the PCF, so as to request the PCF to update the above-mentioned fifth policy rule according to the third description information;
  • the second SMF receives the seventh policy rule sent by the PCF, where the seventh policy rule is a policy rule obtained after updating the fifth policy rule according to the third description information;
  • the second SMF updates the above-mentioned fourth policy rule according to the seventh policy rule to obtain the sixth policy rule;
  • the second SMF sends the sixth policy rule to the first SMF.
  • the second SMF sends the third description information and the second identifier to the PCF, so that the PCF updates the fifth policy rule according to the third description information, obtains the seventh policy rule, and receives the seventh policy rule sent by the PCF , thereby generating a sixth policy rule corresponding to the third description information. After updating the event subscription, update the event subscription again.
  • deletion of the event subscription can also be implemented:
  • the method further includes:
  • the second SMF receives a third identifier and a deletion instruction, where the third identifier is used to identify the subscription of the first event;
  • the second SMF sends a ninth message to the PCF, where the ninth message is used to request deletion of the third policy rule, the ninth message includes a second identifier, and the second identifier is used to identify the third policy rule.
  • deletion of the updated event subscription can also be implemented:
  • the second SMF receives a third identifier and a deletion instruction, where the third identifier is used to identify the subscription of the first event;
  • the second SMF sends a fourteenth message to the PCF, where the fourteenth message is used to request deletion of the fifth policy rule, the fourteenth message includes a second identifier, and the second identifier is used to identify the fifth policy rule;
  • the first event includes a downlink data notification failure event or a downlink data transmission status event.
  • the first policy rule is: First N4 information.
  • the third policy rule is: PCC rules.
  • the third identifier is an SMF subscription association identifier.
  • the notification control indication information is included in the above-mentioned third policy rule.
  • the notification control indication information is included in the foregoing first policy rule.
  • the notification control indication information is included in the above-mentioned first policy rule, and in the process of forwarding and using the first policy rule, the notification control instruction information is included in the first policy rule, and there is no need for the notification control instruction The information is processed separately, saving the computing resources of the device.
  • the third identifier is an SMF subscription association identifier.
  • the third identifier is the NEF subscription association identifier.
  • a ninth aspect of the embodiments of the present application provides a session management network element, including:
  • the first receiving unit is configured to receive the first policy rule sent by the second SMF.
  • the first policy rule is generated according to the first description information of the data, and the data is the data received by the UE.
  • the first policy rule is The description information may also be referred to as the first data description information;
  • a first determining unit configured to determine a second policy rule according to the first policy rule
  • the first sending unit is configured to send the second policy rule to the user plane function network element UPF, so that the UPF processes the above data.
  • the session management network element is used to execute the method of the aforementioned seventh aspect.
  • a tenth aspect of the embodiments of the present application provides a session management network element, including:
  • the second sending unit is configured to send a seventh message to the PCF according to the first request policy indication information, where the seventh message includes the first description information and a downlink data notification event subscription trigger, and the downlink data notification event subscription trigger is subscribed according to the event
  • the type indication information is determined, the event subscription type indication information is used to indicate the type of event subscription, that is, the type of the first event, and the first description information is used to identify the data received by the UE.
  • the first description information may also be It is called the first data description information;
  • a second receiving unit configured to receive the above-mentioned third policy rule sent by the PCF
  • a second determining unit configured to determine the first policy rule according to the third policy rule
  • a third sending unit configured to send the first policy rule to the first SMF.
  • the session management network element is used to execute the method of the foregoing eighth aspect.
  • An eleventh aspect of the embodiments of the present application provides a session management network element, including:
  • processors memories, input and output devices, and buses;
  • the processor, the memory, and the input and output devices are connected to the bus;
  • the processor is configured to perform the following steps:
  • the first policy rule is generated according to the first description information of the data, and the data is the data received by the UE.
  • the first description information may also be referred to as the first description information. - data description information;
  • the second policy rule is sent to the user plane function network element UPF, so that the UPF processes the above data.
  • the session management network element is used to execute the method of the aforementioned seventh aspect.
  • a twelfth aspect of the embodiments of the present application provides a session management network element, including:
  • processors memories, input and output devices, and buses;
  • the processor, the memory, and the input and output devices are connected to the bus;
  • the processor is configured to perform the following steps:
  • the seventh message includes the first description information and a downlink data notification event subscription trigger
  • the downlink data notification event subscription trigger is determined according to the event subscription type indication information
  • the event subscription The type indication information is used to indicate the type of event subscription, that is, the type of the first event
  • the first description information is used to identify the data received by the UE.
  • the first description information may also be referred to as the first data description information ;
  • a first policy rule is sent to the first SMF.
  • the session management network element is used to execute the method of the foregoing eighth aspect.
  • a thirteenth aspect of an embodiment of the present application provides a computer-readable storage medium, where a program is stored in the computer-readable storage medium, and when the computer executes the program, the first aspect, the second aspect, and the first aspect are executed.
  • the methods described in the seventh aspect and the eighth aspect are executed.
  • a fourteenth aspect of an embodiment of the present application provides a computer program product.
  • the computer program product When the computer program product is executed on a computer, the computer executes the first, second, seventh, and eighth aspects described above. method.
  • Figure 1 is a schematic diagram of a network framework for business capability opening
  • FIG. 3 is a schematic flowchart of a method for providing policy rules in an embodiment of the present application.
  • 4a is another schematic flowchart of a method for providing policy rules in an embodiment of the present application.
  • 4b is another schematic flowchart of a method for providing policy rules in an embodiment of the present application.
  • 5a is another schematic flowchart of a method for providing policy rules in an embodiment of the present application.
  • FIG. 5b is another schematic flowchart of a method for providing policy rules in an embodiment of the present application.
  • FIG. 6 is another schematic flowchart of a method for providing policy rules in an embodiment of the present application.
  • FIG. 7 is another schematic flowchart of a method for providing policy rules in an embodiment of the present application.
  • FIG. 8a is another schematic flowchart of a method for providing policy rules in an embodiment of the present application.
  • FIG. 8b is another schematic flowchart of a method for providing policy rules in an embodiment of the present application.
  • 9a is another schematic flowchart of a method for providing policy rules in an embodiment of the present application.
  • FIG. 10 is a schematic structural diagram of a session management network element in an embodiment of the present application.
  • FIG. 11 is another schematic structural diagram of a session management network element in an embodiment of the present application.
  • FIG. 12 is a schematic structural diagram of a session management network element in an embodiment of the present application.
  • FIG. 14 is a schematic structural diagram of a session management network element in an embodiment of the present application.
  • the embodiment of the present application provides a method for providing policy rules, which is used to obtain PCC rules when SMF cannot directly interact with PCF, thereby obtaining policy rules for UPF to detect data packets.
  • Figure 1 is an architecture diagram of a service capability exposure (SCEF, service capability exposure function) (NEF, network exposure function) that supports the interworking of 4G/5G and next-generation mobile communication networks.
  • SCEF service capability exposure
  • NEF network exposure function
  • the 3GPP network can securely provide business capabilities to the application function (AF, application function) of a third-party application service provider (3drd party ASP, 3drd party application service provider).
  • the network exposure function (NEF, network exposure function) is the core network element in the architecture, which enables the 3GPP network to securely provide the third-party service provider service capability server (SCS, services capability server) or application server (AS, application server) ) to provide business capabilities.
  • SCS third-party service provider service capability server
  • AS application server
  • a corresponding policy to be executed in the UPF needs to be generated according to the PCC rule.
  • the policy can be a packet detection rule (PDR, packet detection rule), or other rules related to packet transmission, such as forwarding action rule (FAR, forwarding action rule), usage reporting rule (URR, usage reporting rule), etc. , which is not specifically limited here.
  • all messages including subscription request messages, update context request messages, update request messages, confirmation messages, etc., are examples of sending messages, and do not constitute a limitation on messages, as long as they carry this message
  • the data described in the embodiment of the application can be considered as the message described in the embodiment of the application, which is not specifically limited here.
  • the embodiment of the present application provides a method for acquiring PCC rules through a second SMF that can directly interact with PCF, so as to formulate policy rules for UPF to detect data packets according to the PCC rules.
  • the V-SMF may also be referred to as the first SMF, and the first SMF cannot interact with the PCF. Except for the V-SMF, other first SMFs that cannot interact with the PCF, such as I-SMF, can be used in this embodiment of the present application. , which is not specifically limited here.
  • the embodiments of the present application take the V-SMF as an example, and do not limit the first SMF.
  • the first and the second are only used to distinguish similar subjects, for example, to distinguish the first SMF that interacts with the UPF but cannot directly interact with the PCF and the second SMF that can directly interact with the PCF; or In distinguishing the first data description information provided when the event is subscribed and the second data description information provided when the event is updated, the first and the second do not limit the similar subject.
  • the triplet information is IP triplet information used to identify the address, port number and protocol type of the application server.
  • the triplet information is the first data description information; in the embodiment of event update, for example In the embodiment shown in Fig. 4a, Fig. 4b, Fig. 8a or Fig. 8b, the triplet information is the second data description information.
  • the application can subscribe to different events from the network, such as a reachable event after downlink data delivery fails, or other events, such as a downlink data delivery status event, which is not limited here.
  • events such as a reachable event after downlink data delivery fails, or other events, such as a downlink data delivery status event, which is not limited here.
  • the following will illustrate the process of providing the policy rules for the policy rules of different events.
  • a process for providing policy rules in the embodiment of the present application includes:
  • the UE accesses the network and establishes a PDU session:
  • the UE accesses the network and establishes a PDU session, which establishes a data channel from the UE to the UPF.
  • the UE can interact with the application server through this data channel.
  • the PCF may send a policy control request trigger (PCRT, policy control request trigger) to the second SMF, and the trigger is a downlink data notification failure event subscription ( downlink data notification failure event subscribed with traffic descriptor).
  • PCRF policy control request trigger
  • the PCRF is used to instruct the second SMF to request the PCF for the PCC rule when receiving the downlink data notification failure event subscription that carries the data description.
  • the PCRT is also referred to as a downlink data notification event subscription trigger.
  • the above-mentioned indication information may also be referred to as request policy indication information or second request policy indication information, which is used to instruct the first SMF to obtain the policy rule corresponding to the subscription event.
  • a downlink data notification failure event may also be referred to as a downlink data transmission failure event or a downlink data transmission failure event, and in this embodiment of the present application, this event is also referred to as a first event .
  • the message carries the event id, the AF notification endpoint, the user's external identifier or external user group identifier, and triplet information.
  • the data description information provided when the event is subscribed is called the first data description information
  • the data description information provided when the event is updated is called the second data description information.
  • the data description information is the first data description information.
  • the AF notification endpoint is used to indicate the endpoint at which the AF receives the event notification, and the AF notification endpoint may include an AF notification target address (AF notification target address).
  • AF notification target address AF notification target address
  • the AF notification endpoint includes the AF notification target address (AF notification target address) and the AF notification associated identifier ( AF notification correlation Id).
  • the NEF sends a subscription request message to the UDM:
  • the NEF sends the Nudm_EventExposure_Subscribe Request message to the UDM to subscribe to the reachable event after the downlink data notification fails.
  • the message carries the event identifier, triplet information and the user's external identifier or external user group identifier received in step 202, and the NEF notification endpoint (NEF notification endpoint) used by the NEF to receive subscription notifications.
  • NEF notification endpoint used by the NEF to receive subscription notifications.
  • the UDM sends a subscription request message to the AMF registered by the UE:
  • the UDM After receiving the user's external identifier in step 203, the UDM can determine the user's internal identifier according to the external identifier.
  • the external identifiers of the users in steps 202 and 203 may also be external user group identifiers, and the external user group identifier represents each of the above-mentioned users.
  • the user group identifier determines the internal identifier of each of the above-mentioned users, which is not specifically limited here.
  • the UDM can determine the AMF registered by the UE according to the corresponding relationship stored locally and the user's internal identity, and send a Namf_EventExposure_Subscribe Request message to the AMF registered by the UE to subscribe to the reachable event after the downlink data notification fails.
  • the UDM may send the above message to the AMF registered by the UE for each UE in the user group.
  • the AMF returns a confirmation message to the UDM:
  • the AMF allocates an AMF subscription correlation id (AMF subscription correlation id) according to the event ID received in step 204, and the AMF subscription correlation ID is used to identify the subscription of the reachable event after the downlink data notification fails, indicating that the event has been successfully subscribed at the AMF.
  • AMF subscription correlation id AMF subscription correlation id
  • the AMF saves the received information, and returns a confirmation message to the UDM, which carries the above-mentioned AMF subscription association identifier.
  • the UDM allocates a UDM subscription correlation id (UDM subscription correlation id) for event subscriptions.
  • the UDM subscription correlation id is used to identify a reachable event after a downlink data notification fails, indicating that the event has been successfully subscribed to at the UDM.
  • the UDM returns an acknowledgment message to the NEF, and the acknowledgment message carries the above-mentioned UDM subscription association identifier.
  • NEF returns a confirmation message to AF:
  • the NEF assigns the NEF subscription correlation id (NEF subscription correlation id) to the event subscription.
  • the NEF subscription correlation id is used to identify the reachable event after the downlink data notification fails, indicating that the event subscription has been successfully subscribed at the NEF.
  • the NEF saves the received information, and returns a confirmation message to the AF, where the confirmation message carries the above-mentioned NEF subscription association identifier.
  • step 206 may be performed before step 205 or 204, as long as it is performed after step 203; step 207 may be performed before any of steps 203 to 206, as long as it is performed after step 202 , which is not specifically limited here.
  • the message carries the notification control indication information, which is used to generate the corresponding policy rule.
  • the specific implementation method is as follows:
  • the AMF sends the first message to the V-SMF:
  • the AMF may generate downlink data notification failure notification indication information according to the subscription of the event in step 204, and the indication information is used to indicate the type of event subscription, which may specifically be the event identifier of the downlink data notification failure event, or the AMF allocation Other identifiers of , which are not specifically limited here.
  • the AMF sends the Nsmf_PDUSession_UpdateSMContext Request message to the V-SMF to subscribe to the downlink data notification failure event.
  • the message may also be referred to as the first message.
  • the first message is used to request the V-SMF to create a subscription to the event, for example, in this embodiment, it is used to request the creation of a subscription to the downlink data notification failure event; in other embodiments, it can also be used to Request to create a subscription for other events; the first message may also be a message in other forms, and the examples here do not limit the first message.
  • the message carries the NEF notification association identifier received in step 204, the triplet information, and the above-mentioned downlink data notification failure notification indication information.
  • the V-SMF returns a confirmation message to the AMF.
  • the V-SMF determines that a policy rule for processing data needs to be requested, and sends a second message to the second SMF:
  • the V-SMF receives the indication information that the policy and charging control is applied to the UE, the indication information that reports the received downlink data notification failure event subscription, or the indication information that reports the received data description information, the V-SMF can It is determined that the PCC applies to the PDU session, and when the V-SMF determines that the data needs to be cached in the UPF, it can also determine that the received event subscription needs to be reported to the second SMF and a policy for processing the data in the UPF is requested.
  • the V-SMF can assign a transaction identifier (Transaction Id) to the event, and the transaction identifier is used to represent the transaction between the V-SMF and the second SMF for subsequent modification and deletion operations. Policy rule request for event subscription.
  • the transaction identifier may also be referred to as first identifier information.
  • the transaction identifier corresponds to the subscription of the first event.
  • the transaction identifier corresponds to the subscription of the downlink data notification failure event.
  • the V-SMF may also allocate DDN_Failure indication information according to the event subscription in step 208, where the DDN_Failure indication information is used to indicate that the received event subscription type is downlink data notification failure subscription.
  • the DDN_Failure indication information is also referred to as event subscription type indication information in this embodiment.
  • the event subscription type indication information is used to indicate the type of event subscription, and is generated according to the event subscription.
  • the event subscription type indication information can also be used to indicate the events of other events. Subscriptions, such as event subscriptions for downlink data delivery status events, are not limited here.
  • the event subscription type indication information may be generated according to the indication information representing the event subscription type in step 208, or may be the indication information representing the event subscription type in step 208, which is not specifically limited here.
  • the V-SMF sends an Nsmf_PDUSession_Update Request message to the second SMF, reporting the received event subscription, and requesting a policy for detecting data.
  • the message carries triple information, the above transaction identifier (Transaction Id) and the above DDN_Failure indication information.
  • the message may also be referred to as a second message.
  • the second message is used to request a policy rule for processing data corresponding to the subscription event to the second SMF.
  • step 210 may also be performed before step 209, as long as it is performed after step 208, which is not specifically limited here.
  • the second SMF sends a seventh message to the PCF:
  • the second message received by the second SMF includes both the triplet information and the transaction identifier.
  • the second SMF After receiving the transaction identifier, the second SMF needs to request the PCF for the PCC rule for detecting the downlink data delivery failure event. Since the PCF previously provided a PCRT that carries the downlink data notification failure event subscription with the data description, the second SMF can send Npcf_SMPolicyControl_Update to the PCF request message. In this embodiment, the message may also be referred to as the seventh message. In the embodiment of the present application, the seventh message is used to request the PCC rule from the PCF.
  • the second SMF determines that the message is used to request the PCC rule for detecting the downlink data delivery failure event, and the second SMF can find the PCRT corresponding to the event received in step 201 .
  • the message carries the triplet information received in step 210 and the above PCRT.
  • the message may also carry an operation indication Create, indicating that the message is used to request a new PCC rule.
  • the PCF formulates the PCC rule, and sends the third policy rule to the second SMF:
  • PCF formulates a PCC rule (PCC rule) according to the triplet information received in step 211, that is, the triplet information is included in the filter template in the PCC rule, and a high priority is set, and the PCC rule includes the PCC rule identifier (PCC rule Id), the PCC rule identifier is used to represent the PCC rule.
  • PCC rule Id PCC rule identifier
  • the PCC rule identifier is used to represent the PCC rule.
  • the PCC rule identifier may also be referred to as second identifier information.
  • the PCF may also determine the DDN Failure notification control indication information according to the PCRT received in step 211, where the DDN Failure notification control indication information is used to indicate that the DNN Failure notification needs to be performed.
  • the DDN Failure notification control indication information may be included in the PCC rule to indicate that the PCC rule is used to detect downlink data notification failure events.
  • the DDN_Failure notification control indication information is also referred to as notification control indication information in this embodiment.
  • the notification control indication information is used to indicate the action corresponding to the event subscription, and is generated according to the event subscription type indication information.
  • the PCF returns an acknowledgement message to the second SMF, and the message carries the above PCC rule.
  • the PCC rule generated during the event subscription process may also be referred to as a third policy rule.
  • the second SMF receives the third policy rule, generates first N4 information (N4 information), and sends the first policy rule to the V-SMF:
  • the second SMF determines the first N4 information carrying the first PDR according to the PCC rule.
  • the PCC rule of step 212 or the confirmation message includes DDN Failure notification control instruction information, so the first N4 information can also include DDN Failure notification control instruction information, and the first PDR is determined according to the above-mentioned PCC rule, and is the same as the above-mentioned PCC rule.
  • Priority information and filter templates are included in the PCC rule.
  • the second SMF returns an acknowledgement message to the V-SMF, and the message carries the above-mentioned first N4 information.
  • the first N4 information generated during the event subscription process may also be referred to as the first policy rule.
  • the DDN Failure notification control indication information may not be included in the first N4 information, but carried in the above-mentioned confirmation message, which is not specifically limited here.
  • the V-SMF sends the second N4 information (second policy rule) to the UPF:
  • the V-SMF can determine that the first N4 information is used to detect the downlink data notification failure event;
  • the V-SMF determines the second N4 information according to the first N4 information. details as follows:
  • the V-SMF can determine the second PDR according to the first PDR.
  • the second PDR is generated according to the above-mentioned first PDR, and includes the same filter template and priority information as the above-mentioned first PDR.
  • the V-SMF may determine the associated FAR according to the DDN Failure notification control indication information and the second PDR.
  • the FAR is used to instruct the UPF to drop and report packets matching the second PDR.
  • the V-SMF When the V-SMF receives the AMF's notification that the UE is in the idle state, the V-SMF can determine the second PDR according to the first PDR, and the second PDR is generated according to the above-mentioned first PDR, including the same filtering as the above-mentioned first PDR. server template and priority information.
  • the V-SMF may determine the associated FAR and URR according to the DDN Failure notification control indication information and the second PDR.
  • the FAR is used to instruct the UPF to discard the buffered data that matches the second PDR
  • the URR is used to instruct the UPF to report when the buffered data packets that match the second PDR are discarded.
  • the first PDR may be directly used as the second PDR, and the second PDR may also be generated in other ways, such as format conversion of the first PDR to generate the second PDR, which is not specifically described here. limited.
  • the V-SMF sends the second N4 information (N4 information) to the UPF, where the second N4 information includes the above-mentioned second PDR, FAR and URR.
  • the second N4 information generated during the event subscription process may also be referred to as the second policy rule.
  • the AMF sends the Nsmf_PDUSession_UpdateSMContext Request message to the V-SMF to subscribe to the downlink data notification failure event.
  • the message may also be referred to as the first message.
  • the message carries the NEF notification association identifier and triplet information received in step 204 .
  • the V-SMF returns a confirmation message to the AMF.
  • the V-SMF determines that a policy rule for processing data needs to be requested, and sends a second message to the second SMF:
  • the V-SMF can assign a transaction identifier (Transaction Id) to the event, and the transaction identifier is used to represent the transaction between the V-SMF and the second SMF for subsequent modification and deletion operations. Policy rule request for event subscription.
  • the transaction identifier may also be referred to as first identifier information.
  • the transaction identifier corresponds to the subscription of the first event.
  • the transaction identifier corresponds to the subscription of the downlink data notification failure event.
  • the V-SMF sends an Nsmf_PDUSession_Update Request message to the second SMF, reporting the received event subscription, and requesting a policy for detecting data.
  • the message carries the triplet information and the above transaction identifier (Transaction Id).
  • the message may also be referred to as a second message.
  • step 210 may also be performed before step 209, as long as it is performed after step 208, which is not specifically limited here.
  • the second message received by the second SMF includes both the triplet information and the transaction identifier.
  • the second SMF After receiving the transaction identifier, the second SMF needs to request the PCF for the PCC rule for detecting the downlink data delivery failure event. Since the PCF previously provided a PCRT that carries the downlink data notification failure event subscription with the data description, the second SMF can send Npcf_SMPolicyControl_Update to the PCF request message. In this embodiment, the message may also be referred to as the seventh message. In the embodiment of the present application, the seventh message is used to request the PCC rule from the PCF.
  • the message carries the triplet information received in step 210 and the above PCRT.
  • PCF formulates a PCC rule (PCC rule) according to the triplet information received in step 211, that is, the triplet information is included in the filter template in the PCC rule, and a high priority is set, and the PCC rule includes the PCC rule identifier (PCC rule Id), the PCC rule identifier is used to represent the PCC rule.
  • PCC rule Id PCC rule identifier
  • the PCC rule identifier is used to represent the PCC rule.
  • the PCC rule identifier may also be referred to as second identifier information.
  • the PCF returns an acknowledgement message to the second SMF, and the message carries the above PCC rule.
  • the PCC rule generated during the event subscription process may also be referred to as a third policy rule.
  • the second SMF receives the third policy rule, generates first N4 information (N4 information), and sends the first policy rule to the V-SMF:
  • the second SMF receives the PCC rule (third policy rule) in step 212, since the second message in step 210 includes both triplet information and transaction identifier, and the PCC rule is generated according to the triplet information , so the second SMF can determine and save the correspondence between the transaction identifier and the PCC rule identifier accordingly.
  • the PCC rule identifier corresponding to the event can be found according to the corresponding relationship, so as to issue a corresponding instruction to the PCF to make the PCF update or delete the PCC rule identifier corresponding to the PCC rule identifier.
  • PCC rules are examples of the PCC rule (third policy rule) in step 212.
  • the second SMF returns a confirmation message to the V-SMF, and the message carries the above-mentioned first N4 information and transaction identifier.
  • the first N4 information generated during the event subscription process may also be referred to as the first policy rule.
  • the V-SMF sends the second N4 information (second policy rule) to the UPF:
  • the V-SMF can subscribe and associate the first N4 information in the message with the downlink data notification failure event according to the transaction identifier in the message in step 213, and determine the first N4 information in the message to subscribe to the downlink data notification failure event.
  • An N4 message is used to detect the downlink data notification failure event.
  • the V-SMF can determine the second PDR according to the first PDR.
  • the second PDR is generated according to the above-mentioned first PDR, and includes the same filter template and priority information as the above-mentioned first PDR.
  • the V-SMF may determine the associated FAR according to the downlink data notification failure event subscription and the second PDR.
  • the V-SMF When the V-SMF receives the AMF's notification that the UE is in the idle state, the V-SMF can determine the second PDR according to the first PDR, and the second PDR is generated according to the above-mentioned first PDR, including the same filtering as the above-mentioned first PDR. server template and priority information.
  • the V-SMF may determine the associated FAR and URR according to the downlink data notification failure event subscription and the second PDR.
  • the FAR is used to instruct the UPF to discard the buffered data that matches the second PDR
  • the URR is used to instruct the UPF to report when the buffered data packets that match the second PDR are discarded.
  • the first PDR may be directly used as the second PDR, and the second PDR may also be generated in other ways, such as format conversion of the first PDR to generate the second PDR, which is not specifically described here. limited.
  • the V-SMF sends the second N4 information (N4 information) to the UPF, where the second N4 information includes the above-mentioned second PDR, FAR and URR.
  • the second N4 information generated during the event subscription process may also be referred to as the second policy rule.
  • the first SMF determines the second policy rule according to the first policy rule and the subscription of the first event, and does not need to carry event subscription type indication information and notification control indication information in messages sent and received with the second SMF , which saves the computing resources and network bandwidth resources of the network elements in the network that need to receive, transmit, and determine the above two indication information.
  • the UPF informs the V-SMF that the matched data packets are discarded:
  • the UPF matches the data packets according to the second PDR, and after discarding the data packets matching the second PDR according to the above-mentioned FAR, notifies the V-SMF that the matching data packets are discarded; or,
  • the UPF matches the data packets according to the second PDR, and buffers the data packets matching the second PDR according to the above-mentioned FAR.
  • the number of buffered packets exceeds a certain threshold, UPF discards the data.
  • the matched data packets notified to the V-SMF according to the URR are discarded.
  • the event of discarding data in step 215 may also be referred to as the second event, and the first SMF may determine the first event according to the second event.
  • the downlink data transmission failure event may be determined according to the event of discarding data.
  • V-SMF informs AMF that downlink data transmission fails:
  • the V-SMF After receiving the message that the data packet is discarded from the UPF, the V-SMF can send the Nsmf_PDUSession_SMContextStatusNotify message to the AMF to notify the AMF that the downlink data transmission fails.
  • the message includes the NEF notification association identifier received by the SMF in step 208 .
  • the AMF may also be called an event receiving network element, and the event receiving network element is used to receive a report related to the first event, which is a report of a downlink data transmission failure event in this embodiment.
  • AMF determines that the UE is reachable:
  • the AMF sets the notification-on-available-after-DDN-failure flag bit.
  • the AMF may determine that it needs to send the available-DDN-failure event report according to the reachability notification flag after downlink data delivery failure.
  • AMF informs NEF that the UE is reachable:
  • the AMF sends a Reachability Event Report to the NEF after the downlink data delivery fails. Specifically, the AMF may send a Namf_EventExposure_Notify Request message to the NEF, where the message carries the event identifier received in step 204 and the NEF notification endpoint.
  • NEF informs AF that the UE is reachable:
  • the NEF sends the Nnef_EventExposure_Notify Request message to the AF, and the message carries the event identifier received in step 203 and the AF notification endpoint.
  • the first SMF (which may be a V-SMF or an I-SMF) requests the SMF for a policy for detecting downlink data status, and the SMF further requests the PCF for PCC rules.
  • the first SMF detects the data packet of the subscription event.
  • the second SMF may also initiate a request for the PCC rule, and then send the N4 information to the first SMF (which may be V-SMF or I-SMF).
  • the first SMF which may be V-SMF or I-SMF.
  • a process for providing policy rules in the embodiment of the present application includes:
  • Steps 301 to 307 are similar to steps 201 to 207 in the embodiment shown in FIG. 2 , and will not be repeated here.
  • the AMF sends an update context request message to the V-SMF:
  • the AMF can generate downlink data notification failure (downlink data notification failure) notification indication information according to the subscription of the event in step 304, and the indication information is used to indicate that when a downlink data notification failure event occurs, the event is reported.
  • downlink data notification failure downlink data notification failure
  • the AMF sends the Nsmf_PDUSession_UpdateSMContext Request message to the V-SMF to subscribe to the downlink data notification failure event.
  • the message carries the NEF notification association identifier, triplet information and the above-mentioned downlink data notification failure (downlink data notification failure) notification indication information received in step 304.
  • the downlink data notification failure notification indication information may also be referred to as event subscription type indication information.
  • the V-SMF sends an update request message to the second SMF:
  • the V-SMF may determine that the PCF needs to be requested for the PCC rule, and at this time the V-SMF may generate an indication that the UPF caches the data or an indication that the PCC is requested.
  • the V-SMF sends the Nsmf_PDUSession_Update Request message to the SMF to subscribe to the downlink data notification failure event.
  • the message carries the NEF notification association identifier, triplet information and downlink data notification failure (downlink data notification failure) notification indication information received in step 308, as well as the indication of the above-mentioned UPF cached data or the indication of requesting the PCC.
  • the second SMF returns a confirmation message to the V-SMF:
  • the V-SMF returns a confirmation message to the AMF:
  • steps 312 to 315 There are two implementations of steps 312 to 315, as follows:
  • the second SMF determines that a policy rule for processing data needs to be requested, and sends an update request message to the PCF:
  • the second SMF may determine that it needs to request PCC rules from the PCF due to the receipt of the indication of the UPF buffering data or the indication of requesting the PCC in step 309 .
  • the PCF previously provided a PCRT that carries a downlink data notification failure event subscription with data description, and the second SMF may send an Npcf_SMPolicyControl_Update request to the PCF to request a policy rule for processing data.
  • the message carries the triplet information received in step 309 and the PCRT that carries the downlink data notification failure event subscription of the data description.
  • the PCRT may also be referred to as event subscription type indication information.
  • the event subscription type indication information is used to indicate the type of event subscription.
  • the message may also carry an operation indication Create, indicating that the message is used to request a new PCC rule.
  • step 312 may also be performed before step 310 or 311, as long as it is performed after step 309, which is not specifically limited here.
  • the PCF formulates the PCC rule, and sends the third policy rule to the second SMF:
  • step 313 is similar to the implementation manner of step 212 in FIG. 2 , and details are not repeated here.
  • the second SMF receives the third policy rule, generates first N4 information (N4 information), and sends the first policy rule to the V-SMF:
  • the second SMF receives the PCC rule (third policy rule) in step 313, since the PCC rule is generated based on the triple information in the message in step 312, and the triple information is updated in step 309
  • the context request message is obtained together with the NEF notification association identifier, so the second SMF can determine and save the correspondence between the NEF notification association identifier and the PCC rule identifier accordingly.
  • the second SMF determines the first N4 information carrying the first PDR according to the PCC rule.
  • the PCC rule of step 313 or the confirmation message includes DDN Failure notification control instruction information, so the first N4 information can also include DDN Failure notification control instruction information, and the first PDR is determined according to the above-mentioned PCC rule, and is the same as the above-mentioned PCC rule.
  • Priority information and filter templates are examples of
  • the second SMF returns an acknowledgement message to the V-SMF, and the message carries the above-mentioned first N4 information.
  • the first N4 information generated during the event subscription process may also be referred to as the first policy rule.
  • the DDN Failure notification control indication information may not be included in the first N4 information, but carried in the above-mentioned confirmation message, which is not specifically limited here.
  • the V-SMF sends the second N4 information (second policy rule) to the UPF:
  • step 315 is similar to the implementation manner of step 214 in FIG. 2 , and details are not repeated here.
  • the second SMF may send an Npcf_SMPolicyControl_Update request to the PCF to request a policy rule for processing data.
  • the message carries the triplet information received in step 309 and the PCRT that carries the downlink data notification failure event subscription of the data description.
  • the message may also carry an operation indication Create, indicating that the message is used to request a new PCC rule.
  • step 312 may also be performed before step 310 or 311, as long as it is performed after step 309, which is not specifically limited here.
  • the PCF formulates the PCC rule, and sends the third policy rule to the second SMF:
  • step 313 The implementation manner of B in step 313 is similar to the implementation manner of B in step 212 in the example implemented in FIG. 2 , and details are not described herein again.
  • the second SMF receives the PCC rule (third policy rule) in step 313, since the PCC rule is generated based on the triple information in the message in step 312, and the triple information is updated in step 309
  • the context request message is obtained together with the NEF notification association identifier, so the second SMF can determine and save the correspondence between the NEF notification association identifier and the PCC rule identifier accordingly.
  • the second SMF determines the first N4 information carrying the first PDR according to the PCC rule.
  • the first PDR is determined according to the aforementioned PCC rule, and carries the same priority information and filter template as the aforementioned PCC rule.
  • the second SMF returns an acknowledgement message to the V-SMF, and the message carries the above-mentioned first N4 information.
  • the first N4 information generated during the event subscription process may also be referred to as the first policy rule.
  • the V-SMF sends the second N4 information (second policy rule) to the UPF:
  • step 315 The implementation manner of B in step 315 is similar to the implementation manner of B in step 214 in the example implemented in FIG. 2 , and details are not repeated here.
  • the UE accesses the network and establishes a PDU session:
  • AF sends a subscription request message to NEF:
  • the AF sends the Nnef_EventExposure_Subscribe Request message to the NEF, requesting to update the availability of downlink data notification failure event subscription.
  • the message carries the NEF subscription association identifier and the updated triplet information.
  • the triplet information will be used to replace the first data description information during the original subscription, and a policy corresponding to the triplet information will be generated. rule.
  • the triplet information is also referred to as second data description information or second description information.
  • the NEF subscription association identifier is generated by the NEF during the event subscription process.
  • the NEF sends a subscription request message to the UDM:
  • the NEF sends the Nudm_EventExposure_Subscribe Request message to the UDM, requesting to update the downlink data notification if the notification fails to reach the event subscription.
  • the UDM sends a subscription request message to the AMF registered by the UE:
  • the UDM sends the Namf_EventExposure_Subscribe Request message to the AMF registered by the UE, requesting to update the downlink data notification after the failure of the reachable event subscription.
  • the message carries the AMF subscription association identifier and the above triplet information.
  • the AMF subscription association identifier is generated by AMF during the event subscription process.
  • the AMF returns a confirmation message to the UDM:
  • the AMF updates the subscription information of the event according to the AMF subscription association identifier and triplet information received in step 404a, and returns a confirmation message to the UDM.
  • the UDM returns a confirmation message to the NEF:
  • the UDM may update the subscription information of the event according to the UDM subscription association identifier and triplet information received in step 403a, and return the confirmation message to the NEF.
  • NEF returns a confirmation message to AF:
  • the NEF may update the subscription information of the event according to the NEF subscription association identifier and triplet information received in step 402a, and return the confirmation message to the AF.
  • step 406a may also be performed before step 404a or step 405a, as long as it is performed after step 403a; step 407a may also be performed before any of steps 403a to 406a, as long as it is performed after step 402a. Yes, it is not limited here.
  • the AMF sends a third message to the V-SMF:
  • the AMF sends the Nsmf_PDUSession_UpdateSMContext Request message to the V-SMF, requesting to update the event subscription of the downlink data notification failure.
  • the message may also be referred to as a third message.
  • the third message is used to request the V-SMF to subscribe to the update event.
  • the message carries the NEF notification association identifier and the above triplet information.
  • the NEF notification association identifier is received during the event subscription process.
  • the V-SMF returns a confirmation message to the AMF.
  • the V-SMF updates the subscription information of the event according to the above-mentioned NEF notification association identifier and triplet information, and returns a confirmation message to the AMF.
  • steps 410a to 414a There are two implementations of steps 410a to 414a, as follows:
  • the message carries the notification control indication information, which is used to generate the corresponding policy rule.
  • the specific implementation method is as follows:
  • the V-SMF sends a fourth message to the second SMF:
  • the V-SMF may determine the downlink data notification failure event according to the NEF notification association identifier, and determine that the subscription of the event needs to be updated according to the message.
  • the NEF notification association identifier may also be referred to as a third identifier, which is used to identify the subscription of the first event.
  • the V-SMF sends an Nsmf_PDUSession_Update Request message to the second SMF, where the message is used to request to update the first N4 information.
  • the message may also be referred to as a fourth message.
  • the fourth message is used to request the second SMF to update the policy rule for processing data corresponding to the subscription event.
  • the message carries triple information, transaction identifier and DDN_Failure indication information.
  • DDN_Failure indication information also called event subscription type indication information, is generated during the event subscription process and is used to indicate the type of event subscription.
  • step 410a may also be performed before step 409a, as long as it is performed after step 408a, which is not specifically limited here.
  • the second SMF sends an eighth message to the PCF:
  • the second SMF saves the correspondence between the transaction identifier and the PCC rule identifier, and at this time, the second SMF can determine the corresponding PCC rule identifier according to the transaction identifier.
  • the message carries triple information, PCC rule identifier, and PCRT received during the event subscription process.
  • the message may also carry an operation indication Modify, indicating that the message is used to request an updated PCC rule.
  • the PCF updates the PCC rule according to the triplet information, and sends the fifth policy rule to the second SMF:
  • the PCF updates the PCC rule according to the triplet information, that is, the triplet information is included in the filter template in the PCC rule.
  • the PCC rule may include DDN Failure notification control indication information.
  • the DDN Failure notification control indication information is generated during the event subscription process, and the PCF can determine the indication information through the correspondence between the indication information and the PCC rule identifier; the DDN Failure notification control indication information can also be generated by the PCF according to the above DDN_Failure indication information , which is not specifically limited here.
  • the PCF returns an acknowledgement message to the second SMF, and the message carries the updated PCC rule.
  • the PCC rule generated during the event subscription process may also be referred to as a third policy rule.
  • the DDN Failure notification control indication information may also be carried in the confirmation message, which is not specifically limited here.
  • the second SMF updates the first N4 information (N4 information), and sends the fourth policy rule to the V-SMF:
  • the second SMF updates the first N4 information carrying the first PDR according to the PCC rule.
  • the first N4 information also includes DDN Failure notification control indication information, and the first PDR is determined according to the above PCC rule, and carries the same priority information and filter template as the above PCC rule.
  • the V-SMF sends the second N4 information to the UPF:
  • the V-SMF determines that the first N4 information is used to detect the downlink data failure notification event.
  • the V-SMF determines the second N4 information according to the first N4 information.
  • the V-SMF determines the second N4 information according to the first N4 information. details as follows:
  • the V-SMF When the V-SMF receives the AMF's notification that the UE is in the idle state, the V-SMF can determine the second PDR according to the first PDR, and the second PDR is generated according to the above-mentioned first PDR, including the same filtering as the above-mentioned first PDR. server template and priority information.
  • the V-SMF may determine the associated FAR and URR according to the DDN Failure notification control indication information and the second PDR.
  • the FAR is used to instruct the UPF to discard the buffered data that matches the second PDR
  • the URR is used to instruct the UPF to report when the buffered data packets that match the second PDR are discarded.
  • the first PDR may be directly used as the second PDR, and the second PDR may also be generated in other ways, such as format conversion of the first PDR to generate the second PDR, which is not specifically described here. limited.
  • the V-SMF sends the second N4 information (N4 information) to the UPF, where the second N4 information includes the above-mentioned second PDR, FAR and URR.
  • the second N4 information generated during the event subscription process may also be referred to as the second policy rule.
  • the V-SMF determines that a request to update the policy rule for processing data needs to be requested, and sends a fourth message to the second SMF:
  • the V-SMF can determine the downlink data notification failure event according to the NEF notification association identifier in the third message, and determine that the subscription of the event needs to be updated according to the message.
  • the NEF notification association identifier may also be referred to as a third identifier, which is used to identify the subscription of the first event.
  • the V-SMF sends an Nsmf_PDUSession_Update Request message to the second SMF, where the message is used to request to update the first N4 information.
  • the message may also be referred to as a fourth message.
  • the message carries triple information and transaction identifier.
  • the transaction identifier is generated when the event is subscribed, and is used to represent the event between the first SMF and the second SMF, and specifically corresponds to the subscription of the downlink data notification failure event in this embodiment.
  • the second SMF sends an eighth message to the PCF:
  • the second SMF saves the correspondence between the transaction identifier and the PCC rule identifier, and at this time, the second SMF can determine the corresponding PCC rule identifier according to the transaction identifier.
  • the second SMF sends an Npcf_SMPolicyControl_Update request message to the PCF, where the message is used to request to update the PCC rule corresponding to the above-mentioned PCC rule identifier.
  • the message may also be referred to as the eighth message.
  • the message carries triple information and PCC rule identifier.
  • the PCRT may be carried in the message.
  • the message may also carry an operation indication Modify, indicating that the message is used to request an updated PCC rule.
  • the PCF updates the PCC rule according to the triplet information, and sends the fifth policy rule to the second SMF:
  • the PCF updates the PCC rule according to the triplet information, that is, the triplet information is included in the filter template in the PCC rule.
  • the PCF returns an acknowledgement message to the second SMF, and the message carries the updated PCC rule.
  • the PCC rule generated during the event update process may also be referred to as the fifth policy rule.
  • the second SMF updates the first N4 information (N4 information), and sends the fourth policy rule to the V-SMF:
  • the second SMF updates the first N4 information carrying the first PDR according to the PCC rule.
  • the first PDR is determined according to the aforementioned PCC rule, and carries the same priority information and filter template as the aforementioned PCC rule.
  • the PCC rule received by the second SMF includes the PCC rule identifier. Since the second SMF saves the correspondence between the PCC rule identifier and the transaction identifier when subscribing, the second SMF can use the PCC rule The identifier determines the transaction identifier corresponding to the PCC rule.
  • the second SMF returns a confirmation message to the V-SMF, and the message carries the above-mentioned first N4 information and the above-mentioned transaction identifier.
  • the first N4 information generated during the event update process may also be referred to as the fourth policy rule.
  • the V-SMF sends the second N4 information to the UPF:
  • the V-SMF may associate the first N4 information with the downlink data notification failure event subscription according to the transaction identifier received in step 413a, and determine that the first N4 information is used to detect the downlink data notification failure event.
  • the V-SMF subscribes and determines the second N4 information according to the first N4 information and the downlink data failure notification event subscription.
  • the V-SMF can determine the second PDR according to the first PDR.
  • the second PDR is generated according to the above-mentioned first PDR, and includes the same filter template and priority information as the above-mentioned first PDR.
  • the V-SMF may determine the associated FAR according to the downlink data notification failure event subscription and the second PDR.
  • the first PDR may be directly used as the second PDR, and the second PDR may also be generated in other ways, such as format conversion of the first PDR to generate the second PDR, which is not specifically described here. limited.
  • the V-SMF sends the second N4 information (N4 information) to the UPF, where the second N4 information includes the above-mentioned second PDR, FAR and URR.
  • the second N4 information generated during the event subscription process may also be referred to as the second policy rule.
  • Steps 415a to 419a are similar to steps 215 to 219 in the example implementation in FIG. 2 , and are not repeated here.
  • the present embodiment provides the process of obtaining the corresponding policy rule when the above event is updated.
  • the V-SMF can be replaced by I-SMF, which is not limited here.
  • the process includes:
  • the UE accesses the network and establishes a PDU session:
  • the AF has completed the subscription of the reachable event after the downlink data notification fails according to the embodiment shown in FIG. 3 .
  • Steps 402b to 407b are similar to steps 402a to 407a in the example of FIG. 4a, and are not repeated here.
  • the message carries the NEF notification association identifier and the above triplet information.
  • the NEF notification association identifier is received during the event subscription process.
  • the V-SMF sends an update request message to the second SMF:
  • the V-SMF sends an Nsmf_PDUSession_Update Request message to the second SMF, requesting to update the event subscription of the downlink data notification failure.
  • the message carries the NEF notification association identifier and the above triplet information.
  • the second SMF returns a confirmation message to the V-SMF.
  • the V-SMF returns a confirmation message to the AMF.
  • steps 412b to 415b There are two implementation manners for steps 412b to 415b, as follows:
  • the message carries the notification control indication information, which is used to generate the corresponding policy rule.
  • the specific implementation method is as follows:
  • the second SMF receives the update request message, and may determine the downlink data notification failure event according to the NEF notification association identifier in the message, and determine according to the message that the subscription of the event needs to be updated.
  • the NEF notification association identifier may also be referred to as a third identifier, which is used to identify the subscription of the first event.
  • the second SMF saves the correspondence between the NEF notification association identifier and the PCC rule identifier, and the NEF notification association identifier corresponds to the event subscription. At this time, the second SMF can determine the corresponding event subscription. PCC Rule ID.
  • the message carries triple information and PCC rule identifier. and DDN Failure indication.
  • DDN Failure indication information also known as event subscription type indication information, is generated during the event subscription process and is used to indicate the type of event subscription.
  • the message may also carry an operation indication Modify, indicating that the message is used to request an updated PCC rule.
  • step 412b may also be performed before step 410b or 411b, as long as it is performed after step 409b, which is not specifically limited here.
  • step 413b to step 415b is similar to the implementation manner of step 412a to step 414a in FIG. 4a, and will not be repeated here.
  • the second SMF determines that it is necessary to request to update the policy rule for processing data, and sends the updated triplet information to the PCF:
  • the second SMF saves the correspondence between the transaction ID and the PCC rule ID, and the transaction ID corresponds to the event subscription. At this time, the second SMF can determine the PCC rule ID corresponding to the event subscription. .
  • the second SMF sends an Npcf_SMPolicyControl_Update request message to the PCF, where the message is used to request to update the PCC rule corresponding to the above-mentioned PCC rule identifier.
  • the message carries triple information and PCC rule identifier.
  • the above PCRT may be carried in the message.
  • step 413b to step 415b is similar to the implementation manner of step 412a to step 414a in the example of FIG. 4a, and details are not repeated here.
  • Steps 416b to 420b are similar to steps 415a to 419a of the example implemented in FIG. 4a, and are not repeated here.
  • the first SMF, the second SMF and the PCF are based on the event subscription type indication information and notification control indication information, or the association between the data description information identifier, the PCC rule identifier and the subscription event , the PCC rule, the first PDR, the second PDR, the FAR, and the URR related to the subscription event are updated to the corresponding policy rule generated according to the second data description information, so as to realize the update of the policy rule of the event.
  • the present embodiment provides a process of deleting the event subscription when the above event is deleted.
  • V -SMF can be replaced with I-SMF, which is not limited here.
  • the process includes:
  • the UE accesses the network and establishes a PDU session:
  • step 401a in the example implemented in FIG. 4a, and will not be repeated here.
  • the AF sends a de-subscription request message to the NEF:
  • AF sends Nnef_EventExposure_Unsubscribe Request message to NEF, requesting to delete the subscription of reachable events after downlink data delivery fails.
  • the message carries the NEF subscription association identifier received during the event subscription process.
  • the NEF sends a subscription request message to the UDM:
  • NEF sends a Nudm_EventExposure_Unsubscribe Request message to UDM, requesting to delete the subscription of reachable events after downlink data delivery fails.
  • the message carries the UDM subscription association identifier received during the event subscription process.
  • the UDM sends a subscription request message to the AMF registered by the UE:
  • the UDM sends a Namf_EventExposure_Unsubscribe Request message to the AMF registered by the UE, requesting to delete the subscription of reachable events after downlink data delivery fails.
  • the message carries the AMF subscription association identifier received during the event subscription process.
  • the AMF returns a confirmation message to the UDM.
  • the UDM returns a confirmation message to the NEF.
  • the NEF returns a confirmation message to the AF.
  • the AMF sends the fifth message to the V-SMF:
  • the AMF sends the Nsmf_PDUSession_UpdateSMContext Request message to the V-SMF, requesting to delete the downlink data notification failure event.
  • the message carries the de-subscription indication and the NEF notification correlation ID (Notification Correlation Id) received during the event subscription process.
  • step 506a may also be performed before step 504a or step 505a, as long as it is performed after step 503a; step 507a may also be performed before any of steps 503a to 506a, as long as it is performed after step 502a. Yes; step 508a may also be performed before any of steps 505a to 507a, as long as it is performed after step 504a, which is not limited here.
  • the V-SMF returns a confirmation message to the AMF.
  • the V-SMF determines that it needs to request to delete the first N4 information, and sends a sixth message to the second SMF:
  • the V-SMF may determine the downlink data delivery failure event according to the NEF notification association identifier in step 508a, and determine that the subscription of the event needs to be deleted according to the de-subscription indication, thereby determining that the first N4 information needs to be requested to be deleted.
  • the NEF notification association identifier may also be referred to as a third identifier, which is used to identify the subscription of the first event.
  • the V-SMF saves the correspondence between the event subscription and the transaction ID, and at this time, the transaction ID corresponding to the event subscription can be queried.
  • the V-SMF sends an Nsmf_PDUSession_Update Request message to the SMF, and the message carries an instruction for requesting to delete the first N4 information.
  • the message is also called a sixth message, and the sixth message is used to request deletion of the first N4 information.
  • the message carries the transaction identifier and the operation instruction delete.
  • the second SMF sends the ninth message to the PCF:
  • the second SMF saves the correspondence between the transaction identifier and the PCC rule identifier, and at this time, the second SMF can determine the corresponding PCC rule identifier according to the transaction identifier.
  • the message carries the PCC rule identifier and the operation instruction delete.
  • the PCF deletes the PCC rule, and returns a confirmation message to the SMF:
  • the PCF may delete the PCC rule corresponding to the PCC rule identifier according to the PCC rule identifier received in step 511a.
  • the PCF returns a confirmation message to the second SMF, and the message carries an instruction to delete the PCC rule corresponding to the PCC rule identifier.
  • the message may include the PCC rule identifier and the deletion instruction.
  • the second SMF deletes the first N4 information locally stored in the second SMF according to the deleted PCC rule identifier, and sends an instruction to delete the first N4 information to the V-SMF.
  • the V-SMF interacts with the UPF to delete the corresponding PDR, FAR and URR.
  • the V-SMF determines that the second N4 information needs to be deleted according to the received instruction to delete the first N4 information, and the V-SMF and the UPF interact to delete the PDR, FAR and URR corresponding to the second N4 information.
  • the present embodiment provides a process for deleting the event subscription when the above event is deleted.
  • V -SMF can be replaced with I-SMF, which is not limited here.
  • the process includes:
  • the UE accesses the network and establishes a PDU session:
  • Steps 502b to 507b are similar to steps 502a to 507a in the example implemented in FIG. 5a, and are not repeated here.
  • the AMF sends an update context request message to the V-SMF:
  • the AMF sends the Nsmf_PDUSession_UpdateSMContext Request message to the V-SMF, requesting to delete the downlink data notification failure event.
  • the message carries the de-subscription indication and the associated identifier of the NEF notification received during the event subscription process.
  • the V-SMF sends an update request message to the second SMF:
  • the V-SMF sends an Nsmf_PDUSession_Update Request message to the second SMF, requesting to delete the downlink data notification failure event.
  • the message carries the NEF notification association identifier and the unsubscribe indication.
  • the unsubscribe instruction in step 509b may be generated according to the unsubscribe instruction in step 508b, or the unsubscribe instruction in step 508b, which is not specifically limited here.
  • the second SMF returns a confirmation message to the V-SMF.
  • the V-SMF returns a confirmation message to the AMF.
  • the second SMF determines that a request to delete the policy rule for processing data needs to be requested, and sends a request to delete the PCC rule to the PCF:
  • the second SMF receives the update request message, and the second SMF can determine the downlink data delivery failure event according to the NEF notification association identifier in the request, and determine that the subscription of the event needs to be deleted according to the de-subscription instruction, thereby determining that the request is required.
  • the NEF notification association identifier may also be referred to as a third identifier, which is used to identify the subscription of the first event.
  • the second SMF saves the correspondence between the NEF notification association identifier and the PCC rule identifier, and the NEF notification association identifier corresponds to the event subscription. At this time, the second SMF can determine the corresponding event subscription. PCC Rule ID.
  • the second SMF sends an Npcf_SMPolicyControl_Update request to the PCF, requesting to delete the PCC rule.
  • the message carries the PCC rule identifier and the operation instruction delete.
  • step 512b may also be performed before step 510b or 511b, as long as it is performed after step 509b, which is not limited here.
  • Steps 513b to 515b are similar to steps 512a to 514a of the example implemented in FIG. 5a, and are not repeated here.
  • the first SMF, the second SMF and the PCF subscribe the events to the relevant PCC rules, the first PDR according to the association between the data description information identifier, the PCC rule identifier and the subscription event.
  • the second PDR, FAR, URR and other policy rules are deleted, which realizes the deletion of the policy rules of the event.
  • the event identifier may also be an identifier of other events, such as a downlink data delivery status event.
  • Different event identifiers represent different subscription events, and correspondingly, different PCC rules and policies will be generated. According to the rules, the network element will also perform different operations accordingly, which is not limited here.
  • the downlink data delivery state event may also be referred to as a downlink data transmission state event or a downlink data notification state event, and in this embodiment of the present application, the event is also referred to as a first event.
  • a process for providing policy rules in the embodiment of the present application includes:
  • the UE accesses the network and establishes a PDU session:
  • the UE accesses the network and establishes a PDU session, which establishes a data channel from the UE to the UPF.
  • the UE can interact with the application server through this data channel.
  • the PCF may send a policy control request trigger (PCRT, policy control request trigger) to the second SMF, and the trigger is a downlink data delivery state event subscription ( downlink data delivery status event subscribed with traffic descriptor).
  • PCT policy control request trigger
  • the PCRF is used to instruct the second SMF to request the PCF for the PCC rule when receiving the downlink data delivery status event subscription carrying the data description.
  • the PCRT is also referred to as a downlink data notification event subscription trigger.
  • the PCF may send a report to the second SMF that indicates that the downlink data notification event subscription is received.
  • the indication information is also referred to as first request policy indication information.
  • the second SMF may, according to the PCRT carrying the downlink data notification failure event subscription carrying the data description, determine the indication information for applying the policy charging control to the UE, and report the indication information or report that the downlink data notification failure event subscription is received.
  • the indication information that the data description information is received is sent to the V-SMF.
  • the above-mentioned indication information may also be referred to as request policy indication information or second request policy indication information, which is used to instruct the first SMF to obtain the policy rule corresponding to the subscription event.
  • the message carries the event id, the AF notification endpoint, the triplet information, the user's external identifier or external user group identifier, and the discarded delivery status.
  • the subscription delivery status may also be cache or transfer.
  • This embodiment takes the discarded delivery status as an example, and does not limit the subscription delivery status.
  • the data description information provided when the event is subscribed is called the first data description information
  • the data description information provided when the event is updated is called the second data description information.
  • the data description information is the first data description information.
  • the event identifier represents the subscribed event, and in this embodiment, is the identifier of the downlink data delivery status event.
  • the AF notification endpoint is used to indicate an endpoint for the AF to receive event notifications, and the AF notification endpoint may include an AF notification target address (AF notification target address).
  • AF notification target address AF notification target address
  • the AF notification endpoint includes the AF notification target address (AF notification target address) and the AF notification associated identifier ( AF notification correlation Id).
  • the NEF sends a subscription request message to the UDM:
  • NEF sends a Nudm_EventExposure_Subscribe Request message to UDM to subscribe to downlink data delivery status events.
  • the message carries the event identifier, triplet information, discarded delivery status and the user's external identifier or external user group identifier received in step 602, and the NEF notification endpoint (NEF notification endpoint) used by the NEF to receive subscription notifications.
  • NEF notification endpoint used by the NEF to receive subscription notifications.
  • the NEF notification endpoint is used to indicate the endpoint that NEF uses to receive subscription notifications.
  • the NEF notification endpoint may include the NEF notification target address (NEF notification target address) and the NEF notification correlation ID (NEF notification correlation Id).
  • NEF notification target address NEF notification target address
  • NEF notification correlation Id NEF notification correlation ID
  • the UDM sends a subscription request message to the second SMF registered by the UE:
  • the UDM After receiving the user's external identifier in step 603, the UDM can determine the user's internal identifier according to the external identifier.
  • the external identifiers of the users in steps 602 and 603 may also be external user group identifiers, and the external user group identifier represents each of the above-mentioned users.
  • the user group identifier determines the internal identifier of each of the above-mentioned users, which is not specifically limited here.
  • the UDM can determine the second SMF registered by the UE according to the corresponding relationship stored locally and the user's internal identifier, and send an Nsmf_EventExposure_Subscribe Request message to the second SMF registered by the UE to subscribe to downlink data delivery status events.
  • the message carries the event identifier received in step 203, the triplet information, the NEF notification endpoint, the discarded delivery status, and the above-mentioned user internal identifier.
  • the UDM may send the above message to the second SMF registered by the UE for each UE in the user group.
  • the second SMF sends the first message to the V-SMF:
  • the second SMF sends an Nsmf_EventExposure_Subscribe Request message to the V-SMF registered by the UE to subscribe to downlink data delivery status events.
  • the message may also be referred to as the first message;
  • the message carries the event identifier received in step 604, the NEF notification association identifier, the triplet information, the discarded delivery status, and the above-mentioned user internal identifier.
  • the second SMF may send the above message to the V-SMF registered by the UE for each UE in the user group.
  • the V-SMF returns a confirmation message to the second SMF:
  • the V-SMF allocates an SMF subscription correlation ID (SMF subscription correlation id) according to the event ID received in step 605, and the SMF subscription correlation ID is used to identify the downlink data delivery status event, indicating that the event has been successfully subscribed at the V-SMF.
  • SMF subscription correlation ID SMF subscription correlation id
  • the V-SMF saves the received information, and returns a confirmation message to the second SMF, where the message carries the above-mentioned SMF subscription related identifier.
  • the second SMF returns a confirmation message to the UDM:
  • the second SMF allocates an SMF subscription correlation ID (SMF subscription correlation id) according to the event ID received in step 604, and the SMF subscription correlation ID is used to identify the downlink data delivery status event, indicating that the event has been successfully subscribed to at the second SMF.
  • SMF subscription correlation ID SMF subscription correlation ID
  • the second SMF saves the received information, and returns a confirmation message to the UDM, where the message carries the above-mentioned SMF subscription related identifier.
  • Step 607 may also be performed before step 605 or 606, as long as it is performed after step 603.
  • the UDM returns a confirmation message to the NEF:
  • the UDM allocates a UDM subscription correlation id (UDM subscription correlation id) for event subscription, and the UDM subscription correlation id is used to identify the downlink data delivery status event, indicating that the event has been successfully subscribed at the UDM.
  • UDM subscription correlation id UDM subscription correlation id
  • the UDM returns an acknowledgment message to the NEF, and the acknowledgment message carries the above-mentioned UDM subscription association identifier.
  • NEF returns a confirmation message to AF:
  • the NEF assigns the NEF subscription correlation id (NEF subscription correlation id) to the event subscription, and the NEF subscription correlation id is used to identify the downlink data delivery status event, indicating that the event subscription has been successfully subscribed at the NEF.
  • NEF subscription correlation id NEF subscription correlation id
  • the NEF saves the received information, and returns a confirmation message to the AF, where the confirmation message carries the above-mentioned NEF subscription association identifier.
  • step 608 may be performed before any one of steps 604 to 607, as long as it is performed after step 603; step 609 may be performed before any of steps 603 to 608, as long as it is performed after step 602 It can be executed, which is not specifically limited here.
  • steps 610 to 614 There are two implementation manners for steps 610 to 614, as follows:
  • the message carries the notification control indication information, which is used to generate the corresponding policy rule.
  • the specific implementation method is as follows:
  • the V-SMF determines that a policy rule for processing data needs to be requested, and sends a second message to the second SMF:
  • the V-SMF receives the indication information that the policy and charging control is applied to the UE, reports the indication information that the downlink data delivery status event subscription is received, or reports the indication information that the data description information is received, and the V-SMF can It is determined that the PCC applies to the PDU session, and when the V-SMF determines that the data needs to be cached in the UPF, it can also determine that the received event subscription needs to be reported to the second SMF and a policy for processing the data in the UPF is requested.
  • the V-SMF may assign a transaction identifier (Transaction Id) to the event, and the transaction identifier is used to represent a transaction between the V-SMF and the second SMF for subsequent modification and deletion operations.
  • the transaction identifier may also be referred to as first identifier information.
  • the transaction identifier corresponds to the subscription of the first event, and the transaction identifier may also be used to identify a policy rule request for subscription to the first event.
  • the transaction identifier corresponds to the subscription of the downlink data delivery status event.
  • the V-SMF may also allocate downlink data delivery status indication information according to the event subscription in step 605, and the downlink data delivery status indication information is used to indicate that the received event subscription type is downlink data delivery status subscription.
  • the downlink data delivery state indication information is also called event subscription type indication information in this embodiment, and is used to indicate the type of event subscription.
  • the event subscription type indication information is generated according to the event subscription.
  • the V-SMF sends an Nsmf_PDUSession_Update Request message to the second SMF, reporting the received event subscription, and requesting a policy for detecting data.
  • the message carries triple information, the above transaction identifier (Transaction Id) and the above downlink data delivery status indication information.
  • the message may also be referred to as a second message.
  • the second SMF sends a seventh message to the PCF:
  • the second message received by the second SMF includes both the triplet information and the transaction identifier.
  • the second SMF After receiving the transaction identifier, the second SMF needs to request the PCF for the PCC rules that can be reached after the downlink data delivery fails. Since the PCF previously provided the PCRT that carries the downlink data delivery status event subscription with the data description, the second SMF can send the Npcf_SMPolicyControl_Update request to the PCF information.
  • the message may also be referred to as the seventh message.
  • the seventh message is used to request the PCC rule from the PCF.
  • the second SMF determines that the message is used to request the PCC rule for detecting the downlink data delivery status event according to the downlink data delivery status indication information in the second message, and the second SMF can find out the corresponding event received in step 601 PCRT.
  • the message carries the triplet information received in step 610, the downlink data delivery status indication information, and the PCRT.
  • the message may also carry an operation indication Create, indicating that the message is used to request a new PCC rule.
  • PCF formulates a PCC rule (PCC rule) according to the triplet information received in step 611, that is, the triplet information is included in the filter template in the PCC rule, and a high priority is set, and the PCC rule includes the PCC rule identifier (PCC rule Id), the PCC rule identifier is used to represent the PCC rule.
  • PCC rule Id PCC rule identifier
  • the PCC rule identifier is used to represent the PCC rule.
  • the PCC rule identifier may also be referred to as second identifier information.
  • the PCF may also determine the downlink data delivery state notification control indication information according to the PCRT received in step 611, and the downlink data delivery state notification control indication information is used to indicate that the downlink data delivery state notification needs to be performed.
  • the downlink data delivery status notification control indication information may be included in the PCC rule, to indicate that the PCC rule is used to detect downlink data delivery status events.
  • the downlink data delivery state notification control indication information is also referred to as notification control indication information in this embodiment.
  • the downlink data delivery state notification control indication information may not be included in the PCC rule, but carried in the confirmation message, which is not specifically limited here.
  • the second SMF receives the third policy rule, generates first N4 information (N4 information), and sends the first policy rule to the V-SMF:
  • the second SMF receives the PCC rule (third policy rule) in step 612
  • the PCC rule is generated according to the triplet information
  • the second SMF can determine and save the correspondence between the transaction identifier and the PCC rule identifier accordingly.
  • the PCC rule identifier corresponding to the event can be found according to the corresponding relationship, so as to issue a corresponding instruction to the PCF to make the PCF update or delete the PCC rule identifier corresponding to the PCC rule identifier.
  • the second SMF determines the first N4 information carrying the first PDR according to the PCC rule.
  • the PCC rule or the confirmation message in step 612 includes downlink data delivery state notification control indication information, so the first N4 information may also include downlink data delivery state notification control indication information, and the first PDR is determined according to the above PCC rule, which is the same as the above.
  • PCC rules carry the same priority information and filter templates.
  • the second SMF returns an acknowledgement message to the V-SMF, and the message carries the above-mentioned first N4 information.
  • the first N4 information generated during the event subscription process may also be referred to as the first policy rule.
  • the downlink data delivery state notification control indication information may not be included in the first N4 information, but carried in the above-mentioned confirmation message, which is not specifically limited here.
  • the V-SMF sends the second N4 information (second policy rule) to the UPF:
  • the V-SMF can determine that the first N4 information is used to detect downlink data delivery status events;
  • the V-SMF determines the second N4 information according to the first N4 information. details as follows:
  • the V-SMF can determine the second PDR according to the first PDR.
  • the second PDR is generated according to the above-mentioned first PDR, and includes the same filter template and priority information as the above-mentioned first PDR.
  • the V-SMF may determine the associated FAR according to the DDN Failure notification control indication information and the second PDR.
  • the FAR is used to instruct the UPF to drop and report packets matching the second PDR.
  • the V-SMF When the V-SMF receives the AMF's notification that the UE is in the idle state, the V-SMF can determine the second PDR according to the first PDR, and the second PDR is generated according to the above-mentioned first PDR, including the same filtering as the above-mentioned first PDR. server template and priority information.
  • the V-SMF may determine the associated FAR and URR according to the DDN Failure notification control indication information and the second PDR.
  • the FAR is used to instruct the UPF to discard the buffered data that matches the second PDR
  • the URR is used to instruct the UPF to report when the buffered data packets that match the second PDR are discarded.
  • the FAR is used to instruct the UPF to cache the data packets matching the PDR
  • the URR is used to instruct the UPF to notify the SMF when the data packets are cached, which is not specifically limited here.
  • the first PDR may be directly used as the second PDR, and the second PDR may also be generated in other ways, such as format conversion of the first PDR to generate the second PDR, which is not specifically described here. limited.
  • the V-SMF sends the second N4 information (N4 information) to the UPF, where the second N4 information includes the above-mentioned second PDR, FAR and URR.
  • the second N4 information generated during the event subscription process may also be referred to as the second policy rule.
  • the V-SMF determines that a policy rule for processing data needs to be requested, and sends a second message to the second SMF:
  • the V-SMF receives the indication information that the policy and charging control is applied to the UE, reports the indication information that the downlink data delivery status event subscription is received, or reports the indication information that the data description information is received, and the V-SMF can It is determined that the PCC applies to the PDU session, and when the V-SMF determines that the data needs to be cached in the UPF, it can also determine that the received event subscription needs to be reported to the second SMF and a policy for processing the data in the UPF is requested.
  • the V-SMF may assign a transaction identifier (Transaction Id) to the event, and the transaction identifier is used to represent a transaction between the V-SMF and the second SMF for subsequent modification and deletion operations.
  • the transaction identifier may also be referred to as first identifier information.
  • the transaction identifier corresponds to the subscription of the first event, and the transaction identifier may also be used to identify a policy rule request for subscription to the first event.
  • the transaction identifier corresponds to the subscription of the downlink data delivery status event.
  • the V-SMF sends an Nsmf_PDUSession_Update Request message to the second SMF, reporting the received event subscription, and requesting a policy for detecting data.
  • the message carries the triplet information and the above transaction identifier (Transaction Id).
  • the message may also be referred to as a second message.
  • the second SMF sends a seventh message to the PCF:
  • the second message received by the second SMF includes both the triplet information and the transaction identifier.
  • the second SMF After receiving the transaction identifier, the second SMF needs to request the PCF for the PCC rules that can be reached after the downlink data delivery fails. Since the PCF previously provided the PCRT that carries the downlink data delivery status event subscription with the data description, the second SMF can send the Npcf_SMPolicyControl_Update request to the PCF information.
  • the message may also be referred to as the seventh message.
  • the seventh message is used to request the PCC rule from the PCF.
  • the message carries the triplet information and PCRT received in step 610 .
  • the message may also carry an operation indication Create, indicating that the message is used to request a new PCC rule.
  • the PCF formulates the PCC rule, and sends the third policy rule to the second SMF:
  • PCF formulates a PCC rule (PCC rule) according to the triplet information received in step 611, that is, the triplet information is included in the filter template in the PCC rule, and a high priority is set, and the PCC rule includes the PCC rule identifier (PCC rule Id), the PCC rule identifier is used to represent the PCC rule.
  • PCC rule Id PCC rule identifier
  • the PCC rule identifier is used to represent the PCC rule.
  • the PCC rule identifier may also be referred to as second identifier information.
  • the PCF returns an acknowledgement message to the second SMF, and the message carries the above PCC rule.
  • the PCC rule generated during the event subscription process may also be referred to as a third policy rule.
  • the second SMF receives the third policy rule, generates first N4 information (N4 information), and sends the first policy rule to the V-SMF:
  • the second SMF receives the PCC rule (third policy rule) in step 612
  • the PCC rule is generated according to the triplet information
  • the second SMF can determine and save the correspondence between the transaction identifier and the PCC rule identifier accordingly.
  • the PCC rule identifier corresponding to the event can be found according to the corresponding relationship, so as to issue a corresponding instruction to the PCF to make the PCF update or delete the PCC rule identifier corresponding to the PCC rule identifier.
  • the second SMF determines the first N4 information carrying the first PDR according to the PCC rule.
  • the first PDR is determined according to the aforementioned PCC rule, and carries the same priority information and filter template as the aforementioned PCC rule.
  • the second SMF returns a confirmation message to the V-SMF, and the message carries the above-mentioned first N4 information and transaction identifier.
  • the first N4 information generated during the event subscription process may also be referred to as the first policy rule.
  • the V-SMF sends the second N4 information (second policy rule) to the UPF:
  • the V-SMF can subscribe and associate the first N4 information in the message with the downlink data delivery status event according to the transaction identifier in the message in step 613, and determine the first N4 information in the message to subscribe to the downlink data delivery status event.
  • An N4 message is used to detect downlink data transfer status events.
  • the V-SMF can determine the second PDR according to the first PDR.
  • the second PDR is generated according to the above-mentioned first PDR, and includes the same filter template and priority information as the above-mentioned first PDR.
  • the V-SMF may determine the associated FAR according to the subscription of the downlink data delivery status event and the second PDR.
  • the FAR is used to instruct the UPF to drop and report packets matching the second PDR.
  • the V-SMF When the V-SMF receives the AMF's notification that the UE is in the idle state, the V-SMF can determine the second PDR according to the first PDR, and the second PDR is generated according to the above-mentioned first PDR, including the same filtering as the above-mentioned first PDR. server template and priority information.
  • the V-SMF may determine the associated FAR and URR according to the subscription of the downlink data delivery status event and the second PDR.
  • the FAR is used to instruct the UPF to discard the buffered data that matches the second PDR
  • the URR is used to instruct the UPF to report when the buffered data packets that match the second PDR are discarded.
  • the FAR is used to instruct the UPF to cache the data packets matching the PDR
  • the URR is used to instruct the UPF to notify the SMF when the data packets are cached, which is not specifically limited here.
  • the first PDR may be directly used as the second PDR, and the second PDR may also be generated in other ways, such as format conversion of the first PDR to generate the second PDR, which is not specifically described here. limited.
  • the UPF informs the V-SMF that the matched data packets are discarded:
  • the UPF After the UPF discards the data packets matching the PDR according to the above FAR, it notifies the V-SMF according to the above URR that the matched data packets are discarded.
  • the V-SMF sends a notification request message to the NEF:
  • the V-SMF When the V-SMF receives the notification that the data packet sent by the UPF is discarded, the V-SMF can send the notification that the data packet is discarded to the NEF.
  • the V-SMF When the above-mentioned transmission state is buffering, when the V-SMF receives the notification that the data packet is buffered sent by the UPF, the V-SMF can send the notification that the data packet is buffered to the NEF.
  • the V-SMF detects that the PDU session becomes ACTIVE, that is, confirms that the UE is reachable, and receives the notification that the data packet is buffered in step 615, the UPF will automatically forward the previously buffered data.
  • the V-SMF can determine that the previously buffered data packets are delivered, and send a notification to the NEF that the data packets are delivered.
  • the V-SMF may first send the above notification to the second SMF, and then the second SMF reports to the NEF, which is not specifically limited here.
  • the event of discarding data or caching data in step 615 may also be referred to as a second event, and the first SMF may determine the first event according to the second event.
  • the downlink data delivery state event may be determined according to the event of discarding data or buffering data.
  • the NEF may also be called an event receiving network element, and the event receiving network element is used to receive a report related to the first event, which is a report of a downlink data delivery state event in this embodiment.
  • the NEF sends the Nneff_EventExposure_Notify Request message to the AF, which carries the event identifier and the AF notification endpoint.
  • the PCC rule can be requested not only by the first SMF, but also by the second SMF to request the PCC rule.
  • the process of requesting the PCC rule from the PCF by the second SMF will be described below:
  • a process for providing policy rules in the embodiment of the present application includes:
  • Steps 701 to 705 are similar to steps 601 to 605 in the embodiment shown in FIG. 6 , and are not repeated here.
  • the V-SMF returns a confirmation message to the second SMF:
  • the V-SMF allocates an SMF subscription correlation id (SMF subscription correlation id) according to the event identifier received in step 705, and the SMF subscription correlation id is used to identify the downlink data delivery status event, indicating that the event has been successfully subscribed at the V-SMF.
  • SMF subscription correlation id SMF subscription correlation id
  • the V-SMF determines that the UPF buffers the data, and the V-SMF may generate an indication that the UPF buffers the data or an indication to request the PCC.
  • the V-SMF saves the received information, and returns a confirmation message to the second SMF, where the message carries the above-mentioned SMF subscription-related identifier and the above-mentioned indication of the UPF cached data or an indication of requesting the PCC.
  • Steps 707 to 709 are similar to steps 607 to 609 in the embodiment shown in FIG. 6 , and are not repeated here.
  • step 707 may also be performed before step 705 or 706, as long as it is performed after step 704; step 708 may also be performed before any step between steps 704 to 707, as long as it is performed after step 703 It is enough to execute; step 709 can also be executed before any step between steps 703 to 708, as long as it is executed after step 702, which is not specifically limited here.
  • steps 710 to 713 There are two implementation manners for steps 710 to 713, as follows:
  • the message carries the notification control indication information, which is used to generate the corresponding policy rule.
  • the specific implementation method is as follows:
  • the second SMF determines that a policy rule for processing data needs to be requested, and sends an update request message to the PCF:
  • the second SMF may determine that the PCF needs to be requested for PCC rules due to the receipt of the indication of the UPF to cache the data or the request of the PCC in step 706 .
  • the PCF previously provided the PCRT carrying the downlink data delivery status event subscription with the data description, and the second SMF may send an Npcf_SMPolicyControl_Update request to the PCF to request a policy rule for processing data.
  • the message carries the triplet information received in step 704 and the PCRT that carries the downlink data delivery status event subscription described by the data.
  • the PCRT may also be referred to as event subscription type indication information, and the event subscription type indication information is used to indicate the type of event subscription.
  • the message may also carry an operation indication Create, indicating that the message is used to request a new PCC rule.
  • step 710 may also be performed before any step between steps 707 to 709, as long as it is performed after step 706, which is not specifically limited here.
  • the PCF formulates the PCC rule, and sends the third policy rule to the second SMF:
  • step 711 is similar to the implementation manner of step 612 in FIG. 6 , and details are not described herein again.
  • the second SMF receives the third policy rule, generates first N4 information (N4 information), and sends the first policy rule to the V-SMF:
  • the second SMF receives the PCC rule (the third policy rule) in step 711, because the PCC rule is generated according to the triplet information in the message in step 710, and the triplet information and the subscription of the downlink data delivery status event Correlation, the second SMF assigns the SMF subscription association identifier to the subscription of the event, so the second SMF can determine and save the correspondence between the SMF subscription association identifier and the PCC rule identifier accordingly.
  • the PCC rule identifier corresponding to the event can be found according to the corresponding relationship, so as to issue a corresponding instruction to the PCF to make the PCF update or delete the PCC rule identifier corresponding to the PCC rule identifier.
  • PCC rules the third policy rule
  • the second SMF determines the first N4 information carrying the first PDR according to the PCC rule.
  • the PCC rule or confirmation message in step 711 includes PCRT, so the first N4 information may also include PCRT.
  • the first PDR is determined according to the above PCC rule, and carries the same priority information and filter template as the above PCC rule.
  • the second SMF returns an acknowledgement message to the V-SMF, and the message carries the above-mentioned first N4 information.
  • the first N4 information generated during the event subscription process may also be referred to as the first policy rule.
  • the PCRT may not be included in the first N4 information, but is carried in the above-mentioned confirmation message, which is not specifically limited here.
  • the V-SMF sends the second N4 information (second policy rule) to the UPF:
  • step 713 The implementation manner of A in step 713 is similar to the implementation manner of A in step 614 in the example implemented in FIG. 6 , and details are not repeated here.
  • the second SMF determines that a policy rule for processing data needs to be requested, and sends an update request message to the PCF:
  • the second SMF may determine that the PCF needs to be requested for PCC rules due to the receipt of the indication of the UPF to cache the data or the request of the PCC in step 706 .
  • the PCF previously provided the PCRT carrying the downlink data delivery status event subscription with the data description, and the second SMF may send an Npcf_SMPolicyControl_Update request to the PCF to request a policy rule for processing data.
  • the message carries the triplet information received in step 704 and the PCRT that carries the downlink data delivery status event subscription described by the data.
  • the PCF formulates the PCC rule, and sends the third policy rule to the second SMF:
  • step 711 The implementation manner of B of step 711 is similar to the implementation manner of B of step 612 in the example implemented in FIG. 6 , and details are not repeated here.
  • the second SMF receives the third policy rule, generates first N4 information (N4 information), and sends the first policy rule to the V-SMF:
  • the second SMF receives the PCC rule (third policy rule) in step 711, because the PCC rule is generated according to the triplet information in the message in step 710, and the triplet information is related to the subscription of the downlink data transmission status event Correlation, the second SMF assigns the SMF subscription association identifier to the subscription of the event, so the second SMF can determine and save the correspondence between the SMF subscription association identifier and the PCC rule identifier accordingly.
  • the PCC rule identifier corresponding to the event can be found according to the corresponding relationship, so as to issue a corresponding instruction to the PCF to make the PCF update or delete the PCC rule identifier corresponding to the PCC rule identifier.
  • PCC rules are examples of the PCC rule.
  • the second SMF determines the first N4 information carrying the first PDR according to the PCC rule.
  • the first PDR is determined according to the aforementioned PCC rule, and carries the same priority information and filter template as the aforementioned PCC rule.
  • the second SMF returns an acknowledgement message to the V-SMF, and the message carries the above-mentioned first N4 information.
  • the first N4 information generated during the event subscription process may also be referred to as the first policy rule.
  • the V-SMF sends the second N4 information (second policy rule) to the UPF:
  • step 713 The implementation manner of B in step 713 is similar to the implementation manner of B in step 614 in the example implemented in FIG. 6 , and details are not repeated here.
  • Steps 714 to 716 are similar to steps 615 to 617 in the embodiment shown in FIG. 6 , and are not repeated here.
  • the embodiment of the present application also provides updating and deleting events after the subscription is successful. Next, the process of updating and deleting is described:
  • the present embodiment provides a process for obtaining the corresponding policy rule when the above event is updated.
  • the V-SMF Just replace it with I-SMF, which is not limited here.
  • the process includes:
  • the UE accesses the network and establishes a PDU session:
  • the AF has completed the subscription to the downlink data transmission status event according to the embodiment shown in FIG. 6 .
  • AF sends a subscription request message to NEF:
  • the AF sends the Nnef_EventExposure_Subscribe Request message to the NEF, requesting to update the downlink data delivery status event subscription.
  • the message carries the NEF subscription association identifier and the updated triplet information.
  • the triplet information will be used to replace the triplet information at the time of the original subscription, and a policy rule corresponding to the triplet information will be generated.
  • the triplet information is also referred to as second data description information or second description information.
  • the NEF subscription association identifier is generated by the NEF during the event subscription process.
  • the NEF sends a subscription request message to the UDM:
  • the NEF sends the Nudm_EventExposure_Subscribe Request message to the UDM, requesting to update the downlink data delivery status event subscription.
  • the message carries the UDM subscription association identifier and the triplet information received in step 802a.
  • the UDM subscription association identifier is generated by the UDM during the event subscription process.
  • the UDM sends a subscription request message to the second SMF:
  • the UDM sends a Namf_EventExposure_Subscribe Request message to the second SMF, requesting to update downlink data transmission status events.
  • the message carries the SMF subscription association identifier and the triplet information received in step 803 .
  • the SMF subscription association identifier is the same as that allocated by the second SMF in step 607 in the embodiment shown in FIG. 6 .
  • the second SMF sends a third message to the V-SMF registered by the UE:
  • the V-SMF returns a confirmation message to the second SMF:
  • the UDM After receiving the confirmation message sent by the second SMF, the UDM determines that the subscription event is a downlink data transmission state event according to the UDM subscription association identifier received in step 803, updates the subscription information of the event according to the triplet information, and returns a confirmation to the NEF information.
  • NEF returns a confirmation message to AF:
  • the NEF After receiving the confirmation message sent by the UDM, the NEF determines that the subscription event is a downlink data transmission state event according to the NEF subscription association identifier received in step 802a, updates the subscription information of the event according to the triplet information, and returns a confirmation message to the AF.
  • steps 810a to 814a There are two implementations of steps 810a to 814a, as follows:
  • the message carries the notification control indication information, which is used to generate the corresponding policy rule.
  • the specific implementation method is as follows:
  • the V-SMF sends a fourth message to the second SMF:
  • the V-SMF can determine the downlink data notification status event according to the SMF subscription association identifier in the third message, and determine according to the message that the subscription of the event needs to be updated.
  • the SMF subscription association identifier may also be referred to as a third identifier, which is used to identify the subscription of the first event.
  • the V-SMF sends an Nsmf_PDUSession_Update Request message to the second SMF, where the message is used to request to update the first N4 information.
  • the message may also be referred to as a fourth message.
  • the fourth message is used to request the second SMF to update the policy rule for processing data corresponding to the subscription event.
  • the message carries triple information, transaction identifier and downlink data transmission status indication information.
  • the downlink data transmission status indication information is also called event subscription type indication information, which is generated during the event subscription process and is used to indicate the first event.
  • the second SMF sends an eighth message to the PCF:
  • the second SMF saves the correspondence between the transaction identifier and the PCC rule identifier, and at this time, the second SMF can determine the corresponding PCC rule identifier according to the transaction identifier.
  • the message may also carry an operation indication Modify, indicating that the message is used to request an updated PCC rule.
  • the PCF updates the PCC rule according to the triplet information, and sends the fifth policy rule to the second SMF:
  • the PCF updates the PCC rule according to the triplet information, that is, the triplet information is included in the filter template in the PCC rule.
  • the PCC rule may include downlink data transmission state notification control indication information.
  • the downlink data transmission status notification control indication information is generated in the process of event subscription, and the PCF can determine the indication information according to the corresponding relationship between the indication information and the PCC rule identifier; the downlink data transmission status notification control indication information can also be the PCF according to the above
  • the downlink data transmission status indication information is generated, which is not specifically limited here.
  • the PCF returns an acknowledgement message to the second SMF, and the message carries the updated PCC rule.
  • the PCC rule generated during the event subscription process may also be referred to as a third policy rule.
  • the downlink data transmission state notification control indication information may also be carried in the confirmation message, which is not specifically limited here.
  • the second SMF updates the first N4 information (N4 information), and sends the fourth policy rule to the V-SMF:
  • the second SMF updates the first N4 information carrying the first PDR according to the PCC rule.
  • the first N4 information also includes downlink data transmission state notification control indication information, and the first PDR is determined according to the above PCC rule, and carries the same priority information and filter template as the above PCC rule.
  • the second SMF returns an acknowledgement message to the V-SMF, and the message carries the above-mentioned first N4 information.
  • the downlink data transmission state notification control indication information may also be carried in the confirmation message, which is not specifically limited here.
  • the V-SMF determines that the first N4 information is used to detect downlink data transmission status events.
  • the V-SMF determines the second N4 information according to the first N4 information.
  • the V-SMF determines the second N4 information according to the first N4 information. details as follows:
  • the V-SMF can determine the second PDR according to the first PDR.
  • the second PDR is generated according to the above-mentioned first PDR, and includes the same filter template and priority information as the above-mentioned first PDR.
  • the V-SMF may determine the associated FAR according to the downlink data transmission state notification control indication information and the second PDR.
  • the FAR is used to instruct the UPF to drop and report packets matching the second PDR.
  • the V-SMF When the V-SMF receives the AMF's notification that the UE is in the idle state, the V-SMF can determine the second PDR according to the first PDR, and the second PDR is generated according to the above-mentioned first PDR, including the same filtering as the above-mentioned first PDR. server template and priority information.
  • the V-SMF may determine the associated FAR and URR according to the downlink data transmission state notification control indication information and the second PDR.
  • the FAR is used to instruct the UPF to discard the buffered data that matches the second PDR
  • the URR is used to instruct the UPF to report when the buffered data packets that match the second PDR are discarded.
  • the FAR is used to instruct the UPF to cache the data packets matching the PDR
  • the URR is used to instruct the UPF to notify the SMF when the data packets are cached, which is not specifically limited here.
  • the first PDR may be directly used as the second PDR, and the second PDR may also be generated in other ways, such as format conversion of the first PDR to generate the second PDR, which is not specifically described here. limited.
  • the V-SMF sends the second N4 information (N4 information) to the UPF, where the second N4 information includes the above-mentioned second PDR, FAR and URR.
  • the second N4 information generated during the event subscription process may also be referred to as the second policy rule.
  • the V-SMF determines that a request to update the policy rule for processing data needs to be requested, and sends a fourth message to the second SMF:
  • the V-SMF can determine the downlink data delivery status event according to the SMF subscription association identifier in the third message, and determine the subscription of the event needs to be updated according to the message.
  • the SMF subscription association identifier may also be referred to as a third identifier, which is used to identify the subscription of the first event.
  • the V-SMF sends an Nsmf_PDUSession_Update Request message to the second SMF, where the message is used to request to update the first N4 information.
  • the message may also be referred to as a fourth message.
  • the message carries triple information and transaction identifier.
  • the transaction identifier is generated when the event is subscribed, and is used to represent the event between the first SMF and the second SMF, and specifically corresponds to the subscription of the downlink data delivery state event in this embodiment.
  • the second SMF sends an eighth message to the PCF:
  • the second SMF saves the correspondence between the transaction identifier and the PCC rule identifier, and at this time, the second SMF can determine the corresponding PCC rule identifier according to the transaction identifier.
  • the second SMF sends an Npcf_SMPolicyControl_Update request message to the PCF, where the message is used to request to update the PCC rule corresponding to the above-mentioned PCC rule identifier.
  • the message may also be referred to as the eighth message.
  • the message carries triple information and PCC rule identifier.
  • the message may also carry an operation indication Modify, indicating that the message is used to request an updated PCC rule.
  • the PCF updates the PCC rule according to the triplet information, and sends the fifth policy rule to the second SMF:
  • the PCF updates the PCC rule according to the triplet information, that is, the triplet information is included in the filter template in the PCC rule.
  • the PCF returns an acknowledgement message to the second SMF, and the message carries the updated PCC rule.
  • the PCC rule generated during the event update process may also be referred to as the fifth policy rule.
  • the second SMF updates the first N4 information carrying the first PDR according to the PCC rule.
  • the first PDR is determined according to the aforementioned PCC rule, and carries the same priority information and filter template as the aforementioned PCC rule.
  • the PCC rule received by the second SMF includes the PCC rule identifier. Since the second SMF saves the correspondence between the PCC rule identifier and the transaction identifier when subscribing, the second SMF can use the PCC rule The identifier determines the transaction identifier corresponding to the PCC rule.
  • the second SMF returns a confirmation message to the V-SMF, and the message carries the above-mentioned first N4 information and transaction identifier.
  • the first N4 information generated during the event update process may also be referred to as the fourth policy rule.
  • the V-SMF may associate the first N4 information with the subscription of the downlink data notification status event according to the transaction identifier received in step 813a, and determine that the first N4 information is used to detect the downlink data notification status event.
  • the V-SMF determines the second N4 information according to the first N4 information and the subscription of the downlink data notification status event.
  • the V-SMF can determine the second PDR according to the first PDR.
  • the second PDR is generated according to the above-mentioned first PDR, and includes the same filter template and priority information as the above-mentioned first PDR.
  • the V-SMF may determine the associated FAR according to the downlink data notification failure event subscription and the second PDR.
  • the V-SMF When the V-SMF receives the AMF's notification that the UE is in the idle state, the V-SMF can determine the second PDR according to the first PDR, and the second PDR is generated according to the above-mentioned first PDR, including the same filtering as the above-mentioned first PDR. server template and priority information.
  • the V-SMF may determine the associated FAR and URR according to the downlink data notification failure event subscription and the second PDR.
  • the FAR is used to instruct the UPF to discard the buffered data that matches the second PDR
  • the URR is used to instruct the UPF to report when the buffered data packets that match the second PDR are discarded.
  • the first PDR may be directly used as the second PDR, and the second PDR may also be generated in other ways, such as format conversion of the first PDR to generate the second PDR, which is not specifically described here. limited.
  • the V-SMF sends the second N4 information (N4 information) to the UPF, where the second N4 information includes the above-mentioned second PDR, FAR and URR.
  • the second N4 information generated during the event subscription process may also be referred to as the second policy rule.
  • Steps 815a to 817a are similar to steps 615 to 617 in the embodiment shown in FIG. 6 , and are not repeated here.
  • the present embodiment provides a process for obtaining the corresponding policy rule when the above event is updated. Just replace it with I-SMF, which is not limited here.
  • the process includes:
  • the UE accesses the network and establishes a PDU session:
  • the AF has completed the subscription to the downlink data transmission status event according to the embodiment shown in FIG. 7 .
  • Steps 802b to 809b are similar to steps 802a to 809a of the example implemented in FIG. 8a, and are not repeated here.
  • step 807b may also be performed before step 805b or step 806b, as long as it is performed after step 804b; step 808b may also be performed before any of steps 804b to 807b, as long as it is performed after step 803b. Yes; step 809b can also be performed before any of steps 803b to 808b, as long as it is performed after step 802b, which is not limited here.
  • steps 810b to 813b There are two implementations of steps 810b to 813b, as follows:
  • the message carries the notification control indication information, which is used to generate the corresponding policy rule.
  • the specific implementation method is as follows:
  • the second SMF determines that a request to update the policy rule for processing data needs to be requested, and sends an update request message to the PCF:
  • the message received by the second SMF carries the SMF subscription association identifier, and the second SMF can determine the downlink data delivery status event according to the identifier, and determine that the subscription of the event needs to be updated according to the message.
  • the SMF subscription association identifier may also be referred to as a third identifier, which is used to identify the subscription of the first event.
  • the second SMF saves the correspondence between the SMF subscription association identifier and the PCC rule identifier, and the second SMF can determine the corresponding PCC rule identifier according to the SMF subscription association identifier.
  • the second SMF sends an Npcf_SMPolicyControl_Update request message to the PCF, where the message is used to request to update the PCC rule corresponding to the above-mentioned PCC rule identifier.
  • the message carries triple information, PCC rule identifier, and downlink data transmission status indication information received during the event subscription process.
  • the message may also carry an operation indication Modify, indicating that the message is used to request an updated PCC rule.
  • step 810b may also be performed before any of steps 805b to 809b, as long as it is performed after step 804b or 806b, which is not limited here.
  • step 810b If step 810b is performed after step 806b, the second SMF in step 806b can determine that the V-SMF has completed the update of the event, and it is more secure to request the update from the PCF at this time.
  • the PCF updates the PCC rule according to the triplet information, and sends the fifth policy rule to the second SMF:
  • step 811b The implementation manner of A in step 811b is similar to the implementation manner of A in step 812a in the example implemented in FIG. 8a, and details are not described herein again.
  • the second SMF updates the first N4 information (N4 information), and sends the fourth policy rule to the V-SMF:
  • the second SMF updates the first N4 information carrying the first PDR according to the PCC rule.
  • the first PDR is determined according to the aforementioned PCC rule, and carries the same priority information and filter template as the aforementioned PCC rule.
  • the PCC rule received by the second SMF includes the PCC rule identifier. Since the second SMF saves the correspondence between the PCC rule identifier and the SMF subscription association identifier when subscribing, the second SMF can The PCC rule identifier determines the SMF subscription association identifier corresponding to the PCC rule.
  • the second SMF returns a confirmation message to the V-SMF, where the message carries the above-mentioned first N4 information and the SMF subscription association identifier.
  • the first N4 information generated during the event update process may also be referred to as the fourth policy rule.
  • step 810b may also be performed before any of steps 805b to 809b, as long as it is performed after step 804b or 806b, which is not limited here.
  • step 810b If step 810b is performed after step 806b, the second SMF in step 806b can determine that the V-SMF has completed the update of the event, and it is more secure to request the update from the PCF at this time.
  • step 811b to step 813b is similar to the implementation manner of step 812a to 814a in FIG. 8a, and details are not described here.
  • the second SMF determines that a request to update the policy rule for processing data needs to be requested, and sends an update request message to the PCF:
  • the message received by the second SMF carries the SMF subscription association identifier, and the second SMF can determine the downlink data delivery status event according to the identifier, and determine that the subscription of the event needs to be updated according to the message.
  • the SMF subscription association identifier may also be referred to as a third identifier, which is used to identify the subscription of the first event.
  • the second SMF saves the correspondence between the SMF subscription association identifier and the PCC rule identifier, and the second SMF can determine the corresponding PCC rule identifier according to the SMF subscription association identifier.
  • the second SMF sends an Npcf_SMPolicyControl_Update request message to the PCF, where the message is used to request to update the PCC rule corresponding to the above-mentioned PCC rule identifier.
  • the message carries triple information and PCC rule identifier.
  • Steps 814b to 816b are similar to steps 714 to 716 in the embodiment shown in FIG. 7 , and are not repeated here.
  • the present embodiment provides a process of deleting the event subscription when the above event is deleted.
  • the V-SMF is replaced. It is enough to be I-SMF, which is not limited here.
  • the process includes:
  • the UE accesses the network and establishes a PDU session:
  • the AF sends a de-subscription request message to the NEF:
  • AF sends Nnef_EventExposure_Unsubscribe Request message to NEF, requesting to delete event subscription.
  • the message carries the NEF subscription association identifier received during the event subscription process.
  • the NEF sends the Nudm_EventExposure_Unsubscribe Request message to the UDM to request to delete the event subscription.
  • the UDM sends an unsubscribe request message to the second SMF registered by the UE:
  • the UDM sends a Nsmf_EventExposure_Unsubscribe Request message to the second SMF registered by the UE, requesting to delete the event subscription.
  • the message carries the AMF subscription association identifier received during the event subscription process.
  • the second SMF sends an unsubscribe request message to the V-SMF:
  • the second SMF sends a Nsmf_EventExposure_Unsubscribe Request message to the V-SMF registered by the UE, requesting to delete the event subscription.
  • the message carries the AMF subscription association identifier received during the event subscription process.
  • the second SMF returns a confirmation message to the UDM.
  • the NEF returns a confirmation message to the AF.
  • the V-SMF can determine the downlink data delivery status event according to the SMF subscription association identifier in the de-subscription request in step 905a, and determine the subscription of the event needs to be deleted according to the request, thereby determining that the first N4 information needs to be requested to be deleted.
  • the SMF subscription association identifier may also be referred to as a third identifier, which is used to identify the subscription of the first event.
  • the V-SMF saves the correspondence between the event subscription and the transaction ID, and at this time, the transaction ID corresponding to the event subscription can be queried.
  • the V-SMF sends an Nsmf_PDUSession_Update Request message to the SMF, and the message carries an instruction for requesting to delete the first N4 information.
  • the message is also called a sixth message, and the sixth message is used to request deletion of the first N4 information.
  • the message carries the transaction identifier and the operation instruction delete.
  • Steps 911a to 914 are similar to steps 511a to 514a in the embodiment shown in FIG. 5a, and are not repeated here.
  • the present embodiment provides a process of deleting the event subscription when the above event is deleted.
  • the V-SMF is replaced. It is enough to be I-SMF, which is not limited here.
  • the process includes:
  • the UE accesses the network and establishes a PDU session:
  • the AF has completed the subscription to the downlink data transmission status event according to the embodiment shown in FIG. 7 .
  • Steps 902b to 909b are similar to steps 902a to 909a in the example implemented in FIG. 9a, and are not repeated here.
  • the second SMF sends an update request message to the PCF:
  • the second SMF sends an Nsmf_PDUSession_Update Request message to the PCF, requesting to delete the downlink data notification failure event.
  • the message carries an SMF subscription association identifier and a de-subscription indication, and the SMF subscription association identifier is generated by the second SMF when the event is subscribed.
  • Steps 911b to 913b are similar to steps 513b to 515b of the example implemented in FIG. 5a , and are not repeated here.
  • a structure of the session management network element includes:
  • a first receiving unit 1001 is configured to receive a first message, where the first message is used to request the creation of a subscription to a first event, where the subscription to the first event is an event subscription for a user equipment UE, and the first message includes first description information of the data, the data is the data received by the UE;
  • the first sending unit 1002 is configured to send a second message to the second session management network element SMF according to the request policy indication information, where the second message includes the first description information, and the second message is used to request the second session management network element SMF. a first policy rule corresponding to the description information;
  • a second receiving unit 1003, configured to receive the first policy rule sent by the second SMF
  • a first determining unit 1004 configured to determine a second policy rule according to the first policy rule
  • the second sending unit 1005 is configured to send the second policy rule to the user plane function network element UPF, so that the UPF processes the data.
  • another structure of the session management network element includes:
  • a first receiving unit 1101 configured to receive a first message, where the first message is used to request the creation of a subscription to a first event, where the subscription to the first event is an event subscription for a user equipment UE, and the first message includes first description information of the data, the data is the data received by the UE;
  • a second receiving unit 1103, configured to receive the first policy rule sent by the second SMF
  • a first determining unit 1104 configured to determine a second policy rule according to the first policy rule
  • the second sending unit 1105 is configured to send the second policy rule to the user plane function network element UPF, so that the UPF processes the data.
  • a third receiving unit 1106, configured to receive a third message, where the third message is used to request to update the subscription of the first event, and the third message includes second description information of the data;
  • the third sending unit 1107 is configured to send a fourth message to the second SMF, where the fourth message is used to request to update the first policy rule, and the fourth message includes the first identifier and the second description information;
  • a fourth receiving unit 1108, configured to receive a fourth policy rule sent by the second SMF, where the fourth policy rule is a policy rule obtained after updating the first policy rule;
  • a first updating unit 1109 configured to update the second policy rule according to the fourth policy rule.
  • a fifth receiving unit 1110 configured to receive a fifth message, where the fifth message is used to request to delete the subscription of the first event
  • the fourth sending unit 1111 is configured to send a sixth message to the second SMF, where the sixth message is used to request deletion of the first policy rule, and the sixth message includes the first identifier and a deletion indication.
  • the sixth receiving unit 1112 is configured to receive the request policy indication information sent by the second SMF.
  • the second receiving unit 1103 may include a first receiving subunit 11031;
  • a first receiving subunit 11031 configured to receive the first policy rule and notification control indication information sent by the second SMF, where the notification control indication information is determined according to the event subscription type indication information;
  • the first determination unit 1104 may include a first determination subunit 11041 or a second determination subunit 11042;
  • the first determination subunit 11041 is configured to determine the second policy rule according to the first policy rule and the notification control indication information.
  • the second determination subunit 11042 is configured to determine the second policy rule according to the first policy rule and the subscription of the first event.
  • a structure of the session management network element includes:
  • a seventh receiving unit 1201 configured to receive a second message sent by the first session management network element SMF, where the second message includes first description information and event subscription type indication information, where the event subscription type indication information is used to indicate an event Type of subscription, the event subscription is an event subscription for user equipment UE, and the first description information is used to identify data received by the UE;
  • the fifth sending unit 1202 is configured to send a seventh message to the policy control network element PCF, where the seventh message is used to request a third policy rule corresponding to the first description information, and the seventh message includes the first description information and the event subscription type indication information;
  • an eighth receiving unit 1203, configured to receive the third policy rule sent by the PCF
  • a second determining unit 1204 configured to determine the first policy rule according to the third policy rule
  • a sixth sending unit 1205, configured to send the first policy rule to the first SMF.
  • another structure of the session management network element includes:
  • a seventh receiving unit 1301, configured to receive a second message sent by the first session management network element SMF, where the second message includes first description information and event subscription type indication information, where the event subscription type indication information is used to indicate an event Type of subscription, the event subscription is an event subscription for user equipment UE, and the first description information is used to identify data received by the UE;
  • the fifth sending unit 1302 is configured to send a seventh message to the policy control network element PCF, where the seventh message is used to request a third policy rule corresponding to the first description information, and the seventh message includes the first description information and downlink data notification event subscription trigger, the downlink data notification event subscription trigger is determined according to the event subscription type indication information;
  • an eighth receiving unit 1303, configured to receive the third policy rule sent by the PCF
  • a second determining unit 1304, configured to determine the first policy rule according to the third policy rule
  • a sixth sending unit 1305, configured to send the first policy rule to the first SMF.

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Abstract

本申请实施例公开了一种策略规则的提供方法及会话管理网元,用于当SMF无法直接与PCF交互时,获取用于UPF检测数据包的策略规则。本申请实施例方法包括:第一SMF向能与PCF交互的第二SMF发送数据描述信息,第二SMF根据该数据描述信息向PCF获取相应的PCC规则,再生成对应的策略规则发送给第一SMF,使得第一SMF可以根据PCC规则获取用于UPF检测数据包的策略规则。

Description

策略规则的提供方法及会话管理网元
本申请要求于2020年9月29日提交中国专利局、申请号为202011052641.3、发明名称为“策略规则的提供方法及会话管理网元”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
本申请实施例涉及通信领域,尤其涉及一种策略规则的提供方法及会话管理网元。
背景技术
在4G、5G及未来可能出现的通信协议中,会话管理功能(SMF,session management function)的功能之一就是实现用户面和控制面分离,并负责控制面的功能,即为用户面功能(UPF,user plane function)提供策略规则。
当应用需要订阅某事件,该事件与应用和UE传输的数据有关,需要UPF检测UE传输的数据包时(譬如订阅的事件为数据包被缓存,则UPF需要缓存数据包,并报告数据包被缓存的事件),SMF需要向PCF请求策略控制和计费(PCC,policy control and charging)规则,根据该PCC规则生成检测数据包状态的策略规则,UPF根据该策略规则实现对相应数据包的检测和事件报告,从而实现该事件订阅的事件报告。
当SMF与PCF无法直接交互时,SMF无法获取PCC规则,SMF也就无法正确制定用于UPF检测数据包的策略规则。例如,在漫游场景下或存在中间会话管理功能(I-SMF,intermediate-SMF)的场景下,由于拜访地会话管理功能(V-SMF,visited-SMF)和I-SMF无法直接与PCF交互,无法获取PCC规则,V-SMF和I-SMF无法正确制定用于UPF检测数据包的策略规则。
发明内容
本申请实施例提供了一种策略规则的提供方法,用于当SMF无法直接与PCF交互时,获取PCC规则,从而获取用于UPF检测数据包的策略规则。
本申请实施例第一方面提供了一种策略规则的提供方法,该方法包括:
在用户设备UE接入网络,建立PDU会话后,应用可以请求创建第一事件的订阅,第一事件与应用和UE传输的数据有关,需要UPF检测UE传输的数据包,该数据包可以包括UE接收的数据。
当应用请求订阅第一事件时,第一会话管理网元SMF可以接收到第一消息,第一消息用于请求创建第一事件的订阅,第一消息中可以包括数据的第一描述信息,该数据为UE接收的数据,在本申请实施例中,第一描述信息也可称为第一数据描述信息;
第一SMF可以根据请求策略指示信息向第二会话管理网元SMF发送第二消息,请求策略指示信息用于指示第一SMF向PCF获取与订阅事件所对应的策略规则,第二消息包括第一描述信息,第二消息用于请求与该第一描述信息对应的第一策略规则;
第一SMF接收第二SMF发送的第一策略规则;
第一SMF根据该第一策略规则确定第二策略规则;
第一SMF向用户面功能网元UPF发送第二策略规则,以使得UPF对上述数据进行处理。
本申请实施例中,无法与PCF直接交互的第一SMF,通过向能与PCF直接交互的第二SMF发送第一描述信息,接收第二SMF根据该第一描述信息生成的第一策略规则,从而生成对应的策略规则。实现第一SMF在无法与PCF直接连接的情况下完成事件的订阅。
结合第一方面,本申请实施例第一方面的第一种实施方式中,还可以实现更新第一事件订阅时,提供相应的策略规则:
具体的,第二消息中还可以包括第一标识,第一标识用于标识第一SMF与第二SMF之间的事务,第一标识对应于第一事件的订阅,可以根据该第一标识确定对应的事务和对应的策略规则;
在第一SMF向第二SMF发送第一消息之后,该方法还包括:
第一SMF接收第三消息,第三消息用于请求更新第一事件的订阅,第三消息包括上述数据的第二描述信息,本申请实施例中,第二描述信息也可称为第二数据描述信息;
第一SMF向第二SMF发送第四消息,第四消息用于请求第二SMF更新上述第一策略规则,第四消息中包括第一标识和第二描述信息;
第一SMF接收第二SMF发送的第四策略规则,第四策略规则为根据上述第二描述信息更新上述第一策略规则后得到的策略规则;
第一SMF根据第四策略规则更新上述第二策略规则,在第一SMF处得到对应于上述第二描述信息的策略规则。
本申请实施例中,第一SMF向第二SMF发送第二描述信息和第一标识,使得第二SMF根据该第二描述信息更新上述第一策略规则,得到第四策略规则,接收第二SMF发送的第四策略规则,从而生成对应于第二描述信息的策略规则。实现在事件订阅完成后,对事件订阅的更新。
结合第一方面的第一种实施方式,本申请实施例第一方面的第二种实施方式中,在第一SMF向第二SMF发送第四消息之后,该方法还包括:
第一SMF接收第十消息,第十消息用于请求更新第一事件的订阅,第十消息包括上述数据的第三描述信息,本申请实施例中,第三描述信息也可称为第三数据描述信息;
第一SMF向第二SMF发送第十一消息,第十一消息用于请求第二SMF更新上述第四策略规则,第十一消息中包括第一标识和第三描述信息;
第一SMF接收第二SMF发送的第六策略规则,第六策略规则为根据上述第三描述信息更新上述第四策略规则后得到的策略规则;
第一SMF根据第六策略规则更新第一SMF处与第一事件相关的策略规则,在第一SMF处得到对应于上述第三描述信息的策略规则。
本申请实施例中,第一SMF向第二SMF发送第三描述信息和第一标识,使得第二SMF根据该第三描述信息更新上述第四策略规则,得到第六策略规则,接收第二SMF发送的第六策略规则,从而生成对应于第三描述信息的策略规则。实现在对事件订阅的更新后,再次对事件订阅的更新。
结合第一方面,本申请实施例第一方面的第三种实施方式中,还可以实现对第一事件订阅的删除:
具体的,第一消息中还可以包括第一标识,第一标识用于标识第一SMF与第二SMF之间的事务,可以根据该第一标识确定对应的事务和对应的策略规则;
具体的,在本实施方式中,第一标识可以表示第一SMF与第二SMF之间的上述第一事件;
第一SMF向第二SMF发送第一消息之后,该方法还包括:
第一SMF接收第五消息,第五消息用于请求删除第一事件的订阅;
第一SMF向第二SMF发送第六消息,第六消息用于请求删除第一策略规则,第六消息包括第一标识和删除指示。
本申请实施例中,第一SMF向第二SMF发送删除指示和第一标识,使得第二SMF根据该删除指示删除上述第一策略规则。实现在事件订阅完成后,对事件订阅的删除。
结合第一方面的第一种实施方式,本申请实施例第一方面的第四种实施方式中,还可以实现对更新后的第一事件订阅的删除:
具体的,第一SMF向第二SMF发送第四消息之后,该方法还包括:
第一SMF接收第十二消息,第十二消息用于请求删除第一事件的订阅;
第一SMF向第二SMF发送第十三消息,第十三消息用于请求删除第四策略规则,第十三消息包括第一标识和删除指示。
本申请实施例中,第一SMF向第二SMF发送删除指示和第一标识,使得第二SMF根据该删除指示删除上述第四策略规则。实现对更新后的事件订阅的删除。
结合第一方面、第一方面的第一种实施方式至第一方面的第四种实施方式中的任一种,本申请实施例第一方面的第五种实施方式中,
第一SMF根据请求策略指示信息向第二SMF发送第二消息之前,该方法还包括:
第一SMF接收第二SMF发送的请求策略指示信息。
本申请实施例中,根据该请求策略指示信息,第一SMF就可以知道需要请求策略指示信息,从而获取第一事件订阅所对应的策略规则。
结合第一方面、第一方面的第一种实施方式至第一方面的第五种实施方式中的任一种,本申请实施例第一方面的第六种实施方式中,
请求策略指示信息包括策略计费控制应用于所述UE的指示信息、报告接收到下行数据通知事件订阅的指示信息或报告接收到的数据描述信息的指示信息中的至少一项。
结合第一方面、第一方面的第一种实施方式至第一方面的第六种实施方式中的任一种,本申请实施例第一方面的第七种实施方式中,
第一消息中还包括事件订阅类型指示信息,事件订阅类型指示信息用于指示第一事件的订阅的类型。
本申请实施例中,根据事件订阅类型指示信息,第二SMF就可以确定第一事件的订阅的类型,在向PCF请求PCC规则时,就可以根据该指示信息确定对应的下行数据通知事件订阅触发器,不需要再通过事件的订阅确定对应的触发器,节省第二SMF的运算资源。
结合第一方面的第七种实施方式,本申请实施例第一方面的第八种实施方式中,
第一SMF接收第二SMF发送的第一策略规则包括:
第一SMF接收第二SMF发送的第一策略规则和通知控制指示信息,通知控制指示信息根据上述事件订阅类型指示信息确定;
第一SMF根据第一策略规则确定第二策略规则包括:
第一SMF根述第一策略规则和上述通知控制指示信息确定第二策略规则。
本申请实施例中,第一SMF可以直接根据第一策略规则和通知控制指示信息确定第二策略规则,不需要确定第一策略规则所对应的第一事件,再根据该第一事件确定第二策略规则,节省了第一SMF的运算资源和时延,提高了效率。
结合第一方面、第一方面的第一种实施方式至第一方面的第七种实施方式中的任一种,本申请实施例第一方面的第九种实施方式中,
第一SMF根据第一策略规则确定第二策略规则包括:
第一SMF根据第一策略规则和第一事件的订阅确定第二策略规则。
本申请实施例中,第一SMF根据第一策略规则和第一事件的订阅确定第二策略规则,不需要在与第二SMF发送和接收的消息中携带事件订阅类型指示信息和通知控制指示信息,节省了网络中需要接发和确定上述两指示信息的网元的运算资源和网络带宽资源。
结合第一方面、第一方面的第一种实施方式至第一方面的第九种实施方式中的任一种,本申请实施例第一方面的第十种实施方式中,
第一SMF向UPF发送第二策略规则之后,该方法还包括:
第一SMF接收UPF对上述数据处理后报告的第二事件;
第一SMF根据第二事件确定第一事件,并向事件接收网元报告第一事件,事件接收网元用于接收与第一事件相关的报告。
结合第一方面的第十种实施方式,本申请实施例第一方面的第十一种实施方式中,
第二事件包括上述数据被缓存的事件或上述数据被丢包的事件。
结合第一方面、第一方面的第一种实施方式至第一方面的第十一种实施方式中的任一种,本申请实施例第一方面的第十二种实施方式中,
第一事件包括下行数据通知失败事件或下行数据传输状态事件。
结合第一方面、第一方面的第一种实施方式至第一方面的第十二种实施方式中的任一种,本申请实施例第一方面的第十三种实施方式中,第一策略规则为第一N4信息。
结合第一方面、第一方面的第一种实施方式至第一方面的第十三种实施方式中的任一种,本申请实施例第一方面的第十四种实施方式中,第二策略规则为第二N4信息。
结合第一方面的第八种实施方式,本申请实施例第一方面的第十五种实施方式中,通知控制指示信息包括在上述第一策略规则中。
本申请实施例中,通知控制指示信息包括在上述第一策略规则中,在转发和根据第一策略规则确定第二策略规则的过程中,通知控制指示信息包括在第一策略规则中,不需要再对通知控制指示信息单独处理,节省设备的运算资源。
结合第一方面的第一种实施方式,本申请实施例第一方面的第十六种实施方式中,第 三消息中还包括第三标识,第三标识用于标识上述第一事件的订阅。
结合第一方面的第十六种实施方式,本申请实施例第一方面的第十七种实施方式中,第三标识是SMF订阅关联标识。
结合第一方面的第一种实施方式至第一方面的第四种实施方式中的任一种,本申请实施例第一方面的第十八种实施方式中,第一标识为事务标识,表示第一SMF和第二SMF之间的事务,对应于第一事件的订阅。
结合第一方面的第十八种实施方式,本申请实施例第一方面的第十九种实施方式中,事务标识为NEF通知关联标识,NEF通知关联标识用于标识上述第一事件的订阅。
本申请实施例第二方面提供了一种策略规则的提供方法,该方法包括:
在用户设备UE接入网络,建立PDU会话后,应用可以请求创建第一事件的订阅,第一事件与应用和UE传输的数据有关,需要UPF检测UE传输的数据包,该数据包可以包括UE接收的数据。
当应用请求订阅第一事件时,第二SMF可以接收到第一SMF发送的第二消息,第二消息包括第一描述信息和事件订阅类型指示信息,事件订阅类型指示信息用于指示事件订阅的类型,即第一事件的类型,第一描述信息用于标识UE接收的数据,在本申请实施例中,第一描述信息也可称为第一数据描述信息;
第二SMF向策略控制网元PCF发送第七消息,第七消息用于请求与上述第一描述信息对应的第三策略规则,第七消息包括第一描述信息和下行数据通知事件订阅触发器,下行数据通知事件订阅触发器根据上述事件订阅类型指示信息确定;
第二SMF接收PCF发送的上述第三策略规则;
第二SMF根据第三策略规则确定第一策略规则;
第二SMF向所述第一SMF发送第一策略规则。
本申请实施例中,能与PCF直接交互的第二SMF接收无法与PCF直接交互的第一SMF发送的第一描述信息和事件订阅类型指示信息,向PCF请求根据该第一描述信息生成的第三策略规则,从而生成对应的第一策略规则,再将第一策略规则发送给第一SMF,使得第一SMF获得根据第三策略规则生成的第一策略规则,由于第三策略规则是PCF生成的,实现了第一SMF根据PCF生成的第三策略规则生成第二策略规则,实现了第一SMF在无法与PCF直接连接的情况下完成事件的订阅。
结合第二方面,本申请实施例第二方面的第一种实施方式中,
第二SMF接收第一SMF发送的第二消息之前,该方法还包括:
第二SMF接收PCF发送的第一请求策略指示信息,第一请求策略指示信息包括报告接收到下行数据通知事件订阅的指示信息;
第二SMF向第一SMF发送第二请求策略指示信息,第二请求策略指示信息包括策略计费控制应用于所述UE的指示信息、上述报告接收到下行数据通知事件订阅的指示信息或报告接收到数据描述信息的指示信息中的至少一项;第二请求策略指示信息用于指示第一SMF获取与订阅事件所对应的策略规则。
本申请实施例中,第二SMF向第一SMF发送第二请求策略指示信息,通知第一SMF向 PCF获取与订阅事件所对应的策略规则,从而使第一SMF通过第二SMF获取PCF生成的策略规则,从而获取事件订阅所需的策略规则。
结合第二方面和第二方面的第一种实施方式,本申请实施例第二方面的第二种实施方式中,
若第二SMF接收PCF发送的第三策略规则包括:
第二SMF接收PCF发送的第三策略规则和通知控制指示信息,通知控制指示信息根据上述下行数据通知事件订阅触发器确定;
则第二SMF向第一SMF发送第一策略规则包括:
第二SMF向第一SMF发送第一策略规则和通知控制指示信息。
本申请实施例中,第二SMF向第一SMF发送第一策略规则的同时还发送了通知控制指示信息,第一SMF可以直接根据第一策略规则和通知控制指示信息确定第二策略规则,不需要确定第一策略规则所对应的第一事件,再根据该第一事件确定第二策略规则,节省了第一SMF的运算资源和时延,提高了效率。
结合第二方面和第二方面的第一种实施方式至第二种实施方式中的任一种,本申请实施例第二方面的第三种实施方式中,还可以实现更新第一事件订阅时,提供相应的策略规则:
第二消息中还包括第一标识,第一标识用于标识第二SMF与所述第一SMF之间的事务,对应于第一事件的订阅;
第二SMF向PCF发送第七消息之后,该方法还包括:
第二SMF接收第一SMF发送的第四消息,第四消息包括第一标识和上述数据的第二描述信息,第四消息用于请求更新上述第一事件的订阅;
第二SMF向PCF发送第八消息,第八消息中包括第二标识和第二描述信息,第八消息用于请求更新第三策略规则,第二标识为上述第三策略规则的标识信息,第二标识根据第一标识确定;
第二SMF接收PCF发送的第五策略规则,第五策略规则为根据上述第二描述信息更新上述第三策略规则后得到的策略规则;
第二SMF根据第五策略规则更新上述第一策略规则,得到第四策略规则;
第二SMF向第一SMF发送第四策略规则。
本申请实施例中,第二SMF根据第二描述信息更新上述第一策略规则,得到第四策略规则,并向第一SMF发送该第四策略规则,从而使第一SMF生成对应于第二描述信息的策略规则。实现在事件订阅完成后,对事件订阅的更新。
结合第二方面的第三种实施方式,本申请实施例第二方面的第四种实施方式中,在第二SMF接收第一SMF发送的第四消息之后,该方法还包括:
第二SMF接收第一SMF发送的第十一消息,第十一消息用于请求第二SMF更新上述第四策略规则,第十一消息中包括第一标识和上述数据的第三描述信息,第三描述信息也可称为第三数据描述信息;
第二SMF向PCF发送第二标识和第三描述信息,以请求PCF根据第三描述信息更新上 述第五策略规则;
第二SMF接收PCF发送的第七策略规则,第七策略规则为根据上述第三描述信息更新上述第五策略规则后得到的策略规则;
第二SMF根据第七策略规则更新上述第四策略规则,得到第六策略规则;
第二SMF向第一SMF发送第六策略规则。
本申请实施例中,第二SMF向PCF发送第三描述信息和第二标识,使得PCF根据该第三描述信息更新上述第五策略规则,得到第七策略规则,接收PCF发送的第七策略规则,从而生成对应于第三描述信息的第六策略规则。实现在对事件订阅的更新后,再次对事件订阅的更新。
结合第二方面和第二方面的第一种实施方式至第四种实施方式中的任一种,本申请实施例第二方面的第五种实施方式中,还可以实现对事件订阅的删除:
第二消息中还包括第一标识,第一标识用于标识第二SMF与第一SMF之间的事务,对应于第一事件的订阅;
第二SMF向PCF发送第七消息之后,该方法还包括:
第二SMF接收第一SMF发送的第六消息,第六消息包括上述第一标识和删除指示;
第二SMF向PCF发送第九消息,第九消息用于请求删除上述第三策略规则,第九消息中包括第二标识,第二标识为上述第三策略规则的标识信息,第二标识根据第一标识确定。
本申请实施例中,第二SMF向PCF发送第九消息,使得PCF根据第九消息中的第二标识删除上述第三策略规则,实现对事件订阅的删除。
结合第二方面的第三种实施方式,本申请实施例第二方面的第六种实施方式中,还可以实现对更新后的事件订阅的删除:
第二SMF向PCF发送第二标识和第三描述信息之后,该方法还包括:
第二SMF接收第一SMF发送的第十三消息,第十三消息包括上述第一标识和删除指示;
第二SMF向PCF发送第十四消息,第十四消息用于请求删除上述第五策略规则,第十四消息中包括第二标识,第二标识用于标识上述第五策略规则。
本申请实施例中,第二SMF向PCF第十四消息,使得PCF根据第十四消息中的第二标识删除上述第五策略规则,实现对更新后事件订阅的删除。
结合第二方面、第二方面的第一种实施方式至第二方面的第六种实施方式中的任一种,本申请实施例第二方面的第七种实施方式中,
第一事件包括下行数据通知失败事件或下行数据传输状态事件。
结合第二方面、第二方面的第一种实施方式至第二方面的第七种实施方式中的任一种,本申请实施例第二方面的第八种实施方式中,第三策略规则为PCC规则。
结合第二方面、第二方面的第一种实施方式至第二方面的第八种实施方式中的任一种,本申请实施例第二方面的第九种实施方式中,第一策略规则为第一N4信息。
结合第二方面的第二种实施方式,本申请实施例第一方面的第十种实施方式中,通知控制指示信息包括在上述第三策略规则中。
本申请实施例中,通知控制指示信息包括在上述第三策略规则中,在转发和使用第一 策略规则的过程中,通知控制指示信息包括在第三策略规则中,不需要再对通知控制指示信息单独处理,节省设备的运算资源。
结合第二方面的第二种实施方式,本申请实施例第二方面的第十一种实施方式中,通知控制指示信息包括在上述第一策略规则中。
本申请实施例中,通知控制指示信息包括在上述第一策略规则中,在转发和使用第一策略规则的过程中,通知控制指示信息包括在第一策略规则中,不需要再对通知控制指示信息单独处理,节省设备的运算资源。
结合第二方面的第三种实施方式至第二方面的第六种实施方式中的任一种,本申请实施例第二方面的第十二种实施方式中,第一标识为事务标识,表示第一SMF和第二SMF之间的事务,对应于第一事件的订阅。
结合第二方面的第十二种实施方式,本申请实施例第二方面的第十三种实施方式中,事务标识为NEF通知关联标识,NEF通知关联标识用于标识上述第一事件的订阅。
本申请实施例第三方面提供了一种会话管理网元,包括:
第一接收单元,用于接收第一消息,所述第一消息用于请求创建第一事件的订阅,所述第一事件的订阅为针对用户设备UE的事件订阅,所述第一消息包括数据的第一描述信息,所述数据为所述UE接收的数据;
第一发送单元,用于根据请求策略指示信息向第二会话管理网元SMF发送第二消息,所述第二消息包括所述第一描述信息,所述第二消息用于请求所述第一描述信息对应的第一策略规则;
第二接收单元,用于接收所述第二SMF发送的所述第一策略规则;
第一确定单元,用于根据所述第一策略规则确定第二策略规则;
第二发送单元,用于向用户面功能网元UPF发送所述第二策略规则,以使得所述UPF对所述数据进行处理。
该会话管理网元用于执行前述第一方面的方法。
本申请实施例第四方面提供了一种会话管理网元,包括:
第七接收单元,用于接收第一会话管理网元SMF发送的第二消息,所述第一消息包括第一描述信息和事件订阅类型指示信息,所述事件订阅类型指示信息用于指示事件订阅的类型,所述事件订阅为针对用户设备UE的事件订阅,所述第一描述信息用于标识所述UE接收的数据;
第五发送单元,用于向策略控制网元PCF发送第七消息,所述第七消息用于请求所述第一描述信息对应的第三策略规则,所述第七消息包括所述第一描述信息和下行数据通知事件订阅触发器,所述下行数据通知事件订阅触发器根据所述事件订阅类型指示信息确定;
第八接收单元,用于接收所述PCF发送的所述第三策略规则;
第二确定单元,用于根据所述第三策略规则确定第一策略规则;
第六发送单元,用于向所述第一SMF发送所述第一策略规则。
该会话管理网元用于执行前述第二方面的方法。
本申请实施例第五方面提供了一种会话管理网元,包括:
处理器、存储器、输入输出设备以及总线;
所述处理器、存储器、输入输出设备与所述总线相连;
所述处理器用于执行如下步骤:
接收第一消息,所述第一消息用于请求创建第一事件的订阅,所述第一事件的订阅为针对用户设备UE的事件订阅,所述第一消息包括数据的第一描述信息,所述数据为所述UE接收的数据;
根据请求策略指示信息向第二会话管理网元SMF发送第二消息,所述第二消息包括所述第一描述信息,所述第二消息用于请求所述第一描述信息对应的第一策略规则;
接收所述第二SMF发送的所述第一策略规则;
根据所述第一策略规则确定第二策略规则;
向用户面功能网元UPF发送所述第二策略规则,以使得所述UPF对所述数据进行处理。
该会话管理网元用于执行前述第一方面的方法。
本申请实施例第六方面提供了一种会话管理网元,包括:
处理器、存储器、输入输出设备以及总线;
所述处理器、存储器、输入输出设备与所述总线相连;
所述处理器用于执行如下步骤:
接收第一会话管理网元SMF发送的第二消息,所述第一消息包括第一描述信息和事件订阅类型指示信息,所述事件订阅类型指示信息用于指示事件订阅的类型,所述事件订阅为针对用户设备UE的事件订阅,所述第一描述信息用于标识所述UE接收的数据;
向策略控制网元PCF发送第七消息,所述第七消息用于请求所述第一描述信息对应的第三策略规则,所述第七消息包括所述第一描述信息和下行数据通知事件订阅触发器,所述下行数据通知事件订阅触发器根据所述事件订阅类型指示信息确定;
接收所述PCF发送的所述第三策略规则;
根据所述第三策略规则确定第一策略规则;
向所述第一SMF发送所述第一策略规则。
该会话管理网元用于执行前述第二方面的方法。
本申请实施例第七方面提供了一种策略规则的提供方法,该方法包括:
在用户设备UE接入网络,建立PDU会话后,应用可以请求创建第一事件的订阅,第一事件与应用和UE传输的数据有关,需要UPF检测UE传输的数据包,该数据包可以包括UE接收的数据。
当应用请求订阅第一事件时,第一会话管理网元SMF可以接收到第二SMF发送的第一策略规则,第一策略规则是根据数据的第一描述信息生成的,该数据为UE接收的数据,在本申请实施例中,第一描述信息也可称为第一数据描述信息;
第一SMF根据该第一策略规则确定第二策略规则;
第一SMF向用户面功能网元UPF发送第二策略规则,以使得UPF对上述数据进行处理。
本申请实施例中,无法与PCF直接交互的第一SMF,通过接收第二SMF根据第一描述信息生成的第一策略规则,从而生成对应的策略规则。实现第一SMF在无法与PCF直接连 接的情况下完成事件的订阅。
结合第七方面,本申请实施例第七方面的第一种实施方式中,还可以实现更新第一事件订阅时,提供相应的策略规则:
具体的,第一SMF接收第二SMF发送的第一策略规则之后,
第一SMF接收第二SMF发送的第四策略规则,第四策略规则为根据上述数据的第二描述信息更新上述第一策略规则后得到的策略规则;
第一SMF根据第四策略规则更新上述第二策略规则,在第一SMF处得到对应于上述第二描述信息的策略规则。
本申请实施例中,第二SMF根据第二描述信息更新上述第一策略规则,得到第四策略规则,第一SMF接收第二SMF发送的第四策略规则,从而生成对应于第二描述信息的策略规则。实现在事件订阅完成后,对事件订阅的更新。
结合第七方面的第一种实施方式,本申请实施例第七方面的第二种实施方式中,在第一SMF接收第二SMF发送的第四策略规则之后,该方法还包括:
第一SMF接收第二SMF发送的第六策略规则,第六策略规则为根据上述数据的第三描述信息更新上述第四策略规则后得到的策略规则;
第一SMF根据第六策略规则更新第一SMF处与第一事件相关的策略规则,在第一SMF处得到对应于上述第三描述信息的策略规则。
本申请实施例中,第二SMF根据第三描述信息更新上述第四策略规则,得到第六策略规则,第一SMF接收第二SMF发送的第六策略规则,从而生成对应于第三描述信息的策略规则。实现在对事件订阅的更新后,再次对事件订阅的更新。
结合第七方面,本申请实施例第七方面的第三种实施方式中,还可以实现对事件订阅的删除:
具体的,第一SMF接收第二SMF发送的第一策略规则之后,
第一SMF接收第二SMF发送的删除上述第一策略规则的指示;
第一SMF删除上述第一策略规则,并向UPF发送删除上述第二策略规则的指示。
本申请实施例中,第一SMF接收第二SMF发送的删除上述第一策略规则的指示,根据该指示删除上述第一策略规则。实现对事件订阅的删除。
结合第七方面的第一种实施方式,本申请实施例第七方面的第四种实施方式中,还可以实现对更新后的第一事件订阅的删除:
具体的,第一SMF接收第二SMF发送的第四策略规则之后,
第一SMF接收第二SMF发送的删除上述第四策略规则的指示;
第一SMF删除上述第四策略规则,并向UPF发送删除与第一事件相关的策略规则的指示。
本申请实施例中,第一SMF接收第二SMF发送的删除上述第四策略规则的指示,根据该指示删除上述第四策略规则。实现对更新后的事件订阅的删除。
结合第七方面、第七方面的第一种实施方式至第七方面的第四种实施方式中的任一种,本申请实施例第七方面的第五种实施方式中,
第一SMF接收第二SMF发送的第一策略规则包括:
第一SMF接收第二SMF发送的第一策略规则和通知控制指示信息,通知控制指示信息根据上述第一事件的订阅确定;
第一SMF根据第一策略规则确定第二策略规则包括:
第一SMF根述第一策略规则和上述通知控制指示信息确定第二策略规则。
本申请实施例中,第一SMF可以直接根据第一策略规则和通知控制指示信息确定第二策略规则,不需要确定第一策略规则所对应的第一事件,再根据该第一事件确定第二策略规则,节省了第一SMF的运算资源和时延,提高了效率。
结合第七方面、第七方面的第一种实施方式至第七方面的第四种实施方式中的任一种,本申请实施例第七方面的第六种实施方式中,
第一SMF根据第一策略规则确定第二策略规则包括:
第一SMF根据第一策略规则和第一事件的订阅确定第二策略规则。
本申请实施例中,第一SMF根据第一策略规则和第一事件的订阅确定第二策略规则,不需要在与第二SMF发送和接收的消息中携带通知控制指示信息,节省了网络中需要接发和确定上述指示信息的网元的运算资源和网络带宽资源。
结合第七方面、第七方面的第一种实施方式至第七方面的第六种实施方式中的任一种,本申请实施例第七方面的第七种实施方式中,
第一SMF向UPF发送第二策略规则之后,该方法还包括:
第一SMF接收UPF对上述数据处理后报告的第二事件;
第一SMF根据第二事件确定第一事件,并向事件接收网元报告第一事件,事件接收网元用于接收与第一事件相关的报告。
结合第七方面的第七种实施方式,本申请实施例第七方面的第八种实施方式中,
第二事件包括上述数据被缓存的事件或上述数据被丢包的事件。
结合第七方面、第七方面的第一种实施方式至第七方面的第八种实施方式中的任一种,本申请实施例第七方面的第九种实施方式中,
第一事件包括下行数据通知失败事件或下行数据传输状态事件。
结合第七方面、第七方面的第一种实施方式至第七方面的第九种实施方式中的任一种,本申请实施例第七方面的第十种实施方式中,第一策略规则为第一N4信息。
结合第七方面、第七方面的第一种实施方式至第七方面的第十种实施方式中的任一种,本申请实施例第七方面的第十一种实施方式中,第二策略规则为第二N4信息。
结合第七方面、第七方面的第一种实施方式至第七方面的第十一种实施方式中的任一种,本申请实施例第七方面的第十二种实施方式中,具体的,在第一SMF接收第二SMF发送的第一策略规则之前,第一SMF向第二SMF发送数据缓存在UPF的指示或需要策略规则的指示。
结合第七方面的第五种实施方式,本申请实施例第七方面的第十三种实施方式中,通知控制指示信息包括在上述第一策略规则中。
本申请实施例中,通知控制指示信息包括在上述第一策略规则中,在转发和根据第一 策略规则确定第二策略规则的过程中,通知控制指示信息包括在第一策略规则中,不需要再对通知控制指示信息单独处理,节省设备的运算资源。
本申请实施例第八方面提供了一种策略规则的提供方法,该方法包括:
在用户设备UE接入网络,建立PDU会话后,应用可以请求创建第一事件的订阅,第一事件与应用和UE传输的数据有关,需要UPF检测UE传输的数据包,该数据包可以包括UE接收的数据。
当应用请求订阅第一事件时,第二SMF可以跟据第一请求策略指示信息向PCF发送第七消息,第七消息中包括第一描述信息和下行数据通知事件订阅触发器,下行数据通知事件订阅触发器根据事件订阅类型指示信息确定,事件订阅类型指示信息用于指示事件订阅的类型,即第一事件的类型,第一描述信息用于标识UE接收的数据,在本申请实施例中,第一描述信息也可称为第一数据描述信息;
第二SMF接收PCF发送的上述第三策略规则;
第二SMF根据第三策略规则确定第一策略规则;
第二SMF向所述第一SMF发送第一策略规则。
本申请实施例中,能与PCF直接交互的第二SMF向PCF请求根据第一描述信息生成的第三策略规则,从而生成对应的第一策略规则,再将第一策略规则发送给第一SMF,使得第一SMF获得根据第三策略规则生成的第一策略规则,由于第三策略规则是PCF生成的,实现了第一SMF根据PCF生成的第三策略规则生成第二策略规则,实现了第一SMF在无法与PCF直接连接的情况下完成事件的订阅。
结合第八方面,本申请实施例第八方面的第一种实施方式中,
第二SMF根据第一请求策略指示信息向PCF发送第七消息之前,该方法还包括:
第二SMF接收PCF发送的第一请求策略指示信息,第一请求策略指示信息包括报告接收到下行数据通知事件订阅的指示信息;
本申请实施例中,第二SMF接收PCF发送的第一请求策略指示信息,使得第二SMF可以向PCF获取与订阅事件所对应的策略规则,从而使第一SMF通过第二SMF获取PCF生成的策略规则,从而获取事件订阅所需的策略规则。
结合第八方面和第八方面的第一种实施方式,本申请实施例第八方面的第二种实施方式中,
若第二SMF接收PCF发送的第三策略规则包括:
第二SMF接收PCF发送的第三策略规则和通知控制指示信息,通知控制指示信息根据事件订阅类型指示信息确定;
则第二SMF向第一SMF发送第一策略规则包括:
第二SMF向第一SMF发送第一策略规则和通知控制指示信息。
本申请实施例中,第二SMF向第一SMF发送第一策略规则的同时还发送了通知控制指示信息,第一SMF可以直接根据第一策略规则和通知控制指示信息确定第二策略规则,不需要确定第一策略规则所对应的第一事件,再根据该第一事件确定第二策略规则,节省了第一SMF的运算资源和时延,提高了效率。
结合第八方面和第八方面的第一种实施方式至第二种实施方式中的任一种,本申请实施例第八方面的第三种实施方式中,还可以实现更新第一事件订阅时,提供相应的策略规则:
第二SMF接收第三标识和上述数据的第二描述信息,第二描述信息用于更新上述第一事件的订阅,第三标识用于标识上述第一事件的订阅;
第二SMF向PCF发送第八消息,第八消息中包括第二标识和第二描述信息,第八消息用于请求更新第三策略规则,第二标识为上述第三策略规则的标识信息,第二标识根据第三标识确定;
第二SMF接收PCF发送的第五策略规则,第五策略规则为根据上述第二描述信息更新上述第三策略规则后得到的策略规则;
第二SMF根据第五策略规则更新上述第一策略规则,得到第四策略规则;
第二SMF向第一SMF发送第四策略规则。
本申请实施例中,第二SMF根据第二描述信息更新上述第一策略规则,得到第四策略规则,并向第一SMF发送该第四策略规则,从而使第一SMF生成对应于第二描述信息的策略规则。实现在事件订阅完成后,对事件订阅的更新。
结合第八方面的第三种实施方式,本申请实施例第八方面的第四种实施方式中,在第二SMF接收第三标识和第二描述信息之后,该方法还包括:
第二SMF接收第三标识和上述数据的第三描述信息,第三描述信息也可称为第三数据描述信息,第三标识用于标识上述第一事件的订阅;
第二SMF向PCF发送第二标识和第三描述信息,以请求PCF根据第三描述信息更新上述第五策略规则;
第二SMF接收PCF发送的第七策略规则,第七策略规则为根据上述第三描述信息更新上述第五策略规则后得到的策略规则;
第二SMF根据第七策略规则更新上述第四策略规则,得到第六策略规则;
第二SMF向第一SMF发送第六策略规则。
本申请实施例中,第二SMF向PCF发送第三描述信息和第二标识,使得PCF根据该第三描述信息更新上述第五策略规则,得到第七策略规则,接收PCF发送的第七策略规则,从而生成对应于第三描述信息的第六策略规则。实现在对事件订阅的更新后,再次对事件订阅的更新。
结合第八方面和第八方面的第一种实施方式至第四种实施方式中的任一种,本申请实施例第八方面的第五种实施方式中,还可以实现对事件订阅的删除:
第二SMF向PCF发送第七消息之后,该方法还包括:
第二SMF接收第三标识和删除指示,第三标识用于标识上述第一事件的订阅;
第二SMF向PCF发送第九消息,第九消息用于请求删除上述第三策略规则,第九消息中包括第二标识,第二标识用于标识第三策略规则。
本申请实施例中,第二SMF向PCF发送第九消息,使得PCF根据第九消息中的第二标识删除上述第三策略规则,实现对事件订阅的删除。
结合第八方面的第三种实施方式,本申请实施例第八方面的第六种实施方式中,还可以实现对更新后的事件订阅的删除:
第二SMF向PCF发送第二标识和第三描述信息之后,该方法还包括:
第二SMF接收第三标识和删除指示,第三标识用于标识上述第一事件的订阅;
第二SMF向PCF发送第十四消息,第十四消息用于请求删除上述第五策略规则,第十四消息中包括第二标识,第二标识用于标识第五策略规则;
第二SMF向第一SMF发送删除上述第四策略规则的指示。
本申请实施例中,第二SMF向PCF第十四消息,使得PCF根据第十四消息中的第二标识删除上述第五策略规则,并向第一SMF发送删除上述第四策略规则的指示使得第一SMF删除上述第四策略规则,实现对更新后事件订阅的删除。
结合第八方面、第八方面的第一种实施方式至第八方面的第六种实施方式中的任一种,本申请实施例第八方面的第七种实施方式中,
第一事件包括下行数据通知失败事件或下行数据传输状态事件。
结合第八方面、第八方面的第一种实施方式至第八方面的第七种实施方式中的任一种,本申请实施例第八方面的第八种实施方式中,第一策略规则为第一N4信息。
结合第八方面、第八方面的第一种实施方式至第八方面的第八种实施方式中的任一种,本申请实施例第八方面的第九种实施方式中,第三策略规则为PCC规则。
结合第八方面、第八方面的第一种实施方式至第八方面的第九种实施方式中的任一种,本申请实施例第七方面的第十种实施方式中,具体的,在第二SMF根据第一请求策略指示信息向PCF发送第七消息之前,第二SMF接收第一SMF发送的数据缓存在UPF的指示或需要策略规则的指示。
结合第八方面的第三种实施方式,本申请实施例第八方面的第十一种实施方式中,第三标识为SMF订阅关联标识。
结合第八方面的第二种实施方式,本申请实施例第八方面的第十二种实施方式中,通知控制指示信息包括在上述第三策略规则中。
本申请实施例中,通知控制指示信息包括在上述第三策略规则中,在转发和使用第一策略规则的过程中,通知控制指示信息包括在第三策略规则中,不需要再对通知控制指示信息单独处理,节省设备的运算资源。
结合第八方面的第二种实施方式,本申请实施例第一方面的第十三种实施方式中,通知控制指示信息包括在上述第一策略规则中。
本申请实施例中,通知控制指示信息包括在上述第一策略规则中,在转发和使用第一策略规则的过程中,通知控制指示信息包括在第一策略规则中,不需要再对通知控制指示信息单独处理,节省设备的运算资源。
结合第八方面的第三种实施方式,本申请实施例第一方面的第十四种实施方式中,第三标识为SMF订阅关联标识。
结合第八方面的第三种实施方式,本申请实施例第一方面的第十四种实施方式中,第三标识为NEF订阅关联标识。
本申请实施例第九方面提供了一种会话管理网元,包括:
第一接收单元,用于接收第二SMF发送的第一策略规则,第一策略规则是根据数据的第一描述信息生成的,该数据为UE接收的数据,在本申请实施例中,第一描述信息也可称为第一数据描述信息;
第一确定单元,用于根据该第一策略规则确定第二策略规则;
第一发送单元,用于向用户面功能网元UPF发送第二策略规则,以使得UPF对上述数据进行处理。
该会话管理网元用于执行前述第七方面的方法。
本申请实施例第十方面提供了一种会话管理网元,包括:
第二发送单元,用于跟据第一请求策略指示信息向PCF发送第七消息,第七消息中包括第一描述信息和下行数据通知事件订阅触发器,下行数据通知事件订阅触发器根据事件订阅类型指示信息确定,事件订阅类型指示信息用于指示事件订阅的类型,即第一事件的类型,第一描述信息用于标识UE接收的数据,在本申请实施例中,第一描述信息也可称为第一数据描述信息;
第二接收单元,用于接收PCF发送的上述第三策略规则;
第二确定单元,用于根据第三策略规则确定第一策略规则;
第三发送单元,用于向所述第一SMF发送第一策略规则。
该会话管理网元用于执行前述第八方面的方法。
本申请实施例第十一方面提供了一种会话管理网元,包括:
处理器、存储器、输入输出设备以及总线;
所述处理器、存储器、输入输出设备与所述总线相连;
所述处理器用于执行如下步骤:
接收第二SMF发送的第一策略规则,第一策略规则是根据数据的第一描述信息生成的,该数据为UE接收的数据,在本申请实施例中,第一描述信息也可称为第一数据描述信息;
根据该第一策略规则确定第二策略规则;
向用户面功能网元UPF发送第二策略规则,以使得UPF对上述数据进行处理。
该会话管理网元用于执行前述第七方面的方法。
本申请实施例第十二方面提供了一种会话管理网元,包括:
处理器、存储器、输入输出设备以及总线;
所述处理器、存储器、输入输出设备与所述总线相连;
所述处理器用于执行如下步骤:
跟据第一请求策略指示信息向PCF发送第七消息,第七消息中包括第一描述信息和下行数据通知事件订阅触发器,下行数据通知事件订阅触发器根据事件订阅类型指示信息确定,事件订阅类型指示信息用于指示事件订阅的类型,即第一事件的类型,第一描述信息用于标识UE接收的数据,在本申请实施例中,第一描述信息也可称为第一数据描述信息;
接收PCF发送的上述第三策略规则;
根据第三策略规则确定第一策略规则;
向所述第一SMF发送第一策略规则。
该会话管理网元用于执行前述第八方面的方法。
本申请实施例第十三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保存有程序,当所述计算机执行所述程序时,执行前述第一方面、第二方面、第七方面和第八方面所述的方法。
本申请实施例第十四方面提供了一种计算机程序产品,当该计算机程序产品在计算机上执行时,所述计算机执行前述第一方面、第二方面、第七方面和第八方面所述的方法。
附图说明
图1为业务能力开放的网络框架示意图;
图2为本申请实施例中策略规则的提供方法一个流程示意图;
图3为本申请实施例中策略规则的提供方法一个流程示意图;
图4a为本申请实施例中策略规则的提供方法另一流程示意图;
图4b为本申请实施例中策略规则的提供方法另一流程示意图;
图5a为本申请实施例中策略规则的提供方法另一流程示意图;
图5b为本申请实施例中策略规则的提供方法另一流程示意图;
图6为本申请实施例中策略规则的提供方法另一流程示意图;
图7为本申请实施例中策略规则的提供方法另一流程示意图;
图8a为本申请实施例中策略规则的提供方法另一流程示意图;
图8b为本申请实施例中策略规则的提供方法另一流程示意图;
图9a为本申请实施例中策略规则的提供方法另一流程示意图;
图9b为本申请实施例中策略规则的提供方法另一流程示意图;
图10为本申请实施例中会话管理网元一个结构示意图;
图11为本申请实施例中会话管理网元另一结构示意图;
图12为本申请实施例中会话管理网元一个结构示意图;
图13为本申请实施例中会话管理网元另一结构示意图;
图14为本申请实施例中会话管理网元一个结构示意图。
具体实施方式
本申请实施例提供了一种策略规则的提供方法,用于当SMF无法直接与PCF交互时,获取PCC规则,从而获取用于UPF检测数据包的策略规则。
请参阅图1,图1为支持4G/5G及下一代移动通信网络互通的业务能力开放(SCEF,service capability exposure function)(NEF,network exposure function)的架构图。基于该架构,3GPP网络能够安全地向第三方应用服务提供商(3drd party ASP,3drd party application service provider)的应用功能(AF,application function)提供业务能力。网络开放功能(NEF,network exposure function)为该架构中的核心网元,使得3GPP网络能够安全地向第三方的业务提供者业务能力服务器(SCS,services capability server) 或应用服务器(AS,application server)提供业务能力。统一数据管理功能(UDM,unified data management)为统一数据管理网元,保存用户的签约信息。核心网接入和移动性管理功能(AMF,core access and mobility management function)为5G及下一代移动通信网络中负责对UE进行移动性管理的网元。会话管理功能(SMF,session management function)为5G及下一代移动通信网络中负责对用户设备(UE,user equipment)的PDU会话进行管理的网元。AF通过Nnef服务的API接口调用NEF提供的业务能力。
在一个示例中,当应用订阅某一事件,该事件需要在UPF检测数据传输时,需要根据PCC规则生成在UPF执行的相应的策略。该策略可以是报文检测规则(PDR,packet detection rule),或是其他与数据包传输有关的规则,例如转发动作规则(FAR,forwarding action rule)、用量上报规则(URR,usage reporting rule)等,具体此处不做限定。
在本申请实施例中,所有的消息,包括订阅请求消息、更新上下文请求消息、更新请求消息、确认消息等,都是对发送消息的举例,并不构成对消息的限定,只要是携带了本申请实施例中所述的数据,即可认为是本申请实施例所述的消息,具体此处不作限定。
本申请实施例提供了一种通过能与PCF直接交互的第二SMF获取PCC规则,从而根据该PCC规则制定用于UPF检测数据包的策略规则的方法。
本申请实施例中V-SMF也可称为第一SMF,第一SMF不能与PCF交互,除了V-SMF,本申请实施例中可以是其他不能与PCF交互的第一SMF,例如I-SMF,具体此处不作限定,本申请实施例以V-SMF为例,并不造成对第一SMF的限定。
本申请实施例中,第一和第二仅是对类似的主体进行区分,例如用于区分与UPF交互但不能直接与PCF交互的第一SMF和能够直接与PCF交互的第二SMF;或者用于区分事件订阅时提供的第一数据描述信息和事件更新时提供的第二数据描述信息,第一和第二并不造成对该类似主体的限定。
本申请实施例中,三元组信息也可称为数据描述信息(traffic descriptors)。数据描述信息也可称为描述信息,用于标识应用的下行数据。除了三元组信息,数据描述信息也可以是其他的信息,例如标识应用服务器的MAC地址或VLAN ID等,具体此处不做限定。本申请实施例仅以三元组信息为例,并不造成对数据描述信息的限定。
具体的,三元组信息为用于标识应用服务器的地址、端口号和协议类型的IP三元组信息。
具体的,在事件订阅的实施例中,例如图2、图3、图6或图7所示的实施例中,三元组信息为第一数据描述信息;在事件更新的实施例中,例如图4a、图4b、图8a或图8b所示的实施例中,三元组信息为第二数据描述信息。
应用可以向网络订阅不同的事件,例如下行数据传递失败后可达事件,或者也可以是其他事件,例如下行数据传递状态事件,具体此处不作限定。以下将针对不同事件的策略规则,对提供该策略规则的过程举例说明。
一、获取下行数据通知失败后可达事件的策略规则:
1、订阅下行数据通知失败后可达事件:
在本申请实施例中,下行数据通知失败后可达事件(availability after downlink  data notification failure event)也可称为下行数据传输失败后可达事件或下行数据传递失败后可达事件。
在本申请实施例中,可以由第一SMF来向PCF请求PCC规则,也可以由第二SMF来向PCF请求PCC规则,下面将对这两种情况分别进行说明:
1.1、第一SMF向PCF请求PCC规则:
请参阅图2,当UE处于漫游状态,即V-SMF无法与PCF直接交互时,AF订阅下行数据传递失败后可达事件,由第一SMF来向PCF请求PCC规则。对于PDU会话存在I-SMF的场景,将V-SMF替换为I-SMF即可,具体此处不做限定。本申请实施例中提供策略规则的一个流程包括:
201、UE接入网络,建立PDU会话:
UE接入网络并建立PDU会话,PDU会话建立了UE到UPF的数据通道。UE可以通过这个数据通道和应用服务器交互。
可选地,在PDU会话建立或者修改的过程中,PCF可以向第二SMF发送策略控制请求触发器(PCRT,policy control request trigger),该触发器为携带数据描述的下行数据通知失败事件订阅(downlink data notification failure event subscribed with traffic descriptor)。该PCRF用于指示第二SMF当接收到携带数据描述的下行数据通知失败事件订阅时,向PCF请求PCC规则。在本申请实施例中,该PCRT也称为下行数据通知事件订阅触发器。
可选地,在PDU会话建立或者修改的过程中,PCF可以向第二SMF发送报告接收到下行数据通知事件订阅的指示信息。在本申请实施例中,该指示信息也称为第一请求策略指示信息。
进一步的,第二SMF可以根据携带数据描述的下行数据通知失败事件订阅的PCRT,将确定策略计费控制应用于所述UE的指示信息、报告接收到下行数据通知失败事件订阅的指示信息或报告接收到数据描述信息的指示信息发送给V-SMF。
在本申请实施例中,上述指示信息也可以称为请求策略指示信息或第二请求策略指示信息,用于指示第一SMF获取与订阅事件所对应的策略规则。
在本申请实施例中,下行数据通知失败事件(downlink data notification failure event)也可称为下行数据传输失败事件或下行数据传递失败事件,在本申请实施例中,该事件也称为第一事件。
202、AF向NEF发送订阅请求消息:
AF向NEF发送Nnef_EventExposure_Subscribe Request消息,订阅下行数据传递失败后可达(availability after downlink data notification failure)事件。
消息中携带事件标识(event id)、AF通知端点(AF notification endpoint)、用户的外部标识或外部用户组标识,以及三元组信息。
在本申请实施例中,事件订阅时提供的数据描述信息称为第一数据描述信息,事件更新时提供的数据描述信息称为第二数据描述信息。在本实施例或图3所示实施例中,数据描述信息为第一数据描述信息。
事件标识(event id)表示订阅的事件,在本实施例中为下行数据通知失败后可达事件的标识。
AF通知端点用于指示AF接收事件通知的端点,AF通知端点可以包括AF通知目标地址(AF notification target address)。当AF为多个订阅通知分配相同的AF通知目标地址时,可以通过AF通知关联标识来区分不同的订阅,此时AF通知端点包括AF通知目标地址(AF notification target address)和AF通知关联标识(AF notification correlation Id)。
203、NEF向UDM发送订阅请求消息:
NEF向UDM发送Nudm_EventExposure_Subscribe Request消息,订阅下行数据通知失败后可达事件。
消息中携带步骤202中接收到的事件标识、三元组信息和用户的外部标识或外部用户组标识,以及NEF用于接收订阅通知的NEF通知端点(NEF notification endpoint)。
NEF通知端点用于指示NEF用于接收订阅通知的端点,用于标识检测到的下行数据通知失败后可达事件向哪个NEF网元反馈,NEF通知端点可以包括NEF通知目标地址(NEF notification target address)和NEF通知关联标识(NEF notification correlation Id)。当NEF为多个订阅通知分配相同的NEF通知目标地址时,可以通过NEF通知关联标识来区分不同的事件。
204、UDM向UE注册的AMF发送订阅请求消息:
UDM在步骤203中接收到用户外部标识,就可以根据外部标识确定用户内部标识。
在本申请实施例中,当事件订阅针对多个用户时,步骤202及203中用户的外部标识也可以是外部用户组标识,外部用户组标识表示每一个上述用户,此时就可以根据该外部用户组标识确定每个上述用户的内部标识,具体此处不作限定。
UDM可以根据保存在本地的对应关系,以及用户内部标识,确定UE注册的AMF,并向UE注册的AMF发送Namf_EventExposure_Subscribe Request消息,订阅下行数据通知失败后可达事件。
消息中携带步骤203中接收到的事件标识、三元组信息、NEF通知端点,以及上述用户内部标识。
若步骤203中接收到用户组标识,则UDM可以为用户组中的每一个UE向UE注册的AMF发送上述消息。
205、AMF向UDM返回确认消息:
AMF根据步骤204中接收到的事件标识分配AMF订阅关联标识(AMF subscription correlation id),AMF订阅关联标识用来标识下行数据通知失败后可达事件的订阅,表示该事件已在AMF处订阅成功。
AMF保存接收到的信息,并向UDM返回确认消息,消息中携带上述AMF订阅关联标识。
206、UDM向NEF返回确认消息:
UDM为事件订阅分配UDM订阅关联标识(UDM subscription correlation id),UDM订阅关联标识用来标识下行数据通知失败后可达事件,表示该事件已在UDM处订阅成功。
UDM向NEF返回确认消息,确认消息中携带上述UDM订阅关联标识。
207、NEF向AF返回确认消息:
NEF为事件订阅分配NEF订阅关联标识(NEF subscription correlation id),NEF订阅关联标识用来标识下行数据通知失败后可达事件,表示该事件订阅已在NEF处订阅成功。
NEF保存接收到的信息,并向AF返回确认消息,确认消息中携带上述NEF订阅关联标识。
在本申请实施例中,步骤206可在步骤205或204之前执行,只要在步骤203之后执行即可;步骤207可在步骤203至206中的任一步之前执行,只要在步骤202之后执行即可,具体此处不作限定。
步骤208至214有两种实现方式,具体如下:
A:消息中携带通知控制指示信息,用于生成对应的策略规则,具体的实现方式为:
208、AMF向V-SMF发送第一消息:
AMF可以根据步骤204中事件的订阅生成下行数据通知失败(downlink data notification failure)通知指示信息,该指示信息用于表示事件订阅的类型,具体可以是下行数据通知失败事件的事件标识,或AMF分配的其他标识,具体此处不做限定。
AMF向V-SMF发送Nsmf_PDUSession_UpdateSMContext Request消息,订阅下行数据通知失败事件。在本实施例中,该消息也可以称为第一消息。本申请实施例中,第一消息用于向V-SMF请求创建事件的订阅,例如在本实施例中就用于请求创建下行数据通知失败事件的订阅;在其他实施例中,也可以用于请求创建其他事件的订阅;第一消息也可以是其他形式的消息,此处的举例并不造成对第一消息的限定。
消息中携带步骤204中接收到的NEF通知关联标识、三元组信息和上述下行数据通知失败通知指示信息。
209、V-SMF向AMF返回确认消息。
210、V-SMF确定需要请求用于处理数据的策略规则,并向第二SMF发送第二消息:
在步骤201中,V-SMF接收到策略计费控制应用于所述UE的指示信息、报告接收到下行数据通知失败事件订阅的指示信息或报告接收到数据描述信息的指示信息,V-SMF可以确定PCC应用于该PDU会话,并且当V-SMF确定数据需要缓存在UPF时,也就能确定需要向第二SMF报告接收到的事件订阅以及请求用于在UPF对数据进行处理的策略。
V-SMF可以为该事件分配事务标识(Transaction Id),事务标识用来表示V-SMF和第二SMF之间的事务,用于后续的修改和删除操作,事务标识也可用于标识针对第一事件订阅的策略规则请求。在本申请实施例中,事务标识也可称为第一标识信息。在本申请实施例中,事务标识对应于第一事件的订阅。本实施例中,事务标识对应于下行数据通知失败事件的订阅。
V-SMF还可以根据步骤208中事件的订阅分配DDN_Failure指示信息,DDN_Failure指示信息用于指示接收到的事件订阅类型为下行数据通知失败订阅。
DDN_Failure指示信息在本实施例中也称为事件订阅类型指示信息。本申请实施例中,事件订阅类型指示信息用于表示事件订阅的类型,是根据事件的订阅生成的,在其他事件的订阅中,事件订阅类型指示信息相应的也可以用于表示其他事件的事件订阅,例如下行 数据传递状态事件的事件订阅,具体此处不作限定。
具体的,事件订阅类型指示信息可以根据步骤208中的表示事件订阅类型的指示信息生成,或者也可以就是步骤208中的表示事件订阅类型的指示信息,具体此处不作限定。
具体地,V-SMF向第二SMF发送Nsmf_PDUSession_Update Request消息,报告接收到的事件订阅,请求用于对数据进行检测的策略。消息中携带三元组信息,上述事务标识(Transaction Id)以及上述DDN_Failure指示信息。在本实施例中,该消息也可以称为第二消息。本申请实施例中,第二消息用于向第二SMF请求订阅事件所对应的用于处理数据的策略规则。
在本申请实施例中,步骤210也可以在步骤209之前执行,只要在步骤208之后执行即可,具体此处不作限定。
211、第二SMF向PCF发送第七消息:
步骤210中第二SMF接收的第二消息中同时包括三元组信息和事务标识。
接收到事务标识,第二SMF需要向PCF请求用于检测下行数据传递失败事件的PCC规则,由于之前PCF提供了携带数据描述的下行数据通知失败事件订阅的PCRT,第二SMF可以向PCF发送Npcf_SMPolicyControl_Update请求消息。在本实施例中,该消息也可以称为第七消息。本申请实施例中,第七消息用于向PCF请求PCC规则。
第二SMF根据第二消息中的DDN_Failure指示信息确定该消息用于请求用于检测下行数据传递失败事件的PCC规则,第二SMF就可以查找到步骤201中接收到的该事件所对应的PCRT。
消息中携带步骤210中接收到的三元组信息和上述PCRT。
可选地,消息中还可以携带操作指示Create,表示该消息用于请求新的PCC规则。
212、PCF制定PCC规则,并向第二SMF发送第三策略规则:
PCF根据步骤211中接收到的三元组信息制定PCC规则(PCC rule),即在PCC规则中的过滤器模板中包括该三元组信息,并且设置高优先级,PCC规则中包括PCC规则标识(PCC rule Id),PCC规则标识用来表示该PCC规则,在后续对PCC规则进行更新或删除时,可以根据该PCC规则标识确定对应的PCC规则,从而做出对PCC规则的变动。在本申请实施例中,PCC规则标识也可称为第二标识信息。
PCF还可以根据步骤211中接收到的PCRT确定DDN Failure通知控制指示信息,DDN Failure通知控制指示信息用于指示需要执行DNN Failure通知。DDN Failure通知控制指示信息可以包含在PCC规则中,用于指示该PCC规则用于检测下行数据通知失败事件。
DDN_Failure通知控制指示信息在本实施例中也称为通知控制指示信息。本申请实施例中,通知控制指示信息用于表示所述事件订阅对应的动作,是根据事件订阅类型指示信息生成的。
PCF向第二SMF返回确认消息,消息中携带上述PCC规则。在本申请实施例中,事件订阅的过程中生成的PCC规则也可以称为第三策略规则。
可选地,DDN Failure通知控制指示信息还可以不包含在PCC规则中,而是携带于该确认消息中,具体此处不做限定。
213、第二SMF接收第三策略规则,生成第一N4信息(N4 information),并向V-SMF发送第一策略规则:
当第二SMF接收到步骤212的PCC规则(第三策略规则),由于步骤210中的第二消息中同时包括三元组信息和事务标识,而该PCC规则又是根据该三元组信息生成的,因此第二SMF可以据此确定并保存事务标识和PCC规则标识的对应关系。在后续对下行数据通知失败订阅进行更新或删除时,可以根据该对应关系查找到该事件所对应的PCC规则标识,从而向PCF发出相应的指令,使PCF更新或删除该PCC规则标识所对应的PCC规则。
第二SMF根据PCC规则确定携带第一PDR的第一N4信息。步骤212的PCC规则或确认消息中包括DDN Failure通知控制指示信息,因此第一N4信息中也可以包括DDN Failure通知控制指示信息,第一PDR是根据上述PCC规则确定的,与上述PCC规则携带相同的优先级信息和过滤器模板。
第二SMF向V-SMF返回确认消息,消息中携带上述第一N4信息。在本申请实施例中,事件订阅的过程中生成的第一N4信息也可以称为第一策略规则。
可选的,DDN Failure通知控制指示信息也可以不包括在第一N4信息中,而是携带于上述确认消息中,具体此处不做限定。
214、V-SMF向UPF发送第二N4信息(第二策略规则):
由于步骤213中的第一N4信息或确认消息中包括DDN Failure通知控制指示信息,因此V-SMF可以确定该第一N4信息用于检测下行数据通知失败事件;
V-SMF根据第一N4信息确定第二N4信息。具体如下:
当V-SMF接收到AMF的UE不可达通知时,V-SMF可以根据第一PDR确定第二PDR。第二PDR是根据上述第一PDR生成的,包括与上述第一PDR相同的过滤器模板和优先级信息。V-SMF可以根据DDN Failure通知控制指示信息和第二PDR确定关联的FAR。FAR用于指示UPF丢弃与第二PDR匹配的数据包并进行报告。
当V-SMF接收到AMF的UE处于空闲状态的通知时,V-SMF可以根据第一PDR确定第二PDR,第二PDR是根据上述第一PDR生成的,包括与上述第一PDR相同的过滤器模板和优先级信息。V-SMF可以根据DDN Failure通知控制指示信息和第二PDR确定关联的FAR和URR。FAR用于指示UPF丢弃缓存的与第二PDR匹配的数据,URR用于指示UPF当丢弃缓存的与第二PDR匹配的数据包时进行报告。
具体的,生成第二PDR的过程,可以是直接将第一PDR作为第二PDR,生成第二PDR也可以通过其他方式,例如对第一PDR进行格式变换,生成第二PDR,具体此处不作限定。
V-SMF向UPF发送第二N4信息(N4 information),第二N4信息包括上述第二PDR、FAR和URR。在本申请实施例中,事件订阅的过程中生成的第二N4信息也可以称为第二策略规则。
本申请实施例中,第一SMF可以直接根据第一策略规则和通知控制指示信息确定第二策略规则,不需要确定第一策略规则所对应的第一事件,再根据该第一事件确定第二策略规则,节省了第一SMF的运算资源和时延,提高了效率。
B:消息中不携带通知控制指示信息,根据事件的订阅生成对应的策略规则,具体的实 现方式为:
208、AMF向V-SMF发送第一消息:
AMF向V-SMF发送Nsmf_PDUSession_UpdateSMContext Request消息,订阅下行数据通知失败事件。在本实施例中,该消息也可以称为第一消息。
消息中携带步骤204中接收到的NEF通知关联标识和三元组信息。
209、V-SMF向AMF返回确认消息。
210、V-SMF确定需要请求用于处理数据的策略规则,并向第二SMF发送第二消息:
在步骤201中,V-SMF接收到策略计费控制应用于所述UE的指示信息、报告接收到下行数据通知失败事件订阅的指示信息或报告接收到数据描述信息的指示信息,V-SMF可以确定PCC应用于该PDU会话,并且当V-SMF确定数据需要缓存在UPF时,也就能确定需要向第二SMF报告接收到的事件订阅以及请求用于在UPF对数据进行处理的策略。
V-SMF可以为该事件分配事务标识(Transaction Id),事务标识用来表示V-SMF和第二SMF之间的事务,用于后续的修改和删除操作,事务标识也可用于标识针对第一事件订阅的策略规则请求。在本申请实施例中,事务标识也可称为第一标识信息。在本申请实施例中,事务标识对应于第一事件的订阅。本实施例中,事务标识对应于下行数据通知失败事件的订阅。
具体地,V-SMF向第二SMF发送Nsmf_PDUSession_Update Request消息,报告接收到的事件订阅,请求用于对数据进行检测的策略。消息中携带三元组信息和上述事务标识(Transaction Id)。在本实施例中,该消息也可以称为第二消息。
在本申请实施例中,步骤210也可以在步骤209之前执行,只要在步骤208之后执行即可,具体此处不作限定。
211、第二SMF向PCF发送第七消息:
步骤210中第二SMF接收的第二消息中同时包括三元组信息和事务标识。
接收到事务标识,第二SMF需要向PCF请求用于检测下行数据传递失败事件的PCC规则,由于之前PCF提供了携带数据描述的下行数据通知失败事件订阅的PCRT,第二SMF可以向PCF发送Npcf_SMPolicyControl_Update请求消息。在本实施例中,该消息也可以称为第七消息。本申请实施例中,第七消息用于向PCF请求PCC规则。
消息中携带步骤210中接收到的三元组信息和上述PCRT。
可选地,消息中还可以携带操作指示Create,表示该消息用于请求新的PCC规则。
212、PCF制定PCC规则,并向第二SMF发送第三策略规则:
PCF根据步骤211中接收到的三元组信息制定PCC规则(PCC rule),即在PCC规则中的过滤器模板中包括该三元组信息,并且设置高优先级,PCC规则中包括PCC规则标识(PCC rule Id),PCC规则标识用来表示该PCC规则,在后续对PCC规则进行更新或删除时,可以根据该PCC规则标识确定对应的PCC规则,从而做出对PCC规则的变动。在本申请实施例中,PCC规则标识也可称为第二标识信息。
PCF向第二SMF返回确认消息,消息中携带上述PCC规则。在本申请实施例中,事件订阅的过程中生成的PCC规则也可以称为第三策略规则。
213、第二SMF接收第三策略规则,生成第一N4信息(N4 information),并向V-SMF发送第一策略规则:
当第二SMF接收到步骤212的PCC规则(第三策略规则),由于步骤210中的第二消息中同时包括三元组信息和事务标识,而该PCC规则又是根据该三元组信息生成的,因此第二SMF可以据此确定并保存事务标识和PCC规则标识的对应关系。在后续对下行数据通知失败订阅进行更新或删除时,可以根据该对应关系查找到该事件所对应的PCC规则标识,从而向PCF发出相应的指令,使PCF更新或删除该PCC规则标识所对应的PCC规则。
第二SMF根据PCC规则确定携带第一PDR的第一N4信息。第一PDR是根据上述PCC规则确定的,与上述PCC规则携带相同的优先级信息和过滤器模板。
第二SMF向V-SMF返回确认消息,消息中携带上述第一N4信息和事务标识。在本申请实施例中,事件订阅的过程中生成的第一N4信息也可以称为第一策略规则。
214、V-SMF向UPF发送第二N4信息(第二策略规则):
由于步骤210中V-SMF为下行数据通知失败事件分配了事务标识,V-SMF可以根据步骤213消息中的事务标识将该消息中的第一N4信息和下行数据通知失败事件订阅关联,确定第一N4信息用于检测下行数据通知失败事件。
V-SMF根据第一N4信息和下行数据通知失败事件订阅确定第二N4信息。具体如下:
当V-SMF接收到AMF的UE不可达通知时,V-SMF可以根据第一PDR确定第二PDR。第二PDR是根据上述第一PDR生成的,包括与上述第一PDR相同的过滤器模板和优先级信息。V-SMF可以根据下行数据通知失败事件订阅和第二PDR确定关联的FAR。
当V-SMF接收到AMF的UE处于空闲状态的通知时,V-SMF可以根据第一PDR确定第二PDR,第二PDR是根据上述第一PDR生成的,包括与上述第一PDR相同的过滤器模板和优先级信息。V-SMF可以根据下行数据通知失败事件订阅和第二PDR确定关联的FAR和URR。FAR用于指示UPF丢弃缓存的与第二PDR匹配的数据,URR用于指示UPF当丢弃缓存的与第二PDR匹配的数据包时进行报告。
具体的,生成第二PDR的过程,可以是直接将第一PDR作为第二PDR,生成第二PDR也可以通过其他方式,例如对第一PDR进行格式变换,生成第二PDR,具体此处不作限定。
V-SMF向UPF发送第二N4信息(N4 information),第二N4信息包括上述第二PDR、FAR和URR。在本申请实施例中,事件订阅的过程中生成的第二N4信息也可以称为第二策略规则。
本申请实施例中,第一SMF根据第一策略规则和第一事件的订阅确定第二策略规则,不需要在与第二SMF发送和接收的消息中携带事件订阅类型指示信息和通知控制指示信息,节省了网络中需要接发和确定上述两指示信息的网元的运算资源和网络带宽资源。
215、UPF通知V-SMF匹配的数据包被丢弃:
在UE不可达的情况下,UPF根据第二PDR匹配数据包,并根据上述FAR丢弃与第二PDR匹配的数据包后,通知V-SMF匹配的数据包被丢弃;或者,
在UE处于空闲状态的情况下,UPF根据第二PDR匹配数据包,并根据上述FAR缓存与第二PDR匹配的数据包。当缓存的数据包数量超过一定阈值时,UPF丢弃数据。此时根据 URR通知V-SMF匹配的数据包被丢弃。
在本申请实施例中,步骤215中丢弃数据这一事件也可称为第二事件,第一SMF可以根据第二事件确定第一事件。例如在本实施例中就可以根据丢弃数据这一事件确定下行数据传递失败事件。
216、V-SMF通知AMF下行数据传递失败:
接收到UPF反馈的数据包被丢弃的消息后,V-SMF可以向AMF发送Nsmf_PDUSession_SMContextStatusNotify消息,通知AMF下行数据传递失败。
消息中包括SMF在步骤208中接收到的NEF通知关联标识。
在本申请实施例中,AMF也可称为事件接收网元,事件接收网元用于接收与第一事件相关的报告,在本实施例中即为下行数据传递失败事件的报告。
217、AMF判断UE可达:
若AMF接收到V-SMF的下行数据通知失败消息后,UE仍然不可达,则AMF设置下行数据传递失败后可达通知(notify-on-available-after-DDN-failure)标志位。
当AMF检测到UE可达时,AMF可以根据下行数据传递失败后可达通知标志判断需要发送下行数据传递失败后可达(available-DDN-failure)事件报告。
218、AMF通知NEF UE可达:
AMF向NEF发送下行数据传递失败后可达事件报告。具体的,AMF可以向NEF发送Namf_EventExposure_Notify Request消息,消息中携带步骤204中接收到的事件标识和NEF通知端点。
219、NEF通知AF UE可达:
NEF向AF发送Nnef_EventExposure_Notify Request消息,消息中携带步骤203中接收到的事件标识和AF通知端点。
在本申请实施例中,第一SMF(可以是V-SMF或I-SMF),向SMF请求用于检测下行数据状态的策略,而SMF进一步向PCF请求PCC规则。从而实现第一SMF对订阅事件的数据包的检测。
在本申请实施例中,也可以由第二SMF来发起请求PCC规则,然后将N4信息发送给第一SMF(可以是V-SMF或I-SMF)。下面将对由第二SMF来向PCF请求PCC规则,并提供N4信息的流程进行说明:
1.2、第二SMF向PCF请求PCC规则:
请参阅图3,当UE处于漫游状态时,AF订阅下行数据传递失败后可达事件,由第二SMF来向PCF请求PCC规则。对于PDU会话存在I-SMF的场景,将V-SMF替换为I-SMF即可。本申请实施例中提供策略规则的一个流程包括:
301-307:
步骤301至307与图2所示实施例的步骤201至207类似,此处不再赘述。
308、AMF向V-SMF发送更新上下文请求消息:
AMF可以根据步骤304中事件的订阅生成下行数据通知失败(downlink data notification failure)通知指示信息,该指示信息用于指示当发生下行数据通知失败事 件时,上报该事件。
AMF向V-SMF发送Nsmf_PDUSession_UpdateSMContext Request消息,订阅下行数据通知失败事件。
消息中携带步骤304中接收到NEF通知关联标识、三元组信息和上述下行数据通知失败(downlink data notification failure)通知指示信息。在本实施例中,下行数据通知失败通知指示信息也可称为事件订阅类型指示信息。
309、V-SMF向第二SMF发送更新请求消息:
当V-SMF确定数据需要缓存在UPF时,V-SMF可以确定需要向PCF请求PCC规则,此时V-SMF可以生成UPF缓存数据的指示或请求PCC的指示。
V-SMF向SMF发送Nsmf_PDUSession_Update Request消息,订阅下行数据通知失败事件。
消息中携带步骤308中接收到的NEF通知关联标识、三元组信息和下行数据通知失败(downlink data notification failure)通知指示信息,以及上述UPF缓存数据的指示或请求PCC的指示。
310、第二SMF向V-SMF返回确认消息:
311、V-SMF向AMF返回确认消息:
步骤312至315有两种实现方式,具体如下:
A:消息中携带通知控制指示信息,用于生成对应的策略规则,具体的实现方式为:
312、第二SMF确定需要请求用于处理数据的策略规则,并向PCF发送更新请求消息:
由于在步骤309中接收到UPF缓存数据的指示或请求PCC的指示,第二SMF可以确定需要向PCF请求PCC规则。并且之前PCF提供了携带数据描述的下行数据通知失败事件订阅的PCRT,第二SMF可以向PCF发送Npcf_SMPolicyControl_Update请求,请求用于处理数据的策略规则。消息中携带步骤309中接收到的三元组信息和携带数据描述的下行数据通知失败事件订阅的PCRT。
在本申请实施例中,该PCRT也可称为事件订阅类型指示信息,本申请实施例中,事件订阅类型指示信息用于表示事件订阅的类型。
可选地,消息中还可以携带操作指示Create,表示该消息用于请求新的PCC规则。
在本申请实施例中,步骤312也可以在步骤310或311之前执行,只要在步骤309之后执行即可,具体此处不作限定。
313、PCF制定PCC规则,并向第二SMF发送第三策略规则:
步骤313的A实现方式与图2所实施示例的步骤212的A实现方式类似,此处不再赘述。
314、第二SMF接收第三策略规则,生成第一N4信息(N4 information),并向V-SMF发送第一策略规则:
第二SMF在步骤313中接收到PCC规则(第三策略规则),由于该PCC规则是根据步骤312消息中的三元组信息生成的,而该三元组信息又是在步骤309中接收更新上下文请求消息时与NEF通知关联标识一同获取的,因此第二SMF可以据此确定并保存NEF通知关联 标识和PCC规则标识的对应关系。在后续对下行数据通知失败订阅进行更新或删除时,可以根据该对应关系查找到该事件所对应的PCC规则标识,从而向PCF发出相应的指令,使PCF更新或删除该PCC规则标识所对应的PCC规则。
第二SMF根据PCC规则确定携带第一PDR的第一N4信息。步骤313的PCC规则或确认消息中包括DDN Failure通知控制指示信息,因此第一N4信息中也可以包括DDN Failure通知控制指示信息,第一PDR是根据上述PCC规则确定的,与上述PCC规则携带相同的优先级信息和过滤器模板。
第二SMF向V-SMF返回确认消息,消息中携带上述第一N4信息。在本申请实施例中,事件订阅的过程中生成的第一N4信息也可以称为第一策略规则。
可选的,DDN Failure通知控制指示信息也可以不包括在第一N4信息中,而是携带于上述确认消息中,具体此处不做限定。
315、V-SMF向UPF发送第二N4信息(第二策略规则):
步骤315的A实现方式与图2所实施示例的步骤214的A实现方式类似,此处不再赘述。
B:消息中不携带通知控制指示信息,根据事件的订阅生成对应的策略规则,具体的实现方式为:
312、第二SMF确定需要请求用于处理数据的策略规则,并向PCF发送更新请求消息:
由于之前PCF提供了携带数据描述的下行数据通知失败事件订阅的PCRT,第二SMF可以向PCF发送Npcf_SMPolicyControl_Update请求,请求用于处理数据的策略规则。消息中携带步骤309中接收到的三元组信息和携带数据描述的下行数据通知失败事件订阅的PCRT。
可选地,消息中还可以携带操作指示Create,表示该消息用于请求新的PCC规则。
在本申请实施例中,步骤312也可以在步骤310或311之前执行,只要在步骤309之后执行即可,具体此处不作限定。
313、PCF制定PCC规则,并向第二SMF发送第三策略规则:
步骤313的B实现方式与图2所实施示例的步骤212的B实现方式类似,此处不再赘述。
314、第二SMF接收第三策略规则,生成第一N4信息(N4 information),并向V-SMF发送第一策略规则:
第二SMF在步骤313中接收到PCC规则(第三策略规则),由于该PCC规则是根据步骤312消息中的三元组信息生成的,而该三元组信息又是在步骤309中接收更新上下文请求消息时与NEF通知关联标识一同获取的,因此第二SMF可以据此确定并保存NEF通知关联标识和PCC规则标识的对应关系。在后续对下行数据通知失败订阅进行更新或删除时,可以根据该对应关系查找到该事件所对应的PCC规则标识,从而向PCF发出相应的指令,使PCF更新或删除该PCC规则标识所对应的PCC规则。
第二SMF根据PCC规则确定携带第一PDR的第一N4信息。第一PDR是根据上述PCC规则确定的,与上述PCC规则携带相同的优先级信息和过滤器模板。
第二SMF向V-SMF返回确认消息,消息中携带上述第一N4信息。在本申请实施例中,事件订阅的过程中生成的第一N4信息也可以称为第一策略规则。
315、V-SMF向UPF发送第二N4信息(第二策略规则):
步骤315的B实现方式与图2所实施示例的步骤214的B实现方式类似,此处不再赘述。
316-320:
步骤316至320与图2所示实施例的步骤215至219类似,此处不再赘述。
除了对事件的订阅,本申请实施例还提供了订阅成功后对事件的更新和删除,接下来就对更新和删除的过程进行描述:
2、更新下行数据通知失败后可达事件:
在本申请实施例中,事件更新时提供的数据描述信息称为第二数据描述信息。在本实施例或图4b所示实施例中,数据描述信息为第二数据描述信息。本实施例和图4b所示实施例以三元组信息为例,该三元组信息并不造成对第二数据描述信息的限定。
请参阅图4a,基于图2对下行数据通知失败后可达事件的订阅,本实施例中提供了更新上述事件时,获取对应的策略规则的流程,对于PDU会话存在I-SMF的场景,将V-SMF替换为I-SMF即可,具体此处不做限定,该流程包括:
401a、UE接入网络,建立PDU会话:
此时AF已经根据图2所示实施例完成了对下行数据通知失败后可达事件的订阅。
402a、AF向NEF发送订阅请求消息:
AF向NEF发送Nnef_EventExposure_Subscribe Request消息,请求更新下行数据通知失败后可达(availability of downlink data notification failure)事件订阅。
消息中携带NEF订阅关联标识,以及更新的三元组信息,在本实施例中,将用该三元组信息代替原来订阅时的第一数据描述信息,生成对应于该三元组信息的策略规则。本实施例或图4b所实施示例中,三元组信息也称为第二数据描述信息或第二描述信息。NEF订阅关联标识是NEF在事件订阅的过程中生成的。
403a、NEF向UDM发送订阅请求消息:
NEF向UDM发送Nudm_EventExposure_Subscribe Request消息,请求更新下行数据通知失败后可达事件订阅。
消息中携带UDM订阅关联标识和步骤402a中接收到的三元组信息。UDM订阅关联标识是UDM在事件订阅的过程中生成的。
404a、UDM向UE注册的AMF发送订阅请求消息:
UDM向UE注册的AMF发送Namf_EventExposure_Subscribe Request消息,请求更新下行数据通知失败后可达事件订阅。
消息中携带AMF订阅关联标识和上述三元组信息。AMF订阅关联标识是AMF在事件订阅的过程中生成的。
405a、AMF向UDM返回确认消息:
AMF根据步骤404a中接收到的AMF订阅关联标识和三元组信息更新该事件的订阅信息, 并向UDM返回确认消息。
406a、UDM向NEF返回确认消息:
接收到AMF发送的确认消息后,UDM可以根据步骤403a中接收到的UDM订阅关联标识和三元组信息更新该事件的订阅信息,并向NEF返回确认消息。
407a、NEF向AF返回确认消息:
接收到UDM发送的确认消息后,NEF可以根据步骤402a中接收到的NEF订阅关联标识和三元组信息更新该事件的订阅信息,并向AF返回确认消息。
在本申请实施例中,步骤406a也可以在步骤404a或步骤405a之前执行,只要在步骤403a之后执行;步骤407a也可以在步骤403a至406a中的任一步之前执行,只要在步骤402a之后执行即可,此处不作限定。
408a、AMF向V-SMF发送第三消息:
AMF向V-SMF发送Nsmf_PDUSession_UpdateSMContext Request消息,请求更新下行数据通知失败的事件订阅。在本实施例中,该消息也可以称为第三消息。本申请实施例中,第三消息用于向V-SMF请求更新事件的订阅。
消息中携带NEF通知关联标识和上述三元组信息。NEF通知关联标识是在事件订阅过程中接收到的。
409a、V-SMF向AMF返回确认消息。
V-SMF根据上述NEF通知关联标识和三元组信息更新该事件的订阅信息,并向AMF返回确认消息。
步骤410a至414a有两种实现方式,具体如下:
A:消息中携带通知控制指示信息,用于生成对应的策略规则,具体的实现方式为:
410a、V-SMF向第二SMF发送第四消息:
步骤408a中V-SMF接收到第三消息,可以根据NEF通知关联标识确定下行数据通知失败事件,根据该消息确定需要更新该事件的订阅。在本申请实施例中,NEF通知关联标识也可称为第三标识,用于标识第一事件的订阅。
V-SMF向第二SMF发送Nsmf_PDUSession_Update Request消息,该消息用于请求更新第一N4信息。在本实施例中,该消息也可以称为第四消息。本申请实施例中,第四消息用于向第二SMF请求更新订阅事件所对应的用于处理数据的策略规则。
消息中携带三元组信息、事务标识以及DDN_Failure指示信息。DDN_Failure指示信息也称为事件订阅类型指示信息,是在事件订阅的过程中生成的,用于指示事件订阅的类型。
在本申请实施例中,步骤410a也可以在步骤409a之前执行,只要在步骤408a之后执行即可,具体此处不作限定。
411a、第二SMF向PCF发送第八消息:
在事件订阅的过程中,第二SMF将事务标识和PCC规则标识之间的对应关系保存了下来,此时第二SMF就可以根据事务标识确定对应的PCC规则标识。
第二SMF向PCF发送Npcf_SMPolicyControl_Update请求消息,该消息用于请求更新 上述PCC规则标识对应的PCC规则。在本实施例中,该消息也可以称为第八消息。本申请实施例中,第八消息用于向PCF请求更新PCC规则。
消息中携带三元组信息、PCC规则标识,以及在事件订阅的过程中接收到的PCRT。
可选地,消息中还可以携带操作指示Modify,表示该消息用于请求更新的PCC规则。
412a、PCF跟据三元组信息更新PCC规则,并向第二SMF发送第五策略规则:
PCF根据三元组信息更新PCC规则,即在PCC规则中的过滤器模板中包括该三元组信息。可选地,PCC规则中可以包括DDN Failure通知控制指示信息。该DDN Failure通知控制指示信息是事件订阅的过程中生成的,PCF可以通过该指示信息与PCC规则标识的对应关系确定该指示信息;DDN Failure通知控制指示信息也可以是PCF根据上述DDN_Failure指示信息生成的,具体此处不作限定。
PCF向第二SMF返回确认消息,消息中携带更新后的PCC规则。在本申请实施例中,事件订阅的过程中生成的PCC规则也可以称为第三策略规则。
可选地,DDN Failure通知控制指示信息还可以携带于该确认消息中,具体此处不作限定。
413a、第二SMF更新第一N4信息(N4 information),并向V-SMF发送第四策略规则:
第二SMF根据PCC规则更新携带第一PDR的第一N4信息。第一N4信息中还包括DDN Failure通知控制指示信息,第一PDR是根据上述PCC规则确定的,与上述PCC规则携带相同的优先级信息和过滤器模板。
第二SMF向V-SMF返回确认消息,消息中携带上述第一N4信息。可选地,DDN Failure通知控制指示信息还可以携带于该确认消息中,具体此处不作限定。
414a、V-SMF向UPF发送第二N4信息:
由于步骤413a中的第一N4信息或确认消息中包括DDN Failure通知控制指示信息,因此V-SMF确定该第一N4信息用于检测下行数据失败通知事件。V-SMF根据第一N4信息确定第二N4信息。
V-SMF根据第一N4信息确定第二N4信息。具体如下:
当V-SMF接收到AMF的UE不可达通知时,V-SMF可以根据第一PDR确定第二PDR。第二PDR是根据上述第一PDR生成的,包括与上述第一PDR相同的过滤器模板和优先级信息。V-SMF可以根据DDN Failure通知控制指示信息和第二PDR确定关联的FAR。FAR用于指示UPF丢弃与第二PDR匹配的数据包并进行报告。
当V-SMF接收到AMF的UE处于空闲状态的通知时,V-SMF可以根据第一PDR确定第二PDR,第二PDR是根据上述第一PDR生成的,包括与上述第一PDR相同的过滤器模板和优先级信息。V-SMF可以根据DDN Failure通知控制指示信息和第二PDR确定关联的FAR和URR。FAR用于指示UPF丢弃缓存的与第二PDR匹配的数据,URR用于指示UPF当丢弃缓存的与第二PDR匹配的数据包时进行报告。
具体的,生成第二PDR的过程,可以是直接将第一PDR作为第二PDR,生成第二PDR也可以通过其他方式,例如对第一PDR进行格式变换,生成第二PDR,具体此处不作限定。
V-SMF向UPF发送第二N4信息(N4 information),第二N4信息包括上述第二PDR、 FAR和URR。在本申请实施例中,事件订阅的过程中生成的第二N4信息也可以称为第二策略规则。
B:消息中不携带通知控制指示信息,根据事件的订阅生成对应的策略规则,具体的实现方式为:
410a、V-SMF确定需要请求更新用于处理数据的策略规则,并向第二SMF发送第四消息:
步骤408a中V-SMF接收到第三消息,可以根据第三消息中的NEF通知关联标识确定下行数据通知失败事件,根据该消息确定需要更新该事件的订阅。在本申请实施例中,NEF通知关联标识也可称为第三标识,用于标识第一事件的订阅。
V-SMF向第二SMF发送Nsmf_PDUSession_Update Request消息,该消息用于请求更新第一N4信息。在本实施例中,该消息也可以称为第四消息。消息中携带三元组信息和事务标识。该事务标识是事件订阅时生成的,用于表示第一SMF和第二SMF之间的事件,具体在本实施例中对应于下行数据通知失败事件的订阅。
在本申请实施例中,步骤410a也可以在步骤409a之前执行,只要在步骤408a之后执行即可,具体此处不作限定。
411a、第二SMF向PCF发送第八消息:
在事件订阅的过程中,第二SMF将事务标识和PCC规则标识之间的对应关系保存了下来,此时第二SMF就可以根据事务标识确定对应的PCC规则标识。
第二SMF向PCF发送Npcf_SMPolicyControl_Update请求消息,该消息用于请求更新上述PCC规则标识对应的PCC规则。在本实施例中,该消息也可以称为第八消息。
消息中携带三元组信息和PCC规则标识。可选的,消息中可以携带PCRT。
可选地,消息中还可以携带操作指示Modify,表示该消息用于请求更新的PCC规则。
412a、PCF跟据三元组信息更新PCC规则,并向第二SMF发送第五策略规则:
PCF根据三元组信息更新PCC规则,即在PCC规则中的过滤器模板中包括该三元组信息。
PCF向第二SMF返回确认消息,消息中携带更新后的PCC规则。在本申请实施例中,事件更新的过程中生成的PCC规则也可以称为第五策略规则。
413a、第二SMF更新第一N4信息(N4 information),并向V-SMF发送第四策略规则:
第二SMF根据PCC规则更新携带第一PDR的第一N4信息。第一PDR是根据上述PCC规则确定的,与上述PCC规则携带相同的优先级信息和过滤器模板。
在步骤412a中,第二SMF接收到的PCC规则中包括PCC规则标识,由于订阅时第二SMF保存了PCC规则标识与事务标识之间的对应关系,此时第二SMF就可以根据该PCC规则标识确定PCC规则对应的事务标识。
第二SMF向V-SMF返回确认消息,消息中携带上述第一N4信息和上述事务标识。在本申请实施例中,事件更新的过程中生成的第一N4信息也可以称为第四策略规则。
414a、V-SMF向UPF发送第二N4信息:
V-SMF可以根据步骤413a中接收到的事务标识将第一N4信息和下行数据通知失败事 件订阅关联,确定第一N4信息用于检测下行数据通知失败事件。V-SMF根据第一N4信息和下行数据失败通知事件订阅确定第二N4信息。
V-SMF根据第一N4信息和下行数据通知失败事件订阅确定第二N4信息。具体如下:
当V-SMF接收到AMF的UE不可达通知时,V-SMF可以根据第一PDR确定第二PDR。第二PDR是根据上述第一PDR生成的,包括与上述第一PDR相同的过滤器模板和优先级信息。V-SMF可以根据下行数据通知失败事件订阅和第二PDR确定关联的FAR。
当V-SMF接收到AMF的UE处于空闲状态的通知时,V-SMF可以根据第一PDR确定第二PDR,第二PDR是根据上述第一PDR生成的,包括与上述第一PDR相同的过滤器模板和优先级信息。V-SMF可以根据下行数据通知失败事件订阅和第二PDR确定关联的FAR和URR。FAR用于指示UPF丢弃缓存的与第二PDR匹配的数据,URR用于指示UPF当丢弃缓存的与第二PDR匹配的数据包时进行报告。
具体的,生成第二PDR的过程,可以是直接将第一PDR作为第二PDR,生成第二PDR也可以通过其他方式,例如对第一PDR进行格式变换,生成第二PDR,具体此处不作限定。
V-SMF向UPF发送第二N4信息(N4 information),第二N4信息包括上述第二PDR、FAR和URR。在本申请实施例中,事件订阅的过程中生成的第二N4信息也可以称为第二策略规则。
415a-419a:
步骤415a至步骤419a与图2所实施示例的步骤215至219类似,此处不再赘述。
请参阅图4b,基于图3对下行数据通知失败后可达事件的订阅,本实施例中提供了更新上述事件时,获取对应的策略规则的流程,对于PDU会话存在I-SMF的场景,将V-SMF替换为I-SMF即可,具体此处不做限定,该流程包括:
401b、UE接入网络,建立PDU会话:
此时AF已经根据图3所示实施例完成了对下行数据通知失败后可达事件的订阅。
402b-407b:
步骤402b至步骤407b与图4a所实施示例的步骤402a至步骤407a类似,此处不再赘述。
在本申请实施例中,步骤406b也可以在步骤404b或步骤405b之前执行,只要在步骤403b之后执行;步骤407b也可以在步骤403b至406b中的任一步之前执行,只要在步骤402b之后执行即可,此处不作限定。
408b、AMF向V-SMF发送更新上下文请求消息:
AMF向V-SMF发送Nsmf_PDUSession_UpdateSMContext Request消息,请求更新下行数据通知失败的事件订阅。
消息中携带NEF通知关联标识和上述三元组信息。NEF通知关联标识是在事件订阅的过程中接收到的。
409b、V-SMF向第二SMF发送更新请求消息:
V-SMF向第二SMF发送Nsmf_PDUSession_Update Request消息,请求更新下行数据通知失败的事件订阅。
消息中携带NEF通知关联标识和上述三元组信息。
410b、第二SMF向V-SMF返回确认消息。
411b、V-SMF向AMF返回确认消息。
步骤412b至415b有两种实现方式,具体如下:
A:消息中携带通知控制指示信息,用于生成对应的策略规则,具体的实现方式为:
412b、第二SMF确定需要请求更新用于处理数据的策略规则,并向PCF发送更新的三元组信息:
步骤409b中第二SMF接收到更新请求消息,可以根据消息中的NEF通知关联标识确定下行数据通知失败事件,根据该消息确定需要更新该事件的订阅。在本申请实施例中,NEF通知关联标识也可称为第三标识,用于标识第一事件的订阅。
在事件订阅过程中,第二SMF将NEF通知关联标识和PCC规则标识之间的对应关系保存了下来,NEF通知关联标识又对应于事件的订阅,此时第二SMF就可以确定事件订阅对应的PCC规则标识。
第二SMF向PCF发送Npcf_SMPolicyControl_Update请求消息,该消息用于请求更新上述PCC规则标识对应的PCC规则。
消息中携带三元组信息和PCC规则标识。以及DDN Failure指示信息。DDN Failure指示信息也称为事件订阅类型指示信息,是在事件订阅的过程中生成的,用于指示事件订阅的类型。
可选地,消息中还可以携带操作指示Modify,表示该消息用于请求更新的PCC规则。
在本申请实施例中,步骤412b也可以在步骤410b或411b之前执行,只要在步骤409b之后执行即可,具体此处不作限定。
413b-415b:
步骤413b至步骤415b的A实现方式与图4a所实施示例的步骤412a至步骤414a的A实现方式类似,此处不再赘述。
B:消息中不携带通知控制指示信息,根据事件的订阅生成对应的策略规则,具体的实现方式为:
412b、第二SMF确定需要请求更新用于处理数据的策略规则,并向PCF发送更新的三元组信息:
步骤409b中第二SMF接收到更新请求消息,可以根据消息中的NEF通知关联标识确定下行数据通知失败事件,根据该消息确定需要更新该事件的订阅。在本申请实施例中,NEF通知关联标识也可称为第三标识,用于标识第一事件的订阅。
在事件订阅的过程中,第二SMF将事务标识和PCC规则标识之间的对应关系保存了下来,事务标识又对应于事件的订阅,此时第二SMF就可以确定事件订阅对应的PCC规则标识。
第二SMF向PCF发送Npcf_SMPolicyControl_Update请求消息,该消息用于请求更新上述PCC规则标识对应的PCC规则。
消息中携带三元组信息和PCC规则标识。
可选的,消息中可以携带上述PCRT。
可选地,消息中还可以携带操作指示Modify,表示该消息用于请求更新的PCC规则。
在本申请实施例中,步骤412b也可以在步骤410b或411b之前执行,只要在步骤409b之后执行即可,具体此处不作限定。
413b-415b:
步骤413b至步骤415b的B实现方式与图4a所实施示例的步骤412a至步骤414a的B实现方式类似,此处不再赘述。
416b-420b:
步骤416b至步骤420b与图4a所实施示例的步骤415a至步骤419a类似,此处不再赘述。
在图4a及图4b所示实施例中,第一SMF、第二SMF和PCF根据事件订阅类型指示信息和通知控制指示信息,或数据描述信息标识、PCC规则标识和订阅事件之间的关联关系,将订阅事件相关的PCC规则、第一PDR、第二PDR和FAR、URR,更新成根据第二数据描述信息生成的对应的策略规则,实现了对事件的策略规则的更新。
3、删除下行数据通知失败后可达事件:
请参阅图5a,基于图2对下行数据通知失败后可达事件的订阅,本实施例中提供了删除上述事件时,删除该事件订阅的流程,对于PDU会话存在I-SMF的场景,将V-SMF替换为I-SMF即可,具体此处不做限定,该流程包括:
501a、UE接入网络,建立PDU会话:
与图4a所实施示例中的步骤401a一致,此处不再赘述。
502a、AF向NEF发送去订阅请求消息:
AF向NEF发送Nnef_EventExposure_Unsubscribe Request消息,请求删除下行数据传递失败后可达事件的订阅。
消息中携带在事件订阅过程中接收到的NEF订阅关联标识。
503a、NEF向UDM发送订阅请求消息:
NEF向UDM发送Nudm_EventExposure_Unsubscribe Request消息,请求删除下行数据传递失败后可达事件的订阅。
消息中携带在事件订阅过程中接收到的UDM订阅关联标识。
504a、UDM向UE注册的AMF发送订阅请求消息:
UDM向UE注册的AMF发送Namf_EventExposure_Unsubscribe Request消息,请求删除下行数据传递失败后可达事件的订阅。
消息中携带在事件订阅过程中接收到的AMF订阅关联标识。
505a、AMF向UDM返回确认消息。
506a、UDM向NEF返回确认消息。
507a、NEF向AF返回确认消息。
508a、AMF向V-SMF发送第五消息:
AMF向V-SMF发送Nsmf_PDUSession_UpdateSMContext Request消息,请求删除下行 数据通知失败事件。
消息中携带去订阅指示和在事件订阅过程中接收到的NEF通知关联标识(Notification Correlation Id)。
在本申请实施例中,步骤506a也可以在步骤504a或步骤505a之前执行,只要在步骤503a之后执行;步骤507a也可以在步骤503a至506a中的任一步之前执行,只要在步骤502a之后执行即可;步骤508a也可以在步骤505a至507a中的任一步之前执行,只要在步骤504a之后执行即可,此处不作限定。
509a、V-SMF向AMF返回确认消息。
510a、V-SMF确定需要请求删除第一N4信息,并向第二SMF发送第六消息:
V-SMF可以根据步骤508a中的NEF通知关联标识确定下行数据传递失败事件,并根据去订阅指示确定需要删除该事件的订阅,从而确定需要请求删除第一N4信息。在本申请实施例中,NEF通知关联标识也可称为第三标识,用于标识第一事件的订阅。
在订阅的过程中,V-SMF保存了事件订阅和事务标识之间的对应关系,此时就可以查询到该事件订阅对应的事务标识。
具体的,V-SMF向SMF发送Nsmf_PDUSession_Update Request消息,消息中携带请求删除第一N4信息的指示。在本实施例中,该消息也称为第六消息,第六消息用于请求删除第一N4信息。
消息中携带事务标识和操作指示delete。
在本申请实施例中,步骤510a也可以在步骤509a之前执行,只要在步骤508a之后执行即可,此处不作限定。
511a、第二SMF向PCF发送第九消息:
在事件订阅过程中,第二SMF将事务标识和PCC规则标识之间的对应关系保存了下来,此时第二SMF就可以根据事务标识确定对应的PCC规则标识。
第二SMF向PCF发送Npcf_SMPolicyControl_Update请求,请求删除PCC规则。
消息中携带PCC规则标识和操作指示delete。
512a、PCF删除PCC规则,并向SMF返回确认消息:
PCF可以根据步骤511a中接收到的PCC规则标识删除与该PCC规则标识对应的PCC规则。
PCF向第二SMF返回确认消息,消息中携带删除PCC规则标识对应的PCC规则的指示,具体的,消息中可以包括PCC规则标识和删除指示。
513a、第二SMF删除第一N4信息,并向V-SMF发送删除第一N4信息的指示:
第二SMF根据删除的PCC规则标识删除保存在第二SMF本地的第一N4信息,并向V-SMF发送删除第一N4信息的指示。
514a、V-SMF与UPF交互删除对应的PDR、FAR和URR。
V-SMF根据接收到的删除第一N4信息的指示确定需要删除第二N4信息,V-SMF与UPF交互删除第二N4信息对应的PDR、FAR和URR。
请参阅图5b,基于图3对下行数据通知失败后可达事件的订阅,本实施例中提供了删 除上述事件时,删除该事件订阅的流程,对于PDU会话存在I-SMF的场景,将V-SMF替换为I-SMF即可,具体此处不做限定,该流程包括:
501b、UE接入网络,建立PDU会话:
此时AF已经根据图3所示实施例完成了对下行数据通知失败后可达事件的订阅。
502b-507b:
步骤502b至步骤507b与图5a所实施示例的步骤502a至步骤507a类似,此处不再赘述。
508b、AMF向V-SMF发送更新上下文请求消息:
AMF向V-SMF发送Nsmf_PDUSession_UpdateSMContext Request消息,请求删除下行数据通知失败事件。
消息中携带去订阅指示和在事件订阅过程中接收到的NEF通知关联标识。
509b、V-SMF向第二SMF发送更新请求消息:
V-SMF向第二SMF发送Nsmf_PDUSession_Update Request消息,请求删除下行数据通知失败事件。
消息中携带NEF通知关联标识和去订阅指示。
需要注意的是,步骤509b中的去订阅指示可以根据步骤508b中的去订阅指示生成,或者就是步骤508b中的去订阅指示,具体此处不作限定。
510b、第二SMF向V-SMF返回确认消息。
511b、V-SMF向AMF返回确认消息。
512b、第二SMF确定需要请求删除用于处理数据的策略规则,并向PCF发送删除PCC规则的请求:
步骤509b中,第二SMF接收到更新请求消息,第二SMF可以根据该请求中的NEF通知关联标识确定下行数据传递失败事件,并根据去订阅指示确定需要删除该事件的订阅,从而确定需要请求删除PCC规则。在本申请实施例中,NEF通知关联标识也可称为第三标识,用于标识第一事件的订阅。
在事件订阅过程中,第二SMF将NEF通知关联标识和PCC规则标识之间的对应关系保存了下来,NEF通知关联标识又对应于事件的订阅,此时第二SMF就可以确定事件订阅对应的PCC规则标识。
第二SMF向PCF发送Npcf_SMPolicyControl_Update请求,请求删除PCC规则。
消息中携带PCC规则标识和操作指示delete。
在本申请实施例中,步骤512b也可以在步骤510b或511b之前执行,只要在步骤509b之后执行即可,此处不作限定。
513b-515b:
步骤513b至步骤515b与图5a所实施示例的步骤512a至514a类似,此处不再赘述。
在图5a及图5b所示实施例中,第一SMF、第二SMF和PCF根据数据描述信息标识、PCC规则标识和订阅事件之间的关联关系,将事件订阅相关的PCC规则、第一PDR、第二PDR和FAR、URR等策略规则删除,实现了对事件的策略规则的删除。
值得注意的是,在本申请实施例中,事件标识也可以是其他事件的标识,例如下行数据传递状态事件,不同的事件标识代表不同的订阅事件,相应的就会生成不同的PCC规则和策略规则,网元也会相应的执行不同的操作,具体此处不作限定。
接下来就对网络提供策略规则的过程举例说明,该策略规则为下行数据传递状态事件的策略规则。在本申请实施例中,下行数据传递状态事件也可称为下行数据传输状态事件或下行数据通知状态事件,在本申请实施例中,该事件也称为第一事件。
二、获取下行数据传递状态事件的策略规则:
1、订阅下行数据传递状态事件:
请参阅图6,当UE处于漫游状态,即V-SMF无法与PCF直接交互时,AF订阅下行数据传递状态事件,由第一SMF来向PCF请求PCC规则。对于PDU会话存在I-SMF的场景,将V-SMF替换为I-SMF即可,具体此处不做限定。本申请实施例中提供策略规则的一个流程包括:
601、UE接入网络,建立PDU会话:
UE接入网络并建立PDU会话,PDU会话建立了UE到UPF的数据通道。UE可以通过这个数据通道和应用服务器交互。
可选地,在PDU会话建立或者修改的过程中,PCF可以向第二SMF发送策略控制请求触发器(PCRT,policy control request trigger),该触发器为携带数据描述的下行数据传递状态事件订阅(downlink data delivery status event subscribed with traffic descriptor)。该PCRF用于指示第二SMF当接收到携带数据描述的下行数据传递状态事件订阅时,向PCF请求PCC规则。
在本申请实施例中,该PCRT也称为下行数据通知事件订阅触发器。
可选地,在PDU会话建立或者修改的过程中,PCF可以向第二SMF发送报告接收到下行数据通知事件订阅的指示信息。在本申请实施例中,该指示信息也称为第一请求策略指示信息。
进一步的,第二SMF可以根据携带数据描述的下行数据通知失败事件订阅的PCRT,将确定策略计费控制应用于所述UE的指示信息、报告接收到下行数据通知失败事件订阅的指示信息或报告接收到数据描述信息的指示信息发送给V-SMF。
在本申请实施例中,上述指示信息也可以称为请求策略指示信息或第二请求策略指示信息,用于指示第一SMF获取与订阅事件所对应的策略规则。
602、AF向NEF发送订阅请求消息:
AF向NEF发送Nnef_EventExposure_Subscribe Request消息,订阅下行数据传递状态(downlink data delivery status)事件。
消息中携带事件标识(event id)、AF通知端点(AF notification endpoint)、三元组信息、用户的外部标识或外部用户组标识,以及丢弃的传递状态。
在本申请实施例中,除了丢弃的传递状态,订阅的传递状态还可以是缓存或传送,本实施例以丢弃的传递状态为例,并不造成对订阅的传递状态的限定。
在本申请实施例中,事件订阅时提供的数据描述信息称为第一数据描述信息,事件更 新时提供的数据描述信息称为第二数据描述信息。在本实施例或图7所示实施例中,数据描述信息为第一数据描述信息。
事件标识(event id)表示订阅的事件,在本实施例中为下行数据传递状态事件的标识。
AF通知端点用于指示AF接收事件通知的端点,AF通知端点可以包括AF通知目标地址(AF notification target address)。当AF为多个订阅通知分配相同的AF通知目标地址时,可以通过AF通知关联标识来区分不同的订阅,此时AF通知端点包括AF通知目标地址(AF notification target address)和AF通知关联标识(AF notification correlation Id)。
603、NEF向UDM发送订阅请求消息:
NEF向UDM发送Nudm_EventExposure_Subscribe Request消息,订阅下行数据传递状态事件。
消息中携带步骤602中接收到的事件标识、三元组信息、丢弃的传递状态和用户的外部标识或外部用户组标识,以及NEF用于接收订阅通知的NEF通知端点(NEF notification endpoint)。
NEF通知端点用于指示NEF用于接收订阅通知的端点,NEF通知端点可以包括NEF通知目标地址(NEF notification target address)和NEF通知关联标识(NEF notification correlation Id)。当NEF为多个订阅通知分配相同的NEF通知目标地址时,可以通过NEF通知关联标识来区分不同的事件。
604、UDM向UE注册的第二SMF发送订阅请求消息:
UDM在步骤603中接收到用户外部标识,就可以根据外部标识确定用户内部标识。
在本申请实施例中,当事件订阅针对多个用户时,步骤602及603中用户的外部标识也可以是外部用户组标识,外部用户组标识表示每一个上述用户,此时就可以根据该外部用户组标识确定每个上述用户的内部标识,具体此处不作限定。
UDM可以根据保存在本地的对应关系,以及用户内部标识,确定UE注册的第二SMF,并向UE注册的第二SMF发送Nsmf_EventExposure_Subscribe Request消息,订阅下行数据传递状态事件。
消息中携带步骤203中接收到的事件标识、三元组信息、NEF通知端点、丢弃的传递状态,以及上述用户内部标识。
若步骤603中接收到用户组标识,则UDM可以为用户组中的每一个UE向UE注册的第二SMF发送上述消息。
605、第二SMF向V-SMF发送第一消息:
第二SMF向UE注册的V-SMF发送Nsmf_EventExposure_Subscribe Request消息,订阅下行数据传递状态事件。在本实施例中,该消息也可称为第一消息;
消息中携带步骤604中接收到的事件标识、NEF通知关联标识、三元组信息、丢弃的传递状态,以及上述用户内部标识。
若步骤604中接收到用户组标识,则第二SMF可以为用户组中的每一个UE向UE注册的V-SMF发送上述消息。
606、V-SMF向第二SMF返回确认消息:
V-SMF根据步骤605中接收到的事件标识分配SMF订阅关联标识(SMF subscription correlation id),SMF订阅关联标识用来标识下行数据传递状态事件,表示该事件已在V-SMF处订阅成功。
V-SMF保存接收到的信息,并向第二SMF返回确认消息,消息中携带上述SMF订阅相关标识。
607、第二SMF向UDM返回确认消息:
第二SMF根据步骤604中接收到的事件标识分配SMF订阅关联标识(SMF subscription correlation id),SMF订阅关联标识用来标识下行数据传递状态事件,表示该事件已在第二SMF处订阅成功。
第二SMF保存接收到的信息,并向UDM返回确认消息,消息中携带上述SMF订阅相关标识。
步骤607也可在步骤605或606之前执行,只要在步骤603之后执行即可。
608、UDM向NEF返回确认消息:
UDM为事件订阅分配UDM订阅关联标识(UDM subscription correlation id),UDM订阅关联标识用来标识下行数据传递状态事件,表示该事件已在UDM处订阅成功。
UDM向NEF返回确认消息,确认消息中携带上述UDM订阅关联标识。
609、NEF向AF返回确认消息:
NEF为事件订阅分配NEF订阅关联标识(NEF subscription correlation id),NEF订阅关联标识用来标识下行数据传递状态事件,表示该事件订阅已在NEF处订阅成功。
NEF保存接收到的信息,并向AF返回确认消息,确认消息中携带上述NEF订阅关联标识。
在本申请实施例中,步骤608可在步骤604至607中任一步之前执行,只要在步骤603之后执行即可;步骤609可在步骤603至608中的任一步之前执行,只要在步骤602之后执行即可,具体此处不作限定。
步骤610至614有两种实现方式,具体如下:
A:消息中携带通知控制指示信息,用于生成对应的策略规则,具体的实现方式为:
610、V-SMF确定需要请求用于处理数据的策略规则,并向第二SMF发送第二消息:
在步骤601中,V-SMF接收到策略计费控制应用于所述UE的指示信息、报告接收到下行数据传递状态事件订阅的指示信息或报告接收到数据描述信息的指示信息,V-SMF可以确定PCC应用于该PDU会话,并且当V-SMF确定数据需要缓存在UPF时,也就能确定需要向第二SMF报告接收到的事件订阅以及请求用于在UPF对数据进行处理的策略。
V-SMF可以为该事件分配事务标识(Transaction Id),事务标识用来表示V-SMF和第二SMF之间的事务,用于后续的修改和删除操作。在本申请实施例中,事务标识也可称为第一标识信息。在本申请实施例中,事务标识对应于第一事件的订阅,事务标识也可用于标识针对第一事件订阅的策略规则请求。本实施例中,事务标识对应于下行数据传递状态事件的订阅。
V-SMF还可以根据步骤605中事件的订阅分配下行数据传递状态指示信息,下行数据传递状态指示信息用于指示接收到的事件订阅类型为下行数据传递状态订阅。
下行数据传递状态指示信息在本实施例中也称为事件订阅类型指示信息,用于指示事件订阅的类型。在本申请实施例中,事件订阅类型指示信息是根据事件的订阅生成的。
具体地,V-SMF向第二SMF发送Nsmf_PDUSession_Update Request消息,报告接收到的事件订阅,请求用于对数据进行检测的策略。消息中携带三元组信息,上述事务标识(Transaction Id)以及上述下行数据传递状态指示信息。在本实施例中,该消息也可以称为第二消息。
611、第二SMF向PCF发送第七消息:
步骤210中第二SMF接收的第二消息中同时包括三元组信息和事务标识。
接收到事务标识,第二SMF需要向PCF请求下行数据传递失败后可达的PCC规则,由于之前PCF提供了携带数据描述的下行数据传递状态事件订阅的PCRT,第二SMF可以向PCF发送Npcf_SMPolicyControl_Update请求消息。在本实施例中,该消息也可以称为第七消息。本申请实施例中,第七消息用于向PCF请求PCC规则。
第二SMF根据第二消息中的下行数据传递状态指示信息确定该消息用于请求用于检测下行数据传递状态事件的PCC规则,第二SMF就可以查找到步骤601中接收到的该事件所对应的PCRT。
消息中携带步骤610中接收到的三元组信息和下行数据传递状态指示信息以及PCRT。
可选地,消息中还可以携带操作指示Create,表示该消息用于请求新的PCC规则。
612、PCF制定PCC规则,并向第二SMF发送第三策略规则:
PCF根据步骤611中接收到的三元组信息制定PCC规则(PCC rule),即在PCC规则中的过滤器模板中包括该三元组信息,并且设置高优先级,PCC规则中包括PCC规则标识(PCC rule Id),PCC规则标识用来表示该PCC规则,在后续对PCC规则进行更新或删除时,可以根据该PCC规则标识确定对应的PCC规则,从而做出对PCC规则的变动。在本申请实施例中,PCC规则标识也可称为第二标识信息。
PCF还可以根据步骤611中接收到的PCRT确定下行数据传递状态通知控制指示信息,下行数据传递状态通知控制指示信息用于指示需要执行下行数据传递状态通知。下行数据传递状态通知控制指示信息可以包含在PCC规则中,用于指示该PCC规则用于检测下行数据传递状态事件。
下行数据传递状态通知控制指示信息在本实施例中也称为通知控制指示信息。
PCF向第二SMF返回确认消息,消息中携带上述PCC规则。在本申请实施例中,事件订阅的过程中生成的PCC规则也可以称为第三策略规则。
可选地,下行数据传递状态通知控制指示信息还可以不包含在PCC规则中,而是携带于该确认消息中,具体此处不做限定。
613、第二SMF接收第三策略规则,生成第一N4信息(N4 information),并向V-SMF发送第一策略规则:
当第二SMF接收到步骤612的PCC规则(第三策略规则),由于步骤610中的第二消息 中同时包括三元组信息和事务标识,而该PCC规则又是根据该三元组信息生成的,因此第二SMF可以据此确定并保存事务标识和PCC规则标识的对应关系。在后续对下行数据传递状态订阅进行更新或删除时,可以根据该对应关系查找到该事件所对应的PCC规则标识,从而向PCF发出相应的指令,使PCF更新或删除该PCC规则标识所对应的PCC规则。
第二SMF根据PCC规则确定携带第一PDR的第一N4信息。步骤612的PCC规则或确认消息中包括下行数据传递状态通知控制指示信息,因此第一N4信息中也可以包括下行数据传递状态通知控制指示信息,第一PDR是根据上述PCC规则确定的,与上述PCC规则携带相同的优先级信息和过滤器模板。
第二SMF向V-SMF返回确认消息,消息中携带上述第一N4信息。在本申请实施例中,事件订阅的过程中生成的第一N4信息也可以称为第一策略规则。
可选的,下行数据传递状态通知控制指示信息也可以不包括在第一N4信息中,而是携带于上述确认消息中,具体此处不做限定。
614、V-SMF向UPF发送第二N4信息(第二策略规则):
由于步骤613中的第一N4信息或确认消息中包括下行数据传递状态通知控制指示信息,因此V-SMF可以确定该第一N4信息用于检测下行数据传递状态事件;
V-SMF根据第一N4信息确定第二N4信息。具体如下:
当V-SMF接收到AMF的UE不可达通知时,V-SMF可以根据第一PDR确定第二PDR。第二PDR是根据上述第一PDR生成的,包括与上述第一PDR相同的过滤器模板和优先级信息。V-SMF可以根据DDN Failure通知控制指示信息和第二PDR确定关联的FAR。FAR用于指示UPF丢弃与第二PDR匹配的数据包并进行报告。
当V-SMF接收到AMF的UE处于空闲状态的通知时,V-SMF可以根据第一PDR确定第二PDR,第二PDR是根据上述第一PDR生成的,包括与上述第一PDR相同的过滤器模板和优先级信息。V-SMF可以根据DDN Failure通知控制指示信息和第二PDR确定关联的FAR和URR。FAR用于指示UPF丢弃缓存的与第二PDR匹配的数据,URR用于指示UPF当丢弃缓存的与第二PDR匹配的数据包时进行报告。
当订阅的传递状态为缓存时,FAR用于指示UPF缓存与PDR匹配的数据包,URR用于指示UPF在缓存数据包时通知SMF,具体此处不作限定。
具体的,生成第二PDR的过程,可以是直接将第一PDR作为第二PDR,生成第二PDR也可以通过其他方式,例如对第一PDR进行格式变换,生成第二PDR,具体此处不作限定。
V-SMF向UPF发送第二N4信息(N4 information),第二N4信息包括上述第二PDR、FAR和URR。在本申请实施例中,事件订阅的过程中生成的第二N4信息也可以称为第二策略规则。
B:消息中不携带通知控制指示信息,根据事件的订阅生成对应的策略规则,具体的实现方式为:
610、V-SMF确定需要请求用于处理数据的策略规则,并向第二SMF发送第二消息:
在步骤601中,V-SMF接收到策略计费控制应用于所述UE的指示信息、报告接收到下行数据传递状态事件订阅的指示信息或报告接收到数据描述信息的指示信息,V-SMF可以 确定PCC应用于该PDU会话,并且当V-SMF确定数据需要缓存在UPF时,也就能确定需要向第二SMF报告接收到的事件订阅以及请求用于在UPF对数据进行处理的策略。
V-SMF可以为该事件分配事务标识(Transaction Id),事务标识用来表示V-SMF和第二SMF之间的事务,用于后续的修改和删除操作。在本申请实施例中,事务标识也可称为第一标识信息。在本申请实施例中,事务标识对应于第一事件的订阅,事务标识也可用于标识针对第一事件订阅的策略规则请求。本实施例中,事务标识对应于下行数据传递状态事件的订阅。
具体地,V-SMF向第二SMF发送Nsmf_PDUSession_Update Request消息,报告接收到的事件订阅,请求用于对数据进行检测的策略。消息中携带三元组信息和上述事务标识(Transaction Id)。在本实施例中,该消息也可以称为第二消息。
611、第二SMF向PCF发送第七消息:
步骤210中第二SMF接收的第二消息中同时包括三元组信息和事务标识。
接收到事务标识,第二SMF需要向PCF请求下行数据传递失败后可达的PCC规则,由于之前PCF提供了携带数据描述的下行数据传递状态事件订阅的PCRT,第二SMF可以向PCF发送Npcf_SMPolicyControl_Update请求消息。在本实施例中,该消息也可以称为第七消息。本申请实施例中,第七消息用于向PCF请求PCC规则。
消息中携带步骤610中接收到的三元组信息和PCRT。
可选地,消息中还可以携带操作指示Create,表示该消息用于请求新的PCC规则。
612、PCF制定PCC规则,并向第二SMF发送第三策略规则:
PCF根据步骤611中接收到的三元组信息制定PCC规则(PCC rule),即在PCC规则中的过滤器模板中包括该三元组信息,并且设置高优先级,PCC规则中包括PCC规则标识(PCC rule Id),PCC规则标识用来表示该PCC规则,在后续对PCC规则进行更新或删除时,可以根据该PCC规则标识确定对应的PCC规则,从而做出对PCC规则的变动。在本申请实施例中,PCC规则标识也可称为第二标识信息。
PCF向第二SMF返回确认消息,消息中携带上述PCC规则。在本申请实施例中,事件订阅的过程中生成的PCC规则也可以称为第三策略规则。
613、第二SMF接收第三策略规则,生成第一N4信息(N4 information),并向V-SMF发送第一策略规则:
当第二SMF接收到步骤612的PCC规则(第三策略规则),由于步骤610中的第二消息中同时包括三元组信息和事务标识,而该PCC规则又是根据该三元组信息生成的,因此第二SMF可以据此确定并保存事务标识和PCC规则标识的对应关系。在后续对下行数据传递状态订阅进行更新或删除时,可以根据该对应关系查找到该事件所对应的PCC规则标识,从而向PCF发出相应的指令,使PCF更新或删除该PCC规则标识所对应的PCC规则。
第二SMF根据PCC规则确定携带第一PDR的第一N4信息。第一PDR是根据上述PCC规则确定的,与上述PCC规则携带相同的优先级信息和过滤器模板。
第二SMF向V-SMF返回确认消息,消息中携带上述第一N4信息和事务标识。在本申请实施例中,事件订阅的过程中生成的第一N4信息也可以称为第一策略规则。
614、V-SMF向UPF发送第二N4信息(第二策略规则):
由于步骤610中V-SMF为下行数据传递状态事件分配了事务标识,V-SMF可以根据步骤613消息中的事务标识将该消息中的第一N4信息和下行数据传递状态事件订阅关联,确定第一N4信息用于检测下行数据传递状态事件。
V-SMF根据第一N4信息和下行数据传递状态事件订阅确定第二N4信息。具体如下:
当V-SMF接收到AMF的UE不可达通知时,V-SMF可以根据第一PDR确定第二PDR。第二PDR是根据上述第一PDR生成的,包括与上述第一PDR相同的过滤器模板和优先级信息。V-SMF可以根据下行数据传递状态事件的订阅和第二PDR确定关联的FAR。FAR用于指示UPF丢弃与第二PDR匹配的数据包并进行报告。
当V-SMF接收到AMF的UE处于空闲状态的通知时,V-SMF可以根据第一PDR确定第二PDR,第二PDR是根据上述第一PDR生成的,包括与上述第一PDR相同的过滤器模板和优先级信息。V-SMF可以根据下行数据传递状态事件的订阅和第二PDR确定关联的FAR和URR。FAR用于指示UPF丢弃缓存的与第二PDR匹配的数据,URR用于指示UPF当丢弃缓存的与第二PDR匹配的数据包时进行报告。
当订阅的传递状态为缓存时,FAR用于指示UPF缓存与PDR匹配的数据包,URR用于指示UPF在缓存数据包时通知SMF,具体此处不作限定。
具体的,生成第二PDR的过程,可以是直接将第一PDR作为第二PDR,生成第二PDR也可以通过其他方式,例如对第一PDR进行格式变换,生成第二PDR,具体此处不作限定。
V-SMF向UPF发送第二N4信息(N4 information),第二N4信息包括上述第二PDR、FAR和URR。在本申请实施例中,事件订阅的过程中生成的第二N4信息也可以称为第二策略规则。
615、UPF通知V-SMF匹配的数据包被丢弃:
UPF根据上述FAR丢弃与PDR匹配的数据包后,根据上述URR通知V-SMF匹配的数据包被丢弃。
当上述传输状态为缓存时,UPF根据上述FAR缓存与PDR匹配的数据包后,根据上述URR通知V-SMF匹配的数据包被缓存。
616、V-SMF向NEF发送通知请求消息:
当V-SMF接收到UPF发送的数据包被丢弃的通知时,V-SMF可以向NEF发送数据包被丢弃的通知。
当上述传输状态为缓存时,V-SMF接收到UPF发送的数据包被缓存的通知时,V-SMF可以向NEF发送数据包被缓存的通知。
当上述传输状态为传递时,当V-SMF检测到PDU会话变成ACTIVE,即确认UE可达时,且步骤615中接收到数据包被缓存的通知,UPF会自动转发之前被缓存的数据,此时V-SMF就可以确定之前缓存的数据包被传递,向NEF发送数据包被传递的通知。
可选的,V-SMF可以先向第二SMF发送上述通知,第二SMF再向NEF报告,具体此处不作限定。
在本申请实施例中,步骤615中丢弃数据或缓存数据的事件也可称为第二事件,第一 SMF可以根据第二事件确定第一事件。例如在本实施例中就可以根据丢弃数据或缓存数据的事件确定下行数据传递状态事件。
在本申请实施例中,NEF也可称为事件接收网元,事件接收网元用于接收与第一事件相关的报告,在本实施例中即为下行数据传递状态事件的报告。
617、NEF向AF发送通知请求消息:
NEF向AF发送Nneff_EventExposure_Notify Request消息,消息中携带事件标识和AF通知端点。
在本申请实施例中,PCC规则不仅可以由第一SMF来请求,也可以由第二SMF来发起请求PCC规则,下面将对由第二SMF来向PCF请求PCC规则的流程进行说明:
1.2、第二SMF向PCF请求PCC规则:
请参阅图7,当UE处于漫游状态时,AF订阅下行数据传递状态事件,由第二SMF来向PCF请求PCC规则。对于PDU会话存在I-SMF的场景,将V-SMF替换为I-SMF即可。本申请实施例中提供策略规则的一个流程包括:
701-705:
步骤701至705与图6所示实施例的步骤601至步骤605类似,此处不再赘述。
706、V-SMF向第二SMF返回确认消息:
V-SMF根据步骤705中接收到的事件标识分配SMF订阅关联标识(SMF subscription correlation id),SMF订阅关联标识用来标识下行数据传递状态事件,表示该事件已在V-SMF处订阅成功。
V-SMF确定由UPF来缓存数据,则V-SMF可以生成UPF缓存数据的指示或请求PCC的指示。
V-SMF保存接收到的信息,并向第二SMF返回确认消息,消息中携带上述SMF订阅相关标识以及上述UPF缓存数据的指示或请求PCC的指示。
707-709:
步骤707至709与图6所示实施例的步骤607至步骤609类似,此处不再赘述。
在本申请实施例中,步骤707也可以在步骤705或706之前执行,只要在步骤704之后执行即可;步骤708也可以在步骤704至707之间的任一步之前执行,只要在步骤703之后执行即可;步骤709也可以在步骤703至708之间的任一步之前执行,只要在步骤702之后执行即可,具体此处不作限定。
步骤710至713有两种实现方式,具体如下:
A:消息中携带通知控制指示信息,用于生成对应的策略规则,具体的实现方式为:
710、第二SMF确定需要请求用于处理数据的策略规则,并向PCF发送更新请求消息:
由于在步骤706中接收到UPF缓存数据的指示或请求PCC的指示,第二SMF可以确定需要向PCF请求PCC规则。并且之前PCF提供了携带数据描述的下行数据传递状态事件订阅的PCRT,第二SMF可以向PCF发送Npcf_SMPolicyControl_Update请求,请求用于处理数据的策略规则。
消息中携带步骤704中接收到的三元组信息和携带数据描述的下行数据传递状态事件 订阅的PCRT。
在本申请实施例中,该PCRT也可称为事件订阅类型指示信息,事件订阅类型指示信息用于指示事件订阅的类型。
可选地,消息中还可以携带操作指示Create,表示该消息用于请求新的PCC规则。
在本申请实施例中,步骤710也可以在步骤707至709之间的任一步之前执行,只要在步骤706之后执行即可,具体此处不作限定。
711、PCF制定PCC规则,并向第二SMF发送第三策略规则:
步骤711的A实现方式与图6所实施示例的步骤612的A实现方式类似,此处不再赘述。
712、第二SMF接收第三策略规则,生成第一N4信息(N4 information),并向V-SMF发送第一策略规则:
第二SMF在步骤711中接收到PCC规则(第三策略规则),由于该PCC规则是根据步骤710消息中的三元组信息生成的,而该三元组信息与下行数据传递状态事件的订阅相关联,第二SMF又为该事件的订阅分配了SMF订阅关联标识,因此第二SMF可以据此确定并保存SMF订阅关联标识和PCC规则标识的对应关系。在后续对下行数据通知失败订阅进行更新或删除时,可以根据该对应关系查找到该事件所对应的PCC规则标识,从而向PCF发出相应的指令,使PCF更新或删除该PCC规则标识所对应的PCC规则。
第二SMF根据PCC规则确定携带第一PDR的第一N4信息。步骤711的PCC规则或确认消息中包括PCRT,因此第一N4信息中也可以包括PCRT,第一PDR是根据上述PCC规则确定的,与上述PCC规则携带相同的优先级信息和过滤器模板。
第二SMF向V-SMF返回确认消息,消息中携带上述第一N4信息。在本申请实施例中,事件订阅的过程中生成的第一N4信息也可以称为第一策略规则。
可选的,PCRT也可以不包括在第一N4信息中,而是携带于上述确认消息中,具体此处不做限定。
713、V-SMF向UPF发送第二N4信息(第二策略规则):
步骤713的A实现方式与图6所实施示例的步骤614的A实现方式类似,此处不再赘述。
B:消息中不携带通知控制指示信息,根据事件的订阅生成对应的策略规则,具体的实现方式为:
710、第二SMF确定需要请求用于处理数据的策略规则,并向PCF发送更新请求消息:
由于在步骤706中接收到UPF缓存数据的指示或请求PCC的指示,第二SMF可以确定需要向PCF请求PCC规则。并且之前PCF提供了携带数据描述的下行数据传递状态事件订阅的PCRT,第二SMF可以向PCF发送Npcf_SMPolicyControl_Update请求,请求用于处理数据的策略规则。
消息中携带步骤704中接收到的三元组信息和携带数据描述的下行数据传递状态事件订阅的PCRT。
711、PCF制定PCC规则,并向第二SMF发送第三策略规则:
步骤711的B实现方式与图6所实施示例的步骤612的B实现方式类似,此处不再赘述。
712、第二SMF接收第三策略规则,生成第一N4信息(N4 information),并向V-SMF发送第一策略规则:
第二SMF在步骤711中接收到PCC规则(第三策略规则),由于该PCC规则是根据步骤710消息中的三元组信息生成的,而该三元组信息与下行数据传输状态事件的订阅相关联,第二SMF又为该事件的订阅分配了SMF订阅关联标识,因此第二SMF可以据此确定并保存SMF订阅关联标识和PCC规则标识的对应关系。在后续对下行数据通知失败订阅进行更新或删除时,可以根据该对应关系查找到该事件所对应的PCC规则标识,从而向PCF发出相应的指令,使PCF更新或删除该PCC规则标识所对应的PCC规则。
第二SMF根据PCC规则确定携带第一PDR的第一N4信息。第一PDR是根据上述PCC规则确定的,与上述PCC规则携带相同的优先级信息和过滤器模板。
第二SMF向V-SMF返回确认消息,消息中携带上述第一N4信息。在本申请实施例中,事件订阅的过程中生成的第一N4信息也可以称为第一策略规则。
713、V-SMF向UPF发送第二N4信息(第二策略规则):
步骤713的B实现方式与图6所实施示例的步骤614的B实现方式类似,此处不再赘述。
714-716:
步骤714至步骤716与图6所示实施例中的步骤615至步骤617类似,此处不再赘述。
除了对事件的订阅,本申请实施例还提供了订阅成功后对事件的更新和删除,接下来就对更新和删除的过程进行描述:
2、更新下行数据传输状态事件:
请参阅图8a,基于图6对下行数据传输状态事件的订阅,本实施例中提供了更新上述事件时,获取对应的策略规则的流程,对于PDU会话存在I-SMF的场景,将V-SMF替换为I-SMF即可,具体此处不做限定,该流程包括:
801a、UE接入网络,建立PDU会话:
此时AF已经根据图6所示实施例完成了对下行数据传输状态事件的订阅。
802a、AF向NEF发送订阅请求消息:
AF向NEF发送Nnef_EventExposure_Subscribe Request消息,请求更新下行数据传递状态(downlink data delivery status)事件订阅。
消息中携带NEF订阅关联标识,以及更新的三元组信息,在本实施例中,将用该三元组信息代替原来订阅时的三元组信息,生成对应于该三元组信息的策略规则。本实施例或图8b所实施示例中,三元组信息也称为第二数据描述信息或第二描述信息。NEF订阅关联标识是NEF在事件订阅的过程中生成的。
803a、NEF向UDM发送订阅请求消息:
NEF向UDM发送Nudm_EventExposure_Subscribe Request消息,请求更新下行数据传递状态事件订阅。
消息中携带UDM订阅关联标识和步骤802a中接收到的三元组信息。UDM订阅关联标识是UDM在事件订阅的过程中生成的。
804a、UDM向第二SMF发送订阅请求消息:
UDM向第二SMF发送Namf_EventExposure_Subscribe Request消息,请求更新下行数据传输状态事件。
消息中携带SMF订阅关联标识和步骤803中接收到的三元组信息。SMF订阅关联标识与图6所示实施例中步骤607中第二SMF分配的相同。
805a、第二SMF向UE注册的V-SMF发送第三消息:
第二SMF向UE注册的V-SMF发送Namf_EventExposure_Subscribe Request消息,请求更新下行数据传输状态事件。在本实施例中,该消息也可以称为第三消息。本申请实施例中,第三消息用于向V-SMF请求更新事件的订阅。
消息中携带SMF订阅关联标识和步骤804中接收到的三元组信息。SMF订阅关联标识是事件订阅时V-SMF分配的。
806a、V-SMF向第二SMF返回确认消息:
V-SMF根据步骤805a中接收到的SMF订阅关联标识确定订阅事件为下行数据传输状态事件,根据三元组信息更新该事件的订阅信息,并向第二SMF返回确认消息。
807a、第二SMF向UDM返回确认消息:
接收到V-SMF发送的确认消息后,第二SMF根据步骤804a中接收到的SMF订阅关联标识确定订阅事件为下行数据传输状态事件,根据三元组信息更新该事件的订阅信息,并向UDM返回确认消息。
808a、UDM向NEF返回确认消息:
接收到第二SMF发送的确认消息后,UDM根据步骤803中接收到的UDM订阅关联标识确定订阅事件为下行数据传输状态事件,根据三元组信息更新该事件的订阅信息,并向NEF返回确认消息。
809a、NEF向AF返回确认消息:
接收到UDM发送的确认消息后,NEF根据步骤802a中接收到的NEF订阅关联标识确定订阅事件为下行数据传输状态事件,根据三元组信息更新该事件的订阅信息,并向AF返回确认消息。
步骤810a至814a有两种实现方式,具体如下:
A:消息中携带通知控制指示信息,用于生成对应的策略规则,具体的实现方式为:
810a、V-SMF向第二SMF发送第四消息:
步骤805a中V-SMF接收到第三消息,可以根据第三消息中的SMF订阅关联标识确定下行数据通知状态事件,根据该消息确定需要更新该事件的订阅。在本申请实施例中,SMF订阅关联标识也可称为第三标识,用于标识第一事件的订阅。
V-SMF向第二SMF发送Nsmf_PDUSession_Update Request消息,该消息用于请求更新第一N4信息。在本实施例中,该消息也可以称为第四消息。本申请实施例中,第四消息用于向第二SMF请求更新订阅事件所对应的用于处理数据的策略规则。
消息中携带三元组信息、事务标识以及下行数据传输状态指示信息。下行数据传输状态指示信息是也称为事件订阅类型指示信息,在事件订阅的过程中生成的,用于指示第一事件。
811a、第二SMF向PCF发送第八消息:
在事件订阅的过程中,第二SMF将事务标识和PCC规则标识之间的对应关系保存了下来,此时第二SMF就可以根据事务标识确定对应的PCC规则标识。
第二SMF向PCF发送Npcf_SMPolicyControl_Update请求消息,该消息用于请求更新上述PCC规则标识对应的PCC规则。在本实施例中,该消息也可以称为第八消息。本申请实施例中,第八消息用于向PCF请求更新PCC规则。
消息中携带三元组信息、PCC规则标识,以及在事件订阅的过程中接收到的下行数据传输状态指示信息。
可选地,消息中还可以携带操作指示Modify,表示该消息用于请求更新的PCC规则。
812a、PCF跟据三元组信息更新PCC规则,并向第二SMF发送第五策略规则:
PCF根据三元组信息更新PCC规则,即在PCC规则中的过滤器模板中包括该三元组信息。可选地,PCC规则中可以包括下行数据传输状态通知控制指示信息。该下行数据传输状态通知控制指示信息是事件订阅的过程中生成的,PCF可以通过该指示信息与PCC规则标识的对应关系确定该指示信息;下行数据传输状态通知控制指示信息也可以是PCF根据上述下行数据传输状态指示信息生成的,具体此处不作限定。
PCF向第二SMF返回确认消息,消息中携带更新后的PCC规则。在本申请实施例中,事件订阅的过程中生成的PCC规则也可以称为第三策略规则。
可选地,下行数据传输状态通知控制指示信息还可以携带于该确认消息中,具体此处不作限定。
813a、第二SMF更新第一N4信息(N4 information),并向V-SMF发送第四策略规则:
第二SMF根据PCC规则更新携带第一PDR的第一N4信息。第一N4信息中还包括下行数据传输状态通知控制指示信息,第一PDR是根据上述PCC规则确定的,与上述PCC规则携带相同的优先级信息和过滤器模板。
第二SMF向V-SMF返回确认消息,消息中携带上述第一N4信息。可选地,下行数据传输状态通知控制指示信息还可以携带于该确认消息中,具体此处不作限定。
814a、V-SMF向UPF发送第二N4信息:
由于步骤813a中的第一N4信息或确认消息中包括下行数据传输状态通知控制指示信息,因此V-SMF确定该第一N4信息用于检测下行数据传输状态事件。V-SMF根据第一N4信息确定第二N4信息。
V-SMF根据第一N4信息确定第二N4信息。具体如下:
当V-SMF接收到AMF的UE不可达通知时,V-SMF可以根据第一PDR确定第二PDR。第二PDR是根据上述第一PDR生成的,包括与上述第一PDR相同的过滤器模板和优先级信息。V-SMF可以根据下行数据传输状态通知控制指示信息和第二PDR确定关联的FAR。FAR用于指示UPF丢弃与第二PDR匹配的数据包并进行报告。
当V-SMF接收到AMF的UE处于空闲状态的通知时,V-SMF可以根据第一PDR确定第二PDR,第二PDR是根据上述第一PDR生成的,包括与上述第一PDR相同的过滤器模板和优先级信息。V-SMF可以根据下行数据传输状态通知控制指示信息和第二PDR确定关联的FAR和URR。FAR用于指示UPF丢弃缓存的与第二PDR匹配的数据,URR用于指示UPF当丢弃缓存的与第二PDR匹配的数据包时进行报告。
当订阅的传递状态为缓存时,FAR用于指示UPF缓存与PDR匹配的数据包,URR用于指示UPF在缓存数据包时通知SMF,具体此处不作限定。
具体的,生成第二PDR的过程,可以是直接将第一PDR作为第二PDR,生成第二PDR也可以通过其他方式,例如对第一PDR进行格式变换,生成第二PDR,具体此处不作限定。
V-SMF向UPF发送第二N4信息(N4 information),第二N4信息包括上述第二PDR、FAR和URR。在本申请实施例中,事件订阅的过程中生成的第二N4信息也可以称为第二策略规则。
B:消息中不携带事件订阅的指示标识,根据事件的订阅生成对应的策略规则,具体的实现方式为:
810a、V-SMF确定需要请求更新用于处理数据的策略规则,并向第二SMF发送第四消息:
步骤805a中V-SMF接收到第三消息,可以根据第三消息中的SMF订阅关联标识确定下行数据传递状态事件,根据该消息确定需要更新该事件的订阅。在本申请实施例中,SMF订阅关联标识也可称为第三标识,用于标识第一事件的订阅。
V-SMF向第二SMF发送Nsmf_PDUSession_Update Request消息,该消息用于请求更新第一N4信息。在本实施例中,该消息也可以称为第四消息。消息中携带三元组信息和事务标识。该事务标识是事件订阅时生成的,用于表示第一SMF和第二SMF之间的事件,具体在本实施例中对应于下行数据传递状态事件的订阅。
811a、第二SMF向PCF发送第八消息:
在事件订阅的过程中,第二SMF将事务标识和PCC规则标识之间的对应关系保存了下来,此时第二SMF就可以根据事务标识确定对应的PCC规则标识。
第二SMF向PCF发送Npcf_SMPolicyControl_Update请求消息,该消息用于请求更新上述PCC规则标识对应的PCC规则。在本实施例中,该消息也可以称为第八消息。
消息中携带三元组信息和PCC规则标识。
可选地,消息中还可以携带操作指示Modify,表示该消息用于请求更新的PCC规则。
812a、PCF跟据三元组信息更新PCC规则,并向第二SMF发送第五策略规则:
PCF根据三元组信息更新PCC规则,即在PCC规则中的过滤器模板中包括该三元组信息。
PCF向第二SMF返回确认消息,消息中携带更新后的PCC规则。在本申请实施例中,事件更新的过程中生成的PCC规则也可以称为第五策略规则。
813a、第二SMF更新第一N4信息(N4 information),并向V-SMF发送第四策略规则:
第二SMF根据PCC规则更新携带第一PDR的第一N4信息。第一PDR是根据上述PCC 规则确定的,与上述PCC规则携带相同的优先级信息和过滤器模板。
在步骤812a中,第二SMF接收到的PCC规则中包括PCC规则标识,由于订阅时第二SMF保存了PCC规则标识与事务标识之间的对应关系,此时第二SMF就可以根据该PCC规则标识确定PCC规则对应的事务标识。
第二SMF向V-SMF返回确认消息,消息中携带上述第一N4信息和事务标识。在本申请实施例中,事件更新的过程中生成的第一N4信息也可以称为第四策略规则。
814a、V-SMF向UPF发送第二N4信息:
V-SMF可以根据步骤813a中接收到的事务标识将第一N4信息和下行数据通知状态事件的订阅关联,确定第一N4信息用于检测下行数据通知状态事件。V-SMF根据第一N4信息和下行数据通知状态事件的订阅确定第二N4信息。
V-SMF根据第一N4信息和下行数据通知失败事件订阅确定第二N4信息。具体如下:
当V-SMF接收到AMF的UE不可达通知时,V-SMF可以根据第一PDR确定第二PDR。第二PDR是根据上述第一PDR生成的,包括与上述第一PDR相同的过滤器模板和优先级信息。V-SMF可以根据下行数据通知失败事件订阅和第二PDR确定关联的FAR。
当V-SMF接收到AMF的UE处于空闲状态的通知时,V-SMF可以根据第一PDR确定第二PDR,第二PDR是根据上述第一PDR生成的,包括与上述第一PDR相同的过滤器模板和优先级信息。V-SMF可以根据下行数据通知失败事件订阅和第二PDR确定关联的FAR和URR。FAR用于指示UPF丢弃缓存的与第二PDR匹配的数据,URR用于指示UPF当丢弃缓存的与第二PDR匹配的数据包时进行报告。
当订阅的传递状态为缓存时,FAR用于指示UPF缓存与PDR匹配的数据包,URR用于指示UPF在缓存数据包时通知SMF,具体此处不作限定。
具体的,生成第二PDR的过程,可以是直接将第一PDR作为第二PDR,生成第二PDR也可以通过其他方式,例如对第一PDR进行格式变换,生成第二PDR,具体此处不作限定。
V-SMF向UPF发送第二N4信息(N4 information),第二N4信息包括上述第二PDR、FAR和URR。在本申请实施例中,事件订阅的过程中生成的第二N4信息也可以称为第二策略规则。
815a-817a:
步骤815a至817a与图6所示实施例的步骤615至617类似,此处不再赘述。
请参阅图8b,基于图7对下行数据传输状态事件的订阅,本实施例中提供了更新上述事件时,获取对应的策略规则的流程,对于PDU会话存在I-SMF的场景,将V-SMF替换为I-SMF即可,具体此处不做限定,该流程包括:
801b、UE接入网络,建立PDU会话:
此时AF已经根据图7所示实施例完成了对下行数据传输状态事件的订阅。
802b-809b:
步骤802b至步骤809b与图8a所实施示例的步骤802a至步骤809a类似,此处不再赘述。
在本申请实施例中,步骤807b也可以在步骤805b或步骤806b之前执行,只要在步骤 804b之后执行;步骤808b也可以在步骤804b至807b中的任一步之前执行,只要在步骤803b之后执行即可;步骤809b也可以在步骤803b至808b中的任一步之前执行,只要在步骤802b之后执行即可,此处不作限定。
步骤810b至813b有两种实现方式,具体如下:
A:消息中携带通知控制指示信息,用于生成对应的策略规则,具体的实现方式为:
810b、第二SMF确定需要请求更新用于处理数据的策略规则,并向PCF发送更新请求消息:
步骤804b或806b中第二SMF接收到的消息中携带SMF订阅关联标识,第二SMF可以根据该标识确定下行数据传递状态事件,根据该消息确定需要更新该事件的订阅。在本申请实施例中,SMF订阅关联标识也可称为第三标识,用于标识第一事件的订阅。
在事件订阅的过程中,第二SMF将SMF订阅关联标识和PCC规则标识之间的对应关系保存了下来,此时第二SMF就可以根据SMF订阅关联标识确定对应的PCC规则标识。
第二SMF向PCF发送Npcf_SMPolicyControl_Update请求消息,该消息用于请求更新上述PCC规则标识对应的PCC规则。
消息中携带三元组信息、PCC规则标识,以及在事件订阅的过程中接收到的下行数据传输状态指示信息。
可选地,消息中还可以携带操作指示Modify,表示该消息用于请求更新的PCC规则。
在本申请实施例中,步骤810b也可以在步骤805b至809b中的任一步之前执行,只要在步骤804b或806b之后执行即可,此处不作限定。
若步骤810b在步骤806b之后执行,步骤806b第二SMF可以确定V-SMF完成了该事件的更新,此时向PCF请求更新更为稳妥。
811b、PCF跟据三元组信息更新PCC规则,并向第二SMF发送第五策略规则:
步骤811b的A实现方式与图8a所实施示例的步骤812a的A实现方式类似,此处不再赘述。
812b、第二SMF更新第一N4信息(N4 information),并向V-SMF发送第四策略规则:
第二SMF根据PCC规则更新携带第一PDR的第一N4信息。第一PDR是根据上述PCC规则确定的,与上述PCC规则携带相同的优先级信息和过滤器模板。
在步骤812a中,第二SMF接收到的PCC规则中包括PCC规则标识,由于订阅时第二SMF保存了PCC规则标识与SMF订阅关联标识之间的对应关系,此时第二SMF就可以根据该PCC规则标识确定PCC规则对应的SMF订阅关联标识。
第二SMF向V-SMF返回确认消息,消息中携带上述第一N4信息和SMF订阅关联标识。在本申请实施例中,事件更新的过程中生成的第一N4信息也可以称为第四策略规则。
在本申请实施例中,步骤810b也可以在步骤805b至809b中的任一步之前执行,只要在步骤804b或806b之后执行即可,此处不作限定。
若步骤810b在步骤806b之后执行,步骤806b第二SMF可以确定V-SMF完成了该事件的更新,此时向PCF请求更新更为稳妥。
811b-813b:
步骤811b至步骤813b的A实现方式与图8a所实施示例的步骤812a至814a的A实现方式类似,此处不再赘述。
B:消息中不携带通知控制指示信息,根据事件的订阅生成对应的策略规则,具体的实现方式为:
810b、第二SMF确定需要请求更新用于处理数据的策略规则,并向PCF发送更新请求消息:
步骤804b或806b中第二SMF接收到的消息中携带SMF订阅关联标识,第二SMF可以根据该标识确定下行数据传递状态事件,根据该消息确定需要更新该事件的订阅。在本申请实施例中,SMF订阅关联标识也可称为第三标识,用于标识第一事件的订阅。
在事件订阅的过程中,第二SMF将SMF订阅关联标识和PCC规则标识之间的对应关系保存了下来,此时第二SMF就可以根据SMF订阅关联标识确定对应的PCC规则标识。
第二SMF向PCF发送Npcf_SMPolicyControl_Update请求消息,该消息用于请求更新上述PCC规则标识对应的PCC规则。
消息中携带三元组信息和PCC规则标识。
可选地,消息中还可以携带操作指示Modify,表示该消息用于请求更新的PCC规则。
811b-813b:
步骤811b至步骤813b的B实现方式与图8a所实施示例的步骤812a至814a的B实现方式类似,此处不再赘述。
814b-816b:
步骤814b至816b与图7所示实施例的步骤714至716类似,此处不再赘述。
3、删除下行数据传输状态事件:
请参阅图9a,基于图6对下行数据传输状态事件的订阅,本实施例中提供了删除上述事件时,删除该事件订阅的流程,对于PDU会话存在I-SMF的场景,将V-SMF替换为I-SMF即可,具体此处不做限定,该流程包括:
901a、UE接入网络,建立PDU会话:
与图8a所实施示例中的步骤801a一致,此处不再赘述。
902a、AF向NEF发送去订阅请求消息:
AF向NEF发送Nnef_EventExposure_Unsubscribe Request消息,请求删除事件订阅。
消息中携带在事件订阅过程中接收到的NEF订阅关联标识。
903a、NEF向UDM发送去订阅请求消息:
NEF向UDM发送Nudm_EventExposure_Unsubscribe Request消息,请求删除事件订阅。
消息中携带在事件订阅过程中接收到的UDM订阅关联标识。
904a、UDM向UE注册的第二SMF发送去订阅请求消息:
UDM向UE注册的第二SMF发送Nsmf_EventExposure_Unsubscribe Request消息,请求删除事件订阅。
消息中携带在事件订阅过程中接收到的AMF订阅关联标识。
905a、第二SMF向V-SMF发送去订阅请求消息:
第二SMF向UE注册的V-SMF发送Nsmf_EventExposure_Unsubscribe Request消息,请求删除事件订阅。
消息中携带在事件订阅过程中接收到的AMF订阅关联标识。
906a、V-SMF向第二SMF返回确认消息。
907a、第二SMF向UDM返回确认消息。
908a、UDM向NEF返回确认消息:
909a、NEF向AF返回确认消息。
910a、V-SMF确定需要请求删除第一N4信息,并向第二SMF发送第六消息:
V-SMF可以根据步骤905a中去订阅请求中的SMF订阅关联标识确定下行数据传递状态事件,并根据该请求确定需要删除该事件的订阅,从而确定需要请求删除第一N4信息。在本申请实施例中,SMF订阅关联标识也可称为第三标识,用于标识第一事件的订阅。
在订阅的过程中,V-SMF保存了事件订阅和事务标识之间的对应关系,此时就可以查询到该事件订阅对应的事务标识。
具体的,V-SMF向SMF发送Nsmf_PDUSession_Update Request消息,消息中携带请求删除第一N4信息的指示。在本实施例中,该消息也称为第六消息,第六消息用于请求删除第一N4信息。
消息中携带事务标识和操作指示delete。
911a-914:
步骤911a至步骤914与图5a所示实施例中的步骤511a至步骤514a类似,此处不再赘述。
请参阅图9b,基于图7对下行数据传输状态事件的订阅,本实施例中提供了删除上述事件时,删除该事件订阅的流程,对于PDU会话存在I-SMF的场景,将V-SMF替换为I-SMF即可,具体此处不做限定,该流程包括:
901b、UE接入网络,建立PDU会话:
此时AF已经根据图7所示实施例完成了对下行数据传输状态事件的订阅。
902b-909b:
步骤902b至步骤909b与图9a所实施示例的步骤902a至步骤909a类似,此处不再赘述。
910b、第二SMF向PCF发送更新请求消息:
第二SMF向PCF发送Nsmf_PDUSession_Update Request消息,请求删除下行数据通知失败事件。
消息中携带SMF订阅关联标识和去订阅指示,SMF订阅关联标识是事件订阅时第二SMF生成的。
911b-913b:
步骤911b至步骤913b与图5a所实施示例的步骤513b至515b类似,此处不再赘述。
下面对本申请实施例中会话管理网元进行描述,请参阅图10,本申请实施例中,会话管理网元一种结构包括:
第一接收单元1001,用于接收第一消息,所述第一消息用于请求创建第一事件的订阅,所述第一事件的订阅为针对用户设备UE的事件订阅,所述第一消息包括数据的第一描述信息,所述数据为所述UE接收的数据;
第一发送单元1002,用于根据请求策略指示信息向第二会话管理网元SMF发送第二消息,所述第二消息包括所述第一描述信息,所述第二消息用于请求所述第一描述信息对应的第一策略规则;
第二接收单元1003,用于接收所述第二SMF发送的所述第一策略规则;
第一确定单元1004,用于根据所述第一策略规则确定第二策略规则;
第二发送单元1005,用于向用户面功能网元UPF发送所述第二策略规则,以使得所述UPF对所述数据进行处理。
请参阅图11,本申请实施例中,会话管理网元另一结构包括:
第一接收单元1101,用于接收第一消息,所述第一消息用于请求创建第一事件的订阅,所述第一事件的订阅为针对用户设备UE的事件订阅,所述第一消息包括数据的第一描述信息,所述数据为所述UE接收的数据;
第一发送单元1102,用于根据请求策略指示信息向第二会话管理网元SMF发送第二消息,所述第二消息包括所述第一描述信息,所述第二消息用于请求所述第一描述信息对应的第一策略规则;
第二接收单元1103,用于接收所述第二SMF发送的所述第一策略规则;
第一确定单元1104,用于根据所述第一策略规则确定第二策略规则;
第二发送单元1105,用于向用户面功能网元UPF发送所述第二策略规则,以使得所述UPF对所述数据进行处理。
第三接收单元1106,用于接收第三消息,所述第三消息用于请求更新所述第一事件的订阅,所述第三消息包括所述数据的第二描述信息;
第三发送单元1107,用于向所述第二SMF发送第四消息,所述第四消息用于请求更新所述第一策略规则,所述第四消息中包括所述第一标识和所述第二描述信息;
第四接收单元1108,用于接收所述第二SMF发送的第四策略规则,所述第四策略规则为更新所述第一策略规则后得到的策略规则;
第一更新单元1109,用于根据所述第四策略规则更新所述第二策略规则。
第五接收单元1110,用于接收第五消息,所述第五消息用于请求删除所述第一事件的订阅;
第四发送单元1111,用于向所述第二SMF发送第六消息,所述第六消息用于请求删除所述第一策略规则,所述第六消息包括所述第一标识和删除指示。
第六接收单元1112,用于接收所述第二SMF发送的所述请求策略指示信息。
本实施例中,第二接收单元1103可以包括第一接收子单元11031;
第一接收子单元11031,用于接收所述第二SMF发送的所述第一策略规则和通知控制指示信息,所述通知控制指示信息根据所述事件订阅类型指示信息确定;
本实施例中,第一确定单元1104可以包括第一确定子单元11041或第二确定子单元 11042;
第一确定子单元11041,用于根据所述第一策略规则和所述通知控制指示信息确定所述第二策略规则。
第二确定子单元11042,用于根据所述第一策略规则和所述第一事件的订阅确定所述第二策略规则。
下面对本申请实施例中会话管理网元进行描述,请参阅图12,本申请实施例中,会话管理网元一种结构包括:
第七接收单元1201,用于接收第一会话管理网元SMF发送的第二消息,所述第二消息包括第一描述信息和事件订阅类型指示信息,所述事件订阅类型指示信息用于指示事件订阅的类型,所述事件订阅为针对用户设备UE的事件订阅,所述第一描述信息用于标识所述UE接收的数据;
第五发送单元1202,用于向策略控制网元PCF发送第七消息,所述第七消息用于请求所述第一描述信息对应的第三策略规则,所述第七消息包括所述第一描述信息和所述事件订阅类型指示信息;
第八接收单元1203,用于接收所述PCF发送的所述第三策略规则;
第二确定单元1204,用于根据所述第三策略规则确定第一策略规则;
第六发送单元1205,用于向所述第一SMF发送所述第一策略规则。
请参阅图13,本申请实施例中,会话管理网元另一结构包括:
第七接收单元1301,用于接收第一会话管理网元SMF发送的第二消息,所述第二消息包括第一描述信息和事件订阅类型指示信息,所述事件订阅类型指示信息用于指示事件订阅的类型,所述事件订阅为针对用户设备UE的事件订阅,所述第一描述信息用于标识所述UE接收的数据;
第五发送单元1302,用于向策略控制网元PCF发送第七消息,所述第七消息用于请求所述第一描述信息对应的第三策略规则,所述第七消息包括所述第一描述信息和下行数据通知事件订阅触发器,所述下行数据通知事件订阅触发器根据所述事件订阅类型指示信息确定;
第八接收单元1303,用于接收所述PCF发送的所述第三策略规则;
第二确定单元1304,用于根据所述第三策略规则确定第一策略规则;
第六发送单元1305,用于向所述第一SMF发送所述第一策略规则。
第九接收单元1306,用于接收所述PCF发送的第一请求策略指示信息,所述第一请求策略指示信息包括报告接收到下行数据通知事件订阅的指示信息;
第七发送单元1307,用于向所述第一SMF发送第二请求策略指示信息,所述第二请求策略指示信息包括策略计费控制应用于所述UE的指示信息、所述报告接收到下行数据通知事件订阅的指示信息或报告接收到数据描述信息的指示信息中的至少一项。
第十接收单元1308,用于接收所述第一SMF发送的第四消息,所述第四消息包括所述第一标识和所述数据的第二描述信息;
第八发送单元1309,用于向所述PCF发送第八消息,所述第八消息中包括第二标识和 所述第二描述信息,所述第八消息用于请求更新所述第三策略规则,所述第二标识为所述三策略规则的标识信息,所述第二标识根据所述第一标识确定;
第十一接收单元1310,用于接收所述PCF发送的第五策略规则,所述第五策略规则为更新所述第三策略规则后得到的策略规则;
第二更新单元1311,用于根据所述第五策略规则更新所述第一策略规则,得到第四策略规则;
第九发送单元1312,用于向所述第一SMF发送所述第四策略规则。
第十二接收单元1313,用于接收所述第一SMF发送的第六消息,所述第六消息包括所述第一标识和删除指示;
第十发送单元1314,用于向所述PCF发送第九消息,所述第九消息用于请求删除所述第三策略规则,所述第九消息包括所述第二标识,所述第二标识为所述第三策略规则的标识信息,所述第二标识根据所述第一标识确定。
本实施例中,第八接收单元1303可以包括第二接收子单元13031;
第二接收子单元13031,用于接收所述PCF发送的所述第三策略规则和通知控制指示信息,所述通知控制指示信息根据所述下行数据通知事件订阅触发器确定;
本实施例中,第六发送单元1305可以包括第一发送子单元13051;
第一发送子单元13051,用于向所述第一SMF发送所述第一策略规则和所述通知控制指示信息。
图14是本申请实施例提供的一种会话管理网元结构示意图,该会话管理网元1400可以包括一个或一个以上中央处理器(central processing units,CPU)1401和存储器1405,该存储器1405中存储有一个或一个以上的应用程序或数据。
其中,存储器1405可以是易失性存储或持久存储。存储在存储器1405的程序可以包括一个或一个以上模块,每个模块可以包括对业务控制单元中的一系列指令操作。更进一步地,中央处理器1401可以设置为与存储器1405通信,在业务控制单元1400上执行存储器1405中的一系列指令操作。
业务控制单元1400还可以包括一个或一个以上电源1402,一个或一个以上有线或无线网络接口1403,一个或一个以上输入输出接口1404,和/或,一个或一个以上操作系统,例如Windows ServerTM,Mac OS XTM,UnixTM,LinuxTM,FreeBSDTM等。
该业务控制单元1400可以执行前述图2至图9b所示实施例中会话管理网元所执行的操作,具体此处不再赘述。
所属领域的技术人员可以清楚地了解到,为描述的方便和简洁,上述描述的系统,装置和单元的具体工作过程,可以参考前述方法实施例中的对应过程,在此不再赘述。
在本申请所提供的几个实施例中,应该理解到,所揭露的系统,装置和方法,可以通过其它的方式实现。例如,以上所描述的装置实施例仅仅是示意性的,例如,所述单元的划分,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,例如多个单元或组件可以结合或者可以集成到另一个系统,或一些特征可以忽略,或不执行。另一点,所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口,装置或单元的间 接耦合或通信连接,可以是电性,机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的,作为单元显示的部件可以是或者也可以不是物理单元,即可以位于一个地方,或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外,在本申请各个实施例中的各功能单元可以集成在一个处理单元中,也可以是各个单元单独物理存在,也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现,也可以采用软件功能单元的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时,可以存储在一个计算机可读取存储介质中。基于这样的理解,本申请的技术方案全部或部分可以通过软件产品的形式体现出来,该计算机软件产品存储在一个存储介质中,包括若干指令用以使得一台计算机设备(可以是个人计算机,服务器,或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括:U盘、移动硬盘、只读存储器(ROM,read-only memory)、随机存取存储器(RAM,random access memory)、磁碟或者光盘等各种可以存储程序代码的介质。

Claims (30)

  1. 一种策略规则的提供方法,其特征在于,所述方法应用于第一会话管理网元SMF,所述方法包括:
    接收第一消息,所述第一消息用于请求创建第一事件的订阅,所述第一事件的订阅为针对用户设备UE的事件订阅,所述第一消息包括数据的第一描述信息,所述数据为所述UE接收的数据;
    根据请求策略指示信息向第二会话管理网元SMF发送第二消息,所述第二消息包括所述第一描述信息,所述第二消息用于请求所述第一描述信息对应的第一策略规则;
    接收所述第二SMF发送的所述第一策略规则;
    根据所述第一策略规则确定第二策略规则;
    向用户面功能网元UPF发送所述第二策略规则,以使得所述UPF对所述数据进行处理。
  2. 根据权利要求1所述的方法,其特征在于,所述第二消息中还包括第一标识,所述第一标识用于标识所述第一SMF与所述第二SMF之间的事务,所述向第二会话管理网元SMF发送所述第一消息之后,所述方法还包括:
    接收第三消息,所述第三消息用于请求更新所述第一事件的订阅,所述第三消息包括所述数据的第二描述信息;
    向所述第二SMF发送第四消息,所述第四消息用于请求更新所述第一策略规则,所述第四消息中包括所述第一标识和所述第二描述信息;
    接收所述第二SMF发送的第四策略规则,所述第四策略规则为根据所述第二描述信息更新所述第一策略规则后得到的策略规则;
    根据所述第四策略规则更新所述第二策略规则。
  3. 根据权利要求1所述的方法,所述第二消息中还包括第一标识,所述第一标识用于标识所述第一SMF与所述第二SMF之间的事务,所述向第二会话管理网元SMF发送所述第一消息之后,所述方法还包括:
    接收第五消息,所述第五消息用于请求删除所述第一事件的订阅;
    向所述第二SMF发送第六消息,所述第六消息用于请求删除所述第一策略规则,所述第六消息包括所述第一标识和删除指示。
  4. 根据权利要求1至3中任一项所述的方法,其特征在于,所述根据请求策略指示信息向第二会话管理网元SMF发送第二消息之前,所述方法还包括:
    接收所述第二SMF发送的所述请求策略指示信息。
  5. 根据权利要求1至3中任一项所述的方法,其特征在于:
    所述请求策略指示信息包括策略计费控制应用于所述UE的指示信息、报告接收到下行数据通知事件订阅的指示信息或报告接收到的数据描述信息的指示信息中的至少一项。
  6. 根据权利要求1至3中任一项所述的方法,其特征在于:
    所述第二消息中还包括事件订阅类型指示信息,所述事件订阅类型指示信息用于指示所述第一事件的订阅的类型。
  7. 根据权利要求1至3中任一项所述的方法,其特征在于,所述接收所述第二SMF发 送的所述第一策略规则包括:
    接收所述第二SMF发送的所述第一策略规则和通知控制指示信息,所述通知控制指示信息根据所述事件订阅类型指示信息确定;
    所述根据所述第一策略规则确定第二策略规则包括:
    根据所述第一策略规则和所述通知控制指示信息确定所述第二策略规则。
  8. 根据权利要求1至3中任一项所述的方法,其特征在于,所述根据所述第一策略规则确定第二策略规则包括:
    根据所述第一策略规则和所述第一事件的订阅确定所述第二策略规则。
  9. 一种策略规则的提供方法,其特征在于,所述方法应用于第二会话管理网元SMF,所述方法包括:
    接收第一会话管理网元SMF发送的第二消息,所述第二消息包括第一描述信息和事件订阅类型指示信息,所述事件订阅类型指示信息用于指示事件订阅的类型,所述事件订阅为针对用户设备UE的事件订阅,所述第一描述信息用于标识所述UE接收的数据;
    向策略控制网元PCF发送第七消息,所述第七消息用于请求所述第一描述信息对应的第三策略规则,所述第七消息包括所述第一描述信息和下行数据通知事件订阅触发器,所述下行数据通知事件订阅触发器根据所述事件订阅类型指示信息确定;
    接收所述PCF发送的所述第三策略规则;
    根据所述第三策略规则确定第一策略规则;
    向所述第一SMF发送所述第一策略规则。
  10. 根据权利要求9所述的方法,其特征在于,在所述接收第一会话管理网元SMF发送的第二消息之前,所述方法还包括:
    接收所述PCF发送的第一请求策略指示信息,所述第一请求策略指示信息包括报告接收到下行数据通知事件订阅的指示信息;
    向所述第一SMF发送第二请求策略指示信息,所述第二请求策略指示信息包括策略计费控制应用于所述UE的指示信息、所述报告接收到下行数据通知事件订阅的指示信息或报告接收到数据描述信息的指示信息中的至少一项。
  11. 根据权利要求9或10所述的方法,其特征在于,若所述接收所述PCF发送的所述第三策略规则包括:
    接收所述PCF发送的所述第三策略规则和通知控制指示信息,所述通知控制指示信息根据所述下行数据通知事件订阅触发器确定;
    则所述向所述第一SMF发送所述第一策略规则包括:
    向所述第一SMF发送所述第一策略规则和所述通知控制指示信息。
  12. 根据权利要求9或10所述的方法,其特征在于,所述第二消息包括第一标识,所述第一标识用于标识所述第二SMF与所述第一SMF之间的事务,所述向PCF发送第七消息之后,所述方法还包括:
    接收所述第一SMF发送的第四消息,所述第四消息包括所述第一标识和所述数据的第二描述信息;
    向所述PCF发送第八消息,所述第八消息中包括第二标识和所述第二描述信息,所述第八消息用于请求更新所述第三策略规则,所述第二标识为所述第三策略规则的标识信息,所述第二标识根据所述第一标识确定;
    接收所述PCF发送的第五策略规则,所述第五策略规则为根据所述第二描述信息更新所述第三策略规则后得到的策略规则;
    根据所述第五策略规则更新所述第一策略规则,得到第四策略规则;
    向所述第一SMF发送所述第四策略规则。
  13. 根据权利要求9或10所述的方法,其特征在于,所述第二消息包括第一标识,所述第一标识用于标识所述第二SMF与所述第一SMF之间的事务,所述向PCF发送第七消息之后,所述方法还包括:
    接收所述第一SMF发送的第六消息,所述第六消息包括所述第一标识和删除指示;
    向所述PCF发送第九消息,所述第九消息用于请求删除所述第三策略规则,所述第九消息包括所述第二标识,所述第二标识为所述第三策略规则的标识信息,所述第二标识根据所述第一标识确定。
  14. 一种会话管理网元SMF,所述SMF包括:
    第一接收单元,用于接收第一消息,所述第一消息用于请求创建第一事件的订阅,所述第一事件的订阅为针对用户设备UE的事件订阅,所述第一消息包括数据的第一描述信息,所述数据为所述UE接收的数据;
    第一发送单元,用于根据请求策略指示信息向第二会话管理网元SMF发送第二消息,所述第二消息包括所述第一描述信息,所述第二消息用于请求所述第一描述信息对应的第一策略规则;
    第二接收单元,用于接收所述第二SMF发送的所述第一策略规则;
    第一确定单元,用于根据所述第一策略规则确定第二策略规则;
    第二发送单元,用于向用户面功能网元UPF发送所述第二策略规则,以使得所述UPF对所述数据进行处理。
  15. 根据权利要求14所述的SMF,其特征在于,所述第二消息中还包括第一标识,所述第一标识用于标识所述第一SMF与所述第二SMF之间的事务,所述SMF还包括:
    第三接收单元,用于接收第三消息,所述第三消息用于请求更新所述第一事件的订阅,所述第三消息包括所述数据的第二描述信息;
    第三发送单元,用于向所述第二SMF发送第四消息,所述第四消息用于请求更新所述第一策略规则,所述第四消息中包括所述第一标识和所述第二描述信息;
    第四接收单元,用于接收所述第二SMF发送的第四策略规则,所述第四策略规则为根据所述第二描述信息更新所述第一策略规则后得到的策略规则;
    第一更新单元,用于根据所述第四策略规则更新所述第二策略规则。
  16. 根据权利要求14所述的SMF,所述第二消息中还包括第一标识,所述第一标识用于标识所述第一SMF与所述第二SMF之间的事务,所述SMF还包括:
    第五接收单元,用于接收第五消息,所述第五消息用于请求删除所述第一事件的订阅;
    第四发送单元,用于向所述第二SMF发送第六消息,所述第六消息用于请求删除所述第一策略规则,所述第六消息包括所述第一标识和删除指示。
  17. 根据权利要求14至16中任一项所述的SMF,其特征在于,所述SMF还包括:
    第六接收单元,用于接收所述第二SMF发送的所述请求策略指示信息。
  18. 根据权利要求14至16中任一项所述的SMF,其特征在于:
    所述请求策略指示信息包括策略计费控制应用于所述UE的指示信息、报告接收到下行数据通知事件订阅的指示信息或报告接收到的数据描述信息的指示信息中的至少一项。
  19. 根据权利要求14至16中任一项所述的SMF,其特征在于:
    所述第二消息中还包括事件订阅类型指示信息,所述事件订阅类型指示信息用于指示所述第一事件的订阅的类型。
  20. 根据权利要求14至16中任一项所述的SMF,其特征在于,所述第二接收单元包括:
    第一接收子单元,用于接收所述第二SMF发送的所述第一策略规则和通知控制指示信息,所述通知控制指示信息根据所述事件订阅类型指示信息确定;
    所述第一确定单元包括:
    第一确定子单元,用于根据所述第一策略规则和所述通知控制指示信息确定所述第二策略规则。
  21. 根据权利要求14至16中任一项所述的SMF,其特征在于,所述第一确定单元包括:
    第二确定子单元,用于根据所述第一策略规则和所述第一事件的订阅确定所述第二策略规则。
  22. 一种会话管理网元SMF,所述SMF包括:
    第七接收单元,用于接收第一会话管理网元SMF发送的第二消息,所述第二消息包括第一描述信息和事件订阅类型指示信息,所述事件订阅类型指示信息用于指示事件订阅的类型,所述事件订阅为针对用户设备UE的事件订阅,所述第一描述信息用于标识所述UE接收的数据;
    第五发送单元,用于向策略控制网元PCF发送第七消息,所述第七消息用于请求所述第一描述信息对应的第三策略规则,所述第七消息包括所述第一描述信息和下行数据通知事件订阅触发器,所述下行数据通知事件订阅触发器根据所述事件订阅类型指示信息确定;
    第八接收单元,用于接收所述PCF发送的所述第三策略规则;
    第二确定单元,用于根据所述第三策略规则确定第一策略规则;
    第六发送单元,用于向所述第一SMF发送所述第一策略规则。
  23. 根据权利要求22所述的SMF,其特征在于,所述SMF还包括:
    第九接收单元,用于接收所述PCF发送的第一请求策略指示信息,所述第一请求策略指示信息包括报告接收到下行数据通知事件订阅的指示信息;
    第七发送单元,用于向所述第一SMF发送第二请求策略指示信息,所述第二请求策略指示信息包括策略计费控制应用于所述UE的指示信息、所述报告接收到下行数据通知事件订阅的指示信息或报告接收到数据描述信息的指示信息中的至少一项。
  24. 根据权利要求22或23所述的SMF,其特征在于,若所述第八接收单元包括:
    第二接收子单元,用于接收所述PCF发送的所述第三策略规则和通知控制指示信息,所述通知控制指示信息根据所述下行数据通知事件订阅触发器确定;
    则所述第六发送单元包括:
    第一发送子单元,用于向所述第一SMF发送所述第一策略规则和所述通知控制指示信息。
  25. 根据权利要求22或23所述的SMF,其特征在于,所述第二消息包括第一标识,所述第一标识用于标识所述第二SMF与所述第一SMF之间的事务,所述SMF还包括:
    第十接收单元,用于接收所述第一SMF发送的第四消息,所述第四消息包括所述第一标识和所述数据的第二描述信息;
    第八发送单元,用于向所述PCF发送第八消息,所述第八消息中包括第二标识和所述第二描述信息,所述第八消息用于请求更新所述第三策略规则,所述第二标识为所述第三策略规则的标识信息,所述第二标识根据所述第一标识确定;
    第十一接收单元,用于接收所述PCF发送的第五策略规则,所述第五策略规则为根据所述第二描述信息更新所述第三策略规则后得到的策略规则;
    第二更新单元,用于根据所述第五策略规则更新所述第一策略规则,得到第四策略规则;
    第九发送单元,用于向所述第一SMF发送所述第四策略规则。
  26. 根据权利要求22或23所述的SMF,其特征在于,所述第二消息包括第一标识,所述第一标识用于标识所述第二SMF与所述第一SMF之间的事务,所述SMF还包括:
    第十二接收单元,用于接收所述第一SMF发送的第六消息,所述第六消息包括所述第一标识和删除指示;
    第十发送单元,用于向所述PCF发送第九消息,所述第九消息用于请求删除所述第三策略规则,所述第九消息包括所述第二标识,所述第二标识为所述第三策略规则的标识信息,所述第二标识根据所述第一标识确定。
  27. 一种会话管理网元SMF,其特征在于,包括:
    处理器、存储器、输入输出设备以及总线;
    所述处理器、存储器、输入输出设备与所述总线相连;
    所述处理器用于执行权利要求1至8中任一项所述的方法。
  28. 一种会话管理网元SMF,其特征在于,包括:
    处理器、存储器、输入输出设备以及总线;
    所述处理器、存储器、输入输出设备与所述总线相连;
    所述处理器用于执行权利要求9至13中任一项所述的方法。
  29. 一种计算机可读存储介质,其特征在于,所述计算机可读存储介质中保存有程序,当所述计算机执行所述程序时,执行如权利要求1至13中任一项所述的方法。
  30. 一种计算机程序产品,其特征在于,当所述计算机程序产品在计算机上执行时,所述计算机执行如权利要求1至13中任一项所述的方法。
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