WO2021018202A1 - 下行数据通知失败检测方法、amf、smf及存储介质 - Google Patents

下行数据通知失败检测方法、amf、smf及存储介质 Download PDF

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Publication number
WO2021018202A1
WO2021018202A1 PCT/CN2020/105542 CN2020105542W WO2021018202A1 WO 2021018202 A1 WO2021018202 A1 WO 2021018202A1 CN 2020105542 W CN2020105542 W CN 2020105542W WO 2021018202 A1 WO2021018202 A1 WO 2021018202A1
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Prior art keywords
ddn
amf
smf
failure
downlink data
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PCT/CN2020/105542
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English (en)
French (fr)
Inventor
李志军
王全
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中兴通讯股份有限公司
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Priority claimed from CN201910690733.5A external-priority patent/CN112312461B/zh
Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Publication of WO2021018202A1 publication Critical patent/WO2021018202A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like

Definitions

  • the embodiment of the present invention relates to but not limited to the field of communication technology, specifically, relates to but not limited to a downlink data notification failure detection method, AMF, SMF, and storage medium.
  • the 5G system includes the wireless subsystem 5G RAN (5G Radio Access Network, 5G wireless Access system), 5G core network subsystem 5GC (5G Core, 5G core network); among them, the 5G core network subsystem part mainly includes UDM (Unified Data Management, unified data management function), AMF (Access Management Function, access Access management function), SMF (Session Management Function), UPF (User Plane Function), PCF (Policy Control Function, policy control function), among them: AMF supports subscription and reporting of many events, such as Registration Status Report (Registration Status Report), Connection Status Report (Connection Status Report), Location Zone Report (Location Report), Time Zone Report (TimeZone Report), Reachability Report (Reachability Report), Downlink Data Notification Failure Report (DDN) Failure Report) and so on.
  • UDM Unified Data Management, unified data management function
  • AMF Access Management Function, access Access management function
  • SMF Session Management Function
  • UPF User Plane Function
  • PCF Policy Control Function, policy control function
  • AMF supports subscription
  • AMF cannot detect downlink data notification failure events. Although AMF provides a subscription for downlink data notification failure reports, only SMF can detect downlink data notification failures, and SMF will not notify downlink data failures. Report to AMF.
  • the downlink data notification failure detection method, AMF, SMF, and storage medium provided by the embodiments of the present invention mainly solve the technical problem that the AMF cannot detect the downlink data notification failure in the related art, and thus cannot provide the downlink data notification failure report.
  • an embodiment of the present invention provides a downlink data notification failure detection method, including:
  • AMF obtains downlink data to notify DDN information
  • the AMF generates a DDN failure report.
  • the embodiment of the present invention also provides a downlink data notification failure detection method, including:
  • SMF sends DDN information to AMF.
  • the embodiment of the present invention also provides an AMF, including: a first processor, a first memory, and a first communication bus;
  • the first communication bus is configured to realize connection and communication between the first processor and the first memory
  • the first processor is configured to execute one or more programs stored in the first memory to implement the steps of the downlink data notification failure detection method implemented by the AMF.
  • the embodiment of the present invention also provides an SMF, including a second processor, a second memory, and a second communication bus;
  • the second communication bus is configured to realize connection and communication between the second processor and the second memory
  • the second processor is configured to execute one or more programs stored in the second memory to implement the steps of the downlink data notification failure detection method implemented by the above SMF.
  • the embodiment of the present invention also provides a storage medium, the storage medium stores one or more programs, and the one or more programs can be executed by one or more processors, so as to realize the failure detection method of downlink data notification implemented by AMF. Steps, and/or to implement the steps of the downlink data notification failure detection method implemented by the above SMF.
  • the downlink data notification DDN information sent by the SMF is obtained through the AMF, and the AMF generates the DDN failure report; in some implementation processes, the AMF is based on the SMF The sent DDN information learns that the downlink data notification has failed, thereby generating a DDN failure report.
  • Figure 1 is a schematic diagram of the architecture of a 5G system in related technologies
  • FIG. 2 is a flowchart of a method for detecting failure of downlink data notification in Embodiment 1 of the present invention
  • Fig. 3 is a flowchart of a method for detecting failure of downlink data notification according to the second embodiment of the present invention
  • FIG. 5 is a flowchart of a method for detecting failure of downlink data notification in the fourth embodiment of the present invention.
  • FIG. 6 is a flowchart of a method for detecting failure of downlink data notification according to Embodiment 5 of the present invention.
  • FIG. 7 is a schematic diagram of the structure of the AMF in the sixth embodiment of the present invention.
  • FIG. 8 is a schematic diagram of the structure of the SMF in the sixth embodiment of the present invention.
  • FIG. 1 is a schematic diagram of the architecture of a 5G system in related technologies, which is composed of a number of NFs (Network Functions).
  • the 5G wireless subsystem mainly includes NR (New Radio, a new generation of wireless base stations).
  • the 5G core network subsystem mainly includes UDM (Unified Data Management, unified data management function), AMF (Access Management Function, access management function), SMF (Session Management Function, session management function), UPF (User Plane Function, User plane function), PCF (Policy Control Function, policy control function), among which: UDM: unified data management function, which is the permanent storage location of user subscription data, located in the home network of the user contract; AMF: access management function, for users Manage the needs of access to the network, and be responsible for the NAS layer from the terminal to the network: signaling management, user mobility management and other functions; SMF: session management function, management of user PDU (Packet Data Unit, packet data unit) sessions, QoS Flow, formulate packet inspection and forwarding rules for UPF; UPF: user plane function, responsible for IP data, non-IP data routing and forwarding, usage reporting and other functions. PCF: Policy control function, responsible for providing various levels of policy rules for AMF and SMF.
  • NEF Network capability disclosure function, which opens
  • NEF can subscribe to various NFs in the 5G network for required events, and when an event occurs, the NF can report the corresponding event notification to the NEF.
  • AMF supports subscriptions and reports of many events, such as Registration Status Report, Connection Status Report, Location Report, TimeZone Report, and Reachability Report Report), Downlink Data Notification Failure Report (DDN Failure Report), etc.
  • the SMF can detect the downlink data notification failure, and the SMF does not report the downlink data notification failure to the AMF.
  • the embodiment of the present invention provides a downlink data notification failure detection method implemented by AMF.
  • the downlink data notification failure detection method includes:
  • the AMF obtains DDN information.
  • the AMF generates a DDN failure report according to the DDN information.
  • the AMF obtains the DDN information (downlink data notification information, DDN Info) sent by the SMF, and directly or indirectly learns the failure of the downlink data notification according to the DDN information, and generates a DDN failure report (downlink data notification failure report, DDN Failure) Report).
  • DDN information downlink data notification information, DDN Info
  • DDN Failure downlink data notification failure report
  • the DDN information includes a DDN indication (DDN Indication).
  • DDN Indication DDN Indication
  • the AMF receives the N1N2 message transfer request (N1N2MessageTransfer Request) sent by the SMF, and the N1N2 message transfer request carries: N1 session container (N1 SM container), N2 session information (N2 SM Information), N3 tunnel information, Paging Policy Indicator, etc.;
  • the N1N2 message transmission request also carries a DDN indicator, which is used to indicate that the N1N2 message transmission request is based on the DDN message. Triggered.
  • UPF receives downlink data
  • UPF detects that there is no N3 tunnel information, that is, the bearer between UPF and AN has been released
  • UPF triggers a Downlink Data Notification (DDN) process to SMF
  • UPF sends a downlink data notification ( DDN) message
  • DDN downlink data notification
  • the DDN failure report generated includes: when the DDN indication is not received, AFM does not know what message triggered the N1N2 message transmission request. After receiving the DDN indication, based on the DDN indication, AFM determines the The N1N2 message transmission request is triggered by the DDN message. When the UE is in an unreachable state or the AMF fails to page the UE, the AMF generates a DDN failure report.
  • the AMF When the UE is in the CM-IDLE state, and the AMF determines that the UE is Unable to reach the UE, it is determined that the UE is unreachable, and then the AMF will determine that the SMF DDN process will fail according to the DDN indication and the UE unreachable state, resulting in DDN Failure report:
  • the AMF When the UE is in the CM-IDLE state, the AMF will send a paging message to the UE.
  • the AMF fails to page the UE, the AMF generates a DDN failure report.
  • the DDN information includes the DDN failure report, that is, the AMF directly obtains the DDN failure report, and then generates the DDN failure report.
  • the generated DDN failure report and the acquired DDN failure report can be the same, or the AMF can add some information on the basis of the acquired DDN failure report to generate a new DDN failure report.
  • AMF obtains a DDN failure report
  • AMF receives an external NF (such as NEF) subscription for a downlink data notification failure event
  • receives an external NF such as NEF
  • the subscription event is a DDN failure
  • the SMF detects downlink data
  • AMF can implicitly subscribe DDN failure events to SMF; specifically, AMF obtains DDN failure reports including: AMF receives N1N2 message transmission request sent by SMF, AMF returns N1N2 message transmission response (N1N2MessageTransfer Response) to SMF, N1N2 message transmission response It carries the Report DDN Failure Indication, and then the AMF receives the DDN failure report sent by the SMF when the downlink data notification process fails.
  • the SMF sends the N1N2 message transmission request to the AMF. Unlike the AMF directly learning that the DDN fails, the N1N2 message transmission request does not need to carry the DDN indication.
  • the AMF does not know what message the N1N2 message transmission request is triggered based on.
  • the N1N2 message transmission response returned by AMF to SMF carries a report DDN failure indication.
  • the report DDN failure indication is used to indicate that AMF wants SMF to send a DDN failure report to AMF when DDN fails.
  • N1N2 message transmission request It is triggered based on the DDN message, and SMF determines that the current DDN process fails according to the cause value (Cause) indicated by the AMF in the N1N2 message transmission response, such as: UE is unreachable and paging fails; when SMF determines that the current DDN process fails , SMF generates a DDN failure report, and sends the DDN failure report to AMF.
  • cause value indicated by the AMF in the N1N2 message transmission response
  • AMF can also explicitly subscribe to the SMF for the DDN failure event.
  • the failure of the AMF to obtain the DDN includes: the AMF sends an event subscription request to the SMF, the event type in the event subscription request is DDN failure, and the AMF receives the SMF DDN failure report sent when DDN failure is detected, where AMF initiates an event subscription request to SMF can be when AMF receives other NF (such as UDM, NEF) subscription to DDN failure event, it can initiate event subscription to SMF; AMF It can also initiate event subscription to SMF as needed when the PDU session is established.
  • NF such as UDM, NEF
  • AMF Unlike AMF implicitly subscribing to SMF, when AMF returns a N1N2 message transmission response to SMF, it does not carry a DDN failure indication. When SMF determines that the current DDN process fails, SMF generates a DDN failure report and reports the DDN failure. Send to AMF.
  • the AMF receiving the DDN failure report sent by the SMF may be that the AMF directly receives the DDN failure report sent by the SMF; that is, the SMF directly Send a DDN failure report to AMF, and send the DDN failure report generated by SMF directly to AMF; it can also be an event report sent by AMF receiving SMF Event Report, which carries the DDN failure report, and then AMF generates DDN based on the event report Failure report.
  • the embodiment of the present invention provides a downlink data notification failure detection method. Two methods are provided. 1) After the AMF receives an external NF (such as NEF) subscription to the downlink data notification failure event, it initiates an event subscription to the SMF to subscribe to the event Notify failure for downlink data. When SMF detects that the downlink data notification process has failed, it reports the downlink data notification failure to AMF; 2) In the service request process initiated by the network side, when SMF receives a downlink data notification request from UPF, SMF sends a N1N2 message transmission to AMF Request, and carry the DDN indication in the N1N2 message transmission request. The AMF obtains the DDN indication from the N1N2 message transmission request.
  • NEF an external NF
  • the purpose of the DDN indication is to let the AMF know that the N1N2 message transmission request is triggered by the DDN message received by the SMF; thus, when the AMF judges that the UE is out of reach and fails to page the UE , AMF can determine the failure of the downlink data notification process, so that AMF can generate a downlink data notification failure report.
  • the AMF can directly or indirectly learn that the downlink data notification fails, thereby generating a downlink data notification failure report.
  • the embodiment of the present invention provides a downlink data notification failure detection method implemented by SMF. As shown in FIG. 3, the downlink data notification failure detection method includes:
  • the SMF sends DDN information to the AMF, and the DDN information is used by the AMF to generate a DDN failure report.
  • the DDN information includes a DDN indication, which is used to indicate that the N1N2 message transmission request is triggered based on the DDN message; or the DDN information includes a DDN failure report; that is, the SMF can directly send the DDN failure report to the AMF, and The DDN indication can be used to make the AMF judge the DDN failure by itself and generate a DDN failure report.
  • the SMF sends a DDN indication to AMF specifically including: SMF sends an N1N2 message transmission request to AMF, and the N1N2 message transmission request carries the DDN indication; in the service request process initiated by the network side, when the SMF receives the UPF downlink data notification request, The SMF sends an N1N2 message transmission request to the AMF, and carries the DDN indication in the N1N2 message transmission request.
  • the AMF obtains the DDN indication from the N1N2 message transmission request.
  • the purpose of the DDN indication is to let the AMF know that the N1N2 message transmission request is triggered by the DDN message received by the SMF; thus, when it is judged that the UE is unreachable and paging the UE fails, The AMF can determine the failure of the downlink data notification process, so that the AMF can generate a DDN failure report.
  • Case 1 The SMF receives the N1N2 message transmission response sent by the AMF, and the N1N2 message transmission response carries a DDN failure indication; when the downlink data notification process fails, the SMF sends a DDN failure report to the AMF. That is, SMF sends an N1N2 message transmission request to AMF, and the message carries information in related technologies, such as N1 session container, N2 session information, N3 tunnel information, paging policy indication, etc.
  • AMF does not know that the N1N2 message transmission request is based on What message triggers; AMF returns to SMF a N1N2 message transmission response carrying a DDN failure indication, which is used to indicate that AMF hopes SMF to send a DDN failure report to AMF when DDN fails, and SMF generates a DDN failure report when SMF determines that the current DDN process fails , And send the DDN failure report to AMF.
  • a DDN failure indication which is used to indicate that AMF hopes SMF to send a DDN failure report to AMF when DDN fails, and SMF generates a DDN failure report when SMF determines that the current DDN process fails , And send the DDN failure report to AMF.
  • Case 2 SMF receives an event subscription request sent by AMF, and the event type in the event subscription request is DDN failure; SMF sends a DDN failure report to AMF when detecting DDN failure. That is, AMF directly subscribes to SMF for DDN failure events.
  • SMF When SMF determines that the current DDN process fails, SMF generates a DDN failure report and sends the DDN failure report to AMF; AMF initiates an event subscription request to SMF when AMF receives other NFs (Such as UDM, NEF) After subscribing to the DDN failure event, it can initiate an event subscription to the SMF; AMF can also initiate an event subscription to the SMF as needed when the PDU session is established; different from the case 1, AMF is returning to the SMF When the N1N2 message transmits the response, it does not carry an indication of reporting DDN failure.
  • NFs Such as UDM, NEF
  • SMF can directly send the generated DDN failure report to AMF directly, or SMF can send an event report to AMF (Event Report), which includes the DDN failure report, and then AMF According to the event report, a DDN failure report is generated, where the DDN failure report generated by AMF may be the same or different from the DDN failure report generated by SMF.
  • Event Report Event Report
  • the AMF initiates an event subscription to the SMF, and the subscription event is the downlink data notification failure, and then when the SMF detects that the downlink data notification process fails, it reports the downlink data notification failure to the AMF; or SMF sends N1N2 message transmission request to AMF, and carries DDN indication in N1N2 message transmission request.
  • AMF judges DDN failure according to DDN indication when N1N2 message delivery fails, and generates DDN failure report; the downlink data notification provided by the embodiment of the present invention fails
  • the detection method allows the AMF to obtain the DDN failure information and generate a downlink data failure report accordingly.
  • the embodiment of the present invention uses a more specific example to illustrate the method for detecting failure of downlink data notification.
  • the downlink data notification failure detection method includes:
  • the UPF receives downlink data. If UPF detects that there is no N3 tunnel information, that is, the bearer between UPF and AN has been released, UPF triggers a downlink data notification process to SMF.
  • the UPF sends a downlink data notification (DDN) message to the SMF.
  • DDN downlink data notification
  • S402b The SMF returns a downlink data notification response (DDN ACK) message to the UPF.
  • DDN ACK downlink data notification response
  • the SMF sends a N1N2 message transmission request to the AMF.
  • the SMF carries a DDN indication (DDN Indication), which is used to indicate that the N1N2 message transmission request is triggered according to the DDN message.
  • DDN Indication DDN Indication
  • the AMF returns a N1N2 message transmission response to the SMF.
  • the AMF immediately returns a N1N2 message transmission response to the SMF, and indicates that the cause value is "Attempting to reach the UE".
  • the AMF If the UE is in the CM-IDLE state, and the AMF judges that the UE is unreachable, the AMF returns a N1N2 message transmission response to the SMF, and indicates that the cause value is "Unable to reach UE.”
  • the AMF immediately returns an N1N2 message transmission response to the SMF, and indicates that the cause value is "N1/N2 transfer success" (N1/N2 transfer success).
  • step S403c if the UE is unreachable in step S403b, the AMF generates a downlink data notification failure report.
  • the AMF judges that the downlink data notification process on the SMF will fail, thereby generating a downlink data notification failure report.
  • the SMF if the SMF learns from the AMF that the UE is unreachable, the SMF returns a failure notification to the UPF.
  • S405a If the AMF fails to page the UE, the AMF sends an N1N2 Transfer Failure Notification (N1N2 Transfer Failure Notification) message to the SMF;
  • N1N2 Transfer Failure Notification N1N2 Transfer Failure Notification
  • the AMF judges that the downlink data notification process on the SMF will fail according to the DDN indication in step S403a and the paging failure in steps S404a to S404b, thereby generating a downlink data notification failure report.
  • step S405c After receiving the N1N2 transmission failure notification in step S405a, the SMF sends a failure notification to the UPF;
  • the PDU session and N3 tunnel are restored, and the UPF can directly send downlink data to the RAN through the N3 tunnel.
  • the UPF sends downlink data to the RAN, and the RAN sends the downlink data to the UE.
  • the embodiment of the present invention provides a downlink data notification failure detection method.
  • the N1N2 message sent by the AMF according to the SMF carries the DDN indication, UE unreachable status, and paging failure to determine the current DDN process failure, and then learn the DDN process failure information, Proactively generate DDN failure reports.
  • the embodiment of the present invention uses a more specific example to describe the downlink data notification failure detection method.
  • the SMF sends the N1N2 message transmission request to the AMF
  • the AMF sends the N1N2 message transmission response and implicitly subscribes to the DDN failure report.
  • the SMF detects When DDN fails, a DDN failure report is sent to AMF.
  • the downlink data notification failure detection method includes:
  • S501 The UPF receives downlink data.
  • UPF sends a DDN message to SMF.
  • S502b The SMF returns a DDN ACK message to the UPF.
  • the UPF sends the downlink data to the SMF.
  • the SMF sends a N1N2 message transmission request to the AMF.
  • the AMF returns a N1N2 message transmission response to the SMF, and fills in an appropriate cause value (Cause) according to the CM status of the UE and UE accessibility.
  • an appropriate cause value (Cause) according to the CM status of the UE and UE accessibility.
  • the AMF carries a report DDN failure indication (Report DDN Failure Indication), which is used to indicate that the AMF wants the SMF to send a DDN failure report to the AMF when the DDN fails.
  • Report DDN Failure Indication Report DDN Failure Indication
  • S503c If the SMF learns from the AMF that the UE is unreachable, the SMF returns a failure notification to the UPF;
  • the SMF can determine the current DDN process failure according to the cause value (Cause) indicated by the AMF in the N1N2 Message Transfer Response (N1N2MessageTransfer Response), such as: the UE is unreachable and paging fails.
  • cause value (Cause) indicated by the AMF in the N1N2 Message Transfer Response (N1N2MessageTransfer Response)
  • N1N2MessageTransfer Response such as: the UE is unreachable and paging fails.
  • the SMF generates a DDN failure report, that is, a downlink data notification failure report, and sends the DDN failure report to the AMF;
  • the SMF can directly send a DDN failure report message to the AMF; or, the SMF sends an event report (Event Report) to the AMF, which includes the DDN failure report.
  • Event Report an event report
  • S506a If the AMF fails to page the UE, the AMF sends a N1N2 transmission failure notification message to the SMF;
  • step S506b After receiving the N1N2 transmission failure notification in step S305a, the SMF sends a failure notification to the UPF;
  • SMF can judge the current DDN process failure according to the N1N2 transmission failure notification sent by AMF.
  • the SMF generates a DDN failure report, that is, a downlink data notification failure report, and sends the DDN failure report to the AMF.
  • the UPF sends downlink data to the RAN, and the RAN sends the downlink data to the UE.
  • the embodiment of the present invention provides a downlink data notification failure detection method.
  • the DDN failure indication is carried, indicating that the AMF expects the SMF to send the DDN failure report to the AMF when the DDN fails. And status, paging failure, to determine the current DDN process failure, and then generate a DDN failure report, and send the DDN failure report to AMF.
  • the embodiment of the present invention uses a more specific example to describe the downlink data notification failure detection method.
  • AMF explicitly subscribes to the SMF for the downlink data notification failure event.
  • the SMF detects the downlink data notification failure
  • the downlink data notification fails to be sent to the AMF.
  • the report, as shown in Figure 6, the downlink data notification failure detection method includes:
  • the AMF sends an event subscription request (Event Subscription Request) to the SMF, indicating that the event type is DDN Failure (DDN Failure).
  • Event Subscription Request Event Subscription Request
  • DDN Failure DDN Failure
  • the AMF When the AMF receives a subscription to the DDN failure event from other NFs (such as UDM, NEF), it can initiate an event subscription to the SMF. AMF can also initiate event subscription to SMF as needed when a PDU session is established.
  • NFs such as UDM, NEF
  • the SMF accepts the AMF's event subscription request, and returns an event subscription response (EventSubscribeResponse).
  • UPF receives downlink data.
  • UPF sends a DDN message to SMF.
  • S602b The SMF returns a DDN ACK message to the UPF.
  • the UPF sends the downlink data to the SMF.
  • S603a The SMF sends a N1N2 message transmission request to the AMF.
  • the AMF returns a N1N2 message transmission response to the SMF, and fills in an appropriate cause value (Cause) according to the CM status of the UE and UE accessibility.
  • the SMF generates a DDN failure report, that is, a downlink data notification failure report, and sends the DDN failure report to the AMF;
  • the SMF can directly send a DDN failure report message to the AMF; or, the SMF sends an event report (Event Report) to the AMF, which includes the DDN failure report.
  • Event Report an event report
  • S606a If the AMF fails to page the UE, the AMF sends a N1N2 transmission failure notification message to the SMF;
  • step S606b After receiving the N1N2 transmission failure notification in step S305a, the SMF sends a failure notification to the UPF;
  • SMF can judge the failure of the DDN process in the situation according to the N1N2 transmission failure notification sent by AMF.
  • the SMF generates a DDN failure report, that is, a downlink data notification failure report, and sends the DDN failure report to the AMF.
  • the UPF sends downlink data to the RAN, and the RAN sends the downlink data to the UE.
  • the embodiment of the present invention provides a downlink data notification failure detection method.
  • AMF sends an event subscription request to SMF and indicates that the event type is DDN failure.
  • SMF judges that the current DDN process fails according to the unreachable state of the UE and paging failure, and then Generate a DDN failure report, and send the DDN failure report to AMF.
  • the embodiment of the present invention provides an AMF, as shown in FIG. 7, including a first processor 701, a first memory 702, and a first communication bus 703;
  • the first communication bus 703 is configured to implement connection and communication between the first processor 701 and the first memory 702;
  • the first processor 701 is configured to execute one or more programs stored in the first memory 702 to implement the steps of the downlink data notification failure detection method implemented by the AMF in the foregoing embodiment.
  • the embodiment of the present invention provides an SMF, as shown in FIG. 8, including a second processor 801, a second memory 802, and a second communication bus 803;
  • the second communication bus 803 is configured to implement connection and communication between the second processor 801 and the second memory 802;
  • the second processor 801 is configured to execute one or more programs stored in the second memory 802 to implement the steps of the downlink data notification failure detection method implemented by the SMF in the foregoing embodiment.
  • the embodiment of the present invention also provides a storage medium, the storage medium stores one or more programs, and the one or more programs can be executed by one or more processors, so as to realize the downlink data realized by the AMF of the foregoing embodiment.
  • the steps of the notification failure detection method, and/or the steps of the downlink data notification failure detection method implemented by the SMF of the foregoing embodiment, and/or the steps of the downlink data notification failure detection method implemented by the AMF and SMF of the foregoing embodiment are examples of the notification failure detection method, and/or the steps of the downlink data notification failure detection method implemented by the AMF and SMF of the foregoing embodiment.
  • the storage medium includes volatile or nonvolatile, removable or non-removable implemented in any method or technology used to store information (such as computer-readable instructions, data structures, computer program modules, or other data) Medium.
  • Storage media includes but not limited to RAM (Random Access Memory), ROM (Read-Only Memory, read-only memory), EEPROM (Electrically Erasable Programmable read only memory), flash memory Or other memory technologies, CD-ROM (Compact Disc Read-Only Memory), digital versatile disk (DVD) or other optical disk storage, magnetic cartridges, magnetic tapes, disk storage or other magnetic storage devices, or can be used Any other medium that can store desired information and can be accessed by a computer.
  • RAM Random Access Memory
  • ROM Read-Only Memory
  • EEPROM Electrically Erasable Programmable read only memory
  • flash memory Or other memory technologies CD-ROM (Compact Disc Read-Only Memory), digital versatile disk (DVD) or other optical disk storage, magnetic cartridges, magnetic tapes, disk storage or other magnetic storage devices, or
  • communication media usually contain computer-readable instructions, data structures, computer program modules, or other data in a modulated data signal such as a carrier wave or other transmission mechanism, and may include any information delivery medium. Therefore, the present invention is not limited to any specific combination of hardware and software.

Abstract

本发明实施例提供一种下行数据通知失败检测方法、AMF、SMF及存储介质，其中，该方法包括：通过AMF获取SMF发送的下行数据通知DDN信息，AMF根据DDN信息产生DDN失败报告；在某些实施过程中，由AMF根据SMF发送的DDN信息，获知下行数据通知失败，从而产生DDN失败报告。

Description

下行数据通知失败检测方法、AMF、SMF及存储介质 技术领域
本发明实施例涉及但不限于通信技术领域，具体而言，涉及但不限于下行数据通知失败检测方法、AMF、SMF及存储介质。
背景技术
3GPP(3rd Generation Partnership Project，第三代合作伙伴计划)目前正在进行5G(5th Generation)系统的研究，根据3GPP标准工作组的定义，5G系统包括无线子系统5G RAN(5G Radio Access Network，5G无线接入系统)、5G核心网子系统5GC(5G Core，5G核心网)；其中，5G核心网子系统部分，主要包含UDM(Unified Data Management，统一数据管理功能)、AMF(Access Management Function，接入管理功能)、SMF(Session Management Function，会话管理功能)、UPF(User Plane Function，用户面功能)、PCF(Policy Control Function，策略控制功能)，其中：AMF支持诸多事件的订阅和报告，如注册状态报告(Registration Status Report)、连接状态报告(Connection Status Report)、位置区域报告(Location Report)、时间区域报告(TimeZone Report)、可及状态报告(Reachability Report)、下行数据通知失败报告(DDN Failure Report)等等。
在相关技术下，AMF并不能检测到下行数据通知失败事件，虽然AMF提供了对下行数据通知失败报告的订阅，然而只有SMF能检测到下行数据通知失败，而SMF并不会将下行数据通知失败报告给AMF。
发明内容
本发明实施例提供的下行数据通知失败检测方法、AMF、SMF及存储介质，主要解决的技术问题是相关技术中AMF无法检测下行数据通知失败，进而无法提供下行数据通知失败报告的问题。
为解决上述技术问题，本发明实施例提供一种下行数据通知失败检测方法，包括：
AMF获取下行数据通知DDN信息；
所述AMF产生DDN失败报告。
本发明实施例还提供一种下行数据通知失败检测方法，包括：
SMF向AMF发送DDN信息。
本发明实施例还提供一种AMF，包括：第一处理器、第一存储器和第一通信总线；
所述第一通信总线设置为实现所述第一处理器和第一存储器之间的连接通信；
所述第一处理器设置为执行所述第一存储器中存储的一个或者多个程序，以实现如上述AMF实现的所述下行数据通知失败检测方法的步骤。
本发明实施例还提供一种SMF，包括第二处理器、第二存储器和第二通信总线；
所述第二通信总线设置为实现所述第二处理器和第二存储器之间的连接通信；
所述第二处理器设置为执行所述第二存储器中存储的一个或者多个程序，以实现如上SMF实现的所述下行数据通知失败检测方法的步骤。
本发明实施例还提供一种存储介质，存储介质存储有一个或者多个程序，一个或者多个程序可被一个或者多个处理器执行，以实现如上述AMF实现的下行数据通知失败检测方法的步骤，和/或以实现如上述SMF实现的下行数据通知失败检测方法的步骤。
本发明的有益效果是：
根据本发明实施例提供的下行数据通知失败检测方法、AMF、SMF及存储介质，通过AMF获取SMF发送的下行数据通知DDN信息，AMF产生DDN失败报告；在某些实施过程中，由AMF根据SMF发送的DDN信息，获知下行数据通知失败，从而产生DDN失败报告。
本发明其他特征和相应的有益效果在说明书的后面部分进行阐述说明，且应当理解，至少部分有益效果从本发明说明书中的记载变的显而易见。
附图说明
图1为相关技术中的5G系统的架构示意图；
图2为本发明实施例一的下行数据通知失败检测方法的流程图；
图3是本发明实施例二的一种下行数据通知失败检测方法的流程图；
图4为本发明实施例三的下行数据通知失败检测方法的流程图；
图5为本发明实施例四的下行数据通知失败检测方法的流程图；
图6为本发明实施例五的下行数据通知失败检测方法的流程图；
图7为本发明实施例六的AMF的结构示意图；
图8为本发明实施例六的SMF的结构示意图。
具体实施方式
为了使本发明的目的、技术方案及优点更加清楚明白，下面通过具体实施方式结合附图对本发明实施例作进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。
如图1所示，图1为相关技术中的5G系统的架构示意图，由若干的NF(Network Function，网络功能)构成。其中，5G无线子系统部分，主要包括NR(New Radio，新一代无线基站)。5G核心网子系统部分，主要包含UDM(Unified Data Management，统一数据管理功能)、AMF(Access Management Function，接入管理功能)、SMF(Session Management Function，会话管理功能)、UPF(User Plane Function，用户面功能)、PCF(Policy Control Function，策略控制功能)，其中：UDM：统一数据管理功能，是用户签约数据的永久存放地点，位于用户签约的归属网；AMF：接入管理功能，对用户接入到网络的需求进行管理，负责终端到网络的NAS层：信令管理、用户移动性管理等功能；SMF：会话管理功能，管理用户的PDU(Packet Data Unit，分组数据单元)会话、QoS流，为UPF制定包检测和转发规则等；UPF：用户面功能，负责IP数据、非IP数据的路由和转发、用量上报等功能。PCF：策略控制功能，负责为AMF、SMF提供各级别策略规则。NEF：网络能力公开功能，对5G网络外部开放和控制网络能力。
在很多业务中，外部应用需要获知终端在5G网络内的各种事件，比如注册到网络、从网络去注册、进入移出特定区域、等等。为了支持此类业务，NEF可以向5G网络内各种NF订阅所需要的事件，当事件发生时NF即可将对应的事件通知报告给NEF。
AMF支持诸多事件的订阅和报告，如注册状态报告(Registration Status Report)、连接状态报告(Connection Status Report)、位置区域报告(Location Report)、时间区域报告(TimeZone Report)、可及状态报告(Reachability Report)、下行数据通知失败报告(DDN Failure Report)、等等。
然而，在相关技术中的网络侧触发的服务请求流程下，SMF能检测到下行数据通知失败，而SMF并不会将下行数据通知失败报告给AMF。
为了解决上述问题，本发明实施例提供一种由AMF实现的下行数据通知失败检测方法，如图2所示，该下行数据通知失败检测方法包括：
S201、AMF获取DDN信息。
S202、AMF根据DDN信息产生DDN失败报告。
在本发明实施例中，AMF获取SMF发送的DDN信息(下行数据通知信息，DDN Info)，根据该DDN信息直接或间接获知下行数据通知失败，产生DDN失败报告(下行数据通知失败报告，DDN Failure Report)。其中直接获知指的是，AMF自身判定下行数据通知失败；间接获知指的是，AMF被告知下行数据通知失败。
当AMF根据DDN信息直接获知下行数据通知失败，产生DDN失败报告时，该DDN信息包括DDN指示(DDN Indication)。具体的，在网络侧触发的服务请求流程中，AMF接收SMF发送的N1N2消息传输请求(N1N2MessageTransfer Request)，其中在N1N2消息传输请求中携带：N1会话容器(N1 SM Container)、N2会话信息(N2 SM Information)、携带N3隧道信息、寻呼策略指示(Paging Policy Indicator)等；除此之外，N1N2消息传输请求还携带有DDN指示，该DDN指示用于表明N1N2消息传输请求是根据DDN消息所触发的。例如UPF收到下行数据，如果UPF检测到没有N3隧道信息，即UPF和AN间承载已释放，则UPF向SMF触发下行数据通知(Downlink Data Notification，DDN)流程，UPF向SMF发送下行数据通知(DDN)消息，进而SMF向AMF发送根据DDN消息所触发的N1N2消息传输请求。
AMF接收到DDN信息后，产生DDN失败报告具体包括：在未接收到DDN指示时，AFM并不知道N1N2消息传输请求是什么消息触发的， 当接收到DDN指示后，基于DDN指示，AFM确定该N1N2消息传输请求是根据DDN消息所触发，在UE为不可及状态或AMF寻呼UE失败时，AMF产生DDN失败报告。当UE在CM-IDLE状态，并且AMF判定UE不可及(Unable to reach UE)，确定UE为不可及，进而AMF将根据DDN指示和UE不可及状态，确定SMF的DDN流程将失败，从而产生DDN失败报告；当UE在CM-IDLE状态，则AMF会向UE发送寻呼消息，当AMF寻呼UE失败时，AMF产生DDN失败报告。
在本发明实施例中，当AMF根据DDN信息间接获知下行数据通知失败，产生DDN失败报告时，该DDN信息包括DDN失败报告，即AMF直接获取到DDN失败报告，进而产生DDN失败报告，其中AMF产生的DDN失败报告与获取到的DDN失败报告可以是相同，也可以是AMF在获取到的DDN失败报告的基础上添加某些信息，生成新的DDN失败报告。
需要说明的是，AMF获取DDN失败报告，是在AMF接收到外部NF(如NEF)对下行数据通知失败事件的订阅后，向SMF发起事件订阅，订阅事件为DDN失败；当SMF检测到下行数据通知流程失败时，向AMF报告DDN失败。其中AMF可以隐式地向SMF订阅DDN失败事件；具体的，AMF获取DDN失败报告包括：AMF接收SMF发送的N1N2消息传输请求，AMF向SMF返回N1N2消息传输响应(N1N2MessageTransfer Response)，N1N2消息传输响应中携带汇报DDN失败指示Report DDN Failure Indication，之后AMF接收SMF在下行数据通知流程失败时发送的DDN失败报告。在本发明实施例中，SMF向AMF发送N1N2消息传输请求，与AMF直接获知DDN失败不同，该N1N2消息传输请求中无需携带DDN指示，此时AMF不知道N1N2消息传输请求是根据什么消息触发，AMF想要知道DDN失败时，在AMF向SMF返回N1N2消息传输响应中携带汇报DDN失败指示，汇报DDN失败指示用于表明AMF希望 SMF在DDN失败时向AMF发送DDN失败报告，当N1N2消息传输请求是根据DDN消息触发，且SMF根据AMF在N1N2消息传输响应中所指示的原因值(Cause)，如：UE不可及、寻呼失败，来判定当前DDN流程失败；当SMF判定当前DDN流程失败时，SMF产生DDN失败报告，并将该DDN失败报告发送给AMF。
在本发明实施例中，AMF还可以显式地向SMF订阅DDN失败事件，具体的，AMF获取DDN失败包括：AMF向SMF发送事件订阅请求，事件订阅请求中事件类型为DDN失败，AMF接收SMF在检测到DDN失败时发送的DDN失败报告，其中AMF向SMF发起事件订阅请求可以是当AMF收到其他NF(如UDM、NEF)对DDN失败事件的订阅后，可对SMF发起事件订阅；AMF也可以是在PDU会话建立时，根据需要对SMF发起事件订阅。与AMF隐式地向SMF订阅不同，AMF在向SMF返回N1N2消息传输响应时，并没有携带汇报DDN失败指示，当SMF判定当前DDN流程失败时，SMF产生DDN失败报告，并将该DDN失败报告发送给AMF。
值得注意的是，在本发明实施例中，当AMF向SMF显式地或隐式地订阅DDN失败，AMF接收SMF发送的DDN失败报告可以是AMF直接接收SMF发送的DDN失败报告；即SMF直接向AMF发送DDN失败报告，将SMF将产生的DDN失败报告直接发给AMF；也可以是AMF接收SMF发送的事件报告Event Report，事件报告中携带DDN失败报告，之后AMF根据该事件报告，产生DDN失败报告。
本发明实施例提供一种下行数据通知失败检测方法，提供了两种方法，1)在AMF接收到外部NF(如NEF)对下行数据通知失败事件的订阅后，向SMF发起事件订阅，订阅事件为下行数据通知失败。当SMF检测到下行数据通知流程失败时，向AMF报告下行数据通知失败；2)在网络侧发 起的服务请求流程中，当SMF收到UPF的下行数据通知请求时，SMF向AMF发送N1N2消息传输请求，并在N1N2消息传输请求中携带DDN指示。AMF从N1N2消息传输请求中获得DDN指示，该DDN指示的目的，是让AMF知道该N1N2消息传输请求是由SMF收到DDN消息触发的；从而，当AMF判断UE不可及、寻呼UE失败时，AMF可断定下行数据通知流程的失败，从而AMF可产生下行数据通知失败报告。通过上述两种方法，可以使AMF直接或者间接地获知下行数据通知失败，从而产生下行数据通知失败报告。
本发明实施例提供了一种由SMF实现的下行数据通知失败检测方法，如图3所示，该下行数据通知失败检测方法包括：
S300：SMF向AMF发送DDN信息，DDN信息用于AMF产生DDN失败报告。
在本发明实施例中，该DDN信息包括DDN指示，用于表明N1N2消息传输请求是根据DDN消息所触发的；或该DDN信息包括DDN失败报告；即SMF可以直接向AMF发送DDN失败报告，也可以通过DDN指示，使得AMF自身判定DDN失败，生成DDN失败报告。
其中SMF向AMF发送DDN指示具体包括，SMF向AMF发送N1N2消息传输请求，N1N2消息传输请求中携带DDN指示；在网络侧发起的服务请求流程中，当SMF收到UPF的下行数据通知请求时，SMF向AMF发送N1N2消息传输请求，并在N1N2消息传输请求中携带DDN指示。AMF从N1N2消息传输请求中获得DDN指示，该DDN指示的目的，是让AMF知道该N1N2消息传输请求是由SMF收到DDN消息触发的；从而，在判断UE不可及、寻呼UE失败时，AMF可断定下行数据通知流程的失败，从而AMF可产生DDN失败报告。
当SMF向AMF发送DDN失败报告分为以下两种情况：
情况一：SMF接收AMF发送的N1N2消息传输响应，N1N2消息传输响应中携带汇报DDN失败指示；SMF在下行数据通知流程失败时，向AMF发送DDN失败报告。即SMF向AMF发送N1N2消息传输请求，在消息中携带相关技术中的信息，例如N1会话容器、N2会话信息、携带N3隧道信息、寻呼策略指示等，AMF并不知道N1N2消息传输请求是根据什么消息触发；AMF向SMF返回携带汇报DDN失败指示的N1N2消息传输响应，用于表明AMF希望SMF在DDN失败时向AMF发送DDN失败报告，进而SMF判定当前DDN流程失败时，SMF产生DDN失败报告，并将该DDN失败报告发送给AMF。
情况二：SMF接收AMF发送的事件订阅请求，该事件订阅请求中事件类型为DDN失败；SMF在检测DDN失败时，向AMF发送DDN失败报告。即AMF直接向SMF订阅DDN失败事件，当SMF判定当前DDN流程失败时，SMF产生DDN失败报告，并将该DDN失败报告发送给AMF；AMF向SMF发起事件订阅请求可以是当AMF收到其他NF(如UDM、NEF)对DDN失败事件的订阅后，可对SMF发起事件订阅；AMF也可以是在PDU会话建立时，根据需要对SMF发起事件订阅；其中与情况一不同，AMF在向SMF返回N1N2消息传输响应时，并没有携带汇报DDN失败指示。
在本发明实施例中，不论情况一还是情况二，SMF可以直接将产生的DDN失败报告直接发给AMF，也可以是SMF向AMF发送事件报告(Event Report)，其中包含DDN失败报告，进而AMF根据该事件报告，产生DDN失败报告，其中AMF产生的DDN失败报告可以是SMF产生的DDN失败报告相同，也可以不同。
本发明实施例提供的下行数据通知失败检测方法，由AMF向SMF发起事件订阅，订阅事件为下行数据通知失败，进而当SMF检测到下行数 据通知流程失败时，向AMF报告下行数据通知失败；或SMF向AMF发送N1N2消息传输请求，并在N1N2消息传输请求中携带DDN指示，AMF在N1N2消息投递失败时根据DDN指示判定DDN失败，生成DDN失败报告；通过本发明实施例提供的下行数据通知失败检测方式，可以使AMF获得DDN失败信息，并据此生成下行数据失败报告。
为了便于理解，本发明实施例以一个较为具体的例子对下行数据通知失败检测方法进行说明，在网络侧触发的服务请求流程中，当SMF向AMF发送N1N2消息时，携带DDN指示，AMF在N1N2消息投递失败时判定DDN失败，生成DDN失败报告，具体如图4所示，该下行数据通知失败检测方法包括：
S401、UPF收到下行数据。如果UPF检测到没有N3隧道信息，即UPF和AN间承载已释放，则UPF向SMF触发下行数据通知流程。
S402a，UPF向SMF发送下行数据通知(DDN)消息。
S402b，SMF向UPF返回下行数据通知响应(DDN ACK)消息。
S402c，如果SMF指示过UPF将下行数据缓存到SMF，则UPF将下行数据发送到SMF。
S403a，SMF向AMF发送N1N2消息传输请求。
在N1N2消息传输请求消息中，SMF携带DDN指示(DDN Indication)，用于表明N1N2消息传输请求是根据DDN消息所触发的。
S403b，AMF向SMF返回N1N2消息传输响应。
如果UE在CM-IDLE状态，并且AMF能够寻呼UE，则AMF立即向SMF返回N1N2消息传输响应，并指示原因(Cause)值为“尝试寻呼UE”(Attempting to reach UE)。
如果UE在CM-IDLE状态，并且AMF判断UE不可及，则AMF向SMF返回N1N2消息传输响应，并指示原因(Cause)值为“UE不可及”(Unable to reach UE)。
如果UE在CM-CONNECTED状态，则AMF立即向SMF返回N1N2消息传输响应，并指示原因(Cause)值为“N1/N2传输成功”(N1/N2 transfer success)。
S403c，如果在S403b步骤中UE不可及，则AMF产生下行数据通知失败报告。
AMF根据步骤S403a中的DDN指示、以及步骤S303b中的UE不可及状态，判断SMF上的下行数据通知流程将失败，从而产生下行数据通知失败报告。
S403d，如果SMF从AMF处获知UE不可及，则SMF向UPF返回失败通知。
S404a，如果UE在CM-CONNECTED状态，则AMF触发PDU会话恢复流程；
S404b，如果UE在CM-IDLE状态，则AMF向UE发送寻呼消息；
S405a，如果AMF寻呼UE失败，则AMF向SMF发送N1N2传输失败通知(N1N2 Transfer Failure Notification)消息；
S405b，如果AMF寻呼UE失败，则AMF产生下行数据通知失败报告。
AMF根据步骤S403a中的DDN指示、以及步骤S404a～S404b中的寻呼失败情况，判断SMF上的下行数据通知流程将失败，从而产生下行数据通知失败报告。
S405c，当SMF收到S405a步骤的N1N2传输失败通知后，向UPF 发送失败通知；
S406，如果UE收到寻呼消息，则UE发起服务请求(Service Request)流程；
通过Service Request流程，恢复PDU会话、N3隧道，则UPF可以通过N3隧道直接向RAN发送下行数据。
S407，UPF向RAN发送下行数据，RAN将下行数据发送给UE。
本发明实施例提供一种下行数据通知失败检测方法，由AMF根据SMF发送N1N2消息中携带DDN指示，以及UE不可及状态、寻呼失败，来判断当前DDN流程失败，进而获知DDN流程失败信息，主动产生DDN失败报告。
本发明实施例以一个较为具体的例子对下行数据通知失败检测方法进行说明，在SMF向AMF发送N1N2消息传输请求时，AMF通过N1N2消息传输响应，隐式地订阅DDN失败报告，SMF在检测到DDN失败时向AMF发送DDN失败报告，具体如图5所示，该下行数据通知失败检测方法包括：
S501、UPF收到下行数据。
S502a，UPF向SMF发送DDN消息.
S502b，SMF向UPF返回DDN ACK消息。
S502c，UPF将下行数据发送到SMF。
S503a，SMF向AMF发送N1N2消息传输请求。
S503b，AMF向SMF返回N1N2消息传输响应，并根据UE的CM状态、UE可及性，填写合适的原因值(Cause)。
在N1N2消息传输响应消息中，AMF携带汇报DDN失败指示(Report  DDN Failure Indication)，用于表明AMF希望SMF在DDN失败时向AMF发送DDN失败报告。
S503c，如果SMF从AMF处获知UE不可及，则SMF向UPF返回失败通知；
S504a，SMF判断当前DDN流程失败；
SMF可根据AMF在N1N2消息传输响应(N1N2MessageTransfer Response)中所指示的原因值(Cause)，如：UE不可及、寻呼失败，来判断当前DDN流程失败。
S504b，SMF产生DDN失败报告，即下行数据通知失败报告，并将该DDN失败报告发送给AMF；
其中SMF向AMF发送DDN失败报告，可以是SMF直接向AMF发送DDN失败报告消息；或，SMF向AMF发送事件报告(Event Report)，其中包含DDN失败报告。
S505a，如果UE在CM-CONNECTED状态，则AMF触发PDU会话恢复流程；
S505b，如果UE在CM-IDLE状态，则AMF向UE发送寻呼消息；
S506a，如果AMF寻呼UE失败，则AMF向SMF发送N1N2传输失败通知消息；
S506b，当SMF收到S305a步骤的N1N2传输失败通知后，向UPF发送失败通知；
S507a，SMF判断当前DDN流程失败；
SMF可根据AMF发送的N1N2传输失败通知，来判断当前DDN流程失败。
S507b，SMF产生DDN失败报告，即下行数据通知失败报告，并将 该DDN失败报告发送给AMF。
S508，如果UE收到寻呼消息，则UE发起服务请求(Service Request)流程；
S509，UPF向RAN发送下行数据，RAN将下行数据发送给UE。
本发明实施例提供一种下行数据通知失败检测方法，AMF向AMF发送N1N2消息传输响应时携带汇报DDN失败指示，表明AMF希望SMF在DDN失败时向AMF发送DDN失败报告，进而SMF在根据UE不可及状态、寻呼失败，来判断当前DDN流程失败，进而产生DDN失败报告，并将DDN失败报告发送给AMF。
本发明实施例以一个较为具体的例子对下行数据通知失败检测方法进行说明，AMF向SMF显式地订阅下行数据通知失败事件，当SMF检测到下行数据通知失败时，向AMF发送下行数据通知失败报告，具体如图6所示，该下行数据通知失败检测方法包括：
S600a、AMF向SMF发送事件订阅请求(Event Subscribe Request)，指明事件类型为DDN失败(DDN Failure)。
当AMF收到其他NF(如UDM、NEF)对DDN失败事件的订阅后，可对SMF发起事件订阅。AMF也可在PDU会话建立时，根据需要对SMF发起事件订阅。
S600b、SMF接受AMF的事件订阅请求，返回事件订阅响应(Event Subscribe Response)。
S601、UPF收到下行数据。
S602a，UPF向SMF发送DDN消息.
S602b，SMF向UPF返回DDN ACK消息。
S602c，UPF将下行数据发送到SMF。
S603a，SMF向AMF发送N1N2消息传输请求。
S603b，AMF向SMF返回N1N2消息传输响应，并根据UE的CM状态、UE可及性，填写合适的原因值(Cause)。
S603c，如果SMF从AMF处获知UE不可及，则SMF向UPF返回失败通知；
S604a，SMF判断当前DDN流程失败；
S604b，SMF产生DDN失败报告，即下行数据通知失败报告，并将该DDN失败报告发送给AMF；
其中SMF向AMF发送DDN失败报告，可以是SMF直接向AMF发送DDN失败报告消息；或，SMF向AMF发送事件报告(Event Report)，其中包含DDN失败报告。
S605a，如果UE在CM-CONNECTED状态，则AMF触发PDU会话恢复流程；
S605b，如果UE在CM-IDLE状态，则AMF向UE发送寻呼消息；
S606a，如果AMF寻呼UE失败，则AMF向SMF发送N1N2传输失败通知消息；
S606b，当SMF收到S305a步骤的N1N2传输失败通知后，向UPF发送失败通知；
S607a，SMF判断当前DDN流程失败；
SMF可根据AMF发送的N1N2传输失败通知，来判断当情DDN流程失败。
S607b，SMF产生DDN失败报告，即下行数据通知失败报告，并将该DDN失败报告发送给AMF。
S608，如果UE收到寻呼消息，则UE发起服务请求(Service Request)流程；
S609，UPF向RAN发送下行数据，RAN将下行数据发送给UE。
本发明实施例提供一种下行数据通知失败检测方法，AMF向SMF发送事件订阅请求并指明事件类型为DDN失败，当SMF在根据UE不可及状态、寻呼失败，来判断当前DDN流程失败，进而产生DDN失败报告，并将DDN失败报告发送给AMF。
本发明实施例提供了一种AMF，如图7所示，包括第一处理器701、第一存储器702和第一通信总线703；
第一通信总线703设置为实现第一处理器701和第一存储器702之间的连接通信；
第一处理器701设置为执行第一存储器702中存储的一个或者多个程序，以实现上述实施例中AMF实现的下行数据通知失败检测方法的步骤。
本发明实施例提供了一种SMF，如图8所示，包括第二处理器801、第二存储器802和第二通信总线803；
第二通信总线803设置为实现第二处理器801和第二存储器802之间的连接通信；
第二处理器801设置为执行第二存储器802中存储的一个或者多个程序，以实现上述实施例中SMF实现的下行数据通知失败检测方法的步骤。
本发明实施例还提供了一种存储介质，该存储介质中存储有一个或者多个程序，一个或者多个程序可被一个或者多个处理器执行，以实现上述 实施例的AMF实现的下行数据通知失败检测方法的步骤，和/或以实现上述实施例的SMF实现的下行数据通知失败检测方法的步骤，和/或以实现上述实施例的AMF、SMF实现的下行数据通知失败检测方法的步骤。
该存储介质包括在用于存储信息(诸如计算机可读指令、数据结构、计算机程序模块或其他数据)的任何方法或技术中实施的易失性或非易失性、可移除或不可移除的介质。存储介质包括但不限于RAM(Random Access Memory，随机存取存储器),ROM(Read-Only Memory，只读存储器),EEPROM(Electrically Erasable Programmable read only memory，带电可擦可编程只读存储器)、闪存或其他存储器技术、CD-ROM(Compact Disc Read-Only Memory，光盘只读存储器)，数字多功能盘(DVD)或其他光盘存储、磁盒、磁带、磁盘存储或其他磁存储装置、或者可以用于存储期望的信息并且可以被计算机访问的任何其他的介质。
可见，本领域的技术人员应该明白，上文中所公开方法中的全部或某些步骤、系统、装置中的功能模块/单元可以被实施为软件(可以用计算装置可执行的计算机程序代码来实现)、固件、硬件及其适当的组合。在硬件实施方式中，在以上描述中提及的功能模块/单元之间的划分不一定对应于物理组件的划分；例如，一个物理组件可以具有多个功能，或者一个功能或步骤可以由若干物理组件合作执行。某些物理组件或所有物理组件可以被实施为由处理器，如中央处理器、数字信号处理器或微处理器执行的软件，或者被实施为硬件，或者被实施为集成电路，如专用集成电路。
此外，本领域普通技术人员公知的是，通信介质通常包含计算机可读指令、数据结构、计算机程序模块或者诸如载波或其他传输机制之类的调制数据信号中的其他数据，并且可包括任何信息递送介质。所以，本发明不限制于任何特定的硬件和软件结合。
以上内容是结合具体的实施方式对本发明实施例所作的进一步详细说明，不能认定本发明的具体实施只局限于这些说明。对于本发明所属技术领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干简单推演或替换，都应当视为属于本发明的保护范围。

Claims (18)

  1. 一种下行数据通知失败检测方法，包括：
    接入管理功能AMF获取下行数据通知DDN信息；
    所述AMF根据所述DDN信息产生DDN失败报告。
  2. 如权利要求1所述的下行数据通知失败检测方法，其中，所述DDN信息包括DDN指示DDN Indication。
  3. 如权利要求2所述的下行数据通知失败检测方法，其中，所述AMF获取DDN信息，包括：
    所述AMF接收会话管理功能SMF发送的携带所述DDN指示的N1N2消息传输请求。
  4. 如权利要求3所述的下行数据通知失败检测方法，其中，所述AMF根据所述DDN信息产生DDN失败报告，包括：
    基于所述DDN指示，所述AMF确定所述N1N2消息传输请求是根据DDN消息所触发；
    在UE为不可及状态或所述AMF寻呼UE失败时，所述AMF产生DDN失败报告。
  5. 如权利要求1所述的下行数据通知失败检测方法，其中，所述DDN信息包括：DDN失败报告。
  6. 如权利要求5所述的下行数据通知失败检测方法，其中，所述AMF获取DDN信息，包括：
    所述AMF接收SMF发送的N1N2消息传输请求；
    所述AMF向所述SMF发送携带汇报DDN失败指示的N1N2消息传输响应，所述汇报DDN失败指示，用于指示所述SMF在DDN失败时向所述AMF发送DDN失败报告；
    所述AMF接收所述SMF在DDN失败时发送的DDN失败报告。
  7. 如权利要求1所述的下行数据通知失败检测方法，其中，所述AMF获取DDN信息，包括：
    所述AMF向SMF发送事件订阅请求，所述事件订阅请求中事件类型为DDN失败；
    所述AMF接收所述SMF在检测到DDN失败时发送的所述DDN失败报告。
  8. 如权利要求6或7所述的下行数据通知失败检测方法，其中，所述AMF接收所述SMF发送的所述DDN失败报告，包括：
    所述AMF接收所述SMF发送的事件报告Event Report，所述事件报告中携带所述DDN失败报告。
  9. 一种下行数据通知失败检测方法，包括：
    SMF向AMF发送DDN信息，所述DDN信息用于所述AMF产生DDN失败报告。
  10. 如权利要求9所述的下行数据通知失败检测方法，其中，所述DDN信息包括：DDN指示。
  11. 如权利要求10所述的下行数据通知失败检测方法，其中，所述SMF向AMF发送DDN信息包括：
    所述SMF向所述AMF发送携带所述DDN指示的N1N2消息传输请求。
  12. 如权利要求9所述的下行数据通知失败检测方法，其中，所述DDN信息包括：DDN失败报告。
  13. 如权利要求12所述的下行数据通知失败检测方法，其中，所述SMF向AMF发送DDN信息包括：
    所述SMF接收所述AMF发送的携带汇报DDN失败指示的N1N2消 息传输响应，所述汇报DDN失败指示，用于指示所述SMF在下行数据通知流程失败时向所述AMF发送所述DDN失败报告；
    所述SMF在DDN失败时，向所述AMF发送DDN失败报告。
  14. 如权利要求9所述的下行数据通知失败检测方法，其中，所述SMF向所述AMF发送DDN信息包括：
    所述SMF接收所述AMF发送的事件订阅请求，所述事件订阅请求中事件类型为DDN失败；
    所述SMF在检测DDN失败时，向所述AMF发送DDN失败报告。
  15. 如权利要求13或14所述的下行数据通知失败检测方法，其中，所述SMF向所述AMF发送DDN失败报告，包括：
    所述SMF向AMF发送事件报告，所述事件报告中携带所述DDN失败报告。
  16. 一种AMF，所述AMF包括第一处理器、第一存储器和第一通信总线；
    所述第一通信总线设置为实现所述第一处理器和第一存储器之间的连接通信；
    所述第一处理器设置为执行所述第一存储器中存储的一个或者多个程序，以实现如权利要求1至8任一项所述下行数据通知失败检测方法的步骤。
  17. 一种SMF，所述SMF包括第二处理器、第二存储器和第二通信总线；
    所述第二通信总线设置为实现所述第二处理器和第二存储器之间的连接通信；
    所述第二处理器设置为执行所述第二存储器中存储的一个或者多个 程序，以实现如权利要求9至15任一项所述下行数据通知失败检测方法的步骤。
  18. 一种存储介质，所述存储介质存储有一个或者多个程序，所述一个或者多个程序可被一个或者多个处理器执行，以实现如权利要求1至8中任一项所述的下行数据通知失败检测方法的步骤，和/或以实现如权利要求9至15中任一项所述的下行数据通知失败检测方法的步骤。
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021136651A1 (en) * 2019-12-31 2021-07-08 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for terminal device availability management

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103841547A (zh) * 2012-11-27 2014-06-04 电信科学技术研究院 一种下行数据传输方法、装置及系统
US9948646B1 (en) * 2016-07-08 2018-04-17 Syniverse Technologies, Llc Machine type communication interworking function proxy
US20180367998A1 (en) * 2017-06-16 2018-12-20 Motorola Mobility Llc Reporting monitored parameter information
CN109891962A (zh) * 2017-06-15 2019-06-14 Lg电子株式会社 用于响应请求的方法和网络设备
CN109951824A (zh) * 2018-04-09 2019-06-28 华为技术有限公司 通信方法及装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103841547A (zh) * 2012-11-27 2014-06-04 电信科学技术研究院 一种下行数据传输方法、装置及系统
US9948646B1 (en) * 2016-07-08 2018-04-17 Syniverse Technologies, Llc Machine type communication interworking function proxy
CN109891962A (zh) * 2017-06-15 2019-06-14 Lg电子株式会社 用于响应请求的方法和网络设备
US20180367998A1 (en) * 2017-06-16 2018-12-20 Motorola Mobility Llc Reporting monitored parameter information
CN109951824A (zh) * 2018-04-09 2019-06-28 华为技术有限公司 通信方法及装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021136651A1 (en) * 2019-12-31 2021-07-08 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for terminal device availability management

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