CN111436162B - Processing method and equipment - Google Patents

Processing method and equipment Download PDF

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Publication number
CN111436162B
CN111436162B CN201910035908.9A CN201910035908A CN111436162B CN 111436162 B CN111436162 B CN 111436162B CN 201910035908 A CN201910035908 A CN 201910035908A CN 111436162 B CN111436162 B CN 111436162B
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China
Prior art keywords
pdu session
smf
amf
terminal
service
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CN111436162A (en
Inventor
李爱华
黄震宁
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China Mobile Communications Group Co Ltd
China Mobile Communications Ltd Research Institute
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China Mobile Communications Group Co Ltd
China Mobile Communications Ltd Research Institute
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/11—Allocation or use of connection identifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/19—Connection re-establishment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/25—Maintenance of established connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/30—Connection release

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The embodiment of the invention provides a processing method and equipment, wherein the method comprises the following steps: when the SMF fails to select the UPF, or when the AMF fails to select the SMF, the PDU session is processed accordingly. In the embodiment of the invention, when the SMF fails to select the UPF or the AMF fails to select the SMF, the PDU session is correspondingly processed, which comprises the following steps: reestablishing PDU session, maintaining PDU session, releasing PDU session, avoiding service failure of terminal related PDU session for a long time.

Description

Processing method and equipment
Technical Field
The embodiment of the invention relates to the technical field of communication, in particular to a processing method and processing equipment.
Background
Existing release 15 (R15) release fifth generation communication technology (5 th In the generation, 5G), in the Service Request initiated by the terminal, the N2 interface-based cross-NG-RAN handover (Inter NG-RAN node N2based handover) and other flows, the session management function (Session Management Function, SMF) needs to determine the location information of the terminal, if the terminal moves out of the Service area of the original user plane function (User Plane Function, UPF), and at the same time, the original UPF still needs to be used as the anchor point of the protocol data unit (Protocol Data Unit, PDU) session, the SMF will select a new intermediate UPF (I-UPF) for access. After successful I-UPF selection, the terminal traffic will be routed to the original UPF through the next generation radio access network (Next Generation Radio Access Network, NG RAN) and the I-UPF. However, in the above procedure, if the SMF fails to select the I-UPF, the terminal-related PDU session will fail for a longer time; similarly, for accessAnd a scenario where the mobility management function (Access and Mobility Management Function, AMF) selects an intermediate SMF (I-SMF), the terminal-related PDU session will also experience a longer service failure if the AMF fails to select an I-SMF.
For the above reasons, there is a need for a method for handling the failure of SMF selection I-UPF or failure of AMF selection I-SMF in a handover procedure.
Disclosure of Invention
The embodiment of the invention provides a processing method and equipment, which solve the problem that a service failure occurs for a long time in a terminal-related PDU session when SMF selection I-UPF fails or AMF selection I-SMF fails in a switching process.
According to a first aspect of an embodiment of the present invention, there is provided a processing method applied to a session management function SMF, the method including:
when the SMF fails to select the user plane function UPF, the protocol data unit PDU session is correspondingly processed;
wherein the corresponding processing includes any one of:
reconstructing the PDU session;
maintaining a PDU session;
the PDU session is released.
Optionally, the reconstructing the PDU session includes:
and sending first information to the terminal, wherein the first information carries a cause value, and the cause value is used for indicating the terminal to reestablish the PDU session.
Optionally, the sending the first information to the terminal includes:
invoking a first service first operation of the AMF;
the first service is an AMF communication service, the first operation is an N1N2 interface message transmission operation, and the N1N2 interface message transmission operation is used for sending the first information to a terminal.
Optionally, the first information further carries a PDU session identifier.
Optionally, after the maintaining the PDU session, the method further comprises:
the establishment request for the user plane connection in the PDU session is denied.
Optionally, after the releasing the PDU session, the method further comprises:
and notifying AMF that the PDU session is released.
According to a second aspect of an embodiment of the present invention, there is provided a processing method applied to an AMF, the method including:
when AMF fails to select SMF, the PDU session is processed correspondingly;
wherein the corresponding processing includes any one of:
reconstructing the PDU session;
maintaining a PDU session;
the PDU session is released.
Optionally, the reconstructing the PDU session includes:
the SMF is notified to release the PDU session.
Optionally, the reconstructing the PDU session further comprises:
and receiving a first operation of the SMF calling the first service of the AMF, wherein the first service is the AMF communication service, the first operation is an N1N2 interface message transmission operation, the N1N2 interface message transmission operation is used for sending the first information to the terminal, the first information carries a cause value, and the original value is used for indicating the terminal to reestablish the PDU session.
Optionally, the first information further carries a PDU session identifier.
Optionally, the releasing the PDU session includes:
and notifying the terminal and/or the SMF to release the PDU session.
According to a third aspect of an embodiment of the present invention, there is provided a processing method applied to SMF, the method including:
and when the AMF fails to select the SMF, receiving a first message sent by the AMF, wherein the first message is used for indicating the SMF to release the PDU session.
Optionally, after the receiving the first message sent by the AMF, the method further includes:
and notifying AMF that the PDU session is released.
Optionally, after the receiving the first message sent by the AMF, the method further includes:
and sending first information to the terminal, wherein the first information carries a cause value, and the cause value is used for indicating the terminal to reestablish the PDU session.
Optionally, the sending the first information to the terminal includes:
invoking a first service first operation of the AMF;
the first service is an AMF communication service, the first operation is an N1N2 interface message transmission operation, and the N1N2 interface message transmission operation is used for sending the first information to a terminal.
Optionally, the first information further carries a PDU session identifier.
According to a fourth aspect of the embodiment of the present invention, there is provided a processing method, applied to a terminal, the method including:
receiving first information sent by an SMF, wherein the first information carries a cause value, and the cause value is used for indicating the terminal to reestablish a PDU session;
and reconstructing the PDU session according to the first information.
Optionally, the first information further carries a PDU session identifier.
According to a fifth aspect of an embodiment of the present invention, there is provided an SMF comprising: a first transceiver and a first processor, wherein,
the first processor is configured to perform corresponding processing on the PDU session when the SMF fails to select the UPF;
wherein the corresponding processing includes any one of:
reconstructing the PDU session;
maintaining a PDU session;
the PDU session is released.
Optionally, the first transceiver is configured to send first information to a terminal, where the first information carries a cause value, and the cause value is used to instruct the terminal to reestablish a PDU session.
Optionally, the first processor is further configured to invoke a first service first operation of the AMF;
the first service is an AMF communication service, the first operation is an N1N2 interface message transmission operation, and the N1N2 interface message transmission operation is used for sending the first information to a terminal.
Optionally, the first information further carries a PDU session identifier.
Optionally, the first processor is further configured to reject an establishment request for a user plane connection in a PDU session.
Optionally, the first transceiver is further configured to notify an AMF that the PDU session is released.
According to a sixth aspect of an embodiment of the present invention, there is provided an AMF comprising: a second transceiver and a second processor, wherein,
the second processor is configured to perform corresponding processing on the PDU session when the SMF fails to select the UPF or the AMF fails to select the SMF;
wherein the corresponding processing includes any one of:
reconstructing the PDU session;
maintaining a PDU session;
the PDU session is released.
Optionally, the second transceiver is further configured to notify the SMF to release the PDU session;
optionally, the second processor is further configured to accept a first operation of the SMF calling the first service of the AMF, where the first service is an AMF communication service, the first operation is an N1N2 interface messaging operation, and the N1N2 interface messaging operation is used to send the first information to the terminal.
Optionally, the second transceiver is further configured to notify the terminal and/or the SMF to release the PDU session.
According to a seventh aspect of an embodiment of the present invention, there is provided an SMF comprising: a third transceiver, and a third processor, wherein,
the third transceiver is configured to receive a first message sent by the AMF when the AMF fails to select the SMF, where the first message is used to instruct the SMF to release the PDU session.
Optionally, the third transceiver is configured to notify AMF that the PDU session has been released
Optionally, the third transceiver is further configured to send first information to a terminal, where the first information carries a cause value, and the cause value is used to instruct the terminal to reestablish a PDU session.
Optionally, the third processor is further configured to invoke a first service first operation of the AMF;
the first service is an AMF communication service, the first operation is an N1N2 interface message transmission operation, the N1N2 interface message transmission operation is used for sending the first information to a terminal, the first information carries a cause value, and the cause value is used for indicating the terminal to reestablish a PDU session.
Optionally, the first information further carries a PDU session identifier.
According to an eighth aspect of an embodiment of the present invention, there is provided a terminal including: a fourth transceiver, and a fourth processor, wherein,
the fourth transceiver is configured to receive first information sent by the SMF, where the first information carries a cause value, and the cause value is used to instruct the terminal to reestablish a PDU session;
the fourth processor is configured to reconstruct a PDU session according to the first information.
Optionally, the first information further carries a PDU session identifier.
According to a ninth aspect of an embodiment of the present invention, there is provided a communication device including a processor, a memory, and a program stored on the memory and executable on the processor, the program implementing the steps of the processing method according to the first aspect, or the steps of the processing method according to the second aspect, or the steps of the processing method according to the third aspect, or the steps of the processing method according to the fourth aspect, when executed by the processor.
According to a tenth aspect of embodiments of the present invention, there is provided a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the processing method according to the first aspect, or the steps of the processing method according to the second aspect, or the steps of the processing method according to the third aspect, or the steps of the processing method according to the fourth aspect.
In the embodiment of the invention, when the SMF fails to select the UPF or the AMF fails to select the SMF, the PDU session is correspondingly processed, which comprises the following steps: reestablishing PDU session, maintaining PDU session, releasing PDU session, avoiding service failure of terminal related PDU session for a long time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic flow chart of a processing method according to an embodiment of the present invention;
FIG. 2 is a second flow chart of a processing method according to an embodiment of the invention;
FIG. 3 is a third flow chart of a processing method according to an embodiment of the invention;
FIG. 4 is a flow chart of a processing method according to an embodiment of the present invention;
FIG. 5 is a flowchart of a processing method according to an embodiment of the present invention;
FIG. 6 is a flowchart illustrating a processing method according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of an SMF entity according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of an AMF entity according to an embodiment of the invention;
fig. 9 is a second schematic structural diagram of an SMF entity according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of a terminal according to an embodiment of the present invention;
fig. 11 is a schematic structural diagram of a communication device according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, an embodiment of the present invention provides a processing method, where an execution body of the method is an SMF entity, and the method specifically includes the following steps:
step 101: when the SMF fails to select UPF, the PDU session is processed accordingly.
In the embodiment of the invention, when the SMF fails to select the I-UPF, the PDU session is correspondingly processed.
The embodiment of the invention provides the following processing method:
(1) Reconstructing the PDU session;
in the embodiment of the invention, when the SMF fails to select the UPF, the SMF sends first information to the terminal, wherein the first information carries a reason value, and the reason value is used for indicating the terminal to reestablish the PDU session.
Specifically, the SMF invokes a first service first operation of the AMF, where the first service is an AMF Communication service, the first operation is an N1N2 interface messaging operation, and the N1N2 interface messaging operation is used to send the first information to the terminal, that is, invoke a service namf_communication_n1n2message transfer of the AMF;
optionally, the first information is N1 interface session management (N1 Session Management, N1 SM) information;
optionally, the first information further carries a PDU session identifier.
(2) Maintaining a PDU session;
in an embodiment of the present invention, when the SMF fails to select a UPF, the PDU session is maintained by the SMF.
Further, the SMF maintains the PDU session and informs the AMF, and then refuses the establishment request for the user plane connection in the PDU session, avoiding the new PDU session request establishment.
(3) Releasing the PDU session;
in an embodiment of the present invention, when the SMF fails to select a UPF, the PDU session is released by the SMF.
Further, the SMF releases the PDU session and notifies the AMF that the PDU session has been released.
In the embodiment of the invention, when the SMF selects UPF to select failure, the PDU session is correspondingly processed, including PDU session reestablishment, PDU session maintenance and PDU session release, so as to avoid service failure of the terminal related PDU session for a long time.
Referring to fig. 2, an embodiment of the present invention provides a processing method, where an execution body of the method is an AMF entity, and the method specifically includes the following steps:
step 201: when AMF fails to select SMF, PDU session is processed correspondingly.
In the embodiment of the invention, when the AMF fails to select the I-SMF, the PDU session is correspondingly processed.
The embodiment of the invention provides the following processing method:
(1) Reconstructing the PDU session;
in the embodiment of the invention, when the AMF fails to select the SMF, the AMF can firstly inform the anchor SMF to release the PDU session, and then the AMF receives a first operation of calling a first service of the AMF by the anchor SMF, wherein the first service is AMF Communication service, the first operation is N1N2 interface message transmission operation, namely, the service of calling the AMF is Namf_communication_N1N2MessageTransfere; the anchor SMF sends first information to the terminal through the first operation of the first service, wherein the first information carries a reason value which is used for indicating the terminal to reestablish the PDU session.
Optionally, the first information is N1SM information;
optionally, the first information further carries a PDU session identifier.
(2) Maintaining a PDU session;
in an embodiment of the present invention, when the AMF fails to select an SMF, the PDU session is maintained by the AMF.
(3) Releasing the PDU session;
in the embodiment of the invention, when the AMF fails to select the SMF, the AMF informs the terminal and/or the SMF to release the PDU session.
In the embodiment of the invention, when AMF selection fails, PDU session is correspondingly processed, including PDU session reestablishment, PDU session maintenance and PDU session release, so as to avoid service failure of the terminal related PDU session for a long time.
Referring to fig. 3, an embodiment of the present invention provides a processing method, where an execution body of the method is SMF, and the method includes the following specific steps:
step 301: when the AMF fails to select the SMF, a first message sent by the AMF is received;
in an embodiment of the present invention, the first message is used to instruct the SMF to release the PDU session.
Optionally, after step 301, the SMF informs the AMF that the PDU session has been released.
Optionally, after step 301, the SMF sends first information to the terminal, where the first information carries a cause value, where the cause value is used to instruct the terminal to reestablish the PDU session.
Specifically, the SMF invokes a first service first operation of the AMF, where the first service is an AMF Communication service, the first operation is an N1N2 interface messaging operation, and the N1N2 interface messaging operation is used to send the first information to the terminal, that is, invoke a service namf_communication_n1n2message transfer of the AMF;
optionally, the first information is N1 interface session management (N1 Session Management, N1 SM) information;
optionally, the first information further carries a PDU session identifier.
Referring to fig. 4, an embodiment of the present invention provides a processing method, where an execution body of the method is a terminal, and specific steps of the method are as follows:
step 401: receiving first information sent by SMF;
step 402: and reconstructing the PDU session according to the first information.
In the embodiment of the present invention, the first information carries a cause value, where the cause value is used to instruct the terminal to reestablish the PDU session.
Optionally, the first information is N1SM information.
Optionally, the first information carries a PDU session identifier.
Referring to fig. 5, in the service request flow initiated by the terminal, in step 5b, when the SMF needs to determine the location information of the terminal, if the terminal moves out of the service area of the original UPF, and the original UPF still needs to be used as an anchor point of the PDU session, the SMF selects a new UPF (I-UPF) access. At this time, if the SMF fails to select the UPF, the SMF may have any of the following processing schemes according to a local or operator policy:
(1) The SMF calls Namf_communication_N1N2MessageTransferof AMF, N1SM information is sent to the terminal, PDU session identification and a reason value are carried in the N1SM information, wherein the reason value indicates that the terminal needs to reestablish the PDU session corresponding to the PDU session identification. Specifically, as shown in step S1 in fig. 5.
(2) The SMF maintains the PDU session, informs the AMF, refuses the establishment request of the user interface connection of the PDU session;
(3) The SMF releases the PDU session and informs the AMF that the PDU session has been released.
With continued reference to fig. 5, in the flow of the terminal Triggered Service Request, in step 4, when the AMF needs to determine the location information of the terminal, if the terminal moves out of the service area of the original SMF, the AMF selects a new SMF (I-SMF) access. At this time, if the AMF fails to select the SMF, the AMF may have any one of the following processing schemes according to a local or operator policy:
(1) The AMF informs the SMF to release the PDU session, the SMF calls the Namf_communication_N1N2Messagetransfer of the AMF, N1SM information is sent to the terminal, the N1SM information carries a PDU session identifier and a reason value, and the reason value indicates that the terminal needs to reestablish the PDU session corresponding to the PDU session identifier.
(2) AMF maintains the PDU session;
(3) The AMF informs the terminal and the SMF to release the PDU session.
Referring to fig. 6, in a cross NG-RAN handover (Inter NG-RAN node N2based handover) procedure based on the N2 interface, in step 5 of the preparation phase (Preparation phase), when the SMF determines that the terminal moves out of the service area of the original UPF, the SMF will select a new UPF (I-UPF) access. At this time, if the SMF fails to select the UPF, the SMF may have any of the following processing schemes according to a local or operator policy:
(1) The SMF calls Namf_communication_N1N2MessageTransferof AMF, N1SM information is sent to the terminal, PDU session identification and a reason value are carried in the N1SM information, wherein the reason value indicates that the terminal needs to reestablish the PDU session corresponding to the PDU session identification. Specifically, as shown in step S2 in fig. 5.
(2) The SMF maintains the PDU session, informs the AMF, refuses the establishment request of the user interface connection of the PDU session;
(3) The SMF releases the PDU session and informs the AMF that the PDU session has been released.
With continued reference to fig. 6, in the Inter NG-RAN node N2based handover procedure, in step 4 of Preparation phase, when the AMF determines that the terminal has moved out of the service area of the original SMF, the AMF will select a new SMF access. At this time, if the AMF fails to select the SMF, the AMF may have any one of the following processing schemes according to a local or operator policy:
(1) The AMF informs the SMF to release the PDU session, the SMF calls the Namf_communication_N1N2Messagetransfer of the AMF, N1SM information is sent to the terminal, the N1SM information carries a PDU session identifier and a reason value, and the reason value indicates that the terminal needs to reestablish the PDU session corresponding to the PDU session identifier.
(2) AMF maintains the PDU session;
(3) The AMF informs the terminal and the SMF to release the PDU session.
Referring to fig. 7, an embodiment of the present invention provides an SMF 700, comprising: a first transceiver 701 and a first processor 702;
the first processor 702 is configured to perform corresponding processing on a protocol data unit PDU session when the SMF fails to select a UPF;
wherein the corresponding processing includes any one of:
reconstructing the PDU session;
maintaining a PDU session;
the PDU session is released.
Optionally, the first transceiver 701 is configured to send first information to a terminal, where the first information carries a cause value, and the cause value is used to instruct the terminal to reestablish a PDU session.
Optionally, the first processor 702 is further configured to invoke a first service first operation of the AMF;
the first service is an AMF communication service, the first operation is an N1N2 interface message transmission operation, and the N1N2 interface message transmission operation is used for sending the first information to a terminal.
Optionally, the first information further carries a PDU session identifier.
Optionally, the first processor 702 is further configured to reject an establishment request for a user plane connection in a PDU session.
Optionally, the first transceiver 701 is further configured to notify the AMF that the PDU session is released.
In the embodiment of the invention, when the SMF selects UPF to select failure, the PDU session is correspondingly processed, including PDU session reestablishment, PDU session maintenance and PDU session release, so as to avoid service failure of the terminal related PDU session for a long time.
Referring to fig. 8, an embodiment of the present invention provides an AMF 800 comprising: a second transceiver 801 and a second processor 802;
the second processor 802 is configured to perform corresponding processing on the PDU session when the AMF fails to select the SMF;
wherein the corresponding processing includes any one of:
reconstructing the PDU session;
maintaining a PDU session;
the PDU session is released.
Optionally, the second transceiver 801 is further configured to notify the SMF to release the PDU session;
optionally, the second processor 802 is further configured to accept a first operation of the SMF to invoke the first service of the AMF, where the first service is an AMF communication service, the first operation is an N1N2 interface messaging operation, the N1N2 interface messaging operation is configured to send the first information to a terminal, the first information is sent to the terminal by the SMF through the first operation of the first service, and the first information carries a cause value, where the cause value is used to instruct the terminal to reestablish the PDU session.
Optionally, the first information further carries a PDU session identifier.
Optionally, the second transceiver 801 is further configured to notify the terminal and/or the SMF to release the PDU session.
In the embodiment of the invention, when AMF selection fails, PDU session is correspondingly processed, including PDU session reestablishment, PDU session maintenance and PDU session release, so as to avoid service failure of the terminal related PDU session for a long time.
Referring to fig. 9, an embodiment of the present invention provides an SMF entity 900, including: a third transceiver 901, and a third processor 902, wherein,
the third transceiver 901 is configured to receive a first message sent by an AMF when the AMF fails to select the SMF, where the first message is used to instruct the SMF to release a PDU session.
Optionally, the third transceiver 901 is configured to notify the AMF that the PDU session has been released
Optionally, the third transceiver 901 is further configured to send first information to a terminal, where the first information carries a cause value, and the cause value is used to instruct the terminal to reestablish a PDU session.
Optionally, the third processor 902 is further configured to invoke a first service first operation of the AMF;
the first service is an AMF communication service, the first operation is an N1N2 interface message transmission operation, and the N1N2 interface message transmission operation is used for sending the first information to a terminal.
Optionally, the first information further carries a PDU session identifier.
Referring to fig. 10, an embodiment of the present invention provides a terminal 1000 including: a fourth transceiver 1001 and a fourth processor 1002;
the fourth transceiver 1001 is configured to receive first information sent by the SMF, where the first information carries a cause value, and the cause value is used to instruct the terminal to reestablish a PDU session;
the fourth processor 1002 is configured to reconstruct a PDU session according to the first information.
Optionally, the first information further carries a PDU session identifier.
Referring to fig. 11, an embodiment of the present invention provides a communication device 1100 including: a processor 1101, a transceiver 1102, a memory 1103 and a bus interface.
The processor 1101, among other things, may be responsible for managing the bus architecture and general processing. The memory 1103 may store data used by the processor 1101 in performing operations.
In an embodiment of the present invention, the communication device 1100 may further include: a program stored on the memory 1103 and executable on the processor 1101, which when executed by the processor 1101, implements the steps of the method provided by the embodiments of the present invention.
In fig. 11, a bus architecture may comprise any number of interconnecting buses and bridges, with various circuits of the one or more processors, as represented by the processor 1101, and the memory, as represented by the memory 1103, being linked together. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., all as are well known in the art and, therefore, further description of embodiments of the present invention will not be provided. The bus interface provides an interface. The transceiver 1102 may be a number of elements, i.e., including a transmitter and a receiver, providing a means for communicating with various other apparatus over a transmission medium.
The embodiment of the invention also provides a computer readable storage medium, on which a computer program is stored, which when executed by a processor, implements the processes of the above method embodiment, and can achieve the same technical effects, and in order to avoid repetition, the description is omitted here. Wherein the computer readable storage medium is selected from Read-Only Memory (ROM), random access Memory (Random Access Memory, RAM), magnetic disk or optical disk.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The embodiments of the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present invention and the scope of the claims, which are to be protected by the present invention.

Claims (32)

1. A processing method applied to a session management function SMF, the method comprising:
when the SMF fails to select the user plane function UPF, the protocol data unit PDU session is correspondingly processed;
wherein the corresponding processing includes any one of:
reconstructing the PDU session;
maintaining a PDU session;
releasing the PDU session;
the UPF is an intermediate UPF, and when the terminal moves out of a service area of an original UPF and the original UPF is used as an anchor point of a PDU session, the terminal routes to the original UPF through the intermediate UPF.
2. The method of claim 1, wherein the step of determining the position of the substrate comprises,
the reestablishing the PDU session includes:
and sending first information to the terminal, wherein the first information carries a cause value, and the cause value is used for indicating the terminal to reestablish the PDU session.
3. The method of claim 2, wherein the step of determining the position of the substrate comprises,
the sending the first information to the terminal includes:
invoking a first service first operation of the AMF;
wherein the first service is an AMF communication service, and the first operation is an N1N2 interface message transfer operation.
4. The method of claim 2, wherein the first information further carries a PDU session identification.
5. The method of claim 1, wherein the step of determining the position of the substrate comprises,
after said maintaining the PDU session, the method further comprises:
the establishment request for the user plane connection in the PDU session is denied.
6. The method of claim 1, wherein the step of determining the position of the substrate comprises,
after the releasing the PDU session, the method further comprises:
and notifying AMF that the PDU session is released.
7. A processing method applied to an AMF, the method comprising:
when AMF fails to select middle SMF, PDU session is processed correspondingly;
wherein the corresponding processing includes any one of:
reconstructing the PDU session;
maintaining a PDU session;
releasing the PDU session;
when a terminal moves out of a service area of an original SMF, the terminal routes to the original SMF through the intermediate SMF.
8. The method of claim 7, wherein the step of determining the position of the probe is performed,
the reestablishing the PDU session includes:
the SMF is notified to release the PDU session.
9. The method of claim 7, wherein the step of determining the position of the probe is performed,
the reestablishing the PDU session includes:
and receiving a first operation of the SMF calling the first service of the AMF, wherein the first service is the AMF communication service, and the first operation is an N1N2 interface message transmission operation.
10. The method of claim 7, wherein the step of determining the position of the probe is performed,
the release PDU session, comprising:
and notifying the terminal and/or the SMF to release the PDU session.
11. A method of processing applied to SMF, the method comprising:
when the AMF fails to select the intermediate SMF, receiving a first message sent by the AMF, wherein the first message is used for indicating the SMF to release the PDU session;
when a terminal moves out of a service area of an original SMF, the terminal routes to the original SMF through the intermediate SMF.
12. The method of claim 11, wherein after the receiving the first message sent by the AMF, the method further comprises:
and notifying AMF that the PDU session is released.
13. The method of claim 11, wherein after the receiving the first message sent by the AMF, the method further comprises:
and sending first information to the terminal, wherein the first information carries a cause value, and the cause value is used for indicating the terminal to reestablish the PDU session.
14. The method of claim 13, wherein the step of determining the position of the probe is performed,
the sending the first information to the terminal includes:
invoking a first service first operation of the AMF;
wherein the first service is an AMF communication service, and the first operation is an N1N2 interface message transfer operation.
15. The method of claim 14 wherein the first information further carries a PDU session identification.
16. An SMF, comprising: a first transceiver and a first processor, wherein,
the first processor is configured to perform corresponding processing on the PDU session when the SMF fails to select the UPF;
wherein the corresponding processing includes any one of:
reconstructing the PDU session;
maintaining a PDU session;
releasing the PDU session;
the UPF is an intermediate UPF, and when the terminal moves out of a service area of an original UPF and the original UPF is used as an anchor point of a PDU session, the terminal routes to the original UPF through the intermediate UPF.
17. The SMF of claim 16, wherein,
the first transceiver is configured to send first information to a terminal, where the first information carries a cause value, and the cause value is used to instruct the terminal to reestablish a PDU session.
18. The SMF of claim 17, wherein,
the first processor is further configured to invoke a first service first operation of the AMF;
wherein the first service is an AMF communication service, and the first operation is an N1N2 interface message transfer operation.
19. The SMF of claim 17, wherein,
the first information also carries PDU session identification.
20. The SMF of claim 16, wherein,
the first processor is further configured to reject an establishment request for a user plane connection in a PDU session.
21. The SMF of claim 16, wherein,
the first transceiver is further configured to notify an AMF that the PDU session has been released.
22. An AMF, comprising: a second transceiver and a second processor, wherein,
the second processor is configured to perform corresponding processing on the PDU session when the AMF fails to select the intermediate SMF;
wherein the corresponding processing includes any one of:
reconstructing the PDU session;
maintaining a PDU session;
releasing the PDU session;
when a terminal moves out of a service area of an original SMF, the terminal routes to the original SMF through the intermediate SMF.
23. The AMF as claimed in claim 22, wherein,
the second transceiver is further configured to notify the SMF to release the PDU session.
24. The AMF as claimed in claim 23, wherein,
the second processor is further configured to accept a first operation of the SMF calling a first service of the AMF, where the first service is an AMF communication service, and the first operation is an N1N2 interface message transfer operation.
25. The AMF as claimed in claim 22, wherein,
the second transceiver is further configured to notify the terminal and/or the SMF to release the PDU session.
26. An SMF, comprising: a third transceiver, and a third processor, wherein,
the third transceiver is configured to receive a first message sent by an AMF when the AMF fails to select an intermediate SMF, where the first message is used to instruct the SMF to release a PDU session;
when a terminal moves out of a service area of an original SMF, the terminal routes to the original SMF through the intermediate SMF.
27. The SMF of claim 26, wherein,
the third transceiver is configured to notify the AMF that the PDU session is released.
28. The SMF of claim 26, wherein,
the third transceiver is further configured to send first information to a terminal, where the first information carries a cause value, and the cause value is used to instruct the terminal to reestablish a PDU session.
29. The SMF of claim 28, wherein,
the third processor is further configured to invoke a first service first operation of the AMF;
wherein the first service is an AMF communication service, and the first operation is an N1N2 interface message transfer operation.
30. The SMF of claim 28 wherein said first information further carries PDU session identification.
31. A communication device comprising a processor, a memory and a program stored on the memory and executable on the processor, the program when executed by the processor implementing the steps of the processing method according to any one of claims 1 to 6, or the steps of the processing method according to any one of claims 7 to 10, or the steps of the processing method according to any one of claims 11 to 15.
32. A computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the processing method according to any one of claims 1 to 6, or the steps of the processing method according to any one of claims 7 to 10, or the steps of the processing method according to claims 11 to 15.
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