CN111436162A - Processing method and equipment - Google Patents

Processing method and equipment Download PDF

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Publication number
CN111436162A
CN111436162A CN201910035908.9A CN201910035908A CN111436162A CN 111436162 A CN111436162 A CN 111436162A CN 201910035908 A CN201910035908 A CN 201910035908A CN 111436162 A CN111436162 A CN 111436162A
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China
Prior art keywords
pdu session
smf
amf
information
terminal
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CN201910035908.9A
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CN111436162B (en
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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 selection of UPF by SMF fails or when the selection of SMF by AMF fails, PDU session is processed correspondingly. In the embodiment of the invention, when the selection of UPF by SMF fails or when the selection of SMF by AMF fails, the PDU session is processed correspondingly, which comprises the following steps: reestablishing PDU session, maintaining PDU session, releasing PDU session, avoiding long time service failure of terminal related PDU session.

Description

Processing method and equipment
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a processing method and a processing device.
Background
Existing release 15(R15) release fifth generation communication technology (5)thgeneration, 5G) in a service request (Servi) initiated at a terminalce Request), Inter NG-RAN non-2 based handover (Inter NG-RAN non-RAN 2based handover) based on N2 interface, etc., the Session Management Function (SMF) needs to judge the location information of the terminal, if the terminal moves out of the service area of the original User Plane Function (UPF) and the original UPF still needs to be the anchor point of the Protocol Data Unit (PDU) Session, the SMF will select a new intermediate UPF (I-UPF) to access. After the I-UPF is successfully selected, the terminal traffic will be routed to the original UPF through the Next Generation Radio Access Network (NG RAN) and the I-UPF. However, in the above flow, if the SMF fails to select the I-UPF, a long service failure occurs in the terminal-related PDU session; similarly, for the scenario where the Access and Mobility Management Function (AMF) selects the intermediate SMF (I-SMF), if the AMF fails to select the I-SMF, the PDU session related to the terminal will also have a long service failure.
For the above reasons, a processing method for solving the failure of selecting I-UPF by SMF or the failure of selecting I-SMF by AMF in the handover procedure is needed.
Disclosure of Invention
The embodiment of the invention provides a processing method and equipment, which solve the problem that long-time service failure occurs in terminal-related PDU conversation when SMF selection I-UPF fails or AMF selection I-SMF fails in a switching process.
According to a first aspect of the embodiments of the present invention, there is provided a processing method applied to a session management function SMF, where the method includes:
when SMF fails to select user plane function UPF, the protocol data unit PDU session is processed correspondingly;
wherein the corresponding processing includes any one of:
reconstructing a PDU session;
maintaining the PDU session;
the PDU session is released.
Optionally, the reestablishing the PDU session includes:
and sending first information to a terminal, wherein the first information carries a reason value, and the reason value is used for indicating the terminal to reestablish the PDU session.
Optionally, the sending the first information to the terminal includes:
calling a first service first operation of the AMF;
wherein 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 for sending the first information to a terminal.
Optionally, the first information further carries a PDU session identifier.
Optionally, after the maintaining of the PDU session, the method further comprises:
the establishment request for the user plane connection in the PDU session is rejected.
Optionally, after the releasing the PDU session, the method further includes:
and informing the AMF that the PDU session is released.
According to a second aspect of the embodiments of the present invention, there is provided a processing method applied to an AMF, the method including:
when the AMF fails to select the SMF, the PDU session is correspondingly processed;
wherein the corresponding processing includes any one of:
reconstructing a PDU session;
maintaining the PDU session;
the PDU session is released.
Optionally, the reestablishing the PDU session includes:
and informing the SMF to release the PDU session.
Optionally, the reestablishing the PDU session further includes:
receiving a first service first operation of an AMF called by an SMF, wherein 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 original value is used for indicating the terminal to rebuild a PDU session.
Optionally, the first information further carries a PDU session identifier.
Optionally, the releasing the PDU session includes:
and informing the terminal and/or the SMF to release the PDU session.
According to a third aspect of the embodiments of the present invention, there is provided a processing method applied to SMF, the method including:
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 informing the 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 a terminal, wherein the first information carries a reason value, and the reason value is used for indicating the terminal to reestablish the PDU session.
Optionally, the sending the first information to the terminal includes:
calling a first service first operation of the AMF;
wherein 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 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 embodiments 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 reason value, and the reason value is used for indicating the terminal to reestablish a PDU session;
and rebuilding the PDU session according to the first information.
Optionally, the first information further carries a PDU session identifier.
According to a fifth aspect of embodiments of the present invention, there is provided an SMF, comprising: a first transceiver and a first processor, wherein,
the first processor is used for correspondingly processing the PDU session when the SMF fails to select the UPF;
wherein the corresponding processing includes any one of:
reconstructing a PDU session;
maintaining the 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;
wherein 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 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 the establishment request for the user plane connection in the PDU session.
Optionally, the first transceiver is further configured to notify the AMF that the PDU session is released.
According to a sixth aspect of an embodiment of the present invention, there is provided an AMF including: a second transceiver and a second processor, wherein,
the second processor is used for correspondingly processing the PDU session when the UPF selection of the SMF fails or the AMF selection of the SMF fails;
wherein the corresponding processing includes any one of:
reconstructing a PDU session;
maintaining the 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 service first operation of the SMF invoking 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 configured 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 embodiments 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 selection of the SMF fails, where the first message is used to instruct the SMF to release the PDU session.
Optionally, the third transceiver is configured to notify the AMF that the PDU session is 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 the embodiments 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 an SMF, where the first information carries a cause value, and the cause value is used to instruct the terminal to reestablish a PDU session;
and the fourth processor is used for reestablishing the PDU session according to the first information.
Optionally, the first information further carries a PDU session identifier.
According to a ninth aspect of embodiments of the present invention, there is provided 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 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.
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 selection of UPF by SMF fails or when the selection of SMF by AMF fails, the PDU session is processed correspondingly, which comprises the following steps: reestablishing PDU session, maintaining PDU session, releasing PDU session, avoiding long time service failure of terminal related PDU session.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a schematic flow chart of a processing method according to an embodiment of the present invention;
FIG. 2 is a second flowchart of a processing method according to an embodiment of the present invention;
FIG. 3 is a third schematic flow chart of a processing method according to an embodiment of the present invention;
FIG. 4 is a fourth schematic flowchart of a processing method according to an embodiment of the present invention;
FIG. 5 is a fifth flowchart illustrating a processing method according to an embodiment of the present invention;
FIG. 6 is a sixth schematic flow chart 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 present 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 technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, an embodiment of the present invention provides a processing method, where an execution subject of the method is an SMF entity, and the method includes the following specific steps:
step 101: and when the selection of the UPF by the SMF fails, correspondingly processing the PDU session.
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 methods:
(1) reconstructing a 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 operation of a first service of the AMF, wherein the first service is an AMF Communication service, the first operation is an N1N2 interface messaging operation, and the N1N2 interface messaging operation is configured 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 (N1Session Management, N1SM) information;
optionally, the first information further carries a PDU session identifier.
(2) Maintaining the PDU session;
in the embodiment of the invention, when the SMF fails to select the UPF, the SMF maintains the PDU session.
Further, the SMF maintains the PDU session and informs the AMF, and then rejects 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 the embodiment of the invention, when the SMF fails to select the UPF, the SMF releases the PDU session.
Further, the SMF releases the PDU session and informs the AMF that the PDU session is released.
In the embodiment of the invention, when the selection of UPF by SMF fails, the PDU session is correspondingly processed, including the reconstruction of the PDU session, the maintenance of the PDU session and the release of the PDU session, thereby avoiding the long-time service failure of the terminal-related PDU session.
Referring to fig. 2, an embodiment of the present invention provides a processing method, where an execution subject of the method is an AMF entity, and the method includes the following specific steps:
step 201: when the AMF fails to select the SMF, the 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 methods:
(1) reconstructing a PDU session;
in this embodiment of the present invention, when the AMF fails to select the SMF, the AMF may first notify the anchor SMF to release the PDU session, and then the AMF accepts that the anchor SMF invokes a first service first operation of the AMF, where the first service is an AMF Communication service, and the first operation is an N1N2 interface message transfer operation, that is, the service invoking the AMF is a Namf _ Communication _ N1N2 MessageTransfer; and the anchor point SMF sends first information to the terminal through the first service first operation, wherein the first information carries a reason value, and the reason value 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 the PDU session;
in the embodiment of the invention, when the AMF fails to select the 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 the AMF selects the SMF and fails to select, the PDU session is correspondingly processed, including the reconstruction of the PDU session, the maintenance of the PDU session and the release of the PDU session, thereby avoiding the long-time service failure of the terminal related PDU session.
Referring to fig. 3, an embodiment of the present invention provides a processing method, where an execution subject of the method is an SMF, and the method includes the following specific steps:
step 301: when the AMF fails to select the SMF, receiving a first message sent by the AMF;
in the embodiment of the invention, the first message is used for indicating the SMF to release the PDU session.
Optionally, after step 301, the SMF informs the AMF that the PDU session is released.
Optionally, after step 301, the SMF sends a first message to the terminal, where the first message carries a cause value, and the cause value is used to instruct the terminal to re-establish the PDU session.
Specifically, the SMF invokes a first operation of a first service of the AMF, wherein the first service is an AMF Communication service, the first operation is an N1N2 interface messaging operation, and the N1N2 interface messaging operation is configured 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 (N1Session Management, N1SM) 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 subject of the method is a terminal, and the method includes the following specific steps:
step 401: receiving first information sent by the SMF;
step 402: and reestablishing the PDU session according to the first information.
In the embodiment of the present invention, the first information carries a cause value, and the cause value is used for instructing the terminal to reestablish the PDU session.
Optionally, the first information is N1SM information.
Optionally, the PDU session identifier is carried in the first information.
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 the anchor point of the PDU session, the SMF selects a new UPF (I-UPF) to access. At this time, if the SMF fails to select the UPF, the SMF may have any one of the following processing schemes according to the local or operator policy:
(1) the SMF calls a service Namf _ Communication _ N1N2MessageTransfer of the AMF, sends N1SM information to the terminal, and the information N1SM carries a PDU session identifier and a reason value, wherein the reason value indicates that the terminal needs to rebuild the PDU session corresponding to the PDU session identifier. As shown in particular in step S1 in fig. 5.
(2) SMF keeps the PDU conversation, informs AMF, refuses the establishment request of the user interface connection of the PDU conversation;
(3) the SMF releases the PDU session and informs the AMF that the PDU session has been released.
Continuing with fig. 5, in the Triggered Service Request flow of the terminal, 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) to 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) and the AMF informs the SMF to release the PDU session, the SMF calls a service Namf _ Communication _ N1N2MessageTransfer of the AMF, sends N1SM information to the terminal, and the N1SM information carries a PDU session identifier and a reason value, wherein the reason value indicates that the terminal needs to rebuild the PDU session corresponding to the PDU session identifier.
(2) The AMF maintains the PDU session;
(3) the AMF informs the terminal and the SMF to release the PDU session.
Referring to fig. 6, in an Inter NG-RAN non-2 based handover (NG-RAN) procedure based on an N2 interface, in step 5 of a Preparation phase, when the SMF determines that the terminal moves out of the service area of the original UPF, the SMF selects a new UPF (I-UPF) to access. At this time, if the SMF fails to select the UPF, the SMF may have any one of the following processing schemes according to the local or operator policy:
(1) the SMF calls a service Namf _ Communication _ N1N2MessageTransfer of the AMF, sends N1SM information to the terminal, and the information N1SM carries a PDU session identifier and a reason value, wherein the reason value indicates that the terminal needs to rebuild the PDU session corresponding to the PDU session identifier. As shown in particular in step S2 in fig. 5.
(2) SMF keeps the PDU conversation, informs AMF, refuses the establishment request of the user interface connection of the PDU conversation;
(3) the SMF releases the PDU session and informs the AMF that the PDU session has been released.
With reference to fig. 6, in the Inter NG-RAN node N2based handover procedure, in step 4 of the proactive phase, when the AMF determines that the terminal moves out of the service area of the original SMF, the AMF selects a new SMF for 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) and the AMF informs the SMF to release the PDU session, the SMF calls a service Namf _ Communication _ N1N2MessageTransfer of the AMF, sends N1SM information to the terminal, and the N1SM information carries a PDU session identifier and a reason value, wherein the reason value indicates that the terminal needs to rebuild the PDU session corresponding to the PDU session identifier.
(2) The 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, including: 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 a PDU session;
maintaining the 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;
wherein 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 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 the establishment request for the user plane connection in the 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 selection of UPF by SMF fails, the PDU session is correspondingly processed, including the reconstruction of the PDU session, the maintenance of the PDU session and the release of the PDU session, thereby avoiding the long-time service failure of the terminal-related PDU session.
Referring to fig. 8, an embodiment of the present invention provides an AMF 800, including: a second transceiver 801 and a second processor 802;
the second processor 802 is configured to perform corresponding processing on a PDU session when the AMF fails to select the SMF;
wherein the corresponding processing includes any one of:
reconstructing a PDU session;
maintaining the 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 service first operation that the SMF calls 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 the terminal, and the SMF sends the first information to the terminal through the first service first operation, where the first information carries a cause value, and the cause value is used to indicate that the terminal reestablishes a 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 the AMF selects the SMF and fails to select, the PDU session is correspondingly processed, including the reconstruction of the PDU session, the maintenance of the PDU session and the release of the PDU session, thereby avoiding the long-time service failure of the terminal related PDU session.
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 the AMF when selection of the SMF fails, where the first message is used to instruct the SMF to release the PDU session.
Optionally, the third transceiver 901 is configured to notify the AMF that the PDU session is 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;
wherein 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 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 an 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 reestablish 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.
Among other things, the processor 1101 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 this 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, performs the steps of the methods provided by embodiments of the present invention.
In fig. 11, the bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by processor 1101, and various circuits, represented by memory 1103, linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further in connection with embodiments of the present invention. The bus interface provides an interface. The transceiver 1102 may be a plurality of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium.
The embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements the processes of the method embodiments, and can achieve the same technical effects, and in order to avoid repetition, the details are not repeated here. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an 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 an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (36)

1. A processing method applied to a Session Management Function (SMF), the method comprising:
when SMF fails to select user plane function UPF, the protocol data unit PDU session is processed correspondingly;
wherein the corresponding processing includes any one of:
reconstructing a PDU session;
maintaining the PDU session;
the PDU session is released.
2. The method of claim 1,
the reestablishing the PDU session includes:
and sending first information to a terminal, wherein the first information carries a reason value, and the reason value is used for indicating the terminal to reestablish the PDU session.
3. The method of claim 2,
the sending the first information to the terminal includes:
calling 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 messaging operation.
4. The method of claim 2, wherein the first information further carries a PDU session identification.
5. The method of claim 1,
after the maintaining the PDU session, the method further comprises:
the establishment request for the user plane connection in the PDU session is rejected.
6. The method of claim 1,
after the releasing the PDU session, the method further comprises:
and informing the AMF that the PDU session is released.
7. A method of processing applied to an AMF, the method comprising:
when the AMF fails to select the SMF, the PDU session is correspondingly processed;
wherein the corresponding processing includes any one of:
reconstructing a PDU session;
maintaining the PDU session;
the PDU session is released.
8. The method of claim 7,
the reestablishing the PDU session includes:
and informing the SMF to release the PDU session.
9. The method of claim 7,
the reestablishing the PDU session includes:
and receiving a first operation of a first service of the AMF called by the SMF, wherein the first service is an AMF communication service, and the first operation is an N1N2 interface message transmission operation.
10. The method of claim 7,
the release of the PDU session includes:
and informing the terminal and/or the SMF to release the PDU session.
11. A processing method applied to SMF is characterized by comprising the following steps:
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.
12. The method of claim 11, wherein after the receiving the first message sent by the AMF, the method further comprises:
and informing the 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 a terminal, wherein the first information carries a reason value, and the reason value is used for indicating the terminal to reestablish the PDU session.
14. The method of claim 13,
the sending the first information to the terminal includes:
calling 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 messaging operation.
15. The method of claim 14, wherein the first information further carries a PDU session identification.
16. A processing method is applied to a terminal, and is characterized in that the method comprises the following steps:
receiving first information sent by an SMF, wherein the first information carries a reason value, and the reason value is used for indicating the terminal to reestablish a PDU session;
and rebuilding the PDU session according to the first information.
17. The method of claim 16, wherein the first information further carries a PDU session identification.
18. An SMF, comprising: a first transceiver and a first processor, wherein,
the first processor is used for correspondingly processing the PDU session when the SMF fails to select the UPF;
wherein the corresponding processing includes any one of:
reconstructing a PDU session;
maintaining the PDU session;
the PDU session is released.
19. The SMF of claim 18,
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.
20. The SMF of claim 19,
the first processor is further used for calling 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 messaging operation.
21. The SMF of claim 19,
the first information also carries a PDU session identifier.
22. The SMF of claim 18,
the first processor is further configured to reject the establishment request for the user plane connection in the PDU session.
23. The SMF of claim 18,
the first transceiver is further configured to notify the AMF that the PDU session is released.
24. An AMF, comprising: a second transceiver and a second processor, wherein,
the second processor is used for correspondingly processing the PDU session when the AMF fails to select the SMF;
wherein the corresponding processing includes any one of:
reconstructing a PDU session;
maintaining the PDU session;
the PDU session is released.
25. The AMF of claim 24,
the second transceiver is further configured to notify the SMF to release the PDU session.
26. The AMF of claim 25,
the second processor is further configured to accept a first operation of a first service, in which the SMF calls the AMF, where the first service is an AMF communication service, and the first operation is an N1N2 interface message transmission operation.
27. The AMF of claim 24,
the second transceiver is further configured to notify the terminal and/or the SMF to release the PDU session.
28. 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 selection of the SMF fails, where the first message is used to instruct the SMF to release the PDU session.
29. The SMF of claim 28,
the third transceiver is configured to notify the AMF that the PDU session is released.
30. The SMF of claim 28,
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.
31. The SMF of claim 30,
the third processor is further used for calling 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 messaging operation.
32. The SMF of claim 30 wherein the first information further carries a PDU session identification.
33. A terminal, comprising: a fourth transceiver and a fourth processor, wherein,
the fourth transceiver is configured to receive first information sent by an SMF, where the first information carries a cause value, and the cause value is used to instruct the terminal to reestablish a PDU session;
and the fourth processor is used for reestablishing the PDU session according to the first information.
34. The terminal of claim 33, wherein the first information further carries a PDU session identifier.
35. 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 a processing method according to any one of claims 1 to 6, or the steps of a processing method according to any one of claims 7 to 10, or the steps of a processing method according to claims 11 to 15, or the steps of a processing method according to claim 16 or 17.
36. A computer readable storage medium, on which a computer program is stored, which computer program, when being executed by a processor, carries out 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, or the steps of the processing method according to claim 16 or 17.
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