WO2019223477A1

WO2019223477A1 - Session processing method and apparatus, network element and storage medium

Info

Publication number: WO2019223477A1
Application number: PCT/CN2019/083752
Authority: WO
Inventors: 李爱华
Original assignee: 中国移动通信有限公司研究院; 中国移动通信集团有限公司
Priority date: 2018-05-21
Filing date: 2019-04-22
Publication date: 2019-11-28
Also published as: CN110519840A; CN110519840B

Abstract

Disclosed are a session processing method and apparatus, a network element and a storage medium. The session processing method may comprise: an access management function determining, in a user equipment (UE) registration process, a session mode of the UE, wherein the session mode comprises: a temporary session mode corresponding to a temporary session, and a conventional session mode corresponding to a conventional session.

Description

Method and device for session processing, network element and storage medium

Cross-reference to related applications

This application is based on a Chinese patent application with an application number of 201810491213.7 and an application date of May 21, 2018, and claims the priority of the Chinese patent application. The entire contents of the Chinese patent application are incorporated herein by reference.

Technical field

The present invention relates to the field of communication technologies, but is not limited to the field of communication technologies, and in particular, to a method and device for session processing, a network element, and a storage medium.

Background technique

When using the network for communication, it is sometimes necessary to establish a session and then use the established session for communication. For example, an Internet of Things (IoT) terminal is a terminal device using a network. Typical IoT terminals can include: smart water meters, smart doors and windows, and so on. When using IoT terminals, it is found that sometimes IoT terminals with weak processing capabilities cannot meet the requirements of the session, or IoT terminals occupy a lot of session resources.

Summary of the Invention

In view of this, embodiments of the present invention desire to provide a method and device for session processing, a network element, and a storage medium.

The technical solution of the present invention is implemented as follows:

A session processing method includes:

The Access Management Function (AMF) determines the UE's session mode during the user equipment (UE) registration process, where the session mode includes a temporary session mode corresponding to a temporary session and Normal conversation mode corresponding to regular conversation.

A session processing method includes:

The SMF receives a temporary session indication sent by the AMF.

Optionally, the method further includes:

Receive notification of temporary session release sent by the AMF;

Release the temporary session.

A session processing method includes:

The UPF receives a temporary session indication sent by the SMF.

A session processing device includes:

The determining module is configured to determine, by the AMF, the session mode of the UE during the UE registration process of the user equipment, wherein the session mode includes a temporary session mode corresponding to a temporary session and a normal session mode corresponding to a normal session.

A session processing device, including:

A receiving module configured to receive, by the SMF, a temporary session indication sent by the AMF.

A session processing device includes:

The receiving module is configured to receive a temporary session indication sent by the SMF at the UPF.

A network element includes:

transceiver,

Memory,

A processor, respectively connected to the transceiver and the memory, for executing executable instructions stored in the memory, controlling the transceiver's information transmission and storage, and the information storage of the memory, and the session processing provided by any one of the foregoing technical solutions method.

A computer storage medium stores computer-executable instructions. After the computer-executable instructions are executed, the method for session processing provided by any one of the technical solutions can be described.

In the technical solution provided by the embodiment of the present invention, the AMF determines the session mode for which a session needs to be established, and according to the determined session mode, it is known whether the currently established session is a temporary session mode corresponding to a temporary session or a normal session mode corresponding to a regular session; The communication resources occupied by the temporary session can be released in a timely manner according to the session mode, thereby reducing the waste of resources and improving the effective utilization of resources. At the same time, the determination of the temporary session mode is determined by the AMF, and there is no need to enhance the processing capacity of the terminal. This reduces the processing capability requirements of the terminal.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1A is a schematic flowchart of a first session processing method according to an embodiment of the present invention;

FIG. 1B is a schematic flowchart of a second session processing method according to an embodiment of the present invention; FIG.

2 is a schematic flowchart of a third session processing method according to an embodiment of the present invention;

3 is a schematic flowchart of a fourth session processing method according to an embodiment of the present invention;

4 is a schematic flowchart of a fifth session processing method according to an embodiment of the present invention;

5 is a schematic structural diagram of a session processing apparatus according to an embodiment of the present invention;

6 is a schematic structural diagram of a network element according to an embodiment of the present invention;

7 is a schematic flowchart of a sixth session processing method according to an embodiment of the present invention;

8 is a schematic flowchart of a seventh session processing method according to an embodiment of the present invention;

9 is a schematic flowchart of an eighth session processing method according to an embodiment of the present invention;

FIG. 10 is a schematic flowchart of a ninth session processing method according to an embodiment of the present invention.

Detailed ways

The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments of the specification.

In the fifth generation of mobile communications (5G), before sending data packets, the terminal may need to interact with the Radio Access Network (RAN), Core Network (CN), etc. to establish end-to-end End the session, and then use the session to send data packets. For example, IoT terminals communicate using 5G networks. IoT is a low-power terminal compared to advanced terminals such as mobile phones. With the complication of session establishment, on the one hand, the processor of the IoT terminal is required to have higher processing capabilities, but this will undoubtedly lead to the hardware cost of the IoT terminal. rise. On the other hand, if the IoT terminal does not have more complex processing capabilities, it may be that a large number of PDU terminals of the IoT terminal are established in the RAN or CN, which causes a large amount of network resources in the network to be occupied. Therefore, in the embodiment of the present invention, if the AMF that manages and controls the access of the IoT terminal detects that the IoT terminal has data to send, it will determine the session mode in which the IoT terminal is currently establishing a session; if the session mode is a temporary session mode, the AMF It will inform the network element related to the session establishment of the temporary session indication, for example, SMF, UPF, etc. In this way, the SMF and UPF can release the temporary session in time after the temporary session ends, thereby releasing the network resources occupied by the temporary session, thereby reducing network resources Consumption is constant, and at the same time, the judgment of the temporary session indication is determined by the AMF. In this way, the processing capability of the IoT terminal does not need to be enhanced, and the low cost of the IoT terminal can be maintained. Alternatively, according to the determined temporary session instruction, if a temporary session is established, the release of the temporary session is automatically triggered, for example, triggering itself to release the temporary session, triggering SMF and / or UPF to release the temporary session. In short, if the AMF determines that the established session is a temporary session establishment, it will perform predetermined operations related to the temporary session, including: sending a temporary session instruction, triggering the release of the temporary session, and triggering the deletion of the context of the temporary session. Here, an IoT terminal is used as an example for description. In specific implementation, the terminal that needs to establish a session is not limited to the IoT terminal. For example, the terminal may be a mobile phone, a tablet computer, or a wearable device held by a user.

This embodiment provides a session processing method, including:

The AMF determines a session mode. For example, as shown in FIG. 1A, the method may include: Step S101: the AMF determines a session mode of the UE during a UE registration process. It is worth noting that the AMF determines that the session mode is not limited to the registration process, and may also be during the UE requesting the session.

The conversation mode may include a temporary conversation mode or a regular conversation mode. The temporary session mode corresponds to a temporary session; the regular session mode corresponds to a regular session.

As shown in FIG. 1B, the method further includes:

Step S120: If the session mode is a temporary session mode, send a temporary session indication to the SMF.

In some embodiments, the step S120 may include: if the session mode is a temporary session mode, sending the temporary session indication to the SMF during a session establishment process.

When the AMF receives a session request, it first determines whether the requesting session establishment is a temporary session or a regular session, so as to determine a session mode corresponding to the current requesting session establishment.

The temporary session may be a session temporarily established by a user terminal, and a general session duration is relatively short and not fixed.

The regular session may be a session other than the temporary session. In some embodiments, the regular session may be divided into: a permanent session or a fixed duration session. In this embodiment, in order to avoid the problem of resource waste caused by the resources occupied by the establishment of the temporary session that cannot be cancelled in time, when the communication device such as the UE does not directly or indirectly specify the duration of the temporary session, the The session instruction sends a temporary session instruction to the SMF. In this way, the SMF can facilitate the SMF to grasp the temporary session instruction of the currently established session on the one hand, and perform subsequent session processing operations according to the temporary session instruction, for example, in a timely manner. Perform the release operation of the temporary session, for example, maintain the corresponding session. The maintenance here may include regular maintenance or non-scheduled maintenance, for example, detecting the data transmission amount of the corresponding session, and appropriately adjusting the communication resources occupied by the corresponding session, for example, adjusting the amount of communication resources occupied, and adjusting the communication occupied. Communication resource parameters such as the type of resource to improve the communication quality of the session, while ensuring that unnecessary resource waste is reduced, and the effective utilization of resources is improved.

In some embodiments, the step S110 may include: the AMF determining whether the session to be established is a temporary session or a regular session.

In this embodiment, at least it is necessary to distinguish whether the session to be established is a temporary session or a regular session. The session to be established is a temporary session to determine the session mode.

After determining the temporary session indication, the AMF sends a temporary session indication to the SMF according to the temporary session indication, so that the AMF informs the SMF or the UPF that the currently established session is a temporary session, so that the SMF or the UPF triggers the temporary session in time. Release, thereby reducing the waste of resources caused by the various resources occupied by temporary sessions that cannot be released in a timely manner.

In step S120 in this embodiment, the temporary session indication is sent to the SMF only when the session mode is the temporary session mode. In some embodiments, only the temporary session indication of the specially-typed session is notified to the SMF. The session sending the temporary session indication is a regular session. In this way, the signaling overhead caused by informing the regular session mode can be reduced.

In some implementations, the step S110 may include: the AMF determining the session mode during a terminal registration process.

In this way, when the terminal registers with the network, the AMF confirms which session mode the terminal needs to establish.

The step S110 may include determining the session mode according to at least one of a connection-only MICO mode initiated by a mobile terminal, subscription data, the local configuration of the AMF, the local policy of the AMF, and a registration message. In some embodiments, the step S110 may include at least one of the following:

If the terminal has negotiated to use the Mobile Initiated Connection Only (MICO) mode during registration, determining that the temporary session indication is a temporary session establishment;

If the terminal's subscription data indicates a temporary session, determine to adopt a temporary session mode;

If the local configuration or local policy of the AMF indicates a temporary session, determining to adopt a temporary session mode;

If the terminal carries an instruction for a temporary session during the registration process, it is determined that the temporary session mode is adopted.

In some implementations, the step S110 further includes:

If the terminal does not use the MIMO mode during registration, the subscription data is not indicated as a temporary session, the local configuration or local policy of the AMF does not indicate a temporary session, and the terminal's registration message does not carry the temporary session indication, it can be considered as the current The conversation mode corresponding to the conversation is the normal conversation mode.

For example, if the contract data of the terminal indicates that the data network name (Data Network Name, DNN) used by the terminal to request for the established session corresponds to a temporary session, the temporary session indicates that the temporary session is established;

If the local configuration or local policy of the AMF indicates that the session to be established is a temporary session, it is determined to be a temporary session mode.

For example, if the AMF receives an indication of a temporary session sent by the terminal through a Non-Access Stratum (NAS) message, the temporary session indication is a temporary session establishment. The NAS message may be sent by various terminals, for example, a NAS message sent by an IoT terminal.

The AMF can perform data query in the cache or other network elements. If the terminal has been negotiated to use the MICO-only mode during the registration, it is determined that the current session needs to be established as a temporary session, and the temporary session indicates that the temporary session is established. Regular session establishment.

The AMF can query the contract database or unified database for the contract data query of the terminal currently initiating the session establishment request. If the terminal's contract data indicates or indicates the temporary session corresponding to the DNN contracted by the terminal, it will automatically consider that the terminal currently requests to establish a session. It is a temporary session, so it can be determined that the temporary session indication is that the temporary session is established.

AMF can locally configure various session establishment policies, for example, configure UE granularity or UE group granularity session establishment policies, or DNN granularity session establishment policies, and PDU granularity session establishment policies. According to the session strategy, it can determine the current need to establish Whether your session is temporary or regular. For example, the locally configured policy may be set to correspond to the DNN and session type, and the corresponding relationship between the PDU and the temporary session. Therefore, the temporary session indication may be determined according to the DNN or PDU used by the current terminal in combination with the local configuration policy. This local configuration policy can be used by the AMF to receive the policy stored in the AMF from the Policy Control Function (PCF), or it can be automatically reported by the network elements such as the UE to the AMF. In short, there are many ways to obtain the AMF local configuration policy, and it is not limited to any of the above.

In this embodiment, the registration message may be any message sent by the terminal during the registration process. For example, a NAS message sent by a terminal. A new temporary session indication bit is added to the registration message. When the bit is the first value, it indicates that a temporary session is established. Otherwise, it can be determined that the session to be established is a non-temporary session. The bit may be one of the reserved bits in the registration message, for example, the bit may be one or more of the reserved bits in the NAS message, and so on.

The NAS message may be a message sent directly by the terminal to the AMF, and the base station merely transparently transmits the NAS message sent by the terminal to the AMF. The NAS message herein may be one of the foregoing registration messages, and the foregoing registration message may be a registration request and / or an attachment request of a terminal, and the like.

In some embodiments, the method further comprises: the AMF sending the temporary session indication to the UE to inform the establishment of a temporary session.

In some embodiments, the releasing the temporary session may include at least one of the following:

Release resources used by temporary sessions;

Delete the context of the temporary session.

The AMF releases a temporary session based on a timer and deletes the context of the temporary session. The timer here may be a timer that counts the duration of the temporary session. If the timer expires, it can be considered that the time to delete the context of the temporary session is reached. That is, the context of the corresponding temporary session is deleted, and the context of the temporary session that is no longer needed reduces the cache space of the AMF.

The AMF releases the temporary session based on a timer. In this embodiment, releasing a temporary session includes releasing resources occupied by the temporary session. The resources may include network resources, storage resources, and computing resources. The network resources may be used for signaling and / or data corresponding to the temporary sessions. Transmission, storage resources may include: storage resources that store the context of temporary sessions, storage resources that cache session data packets for temporary sessions, and other storage resources; computing resources may be various processing resources, such as data packet processing and routing and forwarding calculations After the resources of the temporary session are released, they can be used for other sessions, thereby avoiding the problem of low effective utilization of resources caused by long-term occupation of resources but not using them, and improving the effective utilization of resources.

In some embodiments, the AMF sends the first predetermined information to the SMF according to the temporary session instruction. The first predetermined information may be the foregoing temporary session instruction, or may be instruction information indicating the release of the temporary session. If the temporary session indication received by the SMF, if the temporary session indication is a temporary session type, a timer is automatically established, and the time for releasing the temporary session is determined based on the timer. If the AMF sends the instruction information to the SMF, the SMF does not need to set a timer, and can release the temporary session directly when the instruction information is received.

As shown in FIG. 2, this embodiment provides a session processing method, including:

Step S110: the AMF determines a session mode;

Step S121: if the session mode is a temporary session mode, start a timer;

Step S130: If the timer expires and no data packet is detected, release the temporary session.

Here, the timer timeout is: the timer's time length exceeds a preset time length; the detected no data message is: the message sent by the terminal is not received or sent to the terminal within the time counted by the timer Message, the temporary session is released.

In some embodiments, the method further includes:

Update the timer; if a data message transmitted in a temporary session is received, restart the timer until a timer expires and no data message is received within the timer's timeout period, then release the temporary session.

The method in some implementations further comprises:

Release the temporary session as instructed by the terminal.

For example, if the terminal sends information such as a release instruction of the temporary session in a dedicated release message or a data message, the AMF may also release the temporary session according to the instruction of the terminal. For example, when the terminal is in a temporary session, the last data message transmitted indicates that this is the last message of the session, and the AMF may release the temporary session according to the message.

In some other embodiments, the method further includes:

Step S140: The AMF sends a notification to release the temporary session release to the SMF.

In this way, the SMF will release the corresponding temporary session after receiving the notification. In some implementations, the notification carries a session identifier of the temporary session that needs to be released, for the SMF to determine which one of the temporary sessions needs to be released. In still other embodiments, the AMF directly sends the notification by using a control plane of the temporary session that needs to be released, so that the SMF knows the corresponding temporary session that needs to be released after receiving the notification.

In some embodiments, the SMF further forwards the notification of releasing the temporary session sent by the AMF to the UPF, so as to trigger the UPF to also release the corresponding temporary session.

The SMF is notified by the AMF and / or the UPF is notified by the SMF. The SMF and the UPF do not need to set a timer. Instead, the temporary session can be released according to the notification sent by the AMF. Therefore, the SMF and the UPF can be changed without modification Strong technical compatibility.

In some implementations, the AMF itself does not establish a set timer. Instead, the SMF starts a timer after receiving a temporary session indication. If the timer expires and no data packet is detected or the terminal instructs to release the temporary session, then The SMF itself releases the temporary session and sends a notification to the AMF to release the temporary session. In this way, the AMF can also release the temporary session based on the SMF notification.

As shown in FIG. 3, this embodiment provides a session processing method, including:

Step S210: The SMF receives a temporary session indication from the AMF. For example, during the session establishment process, a temporary session indication sent by the AMF is received.

In some embodiments, the method further includes:

Sending the temporary session indication to the UPF.

In this embodiment, the SMF receives the temporary session indication from the AMF, so that the SMF knows that the current session mode is the temporary session mode. In some embodiments, the method may further include: further informing the UPF of the temporary session indication. In this way, the UPF may know that the current session mode is the temporary session mode according to the temporary session.

In some embodiments, the method further includes:

The SMF starts a timer according to the temporary session instruction;

If the timer expires and no data packet is detected, the temporary session is released.

In some embodiments, the method further includes:

SMF releases temporary sessions based on terminal instructions.

In some embodiments, the method further includes:

The SMF sends a notification to release the temporary session to the AMF; and / or, the SMF sends a notification to release the temporary session to the UPF.

AMF, SMF, and UPF release temporary sessions may include at least one of the following:

Release resources used by temporary sessions;

Delete the context of the temporary session, etc.

As shown in FIG. 4, this embodiment provides a session processing method, including:

Step S310: The UPF receives the temporary session indication sent by the SMF.

In some embodiments, the method further includes:

The UPF receives a notification from the AMF to release the temporary session;

The temporary session is released according to the notification. The notification may be generated by the SMF itself, or the customer receives the SMF from the AMF and forwards it to the UPF.

In other embodiments, the method further includes:

Start a timer according to the temporary session instruction;

If the timer expires and no data message is detected, the temporary session is released.

After receiving the temporary session indication, the UPF automatically starts the timer according to the temporary session indication. If the timer expires and no data packet is detected, the temporary session is released.

In some embodiments, the method further includes:

In some embodiments, the method further includes: if the PDU session type of the temporary session is a network protocol IP type, replacing the source address in the data packet with the IP address allocated to the terminal by the SMF. The current session type may include a session type transmitted based on an IP address and a session type transmitted based on a non-IP address, for example, a session type transmitted based on a tunnel identifier and / or a session type transmitted through a virtual local area network. If the current session type is IP, you need to replace the source address in the packet with the IP address assigned by the SMF. The IP address can be IPv4, IPv6, or IPv4 and IPv6.

As shown in FIG. 5, this embodiment provides a session processing apparatus, which can be applied to AMF and includes:

The determining module 110 is configured to determine a session mode by the AMF. For example, the determining module 110 may be specifically used by the AMF to determine a session mode of the UE during a user equipment UE registration process, wherein the session mode includes a temporary session mode corresponding to a temporary session and a normal session corresponding to a regular session Conversation mode.

In some embodiments, the apparatus further includes:

The sending module 120 is configured to send the temporary session indication to a session management function SMF. The sending module 120 may be configured for the AMF to send the temporary session indication to the SMF during a session establishment process. If the SMF sends a temporary session indication to the UPF, the SMF may also send the temporary session indication to the UPF during the session establishment process.

In some embodiments, the session mode includes a temporary session mode corresponding to a temporary session and a normal session mode corresponding to a regular session.

In some embodiments, the sending module 120 is further configured to send a temporary session indication to a session management function SMF if the session mode is a temporary session mode. For example, the sending module 120 is specifically configured to send a temporary session indication to the session management function SMF during the session establishment process if the session mode is a temporary session mode.

In some embodiments, the sending module is further configured to send the temporary session indication to the UE by the AMF.

In some embodiments, the temporary session indication is further used for sending the SMF to a user plane function UPF.

In some embodiments, the temporary session indication is used by the SMF to start a timer for temporary session release; and / or the temporary session indication is used by the UPF to start a timing for temporary session release Device.

In some embodiments, the apparatus further includes:

Startup module, configured to start timer;

The release module is configured to release a temporary session if the timer expires and no data packet is detected.

In some embodiments, the apparatus further includes:

A release module configured to release a temporary session according to a terminal instruction.

In some embodiments, the releasing the temporary session includes at least one of the following:

The AMF releases the temporary session;

The AMF sends a notification to the SMF to release a temporary session.

In some embodiments, the notification is configured for the SMF to send to the UPF to cause the UPF to release the temporary session.

In some embodiments, the apparatus further includes:

A receiving module configured to receive a notification of releasing a temporary session sent by the SMF;

A release module configured to release the temporary session according to the notification.

In some embodiments, the determining module 110 is configured for the AMF to determine the session mode during a terminal registration process.

For example, the determining module 110 may be configured to determine the session mode according to a connection MICO mode initiated by a mobile terminal only, subscription data, the local configuration of the AMF, the local policy of the AMF, or an instruction of the terminal. The indication of the terminal may be the indication of the terminal carried in various messages, for example, the indication carried in the registration message of the terminal during the registration process.

In some embodiments, the determining module 110 is configured to perform at least one of the following:

If the terminal has negotiated to use the connection MICO mode initiated by the mobile terminal only during the registration process, it is determined to use the temporary session mode;

The above-mentioned determining module 110, sending module 120, receiving module, and releasing module can all be program modules. After being executed by the processor, it can implement the determination of the temporary session instruction, the sending of the temporary session instruction, and the reception of the NAS message.

An embodiment of the present invention provides a session processing apparatus, which can be applied to SMF, including:

The receiving module is configured to receive, by the session management function SMF, a temporary session indication sent by the access management function AMF.

In some embodiments, the receiving module is further configured to receive a notification of the temporary session release sent by the AMF; the device further includes: a release module for releasing the temporary session.

In some embodiments, the apparatus further includes:

The sending module is configured to send a notification to the UPF to release the temporary session.

In some embodiments, the apparatus further includes:

A startup module configured to start a timer according to the temporary session indication;

The device further includes:

The SMF releases the temporary session;

Sending, by the SMF, a notification to release the temporary session to the AMF;

The SMF sends a notification to the user plane function UPF to release the temporary session.

In some embodiments, the sending module in the SMF is specifically configured to send the temporary session indication to the UPF.

This embodiment also provides another session processing apparatus, which can be applied to the UPF and may include:

The receiving module is used for the user plane function UPF to receive the temporary session instruction sent by the session management function SMF.

The device further includes:

A startup module configured to start a timer according to the temporary session instruction;

The release module is configured to release the temporary session if the timer expires and no data packet is detected.

In some embodiments, the apparatus further includes:

The conversion module is configured to replace the source address in the data packet with the IP address allocated by the SMF to the terminal if the protocol data unit PDU session type of the temporary session is a network protocol IP type.

As shown in FIG. 6, this embodiment provides a network element, including:

Transceivers can correspond to various communication interfaces, such as wired network interfaces and transceiver antennas;

Memory,

A processor, respectively connected to the transceiver and the memory, for executing executable instructions stored in the memory, controlling the transceiver's information transmission and storage, and the information storage of the memory, and implementing one of AFM, SMF or UPF The session processing method provided by one or more technical solutions, for example, executes one or more of the session processing methods shown in FIG. 1A to FIG. 4 and FIG. 7 to FIG. 10.

The processor can be connected to the transceiver and the memory through a bus, and can control the transceiver's information transmission and storage, and the memory's information storage, so as to implement the session processing.

The processor may be various types of processors, such as a central processing unit, a microprocessor, a digital signal processor, a programmable array, a digital signal processor, an application specific integrated circuit, or an image processor.

The processor may be connected to the memory through a bus. The bus may be an integrated circuit bus or the like.

In some embodiments, the terminal device may further include a communication interface, which may include a network interface, for example, a local area network interface, a transceiver antenna, and the like. The communication interface is also connected to the processor and can be used for information transmission and reception.

In some embodiments, the terminal device further includes a human-machine interaction interface. For example, the human-machine interaction interface may include various input and output devices, such as a keyboard, a touch screen, and the like.

An embodiment of the present invention provides a computer storage medium, where the computer storage medium stores computer executable instructions; after the computer executable instructions are executed,

It is applied to the session processing method provided by one or more technical solutions in AFM, SMF or UPF.

The storage medium may be a non-transitory storage medium. After the executable code stored in the storage medium is executed by a processor, one or more of the session processing methods shown in FIG. 1A to FIG. 4 and FIG. 7 to FIG. 10 may be executed.

Several specific examples are provided below in combination with any of the above embodiments:

Example 1:

As shown in FIG. 7, this example provides a method for processing a session, including:

Step 1: During the UE registration process, the AMF determines the session mode adopted by the UE according to the following conditions: The session mode includes: a temporary session mode corresponding to a temporary session and a normal session mode corresponding to a regular session; the specific session mode is determined to be available. Including one or more of the following:

If the terminal has negotiated to use the MICO mode during the registration process, the temporary session mode is used;

If the contract data of the terminal indicates a temporary session, a temporary session mode is adopted;

If a temporary session is indicated according to the local configuration or local policy of the AMF, the temporary session mode is adopted;

If the terminal carries a "temporary session indication", the temporary conversation mode is adopted;

In other cases, the normal conversation mode is adopted.

Step 2: Data message transmission, including: the terminal sends a data message to the AMF through a NAS message or the like.

Step 3: The AMF performs integrity check on the data message and decrypts the data.

Step 4: According to the session mode negotiated during the registration process, the AMF initiates a session establishment process. If the AMF decides to establish a temporary session, the AMF needs to send a PDU session request to the SMF, the request carrying a temporary session indication.

Step 5: The SMF initiates an N4 session establishment process with the UPF, for example, the SMF interacts with the UPF for an N4 session request and an N4 session response based on the N4 session request. If it is a temporary session, the SMF also needs to send a temporary session indication to the UPF.

Step 6: the SMF sends a PDU session response to the AMF;

Step 7: The AMF sends N2 session data to the SMF.

Step 8: The SMF sends uplink N4 session data to the UPF.

Step 9: The UPF sends downlink N4 session data to the SMF.

Step 10: The SMF sends N2 session data to the AMF.

Step 11: data decryption and integrity verification;

Step 13: The temporary session is released.

Step 13 has three options for the release of the temporary session:

13a: For temporary sessions, AMF, SMF, and UPF each start a timer (the timers have the same duration). When the timer expires, the terminal still has no data to send, or according to the terminal's indication of the last packet when sending uplink data, it is considered that After the data transmission ends, the AMF, SMF, and UPF release the corresponding temporary sessions respectively. Refer to FIG. 8 for the release of the temporary session in step 13a.

13b: For temporary sessions, AMF triggers temporary session release (AMF starts a timer, the timer expires, and the terminal still has no data to send, or it is indicated as the last packet when the terminal sends uplink data), including: AMF notifies SMF The corresponding PDU session is released, and the SMF notifies the UPF to release the corresponding temporary session. The release of the temporary session in step 13b can be seen in FIG. 9.

13c: For temporary sessions, SMF triggers temporary session release (SMF starts a timer, the timer expires, and the terminal still does not send data packets, or according to the terminal's indication as the last packet when sending uplink data), SMF needs to be separately AMF and UPF are notified to release the corresponding temporary session. Refer to FIG. 10 for the release of the temporary session in step 13c.

During the UE registration process, the AMF determines whether the session mode adopted by the UE is a temporary session mode or a regular session mode according to the following conditions:

In other cases, the normal conversation mode is adopted.

AMF initiates session establishment and sends temporary session indication to SMF for temporary session;

For temporary sessions, the AMF deletes the local session context through a timer or triggers the session release process, which involves SMF and UPF.

The SMF initiates N4 session establishment and sends a temporary session indication to the UPF for the temporary session;

For temporary sessions, SMF deletes the local session context through a timer or triggers a session release process. The N4 session here is based on the session of the N4 interface. At this time, the N4 session can be a temporary session or a regular session. UPF is for temporary sessions and deletes the local session context through a timer.

If the PDU session is a temporary session and the PDU session type is an IP type (IPv4 or IPv6 or IPv4v6), the UPF needs to modify the source address of the data packet to the IP address assigned to the UE by the SMF.

This example proposal proposes a data transmission scheme for the terminal's temporary session, which simplifies the implementation complexity of the terminal, especially for IoT-type terminals. At the same time, the core network reduces the resource occupation rate of the core network device by establishing a temporary PDU session. The terminal sends data before the session is established, and determines whether a long-term PDU session needs to be established according to different IoT application scenarios.

In the several embodiments provided in this application, it should be understood that the disclosed device and method may be implemented in other ways. The device embodiments described above are only schematic. For example, the division of the units is only a logical function division. In actual implementation, there may be another division manner, such as multiple units or components may be combined, or Can be integrated into another system, or some features can be ignored or not implemented. In addition, the displayed or discussed components are coupled, or directly coupled, or communicated with each other through some interfaces. The indirect coupling or communications of the device or unit may be electrical, mechanical, or other forms. of.

The units described above as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, which may be located in one place or distributed across multiple network units; Some or all of the units may be selected according to actual needs to achieve the objective of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing module, or each unit may be separately used as a unit, or two or more units may be integrated into one unit; the above integration The unit can be implemented in the form of hardware, or in the form of hardware plus software functional units.

Those of ordinary skill in the art may understand that all or part of the steps of implementing the foregoing method embodiments may be completed by a program instructing related hardware. The foregoing program may be stored in a computer-readable storage medium. Including the steps of the above method embodiment; and the foregoing storage medium includes: a mobile storage device, a read-only memory (ROM), a random access memory (random access memory, RAM), a magnetic disk or an optical disk, and the like A medium on which program code can be stored.

The above are only specific embodiments of the present invention, but the scope of protection of the present invention is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed by the present invention. It should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

A session processing method includes:

The access management function AMF determines a session mode of the UE during a user equipment UE registration process, wherein the session mode includes a temporary session mode corresponding to a temporary session and a normal session mode corresponding to a regular session.
The method according to claim 1, wherein:

The determining the session mode of the UE by the access management function AMF during the user equipment UE registration process includes:

The session mode is determined according to a connection-only MICO mode initiated by a mobile terminal, subscription data, local configuration of the AMF, local policy of the AMF, or an instruction of the terminal.
The method according to claim 1, wherein:

The determining the session mode according to a connection MICO mode initiated by a mobile terminal only, subscription data, the local configuration of the AMF, the local policy of the AMF, or an indication of the terminal includes at least one of the following:

If the terminal has negotiated to use the MICO mode during the registration process, it is determined to use the temporary session mode;

If the terminal's subscription data indicates a temporary session, determine to adopt a temporary session mode;

If the local configuration or local policy of the AMF indicates a temporary session, determining to adopt a temporary session mode;

If the terminal carries an instruction for a temporary session during the registration process, it is determined that the temporary session mode is adopted.
The method of claim 1, further comprising:

If the session mode is a temporary session mode, a temporary session indication is sent to the session management function SMF during the session establishment process.
The method according to claim 4, wherein the method further comprises:

Sending the temporary session indication to the UE.
The method according to claim 5, wherein:

The temporary session indication, used by the SMF to start a timer for temporary session release;

and / or,

The temporary session indication is used by the user plane function UPF to start a timer for temporary session release.
The method according to claim 1, wherein:

The method further includes:

Start timer

If the timer expires and no data packet is detected, the temporary session is released.
The method according to claim 1, wherein:

The method further includes:

Release the temporary session as instructed by the terminal.
The method according to claim 8, wherein the releasing the temporary session comprises at least one of the following:

The AMF releases the temporary session;

The AMF sends a notification to the SMF to release the temporary session.
The method according to claim 9, wherein:

The notification is used for the SMF to send to the UPF to make the UPF release the temporary session.
The method according to claim 10, wherein:

The method further includes:

Receiving a notification of releasing a temporary session sent by the SMF;

According to the notification, the temporary session is released.
A session processing method includes:

The session management function SMF receives a temporary session indication sent by the access management function AMF.
The method according to claim 12, further comprising:

Receive notification of temporary session release sent by the AMF;

Release the temporary session.
The method according to claim 12, wherein:

The method further includes:

Send a notification to the user plane function UPF to release the temporary session.
The method according to claim 13, further comprising:

Start a timer according to the temporary session instruction;

If the timer expires and no data packet is detected, the temporary session is released.
The method according to claim 12, further comprising:

Release the temporary session as instructed by the terminal.
The method according to claim 14 or 16, wherein:

The releasing the temporary session includes at least one of the following:

The SMF releases the temporary session;

Sending, by the SMF, a notification to release the temporary session to the AMF;

The SMF sends a notification to the user plane function UPF to release the temporary session.
The method according to claim 12, wherein the method further comprises:

Sending the temporary session indication to the UPF.
A session processing method includes:

The user plane function UPF receives a temporary session indication sent by the session management function SMF.
The method of claim 19, further comprising:

Start a timer according to the temporary session instruction;

If the timer expires and no data message is detected, the temporary session is released.
The method of claim 19, further comprising:

Receive a notification from the SMF to release the temporary session;

Release the temporary session according to the notification.
The method according to claim 19, wherein the method further comprises:

If the protocol data unit PDU session type of the temporary session is a network protocol IP type, the source address in the data packet is replaced with the IP address allocated by the SMF to the terminal.
A session processing device, including:

A determining module configured to access the management function AMF to determine a session mode of the UE during a user equipment UE registration process, wherein the session mode includes a temporary session mode corresponding to a temporary session and a normal session corresponding to a regular session mode.
A session processing device, including:

The receiving module is configured to receive, by the session management function SMF, a temporary session indication sent by the access management function AMF.
A session processing device, including:

The receiving module is configured to receive, by the user plane function UPF, a temporary session indication sent by the session management function SMF.
A network element including:

transceiver,

Memory,

A processor, respectively connected to the transceiver and the memory, for executing executable instructions stored in the memory, controlling the transceiver of the transceiver and the storage of the memory, and realizing claims 1 to 11, 12 to 18 Or the method provided in any of 19 to 22.
A computer storage medium storing computer-executable instructions; after the computer-executable instructions are executed, the method provided in any one of claims 1 to 11, 12 to 18, or 19 to 22 can be implemented .