CN115150870A - Session residue processing method, device, session management functional entity and storage medium - Google Patents

Session residue processing method, device, session management functional entity and storage medium Download PDF

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Publication number
CN115150870A
CN115150870A CN202210766054.3A CN202210766054A CN115150870A CN 115150870 A CN115150870 A CN 115150870A CN 202210766054 A CN202210766054 A CN 202210766054A CN 115150870 A CN115150870 A CN 115150870A
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session
state
satellite terminal
base station
identifier
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CN115150870B (en
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何学波
周远长
吕东
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Guangzhou Aipu Road Network Technology Co Ltd
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Guangzhou Aipu Road Network Technology Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/08—Testing, supervising or monitoring using real traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/14—Direct-mode setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/30—Connection release
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/06—Airborne or Satellite Networks

Abstract

The application provides a session residual processing method, a session residual processing device, a session management functional entity and a storage medium, and relates to the technical field of communication. The method comprises the following steps: sending an end-to-end state request message to a first satellite terminal, wherein the end-to-end state request message comprises: the state request identifier is used for requesting a tunnel state of an end-to-end session corresponding to the session identifier from the first satellite terminal; the end-to-end session is a communication session between the first satellite terminal and the second satellite terminal; receiving an end-to-end state response message sent by a first satellite terminal; determining the state of the end-to-end conversation according to the end-to-end state response message; and if the state of the end-to-end session is an abnormal state, initiating a hang-up flow aiming at the end-to-end session. The method and the device can effectively process the residual end-to-end conversation, and avoid wasting the resources of the space base station.

Description

Session residue processing method, device, session management functional entity and storage medium
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for processing session residuals, a session management functional entity, and a storage medium.
Background
Under the mode that the mobile broadband system supports end-to-end communication service, a user directly exchanges information with the space section system through the satellite terminal, and information flow does not need to pass through the ground section system. However, the communication service mode requires ground segment system control, and the access authentication, connection management, mobility management and other processes all require ground segment equipment to participate.
Under the condition that the end-to-end communication is successfully established, due to the fact that the terminal equipment is abnormally disconnected or the hang-up flow is abnormally interrupted when the core network processes the hang-up request of the terminal equipment, end-to-end session information still remains in the core network, and resources of the space base station are wasted.
Disclosure of Invention
The present invention provides a method, an apparatus, a session management function entity and a storage medium for processing a session residue, so as to effectively process a residual end-to-end session and avoid wasting resources of a space base station.
In order to achieve the above purpose, the technical solutions adopted in the embodiments of the present application are as follows:
in a first aspect, an embodiment of the present application provides a session residual processing method, where the method includes:
sending an end-to-end state request message to a first satellite terminal, wherein the end-to-end state request message comprises: the state request identifier is used for requesting the first satellite terminal for the tunnel state of the end-to-end session corresponding to the session identifier; the end-to-end session is a communication session between the first satellite terminal and a second satellite terminal;
receiving an end-to-end state response message sent by the first satellite terminal;
determining the state of the end-to-end session according to the end-to-end state response message;
and if the state of the end-to-end session is an abnormal state, initiating a hang-up flow aiming at the end-to-end session.
Optionally, before sending the end-to-end status request message to the first satellite terminal, the method further includes:
receiving an end-to-end call request forwarded by a first spatial base station from the first satellite terminal and an identification of the first spatial base station, the end-to-end call request comprising: an identity of the second satellite terminal;
inquiring a second SMF of the second satellite terminal according to the identifier of the second satellite terminal;
forwarding the end-to-end call request and the identification of the first spatial base station to the second SMF, so that the second SMF informs the second satellite terminal to respond to the end-to-end call request, and sends the identification of the first spatial base station to a second spatial base station of the second satellite terminal;
receiving an end-to-end response message sent by the second SMF, wherein the end-to-end response message comprises: an end-to-end call response and an identification of the second spatial base station;
transmitting the identification of the second spatial base station to the first spatial base station to enable the first spatial base station and the second spatial base station to establish an end-to-end session between the first satellite terminal and the second satellite terminal based on the respective identifications.
Optionally, the determining the state of the end-to-end session according to the end-to-end state response message includes:
if the end-to-end status response message only includes: and the state response identifier determines that the state of the end-to-end session is a normal state.
Optionally, the determining the state of the end-to-end session according to the end-to-end state response message further includes:
if the end-to-end status response message includes: and determining the state of the end-to-end session to be an abnormal state by using the state response identifier and the end-to-end state information.
Optionally, the method further includes:
and determining the reason of the abnormal state of the end-to-end session according to the state value of the end-to-end state information.
Optionally, the determining, according to the state value of the end-to-end state information, a reason of an abnormal state of the end-to-end session includes:
if the state value of the end-to-end state information is a first preset state value, determining that the reason of the abnormal state is as follows: hang up the exception.
Optionally, the determining, according to the state value of the end-to-end state information, a reason of an abnormal state of the end-to-end session includes:
if the state value of the end-to-end state information is a second preset state value, determining that the reason of the abnormal state is as follows: the communication is abnormal.
In a second aspect, an embodiment of the present application further provides a device for processing session residuals, where the device includes:
a sending module, configured to send an end-to-end status request message to a first satellite terminal, where the end-to-end status request message includes: the state request identifier is used for requesting the first satellite terminal for the tunnel state of the end-to-end session corresponding to the session identifier; the end-to-end session is a communication session between the first satellite terminal and a second satellite terminal;
a receiving module, configured to receive an end-to-end status response message sent by the first satellite terminal;
a state determining module, configured to determine a state of the end-to-end session according to the end-to-end state response message;
and the hang-up initiating module is used for initiating a hang-up flow aiming at the end-to-end session if the state of the end-to-end session is an abnormal state.
Optionally, the apparatus further comprises: a query module;
the receiving module is further configured to receive an end-to-end call request from the first satellite terminal and an identifier of the first spatial base station, where the end-to-end call request includes: an identity of the second satellite terminal;
the query module is configured to query a second SMF where the second satellite terminal is located according to the identifier of the second satellite terminal;
the sending module is further configured to forward the end-to-end call request and the identifier of the first spatial base station to the second SMF, so that the second SMF notifies the second satellite terminal to respond to the end-to-end call request, and sends the identifier of the first spatial base station to a second spatial base station of the second satellite terminal;
the receiving module is further configured to receive an end-to-end response message sent by the second SMF, where the end-to-end response message includes: an end-to-end call response and an identification of the second spatial base station;
the sending module is further configured to send the identifier of the second spatial base station to the first spatial base station, so that the first spatial base station and the second spatial base station establish an end-to-end session between the first satellite terminal and the second satellite terminal based on their respective identifiers.
Optionally, the state determining module is specifically configured to, if the end-to-end state response message only includes: and the state response identifier determines that the state of the end-to-end session is a normal state.
Optionally, the status determining module is further configured to, if the end-to-end status response message includes: and determining the state of the end-to-end conversation to be an abnormal state by using the state response identifier and the end-to-end state information.
Optionally, the apparatus further comprises:
and the abnormal reason determining module is used for determining the reason of the abnormal state of the end-to-end conversation according to the state value of the end-to-end state information.
Optionally, the abnormal cause determining module is specifically configured to determine, if the state value of the end-to-end state information is a first preset state value, that the cause of the abnormal state is: hang up the exception.
Optionally, the abnormal cause determining module is further configured to determine, if the state value of the end-to-end state information is a second preset state value, that the cause of the abnormal state is: the communication is abnormal.
In a third aspect, an embodiment of the present application further provides a session management function entity, including: a transceiver, a processor, a storage medium and a bus, wherein the transceiver is configured to receive and transmit data, the storage medium stores program instructions executable by the processor, when the session management function entity runs, the processor communicates with the storage medium through the bus, and the processor executes the program instructions to perform the steps of the session residual processing method according to any one of the first aspect.
In a fourth aspect, an embodiment of the present application further provides a computer-readable storage medium, where a computer program is stored on the storage medium, and the computer program is executed by a processor to perform the steps of the session residual processing method according to any one of the first aspect.
The beneficial effect of this application is:
the application provides a method and a device for processing session residual, a session management functional entity and a storage medium, wherein the method comprises the following steps: sending an end-to-end status request message to a first satellite terminal, the end-to-end status request message comprising: the system comprises a state request identifier and a session identifier, wherein the state request identifier is used for requesting a tunnel state of an end-to-end session corresponding to the session identifier from a first satellite terminal; the end-to-end session is a communication session between the first satellite terminal and the second satellite terminal; receiving an end-to-end state response message sent by a first satellite terminal; determining the state of the end-to-end conversation according to the end-to-end state response message; and if the state of the end-to-end session is an abnormal state, initiating a hang-up flow aiming at the end-to-end session. According to the method and the device, the state request identification is carried in the end-to-end state request message sent to the first satellite terminal to request the state of the end-to-end session to the first satellite terminal, and the hang-up flow is initiated when the state of the end-to-end session is determined to be an abnormal state, so that the residual end-to-end session in the core network is effectively processed, the resources of the space base station are released, the core network cannot mistakenly report the existing end-to-end session when the satellite terminal initiates the next end-to-end session, and the normal establishment of the end-to-end session is ensured.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic diagram of a network architecture;
fig. 2 is a schematic diagram of two conventional communication service modes;
FIG. 3 is a schematic diagram of end-to-end communication of a satellite terminal;
FIG. 4 is a schematic diagram of another satellite terminal end-to-end communication;
fig. 5 is a schematic flowchart of a session residual processing method according to an embodiment of the present application;
fig. 6 is a schematic flowchart of another session residual processing method according to an embodiment of the present application;
fig. 7 is an interaction diagram of end-to-end session establishment provided in an embodiment of the present application;
fig. 8 is an interaction diagram of an end-to-end session hangup according to an embodiment of the present disclosure;
fig. 9 is an interaction diagram of two session exception determinations provided in the embodiment of the present application;
fig. 10 is a schematic structural diagram of a session residual processing apparatus according to an embodiment of the present application;
fig. 11 is a schematic structural diagram of a session management function entity according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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, but not all, embodiments of the present invention.
Thus, the following detailed description of the embodiments of the present application, as presented in the figures, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.
In the description of the present application, it should be noted that if the terms "upper", "lower", etc. are used for indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which is usually arranged when the product of the application is used, the description is only for convenience of describing the application and simplifying the description, but the indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation and operation, and thus, cannot be understood as the limitation of the application.
Furthermore, the terms "first," "second," and the like in the description and in the claims, as well as in the drawings, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It should be noted that the features of the embodiments of the present application may be combined with each other without conflict.
Before presenting the present application, to facilitate an understanding of the concepts of the present application, reference will first be made to the concepts related to the present application.
The mobile communication network applied in the technical solution of the present application is mainly various fifth generation (5 g) communication networks, and may also be applied to a new radio access technology (NR) in the future, which is not limited in the present application. Referring to fig. 1, a schematic diagram of a network architecture is shown in fig. 1, where the network architecture of the 5G communication network in the present application may specifically include the following network elements:
1. terminal Equipment (User Equipment, UE): and may also be referred to as user equipment, a terminal, an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent, or user equipment. The terminal device in the present application refers specifically to a satellite terminal device.
2. Access Network (AN): the method provides a network access function for authorized users in a specific area, and can use transmission tunnels with different qualities according to the level of the users, the requirements of services and the like. An Access Network that implements an Access Network function based on a wireless communication technology may be referred to as a Radio Access Network (RAN). The radio access network can manage radio resources, provide access service for the terminal, and further complete the forwarding of control signals and user data between the terminal and the core network.
3. Session Management Function (SMF) entity: the SM (session management) message termination point is mainly used for NAS (Non-Access Stratum) messages, and is used for establishing, modifying and releasing a session (session); user equipment IP allocation management, selection and control of UPF for a session, charging data collection and support of charging interfaces, downstream data indication, etc.
4. User Plane Function (UPF) entity: i.e. a data plane gateway. The method can be used for packet routing and forwarding, or quality of service (QoS) processing of user plane data, and the like. The user data may be accessed to a Data Network (DN) through the network element.
5. Access and mobility management function (AMF) entity: the present invention is mainly used for mobility management, access management, and the like, and may be used to implement other functions, such as functions of lawful interception, or access authorization (or authentication), and the like, in addition to session management in Mobility Management Entity (MME) functions. In the embodiment of the present application, the method and the device can be used for implementing the functions of the access and mobility management network element.
6. A Universal Data Management (UDM) entity, the UDM including registration information of the UE, the UDM querying user subscription information from a Unified Data Repository (UDR), the UDM and the UDR being a front end and a back end in the 5G communication network, respectively. When the subscription information related to the UE on the UDM changes, the SMF may be notified to initiate a pdu session modification, or the SMF may register the information that the UE connects to this SMF on the UDM. The UDM can query which SMF the UE is currently on through the UE's identity.
7. A Network Repository Function (NRF) entity, when the UDM registers to the NRF, the UDM registers all UE registration information on the UDM to the NRF, and the NRFs have an inter-query interface, so as to query the UDM information to which the UE belongs through the NRF.
It should be understood that the network architecture applied to the embodiments of the present application is only an exemplary network architecture described in terms of a conventional point-to-point architecture and a service architecture, and the network architecture to which the embodiments of the present application are applied is not limited thereto, and any network architecture capable of implementing the functions of the network elements described above is applicable to the embodiments of the present application. It should be understood that the above network elements may communicate with each other through a preset interface, which is not described herein again. It is also to be understood that SMF entities, UPF entities, AMF entities, UDM entities, NRF entities may be understood as network elements in a core network for implementing different functions, e.g. may be combined into network slices as required. The core network elements may be independent devices, or may be integrated in the same device to implement different functions, which is not limited in this application.
Referring to fig. 2, a schematic diagram of two conventional communication service modes is shown, as shown in fig. 2, a mobile broadband system supports two communication service modes, that is: end-to-network communication traffic pattern, end-to-end communication traffic pattern. In the terminal-network communication service mode, a user accesses the Internet or other networks through a satellite terminal, a space segment system and a ground segment system; in the end-end communication service mode, a user directly interacts information with the space segment system through the satellite terminal, and information flow does not need to pass through the ground segment system. However, both communication service modes require ground segment system control, and the access authentication, connection management, mobility management and other processes all require ground segment equipment to participate.
Referring to fig. 3, a schematic diagram of end-to-end communication of satellite terminals is shown in fig. 3, where a plurality of satellite terminals reside in the same satellite, and the end-to-end communication is data interaction through the same spatial base station. Referring to fig. 4, a schematic diagram of another satellite terminal end-to-end communication is shown, as shown in fig. 4, a plurality of satellite terminals reside in different satellites, and the end-to-end communication is that different space base stations perform data interaction through respective space routers.
The core content of two satellite terminals for realizing end-to-end communication is that user plane data directly completes data interaction between space base stations without passing through a core network, which requires that the core network indicates the space base stations to route and forward the user plane data when a call is established and the call is hung up.
Based on the above description, the following detailed descriptions are provided for specific embodiments of the session residual processing method, the session residual processing device, the session management functional entity, and the storage medium provided in the present application.
Referring to fig. 5, a schematic flow chart of a session residual processing method provided in the embodiment of the present application is shown, as shown in fig. 5, the method includes:
s20: sending an end-to-end status request message to a first satellite terminal, the end-to-end status request message comprising: the state request identifier is used for requesting the state of an end-to-end session corresponding to the session identifier from the first satellite terminal; the end-to-end session is a communication session between the first satellite terminal and the second satellite terminal.
In this embodiment, the peer-to-peer Status Request message (P2P Status Request) is a pre-designed NAS (Non-Access Stratum) message, and the peer-to-peer Status response message is a pair of NAS messages, where the peer-to-peer Status Request message includes a plurality of information elements, and for example, may at least include: the system comprises a state Request identifier and a session identifier, wherein the state Request identifier is an end-to-end session Request message identifier (P2P Status Request message identity), and the first SMF carries the end-to-end session Request message identifier in an end-to-end state Request message so as to Request a state of an end-to-end session corresponding to the session identifier from a first satellite terminal; the session identifier is an end-to-end session identifier (PDU session ID) to be determined whether a session residue exists, and the end-to-end session is a communication session established between the first satellite terminal and the second satellite terminal through the first space base station and the second space base station.
In an optional embodiment, table 1 provides a format of an end-to-end status request message provided in this embodiment, and as shown in table 1, an Information Element Identity (IEI) of the end-to-end status request message includes: information Element (Information Element), type or Reference protocol (Type/Reference) of the Information Element, necessity (Presence) of the Information Element, format (Format) of the Information Element, and Length (Length) of the Information Element. Wherein the content of the first and second substances, the information element includes: extended Protocol Discriminator (EPD), PDU Session identification (PDU Session ID), procedure Transaction Identification (PTI), and end-to-end Session request message identification.
Specifically, the first eight bits of each NAS message are an extended protocol discriminator used for indicating the type of the third layer signaling protocol, the second eight bit of the NAS message includes a PDU session identifier used for indicating whether an end-to-end session remaining in the session exists or not, the third eight bit of the NAS message includes a process transaction identifier used for indicating a transaction corresponding to the end-to-end status request message, if multiple messages have the same process transaction identifier, the multiple messages are identified to be interactive for the same transaction, and the fourth eight bit of the NAS message includes an end-to-end session request message identifier added in this embodiment. For example, the types or reference formats of the extension protocol discriminator, the PDU session identifier, and the process transaction identifier may be defined in 3gpp TS 24.007, for example, the extension protocol discriminator may be an extension protocol discriminator 9.2, the PDU session identifier may be a PDU session identifier 9.4, and the process transaction identifier may be a process transaction identifier 9.6, which is not limited in this application, but the new end-to-end session request message identifier of this embodiment is a new message type, which needs to be distinguished from 3gpp TS 245801.7.
The necessity is for indicating whether an information element is necessary contents in the end-to-end state request message, where Must (M) is the necessary contents and Optional (O) is the unnecessary contents. The format is used to indicate a format Type of the content of the information element in the end-to-end status request message, where V (Value) denotes a Value for indicating the information element, T (Type) denotes a Type for indicating the information element, and TV (Type + Value) denotes a Type and a Value for indicating the information element.
Table 1 format of end-to-end status request message
Figure BDA0003722164970000091
Figure BDA0003722164970000101
S30: and receiving an end-to-end state response message sent by the first satellite terminal.
In this embodiment, a first satellite terminal receives an end-to-end state request message sent by a first SMF, determines a state of an end-to-end session to be queried according to a state request identifier in the end-to-end state request message, determines the end-to-end session to be queried according to a session identifier, and sends an end-to-end state Response message (P2P Status Response) to the first SMF after determining the state of the end-to-end session corresponding to the session identifier, where the end-to-end state Response message is a Response to the end-to-end state request message.
S40: and determining the state of the end-to-end session according to the end-to-end state response message.
In this embodiment, the first SMF determines the state of the peer-to-peer session according to the content included in the peer-to-peer state response message, determines that the state of the peer-to-peer session recorded in the first SMF is not synchronized with the state of the peer-to-peer session recorded in the first satellite terminal, and determines whether the peer-to-peer session is in an abnormal state or a normal state.
In an optional embodiment, if the content included in the end-to-end status response message does not include the predefined abnormal content, it is determined that the end-to-end session is in the normal state, and if the content included in the end-to-end status response message includes the predefined abnormal content, it is determined that the end-to-end session is in the abnormal state.
S50: and if the state of the end-to-end session is an abnormal state, initiating a hang-up flow aiming at the end-to-end session.
In this embodiment, after determining that the end-to-end session is in an abnormal state, the first SMF initiates a hangup procedure for the end-to-end session, and based on the hangup procedure, the first SMF deletes the remaining session information and sends a resource release request to the first space base station, so that the first space base station releases the space base station resources occupied by the end-to-end session based on the resource release request.
In an optional embodiment, since the end-to-end session is a communication session performed between the first satellite terminal and the second satellite terminal, when the first SMF performs the processes of S20 to S50 to determine whether there is an end-to-end session residue in the first SMF, the second SMF in the core network where the second satellite terminal is located may also perform the same process as that of S20 to S50 to determine whether there is an end-to-end session residue in the second SMF, and when there is an end-to-end session residue, the second SMF also initiates a hang-up procedure, deletes the remaining session information, and sends a resource release request to the second spatial base station, so that the second spatial base station releases spatial base station resources occupied by the end-to-end session based on the resource release request.
After the first SMF and the second SMF delete the residual session information, if the first satellite terminal and the second satellite terminal need to communicate again, the first satellite terminal or the second satellite terminal may initiate an end-to-end call request, and the other satellite terminal responds to the end-to-end call request to re-establish an end-to-end session, so as to avoid that the first SMF and the second SMF consider that an end-to-end session already exists between the first satellite terminal and the second satellite terminal because of the previous session residue, so that a new end-to-end session cannot be established, and the first SMF and the second SMF report that an end-to-end session already exists to the first satellite terminal and the second satellite terminal, but the first satellite terminal and the second satellite terminal cannot communicate through the end-to-end session between the first satellite terminal and the second satellite terminal because of the previous end-to-end session is abnormal, so that the communication is abnormal.
The session residual processing method provided by the above embodiment includes: sending an end-to-end status request message to a first satellite terminal, the end-to-end status request message comprising: the system comprises a state request identifier and a session identifier, wherein the state request identifier is used for requesting a tunnel state of an end-to-end session corresponding to the session identifier from a first satellite terminal; the end-to-end session is a communication session between the first satellite terminal and the second satellite terminal; receiving an end-to-end state response message sent by a first satellite terminal; determining the state of the end-to-end conversation according to the end-to-end state response message; and if the state of the end-to-end session is an abnormal state, initiating a hang-up flow aiming at the end-to-end session. In the embodiment, the state request identifier is carried in the end-to-end state request message sent to the first satellite terminal, so as to request the state of the end-to-end session from the first satellite terminal, and a hang-up flow is initiated when the end-to-end session state is determined to be an abnormal state, so that the end-to-end session remained in a core network is effectively processed, and the resources of the space base station are released; and the core network can not falsely report the existing end-to-end session when the first satellite terminal initiates the next end-to-end session, so that the normal establishment of a new end-to-end session is ensured, and the first satellite terminal and the second satellite terminal can normally communicate through the new end-to-end session.
On the basis of the foregoing embodiment, the embodiment of the present application further provides another session residual processing method. Referring to fig. 6, which is a flowchart illustrating another session residual processing method according to an embodiment of the present invention, as shown in fig. 6, before sending an end-to-end state request message to a first satellite terminal in S20, the method further includes:
s11: receiving an end-to-end call request from a first satellite terminal forwarded by a first spatial base station and an identification of the first spatial base station, the end-to-end call request comprising: an identification of the second satellite terminal.
In this embodiment, each satellite terminal has a unique identifier, and when the first satellite terminal needs to communicate with the second satellite terminal, it needs to send an end-to-end call request to the second satellite terminal based on the identifier of the second satellite terminal. Specifically, a user sends an end-to-end call request through a first satellite terminal, where the end-to-end call request at least includes: and the identification of the second satellite terminal, namely the end-to-end call request is used for instructing the first satellite terminal to call the second satellite terminal for communication. The identification of the second satellite terminal may be, for example, a Mobile subscriber number (MSISDN) of the second satellite terminal.
The identifier of the first space base station is a tunnel identifier of the first space base station, and the tunnel is formed after the PDU session is established between the first satellite terminal and the core network. For example, the tunnel may be a tunnel established based on GTP (GPRS tunneling Protocol) or a tunnel established based on GSE (general stream en.
S12: and inquiring a second SMF in which the second satellite terminal is positioned according to the identification of the second satellite terminal.
Specifically, when the satellite terminal is registered to the core network of the home location, the SMF where the satellite terminal is located is queried in the core network of the home location. In this embodiment, after receiving the identifier of the second satellite terminal, the first SMF, according to the identifier of the second satellite terminal, and inquiring a second SMF of the second satellite terminal from the core network of the home of the second satellite terminal.
S13: the end-to-end call request and the identification of the first spatial base station are forwarded to the second SMF such that the second SMF notifies the second satellite terminal to respond to the end-to-end call request and transmits the identification of the first spatial base station to the second spatial base station of the second satellite terminal.
In this embodiment, after determining the second SMF, the first SMF forwards the end-to-end call request and the identifier of the first space base station to the second SMF, the second SMF receives the end-to-end call request and the identifier of the first space base station, and sends the end-to-end call request to the second satellite terminal according to the identifier of the second satellite terminal in the end-to-end call request, when the second SMF receives a response from the second satellite terminal to the end-to-end call request, the identifier of the first space base station is sent to the second space base station where the second satellite terminal resides, and after receiving the identifier of the first space base station, the second space base station sends its identifier to the second SMF.
S14: receiving an end-to-end response message sent by the second SMF, wherein the end-to-end response message comprises: an end-to-end call response and an identification of the second spatial base station.
In this embodiment, the first SMF receives an end-to-end response message sent by the second SMF, where the end-to-end response message at least includes: the second satellite terminal sends an end-to-end call response based on the end-to-end call request and an identification of the second spatial base station.
S15: the identification of the second spatial base station is transmitted to the first spatial base station such that the first spatial base station and the second spatial base station establish an end-to-end session between the first satellite terminal and the second satellite terminal based on the respective identifications.
In this embodiment, the first SMF sends the identifier of the second space base station to the first space base station, so that the first space base station and the second space base station establish an end-to-end session for the satellite communication between the first satellite terminal and the second satellite terminal based on their respective identifiers, and the first SMF also sends an end-to-end call response to the first satellite terminal to indicate that the call establishment of the first satellite terminal is successful, so as to enable end-to-end communication with the second satellite terminal.
S20: and sending an end-to-end state request message to the first satellite terminal.
S30: and receiving an end-to-end state response message sent by the first satellite terminal.
S40: and determining the state of the end-to-end session according to the end-to-end state response message.
S50: and if the state of the end-to-end session is an abnormal state, initiating a hang-up flow aiming at the end-to-end session.
After the end-to-end session between the first satellite terminal and the second satellite terminal is established by adopting the processes of S11 to S15, the first SMF and the second SMF respectively execute the processes of S20 to S50, determine whether the end-to-end session between the first satellite terminal and the first SMF and the end-to-end session between the second satellite terminal and the second SMF are in an abnormal state, and when the sessions are in the abnormal state, the first SMF and the second SMF respectively initiate a session hangup procedure, delete the respective residual session information, and respectively send resource release requests to the first space base station and the second space base station, so that the first space base station and the second space base station respectively release the space base station resources occupied by the end-to-end session based on the resource release requests.
For example, please refer to fig. 7, which is an interaction diagram of end-to-end session establishment provided in the embodiment of the present application, and as shown in fig. 7, the process includes:
s101: the first satellite terminal sends a peer-to-peer call request (P2 pcallying Req) to the first SMF.
S102: the first SMF queries the second SMF in the NRF and UDM according to the MSISDN of the second satellite terminal.
S103: the first SMF forwards the end-to-end call request (P2P Calling Req) and the tunnel identification of the first spatial base station to the second SMF.
S104: the second SMF sends a peer-to-peer call request (P2P Calling Req) to the second satellite terminal.
S105: the second satellite terminal sends a peer-to-peer call response (P2P Calling Resp) to the second SMF.
S106: and the second SMF sends a PDU Resource modification request (PDU Resource modification Req) to the second space base station, wherein the PDU session Resource modification request comprises the tunnel identification of the first space base station.
S107: and the second space base station sends a PDU Resource modification response (PDU Resource modification Resp) to the second SMF, wherein the PDU session Resource modification response comprises the tunnel identification of the second space base station.
S108: and the second SMF replies to the first SMF to send an end-to-end call response (P2P Calling Resp) and the tunnel identifier of the second space base station.
S109: the first SMF sends an N1N2 message to the first space base station, wherein the N1N2 message comprises a P2P Calling Resp and a PDU Resource modification request (PDU Resource modification Req), and the PDU session Resource modification request comprises a tunnel identifier of the second space base station.
S110: and the first space base station sends a PDU Resource modification response (PDU Resource modification Resp) to the first AMF.
S111: the first space base station sends an end-to-end call response (P2P Calling Resp) to the first satellite terminal.
In the method for processing session residues provided in the foregoing embodiment, after sending the end-to-end state request message to the first satellite terminal, the end-to-end session between the first satellite terminal and the second satellite terminal is established first, and then it is determined whether the end-to-end session between the first satellite terminal and the second satellite terminal is abnormal, and when it is determined that the end-to-end session is in an abnormal state, a hang-up procedure is initiated, so that the end-to-end session remaining in the core network is effectively processed, and resources of the space base station are released; and the core network can not misreport the existing end-to-end session when the first satellite terminal initiates the next end-to-end session, so that the normal establishment of a new end-to-end session is ensured, and the first satellite terminal and the second satellite terminal can normally communicate through the new end-to-end session.
In an optional embodiment, the determining, in S40, the state of the end-to-end session according to the end-to-end state response message includes:
if the end-to-end status reply message only includes: and the state response identifier determines that the state of the end-to-end session is a normal state.
In this embodiment, the Status Response identifier is an end-to-end session Response message identifier (P2P Status Response message identifier), and the Status Response identifier is a Response of the first satellite terminal to the end-to-end Status request message. And the first SMF analyzes the end-to-end state response message, determines the content contained in the end-to-end state response message, and determines whether the end-to-end state response message contains predefined abnormal content or not according to the content contained in the end-to-end state response message. If the end-to-end status response message only includes: and if the state response identifier is identified, determining that the state of the end-to-end session is a normal state.
In another optional embodiment, the determining, in S40, the state of the end-to-end session according to the end-to-end state response message includes:
if the end-to-end status response message includes: and determining the state of the end-to-end session to be an abnormal state by the state response identification and the end-to-end state information.
In this embodiment, the pre-corresponding abnormal content is end-to-end state information, the end-to-end state information is used to indicate abnormal information of the end-to-end session, and if the end-to-end state response message includes not only the state response identifier but also the end-to-end state information, it is determined that the state of the end-to-end session is an abnormal state.
In an optional embodiment, table 2 provides a format of an end-to-end status response message for this embodiment, as shown in table 2, an information element of the end-to-end status response message includes: the system comprises an extended protocol discriminator, a PDU session identification, a process transaction identification, an end-to-end session response message identification and end-to-end state information (P2P Status), wherein the end-to-end state information is unnecessary content (O), and the format type of the content of the end-to-end state information is TV for indicating the type and the value of the end-to-end state information.
Table 2 format of end-to-end status response message
Figure BDA0003722164970000151
Figure BDA0003722164970000161
The session residual processing method provided in the foregoing embodiment determines, according to the content in the end-to-end state response message, whether the state of the end-to-end session is a normal state or an abnormal state, where if the end-to-end state response message only includes: and the state response identifier determines that the state of the end-to-end session is a normal state, and if the end-to-end state response message comprises: and determining the state of the end-to-end conversation to be an abnormal state by the state response identifier and the end-to-end state information. The embodiment can quickly determine the state of the end-to-end session by judging the state response message of the opposite end and the opposite end, so as to initiate a hang-up flow when the state of the end-to-end session is determined to be an abnormal state, thereby effectively processing the residual end-to-end session in the core network and releasing the resources of the space base station; and the core network can not falsely report the existing end-to-end session when the first satellite terminal initiates the next end-to-end session, so that the normal establishment of a new end-to-end session is ensured, and the first satellite terminal and the second satellite terminal can normally communicate through the new end-to-end session.
Furthermore, after determining that the end-to-end session is in an abnormal state, the embodiment of the present application further provides a method for determining a cause of the abnormal state. Specifically, the method further comprises:
and determining the reason of the abnormal state of the end-to-end session according to the state value of the end-to-end state information.
In this embodiment, the first SMF defines in advance a correspondence between a plurality of preset state values of the end-to-end state information and causes of a plurality of abnormal states, and after the end-to-end state response message is analyzed and the end-to-end state information is determined, the cause of the abnormal state in which the end-to-end session is located is determined according to the state values of the end-to-end state information and the correspondence between the plurality of preset state values and the causes of the plurality of abnormal states.
For example, before explaining the reason of the abnormal state according to the embodiment of the present application in detail, a process of hanging up an end-to-end session is explained. Referring to fig. 8, an interaction diagram of hanging up an end-to-end session provided in the embodiment of the present application is shown in fig. 8, where the process includes:
s201: the first satellite terminal sends an end-to-end-to-end hangup request (P2P Destroy Req) to the first SMF.
S202: the first SMF queries the second SMF in the NRF and UDM according to the MSISDN of the second satellite terminal.
S203: the first SMF forwards an end-to-end hangup request (P2P Destroy Req) to the second SMF.
S204: the second SMF sends an end-to-end hangup request (P2P Destroy Req) to the second satellite terminal.
S205: the second satellite terminal sends an end-to-end hangup response (P2P Destroy Resp) to the second SMF.
S206: the second SMF sends a PDU Resource Release request (PDU Resource Release Req) to the second space base station.
S207: and the second space base station sends a PDU Resource Release response (PDU Session Resource Release Resp) to the second SMF.
S208: the second MF replies to the first SMF that the second side hangup was successful (200 OK).
S209: the first SMF sends an end-to-end hangup response (P2P Destroy Resp) and a PDU Resource Release request (PDU Resource Release Req) to the first space base station.
S210: the first space base station transmits an end-to-end call response (P2P restriction Resp) to the first satellite terminal.
S211: and the first space base station sends a PDU Resource Release response (PDU Session Resource Release Resp) to the first AMF.
In an optional embodiment, the determining, according to the state value of the end-to-end state information, the cause of the abnormal state of the end-to-end session may include:
if the state value of the end-to-end state information is a first preset state value, determining the reason of the abnormal state as follows: hang up abnormally.
In this embodiment, if the state value of the end-to-end state information is the first preset state value, according to the correspondence between the multiple preset state values and the multiple abnormal states, it is determined that the reason of the abnormal state corresponding to the first preset state value is: hang up abnormally. Wherein the hang-up exception is: after the first satellite terminal initiates a hang-up request as a master hang-up satellite terminal, the first SMF makes an error when processing the hang-up request, which causes an abnormal interruption of the hang-up flow, in this case, the state of the end-to-end session recorded by the first satellite terminal is hung up, but the state of the end-to-end session recorded by the first SMF is not hung up, that is, the state of the end-to-end session recorded by the first SMF is not synchronized with the state of the end-to-end session recorded by the first satellite terminal, and the reason for determining the abnormal state is: hang up abnormally.
Furthermore, the first SMF pre-defines a correspondence between a plurality of preset state values of the end-to-end state information and a plurality of states of the end-to-end session, and determines, according to the correspondence between the plurality of preset state values and the plurality of states of the end-to-end session, that the state of the end-to-end session corresponding to the first preset state value is: the terminal side is hung up, but the state of the end-to-end session recorded by the first SMF is not hung up, and the reason for determining the abnormal state is as follows: hang up the exception.
In another optional embodiment, the determining, according to the state value of the end-to-end state information, the cause of the abnormal state of the end-to-end session may include:
if the state value of the end-to-end state information is a second preset state value, determining the reason of the abnormal state as follows: the communication is abnormal.
In this embodiment, if the state value of the end-to-end state information is the second preset state value, according to the correspondence between the multiple preset state values and the multiple abnormal states, it is determined that the reason for the abnormal state corresponding to the second preset state value is: the communication is abnormal. Wherein, the communication abnormity is: after the second satellite terminal is used as a main hanging satellite terminal to initiate a hanging-up request, the second SMF sends an error when processing the hanging-up request, so that the hanging-up flow is abnormally interrupted. Therefore, after receiving the end-to-end state request message sent by the first SMF, the first satellite terminal sends an end-to-end state response message to the first SMF, where the end-to-end state response message carries end-to-end state information whose state value is a second preset state value, and when the first SMF determines that the state value of the end-to-end state information is the second preset state value, the reason for the abnormal state is determined as follows: the communication is abnormal.
It should be noted that, after the first satellite terminal initiates the hangup request as the master hangup satellite terminal, the first SMF sends an error when processing the hangup request, so that the hangup flow is abnormally interrupted, in this case, the cause of the abnormal state of the end-to-end session between the first satellite terminal and the first SMF is the hangup abnormality, and the cause of the abnormal state of the end-to-end session between the second satellite terminal and the second SMF is the communication abnormality. Similarly, when the second satellite terminal initiates a hangup request as a master hangup satellite terminal, the second SMF sends an error when processing the hangup request, which causes an abnormal interruption of the hangup process.
In an optional embodiment, if the first SMF does not receive the corresponding end-to-end status response message when sending the end-to-end status request message to the first satellite terminal for multiple times within a preset time, it is determined that the first satellite terminal is off-line, and the first SMF also initiates a hang-up procedure for the end-to-end session. In case of a first satellite terminal being off-line, the reason for the abnormal state of the end-to-end session between the second satellite terminal and the second SMF is: the communication is abnormal.
For example, table 3 provides a format of end-to-end Status information for the present embodiment, as shown in table 3, where a first byte octet1 is used to store an information element identifier (P2P Status IEI) of the end-to-end Status information, specifically, a format (TV) for storing the end-to-end Status information, and a second byte octet2 is used to store a Status Value (P2P Status Value) which is an integer of 8 bits, and indicates different statuses of the end-to-end session according to different Status values, where the different statuses are used to indicate reasons of abnormal statuses.
Table 3 format of end-to-end state information
octet1 P2P Status IEI
octet2 P2P Status Value
For example, please refer to fig. 9, which is an interaction schematic diagram of two session exception determinations provided in the embodiment of the present application, and as shown in fig. 9, an interaction process of session exception determination includes:
s301: the first SMF sends a peer state Request message (P2P Status Request) to the first satellite terminal at regular time.
S302: the first satellite terminal sends a peer Status Response message (P2P Status Response) to the first SMF.
As shown in fig. 9, another interactive process for determining a session anomaly includes:
s303: the first SMF sends a first peer-to-peer Status Request message (P2P Status Request) to the first satellite terminal.
S304: the first SMF sends a second peer-to-peer Status Request message (P2P Status Request) to the first satellite terminal.
S305: the first SMF sends a third peer-to-peer Status Request message (P2P Status Request) to the first satellite terminal.
S306: a hang-up flow for the end-to-end session is initiated.
The session residual processing method provided in the foregoing embodiment may determine, according to the state value of the end-to-end state information, a cause of an abnormal state in which the end-to-end session is located, and if the state value of the end-to-end state information is a first preset state value, determine that the cause of the abnormal state is: and hanging up the abnormal state, if the state value of the end-to-end state information is a second preset state value, determining the reason of the abnormal state as follows: the communication is abnormal. The embodiment can accurately judge the reason causing the abnormal state of the end-to-end conversation so as to check the abnormal problem and ensure the subsequent normal communication.
On the basis of the foregoing embodiment, an apparatus for processing session residuals is further provided in the embodiments of the present application. Referring to fig. 10, a schematic structural diagram of a session residual processing apparatus according to an embodiment of the present application is shown in fig. 10, where the apparatus includes:
a sending module 10, configured to send an end-to-end status request message to a first satellite terminal, where the end-to-end status request message includes: the system comprises a state request identifier and a session identifier, wherein the state request identifier is used for requesting a tunnel state of an end-to-end session corresponding to the session identifier from a first satellite terminal; the end-to-end session is a communication session between the first satellite terminal and the second satellite terminal;
a receiving module 20, configured to receive an end-to-end status response message sent by a first satellite terminal;
a state determining module 30, configured to determine a state of an end-to-end session according to the end-to-end state response message;
and a hang-up initiating module 40, configured to initiate a hang-up procedure for the end-to-end session if the state of the end-to-end session is an abnormal state.
Optionally, the apparatus further comprises: a query module;
the receiving module 20 is further configured to receive an end-to-end call request from the first satellite terminal and an identifier of the first spatial base station, where the end-to-end call request includes: an identity of the second satellite terminal;
the query module is used for querying a second SMF where the second satellite terminal is located according to the identifier of the second satellite terminal;
a sending module 10, configured to forward the end-to-end call request and the identifier of the first spatial base station to the second SMF, so that the second SMF notifies the second satellite terminal to respond to the end-to-end call request, and sends the identifier of the first spatial base station to the second spatial base station of the second satellite terminal;
the receiving module 20 is further configured to receive an end-to-end response message sent by the second SMF, where the end-to-end response message includes: an end-to-end call response and an identification of the second spatial base station;
the sending module 10 is further configured to send an identifier of the second spatial base station to the first spatial base station, so that the first spatial base station and the second spatial base station establish an end-to-end session between the first satellite terminal and the second satellite terminal based on the respective identifiers.
Optionally, the status determining module 30 is specifically configured to, if the end-to-end status response message only includes: and the state response identifier determines that the state of the end-to-end session is a normal state.
Optionally, the status determining module 30 is further configured to, if the end-to-end status response message includes: and determining the state of the end-to-end session to be an abnormal state by the state response identification and the end-to-end state information.
Optionally, the apparatus further comprises:
and the abnormal reason determining module is used for determining the reason of the abnormal state of the end-to-end conversation according to the state value of the end-to-end state information.
Optionally, the abnormal cause determining module is specifically configured to determine, if the state value of the end-to-end state information is the first preset state value, that the cause of the abnormal state is: hang up the exception.
Optionally, the abnormal cause determining module is further configured to determine, if the state value of the end-to-end state information is a second preset state value, that the cause of the abnormal state is: the communication is abnormal.
The above-mentioned apparatus is used for executing the method provided by the foregoing embodiment, and the implementation principle and technical effect are similar, which are not described herein again.
These above modules may be one or more integrated circuits configured to implement the above methods, such as: one or more Application Specific Integrated Circuits (ASICs), or one or more microprocessors, or one or more Field Programmable Gate Arrays (FPGAs), etc. For another example, when one of the above modules is implemented in the form of a Processing element scheduler code, the Processing element may be a general-purpose processor, such as a Central Processing Unit (CPU) or other processor capable of calling program code. For another example, these modules may be integrated together and implemented in the form of a system-on-a-chip (SOC).
Referring to fig. 11, a schematic structural diagram of a session management functional entity according to an embodiment of the present application is shown in fig. 11, where the session management functional entity 100 includes: the session management function entity comprises a transceiver 101, a processor 102, a storage medium 103 and a bus, wherein the transceiver 101 is used for receiving and transmitting data, the storage medium stores program instructions executable by the processor 102, when the session management function entity 100 runs, the processor 102 communicates with the storage medium 103 through the bus, and the processor 102 executes the program instructions to execute the steps of the session residual processing method in any one of the above embodiments. The specific implementation and technical effects are similar, and are not described herein again.
Optionally, the invention also provides a program product, for example a computer-readable storage medium, comprising a program which, when being executed by a processor, is adapted to carry out the above-mentioned method embodiments.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
The integrated unit implemented in the form of a software functional unit may be stored in a computer-readable storage medium. The software functional unit is stored in a storage medium and includes several instructions to enable a computer device (which may be a personal computer, a server, or a network device) or a processor (processor) to execute some steps of the methods according to the embodiments of the present invention. And the aforementioned storage medium includes: a U disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and shall cover the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. A method for processing session residuals, the method comprising:
sending an end-to-end state request message to a first satellite terminal, wherein the end-to-end state request message comprises: the state request identifier is used for requesting the state of an end-to-end session corresponding to the session identifier from the first satellite terminal; the end-to-end session is a communication session between the first satellite terminal and a second satellite terminal;
receiving an end-to-end state response message sent by the first satellite terminal;
determining the state of the end-to-end session according to the end-to-end state response message;
and if the state of the end-to-end session is an abnormal state, initiating a hang-up flow aiming at the end-to-end session.
2. The method of claim 1, wherein prior to sending the end-to-end status request message to the first satellite terminal, the method further comprises:
receiving an end-to-end call request forwarded by a first spatial base station from the first satellite terminal and an identification of the first spatial base station, the end-to-end call request comprising: an identity of the second satellite terminal;
inquiring a second SMF of the second satellite terminal according to the identifier of the second satellite terminal;
forwarding the end-to-end call request and the identification of the first spatial base station to the second SMF, so that the second SMF informs the second satellite terminal to respond to the end-to-end call request, and sends the identification of the first spatial base station to a second spatial base station of the second satellite terminal;
receiving an end-to-end response message sent by the second SMF, wherein the end-to-end response message comprises: an end-to-end call response and an identification of the second spatial base station;
transmitting the identification of the second spatial base station to the first spatial base station to enable the first spatial base station and the second spatial base station to establish an end-to-end session between the first satellite terminal and the second satellite terminal based on the respective identifications.
3. The method of claim 1, wherein said determining the state of the end-to-end session based on the end-to-end state reply message comprises:
if the end-to-end status response message only includes: and the state response identifier determines that the state of the end-to-end session is a normal state.
4. The method of claim 1, wherein said determining a status of said end-to-end session based on said end-to-end status reply message, further comprises:
if the end-to-end status response message includes: and determining the state of the end-to-end session to be an abnormal state by using the state response identifier and the end-to-end state information.
5. The method of claim 4, wherein the method further comprises:
and determining the reason of the abnormal state of the end-to-end session according to the state value of the end-to-end state information.
6. The method of claim 5, wherein the determining a cause of the abnormal state of the end-to-end session according to the state value of the end-to-end state information comprises:
if the state value of the end-to-end state information is a first preset state value, determining that the reason of the abnormal state is as follows: hang up the exception.
7. The method of claim 5, wherein the determining the cause of the abnormal state of the end-to-end session according to the state value of the end-to-end state information comprises:
if the state value of the end-to-end state information is a second preset state value, determining that the reason of the abnormal state is as follows: the communication is abnormal.
8. A session residual processing apparatus, characterized in that the apparatus comprises:
a sending module, configured to send an end-to-end status request message to a first satellite terminal, where the end-to-end status request message includes: the state request identifier is used for requesting the first satellite terminal for the tunnel state of the end-to-end session corresponding to the session identifier; the end-to-end session is a communication session between the first satellite terminal and a second satellite terminal;
a receiving module, configured to receive an end-to-end status response message sent by the first satellite terminal;
a state determining module, configured to determine a state of the end-to-end session according to the end-to-end state response message;
and the hang-up initiating module is used for initiating a hang-up flow aiming at the end-to-end session if the state of the end-to-end session is an abnormal state.
9. A session management function entity, comprising: a transceiver for receiving and transmitting data, a processor, a storage medium and a bus, wherein the storage medium stores program instructions executable by the processor, and when the session management function entity is running, the processor communicates with the storage medium through the bus, and the processor executes the program instructions to perform the steps of the session residual processing method according to any one of claims 1 to 7.
10. A computer-readable storage medium, characterized in that a computer program is stored on the storage medium, which computer program, when being executed by a processor, performs the steps of the method for processing session residuals according to any of the claims 1 to 7.
CN202210766054.3A 2022-06-30 2022-06-30 Session residue processing method, device, session management functional entity and storage medium Active CN115150870B (en)

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