CN114071790A - Communication method, device, equipment and storage medium - Google Patents

Communication method, device, equipment and storage medium Download PDF

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Publication number
CN114071790A
CN114071790A CN202111547172.7A CN202111547172A CN114071790A CN 114071790 A CN114071790 A CN 114071790A CN 202111547172 A CN202111547172 A CN 202111547172A CN 114071790 A CN114071790 A CN 114071790A
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message
pdu session
terminal
network element
management policy
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CN114071790B (en
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任驰
马泽芳
马瑞涛
邢天齐
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China United Network Communications Group Co Ltd
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China United Network Communications Group Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/14—Session management
    • H04L67/141—Setup of application sessions
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/19—Connection re-establishment

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Telephonic Communication Services (AREA)
  • Computer And Data Communications (AREA)

Abstract

The application provides a communication method, a communication device, communication equipment and a storage medium, relates to the technical field of communication, realizes the management and control of an ATC function with a PDU session as a granularity, can improve the flexibility of ATC function application, and ensures the service experience of a user. The method comprises the following steps: under the condition that the connection management state of the terminal is in an idle state, a first network element receives a first message from a second network element, wherein the first message is used for indicating that a first Protocol Data Unit (PDU) session of the terminal receives downlink data, and the first message comprises the following information: data network information and/or network slice information corresponding to the first PDU session; the first network element determines a first management strategy corresponding to the first PDU session according to data network information and/or network slice information corresponding to the first PDU session, wherein the first management strategy is used for indicating whether the first PDU session enables an Asynchronous Type Communication (ATC) function; and the first network element initiates paging to the terminal according to the first management strategy.

Description

Communication method, device, equipment and storage medium
Technical Field
The present application relates to the field of communications technologies, and in particular, to a communication method, apparatus, device, and storage medium.
Background
The international telecommunication standards organization third generation partnership project (3 GPP) defines the Asynchronous Type Communication (ATC) technology for core network control in the 5th generation mobile communication (5G) system architecture. Under the condition that a Connection Management (CM) state of User Equipment (UE) is in an idle state, if a service request (service request) flow triggered by a network side occurs, an ATC technology supports a 5G core network (5G core network, 5GC) not to immediately initiate a paging (paging) UE flow, but to initiate processes of UE context synchronization, connection reestablishment of a Protocol Data Unit (PDU) session, and the like to the UE after a delay, thereby realizing efficient signaling load management.
For example: in the 5G system architecture, if the ATC function is applied, for a service request procedure triggered by a network side, if a connection management state of a UE in an access and mobility management function (AMF) is in an idle state, the AMF does not immediately initiate a paging procedure to the UE, and only after the connection management state of the UE is in a connected state, the AMF issues an update message to the UE, synchronizes context information of the UE, and indicates the UE to complete re-establishment of a PDU session connection.
In the current system definition, the configuration, activation, deactivation, and the like of the ATC are all completed locally in the AMF, and if the connection management state of the UE is in an idle state, the AMF cannot distinguish the specific behavior of triggering the service request under the condition of applying the ATC function, and can uniformly intercept all information issued to the UE. Therefore, for some important services (for example, services of chat software specially used for work) with PDU sessions as granularity, when the UE needs to be paged and downlink information (for example, downlink traffic information, downlink control information, etc.) is issued, the downlink information cannot be sent to the UE in time due to the application of the ATC function, which results in impaired user service experience.
Disclosure of Invention
The application provides a communication method, a communication device, communication equipment and a storage medium, which realize the management and control of an ATC function with a PDU session as a granularity, can improve the flexibility of ATC function application, and ensure the service experience of a user.
In order to achieve the purpose, the technical scheme is as follows:
in a first aspect, the present application provides a communication method, applied to a first network element, the method including: under the condition that the connection management state of the terminal is in an idle state, receiving a first message from a second network element, wherein the first message is used for indicating that a first Protocol Data Unit (PDU) session of the terminal receives downlink data, and the first message comprises the following information: data network information and/or network slice information corresponding to the first PDU session; determining a first management strategy corresponding to the first PDU session according to data network information and/or network slice information corresponding to the first PDU session, wherein the first management strategy is used for indicating whether the first PDU session enables an Asynchronous Type Communication (ATC) function; and initiating paging to the terminal according to the first management strategy.
Based on the technical scheme, the terminal can be paged according to the ATC strategy corresponding to each PDU session, the control of the ATC function with the PDU session as the granularity is realized, the flexibility of the application of the ATC function can be improved, and the service experience of a user is ensured.
In one possible design, prior to receiving the first message from the second network element, the method further includes: receiving a second message from the terminal, the second message being used for requesting to establish the first PDU session, the second message including the following information: the identity of the terminal, and data network information and/or network slice information corresponding to the first PDU session; and sending a third message to the second network element according to the second message, wherein the third message is used for requesting the first management strategy of the first PDU session, and the third message comprises the following information: the identity of the terminal, and data network information and/or network slice information corresponding to the first PDU session; and receiving a fourth message from the second network element, wherein the fourth message comprises a first management strategy, and the first management strategy is determined according to the identity of the terminal, the data network information and/or the network slice information corresponding to the first PDU session.
In one possible design, the first management policy indicates that the first PDU session does not enable ATC functionality; initiating paging to a terminal according to a first management policy, comprising: and sending a fifth message to the third network element, wherein the fifth message is used for indicating the third network element to immediately initiate paging to the terminal so as to complete the reestablishment of the first PDU session connection.
In one possible design, the first management policy indicates that the first PDU session enables the ATC function; initiating paging to a terminal according to a first management policy, comprising: and sending a sixth message to the third network element, wherein the sixth message is used for indicating the third network element to reestablish the connection of the first PDU session to the terminal after the connection management state of the terminal is in a connected state.
In one possible design, the fourth message further includes a second management policy of the second PDU session of the terminal, the second management policy being used to indicate whether the ATC function is enabled for the second PDU session.
In a second aspect, the present application provides a communication method, applied to a second network element, where the method includes: receiving a third message from the first network element, the third message being for requesting a first management policy of the first PDU session of the terminal, the third message including the following information: the identity of the terminal, and data network information and/or network slice information corresponding to the first PDU session; sending a fourth message to the first network element according to the third message, wherein the fourth message comprises a first management strategy, the first management strategy is used for indicating whether the first PDU session enables an ATC function, and the first management strategy is determined according to the identity of the terminal, and data network information and/or network slice information corresponding to the first PDU session; the fourth message is used for indicating the first network element to initiate paging to the terminal according to the first management strategy.
In one possible design, the fourth message further includes a second management policy of the second PDU session of the terminal, the second management policy being used to indicate whether the ATC function is enabled for the second PDU session.
In a third aspect, the present application provides a communication apparatus, applied to a first network element, including a communication unit and a processing unit; a communication unit, configured to receive a first message when a connection management state of a terminal is in an idle state, where the first message is used to indicate that a first protocol data unit PDU session of the terminal receives downlink data, and the first message includes the following information: data network information and/or network slice information corresponding to the first PDU session; the processing unit is used for determining a first management strategy corresponding to the first PDU session according to data network information and/or network slice information corresponding to the first PDU session, wherein the first management strategy is used for indicating whether the first PDU session enables an Asynchronous Type Communication (ATC) function or not; and the processing unit is also used for initiating paging to the terminal according to the first management strategy.
In one possible design, the communication unit is further configured to receive a second message from the terminal, where the second message is used to request establishment of the first PDU session, and the second message includes the following information: the identity of the terminal, and data network information and/or network slice information corresponding to the first PDU session; the processing unit is further configured to send a third message to the second network element according to the second message, where the third message is used to request the first management policy of the first PDU session, and the third message includes the following information: the identity of the terminal, and data network information and/or network slice information corresponding to the first PDU session; and the communication unit is further configured to receive a fourth message from the second network element, where the fourth message includes a first management policy, and the first management policy is determined according to the identity of the terminal, and the data network information and/or the network slice information corresponding to the first PDU session.
In one possible design, the first management policy indicates that the first PDU session does not enable ATC functionality; and the communication unit is specifically configured to send a fifth message to the third network element, where the fifth message is used to instruct the third network element to immediately initiate paging to the terminal, so as to complete reestablishment of the first PDU session connection.
In one possible design, the first management policy indicates that the first PDU session enables the ATC function; and the communication unit is specifically configured to send a sixth message to the third network element, where the sixth message is used to indicate the third network element to reestablish the connection of the first PDU session to the terminal after the connection management state of the terminal is in the connected state.
In one possible design, the fourth message further includes a second management policy of the second PDU session of the terminal, the second management policy being used to indicate whether the ATC function is enabled for the second PDU session.
In a fourth aspect, the present application provides a communication apparatus, applied to a second network element, including a communication unit and a processing unit; a communication unit, configured to receive a third message from the first network element, where the third message is used to request a first management policy of the first PDU session of the terminal, and the third message includes the following information: the identity of the terminal, and data network information and/or network slice information corresponding to the first PDU session; a processing unit, configured to send a fourth message to the first network element according to the third message, where the fourth message includes a first management policy, the first management policy is used to indicate whether the first PDU session enables an ATC function, and the first management policy is determined according to an identity of the terminal, and data network information and/or network slice information corresponding to the first PDU session; the fourth message is used for indicating the first network element to initiate paging to the terminal according to the first management strategy.
In one possible design, the fourth message further includes a second management policy of the second PDU session of the terminal, the second management policy being used to indicate whether the ATC function is enabled for the second PDU session.
In a fifth aspect, the present application provides a communication device, comprising: a processor, a communication interface, and a memory; the communication interface is for communicating with other devices, the memory is for storing one or more programs, the one or more programs include computer executable instructions, which when executed by the processor, cause the communication device to perform the method of the first or second aspect and any of the above-mentioned designs.
In a sixth aspect, the present application provides a computer-readable storage medium comprising computer-executable instructions that, when executed on a computer, cause the computer to perform the method of any of the first or second aspects and designs thereof.
In a seventh aspect, the present application provides a computer program product comprising a computer program which, when run on a computer, causes the computer to perform the method of any of the first or second aspects and designs thereof.
It should be noted that, for technical effects brought by any one of the designs in the second aspect to the seventh aspect, reference may be made to technical effects brought by corresponding designs in the first aspect, and details are not described here.
Drawings
Fig. 1 is a schematic architecture diagram of a 5G communication system according to an embodiment of the present application;
fig. 2 is a schematic architecture diagram of another 5G communication system according to an embodiment of the present application;
fig. 3 is a flowchart illustrating a communication method according to an embodiment of the present application;
fig. 4 is a flowchart illustrating another communication method according to an embodiment of the present application;
fig. 5 is a flowchart illustrating another communication method according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of a communication device according to an embodiment of the present application;
fig. 7 is a schematic structural diagram of another communication device according to an embodiment of the present application.
Detailed Description
In the description of this application, "/" means "or" unless otherwise stated, for example, A/B may mean A or B. "and/or" herein is merely an association describing an associated object, and means that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. Further, "at least one" means one or more, "a plurality" means two or more. The terms "first", "second", and the like do not necessarily limit the number and execution order, and the terms "first", "second", and the like do not necessarily limit the difference.
It is noted that, in the present application, words such as "exemplary" or "for example" are used to mean exemplary, illustrative, or descriptive. Any embodiment or design described herein as "exemplary" or "e.g.," is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.
The technical scheme provided by the embodiment of the application can be applied to various communication systems, such as: a New Radio (NR) communication system using a 5G communication technology, a future evolution system, or a multiple communication convergence system, and so on.
Fig. 1 is a schematic architecture diagram of a 5G communication system according to an embodiment of the present disclosure. As shown in fig. 1, the 5G communication system includes a next generation radio access network (NG-RAN) and a 5 GC.
The 5GC includes various core network devices, such as an AMF, a User Plane Function (UPF), a Session Management Function (SMF), and the like. The 5GC establishes a communication connection with the NG-RAN through the AMF and the UPF. The AMF may be used to provide processing functions for the control plane and the UPF may be used to provide processing functions for the user plane.
Note that the names of the core network devices are not limited to the functions thereof, and may be other names, which is not limited in the present application.
The access network includes access network equipment, such as: a 5G base station (next generation Node B, gNB), a 4G base station (not next generation evolved Node B, ng-eNB), and the like. In the communication system, interfaces, called Xn interfaces, exist between the gnbs, between the gnbs and the ng-enbs, and between the ng-enbs. An interface exists between the gNB and the 5GC, and is called an Ng interface.
Fig. 2 is an architecture diagram of another 5G communication system according to an embodiment of the present application. The communication system includes an access network (RAN) device, an UPF, an AMF, a Session Management Function (SMF), an authentication server Function (AUSF), a Network Slice Selection Function (NSSF), a network open Function (NEF), a network Function storage Function (NRF), a Policy Control Function (PCF), a Unified Data Management (UDM), an Application Function (AF), or a charging Function (CHF), and the like.
As shown in fig. 2, the terminal accesses the 5G network through the RAN device, and communicates with the AMF through an N1 interface; the RAN device communicates with the AMF over an N2 interface; the RAN device communicates with the UPF over an N3 interface; the SMF communicates with the UPF over an N4 interface, and the UPF accesses a Data Network (DN) over an N6 interface. In addition, the management plane functions shown in fig. 2, such as AUSF, AMF, SMF, NSSF, NEF, NRF, PCF, UDM, CHF, or AF, use a service interface for interaction. For example, the service interface provided by the AUSF is Nausf; the AMF provides a service interface Namf to the outside; the external service interface provided by the SMF is Nsmf, etc., and is not described one by one here.
Optionally, in this embodiment of the application, the terminal (terminal) may include various handheld devices, vehicle-mounted devices, wearable devices, User Equipment (UE), terminal devices (terminal device), and the like, which have a wireless communication function. For convenience of description, the above-mentioned devices are collectively referred to as a terminal in this application.
Optionally, in this embodiment of the present application, a network element may also be referred to as a network device, a network node, a functional entity, a communication device, or a communication device, and the function of each network element may be implemented by one device, may also be implemented by multiple devices together, and may also be a functional module in one device, which is not limited in this embodiment of the present application. It is understood that the above functions may be either network elements in a hardware device, software functions running on dedicated hardware, or virtualized functions instantiated on a platform (e.g., a cloud platform).
The technical scheme provided by the application can be applied to various application scenarios, such as enhanced mobile broadband (eMBB), ultra-reliable and ultra-low latency communication (uRLLC), and mass internet of things communication (mMTC).
It should be noted that the network architecture and the service scenario described in the embodiment of the present application are for more clearly illustrating the technical solution of the embodiment of the present application, and do not form a limitation on the technical solution provided in the embodiment of the present application, and it is known by a person skilled in the art that the technical solution provided in the embodiment of the present application is also applicable to similar technical problems along with the evolution of the network architecture and the appearance of a new service scenario.
For the sake of understanding, the following description will be made of terms and concepts related to the embodiments of the present application.
1. PDU session
The 5GC supports a PDU connection service, the PDU connection service is a service for exchanging PDU data packets between the UE and the DN, and the PDU connection service is realized by the UE initiating the establishment of a PDU session. After a PDU session is established, a data transmission channel between the UE and the DN is established.
The network side may also trigger the establishment of a PDU session, for example: when the application server wants to establish PDU session connection, the application server sends a trigger message to the 5GC, when the 5GC receives an establishment request of the application server, the 5GC sends a message for triggering PDU session establishment to the UE, the UE sends the message to a corresponding application on the UE after receiving the message, and the application on the UE determines when to initiate the designated PDU session connection according to the content of the trigger message.
2. 5G System Connection Management (CM)
When the UE wants to communicate with the 5GC, the 5GC deletes resources and temporarily transmits data because the UE is initially turned on or in an idle state for a while, and thus the UE needs to establish a connection with the AMF, which is called a CM. The CM may be used to establish and release a management plane signaling connection between the UE and the AMF.
The signaling connection between the UE and the AMF has two states, including an IDLE state (CM-IDLE) and a CONNECTED state (CM-CONNECTED). When downlink data is to be transmitted to a CM-IDLE state UE, the network side needs to use a paging message to start the state transition procedure. The paging message triggers the UE to establish a Radio Resource Control (RRC) connection and send a service request Network Attached Storage (NAS) message to the AMF. The service request triggers an N2 signaling connection that transitions the UE to a CM-CONNECTED state. The UE switches from the CM-CONNECTED state to the CM-IDLE state when the signaling connection is released or when the signaling connection fails.
3. Network side triggered service request flow
A scenario in which a network side (e.g., SMF, PCF, NEF, UDM, etc.) triggers a service request procedure is that downlink data (e.g., downlink user data, downlink NAS signaling message, etc.) needs to be sent to a UE when a connection management state of the UE is in a CM-IDLE state. At this time, the AMF triggers a paging procedure for the UE, and the UE needs to initiate a service request procedure to complete the re-establishment of the PDU session connection in response to the AMF paging.
4. Asynchronous Type Communication (ATC)
The 3GPP defines ATC technology for core network management in the 5GC communication architecture. The ATC enables the 5GC to delay synchronizing the UE message with the UE, thereby realizing high-efficiency signaling overhead and increasing system capacity.
Wherein, the 5GC supports ATC having the following functions: the UE messages can be stored according to the received messages and later synchronized with the involved network devices or UEs. For the signaling process (for example, service request process, PDU session modification process, etc.) triggered by the network side (for example, PCF, UDM, etc.), if the state of UE in AMF is CM-IDLE state, AMF updates and stores UE message based on the received message without paging UE. When the state of the UE in the AMF enters the CM-CONNECTED state, the AMF forwards the N1 message and the N2 message so as to synchronize the UE message with the RAN equipment and/or the UE.
Currently, the 3GPP defines an ATC technology in a 5G system architecture, where the ATC technology supports that, when a connection management state of a UE is in a CM-IDLE state, if a service request flow triggered by a network side occurs, a 5GC does not immediately initiate a process of paging the UE, but initiates processes of context synchronization, PDU session reestablishment, and the like to the UE after a delay. In the 5G system architecture, if the ATC function is applied, for a service request procedure triggered by the network side, if the connection management state of the UE in the AMF is in the CM-IDLE state, the AMF does not immediately initiate a paging procedure to the UE, only after the connection management state of the UE is in the CM-CONNECTED state, for example: the UE initiates the uplink service actively, and the AMF will send an update message to the UE to synchronize the context information of the UE (e.g., updated subscription information, updated mobility management policy, etc.).
In the current system definition, the configuration, activation, deactivation, etc. of the ATC are done locally at the AMF. If the connection management state of the UE is in the CM-IDLE state, the AMF cannot distinguish the specific behavior of the service request triggered by the network side under the condition of applying the ATC function, and can uniformly intercept all signaling information issued to the UE. In some cases, for example: when the signaling information sent to the UE is some updating information (such as subscription information, mobility management policy information and the like), the information is carried out by taking the UE as granularity, and the application of the ATC function does not influence the user experience. However, for some important services (e.g., services dedicated to working chat software) with PDU session granularity, the 5GC cannot page the UE in time due to the use of ATC function, resulting in impaired user service experience.
In order to solve the foregoing technical problem, an embodiment of the present application provides a communication method, where a first network element receives, from a second network element, a first message for indicating that a first PDU session of a terminal receives downlink data when a connection management state of the terminal is in an idle state. The first message includes the following information: data network information and/or network slice information corresponding to the first PDU session. The first network element determines a first management strategy corresponding to the first PDU session according to data network information and/or network slice information corresponding to the first PDU session, wherein the first management strategy is used for indicating whether the first PDU session enables an ATC function, and then the first network element initiates paging to the terminal according to the first management strategy. The terminal can be paged according to the ATC strategy corresponding to each PDU session, the control of the ATC function with the PDU session as the granularity is realized, the flexibility of the application of the ATC function can be improved, and the service experience of a user is ensured.
Illustratively, as shown in fig. 3, a communication method provided in an embodiment of the present application includes the following steps:
s301, under the condition that the connection management state of the terminal is in an idle state, the second network element sends a first message to the first network element. Accordingly, the first network element receives the first message from the second network element.
The IDLE state refers to a state in which the terminal and the network side do not have any data to transmit, and may be identified by a CM-IDLE or other forms. For example, after the terminal requests the PDU session to be established successfully, the terminal may enter an idle state for some reasons (e.g., no data transmission between the terminal and the network side, device network management and control, etc.).
The first message is used for indicating that the first PDU session of the terminal receives the downlink data. Illustratively, the downlink data includes, but is not limited to, downlink user data, downlink NAS signaling messages, and the like. The downlink data may be downlink user plane data or other data.
Optionally, the following information may be included in the first message: data network information and/or network slice information corresponding to the first PDU session.
Optionally, the first message may further include an identity of the terminal, an identity of the first PDU session, and the like. For example, the first network element may determine which PDU session of the terminal receiving the downlink data is specific according to the identity of the receiving terminal and the identity of the first PDU session.
For example, the identity of the terminal may be a subscription permanent identity (SUPI) of the terminal. The data network identifier may be a Data Network Name (DNN) for providing a PDU connection service, or may be other information that may be used to identify the data network. The network slice identifier may be single network slice association assistance information (S-ASSAI), or may be other information that may be used to identify a network slice.
Optionally, the first network element and the second network element may communicate directly, or may be forwarded by another device.
Illustratively, the first network element may be an SMF; the second network element may be a PCF or a UPF.
S302, the first network element determines a first management strategy corresponding to the first PDU session according to the data network information and/or the network slice information corresponding to the first PDU session.
Wherein the first management policy is used to indicate whether the first PDU session enables an ATC function.
Illustratively, whether an ATC function is enabled for a PDU session may be indicated implicitly. For example: if the first network element determines that the first management strategy does not exist according to the data network information and/or the network slice information corresponding to the first PDU session, it may be determined that the ATC function is not enabled for the first PDU session; if the first network element determines that the first management policy exists according to the data network information and/or the network slice information corresponding to the first PDU session, it may be determined that the ATC function is enabled for the first PDU session.
It is also possible to indicate whether a PDU session enables the ATC function by way of display. For example: indicating through bit information, if the indication is "1", determining that the first PDU session enables an ATC function; if the indication is "0," it may be determined that the first PDU session does not enable the ATC function. The present application does not specifically limit the manner of this indication.
One service corresponds to one PDU session, which may be uniquely identified by a data network identification and/or a network slice identification. For example, the first network element may determine the corresponding first management policy according to the data network identifier and/or the network slice identifier, and may determine the first management policy of the PDU session corresponding to the data network identifier and/or the network slice identifier.
S303, the first network element initiates paging to the terminal according to the first management strategy.
In a possible implementation manner, if the first management policy indicates that the ATC function is not enabled in the first PDU session, step S303 may be specifically implemented as: and the first network element sends a fifth message to the third network element, wherein the fifth message is used for indicating the third network element to immediately initiate paging to the terminal so as to complete the reestablishment of the first PDU session connection.
Optionally, the fifth message may include a first management policy, so that the third network element initiates paging to the terminal according to the first management policy. In this implementation, after receiving the fifth message, the third network element immediately initiates a process of paging the terminal, and as a response to the paging, the terminal initiates a service request procedure to complete reestablishment of the PDU session connection.
Alternatively, the first PDU session connection may refer to a user plane connection of the first PDU session, as generally described herein.
Illustratively, the third network element may be an AMF.
In another possible implementation manner, if the first management policy indicates that the first PDU session enables the ATC function, step S303 may specifically be implemented as: and the first network element sends a sixth message to the third network element, wherein the sixth message is used for indicating the third network element to reestablish the connection of the first PDU session to the terminal after the connection management state of the terminal is in a connected state.
Optionally, the sixth message may also include the first management policy, so that the third network element initiates paging to the terminal according to the first management policy. In this implementation, after receiving the sixth message, the third network element does not initiate a process of paging the terminal for a while, and after the connection management state of the terminal is converted into the connection state, the third network element indicates the terminal to complete reestablishment of the first PDU session connection. Optionally, the connection status may be identified by CM-CONNECTED, or may be identified in other forms. For example, the reason why the connection management state of the terminal is converted into the connection state includes that the terminal initiates uplink data transmission, and other PDU sessions in which the ATC function is not enabled of the terminal receive downlink data, and the like.
Based on the technical scheme, the control of the ATC function with the PDU session as the granularity is realized, the flexibility of the ATC function application can be improved, and the service experience of the user is ensured.
Optionally, as shown in fig. 4, before step S301, the method shown in fig. 3 further includes the following steps:
s304, the terminal sends a second message to the first network element. Accordingly, the first network element receives the second message from the terminal.
Wherein the second message is for requesting establishment of the first PDU session.
The second message includes the following information: the terminal comprises an identity identification of the terminal, a data network identification corresponding to the first PDU session and/or a network slice identification corresponding to the first PDU session. For the specific introduction of the identity identifier of the terminal, the data network identifier of the first PDU session, and/or the network slice identifier, reference is made to the above description, which is not repeated herein.
For a terminal, it may establish one or more PDU sessions.
S305, the first network element sends a third message to the second network element according to the second message. Accordingly, the second network element receives the third message from the first network element.
Wherein the third message is for requesting a first management policy for the first PDU session. Optionally, the first network element may also request other management policies of the terminal from the second network element, for example: the terminal manages the ATC of other PDU sessions, and manages other types of management policies (such as QoS, flow control, gating, etc.).
The third message includes the following information: the terminal identity, the data network information and/or the network slice information corresponding to the first PDU session. For the specific introduction of the identity identifier of the terminal, the data network identifier of the first PDU session, and/or the network slice identifier, please refer to the above description, which is not repeated herein.
S306, the second network element sends a fourth message to the first network element according to the third message. Accordingly, the first network element receives the fourth message from the second network element.
Wherein the fourth message includes the first management policy. For example, the second network element may determine the first management policy according to the identity of the terminal, the data network information corresponding to the first PDU session, and/or the network slice information. The fourth message is used for indicating the first network element to initiate paging to the terminal according to the first management strategy.
Optionally, the fourth message further includes a second management policy of the second PDU session of the terminal, where the second management policy is used to indicate whether the second PDU session of the terminal enables the ATC function. The second PDU session may refer to one or more PDU sessions of the terminal other than the first PDU session, that is, the second network element may issue the management policy of the plurality of PDU sessions of the terminal to the first network element at the same time. For example, the second network element may determine the management policy signed by the terminal according to the identity of the terminal, and issue part or all of the management policies signed by the terminal to the first network element at the same time. Optionally, the second network element may also issue the management policies through multiple messages.
Optionally, before S301, the method shown in fig. 3 further includes the following steps (not shown in the figure):
s307, the second network element generates a first management strategy.
Optionally, the second network element may generate at least one management policy of the terminal according to the subscription information of the terminal, where the at least one management policy includes the first management policy.
Next, taking the first network element as an SMF, the second network element as a PCF, and the third network element as an AMF as an example, fig. 5 shows another communication method provided in the embodiment of the present application, where the method includes the following steps:
s501, the terminal sends a second message to the SMF.
For the introduction of the second message, reference is made to the above description, which is not repeated herein.
For example, in this embodiment of the application, the second message may be specifically implemented as a PDU session establishment request message in step S501 shown in fig. 5.
S502, SMF sends a third message to PCF.
For the introduction of the third message, please refer to the above description, which is not repeated herein.
For example, in this embodiment of the application, the third message may be specifically implemented as the session management policy association request message in step S502 shown in fig. 5.
S503, the PCF sends a fourth message to the SMF.
The introduction of the fourth message refers to the above description, and is not repeated here.
For example, in this embodiment of the application, the fourth message may be specifically implemented as the session management policy association response message in step S503 shown in fig. 5.
S504, the SMF sends a PDU session establishment receiving message to the terminal.
At this time, the PDU session is successfully established, and the terminal enters a CM-CONNECTED state.
And S505, the terminal enters a CM-IDLE state.
Exemplary reasons for the terminal to enter the CM-IDLE state include: the terminal and the network side do not have any data to transmit in a preset time period, and the network equipment performs management and control and the like.
S506, the UPF sends a first message to the SMF.
For the introduction of the first message, reference is made to the above description, which is not repeated herein.
For example, in the embodiment of the present application, this step may be specifically implemented as step S506 shown in fig. 5: a network side triggered service request flow occurs.
The network side trigger includes but is not limited to PCF, NEF, UPF, etc. Illustratively, the SMF receives downlink data sent by the UPF to the corresponding PDU session, which indicates that the PDU session receives downlink user plane data, and a service request procedure triggered by the network side occurs. In view of the fact that the service request process triggered by the network side is the prior art and a specific network element interaction process, details are not repeated in the present application.
S507, SMF judges whether there is ATC management strategy corresponding to PDU conversation.
The SMF determines whether the ATC management strategy of the PDU session exists at present based on the ATC management strategy issued before the PCF. If the PDU session exists, the ATC management strategy of the PDU session is sent to the AMF, and if the PDU session does not exist, the ATC management strategy of the PDU session does not need to be sent to the AMF.
S508, the SMF sends an AMF communication and information transfer request message to the AMF.
Optionally, the AMF communication and information transfer request includes the SUPI of the terminal and the ATC management policy. Alternatively, the ATC management policy may be issued by other messages.
For example, whether the ATC function is enabled for the corresponding PDU session may be indicated by the bit information, if the indication is "1", it indicates that the ATC function is enabled for the corresponding PDU session, and at this time, step S510 is executed; if the indicated value is "0", it indicates that the corresponding PDU session does not enable the ATC function, or if there is no ATC management policy for the PDU session, it may also indicate that the corresponding PDU session does not enable the ATC function, and then steps S511 to S513 are performed. Please refer to the above description for the indication manner.
S509, the AMF sends an AMF communication and information transfer response message to the SMF.
S510, the AMF immediately initiates paging to the terminal.
After the AMF immediately initiates paging to the terminal, the AMF triggers a service request procedure of the terminal to complete re-establishment of the PDU session connection, and optionally, may specifically complete connection re-establishment of the PDU session user plane.
S511, the AMF temporarily does not initiate paging to the terminal.
And S512, the terminal enters a CM-CONNECTED state.
Illustratively, for some reasons, for example: the terminal initiates uplink data transmission, receives downlink data in other PDU sessions in which the ATC function is not enabled, and the like, and the terminal may enter a CM-CONNECTED state.
S513, the AMF indicates to the terminal that the re-establishment of the PDU session connection is completed.
Based on the technical scheme, the terminal can be paged according to the ATC strategy corresponding to each PDU session, the control of the ATC function with the PDU session as the granularity is realized, the flexibility of the application of the ATC function can be improved, and the service experience of a user is ensured.
The scheme provided by the embodiment of the invention is mainly introduced from the perspective of a method. To implement the above functions, it includes hardware structures and/or software modules for performing the respective functions. Those of skill in the art will readily appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the embodiment of the present invention, the communication apparatus may be divided into functional modules according to the above method examples, for example, each functional module may be divided according to each function, or two or more functions may be integrated into one processing module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. Optionally, the division of the modules in the embodiment of the present invention is schematic, and is only a logic function division, and there may be another division manner in actual implementation.
Fig. 6 is a schematic structural diagram of a communication device 600 according to an embodiment of the present disclosure. The communication device 600 includes a communication unit 601 and a processing unit 602.
In one possible example, the communication device may be configured to perform the communication method performed by the first network element.
A communication unit 601, configured to receive a first message when a connection management state of a terminal is in an idle state, where the first message is used to indicate that a first protocol data unit PDU session of the terminal receives downlink data, and the first message includes the following information: data network information and/or network slice information corresponding to the first PDU session.
A processing unit 602, configured to determine, according to data network information and/or network slice information corresponding to the first PDU session, a first management policy corresponding to the first PDU session, where the first management policy is used to indicate whether the first PDU session enables an asynchronous type communication ATC function.
The processing unit 602 further initiates paging to the terminal according to the first management policy.
In one possible design, the communication unit 601 is further configured to receive a second message from the terminal, where the second message is used to request establishment of the first PDU session, and the second message includes the following information: the terminal identity, the data network information and/or the network slice information corresponding to the first PDU session. The processing unit 602 is further configured to send a third message to the second network element according to the second message, where the third message is used to request the first management policy of the first PDU session, and the third message includes the following information: the terminal identity, the data network information and/or the network slice information corresponding to the first PDU session. The communication unit 601 is further configured to receive a fourth message from the second network element, where the fourth message includes a first management policy, and the first management policy is determined according to the identity of the terminal, and the data network information and/or the network slice information corresponding to the first PDU session.
In one possible design, the first management policy indicates that the first PDU session does not enable ATC functionality; the communication unit 601 is specifically configured to send a fifth message to the third network element, where the fifth message is used to instruct the third network element to immediately initiate paging to the terminal, so as to complete reestablishment of the first PDU session connection.
In one possible design, the first management policy indicates that the first PDU session enables the ATC function; the communication unit 601 is specifically configured to send a sixth message to the third network element, where the sixth message is used to indicate the third network element to reestablish the connection of the first PDU session to the terminal after the connection management state of the terminal is in the connected state.
In one possible design, the fourth message further includes a second management policy of the second PDU session of the terminal, the second management policy being used to indicate whether the ATC function is enabled for the second PDU session.
In another possible example, the communication device may be configured to perform the communication method performed by the second network element.
A communication unit 601, configured to receive a third message from the first network element, where the third message is used to request the first management policy of the first PDU session of the terminal, and the third message includes the following information: the terminal identity, the data network information and/or the network slice information corresponding to the first PDU session.
A processing unit 602, configured to send a fourth message to the first network element according to the third message, where the fourth message includes a first management policy, where the first management policy is used to indicate whether the ATC function is enabled for the first PDU session, and the first management policy is determined according to the identity of the terminal, and data network information and/or network slice information corresponding to the first PDU session; the fourth message is used for indicating the first network element to initiate paging to the terminal according to the first management strategy.
In one possible design, the fourth message further includes a second management policy of the second PDU session of the terminal, the second management policy being used to indicate whether the ATC function is enabled for the second PDU session.
In the case of implementing the functions of the integrated modules in the form of hardware, the embodiment of the present invention provides another possible structural schematic diagram of the communication apparatus in the above embodiment. As shown in fig. 7, the communication apparatus 700 may include: a processor 701, a communication interface 702, a memory 703, and a bus 704.
The processor 701 may be implemented or performed with various illustrative logical blocks, modules, and circuits described in connection with the disclosure herein. The processor 701 may be a central processing unit, a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, transistor logic, a hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. The processor 701 may also be a combination of computing functions, e.g., comprising one or more microprocessors, DSPs, and microprocessors, among others.
A communication interface 702 for connecting with other devices through a communication network. The communication network may be an ethernet network, a radio access network, a Wireless Local Area Network (WLAN), etc.
Memory 703 is used to store one or more programs, including computer-executable instructions. The memory 703 may be, but is not limited to, a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a Random Access Memory (RAM) or other type of dynamic storage device that can store information and instructions, an electrically erasable programmable read-only memory (EEPROM), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer.
The bus 704 may be an Extended Industry Standard Architecture (EISA) bus or the like. The bus 704 may be divided into an address bus, a data bus, a control bus, and the like. For ease of illustration, only one thick line is shown in FIG. 7, but this is not intended to represent only one bus or type of bus.
Through the description of the above embodiments, it is clear to those skilled in the art that, for convenience and simplicity of description, the foregoing division of each functional module is merely used as an example, and in practical applications, the foregoing function distribution may be completed by different functional modules according to needs, that is, the internal structure of the service routing apparatus may be divided into different functional modules to complete all or part of the above described functions.
The embodiment of the application also provides a computer readable storage medium. All or part of the processes in the above method embodiments may be performed by computer instructions to instruct related hardware, and the program may be stored in the above computer-readable storage medium, and when executed, may include the processes in the above method embodiments. The computer readable storage medium may be of any of the embodiments described above or a memory. The computer readable storage medium may also be an external storage device of the communication apparatus, such as a plug-in hard disk, a Smart Memory Card (SMC), a Secure Digital (SD) card, a flash memory card (flash card), or the like, provided on the communication apparatus. Further, the computer-readable storage medium may include both an internal storage unit and an external storage device of the communication apparatus. The computer-readable storage medium stores the computer program and other programs and data required by the communication apparatus. The above-described computer-readable storage medium may also be used to temporarily store data that has been output or is to be output.
The present application further provides a computer program product, which contains a computer program and when the computer program product runs on a computer, causes the computer to execute any one of the methods provided in the above embodiments.
The above description is only an embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions within the technical scope of the present disclosure should be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (11)

1. A communication method, applied to a first network element, the method comprising:
under the condition that the connection management state of the terminal is in an idle state, receiving a first message from a second network element, wherein the first message is used for indicating that a first Protocol Data Unit (PDU) session of the terminal receives downlink data, and the first message comprises the following information: data network information and/or network slice information corresponding to the first PDU session;
determining a first management policy corresponding to the first PDU session according to data network information and/or network slice information corresponding to the first PDU session, wherein the first management policy is used for indicating whether the first PDU session enables an Asynchronous Type Communication (ATC) function;
and initiating paging to the terminal according to the first management strategy.
2. The method of claim 1, wherein prior to receiving the first message from the second network element, the method further comprises:
receiving a second message from the terminal, the second message being used for requesting establishment of the first PDU session, the second message including the following information: the identity of the terminal, and data network information and/or network slice information corresponding to the first PDU session;
sending a third message to the second network element according to the second message, where the third message is used to request a first management policy of the first PDU session, and the third message includes the following information: the identity of the terminal, and data network information and/or network slice information corresponding to the first PDU session;
and receiving a fourth message from the second network element, where the fourth message includes the first management policy, and the first management policy is determined according to the identity of the terminal, and the data network information and/or the network slice information corresponding to the first PDU session.
3. The method according to claim 1 or 2, wherein the first management policy indicates that the first PDU session does not enable an ATC function;
initiating paging to the terminal according to the first management policy, including:
and sending a fifth message to a third network element, where the fifth message is used to instruct the third network element to immediately initiate paging to the terminal, so as to complete reestablishment of the first PDU session connection.
4. The method according to claim 1 or 2, wherein the first management policy indicates that the first PDU session enables an ATC function;
initiating paging to the terminal according to the first management policy, including:
and sending a sixth message to a third network element, where the sixth message is used to indicate the third network element to reestablish the connection of the first PDU session to the terminal after the connection management state of the terminal is in a connected state.
5. The method of claim 2, wherein the fourth message further comprises a second management policy for a second PDU session of the terminal, the second management policy indicating whether the second PDU session enables an ATC function.
6. A communication method, applied to a second network element, the method comprising:
receiving a third message from the first network element, the third message being used for requesting a first management policy of a first PDU session of the terminal, the third message including the following information: the identity of the terminal, and data network information and/or network slice information corresponding to the first PDU session;
sending a fourth message to the first network element according to the third message, where the fourth message includes the first management policy, the first management policy is used to indicate whether the first PDU session enables an ATC function, and the first management policy is determined according to the identity of the terminal, and data network information and/or network slice information corresponding to the first PDU session; the fourth message is used for instructing the first network element to initiate paging to the terminal according to the first management policy.
7. The method of claim 6, wherein the fourth message further comprises a second management policy for a second PDU session of the terminal, the second management policy indicating whether the second PDU session enables an ATC function.
8. A communication apparatus, applied to a first network element, the communication apparatus includes a communication unit and a processing unit;
a communication unit, configured to receive a first message when a connection management state of a terminal is in an idle state, where the first message is used to indicate that a first protocol data unit PDU session of the terminal receives downlink data, and the first message includes the following information: data network information and/or network slice information corresponding to the first PDU session;
a processing unit, configured to determine a first management policy corresponding to the first PDU session according to data network information and/or network slice information corresponding to the first PDU session, where the first management policy is used to indicate whether the first PDU session enables an asynchronous type communication ATC function;
and the processing unit is used for initiating paging to the terminal according to the first management strategy.
9. A communication apparatus, applied to a second network element, the communication apparatus comprising a communication unit and a processing unit;
the communication unit is configured to receive a third message from the first network element, where the third message is used to request a first management policy of a first PDU session of the terminal, and the third message includes the following information: the identity of the terminal, and data network information and/or network slice information corresponding to the first PDU session;
the processing unit is configured to send a fourth message to the first network element according to the third message, where the fourth message includes the first management policy, the first management policy is used to indicate whether the first PDU session enables an ATC function, and the first management policy is determined according to the identity of the terminal, and data network information and/or network slice information corresponding to the first PDU session; the fourth message is used for instructing the first network element to initiate paging to the terminal according to the first management policy.
10. A communication device, comprising: a processor, a communication interface, and a memory; the communication interface is for communicating with other devices, the memory is for storing one or more programs, the one or more programs including computer-executable instructions, which when executed by the processor, are stored by the memory, to cause the communication device to perform the method of any of claims 1-5 or to cause the communication device to perform the method of any of claims 6-7.
11. A computer-readable storage medium comprising computer-executable instructions that, when executed on a computer, cause the computer to perform the method of any one of claims 1-5 or cause the computer to perform the method of any one of claims 6-7.
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