CN115442791A

CN115442791A - Communication method and device

Info

Publication number: CN115442791A
Application number: CN202110620088.7A
Authority: CN
Inventors: 杨林平; 胡先鸽; 胡文; 强鹂
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2021-06-03
Filing date: 2021-06-03
Publication date: 2022-12-06
Also published as: WO2022253197A1

Abstract

A communication method and device, the method includes: and the session management function network element receives a first message from the access and mobility management function network element, wherein the first message is used for requesting the session management function network element to activate the user plane resource of the first session. And under the condition that the process of activating the user plane resources of the first session is initiated, the session management function network element sends a second message to the access and mobility management function network element, wherein the second message is used for indicating the successful activation of the user plane resources of the first session. By adopting the method, when the flow of activating the user plane resources initiated by the terminal equipment conflicts with the flow of activating the user plane resources initiated by the network side equipment, the activated user plane resources can be prevented from being deactivated or the first session can be prevented from being released, and the user service experience is improved.

Description

Communication method and device

Technical Field

The embodiment of the application relates to the field of wireless communication, in particular to a communication method and device.

Background

In a communication system, both a User Equipment (UE) and a network side device may operate for the same session. For example, in a fifth generation (5 th generation,5 g) communication system, if a User Equipment (UE) has uplink data to send, the UE may trigger a request to activate the user plane resources. If the network side equipment has downlink data to be sent, the activation of the user plane resource can also be triggered. Therefore, there is a scenario that a conflict may occur between a procedure for activating a user plane resource initiated by the UE and a procedure for activating a user plane resource initiated by the network side device for a same Protocol Data Unit (PDU) session. Further, the above conflict scenario may cause the activated user plane resource to be deactivated, and even cause the PDU session to be released, thereby affecting the service process and user experience of the user.

Disclosure of Invention

The embodiment of the application provides a communication method and a communication device, which are used for solving the problem that activated user plane resources are deactivated or PDU conversation is released due to the fact that a conflict occurs between a process of activating the user plane resources initiated by terminal equipment and a process of activating the user plane resources initiated by network side equipment.

In a first aspect, the present application provides a communication method, including: a session management function network element receives a first message from an access and mobility management function network element, wherein the first message is used for requesting the session management function network element to activate a user plane resource of a first session; and under the condition that the process of activating the user plane resources of the first session is initiated, the session management function network element sends a second message to the access and mobility management function network element, wherein the second message is used for indicating that the user plane resources of the first session are successfully activated.

By adopting the method, under the condition that the process of activating the user plane resources of the first session is initiated, if the session management function network element receives the first message from the access and mobility management function network element, namely when the terminal equipment and the session management function network element conflict with each other in initiating the user plane resources of the same PDU session, the session management function network element sends a second message to the access and mobility management function network element, and the second message indicates that the user plane resources of the first session are successfully activated, so that the activated user plane resources can be prevented from being deactivated or the first session is released, and the user service experience is improved.

In one possible design, the session management function network element may determine that a procedure to activate the user plane resource of the first session has been initiated.

Illustratively, the session management function network element may determine that the flow of activating the user plane resource of the first session has been initiated by the state of the user plane resource of the first session.

In one possible design, the determining, by the session management function network element, that activation of the user plane resource of the first session has been initiated includes: the session management function network element may determine that the state of the user plane resource of the first session is active.

By adopting the above design, in response to the first message, the session management function network element may actively determine the state of the user plane resource of the first session, and determine that the process of activating the user plane resource of the first session has been initiated according to that the state of the user plane resource of the first session is being activated. The state of the user plane resource of the first session is active, which may be understood as that the user plane resource of the first session is being established, or the user plane resource of the first session is not established yet.

In a possible design, the session management function network element may determine, according to first user plane context state information corresponding to the first session, that the state of the user plane resource of the first session is being activated; wherein the first user plane context state information indicates that the state of the user plane resource of the first session is active.

In one possible design, before the session management function network element receives the first message from the access and mobility management function network element, the session management function network element sends a third message to the access and mobility management function network element, where the third message includes first status indication information and first session management information, the first status indication information is used to indicate that the status of the user plane resource of the first session is active, and the first session management information includes a relevant parameter for activating the user plane resource of the first session.

Exemplarily, the related parameters for activating the user plane resource of the first session may include one or more of the following: identification of PDU session, qoS flow identification, qoS configuration, etc. The access network device may establish a DRB bearer of the first session according to the first session management information.

In one possible design, the second message includes second status indication information, excluding a parameter related to activation of the user plane resource of the first session, the second status indication information indicating that the status of the user plane resource of the first session is being activated.

With the above design, since the session management function network element has sent the parameter for activating the user plane resource of the first session, for example, the third message includes the first session management information, and the first session management information includes the relevant parameter for activating the user plane resource of the first session, the session management function network element may not need to send the relevant parameter for activating the user plane resource of the first session again. Furthermore, the design can save signaling overhead. Furthermore, the second message does not include the relevant parameters for activating the user plane resources of the first session, and may also implicitly indicate that a conflict occurs with respect to the user plane resource activation of the first session.

In one possible design, the determining, by the session management function network element, that activation of the user plane resource of the first session has been initiated includes: the session management function network element may determine that a state of a user plane resource of the first session is activated.

With the above design, in response to the first message, the session management function network element may actively determine the state of the user plane resource of the first session, and determine that a process of activating the user plane resource of the first session has been initiated according to that the state of the user plane resource of the first session is activated. The state of the user plane resource of the first session is activated, which may be understood as that the user plane resource of the first session is established, or that the user plane resource of the first session is successfully established.

In one possible design, before the session management function network element receives the first message from the access and mobility management function network element, the session management function network element receives second session management information from an access network device, where the second session management information indicates that the user plane resource activation of the first session is successful. And the session management functional network element determines that the state of the user plane resource of the first session is activated according to the second session management information.

In addition, in some embodiments, when the second session management information indicates that the activation of the user plane resource of the first session is successful, the session management function network element may further update the first user plane context state information corresponding to the first session, that is, update the state of the user plane resource of the first session from being activated to being activated.

In one possible design, the second message includes third status indication information indicating that the status of the user plane resource of the first session is activated.

In a second aspect, the present application provides a method of communication, the method comprising: the terminal equipment receives a paging message from an access and mobility management function network element, and responds to the paging message, the terminal equipment sends a first service request message to the access and mobility management function network element. After the terminal device sends the first service request message to the access and mobility management function network element, the terminal device may start a procedure of requesting activation of a user plane resource of a first session. The terminal device further receives a first service acceptance message from the access and mobility management function network element, wherein the first service acceptance message includes an identifier of at least one session, and the at least one session is a session with activated user plane resources. And when the identification of the at least one session comprises the identification of the first session, the terminal equipment cancels the process of requesting to activate the user plane resource of the first session.

By adopting the method, when the first service receiving message comprises the identifier of the first session, the terminal equipment cancels the flow of requesting to activate the user plane resource of the first session, thereby avoiding the problem that the terminal equipment and the session management function network element conflict with each other when initiating the user plane resource activation of the same PDU session, improving the user service experience, and reducing the signaling interaction between the terminal equipment and the network side equipment.

In one possible design, the session in which the user plane resource is activated includes a session in which the user plane resource is being activated.

Illustratively, the session in which the user plane resource is activated may initiate a session in which the user plane resource is activated for the session management network element.

In one possible design, the process of the terminal device canceling the request for activating the user plane resource of the first session includes: and the terminal equipment does not send a second service request message to the access and mobility management function network element, wherein the second service request message is used for requesting to activate the user plane resource of the first session.

In one possible design, the terminal device may include a mobility management layer and a quality of service traffic control layer. The process of the terminal device starting a request to activate the user plane resource of the first session may specifically include: the mobility management layer receives a radio resource establishment request message from the qos traffic control layer, where the radio resource establishment request message is used to request activation of a user plane resource of the first session, the radio resource establishment request message includes an identifier of the first session, and the mobility management layer may cache the radio resource establishment request message.

In one possible design, the process of the terminal device canceling the request for activating the user plane resource of the first session further includes: the mobility management layer clears the radio resource establishment request message.

By adopting the design, the wireless resource establishment request message cached can be cleared in time.

In one possible design, the uplink data state information in the first service request message does not indicate an identification of the first session.

In a third aspect, the present application provides a communication method, including: the access and mobility management function network element receives a first message from the session management function network element, wherein the first message comprises status indication information, and the status indication information is used for indicating that the status of the user plane resource of the first session is active. And the access and mobility management function network element sends a first service acceptance message to the terminal equipment, wherein the first service acceptance message comprises an identifier of the first session, and the identifier of the first session is used for indicating that the user plane resource of the first session is activated.

By adopting the method, the access and mobility management function network element can inform the terminal equipment that the user plane resource of the first session is activated through the first service receiving message, so that the problem that the terminal equipment and the session management function network element conflict with each other when the user plane resource activation of the same PDU session is initiated can be avoided, the user service experience can be improved, and the signaling interaction between the terminal equipment and the network side equipment can be reduced.

In one possible design, the access and mobility management function network element generates the first service acceptance message including an identifier of the first session according to the status indication information.

With the above design, the access and mobility management function network element may add a new cell to the service reception message, and the content included in the new cell may be determined by the status indication information.

In one possible design, the access and mobility management function network element sends a paging message to the terminal device; and the access and mobility management function network element receives a first service request message from the terminal equipment, wherein the first service request message is used for responding to the paging message.

In one possible design, the first message further includes session management information including parameters related to activating user plane resources of the first session; and the access and mobility management function network element sends the session management information to access network equipment.

In a fourth aspect, the present application provides a communication method, including: an access and mobility management function network element receives a first message from a terminal device, wherein the first message is used for requesting to activate a user plane resource of the first session; and in the case that a procedure for activating the user plane resource of the first session has been initiated, the access and mobility management function network element sends a second message to the terminal device, where the second message indicates that the user plane resource of the first session fails to be activated, the second message includes a first cause value, and the first cause value indicates a cause of the user plane resource of the first session that fails to be activated, or the second message indicates that the user plane resource of the first session succeeds to be activated.

By adopting the method, under the condition that the process of activating the user plane resources of the first session is initiated, if the access and mobility management function network element receives the first message from the terminal equipment, namely when the terminal equipment and the session management function network element initiate the user plane resource activation of the same PDU session and conflict occurs, the access and mobility management function network element sends a second message to the terminal equipment, and the second message indicates the user plane resource activation success of the first session or the user plane resource activation failure of the first session, so that the activated user plane resources can be prevented from being deactivated or the PDU session is released, and the user service experience is improved.

In one possible design, the access and mobility management function network element determines that a procedure to activate user plane resources for the first session has been initiated.

Illustratively, the access and mobility management function network element may determine that a procedure of activating the user plane resources of the first session has been initiated by the state of the user plane resources of the first session.

In one possible design, the determining, by the access and mobility management function network element, that activation of the user plane resource of the first session has been initiated includes: the access and mobility management function network element may determine that a state of a user plane resource of the first session is active.

With the above design, in response to the first message, the access and mobility management function network element may actively determine the state of the user plane resource of the first session, and determine that a procedure for activating the user plane resource of the first session has been initiated according to that the state of the user plane resource of the first session is being activated. The state of the user plane resource of the first session is active, and it can be understood that the user plane resource of the first session is being established, or the user plane resource of the first session is not yet established.

In one possible design, before the access and mobility management function network element receives the first message from the terminal device, the access and mobility management function network element receives a third message from the session management function network element, where the third message includes first status indication information and session management information, the first status indication information is used to indicate that the status of the user plane resource of the first session is active, and the session management information includes a relevant parameter for activating the user plane resource of the first session. Therefore, the access and mobility management function network element determines the state of the user plane resource of the first session as being activated according to the first state indication information.

With the above design, the access and mobility management function network element may determine the state of the user plane resource of the first session.

In one possible design, the first cause value indicates that a state of a user plane resource of the first session is active.

In one possible design, the determining, by the access and mobility management function network element, that activation of the user plane resources for the first session has been initiated comprises: and the access and mobility management function network element determines that the state of the user plane resource of the first session is activated.

In one possible design, before the access and mobility management function network element receives the first message from the terminal device, the access and mobility management function network element receives a fourth message from the session management function network element, where the fourth message includes second status indication information, and the second status indication information is used to indicate that the status of the user plane resource of the first session is activated. Therefore, the access and mobility management function network element determines that the state of the user plane resource of the first session is activated according to the second state indication information.

In one possible design, the first cause value indicates that a state of a user plane resource of the first session is activated.

In one possible design, the first message is a service request message that includes uplink data state information indicating an identity of the first session.

In one possible design, when the second message indicates the failure of activation of the user plane resources of the first session, the second message is a service accept message, the service accept message includes an information element for indicating the result of activation of the PDU session, or the service accept message includes an information element for indicating the result of activation of the PDU session and an information element for indicating the error reason of the result of activation of the PDU session, the information element for indicating the result of activation of the PDU session indicates the failure of activation of the user plane resources of the first session, and the information element for indicating the error reason of the result of activation of the PDU session indicates the reason of failure of activation of the user plane resources of the first session.

In one possible design, when the second message indicates successful activation of the user plane resources for the first session, the second message is a service accept message that includes an information element indicating a PDU session activation result, where the information element indicating the PDU session activation result indicates successful activation of the user plane resources for the first session.

In a fifth aspect, the present application provides a communication method, including: a session management function network element receives a first message from an access and mobility management function network element, wherein the first message is used for requesting to activate a user plane resource of the first session; and in the case that a process of activating the user plane resources of the first session has been initiated, the session management function network element sends a second message to the access and mobility management function network element, where the second message is used to indicate that the user plane resources of the first session are failed to be activated, the second message includes a first cause value, and the first cause value indicates a cause of the user plane resources of the first session that are failed to be activated.

By adopting the method, under the condition that the process of activating the user plane resources of the first session is initiated, if the session management function network element receives the first message from the access and mobility management function network element, namely when the terminal equipment and the session management function network element conflict with each other in initiating the user plane resources of the same PDU session, the session management function network element sends a second message to the access and mobility management function network element, and the second message indicates that the user plane resources of the first session fail to be activated, so that the activated user plane resources can be prevented from being deactivated or the first session is released, and the user service experience is improved.

In one possible design, the session management function network element determines that a procedure to activate the user plane resources of the first session has been initiated.

In one possible design, the determining, by the session management function network element, that activation of the user plane resource of the first session has been initiated includes: and the session management function network element determines that the state of the user plane resource of the first session is active.

In a possible design, the session management function network element determines, according to first user plane context state information corresponding to the first session, that the state of the user plane resource of the first session is being activated; wherein the first user plane context state information indicates that a state of a user plane resource of the first session is active.

In one possible design, before the session management function network element receives the first message from the access and mobility management function network element, the session management function network element sends a third message to the access and mobility management function network element, where the third message is used for the session management function network element to activate the user plane resource of the first session; the third message comprises first state indication information and first session management information, wherein the first state indication information is used for indicating that the state of the user plane resource of the first session is being activated; the first session management information includes a parameter associated with activating a user plane resource of the first session.

In one possible design, the determining, by the session management function network element, that activation of the user plane resource of the first session has been initiated includes: and the session management function network element determines that the state of the user plane resource of the first session is activated.

In a possible design, before the session management function network element receives the first message, the session management function network element receives second session management information from an access network device, where the second session management information indicates that the user plane resource activation of the first session is successful; or, the session management function network element caches the first message until receiving second session management information from an access network device, where the second session management information is used to indicate that the user plane resource of the first session is successfully activated; and the session management functional network element determines that the state of the user plane resource of the first session is activated according to the second session management information.

In a sixth aspect, a method of communication, the method comprising: the access network equipment receives a first message from an access and mobility management function network element, wherein the first message is used for requesting the access network equipment to activate user plane resources of a first session; and under the condition that the user plane resources of the first session are activated, the access network equipment sends a second message to the access and mobility management function network element, wherein the second message indicates that the user plane resources of the first session are successfully activated.

By adopting the method, the access network equipment receives the first message from the access and mobility management function network element under the condition that the user plane resource of the first session is activated, namely when the terminal equipment and the session management function network element conflict with each other when the user plane resource activation initiated by the same PDU session is initiated, the access network equipment sends the second message to the access and mobility management function network element, and the second message indicates that the user plane resource of the first session is successfully activated, so that the activated user plane resource can be prevented from being deactivated or the first session is released, and the user service experience is improved.

In one possible design, the access network device determines that user plane resources for the first session are activated.

In one possible design, the access network device receives a second message from the access and mobility management function network element, where the second message is used to request the access network device to activate the user plane resources of the first session; the access network equipment sends a first RRC connection reconfiguration message to the terminal equipment according to the second message, wherein the first RRC connection reconfiguration message is used for establishing a DRB bearer of the first session; and the access network equipment receives a first RRC connection reconfiguration finishing message from the terminal equipment, wherein the first RRC connection reconfiguration finishing message is used for indicating that the DRB bearer of the first session is successfully established. And the access network equipment determines that the user plane resource of the first session is activated according to the first RRC connection reconfiguration completing message.

In one possible design, the access network device releases the DRB bearer of the first session and reconstructs the DRB bearer of the first session.

By adopting the design, the effectiveness of DRB bearing can be ensured by reconstructing the DRB bearing.

In a possible design, the releasing, by the access network device, the DRB bearer of the first session, and the reestablishing the DRB bearer of the first session may specifically include: the access network equipment sends a second RRC connection reconfiguration message to the terminal equipment, wherein the second RRC connection reconfiguration message is used for releasing the DRB bearer of the first session; the access network equipment receives a second RRC connection reconfiguration complete message from the terminal equipment, wherein the second RRC connection reconfiguration complete message is used for indicating that the DRB bearer of the first session is successfully released; the access network equipment sends a third RRC connection reconfiguration message to the terminal equipment, wherein the third RRC connection reconfiguration message is used for establishing a DRB bearer of the first session; and the access network equipment receives a third RRC connection reconfiguration completion message from the terminal equipment, wherein the third RRC connection reconfiguration completion message is used for indicating that the DRB bearer of the first session is successfully established.

In one possible design, the first message includes first session management information including relevant parameters for activating a user plane resource of the first session.

In one possible design, the third message includes second session management information including relevant parameters for activating user plane resources of the first session.

In one possible design, the second message includes third session management information indicating that user plane resource activation for the first session was successful.

In a seventh aspect, the present application provides a communications apparatus, comprising: the receiving and sending unit calls the processing unit to execute: receiving a first message from an access and mobility management function network element, the first message being used for requesting the device to activate a user plane resource of the first session; and sending a second message to the access and mobility management function network element under the condition that the process of activating the user plane resources of the first session is initiated, wherein the second message is used for indicating the successful activation of the user plane resources of the first session.

In one possible design, the processing unit is configured to determine that a flow of activating user plane resources for the first session has been initiated.

In one possible design, the processing unit is configured to determine that a state of a user plane resource of the first session is active.

In a possible design, the processing unit is configured to determine, according to first user plane context state information corresponding to the first session, that a state of a user plane resource of the first session is being activated; wherein the first user plane context state information indicates that the state of the user plane resource of the first session is active.

In a possible design, the transceiving unit is configured to send, before receiving the first message from the access and mobility management function network element, a third message to the access and mobility management function network element, where the third message is used by the session management function network element to activate user plane resources of the first session; the third message comprises first state indication information and first session management information, the first state indication information is used for indicating that the state of the user plane resource of the first session is being activated, and the first session management information comprises relevant parameters used for activating the user plane resource of the first session.

In one possible design, the processing unit is configured to determine that a status of a user plane resource of the first session is activated.

In a possible design, the transceiving unit is configured to receive second session management information from an access network device before receiving the first message from the access and mobility management function network element, where the second session management information indicates that user plane resource activation of the first session is successful; and the processing unit is used for determining that the state of the user plane resource of the first session is activated according to the second session management information.

In an eighth aspect, the present application provides a communication device, including a transceiver unit and a processing unit: the receiving and sending unit is used for receiving paging messages from the access and mobility management function network element; the receiving and sending unit is configured to send a first service request message to the access and mobility management function network element in response to the paging message; after sending the first service request message to the access and mobility management function network element, the processing unit is configured to start a procedure of requesting activation of a user plane resource of a first session; the transceiver unit is configured to receive a first service acceptance message from the access and mobility management function network element, where the first service acceptance message includes an identifier of at least one session, and the at least one session is a session in which a user plane resource is activated; and the processing unit is configured to cancel a flow requesting activation of the user plane resource of the first session when the at least one identifier includes the identifier of the first session.

In a possible design, the processing unit is configured to, when canceling the procedure of requesting activation of the user plane resource of the first session, not send a second service request message to the access and mobility management function network element, where the second service request message is used to request activation of the user plane resource of the first session.

In one possible design, the apparatus includes a mobility management layer and a quality of service traffic control layer; the mobility management layer receives a radio resource establishment request message from the QoS flow control layer, wherein the radio resource establishment request message is used for requesting to activate the user plane resource of the first session, and the radio resource establishment request message comprises the identifier of the first session; the mobility management layer buffers the radio resource establishment request message.

In one possible design, the mobility management layer clears the radio resource setup request message.

In a ninth aspect, the present application provides a communication device, comprising a transceiving unit and a processing unit: the processing unit calls the transceiving unit to execute: receiving a first message from a session management function network element, wherein the first message comprises status indication information, and the status indication information is used for indicating that the status of a user plane resource of a first session is active; and sending a first service acceptance message to the terminal equipment, wherein the first service acceptance message comprises the identification of the first session, and the identification of the first session is used for indicating that the user plane resource of the first session is activated.

In one possible design, the processing unit is configured to generate the first service acceptance message including an identification of the first session according to the status indication information.

In one possible design, the transceiver unit is configured to send a paging message to a terminal device; and receiving a first service request message from the terminal equipment, wherein the first service request message is used for responding to the paging message.

In one possible design, the first message further includes session management information including parameters related to activating user plane resources of the first session; the transceiver unit is configured to send the session management information to the access network device.

In a tenth aspect, the present application provides a communication device, comprising a transceiver unit and a processing unit: the processing unit calls the transceiving unit to execute: receiving a first message from a terminal device, wherein the first message is used for the terminal device to request to activate the user plane resource of the first session; and sending a second message to the terminal equipment under the condition that a process of activating the user plane resources of the first session has been started, wherein the second message indicates that the user plane resources of the first session are failed to be activated, the second message comprises a first reason value, and the first reason value indicates the reason of the failure of the user plane resources of the first session, or the second message indicates that the user plane resources of the first session are successfully activated.

In one possible design, the processing unit is configured to determine that a procedure to activate a user plane resource of the first session has been initiated.

In a possible design, the transceiver unit is configured to receive, before receiving the first message from the terminal device, a third message from a session management function network element, where the third message includes first status indication information and session management information, the first status indication information is used to indicate that a status of a user plane resource of the first session is active, and the session management information includes a relevant parameter for activating the user plane resource of the first session. And the processing unit is used for determining the state of the user plane resource of the first session as being activated according to the first state indication information.

In one possible design, the first cause value indicates that a user plane resource of the first session is being activated.

In a possible design, the transceiver unit is configured to receive, before receiving the first message from the terminal device, a fourth message from the session management function network element, where the fourth message includes second status indication information, and the second status indication information is used to indicate that the status of the user plane resource of the first session is activated; and the processing unit is used for determining the state of the user plane resource of the first session as activated according to the second state indication information.

In one possible design, the first cause value indicates that a user plane resource of the first session is activated.

In one possible design, when the second message indicates the failure of activation of the user plane resources of the first session, the second message is a service acceptance message, the service acceptance message includes an information element for indicating the result of activation of the PDU session, or the service acceptance message includes an information element for indicating the result of activation of the PDU session and an information element for indicating the cause of error of the result of activation of the PDU session, the information element for indicating the result of activation of the PDU session indicates the failure of activation of the user plane resources of the first session, and the information element for indicating the cause of error of the result of activation of the PDU session indicates the cause of failure of activation of the user plane resources of the first session.

In one possible design, when the second message indicates that the activation of the user plane resources for the first session is successful, the second message is a service accept message, the service accept message includes an information element indicating a PDU session activation result, and the information element indicating the PDU session activation result indicates that the activation of the user plane resources for the first session is successful.

In an eleventh aspect, the present application provides a communication device, including a transceiver unit and a processing unit: the processing unit calls the transceiving unit to execute: receiving a first message from an access and mobility management function network element, the first message being used for requesting the device to activate a user plane resource of the first session; and sending a second message to the access and mobility management function network element when a process of activating the user plane resources of the first session has been initiated, where the second message is used to indicate that the user plane resources of the first session are failed to be activated, and the second message includes a first cause value, where the first cause value indicates a reason for the failure to activate the user plane resources of the first session.

In one possible design, the session management function network element determines that a procedure for activating the user plane resource of the first session has been initiated.

In one possible design, the session management function network element determines a status of a user plane resource of the first session as being active.

In a possible design, the session management function network element determines, according to first user plane context state information corresponding to the first session, that the state of the user plane resource of the first session is being activated; wherein the first user plane context state information indicates that the state of the user plane resource of the first session is active.

In one possible design, before the session management function network element receives the first message from the access and mobility management function network element, the session management function network element sends a third message to the access and mobility management function network element, where the third message is used for the session management function network element to activate the user plane resource of the first session; the third message comprises first state indication information and first session management information, wherein the first state indication information is used for indicating that the state of the user plane resource of the first session is being activated; the first session management information comprises relevant parameters for activating user plane resources of the first session.

In one possible design, the session management function network element determines that the state of the user plane resource of the first session is activated.

In one possible design, before the session management function network element receives the first message from the access and mobility management function network element, the session management function network element receives second session management information from an access network device, where the second session management information indicates that the user plane resource activation of the first session is successful; and the session management function network element determines that the state of the user plane resource of the first session is activated according to the second session management information.

In a twelfth aspect, a communication device includes a transceiving unit and a processing unit: the processing unit calls the transceiving unit to execute: receiving a first message from an access and mobility management function network element, wherein the first message is used for requesting the access network equipment to activate a user plane resource of a first session; and sending a second message to the access and mobility management function network element under the condition that the user plane resource of the first session is activated, wherein the second message indicates that the user plane resource of the first session is successfully activated.

In one possible design, the processing unit is configured to determine that a user plane resource of the first session is activated.

In a possible design, the transceiving unit is configured to receive a second message from the access and mobility management function network element, where the second message is used to request the access network device to activate the user plane resource of the first session; sending a first RRC connection reconfiguration message to the terminal equipment according to the second message, wherein the first RRC connection reconfiguration message is used for establishing a DRB bearer of the first session; receiving a first RRC connection reconfiguration complete message from the terminal device, where the first RRC connection reconfiguration complete message is used to indicate that the DRB bearer of the first session is successfully established;

and the processing unit is configured to determine that the user plane resource of the first session is activated according to the first RRC connection reconfiguration complete message.

In one possible design, the processing unit invokes the transceiving unit to perform: and releasing the DRB bearer of the first session, and reestablishing the DRB bearer of the first session.

In a possible design, the transceiver unit is configured to send a second RRC connection reconfiguration message to the terminal device, where the second RRC connection reconfiguration message is used to release the DRB bearer of the first session; receiving a second RRC connection reconfiguration complete message from the terminal device, where the second RRC connection reconfiguration complete message is used to indicate that the DRB bearer of the first session is successfully released; sending a third RRC connection reconfiguration message to the terminal device, where the third RRC connection reconfiguration message is used to establish a DRB bearer of the first session; and receiving a third RRC connection reconfiguration complete message from the terminal device, where the third RRC connection reconfiguration complete message is used to indicate that the DRB bearer of the first session is successfully established.

In one possible design, the third message includes second session management information including parameters related to activating user plane resources for the first session.

In a thirteenth aspect, the present application further provides an apparatus. The device can execute the method design. The apparatus may be a chip or a circuit capable of executing a function corresponding to the method, or a device including the chip or the circuit.

In one possible implementation, the apparatus includes: a memory for storing computer executable program code; and a processor coupled with the memory. Wherein the program code stored by the memory includes instructions that, when executed by the processor, cause the apparatus or a device in which the apparatus is installed to perform the method of any of the above possible designs.

Wherein the apparatus may further comprise a communication interface, which may be a transceiver, or, if the apparatus is a chip or a circuit, an input/output interface of the chip, such as an input/output pin or the like.

In one possible embodiment, the device comprises corresponding functional units for carrying out the steps of the above method. The functions may be implemented by hardware, or by hardware executing corresponding software. The hardware or software includes one or more units corresponding to the above functions.

In a fourteenth aspect, the present application provides a computer-readable storage medium storing a computer program, which, when run on an apparatus, performs the method in any one of the above possible designs.

In a fifteenth aspect, the present application provides a computer program product, which includes a computer program for performing the method of any one of the above possible designs when the computer program runs on an apparatus.

Drawings

FIG. 1A is a block diagram of a mobile communication system according to an embodiment of the present application;

FIG. 1B is a second schematic diagram of a mobile communication system according to an embodiment of the present application;

fig. 2 is one of the flowcharts illustrating a conflict between a user plane resource activation procedure initiated by a network side device and a user plane resource activation procedure initiated by a UE for the same PDU session in the embodiment of the present application;

fig. 3 is a second flowchart illustrating a conflict between a user plane resource activation procedure initiated by a network side device and a user plane resource activation procedure initiated by a UE for the same PDU session in an embodiment of the present application;

fig. 4 is a flowchart of an NF service consumer requesting SMF to activate the user plane resources of an existing PDU session in an embodiment of the present application;

FIG. 5 is a flowchart illustrating an overview of a method of communication in an embodiment of the present application;

fig. 6 is a second flowchart of an overview of a communication method in an embodiment of the present application;

fig. 7 is a third flowchart of an overview of a communication method in an embodiment of the present application;

FIG. 8 is a flowchart illustrating an exemplary method of communication in accordance with an embodiment of the present application;

fig. 9 is one of processing flowcharts of a conflict between a user plane resource activation procedure initiated by a network side device and a user plane resource activation procedure initiated by a UE for the same PDU session in the embodiment of the present application;

fig. 10 is a second processing flow chart of a conflict between a user plane resource activation procedure initiated by a network side device and a user plane resource activation procedure initiated by a UE for the same PDU session in the embodiment of the present application;

fig. 11 is a third processing flow chart illustrating that a user plane resource activation procedure initiated by a network side device and a user plane resource activation procedure initiated by a UE conflict with each other for the same PDU session in an embodiment of the present application;

fig. 12 is a fourth flowchart of a process of causing a conflict between a user plane resource activation procedure initiated by a network side device and a user plane resource activation procedure initiated by a UE for the same PDU session in the embodiment of the present application;

FIG. 13 is a schematic diagram of an apparatus according to an embodiment of the present application;

fig. 14 is a second schematic structural diagram of an apparatus according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. The terms "first," "second," and the like in the description and claims of the present application and in the foregoing 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 terms so used are interchangeable under appropriate circumstances and are merely descriptive of the various embodiments of the application and how objects of the same nature can be distinguished. 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 elements is not necessarily limited to those elements, but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

In the description of the present application, "/" indicates an OR meaning, for example, A/B may indicate A or B; in the present application, "and/or" is only an association relationship describing an associated object, and means that there may be three relationships, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the present application, "at least one item" means one or more items, and "plural items" means two or more items. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, c may be single or multiple.

The technical scheme of the embodiment of the application can be applied to various communication systems, for example: wideband Code Division Multiple Access (WCDMA) system, general Packet Radio Service (GPRS), long Term Evolution (LTE) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD), universal Mobile Telecommunications System (UMTS), universal mobile telecommunications system (world mobile telecommunications system, UMTS), worldwide Interoperability for Microwave Access (WiMAX) communication system, fifth generation (5 th generation,5 g) system, or future sixth generation communication system, and the like.

Fig. 1A and 1B are schematic diagrams of an architecture of a mobile communication system to which an embodiment of the present application is applied. The terminal equipment is connected with the access network equipment, and the access network equipment is connected with the core network equipment in a wireless or wired mode. The core network device and the access network device may be separate physical devices, or the function of the core network device and the logical function of the access network device may be integrated on the same physical device, or a physical device may be integrated with a part of the function of the core network device and a part of the function of the access network device. The terminal equipment may be fixed or mobile. Fig. 1A and 1B are only schematic diagrams, and other network devices may be included in the communication system.

The core network equipment comprises a session management network element, an access management network element, a user plane function network element and the like.

The session management network element: the method is mainly used for session management, internet Protocol (IP) address allocation and management of the terminal device, selection of a termination point capable of managing a user equipment plane function, policy control or charging function interface, downlink data notification and the like. In 5G communication, the session management network element may be a Session Management Function (SMF) network element, and in future communication such as 6G communication, the session management network element may still be an SMF network element, or have another name, which is not limited in this application. Nsmf is a service-based interface provided by SMF, which may communicate with other network functions through Nsmf.

Accessing a management network element: the present invention is mainly used for mobility management, access management, and the like, and may be, for example, a Mobility Management Entity (MME) function in a 4G communication network or an Access and Management Function (AMF) network element in a 5G network. In future communications, such as 6G communications, the access management network element may still be an AMF network element, or have another name, which is not limited in this application. Namf is a service-based interface provided by the AMF, which may communicate with other network functions through Namf.

User plane functional network element: for packet routing and forwarding, or quality of service (QoS) handling of user plane data, etc. In 5G communication, the user plane network element may be a User Plane Function (UPF) network element, and in future communication such as 6G communication, the user plane network element may still be a UPF network element or have another name, which is not limited in this application.

Access network equipment: the method and the device are used for providing a network access function for authorized user equipment in a specific area, and can use transmission tunnels with different qualities according to the level of the user equipment, the service requirement and the like.

Illustratively, the access network device may be a wired access device or a wireless access device. Radio Access Network (RAN) devices can manage radio resources, provide access services for terminal devices, and then complete forwarding of control signals and user equipment data between a terminal and a core network. For example, the radio access network device may be a base station (base station), an evolved NodeB (eNodeB), a Transmission Reception Point (TRP), a next generation base station (gNB) in a 5G mobile communication system, a base station in a future mobile communication system, or an access node in a WiFi system; the present invention may also be a module or a unit that performs part of the functions of the base station, for example, a Centralized Unit (CU) or a Distributed Unit (DU). The embodiment of the present application does not limit the specific technology and the specific device form adopted by the access network device.

A terminal device may also be referred to as a terminal, user Equipment (UE), a mobile station, a mobile terminal, etc. The terminal device can be a mobile phone, a tablet computer, a computer with a wireless transceiving function, a virtual reality terminal device, an augmented reality terminal device, a wireless terminal in industrial control, a wireless terminal in unmanned driving, a wireless terminal in remote operation, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home and the like. The embodiment of the present application does not limit the specific technology and the specific device form adopted by the terminal device.

The terminal device may be divided into one or more layers (layers), for example, a 5GS session management (5 GS session management,5 gsm) layer and a 5GS mobility management (5 GS mobility management,5 gmm) layer, a quality of Service flow control (QFC) layer, a Radio Resource Control (RRC) layer, and a Service Data Adaptation Protocol (Service Data Adaptation Protocol SDAP) layer. Wherein, the 5GSM layer is responsible for session management of the terminal device. The 5GMM layer is used for being responsible for mobility management of the UE, establishing service connection for an upper layer service request and establishing user plane resources for uplink data transmission request. The QFC layer is responsible for notifying the 5GMM layer when uplink data needs to be transmitted and radio resources have been released or suspended. The RRC layer is responsible for management of radio resources. The RRC layer may also interact with the RAN to complete establishment, modification, release, and the like of a Data Radio Bearer (DRB) of the PDU session. The SADP layer is responsible for completing mapping of quality of service (QoS) flows to DRBs, transmission of user plane data, and the like.

The following describes several specific scenarios in which the UE and the network side device find that a conflict occurs in the PDU session initiation operation when the applicant studies related problems:

scene 1: the UE has registered with the 5G network and the UE is in an idle (idle) state. There is currently a context for an active PDU session. For example, the identification of the PDU Session is PDU Session ID =5. A scenario and a collision processing procedure of a PDU Session, where an identifier of the PDU Session is PDU Session ID =5, are described below, where a user plane resource activation procedure initiated by a network side device collides with a user plane resource activation procedure initiated by a UE for the PDU Session, as shown in fig. 2.

Step 201: the SMF sends an N1N2message transfer (Namf _ Communication _ N1N2 MessageTransfer) message to the AMF.

Illustratively, when the SMF determines that there is downlink data to be sent, the SMF sends an N1N2message transmission message to the AMF.

The N1N2message transmission message includes, for example, one or more of the following: an identity of the UE, a PDU Session ID (e.g., PDU Session ID = 5), session management information (e.g., N2 SM information), or the like. The session management information includes parameters related to the activation of the user plane resource, for example, the parameters related to the activation of the user plane resource may be one or more of the following parameters: PDU Session ID (e.g., PDU Session ID = 5), qoS flow identification, qoS configuration, and the like.

Step 202: the AMF sends an N1N2message transfer response (Namf _ Communication _ N1N2MessageTransfer response) message to the SMF.

If the AMF determines that the UE is in the idle state according to the identity of the UE included in the N1N2message transmission message, the N1N2message transmission response message includes indication information, the indication information is used for indicating that the AMF tries to contact the UE, and/or the indication information is used for indicating that the UE is in the idle state.

Step 203: the AMF sends a paging message to the RAN. Illustratively, the paging message includes an identity of the UE.

Step 204: and the RAN sends the paging message to the UE according to the identity of the UE in the paging message.

Step 205: the UE transmits service request (service request) information to the RAN.

Illustratively, the RRC layer in the UE forwards the paging message to the 5GMM layer in the UE after receiving the paging message in step 204. The 5GMM layer in the UE sends service request information to the RAN via the RRC layer in the UE in response to the paging message, wherein the service request information is used to respond to the paging message in step 203. The service request message does not request activation of the user plane resources of the PDU session ID =5, i.e. the uplink data status (uplink data status) information in the service request message does not indicate the PDU session ID =5.

Step 206: the RAN sends an N2message (N2 message) to the AMF. The N2message includes the service request information in step 205.

Step 207: the AMF sends an update session management context Request (Nsmf _ pdusesion _ UpdateSMConext Request) message to the SMF.

Illustratively, the AMF determines that the UE responds to the paging message sent in step 203 after receiving the N2message in step 206. Since the AMF receives session management information from the SMF in step 201, the AMF knows that the SMF requests to activate user plane resources. Therefore, the AMF sends an update session management context request message to the SMF to trigger the SMF to continue initiating the user plane resource activation procedure.

Step 208: the SMF sends an update session management context Response (Nsmf _ pdusesion _ UpdateSMConext Response) message to the AMF.

It should be noted that after receiving the update session management context request message from the AMF, the SMF may also initiate configuration for the UPF, and the interaction process between the SMF and the UPF in the present application may refer to the prior art, and is not described herein again.

Wherein the update session management context response message includes, for example, one or more of: user plane context state information (upConxState) for indicating a state of a user plane resource of a PDU session ID =5 as being active or session management information. The session management information includes parameters related to the activation of the user plane resources. The session management information here is generated for the user plane resource activation procedure of the SMF-initiated PDU session ID =5 PDU session.

The specific content included in the session management information included in the N1N2message transmission message in step 201 may be the same as or different from the specific content included in the session management information included in the update session management context response message in step 208, which is not limited herein.

Step 209: the AMF sends an N2 Request (N2 Request) message to the RAN. The N2 request message includes, for example, one or more of: a service accept (service accept) message and session management information in step 208.

At this time, the service acceptance message may include a PDU session status. The PDU Session status may indicate that the context of the PDU Session of PDU Session ID =5 is in an active state.

The service acceptance information is used in response to the service request information in step 205.

Step 210A: the RAN sends an RRC connection reconfiguration (RRC connection reconfiguration) message to the UE. The RRC connection reconfiguration message includes service acceptance information and DRB configuration information in step 209.

Accordingly, the RRC layer in the UE receives the RRC connection reconfiguration message from the RAN.

Step 210B: and the RAN sends service acceptance information to the UE, and the RAN sends RRC connection reconfiguration information to the UE, wherein the RRC connection reconfiguration information comprises DRB configuration information.

Correspondingly, the RRC layer in the UE receives the RRC connection reconfiguration message, and also receives the service acceptance information.

Step 210A and step 210B are two possible implementations, and the RAN may perform any one of step 210A and step 210B. In step 210A, the service acceptance information and the DRB configuration information are simultaneously transmitted to the UE. In step 210B, the service acceptance information and the DRB configuration information are transmitted separately, and the transmission order of the service acceptance information and the DRB configuration information is not limited herein. It should be noted that, for the above steps 210A and 210b, the ran determines DRB configuration information according to the Session management information, and the DRB configuration information includes a PDU Session ID (e.g., PDU Session ID = 5).

Step 211: the UE sends an RRC connection reconfiguration complete (RRC connection reconfiguration complete) message to the RAN. Wherein, the RRC layer in the UE sends RRC connection reconfiguration complete information to the RAN.

And the RAN determines that the user plane resources of the PDU Session with the PDU Session ID =5 are activated according to the RRC connection reconfiguration complete message.

After step 211, the signaling interaction procedure inside the UE is as follows:

step 212: the RRC layer in the UE sends a DRB configuration message to the SDAP layer.

Step 213: the RRC layer in the UE sends service acceptance information to the 5GMM layer in the UE.

Step 214: the SDAP layer in the UE sends a Radio resource establishment indication (Radio resource establishment indication) message to the QFC layer in the UE. The radio resource establishment indication message is used to inform that the user plane resources of the PDU Session of QFC layer PDU Session ID =5 are activated. The radio resource establishment indication message includes a PDU Session ID (e.g., PDU Session ID = 5).

Step 215: after the 5GMM layer in the UE receives the service acceptance information (i.e., step 214), the 5GMM layer in the UE determines that the Radio resource establishment request (Radio resource acknowledgement request) message has been cached, and then the 5GMM layer in the UE sends the service request information to the RAN. Wherein, the 5GMM layer in the UE sends the service request information to the RAN through the RRC layer in the UE. The service request information includes uplink data status information indicating a PDU Session ID (e.g., PDU Session ID = 5). Wherein the uplink data status information indicates PDU Session ID =5, indicating that the UE requests to activate the user plane resources of the PDU Session with PDU Session ID =5.

After step 205 and before step 215, if the UE has uplink data to transmit, the QFC layer in the UE transmits a radio resource establishment request message to the 5GMM layer in the UE, where the radio resource establishment request message includes a PDU Session ID (e.g., PDU Session ID = 5).

From the perspective of the 5GMM layer in the UE, since the 5GMM layer in the UE does not receive the response information for the service request message sent in step 205, the 5GMM layer in the UE buffers the radio resource establishment request message until the 5GMM layer in the UE receives the service acceptance message, and then the 5GMM layer in the UE sends the service request message to the RAN through the RRC layer in the UE.

From the perspective of the QFC layer in the UE, the QFC layer in the UE sends a radio resource establishment request message to the 5GMM layer in the UE before step 215, although it also receives a radio resource establishment indication message sent from the SDAP layer in the UE (i.e., step 214). Therefore, the QFC layer in the UE has sent the radio resource establishment request message when determining that the PDU session ID of the PDU session requesting user plane resource establishment is the same as the PDU session ID of the PDU session having activated the user plane resource.

Meanwhile, since the RRC layer in the UE notifies only the SDAP layer of the PDU Session ID =5 (through the DRB configuration message), and does not notify the 5GMM layer in the UE of the PDU Session ID =5 (i.e., the service acceptance information does not include the PDU Session ID), transmission of the service acceptance information to the 5GMM layer in the UE by the RRC layer in the UE is independent from transmission of the DRB configuration message to the SDAP layer by the RRC layer in the UE. Therefore, since the QFC layer does not have to be revoked to send the radio resource establishment request message to the 5GMM layer in the UE, when the 5GMM layer in the UE receives the service acceptance information (i.e., step 215), the 5GMM layer in the UE sends the service request information to the RAN through the RRC layer in the UE (i.e., step 216), which results in a scenario where the UE and the network side device conflict with each other in activation of the same PDU session (e.g., PDU session ID = 5) requesting user plane resources.

It can be understood that, as shown in step 212 and step 213, the RRC layer in the UE sends a message to different layers, so that step 212 and step 213 are independent from each other, and the timing relationship between step 212 and step 213 is not limited herein. Further, the SDAP layer in the UE, in response to step 212, performs step 214. The 5GMM layer in the UE responds to step 213 and performs step 215 when it is determined to buffer the radio resource establishment request message. Therefore, step 214 and step 215 are also independent of each other, and the timing relationship between step 214 and step 215 is not limited here.

It should be noted that, after step 211, the signaling interaction flow between the network side devices is as shown in steps a to C: step A: the RAN sends an N2 Request acknowledgement (N2 Request ACK) message to the AMF. The N2 request acknowledgement message includes session management information, and the session management information includes a list of successful activation of user plane resources of the PDU session (including a PDU session ID, etc.). At this time, the list of user plane resource activation successes for the PDU Session indicates that the user plane resource activation successes for the PDU Session ID =5. And B: the AMF sends an update session management context request message to the SMF after receiving the N2 request acknowledge message. The update session management context request message includes the session management information in the N2 request acknowledge message. And C: and the SMF determines that the user plane resource activation of the PDU Session with the PDU Session ID =5 is successful according to the Session management information in the Session management context updating request message. The SMF configures the UPF. The SMF sends an update session management context response message to the AMF to respond to the update session management context request message sent by the AMF. The update session management context response message includes user plane context state information indicating that the state of the user plane resources of the PDU session ID =5 is activated.

It can be understood that the signaling interaction procedure between the network side devices shown in steps a to C is independent from the signaling interaction procedure inside the UE.

Step 216: the RAN sends an N2message to the AMF. The N2message includes the service request message in step 215.

It should be noted that the RAN directly passes through the service request in step 215 to the AMF. Thus, the RAN fails to find in step 216 that the UE requests the user plane resource activated PDU session to be the same PDU session as the one for which the user plane resources have been activated.

Step 217: the AMF sends an update session management context request message to the SMF.

The AMF determines, according to the service request information in step 202, that the UE requests to activate the user plane resource of the PDU Session with PDU Session ID =5. The update session management context request message includes user plane context state information for indicating a state of a user plane resource of the PDU session ID =5 as being activated.

Step 218: the SMF sends an update session management context response message to the AMF.

And the SMF determines the user plane resource of the PDU session with the PDU session ID =5 requested to be activated by the UE according to the user plane context state information in the session management context updating request message.

Illustratively, the update session management context response message includes, for example, one or more of: user plane context state information or session management information (e.g., N2 SM information), the user plane context state information is used to indicate that the state of the user plane resource of the PDU session with PDU session ID =5 is active, the session management information includes the relevant parameters of the user plane resource activation of the PDU session with PDU session ID =5, for example, the relevant parameters of the user plane resource activation herein may include, but are not limited to, one or more of the following: PDU Session ID (e.g., PDU Session ID = 5), qoS flow identification, qoS configuration, etc. The session management information here is generated for the user plane resource activation procedure of the UE-initiated PDU session ID =5 PDU session.

Step 219: the AMF sends an N2 request message to the RAN. The N2 request message includes, for example, one or more of: service acceptance information or session management information in step 218.

The AMF determines service acceptance information from the update session management context response message in step 218. Illustratively, the service acceptance information includes a PDU session activation result (PDU session activation result) indicating that the user plane resource activation of the PDU session is successful. For example, if the bit position corresponding to the PDU session ID =5 is 0, it indicates that the user plane resource activation of the PDU session with the PDU session ID =5 is successful. Wherein the service acceptance information is used in response to the service request information of step 216.

It should be noted that, for steps 217 to 219, the amf and the SMF do not sense whether the PDU session in which the UE requests the activation of the user plane resource is the same as the PDU session in which the user plane resource is already activated.

Step 220: the RAN sends an N2 request acknowledge message to the AMF.

The RAN determines, according to the Session management information in the N2 request message in step 219, that the user plane resource needs to be activated for the PDU Session with PDU Session ID =5, and the RAN determines that the user plane resource for the PDU Session with PDU Session ID =5 is activated (which may be determined in step 211). Therefore, the RAN sends an N2 request acknowledgement message to the AMF, where the N2 request acknowledgement message includes session management information including a list of user plane resource activation failures for the PDU session (including a PDU session ID, a failure cause value, etc.). At this time, the list of the user plane resource activation failure of the PDU Session indicates the user plane resource activation failure of the PDU Session with PDU Session ID =5.

The RAN sends service acceptance information to the UE. The timing relationship between the RAN sending the N2 request ACK message to the AMF and the service acceptance information to the UE is not limited herein.

Step 221: the AMF sends an update session management context request message to the SMF. The update session management context request message includes the session management information in step 220.

Step 222: after receiving the Session management context update request message, the SMF determines that the activation of the user plane resource of the PDU Session with PDU Session ID =5 fails according to the Session management information in the Session management context update request message, and releases the PDU Session with PDU Session ID =5 or deactivates the user plane resource activated for the PDU Session with PDU Session ID =5.

As can be seen, for the conflict scenario of scenario 1, when the UE is in an idle state, and the user plane resource activation procedure initiated by the network side device and the user plane resource activation procedure initiated by the UE are directed to the same PDU session, the SMF may deactivate the activated user plane resource of the PDU session, even cause the PDU session to be released, thereby affecting the service process and the user experience of the user.

Scene 2: the UE has registered with the 5G network and the UE is in a connected (connected) state. There is currently a context for one active PDU session, but the user plane resources for that PDU session are not active. For example, the identification of the PDU Session is PDU Session ID =5. The following describes a scenario and a collision processing procedure when a PDU Session identifier is PDU Session ID =5, where a network-initiated user plane resource activation procedure and a UE-initiated user plane resource activation procedure collide with each other for the PDU Session, as shown in fig. 3.

Step 301: the SMF sends an N1N2 messaging message to the AMF.

The N1N2message transmission message includes, for example, one or more of the following: an identity of the UE, a PDU Session ID (e.g., PDU Session ID = 5), session management information, and the like. The specific content included in the session management information may refer to the related description in step 201.

Step 302: the AMF sends an N1N2 messaging response message to the SMF.

If the AMF determines that the UE is in a connected state according to the identity of the UE included in the N1N2message transmission message, the N1N2message transmission response message is used for responding to the N1N2message transmission message.

Step 303: the AMF sends an update session management context request message to the SMF.

Since the AMF receives session management information from the SMF in step 301, the AMF learns that the SMF requests activation of user plane resources. Therefore, the AMF sends an update session management context request message to the SMF, which includes location information of the UE for selection of UPF by the SMF, I-UPF relocation, and the like.

Step 304: the SMF sends an update session management context response message to the AMF.

Wherein the update session management context response message may refer to the relevant description in step 208. It can be understood that the session management information at this time is activated for the user plane resources of the SMF-initiated PDU session ID =5 PDU session.

In a possible implementation manner, if the session management information in step 301 is not changed, the SMF may not carry the session management information in the update session management context response message.

The specific content included in the session management information included in the N1N2message transmission message in step 301 may be the same as or different from the specific content included in the session management information included in the update session management context response message in step 304, which is not limited herein. The session management information here is generated for the user plane resource activation procedure of the SMF-initiated PDU session ID =5 PDU session.

Step 305: the AMF sends an N2 request message to the RAN. Wherein the N2 request message includes session management information.

In a possible implementation manner, the session management information carried in the N2 request message may be session management information carried in an N1N2message transmission message received by the AMF from the SMF in step 301. In this case, steps 303 and 304 may be performed, but no session management information is carried in step 304; or step 303 and step 304 may not be performed. Step 305 may also be performed between step 301 and step 302, when the N1N2 messaging response message sent by the AMF to the SMF in step 302 is also used to indicate that the session management information has been sent.

In another possible implementation manner, the session management information carried in the N2 request message may be the session management information carried in the update session management context response message received by the AMF from the SMF in step 304. For example, if the AMF receives the session management information in both step 301 and step 304, the N2 request message sent by the AMF to the RAN carries the session management information received in step 304.

Step 306: the RAN sends an RRC connection reconfiguration message to the UE. Accordingly, the RRC layer in the UE receives the RRC connection reconfiguration message from the RAN.

The RAN determines DRB configuration information from the Session management information, the DRB configuration information including a PDU Session ID (e.g., PDU Session ID = 5). The RRC connection reconfiguration message includes DRB configuration information.

Step 307: the UE sends an RRC connection reconfiguration complete message to the RAN.

Wherein, the RRC layer in the UE sends RRC connection reconfiguration complete information to the RAN.

Step 308: the RRC layer in the UE sends a DRB configuration message to the SDAP layer.

Step 309: and the SDAP layer in the UE sends a radio resource establishment indication message to the QFC layer in the UE. The radio resource establishment indication message includes a PDU Session ID (e.g., PDU Session ID = 5). The radio resource establishment indication message is used to inform that the user plane resources of the PDU Session of QFC layer PDU Session ID =5 are activated.

Step 310: before step 309, if there is uplink data to be sent by the UE, the QFC layer in the UE sends a radio resource establishment request message to the 5GMM layer in the UE, triggering the UE to send a service request message to the RAN. Wherein, the 5GMM layer in the UE transmits the service request information to the RAN through the RRC layer in the UE. The service request information includes uplink data status information indicating a PDU Session ID (e.g., PDU Session ID = 5).

It should be noted that step 310 is not necessarily after step 309, and may also be before step 309, and the QFC layer in the UE sends the radio resource establishment request message to the 5GMM layer in the UE before step 309.

Therefore, before the UE initiates the user plane resource activation procedure for a certain PDU session, it is not known that the network side device completes the user plane resource activation for the PDU session, and the user plane resource activation procedure initiated by the network side device for the same PDU session conflicts with the user plane resource activation procedure initiated by the UE.

It should be noted that after step 306, the signaling interaction flow between the network side devices is shown in steps a to C, and the specific content thereof may refer to the related description in scene 1 (shown in fig. 2), and repeated details are not repeated. It is understood that the signaling interaction flow between the network side devices shown in steps a to C is independent from steps 308 to 310.

Step 311 to step 317 refer to step 216 to step 222 in scenario 1 (as shown in fig. 2), and repeated details are not repeated.

As can be seen, for the conflict scenario of scenario 2, when the UE is in a connected state, and the user plane resource activation procedure initiated by the network side device and the user plane resource activation procedure initiated by the UE are directed to the same session, the SMF may deactivate the activated user plane resource of the PDU session, and even cause the PDU session to be released, thereby affecting the service process and user experience of the user.

It should be noted that, in this embodiment of the present application, the user plane resource is a resource established between the terminal device and the user plane function network element. The user plane resource may comprise one of the following resources:

for a PDU session established by a terminal device through 3GPP access technology, the resources of the user plane may include one or more of the following: user plane radio bearers over the Uu reference point, tunnels over the N3 reference point, and tunnels over the N9 reference point (if any);

for a PDU session established by a terminal device over an untrusted non-3 GPP access technology, the resources of the user plane may include one or more of: an internet protocol security (IPsec) tunnel over an NWu reference point, a tunnel over an N3 reference point, and a tunnel over an N9 reference point (if any); wherein, NWu is a reference point between the terminal device and the non-3 GPP interworking function, for establishing a secure tunnel between the UE and the non-3 GPP interworking function so that the exchange of the control plane and the user plane between the terminal device and the 5G core network is securely transmitted through the untrusted non-3 GPP access;

for a PDU session established by a terminal device via a trusted non-3 GPP access technology, the resources of the user plane may include one or more of: an IPsec tunnel over NWt reference point, a tunnel over N3 reference point, and a tunnel over N9 reference point (if any); the NWt is a reference point between the terminal device and the non-3 GPP gateway function, and a secure NWt connection is established at the reference point, so that a Non Access Stratum (NAS) message between the terminal device and the AMF can be transmitted through the NWt connection.

In addition, the meaning of the user plane connection and the user plane resource is the same in the embodiment of the application, and in addition, the activation of the user plane resource can be equal to the establishment of the user plane resource.

Currently, a Network Function (NF) service consumer (e.g., AMF) may request the SMF to activate a user plane resource of a PDU session, e.g., request the SMF to establish AN N3 tunnel between a 5G Access Network (AN) and a UPF, as shown in fig. 4 below.

Step 401.

Illustratively, prior to step 401, if the SMF needs to send downlink data, the SMF may initiate activation of user plane resources for the PDU session.

The first POST message is for a user plane resource that the NF service consumer requests to activate the PDU session, wherein the first POST message may include an upCnxState attribute that is set to be active. It is understood that the first POST message may also include other information, which is not described herein.

Step 402: after receiving the first POST message in step 401, if the SMF can continue to activate the user plane resources of the PDU session, the SMF may return a response message containing 200OK, which may include one or more of the following information:

a: the upCnxState attribute is set to be active;

b: session management information (e.g., N2 SM information) requesting AN access network device (e.g., 5G-AN) to allocate resources for the PDU session, which may include, for example, the transport layer address of the uplink termination point and the tunnel endpoint for the user plane data of the PDU session.

Step 403: if the SMF returns a 200OK response message, the NF service consumer (e.g., AMF) may then send a second POST message that includes session management information (e.g., N2 SM information) that contains the following information:

if activation of user plane resources for the PDU session by the 5G-AN is successful, the session management information includes transport layer addresses and tunnel endpoints of one or more downlink endpoints, and/or AN associated list of QoS flows for the PDU session, or,

if the 5G-AN fails to activate the user plane resources for the PDU session, the session management information includes AN indication of the failure, and optionally, a reason for the failure of the user plane resource activation.

After receiving the second POST message in step 403, the SMF performs the following operations according to the session management information included in the second POST message:

if the 5G-AN successfully activates the user plane resources for the PDU session, the upCnxState attribute is set to be activated.

And if the 5G-AN fails to activate the user plane resources for the PDU session, the UPCnxState attribute is set to be deactivated.

Step 404: the SMF returns a response message including a 200OK, which includes an upCnxState attribute indicating the final state of the user plane resource.

The upCnxState attribute of the final state of the user plane resource may be determined in step 403, which is not described herein again.

In some embodiments, after the SMF sends the response message containing the 200OK in step 402 and before the SMF receives the second POST message in step 403, the SMF may also receive a third POST message from the NF service consumer, the third POST message requesting activation of the user plane resources for the PDU session. When the PDU session corresponding to the user plane resource requested to be activated by the first POST message is the same as the PDU session corresponding to the user plane resource requested to be activated by the third POST message, the SMF finds that the user plane resource of the PDU session is being activated, and then the SMF returns a 200OK response message, wherein the 200OK response message comprises the upCnxState, the attribute of the upCnxState is set to be activated, and the 200OK response message does not comprise session management information (for example, N2 SM information) requesting 5G-AN to allocate resources for the PDU session.

In some embodiments, after the SMF receives the second POST message in step 403, the SMF may also receive a third POST message, which is used to request activation of user plane resources for the PDU session. When the SMF determines that the PDU session activates the user plane resource successfully according to the second POST message, and the PDU session corresponding to the user plane resource requested to be activated by the first POST message is the same as the PDU session corresponding to the user plane resource requested to be activated by the third POST message, the SMF finds that the user plane resource of the PDU session is already activated, the SMF returns a 200OK response message, the 200OK response message comprises the UPCnxState, and the attribute of the UPCnxState is set to be activated.

The third POST message may include an upCnxState attribute, and the upCnxState attribute is set to be activated. Illustratively, the third POST message here may be the UE triggering the NF service consumer to send to the SMF. It is understood that the third POST message may also include other information, which is not described in detail herein.

The following example, shown in fig. 5, further illustrates the above process.

Based on the above problems in scenario 1 (shown in fig. 2) and scenario 2 (shown in fig. 3), the embodiment of the present application provides a communication method. By adopting the method provided in the embodiment of the present application, if the session management function network element receives a first message requesting the session management function network element to activate the user plane resource of the first session under the condition that a procedure of activating the user plane resource of the first session has been initiated, the session management function network element may actively determine a state of the user plane resource of the first session, and when the state of the user plane resource of the first session is being activated or activated, the session management function network element sends a second message to the access and mobility management function network element, where the second message may be used to indicate that the activation of the user plane resource of the first session is successful or failed, and may further notify the terminal device that the activation of the user plane resource of the first session is successful or failed, so that a problem that the activated user plane resource is deactivated or a PDU session is released when the terminal device and a network side device initiate an operation on the same PDU session can be solved, as shown in fig. 5, the method includes:

step 501: and the access and mobility management function network element sends a first message to the session management function network element, wherein the first message is used for requesting the session management function network element to activate the user plane resource of the first session.

It can be understood that, when the terminal device needs to transmit uplink data, the terminal device initiates a process of establishing a user plane resource of the first session, so as to request to activate the user plane resource of the first session. After the user plane resource of the first session is established, the terminal device may transmit uplink data using the established user plane resource of the first session.

In some embodiments, the terminal device sends a service request message to the access and mobility management function network element (i.e. step 503) before the access and mobility management function network element sends the first message to the session function management network element, the service request message including uplink data state information, the uplink data state information including an identification of the first session. The service request message is used for the terminal equipment to request to activate the user plane resource of the first session. Further, the access and mobility management function network element sends the first message to the session management function network element according to the service request message.

Illustratively, the first message may be an update session management context request message, and the first message may include state indication information indicating that a state of a user plane resource of the first session is active.

Step 502: and under the condition that the process of activating the user plane resources of the first session is initiated, the session management function network element sends a second message to the access and mobility management function network element.

Illustratively, the session management function network element may determine that a flow of activating user plane resources for the first session has been initiated.

The session management function network element determining that the activation of the user plane resource of the first session has been initiated includes, but is not limited to, the following two cases:

case 1: the session management function network element determines the status of the user plane resource of the first session as being active.

Exemplarily, the session management function network element may determine, according to the first user plane context state information corresponding to the first session, that the state of the user plane resource of the first session is being activated; wherein the first user plane context state information indicates that the state of the user plane resource of the first session is active.

The session management function network element may locally maintain information of a state of a user plane resource of the PDU session, that is, first user plane context information, where the state of the user plane resource of the PDU session may include: active, activated or deactivated, etc.

In a possible implementation manner, the state indication information is the same as the first user plane context state information, and the session management function network element may obtain the first user plane context state information maintained locally, and then send the state indication information to the access and mobility management function network element. In another possible implementation manner, the session management function network element obtains first locally maintained user plane context state information, and determines the content of the state indication information according to the first user plane context state information. It should be noted that, in the embodiment of the present application, the first status indication information, the second status indication information, the third status indication information, and the like, which are referred to below, may be understood as different values of the same cell.

In some embodiments, before the access and mobility management function network element sends the first message to the session management function network element, the method further includes that, when the session management function network element determines that downlink data needs to be sent, the session management function network element may trigger activation of a user plane resource of the first session, for example, refer to steps 301 to 303 in fig. 3 or steps 201 to 207 in fig. 2. Then, the session management function network element sends a third message to the access and mobility management function network element (i.e., step 504), where the third message includes first status indication information, and the first status indication information is used to indicate that the status of the user plane resource of the first session is active. Illustratively, the third message may be an update session management context response message.

The third message may further include first session management information including a parameter related to activating the user plane resource of the first session. After the access and mobility management function network element receives the third message (i.e., step 504), the access and mobility management function network element sends the first session management information to the access network device (i.e., step 505), so that the access network device establishes a DRB bearer corresponding to the first session according to the first session management information. Specifically, the access network device sends an RRC reconfiguration message to the terminal device (i.e., step 506), for example, the RRC connection reconfiguration message is used to establish the DRB bearer of the first session. The terminal device sends an RRC connection reconfiguration complete message to the access network device (i.e., step 507), for example, the RRC connection reconfiguration complete message is used to indicate that the DRB bearer of the first session is successfully established.

It will be appreciated that the session management function network element has sent the third message to the access and mobility management function network element before the session management function network element receives the first message, and therefore the session management function network element has initiated a procedure to establish user plane resources for the first session.

For example, when the session management function network element determines that downlink data needs to be sent, the session management function network element triggers activation of a user plane resource of the first session, which may refer to step 201 to step 207 in fig. 2 or step 301 to step 303 in fig. 3, for example. After receiving, for example, step 207 or step 303, the session management function network element may initiate a configuration for the user plane function network element, and after the configuration for the user plane function network element is successful, the session management function network element may update the information that locally maintains the state of the user plane resource of the first session, that is, the state of the user plane resource of the first session is updated from deactivation to being activated. And the session management function network element sends a third message to the access and mobility management function network element according to the information of the state of the user plane resource of the first session, wherein the third message comprises first state indication information, and the first state indication information is used for indicating that the state of the user plane resource of the first session is being activated. Wherein the session management function network element sends the third message to the access and mobility management function network element (i.e. step 504), which may refer to step 208 in fig. 2 or step 304 in fig. 3 described above. If the session management function network element is after receiving the first message (for example, refer to step 217 in fig. 2 or step 312 in fig. 3), the session management function network element determines that the state of the user plane resource of the first session is active according to the information of the state of the user plane resource of the first session. Furthermore, it should be noted that, if the session management function network element has not received the second session management information from the access network device before receiving the first message (i.e. step 508), that is, step 508 is after step 501, and the second session management information indicates that the activation of the user plane resource of the first session is successful, for example, step 508 may refer to step a and step B in fig. 2 or step a and step B in fig. 3, the session management function network element determines the state of the user plane resource of the first session as being activated according to the information of the state of the user plane resource of the first session.

It can be understood that, in the present application, reference may be made to the prior art for the interaction process between the session management function network element and the user plane function network element, and details are not described here again.

Case 2: the session management function network element determines the status of the user plane resource of the first session as activated.

Illustratively, before the session management function network element receives the first message, the session management function network element further receives second session management information from the access network device (i.e. step 508), the second session management information indicating that the activation of the user plane resource of the first session is successful; or, the session management function network element caches the first message in step 501 until receiving second session management information from the access network device, where the second session management information is used to indicate that the user plane resource activation of the first session is successful. The access network device may send the second session management information to the session management function network element via the access and mobility management function network element, for example. The session management functional network element may determine that the state of the user plane resource of the first session is activated according to the second session management information. Further, after step 508, the session management function network element may send a response message including 200OK to the access and mobility management function network element, where the response message including 200OK includes status indication information indicating that the status of the user plane resource of the first session is activated, for example, refer to step C in fig. 2 or step C in fig. 3.

It will be appreciated that the session management function network element has received the second session management information from the access network device before the session management function network element receives the first message, i.e. step 508 is before step 501, and thus the session management function network element has completed the process of establishing the user plane resources of the first session.

In addition, the session management function network element may further update the information for locally maintaining the state of the user plane resource of the first session according to the second session management information, that is, the state of the user plane resource of the first session is updated from being activated to being activated.

Further, after step 502, the access and mobility management function network element sends a service accept message to the terminal device (i.e. step 509).

In some embodiments, the second message may be used to indicate that the user plane resource activation of the first session was successful. The second message and the corresponding service acceptance message are explained below in connection with case 1 and case 2 above.

Case 1: and after the session management function network element determines that the state of the user plane resource of the first session is being activated, the session management function network element sends a second message to the access and mobility management function network element, wherein the second message is used for indicating that the activation of the user plane resource of the first session is successful. The second message may be an update session management context response message, and the second message includes second status indication information, and does not include a parameter related to activating the user plane resource of the first session, and the second status indication information indicates that the status of the user plane resource of the first session is being activated.

The second message may also include a first cause value indicating that the user plane resource of the first session is being activated.

Case 2: and after the session management function network element determines that the state of the user plane resource of the first session is activated, the session management function network element sends a second message to the access and mobility management function network element, wherein the second message is used for indicating that the activation of the user plane resource of the first session is successful. For example, the second message is an update session management context response message, and the second message includes third state indication information indicating that the state of the user plane resource of the first session is activated.

The second message may also include a second cause value indicating that the user plane resource of the first session is activated.

Correspondingly, corresponding to the above cases 1 and 2, the access and mobility management function network element sends a service acceptance message to the terminal device, where the service acceptance message includes an information element for indicating a PDU session activation result, where the information element for indicating the PDU session activation result indicates that the activation of the user plane resource of the first session is successful.

Further, the terminal device may determine that the user plane resource activation of the first session is successful according to the service acceptance message.

In some embodiments, the second message may also be used to indicate a failure of user plane resource activation for the first session, the second message including a first cause value indicating a reason for the failure of user plane resource activation for the first session. The second message and the corresponding service acceptance message are explained below in connection with case 1 and case 2.

After the session management function network element determines that the state of the user plane resource of the first session is being activated according to the first message, the session management function network element sends a second message to the access and mobility management function network element, where the second message is used to indicate that the activation of the user plane resource of the first session fails, and the first cause value indicates that the user plane resource of the first session is being activated (corresponding to case 1) or is activated (corresponding to case 2). Illustratively, the second message is a second update session management context response message, the second message including second state indication information and a first cause value, the second state indication information indicating that the state of the user plane resource of the first session is active (corresponding to case 1) or activated (corresponding to case 2).

Correspondingly, the access and mobility management function network element sends a service acceptance message to the terminal equipment, wherein the service acceptance message comprises an information element for indicating the PDU session activation result, or the service acceptance message comprises an information element for indicating the PDU session activation result and an information element for indicating the error reason of the PDU session activation result, the information element for indicating the PDU session activation result indicates the failure of the activation of the user plane resources of the first session, and the information element for indicating the error reason of the PDU session activation result indicates the failure of the activation of the user plane resources of the first session. Illustratively, the reason for the failure of the activation of the user plane resource of the first session is that the user plane resource of the first session is being activated (corresponding to case 1) or has been activated (corresponding to case 2).

Further, the terminal device queries the state of the user plane resource of the first session according to the service acceptance message, and when the terminal device determines that the state of the user plane resource of the first session is activated, the terminal device determines that the activation of the user plane resource of the first session is successful. When the terminal device determines that the state of the user plane resource of the first session is deactivated, the terminal device releases the first session, and it can be understood that releasing the first session here can be understood as releasing the first session in the signaling plane. In addition, the terminal device may reactivate the first session after the terminal device releases the completed first session.

By adopting the method, the session management function network element can actively judge the state of the user plane resource of the first session after receiving the first message, when the state of the user plane resource of the first session is activated or is being activated, the session management function network element sends a second message to the access and mobility management function network element, and the access and mobility management function network element sends a service acceptance message to the terminal equipment according to the second message. Therefore, the activated user plane resource can be prevented from being deactivated or the first session can be prevented from being released, and the service experience of the user can be improved.

Based on the problem in the above scenario 1 (as shown in fig. 2), an embodiment of the present application provides a communication method, where when a first session is a session in which a user plane resource is activated, an access and mobility management function network element may add an identifier of the first session to a first service acceptance message, and a terminal device may cancel a procedure of requesting activation of the user plane resource of the first session according to the first service acceptance message, so as to avoid a problem that the terminal device and the session management function network element conflict with each other when initiating activation of the user plane resource for the same PDU session. As shown in fig. 6, the method includes:

step 601: and the access and mobility management function network element sends a paging message to the terminal equipment.

Step 602: and the terminal equipment sends a first service request message to an access and mobility management function network element.

Illustratively, the first service request message is for responding to a paging message. The first service request message does not request activation of the user plane resources of the first session, i.e. the uplink data state information in the first service request message does not indicate the identity of the first session.

Specific contents of step 601 and step 602 and the related paging process thereof, a possible implementation manner may refer to step 201 to step 207 in the above scenario 1 (as shown in fig. 2), that is, when it is determined that downlink data needs to be sent to the terminal device, a part where the network side triggers initiating paging process repetition for the terminal device is not described again.

Step 603: the terminal equipment starts a flow for requesting to activate the user plane resource of the first session.

The terminal equipment comprises a mobility management layer, a service quality flow control layer, a wireless resource control layer and a service data adaptation protocol layer.

The process of the terminal device starting the user plane resource of the request for activating the first session specifically includes that the mobility management layer receives a radio resource establishment request message from the qos traffic control layer, where the radio resource establishment request message is used to request to activate the user plane resource of the first session, and the radio resource establishment request message includes an identifier of the first session. The mobility management layer buffers the radio resource establishment request message. For example, as shown in fig. 2, after step 205 and before step 215, if the terminal device has uplink data to send, the qos layer sends a radio resource establishment request message to the mobility management layer.

Step 604: and the session management function network element sends a first message to the access and mobility management function network element, wherein the first message comprises state indication information, and the state indication information is used for indicating that the state of the user plane resource of the first session is activated.

Illustratively, the first message is an update session management context response message. The first message comprises session management information comprising relevant parameters for activating user plane resources of the first session. And the access and mobility management function network element sends the session management information to the access network equipment.

For example, step 604 may correspond to step 208 in fig. 2 described above, and the step 209 in fig. 2 described above may be performed by the network element of the access and mobility management function sending the session management information to the access network device.

Step 605: and the access and mobility management function network element sends a first service acceptance message to the terminal equipment, wherein the first service acceptance message comprises the identification of the first session.

Exemplarily, the access and mobility management function network element determines that the first service request message does not request to activate the user plane resource of the first session, and receives the first message carrying the state indication information that the state of the user plane resource of the first session is being activated, and then the access and mobility management function network element sends a first service acceptance message carrying the identifier of the first session to the terminal device. For example, the first service accept message includes a new information element, which is used to indicate the session in which the user plane resource is activated, and in this embodiment, the new information element may be specifically used to indicate the identity of the first session.

Illustratively, the access and mobility management function network element generates a first service accept message comprising an identification of the first session according to the status indication information in step 604.

Step 606: the terminal equipment cancels the flow of requesting to activate the user plane resource of the first conversation.

And the terminal equipment acquires that the first session is the session with the activated user plane resources according to the service receiving message, and cancels the flow of requesting to activate the user plane resources of the first session.

Illustratively, as can be seen from the content in fig. 2, the access and mobility management function network element sends a service reception message and a DRB configuration message to the radio resource control layer in the terminal device through the access network device, and further, the radio resource control layer sends DRB configuration information to the service data adaptation protocol layer (e.g., step 212), where the DRB configuration information may indicate that the user plane resources of the first session are activated, but the radio resource control layer sends a service reception message to the mobility management layer (e.g., step 213), where the service reception message does not indicate that the user plane resources of the first session are activated. Therefore, when the mobility management layer receives the service acceptance information, the mobility management layer fails to know that the user plane resource of the first session is activated, and if the mobility management layer has cached the radio resource establishment request message for requesting activation of the user plane resource of the first session, the mobility management layer sends the service request information for requesting activation of the user plane resource of the first session to the access network device (for example, step 215), thereby causing a scenario that the terminal device and the network side device conflict with each other in terms of activation of the user plane resource requested by the same PDU session. In the method provided by the embodiment of the present application, because the first service acceptance message includes a new cell, where the new cell is used to indicate a session (for example, a first session) in which the user plane resource is activated, when the mobility management layer receives the first service acceptance message, the mobility management layer may determine whether the session in which the user plane resource indicated by the cell is activated is the same as the session in which the buffered radio resource establishment request message requests activation of the user plane resource, and if so, cancel the flow of requesting activation of the PDU session, that is, the user plane resource of the first session is already activated, and it is not necessary to initiate activation of the user plane resource of the first session again. Otherwise, the mobility management layer continues to request activation of the user plane resources for the first session. Therefore, the method provided by the embodiment of the application can avoid the situation that the terminal equipment and the network side equipment conflict with the activation of the same PDU session request user plane resource, and can save the signaling overhead between the terminal equipment and the network side equipment.

For example, it should be noted that, if the session management network element sends a plurality of first messages to the access and mobility management function network element, that is, the network side triggers activation of user plane resources of a plurality of sessions, the first service acceptance message may include identifiers of the plurality of sessions, and the plurality of sessions are sessions in which the user plane resources are activated. And when the terminal equipment determines that the identifications of the plurality of sessions comprise the identification of the first session after receiving the first service acceptance message, the terminal equipment cancels the flow of requesting to activate the user plane resource of the first session.

Exemplarily, the procedure that the terminal device cancels the request for activating the user plane resource of the first session comprises that the terminal device does not send a second service request message to the access and mobility management function network element, and the second service request message is used for requesting for activating the user plane resource of the first session. Specifically, the mobility management layer clears the cached radio resource establishment request message, and then the mobility management layer does not send the second service request message to the access and mobility management function network element.

By adopting the method, the access and mobility management function network element adds the identification of the session management function network element for activating the user plane resource into the service receiving message, and the terminal equipment can cancel the flow of the local terminal for requesting to activate the user plane resource of the first session when the identification of the session management function network element for activating the user plane resource comprises the identification of the first session, so that the problem that the terminal equipment and the session management function network element conflict with each other when initiating the user plane resource activation of the same PDU session, and meanwhile, the situation that the user plane resource which is being activated is deactivated or the PDU session is released is avoided, the user service experience is improved, and the signaling interaction between the terminal equipment and the network side equipment can be reduced.

Based on the above-mentioned problems in scenario 1 (as shown in fig. 2) and scenario 2 (as shown in fig. 3), an embodiment of the present application provides a communication method, where, in a case that a procedure of activating a user plane resource of a first session has been initiated, an access and mobility management functional network element receives a service request message requesting activation of the user plane resource of the first session, that is, a terminal device and the session management functional network element conflict with each other in activation of the user plane resource of the same PDU session, and the access and mobility management functional network element actively determines a state of the user plane resource of the first session, and when the state of the user plane resource of the first session is active or activated, the access and mobility management functional network element sends a service acceptance message to the terminal device, where the service acceptance message indicates that activation of the user plane resource of the first session is successful or activation of the user plane resource of the first session is failed, so as to solve a problem that a UE and a network-side device conflict with an operation of the same PDU session initiation operation, which causes the activated user plane resource to be released or a PDU session to be released, as shown in fig. 7, the method includes:

step 701: and the terminal equipment sends a first message to the access and mobility management function network element, wherein the first message is used for requesting to activate the user plane resource of the first session by the terminal equipment.

Illustratively, the first message is a service request message that includes uplink data state information indicating an identity of the first session.

Step 702: and under the condition that the process of activating the user plane resources of the first session is initiated, the access and mobility management function network element sends a second message to the terminal equipment, wherein the second message indicates the failure of the activation of the user plane resources of the first session, the second message comprises a first reason value, and the first reason value indicates the reason of the failure of the activation of the user plane resources of the first session. Alternatively, the second message indicates that the user plane resource activation of the first session was successful.

For example, the procedure of the access and mobility management function network element determining that the activation of the user plane resource of the first session has been initiated may include the following two cases:

case 1: the access and mobility management function network element determines the status of the user plane resources of the first session as being active.

Illustratively, before the access and mobility management function network element receives the first message, the access and mobility management function network element receives a third message from the session management function network element (i.e., step 703), the third message including first status indication information and session management information, the first status indication information indicating that the status of the user plane resources of the first session is active, and the session management information including relevant parameters for activating the user plane resources of the first session. Illustratively, the third message is a first update session management context response message. And the access and mobility management function network element determines the state of the user plane resource of the first session as being activated according to the first state indication information in the third message. It should be noted that, before step 701, the access and session management function network element receives the third message but does not receive a fourth message (i.e., step 704), where the fourth message includes second status indication information, and the second status indication information is used to indicate that the status of the user plane resource of the first session is activated, so that the access and mobility management function network element determines that the status of the user plane resource of the first session is activated according to the first status indication information in the third message.

For example, the session management function network element sends the third message to the access and mobility management function network element (i.e. step 703), which may refer to step 208 in fig. 2 or step 304 in fig. 3 described above. The fourth message from the session management function network element to the access and mobility management function network element (i.e. step 704) may refer to step C in the embodiments shown in fig. 2 and 3 described above.

In addition, the access and mobility management function network element sends session management information to the access network device, so that the access network device establishes a DRB bearer corresponding to the first session according to the session management information.

Case 2: the access and mobility management function network element determines the status of the user plane resource of the first session as activated.

Illustratively, after the session management function network element sends the third message to the access and mobility management function network element, before the terminal device sends the first message to the access and mobility management function network element (i.e. before step 701), the session management function network element sends a fourth message to the access and mobility management function network element (i.e. step 704), where the fourth message includes second status indication information, and the second status indication information is used to indicate that the status of the user plane resource of the first session is activated. For example, the fourth message is an update session management context response message. That is, before step 701, the access and mobility management function network element further receives the third message and the fourth message, and the access and mobility management function network element determines that the state of the user plane resource of the first session is activated according to the second state indication information in the fourth message.

For example, the session management function network element sends the third message to the access and mobility management function network element, which may refer to step 208 in fig. 2 or step 304 in fig. 3 described above. The fourth message from the session management function network element to the access and mobility management function network element may refer to step C in the embodiments shown in fig. 2 and fig. 3.

Illustratively, when the second message indicates the failure of activation of the user plane resources of the first session, the second message is a service acceptance message, the information element for indicating the PDU session activation result indicates the failure of activation of the user plane resources of the first session, and the information element for indicating the error reason of the PDU session activation result indicates the reason of the failure of activation of the user plane resources of the first session.

Illustratively, when the second message indicates that the activation of the user plane resource of the first session is successful, the second message is a service acceptance message, and the information element for indicating the PDU session activation result indicates that the activation of the user plane resource of the first session is successful.

In some embodiments, when the access and mobility management function network element determines that the state of the user plane resources of the first session is active, the reason for the failure of the activation of the user plane resources of the first session is that the user plane resources of the first session are active.

In some embodiments, when the access and mobility management function network element determines that the state of the user plane resource of the first session is activated, the reason for the failure of the activation of the user plane resource of the first session is that the user plane resource of the first session is activated.

In some embodiments, when the access and mobility management function network element determines that the state of the user plane resource of the first session is activated or is being activated, the reason for the failure of the activation of the user plane resource of the first session is that the session management function network element has initiated the activation of the user plane resource of the first session.

By adopting the method, under the condition that the process of activating the user plane resource of the first session is initiated, the access and mobility management function network element receives a service request message for requesting to activate the user plane resource of the first session, and the access and mobility management function network element sends a service acceptance message to the terminal equipment, wherein the service acceptance message indicates the successful activation of the user plane resource of the first session or the failed activation of the user plane resource of the first session. Therefore, when the terminal device and the session management function network element initiate the activation of the user plane resource to the same PDU session and conflict occurs, the activated user plane resource can be prevented from being deactivated or the PDU session can be prevented from being released, and the service experience of the user can be improved.

Based on the above problems in scenario 1 (as shown in fig. 2) and scenario 2 (as shown in fig. 3), an embodiment of the present application provides a communication method, where when an access network device receives first session management information including relevant parameters for activating a user plane resource of a first session, if the access network device determines that a DRB bearer of the first session is established or reconstructs the DRB bearer of the first session according to the first session management information, the access network device sends a second message to an access and mobility management function network element, where the second message indicates that activation of the user plane resource of the first session is successful, so as to solve a problem that an activated user plane resource is deactivated or a PDU session is released due to a collision between a terminal device and the session management function network element for activation of the user plane resource initiated by the same PDU session, as shown in fig. 8, the method includes:

step 801: and the access and mobility management function network element sends a first message to the access network equipment, wherein the first message is used for activating the user plane resource of the first session.

Exemplarily, the first message is an N2 request message, the first message includes first session management information, and the first session management information includes a relevant parameter for activating a user plane resource of the first session.

In addition, the first message may further include a service acceptance message, and the access network device sends the service acceptance message to the terminal device.

For example, the session management function network element sends an update session management context response message to the access and mobility management function network element, where the update session management context response message includes the first state indication information and the first session management information, and the access and mobility management function network element sends the first session management information and the service acceptance message to the access network device. Wherein the first status indication information may indicate that the status of the user plane resource of the first session is active, and the service accept message includes an information element for indicating the PDU session activation result, and the information element for indicating the PDU session activation result indicates that the activation of the user plane resource of the first session is successful. Specifically, reference may be made to steps 218 to 219 in scenario 1 (shown in fig. 2) described above, or steps 313 and 314 in scenario 2 (shown in fig. 3) described above.

Step 802: and when the user plane resources of the first session are activated, the access network equipment sends a second message to the access and mobility management function network element, wherein the second message indicates that the user plane resources of the first session are successfully activated.

Illustratively, the second message is an N2 request acknowledgement message. The second message includes third session management information, and the third session management information includes a list of successful activation of the user plane resources of the PDU session (including a PDU session ID, etc.). At this time, the list of successful activation of the user plane resources of the PDU session indicates that the activation of the user plane resources of the first session is successful.

For example, the access network device determining that the user plane resource of the first session is activated may adopt, but is not limited to, the following two schemes:

scheme a: the access network device also receives a third message (step 803) before receiving the first message, where the third message is used to activate the user plane resources of the first session. Illustratively, the third message is an N2 request message, and the third message includes second session management information including relevant parameters for activating user plane resources of the first session.

For example, the session management function network element sends a session management context update response message to the access and mobility management function network element, where the session management context update response message includes the second session management information, and the access and mobility management function network element sends the second session management information to the access network device. Specifically, reference may be made to step 208 and step 209 in scenario 1 (shown in fig. 2) described above, or step 304 and step 305 in scenario 2 (shown in fig. 3) described above.

It should be noted that the third message may be triggered by the session management function network element initiating activation of the user plane resource of the first session, and the first message may be triggered by the terminal device initiating a request to activate the user plane resource of the first session. The second session management information and the first session management information may be the same or different.

Further, after receiving the third message, the access network device may send a first RRC connection reconfiguration message to the terminal device according to the third message (i.e., step 804), where the first RRC connection reconfiguration message is used to establish a DRB bearer of the first session. Exemplarily, the access network device determines the first DRB configuration information according to the second session management information in the third message, and the first RRC connection reconfiguration message includes the first DRB configuration information. The terminal device sends a first RRC connection reconfiguration complete message to the access network device (i.e., step 805), where the first RRC connection reconfiguration complete message is used to indicate that the DRB bearer of the first session is successfully established. Specifically, reference may be made to step 210A (or step 210B) and step 211 in fig. 2, or step 306 and step 307 in fig. 3.

Therefore, after the access network device receives the first message, the access network device may determine that the user plane resource of the first session is activated according to the first RRC connection reconfiguration complete message.

Scheme B: after the access network device receives the first RRC connection reconfiguration complete message (i.e., step 805) and the first message (i.e., step 801), the access network device may also release the DRB bearer of the first session and reconstruct the DRB bearer of the first session.

Illustratively, the access network device sends a second RRC connection reconfiguration message to the terminal device, where the second RRC connection reconfiguration message is used to release the DRB bearer of the first session, and the access network device receives a second RRC connection reconfiguration complete message from the terminal device, where the second RRC connection reconfiguration complete message is used to indicate that the DRB bearer of the first session is successfully released. And the access network equipment sends a third RRC connection reconfiguration message to the terminal equipment, wherein the third RRC connection reconfiguration message is used for establishing the DRB bearer of the first session. The third RRC connection reconfiguration message includes second DRB configuration information, and the second DRB configuration information is determined according to the first session management information in step 801. And the access network equipment receives a third RRC connection reconfiguration completion message from the terminal equipment, wherein the third RRC connection reconfiguration completion message is used for indicating that the DRB bearer of the first session is successfully established.

Through the above process, the access network device first releases the DRB bearer of the first session, and then reconstructs the DRB bearer of the first session, thereby ensuring the validity of the DRB bearer of the first session, and after the access network device completes reconstructing the DRB bearer of the first session, the access network device determines that the user plane resource of the first session is activated.

By adopting the method, when the user plane resource of the first session is activated, the access network equipment can send a second message to the access and mobility management function network element, wherein the second message indicates that the user plane resource of the first session is successfully activated. Therefore, when the terminal device and the session management function network element conflict with each other in initiating the activation of the user plane resources to the same PDU session, the activated user plane resources can be prevented from being deactivated or the PDU session can be prevented from being released, and the user service experience can be improved.

The embodiments shown in fig. 5 to 8 are described below with reference to specific embodiments.

Example 1: the UE has registered with the 5G network and the UE is in an idle state. There is currently a context for one active PDU session. For example, the identification of the PDU Session is PDU Session ID =5. A scenario and a collision processing procedure of a PDU Session, where an identifier of the PDU Session is PDU Session ID =5, are described below, where a user plane resource activation procedure initiated by a network side device collides with a user plane resource activation procedure initiated by a UE for the PDU Session, as shown in fig. 9.

It can be understood that the specific implementation manner of the embodiment shown in fig. 6 may be as an example of the embodiment shown in fig. 9, where the session management function network element in fig. 6 may be an SMF in fig. 9, the access and mobility management function network element in fig. 6 may be an AMF in fig. 9, and the terminal device in fig. 6 may be a UE in fig. 9.

Steps 901 to 908 may refer to steps 201 to 208 in scenario 1 (shown in fig. 2) described above.

Step 909: the AMF sends an N2 request message to the RAN. The N2 request message includes, for example, service acceptance information and session management information in step 908.

Exemplarily, the AMF determines that the service request message does not request to activate the user plane resource of the PDU session with PDU session ID =5, and receives the update session management context response message, and the AMF determines the state of the user plane resource of the PDU session with PDU session ID =5 as being activated according to the user plane context state information in the update session management context response message. At this time, the service accept message includes a new information element indicating the identity of the session in which the user plane resource is activated, and the identity of the session in which the user plane resource is activated includes PDU session ID =5.

Wherein the service acceptance information is used for responding to the service request information in step 905.

Steps 910A (or 910B) to 914 may refer to steps 210A (or 210B) to 214 in fig. 2.

Step 915: and the 5GMM layer in the UE determines that the radio resource establishment request message is cached, and the 5GMM layer in the UE determines that the PDU Session ID (e.g. PDU Session ID = 5) included in the radio resource establishment request message is the same as the identifier (e.g. PDU Session ID = 5) of the Session in which the service acceptance information includes the user plane resource is activated, so that the UE cancels the user resource activation flow of the PDU Session with the PDU Session ID =5.

It should be noted that after step 911, the signaling interaction flow between the network side devices is shown in steps a to C, and the specific content thereof may refer to the related description in the scenario 1 (as shown in fig. 2), and repeated parts are not repeated. It can be understood that the signaling interaction flow between the network side devices shown in steps a to C is independent from the signaling interaction flow inside the UE.

By adopting the method, when the UE is in an idle state, the 5GMM layer in the UE determines that the radio resource establishment request message is cached, and the 5GMM layer in the UE determines that the PDU Session ID included in the radio resource establishment request message is the same as the PDU Session ID included in the identification of the Session in which the user plane resource is activated in the service acceptance information, the UE cancels the user resource activation flow of the PDU Session with the PDU Session ID =5, thereby avoiding the problem that the user plane resource activation of the same PDU Session initiated by the terminal equipment and the Session management function network element conflicts, avoiding the deactivation of the user plane resource which is being activated or the release of the PDU Session, improving the user service experience, and reducing the signaling interaction between the terminal equipment and the network side.

Example 2: the UE has registered with the 5G network and the UE is in an idle state. There is currently a context for one PDU session that is active, but the user plane resources for that PDU session are not active. For example, the identification of the PDU Session is PDU Session ID =5. The following describes a scenario and a collision processing procedure when a PDU Session identifier is PDU Session ID =5, where a user plane resource activation procedure initiated by a network side device and a user plane resource activation procedure initiated by a UE collide with each other for the PDU Session, as shown in fig. 10.

It can be understood that the specific implementation manner of the embodiment shown in fig. 7 may be as an example of the embodiment shown in fig. 10, where the session management function network element in fig. 7 may be an SMF in fig. 10, the access and mobility management function network element in fig. 7 may be an AMF in fig. 10, and the terminal device in fig. 7 may be a UE in fig. 10.

Steps 1001 to step 1016 can refer to the above-mentioned steps 201 to 216 in scenario 1 (as shown in fig. 2) and are not repeated.

Step 1017: the AMF determines the status of the user plane resources of the PDU session =5.

Specifically, the AMF may determine the state of the user plane resource of the PDU session =5 in the following manner.

Mode 1: if the AMF does not receive step C, that is, step C is after step 1017, the AMF may determine the status of the user plane resource of the PDU session with PDU session ID =5 as being active according to the user plane context status information in the update session management context response message in step 1008.

Mode 2: the AMF has received step C, i.e. step C precedes step 1017, then the AMF may determine the status of the user plane resource of the PDU session with PDU session ID =5 as activated according to the user plane context status information in the update session management context response message in step C.

Step 1018: the AMF sends an N2 request message to the RAN. The N2 request message includes service acceptance information.

For the above mode 1, the amf determines service acceptance information, where the service acceptance information includes a PDU session activation result indicating that activation of user plane resources of a PDU session with PDU session ID =5 is successful, or the service acceptance information includes a PDU session activation result indicating that activation of user plane resources of a PDU session with PDU session ID =5 is failed and a PDU session activation result error cause indicating that user plane resources of a PDU session with PDU session ID =5 are being activated.

For the above mode 2, the amf determines service acceptance information, where the service acceptance information includes a PDU session activation result indicating that the user plane resource activation of the PDU session with PDU session ID =5 is successful, or the service acceptance information includes a PDU session activation result indicating that the user plane resource activation of the PDU session with PDU session ID =5 is failed and a PDU session activation result error cause indicating that the user plane resource of the PDU session with PDU session ID =5 is activated.

Step 1019: the RAN sends service acceptance information to the UE.

In some embodiments, if the service acceptance information includes a PDU session activation result and a PDU session activation result error cause, the UE queries a state of a user plane resource of a PDU session with PDU session ID =5 according to the PDU session activation result error cause, and if the PDU session user plane resource of PDU session ID =5 is already activated, the UE considers that the user plane resource of the PDU session with PDU session ID =5 is successfully activated; otherwise, the UE releases the PDU session with PDU session ID =5, and after the release is completed, the UE may reactivate the PDU session with PDU session ID =5 and request to activate the user plane resource of the PDU session with PDU session ID =5.

In some embodiments, the service acceptance information includes a PDU session activation result indicating that the user plane resource activation of the PDU session of PDU session ID =5 is successful. And the UE considers that the activation of the user plane resources of the PDU session with the PDU session ID =5 is successful, and does not perform the inquiry of the state of the user plane resources of the PDU session with the PDU session ID =5.

By adopting the method, aiming at the PDU session with the PDU session ID =5, when the user plane resource activation flow initiated by the network side equipment conflicts with the user plane resource activation flow initiated by the UE, the AMF determines the state of the user plane resource of the PDU session with the PDU session =5 and sends a service acceptance message to the UE, so that the activated user plane resource can be prevented from being deactivated or the PDU session can be released, and the user service experience is improved.

In addition, the method can also be applied to a scene that the user plane resource activation process initiated by the same PDU session network conflicts with the user plane resource activation process initiated by the UE when the UE is in the connected state.

Example 3: the UE has registered with the 5G network and the UE is in a connected (connected) state. There is currently a context for one PDU session that is active, but the user plane resources for that PDU session are not active. For example, the identification of the PDU Session is PDU Session ID =5. The following describes a scenario and a collision processing procedure when a PDU Session identifier is PDU Session ID =5, where a network-initiated user plane resource activation procedure and a UE-initiated user plane resource activation procedure collide with each other for the PDU Session, as shown in fig. 11.

It can be understood that the specific implementation manner of the embodiment shown in fig. 8 may be as an example of the embodiment shown in fig. 11, where the access network device in fig. 8 may be a RAN in fig. 11, the access and mobility management function network element in fig. 8 may be an AMF in fig. 11, and the terminal device in fig. 7 may be a UE in fig. 10.

Steps 1101 to 1114 may refer to the repetition of steps 301 to 314 in scenario 2 (as shown in fig. 3) described above, and are not repeated here.

Step 1115: the RAN determines from the Session management information in the N2 request message in step 1114 that user plane resources need to be activated for the PDU Session of PDU Session ID =5, and the RAN determines that the user plane resources of the PDU Session of PDU Session ID =5 are activated (e.g., the RAN may determine from step 1111), then the RAN performs step 1116, or directly performs step 1120 skipping steps 1116 to 1119.

Step 1116: and the RAN sends an RRC connection reconfiguration message to the UE, wherein the RRC connection reconfiguration message is used for releasing the DRB bearer of the PDU Session with the PDU Session ID =5.

Step 1117: and the UE sends an RRC connection reconfiguration completion message to the RAN, wherein the RRC connection reconfiguration completion message is used for indicating that the DRB bearer of the PDU Session with the PDU Session ID =5 is successfully released.

Step 1118: the RAN sends an RRC connection reconfiguration message, wherein the RRC connection reconfiguration message is used for activating a DRB bearer of a PDU Session with PDU Session ID =5. The RRC connection reconfiguration message in step 1118 includes the DRB configuration information determined according to the session management information in step 1114.

Step 1119: the UE sends an RRC connection reconfiguration complete message to the RAN. The RRC connection reconfiguration complete message is used to indicate successful activation of the DRB bearer for the PDU Session with PDU Session ID =5.

Step 1120: the RAN sends an N2 request acknowledge message to the AMF.

The N2 request acknowledge message includes session management information including a list of successful user plane resource activations for the PDU session (including the PDU session ID, etc.). At this time, the list of successful activation of user plane resources of the PDU Session indicates successful activation of user plane resources of the PDU Session of PDU Session ID =5.

Step 1121: the AMF sends an update session management context request message to the SMF. The update session management context request message includes the session management information in step 1120.

Step 1122: the SMF sends an update session management context response message to the AMF to respond to the update session management context request message sent by the AMF.

And the SMF determines that the user plane resource of the PDU Session with the PDU Session ID =5 is activated according to the Session management information in the request message for updating the Session management context sent by the AMF.

By adopting the method, for the PDU session with PDU session ID =5, when the user plane resource activation flow initiated by the network side equipment conflicts with the user plane resource activation flow initiated by the UE, the RAN can firstly release the DRB bearer of the PDU session and then reactivate the DRB bearer of the PDU session. The RAN sends Session management information indicating that user plane resource activation of the PDU Session of PDU Session ID =5 is successful to the AMF. Or, by using the above method, for a PDU Session with PDU Session ID =5, when a user plane resource activation procedure initiated by a network side device conflicts with a user plane resource activation procedure initiated by a UE, the RAN may directly send Session management information indicating that the user plane resource activation of the PDU Session with PDU Session ID =5 is successful to the AMF.

In addition, the method can also be applied to a situation that the user plane resource activation process initiated by the same PDU session network conflicts with the user plane resource activation process initiated by the UE when the UE is in an idle state.

Example 4: the UE has registered with the 5G network and the UE is in an idle state. There is currently a context for one active PDU session, but the user plane resources for that PDU session are not active. For example, the identification of the PDU Session is PDU Session ID =5. The following describes a scenario and a collision processing procedure when a PDU Session identifier is PDU Session ID =5, where a user plane resource activation procedure initiated by a network side device and a user plane resource activation procedure initiated by a UE collide with each other for the PDU Session, as shown in fig. 12.

It can be understood that the specific implementation manner of the embodiment shown in fig. 5 may be as an example of the embodiment shown in fig. 12, where the session management function network element in fig. 5 may be an SMF in fig. 12, the access network device in fig. 5 may be a RAN in fig. 12, the access and mobility management function network element in fig. 5 may be an AMF in fig. 12, and the terminal device in fig. 5 may be a UE in fig. 10.

Steps 1201 to 1217 may refer to the above-mentioned repetition of steps 201 to 217 in scenario 1 (as shown in fig. 2) and are not repeated here.

Step 1218: the SMF determines the status of the user plane resources for the PDU session =5.

Specifically, the SMF may determine the status of the user plane resources of the PDU session =5 in the following manner, but is not limited thereto.

Mode 1: if the SMF does not receive step C, i.e. step C is after step 1217, the SMF may determine the status of the user plane resource of the PDU session with PDU session ID =5 as being active according to the user plane context status information in the update session management context response message in step 1208.

Mode 2: the SMF has received step C, i.e. step C precedes step 1217, then the SMF may determine the status of the user plane resource of the PDU session with PDU session ID =5 as activated according to the user plane context status information in the update session management context response message in step C.

Mode 3: if the SMF does not receive step C, that is, if step C is after step 1217, the SMF buffers the updated session management context request message in step 1217, and after receiving step C, the SMF may determine that the status of the user plane resource of the PDU session with PDU session ID =5 is activated according to the user plane context status information in the updated session management context response message in step C.

Step 1219: the SMF sends an update session management context response message to the AMF.

For the above mode 1, the update session management context response message indicates that the activation of the user plane resource of the PDU session with PDU session ID =5 is successful, the update session management context response message includes user plane context state information, the user plane context state information is used to indicate that the state of the user plane resource of the PDU session with PDU session ID =5 is active, and the update session management context response message does not include session management information.

Or, the update session management context response message indicates that the activation of the user plane resource of the PDU session with PDU session ID =5 fails, the update context response message includes user plane context state information and a first cause value, the user plane context state information indicates that the state of the user plane resource of the PDU session with PDU session ID =5 is active, and the first cause value indicates that the user plane resource of the PDU session with PDU session ID =5 is active.

For the above mode 2 or mode 3, the update session management context response message indicates that the activation of the user plane resources of the PDU session with PDU session ID =5 is successful, the update session management context response message includes user plane context state information, and the user plane context state information is used to indicate that the state of the user plane resources of the PDU session with PDU session ID =5 is activated. Or, the update session management context response message indicates that the activation of the user plane resource of the PDU session with PDU session ID =5 fails, the update context response message includes user plane context state information and a second cause value, the user plane context state information indicates that the state of the user plane resource of the PDU session with PDU session ID =5 is activated, and the second cause value indicates that the user plane resource of the PDU session with PDU session ID =5 is activated.

Step 1220: the AMF sends an N2 request message to the RAN. The N2 request message includes service acceptance information.

For the above mode 1, mode 2, or mode 3, if the update session management context response message indicates that the activation of the user plane resources of the PDU session with PDU session ID =5 is successful, the service acceptance information includes a PDU session activation result, and the PDU session activation result indicates that the activation of the user plane resources of the PDU session with PDU session ID =5 is successful.

For the above mode 1, the service accept message includes an information element for indicating the PDU session activation result, or the service accept message includes an information element for indicating the PDU session activation result and an information element for indicating the PDU session activation result error reason, the information element for indicating the PDU session activation result indicates that the user plane resource activation of the PDU session with PDU session ID =5 fails, and the information element for indicating the PDU session activation result error reason indicates that the user plane resource of the PDU session with PDU session ID =5 is being activated.

With regard to the above mode 2 or mode 3, the service acceptance message includes an information element for indicating the PDU session activation result, or the service acceptance message includes an information element for indicating the PDU session activation result and an information element for indicating the PDU session activation result error cause, the information element for indicating the PDU session activation result indicates that the user plane resource activation of the PDU session with PDU session ID =5 fails, and the information element for indicating the PDU session activation result error cause indicates that the user plane resource of the PDU session with PDU session ID =5 is activated.

Step 1221: the RAN sends service acceptance information to the UE.

In some embodiments, the service acceptance information comprises a PDU session activation result indicating successful user plane resource activation for a PDU session with PDU session ID =5. And the UE considers that the activation of the user plane resources of the PDU session with the PDU session ID =5 is successful, and does not perform the inquiry of the state of the user plane resources of the PDU session with the PDU session ID =5.

By adopting the method, aiming at the PDU session with PDU session ID =5, when the user plane resource activation flow initiated by the network side equipment conflicts with the user plane resource activation flow initiated by the UE, the SMF determines the state of the user plane resource of the PDU session with PDU session =5, the SMF sends a session management context updating response message to the AMF according to the state of the user plane resource of the PDU session with PDU session =5, and the AMF sends a service acceptance message to the UE, so that the activated user plane resource can be prevented from being deactivated or the PDU session is released, and the user service experience is improved.

In addition, the method can also be applied to a scene that the user plane resource activation process initiated by the same PDU session network conflicts with the user plane resource activation process initiated by the UE when the UE is in the connection state.

Fig. 13 shows a possible exemplary block diagram of an apparatus involved in an embodiment of the present application, the apparatus 1300 comprising: a transceiver module 1310 and a processing module 1320, the transceiver module 1310 may include a receiving unit and a transmitting unit. The processing module 1320 is used for controlling and managing the operations of the apparatus 1300. The transceiver module 1310 is used to support communication of the apparatus 1300 with other network entities. Optionally, the apparatus 1300 may further comprise a storage unit for storing program codes and data of the apparatus 1300.

Alternatively, the modules in the apparatus 1300 may be implemented by software.

Alternatively, the processing module 1320 may be a processor or controller, such as a general purpose Central Processing Unit (CPU), a general purpose processor, a Digital Signal Processing (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, a transistor logic device, 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 of the embodiments of the application. The processor may also be a combination of computing functions, e.g., comprising one or more microprocessors, DSPs, and microprocessors, among others. The transceiver module 1310 may be a communication interface, a transceiver or a transceiver circuit, etc., wherein the communication interface is generally referred to as an interface, and in a specific implementation, the communication interface may include a plurality of interfaces, and the storage unit may be a memory.

When the apparatus 1300 is a terminal device or a chip in a terminal device, the processing module 1320 in the apparatus 1300 may enable the apparatus 1300 to execute the actions of the terminal device in the foregoing method examples, for example, may enable the apparatus 1300 to execute step 603 in fig. 6 and step 915 in fig. 9.

The transceiver module 1310 may support communication between the apparatus 1300 and the access and mobility management function network element, for example, the transceiver module 1310 may support the apparatus 1300 to perform step 503 in fig. 5, step 506, step 507, step 509, step 601 in fig. 6, step 602, step 605, step 701 in fig. 7, step 702, step 804 in fig. 8, step 805, step 904 in fig. 9, step 904, step 910A, step 910B, step 911, step 912, step 913, step 914, step 1004 in fig. 10, step 1005, step 1010A, step 1010B, step 1012, step 1013, step 1014, step 1015, step 1019, step 1106 in fig. 11, step 1107, step 1108, step 1109, step 1110, step 1117, step 1118, step 1119, step 1204 in fig. 12, step 1205, step 1210A, step 1210B, step 1211, step 1212, step 1214, step 1215, step 1221.

For example, the following may be used:

in one implementation, the apparatus 1300 includes:

the transceiver module 1310 receives a paging message from an access and mobility management function network element; the receiving and sending unit is configured to send a first service request message to the access and mobility management function network element in response to the paging message; after sending the first service request message to the access and mobility management function network element, the processing module 1320 is configured to start a procedure of requesting to activate a user plane resource of a first session; the transceiver module 1310 is configured to receive a first service acceptance message from the access and mobility management function network element, where the first service acceptance message includes an identifier of a session in which a session management function network element activates a user plane resource; the processing module 1320 is configured to cancel the flow of requesting to activate the user plane resource of the first session when the identifier of the session in which the session management function network element activates the user plane resource includes the identifier of the first session.

It should be understood that the apparatus 1300 according to the embodiment of the present application may correspond to the terminal device in the foregoing method embodiment, and operations and/or functions of the modules in the apparatus 1300 are respectively for implementing corresponding steps of the method of the terminal device in the foregoing method embodiment, so that beneficial effects in the foregoing method embodiment may also be implemented, and for brevity, no repeated description is provided herein.

When the apparatus 1300 is an access and mobility management function network element or a chip in the access and mobility management function network element, the processing module 1320 in the apparatus 1300 may enable the apparatus 1300 to perform the actions of the access and mobility management function network element in the above method examples, for example, may enable the apparatus 1300 to perform step 1017 in fig. 10.

The transceiving module 1310 may support communication between the apparatus 1300 and the terminal device or the session management function network element, for example, the transceiving module 1310 may support the apparatus 1300 to perform step 501, step 502, step 504, step 505, step 509 in fig. 6, step 602, step 604, step 605, step 701 in fig. 7, step 702, step 703, step 704, step 801 in fig. 8, step 802, step 803, step 901, step 902, step 903, step 906, step 907, step 908, step 909, step a, step B and step C, step 1001 in fig. 10, step 1002, step 1003, step 1006, step 1007, step 1008, step 1009, step 1016, step 1018, step a, step B and step C, step 1101 in fig. 11, step 1102, step 1103, step 1104, step 1105, step 1111, step 1112, step 1113, step 1114, step 1120, step 1121, step 1122, step a, step B and step C, step 1201 in fig. 12, step 1202, step 1203, step 1206, step 1207, step 1208, step 1209, step 1216, step 1217, step 1219, step 1220, step a, step B and step C.

For example, the following may be used:

in one implementation, the apparatus 1300 includes:

the processing module 1320 invokes the transceiving module 1310 to perform: sending a paging message to a terminal device, and receiving a first service request message from the terminal device, wherein the first service request message is used for responding to the paging message; receiving a first message from a session management function network element, wherein the first message is used for requesting to activate a user plane resource of the first session; and sending a first service acceptance message to the terminal equipment, wherein the first service acceptance message comprises an identifier of a session of the user plane resource activated by the session management function network element, and the identifier of the session of the user plane resource activated by the session management function network element comprises the identifier of the first session.

It should be understood that the apparatus 1300 according to the embodiment of the present application may correspond to the method for accessing and managing a functional network element in the foregoing method embodiment, and operations and/or functions of each module in the apparatus 1300 are respectively for implementing corresponding steps of the method for accessing and managing a functional network element in the foregoing method embodiment, so that beneficial effects in the foregoing method embodiment may also be implemented, and for the sake of brevity, details are not described here.

When the apparatus 1300 is a session management function network element or a chip in the session management function network element, the processing module 1320 in the apparatus 1300 may enable the apparatus 1300 to perform the actions of the session management function network element in the foregoing method examples, for example, may enable the apparatus 1300 to perform step 1218 in fig. 12.

The transceiver module 1310 may support communication between the apparatus 1300 and the access and mobility management function network element, for example, the transceiver module 1310 may support the apparatus 1300 to perform step 501, step 502, step 504, step 508 in fig. 6, step 703, step 704 in fig. 7, step 901, step 902, step 907, step 908, step B, step C in fig. 9, step 1001 in fig. 10, step 1002, step 1007, step 1008, step B, step C, step 1101 in fig. 11, step 1102, step 1103, step 1104, step 1112, step 1113, step 1121, step 1122, step B, step C, step 1201 in fig. 12, step 1202, step 1207, step 1208, step 1217, step 1219, step B, step C.

For example, the following may be used:

in one implementation, the apparatus 1300 includes:

the transceiver module 1310 is configured to receive a first message from an access and mobility management function network element, where the first message is used for a terminal device to request activation of a user plane resource of the first session; the processing module 1320 is configured to determine that the session management function network element has initiated and activated the user plane resource of the first session; the transceiver module 1310 is configured to send a second message to the access and mobility management function network element, where the second message is used to indicate that the activation of the user plane resource of the first session is successful.

It should be understood that the apparatus 1300 according to the embodiment of the present application may correspond to the method of the session management function network element in the foregoing method embodiment, and the operations and/or functions of the modules in the apparatus 1300 are respectively for implementing corresponding steps of the method of the session management function network element in the foregoing method embodiment, so that the beneficial effects in the foregoing method embodiment may also be implemented, and for brevity, no repeated description is provided here.

When the processing module 1320 in the present embodiment is a processor and the transceiver module 1310 is a transceiver, the apparatus 1300 according to the present embodiment may be the apparatus 1400 shown in fig. 14.

Fig. 14 shows a schematic block diagram of a communication device 1400 according to an embodiment of the application. As shown in fig. 14, the apparatus 1400 comprises: a processor 1401.

When the apparatus 1300 is a terminal device or a chip in a terminal device, in a possible implementation, when the processor 1401 is configured to invoke an interface to perform the following actions:

receiving a paging message from an access and mobility management function network element, and sending a first service request message to the access and mobility management function network element in response to the paging message; after sending the first service request message to the access and mobility management function network element, starting a procedure of requesting to activate a user plane resource of a first session, and receiving a first service acceptance message from the access and mobility management function network element, where the first service acceptance message includes an identifier of a session in which the session management function network element activates the user plane resource, and when the identifier of the session in which the session management function network element activates the user plane resource includes the identifier of the first session, canceling the procedure of requesting to activate the user plane resource of the first session.

It should be understood that the apparatus 1400 may also be used to perform other steps and/or operations on the terminal device side in the foregoing embodiments, and for brevity, the detailed description is omitted here.

When the apparatus 1300 is an access and mobility management function network element or a chip in an access and mobility management function network element, in a possible implementation, when the processor 1401 is configured to invoke an interface to perform the following actions:

receiving a first service request message from the terminal equipment, wherein the first service request message is used for responding to the paging message; receiving a first message from a session management function network element, wherein the first message is used for requesting to activate a user plane resource of the first session; and sending a first service acceptance message to the terminal device, where the first service acceptance message includes an identifier of a session in which the session management function network element activates the user plane resource, and the identifier of the session in which the session management function network element activates the user plane resource includes the identifier of the first session.

It should be understood that the apparatus 1400 may also be configured to perform other steps and/or operations on the access and mobility management function network element side in the foregoing embodiments, and details are not described herein for brevity.

When the apparatus 1300 is a session management function network element or a chip in a session management function network element, in a possible implementation, when the processor 1401 is configured to invoke an interface to perform the following actions:

receiving a first message from an access and mobility management function network element, wherein the first message is used for a terminal device to request to activate a user plane resource of the first session; determining that the session management function network element has initiated activation of the user plane resource of the first session; and sending a second message to the access and mobility management function network element, wherein the second message is used for indicating that the user plane resource of the first session is successfully activated.

It should be understood that the apparatus 1400 may also be configured to perform other steps and/or operations on the network element side of the session management function in the foregoing embodiments, and details are not described herein for brevity.

It should be understood that the processor 1401 may invoke an interface to perform the transceiving action, wherein the invoked interface may be a logical interface or a physical interface, which is not limited thereto. Alternatively, the physical interface may be implemented by a transceiver. Optionally, the apparatus 1400 further comprises a transceiver 1403.

Optionally, the apparatus 1400 further comprises a memory 1402, wherein the memory 1402 may store the program codes of the above method embodiments for the processor 1401 to call.

Specifically, if the apparatus 1400 comprises the processor 1401, the memory 1402 and the transceiver 1403, the processor 1401, the memory 1402 and the transceiver 1403 communicate with each other via the internal connection path to transmit control and/or data signals. In one possible design, the processor 1401, the memory 1402, and the transceiver 1403 may be implemented by chips, and the processor 1401, the memory 1402, and the transceiver 1403 may be implemented in the same chip, or may be implemented in different chips, or any two functions may be combined in one chip. The memory 1402 may store program code, which the processor 1401 calls upon to implement the corresponding functions of the apparatus 1400.

The method disclosed in the embodiments of the present application may be applied to a processor, or may be implemented by a processor. The processor may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method embodiments may be performed by integrated logic circuits of hardware in a processor or instructions in the form of software. The processor may be a general-purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, a system on chip (SoC), a Central Processing Unit (CPU), a Network Processor (NP), a Digital Signal Processor (DSP), a Microcontroller (MCU), a programmable logic controller (PLD), or other integrated chip. The various methods, steps, and logic blocks disclosed in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in a memory, and a processor reads information in the memory and completes the steps of the method in combination with hardware of the processor.

It will be appreciated that the memory in the embodiments of the subject application can be either volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory. The non-volatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an electrically Erasable EPROM (EEPROM), or a flash memory. Volatile memory can be Random Access Memory (RAM), which acts as external cache memory. By way of example, and not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), dynamic random access memory (dynamic RAM, DRAM), synchronous Dynamic Random Access Memory (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), SLDRAM (synchronous DRAM), and direct rambus RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

It should be understood that, in the embodiments of the present application, the numbers "first" and "second" 8230are used only for distinguishing different objects, such as for distinguishing different parameter information or messages, and do not limit the scope of the embodiments of the present application, and the embodiments of the present application are not limited thereto.

It should also be understood that, in the various embodiments of the present application, the size of the serial number of each process described above does not mean the execution sequence, and the execution sequence of each process should be determined by the function and the inherent logic of each process. The various numbers or serial numbers involved in the above processes are merely used for convenience of description and should not be construed as limiting the implementation processes of the embodiments of the present application in any way.

It should also be understood that the term "and/or" herein is merely one type of association relationship that describes an associated object, meaning that three relationships may exist, e.g., a and/or B, may represent: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

Items appearing in this application as similar to "include one or more of the following: the meaning of a, B, and C "typically means that the item may be any of the following, unless otherwise specified: a; b; c; a and B; a and C; b and C; a, B and C; a and A; a, A and A; a, A and B; a, A and C, A, B and B; a, C and C; b and B, B, B and C, C and C; c, C and C, and other combinations of A, B and C. The above description is made by taking 3 elements of a, B and C as examples of optional items of the item, and when the expression "item" includes at least one of the following: a, B, \8230;, and X ", i.e., with more elements in the expression, then the items to which the item can be applied can also be obtained according to the rules described above.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. 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 application.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, 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 position, or may be distributed on multiple 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 application 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 functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a removable hard disk, a read-only memory ROM, a random access memory RAM, a magnetic disk, or an optical disk.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall 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

1. A method of communication, the method comprising:

a session management function network element receives a first message from an access and mobility management function network element, wherein the first message is used for requesting the session management function network element to activate a user plane resource of a first session;

and under the condition that the process of activating the user plane resources of the first session is initiated, the session management function network element sends a second message to the access and mobility management function network element, wherein the second message is used for indicating that the user plane resources of the first session are successfully activated.

2. The method of claim 1, wherein the method further comprises:

and the session management function network element determines that the process of activating the user plane resource of the first session is initiated.

3. The method of claim 2, wherein the determining, by the session management function network element, that the process of activating the user plane resources for the first session has been initiated comprises:

and the session management function network element determines that the state of the user plane resource of the first session is active.

4. The method of claim 3, wherein the session management function network element determining that the state of the user plane resources of the first session is active comprises:

the session management function network element determines that the state of the user plane resource of the first session is being activated according to the first user plane context state information corresponding to the first session; wherein the first user plane context state information indicates that a state of a user plane resource of the first session is active.

5. The method of claim 4, further comprising:

before the session management function network element receives the first message from the access and mobility management function network element, the session management function network element sends a third message to the access and mobility management function network element; the third message comprises first state indication information and first session management information, wherein the first state indication information is used for indicating that the state of the user plane resource of the first session is being activated; the first session management information comprises relevant parameters for activating user plane resources of the first session.

6. The method of any of claims 1-5, wherein the second message includes second status indication information indicating that the status of the user plane resources of the first session is active and does not include parameters related to activating the user plane resources of the first session.

7. The method of claim 2, wherein the determining, by the session management function network element, that the process of activating the user plane resources for the first session has been initiated comprises:

and the session management function network element determines that the state of the user plane resource of the first session is activated.

8. The method of claim 7, wherein the method further comprises:

before the session management function network element receives the first message from the access and mobility management function network element, the session management function network element receives second session management information from an access network device, where the second session management information indicates that the user plane resource activation of the first session is successful;

the determining, by the session management function network element, that the state of the user plane resource of the first session is activated includes:

and the session management functional network element determines that the state of the user plane resource of the first session is activated according to the second session management information.

9. The method of claim 7 or 8, wherein the second message comprises third status indication information indicating that the status of the user plane resources of the first session is activated.

10. A method of communication, the method comprising:

the terminal equipment receives paging messages from an access and mobility management function network element;

in response to the paging message, the terminal device sending a first service request message to the access and mobility management function network element;

after the terminal equipment sends the first service request message to the access and mobility management function network element, the terminal equipment starts a process of requesting to activate user plane resources of a first session;

the terminal equipment receives a first service acceptance message from the access and mobility management function network element, wherein the first service acceptance message comprises an identifier of at least one session, and the at least one session is a session with activated user plane resources;

and when the identification of the at least one session comprises the identification of the first session, the terminal equipment cancels the flow of requesting to activate the user plane resource of the first session.

11. The method of claim 10, wherein the session in which the user plane resource is activated comprises a session in which the user plane resource is being activated.

12. The method according to claim 10 or 11, wherein the procedure of the terminal device to cancel the request for activating the user plane resource of the first session comprises:

and the terminal equipment does not send a second service request message to the access and mobility management function network element, wherein the second service request message is used for requesting to activate the user plane resource of the first session.

13. The method of any of claims 10-12, wherein the terminal device comprises a mobility management layer and a quality of service traffic control layer;

the process of the terminal equipment starting request for activating the user plane resource of the first session comprises the following steps:

the mobility management layer receives a radio resource establishment request message from the QoS traffic control layer, wherein the radio resource establishment request message is used for requesting to activate the user plane resource of the first session and comprises the identifier of the first session;

the mobility management layer buffers the radio resource establishment request message.

14. The method of claim 13, wherein the process of the terminal device canceling the request for activation of the user plane resource for the first session further comprises:

the mobility management layer clears the radio resource establishment request message.

15. The method of any of claims 10-14, wherein uplink data state information in the first service request message does not indicate an identification of the first session.

16. A method of communication, the method comprising:

the method comprises the steps that an access and mobility management function network element receives a first message from a session management function network element, wherein the first message comprises state indication information, and the state indication information is used for indicating that the state of a user plane resource of a first session is activated;

and the access and mobility management function network element sends a first service acceptance message to the terminal equipment, wherein the first service acceptance message comprises an identifier of the first session, and the identifier of the first session is used for indicating that the user plane resource of the first session is activated.

17. The method of claim 16, further comprising:

and the access and mobility management function network element generates the first service acceptance message comprising the identifier of the first session according to the state indication information.

18. The method of claim 16 or 17, further comprising:

the access and mobility management function network element sends a paging message to the terminal equipment;

and the access and mobility management function network element receives a first service request message from the terminal equipment, wherein the first service request message is used for responding to the paging message.

19. The method of claim 18, wherein the uplink data state information in the first service request message does not indicate an identification of the first session.

20. A method according to any of claims 16-19, wherein the first message comprises session management information, the session management information comprising parameters related to activating user plane resources for the first session;

the method further comprises the following steps:

and the access and mobility management function network element sends the session management information to access network equipment.

21. A communications apparatus comprising means for performing the method of any of claims 1-9.

22. A communications apparatus comprising means for performing the method of any of claims 10-15.

23. A communications apparatus, comprising means for performing the method of any of claims 16-20.

24. A communication device, comprising a processor and a memory; the memory is configured to store computer-executable instructions that, when executed by the apparatus, cause the apparatus to perform the method of any of claims 1 to 9.

25. A communication device, comprising a processor and a memory; the memory is for storing computer-executable instructions that, when executed by the apparatus, are executed by the processor to cause the communications apparatus to perform the method of any of claims 10 to 15.

26. A communication device, comprising a processor and a memory; the memory is for storing computer-executable instructions that, when executed by the apparatus, cause the apparatus to perform the method of any of claims 16 to 20.

27. A computer-readable storage medium, in which a computer program or instructions is stored which, when executed by a communication apparatus, carries out the method of any one of claims 1 to 20.