WO2019033945A1

WO2019033945A1 - Method and device for processing non-matching between ue and network state

Info

Publication number: WO2019033945A1
Application number: PCT/CN2018/098683
Authority: WO
Inventors: 王胡成
Original assignee: 电信科学技术研究院有限公司
Priority date: 2017-08-14
Filing date: 2018-08-03
Publication date: 2019-02-21

Abstract

Disclosed are a method and device for processing non-matching between a UE unit and a network state applicable to an access and mobility management (AMF) function. The method comprises: upon receiving a non-access stratum message transmitted by a UE unit or an N2 interface message transmitted by a radio access network (RAN) node, determining that the UE unit is in a connected state at a network side; and if it is determined that a change occurs in a RAN node serving the UE unit, notifying said RAN node that a context of the UE unit and an existing user plane connection are to be released. The invention solves technical problems in the prior art of inefficient use of an air interface resource and packet loss, thereby reducing paging overheads and packet loss.

Description

Processing method and device for UE and network state mismatch

This application claims the priority of the Chinese Patent Application filed on August 14, 2017, the Chinese Patent Office, the application number is 201710693914.4, and the invention is entitled "a processing method and device for UE and network status mismatch", and the requirements are in 2017. Priority of Chinese Patent Application filed on Sep. 20, the Chinese Patent Application No. PCT Application No. No. No. No. No. No. No. No. No. The entire contents of this application are incorporated herein by reference.

Technical field

The present invention relates to the field of communications technologies, and in particular, to a processing method and apparatus for UE and network status mismatch.

Background technique

At present, 3GPP (3rd Generation Partnership Project) has determined the architecture reference module of 5G (The Fifith Generation Mobile Network) network. For this architecture, 3GPP introduces a new RRC (Radio Resource Control) state, that is, RRC inactive (RRC inactive state). When the UE (User Equipment) is in this state, the RRC connection between the RAN (Radio Access Network) node and the UE has been released, but the connection of the Nx interface remains.

The RRC inactive state is required to be transparent to the core network, that is, the core network still considers that the UE is always in the connected state, so the RAN node receives the downlink signaling or data of the UE in this state, and the RAN node needs to page the UE, that is, RAN level Paging (RAN level paging).

In order to support RAN level Paging, the RAN node needs to support the RAN level (Paging Area Update), that is, the RAN node allocates a paging area for the UE in the RRC inactive state. When the UE moves out of the Paging area, the UE needs to initiate a Paging area update process, and the RAN node allocates a new Paging area to the UE at this time. If the RAN anchor node of the currently serving UE changes due to the movement of the UE, Context (Context) transmission needs to be performed between the RAN anchor nodes, and the N2 interface is updated to the core network (the N2 interface is an interface between the RAN and the AMF). )Connection.

In addition, in order to support the Paging area update of the RAN level, the AMF (Access and Mobility Management Function) needs to provide auxiliary information to the RAN anchor node, such as registration area (allowed area), allowed DRX (allowed non- Continuous reception), etc., where the registration area is in the registration area to ensure the allocation of the RAN level Paging area.

Moreover, in the AMF, the connection management state of the UE is divided into CM-IDLE (Idle State) and CM-CONNECTED (Connected State). When the interface connection between the RAN and the AMF is released, the AMF considers that the UE enters the CM-IDLE state, otherwise the AMF considers that the UE is always in the connected state.

Specifically, after the 5G RAN activates the RRC inactive state for the UE, the RAN anchor node receives the downlink data and pages the UE. If the UE moves out of the current RAN Paging area, the RAN enters a RAN that does not support the RRC inactive state. When the node is covered, the UE cannot maintain the RRC inactive state and cannot receive the RAN level Paging of the original RAN anchor node. In this way, the original RAN anchor node will not receive the Paging response of the UE, and will fail after repeating the RAN level Paging multiple times, which will increase the paging overhead, thereby causing waste of air interface resources and packet loss.

It can be seen that the prior art has technical problems of waste of air interface resources and packet loss.

Summary of the invention

The embodiments of the present invention provide a method and a device for processing a mismatch between a UE and a network, which are used to solve the technical problem of waste of air interface resources and packet loss in the prior art, and reduce paging overhead and packet loss.

In an aspect, an embodiment of the present invention provides a processing method for a user equipment (UE) and a network state mismatch, which is applied to an access and mobility management function (AMF), including: receiving non-access sent by the UE When the layer message or the message of the N2 interface sent by the radio access network (RAN) node is determined, the UE is determined to be in the connected state on the network side; the RAN node serving the UE is determined to be changed, and the original RAN node is notified to release the UE. The context and the existing user plane connection.

Optionally, the receiving the non-access stratum message sent by the UE includes: receiving an initial non-access stratum message sent by the UE in an idle state, where the idle state is that the UE controls from a radio resource (RRC) The connection management idle state entered by the non-access stratum after entering the RRC idle state in the inactive state.

Optionally, the receiving the initial non-access stratum message sent by the UE in an idle state, comprising: receiving a registration update request message sent by the UE in the idle state; or When the uplink data is sent in the idle state, the request message of the UE is received.

Optionally, the determining that the UE is in a connected state on the network side comprises: determining, according to the saved context of the UE, that the UE is in a connected state on a network side.

Optionally, the notifying the original RAN node to release the context and user plane connection of the UE includes: notifying the original RAN node to release the context of the UE; and deleting the user plane connection with the core network.

Optionally, the method further includes: notifying the original RAN node to release the context of the UE, so that the original RAN node stops paging at the RAN level.

Optionally, the determining that the RAN node serving the UE changes comprises: determining a RAN node that forwards the non-access stratum message or a RAN node that sends an N2 interface message, and the saved RAN in the UE context When the nodes are different, it is determined that the RAN node serving the UE changes.

Optionally, the determining that the RAN node serving the UE changes, notifying the original RAN node to release the context and the user plane connection of the UE, further comprising: requesting a session management function (SMF) to deactivate the protocol data unit session (PDU) The request is used to request the SMF to deactivate the user plane connection, so that the SMF deletes the user plane configuration of the PDU session.

Optionally, after the receiving the non-access stratum message sent by the UE or the message of the N2 interface sent by the RAN node of the radio access network, the method includes: determining that the UE enters a disallowed area or a forbidden area, and notifies the service center The request session management function SMF of the protocol data unit session (PDU session) to which the user plane connection belongs is that the UE is only reachable by the high priority service.

Optionally, if the service request message of the UE is received, the method further includes: requesting a session management function SMF to deactivate the PDU session according to a protocol data unit session (PDU session) specified in the service request message. And then activate the PDU session.

On the other hand, an embodiment of the present invention further provides a processing device for a user equipment UE and a network state mismatch, which is applied to an access and mobility management function (AMF), including: a first determining module, configured to receive Determining that the UE is in a connected state on the network side when the non-access stratum message sent by the UE or the message of the N2 interface sent by the radio access network (RAN) node is determined; the second determining module is configured to determine that the UE is serving The RAN node changes, notifying the original RAN node to release the context of the UE and the existing user plane connection.

Optionally, the apparatus further includes: a receiving module, configured to: receive an initial non-access stratum message sent by the UE in an idle state, where the idle state is that the UE is inactive from radio resource control (RRC) After the state enters the RRC idle state, the connection entered by the non-access stratum manages the idle state, and then the initial non-access stratum message is sent.

Optionally, the receiving module is configured to: receive a registration update request message sent by the UE in the idle state; or, when the UE sends uplink data in the idle state, receive the UE Request message.

Optionally, the first determining module is configured to: determine, according to the saved context of the UE, that the UE is in a connected state on a network side. Optionally, the second determining module is configured to:

Notifying the original RAN node to release the context of the UE; deleting the user plane connection with the core network.

Optionally, the second determining module is further configured to: notify the original RAN node to release the context of the UE, so that the original RAN node stops paging at the RAN level.

Optionally, the second determining module is configured to: determine a RAN node that forwards the non-access stratum message or a RAN node that sends an N2 interface message, and determine a service when the saved RAN node in the UE context is different. The RAN node of the UE changes.

Optionally, the second determining module is further configured to: request a session management function (SMF) to deactivate a protocol data unit session (PDU session), where the request is used to request the SMF to deactivate a user plane connection, so that The SMF deletes the user plane configuration of the PDU session.

Optionally, after the receiving the non-access stratum message sent by the UE or the message of the N2 interface sent by the radio access network RAN node, the apparatus further includes a third determining module, configured to: determine the UE Entering the disallowed area or the forbidden area, and notifying the request session management function (SMF) of the protocol data unit session (PDU session) to which the user plane connection belongs, the UE is only reachable by the high priority service.

Optionally, if receiving the service request message of the UE, the apparatus further includes: a requesting module, configured to request a session management function SMF according to a protocol data unit session (PDU session) specified in the service request message The PDU session is activated, and then the PDU session is activated.

In another aspect, an embodiment of the present invention provides a computer apparatus including a memory, a processor, and a computer program stored on the memory and operable on the processor, when the processor executes the computer program A step of implementing a processing method in which the UE and the network state do not match as described above.

In another aspect, an embodiment of the present invention provides a computer readable storage medium having stored thereon a computer program, the computer program being executed by a processor to implement the steps of the processing method of UE and network status mismatch as described above.

The above one or more technical solutions in the embodiments of the present invention have at least one or more of the following technical effects:

In the technical solution of the embodiment of the present invention, when receiving the non-access stratum message sent by the UE or the message of the N2 interface sent by the radio access network (RAN) node, determining that the UE is in the connected state on the network side Determining that the RAN node serving the UE changes, notifying the original RAN node to release the context of the UE and the existing user plane connection. That is, when it is determined that the network status of the RAN node of the UE and the currently serving UE does not match, the original RAN node is notified to release the context of the UE and the existing user plane connection, thereby solving the waste of air interface resources and packet loss. Technical issues reduce paging overhead and packet loss.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only the present invention. Some embodiments.

FIG. 1 is a flowchart of a method for processing a UE and a network state mismatch according to Embodiment 1 of the present invention;

FIG. 2 is a flowchart of a step of determining, in step S102, that a RAN node of a serving UE is changed in a processing method of UE and network state mismatch according to Embodiment 1 of the present invention;

FIG. 3 is a flowchart of a procedure for notifying an original RAN node to release a context and a user plane connection of the UE in step S102 in a method for processing a UE and a network state mismatch according to the first embodiment of the present invention;

FIG. 4 is a schematic diagram of a process of receiving an initial non-access stratum message in a first case in a method for processing a UE and a network state mismatch according to the first embodiment of the present invention;

FIG. 5 is a schematic diagram of a process of receiving an initial non-access stratum message in a second case in a method for processing a UE and a network state mismatch according to the first embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a processing apparatus for UE and network status mismatch according to Embodiment 2 of the present invention;

FIG. 7 is a schematic diagram of a processing apparatus for UE and network status mismatch according to an embodiment of the present invention.

Detailed ways

The technical solution in the embodiment of the present invention is to solve the above technical problem, and the general idea is as follows:

A processing method for user equipment (UE) and network state mismatch, applied to an access and mobility management function (AMF), comprising: receiving a non-access stratum message or a radio access network (RAN) sent by the UE When the message of the N2 interface sent by the node is determined, the UE is determined to be in the connected state on the network side; the RAN node serving the UE is determined to be changed, and the original RAN node is notified to release the context of the UE and the existing user plane connection.

The term "and/or" in this context is merely an association describing the associated object, indicating that there may be three relationships, for example, A and/or B, which may indicate that A exists separately, and both A and B exist, respectively. B these three situations. In addition, the character "/" in this document generally indicates that the contextual object is an "or" relationship unless otherwise specified.

For a better understanding of the above technical solutions, the technical solutions of the present invention will be described in detail below through the accompanying drawings and specific embodiments. It should be understood that the specific features of the embodiments and the embodiments of the present invention are the detailed description of the technical solutions of the present invention, and The technical features of the embodiments of the present invention and the embodiments may be combined with each other without conflict.

Embodiment 1

Referring to FIG. 1, a first embodiment of the present invention provides a processing method for a user equipment (UE) and a network state mismatch, which is applied to an access and mobility management function (AMF), including:

S101: When receiving the non-access stratum message sent by the UE or the message of the N2 interface sent by the radio access network (RAN) node, determining that the UE is in a connected state on the network side;

S102: Determine that the RAN node serving the UE changes, and notify the original RAN node to release the context of the UE and the existing user plane connection.

In the embodiment of the present invention, the specific implementation process of step S101 to step S102 is as follows:

In a specific implementation process, the AMF receives an access layer message sent by the UE, which may be a registration update message, a Service Request message, or the like. In the embodiment of the present invention, the step of: receiving the non-access stratum message sent by the UE, specifically: receiving an initial non-access stratum message sent by the UE in an idle state, where the idle state is the UE The connection management idle state entered by the non-access stratum after entering the RRC idle state from the radio resource control (RRC) inactive state. For example, when the 5G RAN activates the RRC inactive state for the UE, the RAN anchor node receives the downlink data and pages the UE. If the UE moves out of the current RAN paging area and enters a RAN node coverage area that does not support the RRC inactive state, the UE may not remain in the RRC inactive state, and the UE manages the connection state from the current connection. Switch to connection management idle state.

In the embodiment of the present invention, the initial non-access stratum message may specifically be the registration update message, the Service Request message, and the like. Therefore, in a specific implementation process, the step of receiving the initial non-access stratum message sent by the UE in an idle state may be in the following two situations, but is not limited to the following two cases.

First case

The first case is: receiving a registration update request message sent by the UE in the idle state; for example, when the UE leaves the paging area of the current RAN node and enters a RAN node coverage area that does not support the RRC inactive state. The UE directly sends a registration update request message to the AMF.

Second case

The second case is: when the UE sends uplink data in the idle state, receiving a request message of the UE. For example, when the UE leaves the paging area of the current RAN node and enters the RAN node coverage area that does not support RRC inactive, when the UE has uplink data to be transmitted, the UE needs to further determine whether the current mobile moves out of the current RAN. The registration area assigned by the node. Further, if not, the service request process is initiated. That is, when the UE sends uplink data in the idle state, receiving a request message of the UE, the request message may be a service request message.

In a specific implementation process, when the UE enters an RRC idle state, but the UE does not move out of the current registration area, the UE only initiates a RAN level location update process, and does not initiate any non-access stratum process. When the RAN node that receives the RAN level location update request of the UE determines that the RRC inactive state cannot be activated for the UE, it initiates an N2 release procedure to the AMF of the core network.

In a specific implementation process, the original RAN node receives the downlink signaling or data of the UE in this state, because the core network considers that the UE is always in the connected state, that is, when determining that the UE is in the connected state on the network side, the original RAN node receives the downlink signaling or data of the UE in this state. The original RAN node needs to page the UE. In a specific implementation process, when it is determined that the UE is in a connected state on the network side, it is further determined whether a RAN node serving the UE changes. Upon determining that the RAN node serving the UE changes, the original RAN node is notified to release the context of the UE and the existing user plane connection, wherein the context of the UE includes the mobility context and the context of the session connection. In this way, the original RAN node will no longer page the UE, thereby reducing paging overhead.

In the embodiment of the present invention, the step of: determining that the RAN node serving the UE is changed, including: determining that the RAN node serving the UE changes, including: determining a RAN node that forwards the non-access stratum message or sending the N2 The RAN node of the interface message determines that the RAN node serving the UE changes when it is different from the saved RAN node in the UE context.

In the embodiment of the present invention, in the scheme of determining that the UE is in a connected state on the network side by receiving the non-access stratum message sent by the UE, and determining that the RAN node serving the UE changes, Referring to FIG. 2, in step S102, it is determined that the RAN node serving the UE changes, including:

S201: Determine, according to the saved context of the UE, that the RAN node that is saved in the context and serves the UE is an original RAN node;

S202. Determine, according to the original RAN node and the RAN node that forwards the initial non-access stratum message that currently serves the UE, that the RAN node serving the UE changes.

The specific implementation process of step S201 to step S202, that is, determining that the RAN node that forwards the non-access stratum message is different from the RAN node in the saved UE context, determining that the RAN node serving the UE occurs change.

In the embodiment of the present invention, when receiving the message of the N2 interface sent by the RAN node, determining that the UE is in a connected state on the network side, and determining that the RAN node serving the UE changes, the step of: determining a service The specific implementation process of changing the RAN node of the UE is to determine that the RAN node that sends the N2 interface message is different from the RAN node in the saved UE context, and determines that the RAN node serving the UE changes.

In a specific implementation process, after the AMF receives the release message of the N2 interface that is currently sent by the RAN node of the UE, it is determined that the current UE is in the connected state on the network side, and is recorded in the UE context saved by itself. The RAN node serving the UE is different from the RAN node currently serving the UE, and the AMF requests the original RAN node, that is, the RAN node of the serving UE described in the UE context, releasing the context of the UE and the possible user plane. connection.

Of course, for those skilled in the art, it is also possible to determine whether the RAN node serving the UE changes by designing different schemes according to actual needs, and details are not described herein.

In the embodiment of the present invention, the step of determining that the UE is in a connected state on the network side, the specific implementation process may be: determining that the UE is in a connected state on the network side according to the saved context of the UE.

In the embodiment of the present invention, referring to FIG. 3, in step S102, the original RAN node is notified to release the context and user plane connection of the UE, including:

S301: notify the original RAN node to release the context of the UE.

S302: Delete the user plane connection with the core network.

In step S301, the original RAN node is notified to release the context of the UE, so that the original RAN node stops paging at the RAN level, that is, the AMF will control the original RAN node to stop paging the UE.

In the embodiment of the present invention, step S102: determining that the RAN node serving the UE changes, notifying the original RAN node to release the context of the UE and the user plane connection, and further comprising:

When it is determined that the RAN node serving the UE changes, notifying the original RAN node to release the context of the UE and the user plane connection, requesting the session management function SMF to deactivate the protocol data unit session (PDU session), the request is for requesting The SMF deactivates the user plane connection to cause the SMF to delete the user plane configuration of the PDU session.

In the embodiment of the present invention, when the registration update request message sent by the UE in the idle state is received in the first case mentioned above, the specific implementation process of the processing method in which the UE and the network state do not match As shown in Figure 4. Specifically, when the UE leaves the paging response area of the current RAN node and enters the RAN node coverage area that does not support RRC inactive, the UE sends a registration update request message to the AMF. After receiving the registration update request message, the AMF searches for the context of the UE. If it is determined that the current UE is already in the connected state, and the RAN anchor node serving the UE is changed from the old RAN anchor node to the new RAN node, then the RAN anchor node that previously served the UE in the context is The old RAN anchor node sends a Release N2 Connection Request message requesting to release the N2 connection between the RAN anchor node and the AMF.

The AMF sends a request to deactivate the PDU session to the SMF at the same time or after receiving the N2 connection release response message to the RAN anchor node that served the UE, requesting the SMF to deactivate the user plane connection. When the RAN anchor node that previously served the UE receives the release N2 connection request message, if the RAN level paging is currently being performed, the RAN level paging is stopped, and the RAN anchor node that previously served the UE is released. The context of the UE. After receiving the request to deactivate the PDU session, the SMF will configure the User Plane Function (UPF) to delete the user plane tunnel. If the UPF is performing data transmission at this time, the UPF buffers the downlink data and triggers a Downlink data Notification process. After receiving the response of the RAN anchor node and the SMF that previously served the UE, the AMF returns a registration update Accept message to the UE.

When the AMF receives the non-access stratum message sent by the UE or the message of the N2 interface sent by the RAN node, if the AMF determines that the UE enters a disallowed area or a prohibited area at this time, the AMF Notifying the SMF serving the PDU session for the PDU session in which the user plane is connected, the UE only receives the high priority service. Wherein the non-allowed area and the forbidden area, and the governed prioritized services are terms defined in the 3GPP TS 23.501 protocol, the high priority The service can be an emergency call service or the like. In a specific implementation process, the AMF may further determine that there is a PDU session in which the user plane is connected according to the PDU session that is previously deleted by the RAN anchor node of the UE. The RAN anchor node that previously served the UE may indicate that the deleted PDU session is indicated in the N2 connection release response message, thereby ensuring that the RAN anchor node serving the UE before the AMF notification releases the user plane connection existing by the UE .

In the embodiment of the present invention, when in the second case mentioned above, that is, when the UE sends uplink data in the idle state, and the AMF receives the request message of the UE, The specific implementation process of the processing method in which the UE and the network state do not match is shown in FIG. 5. Specifically, when the UE leaves the paging response area of the current RAN node and enters the RAN node coverage area that does not support RRC inactive, if there is uplink data to be sent, the UE determines whether the current RAN node allocation is removed. Registration area. If not, the service request process is initiated. Otherwise, the registration update process is initiated, and the active flag is carried.

After the AMF receives the request message when the UE sends the uplink data in the idle state, searching for the context of the UE, if it is determined that the current UE is already in the connected state and the RAN node of the serving UE changes, In the context, the RAN anchor node (i.e., the old RAN anchor node) that previously served the UE transmits a Release N2 Connection Request message requesting release of the N2 connection between the RAN anchor node and the AMF. When the RAN anchor node that previously served the UE receives the N2 connection release request message, if the RAN level paging is currently being performed, the RAN level paging is stopped, and the RAN anchor node releases the context of the UE. And sending, by the AMF, an interface message to the SMF to connect the SMF and the AMF, and acquiring uplink tunnel information of the PDU session to the SMF. After receiving the interface message between the SMF and the UPF, the SMF finds that the session connection user plane of the current PDU session is in an active state, and first requests the UPF to deactivate the user plane. If the UPF is performing data transmission at this time, the UPF is performing data transmission, and the UPF buffers downlink data, and triggers a Downlink data Notification process. The SMF receives the Downlink data Notifiation of the UPF and suspends the process.

In the embodiment of the present invention, if the service request message of the UE is received, the method further includes: requesting a session management function (SMF) according to the protocol data unit session PDU session specified in the service request message. That is, SMF) deactivates the PDU session and then activates the PDU session.

In a specific implementation process, when the UE and the network status do not match, the SMF is requested to deactivate the PDU session according to the PDU session specified in the service request message. Since the RAN node currently serving the UE changes, the AMF requests the new RAN node to establish an air interface connection for the UE, and forwards the downlink tunnel information allocated by the RAN node to the PDU session to the SMF. After receiving the downlink tunnel information, the SMF performs user plane configuration and reactivates the new user plane tunnel. In addition, the new RAN node configures the RRC connection for the UE.

Embodiment 2

Based on the same inventive concept as the first embodiment of the present invention, please refer to FIG. 6. The second embodiment of the present invention further provides a processing apparatus for user equipment UE and network state mismatch, which is applied to an access and mobility management function (AMF). ),include:

The first determining module 10 is configured to: when receiving the non-access stratum message sent by the UE or the message of the N2 interface sent by the radio access network (RAN) node, determining that the UE is in a connected state on the network side;

The second determining module 20 is configured to determine that the RAN node serving the UE changes, and notify the original RAN node to release the context of the UE and the existing user plane connection.

In the embodiment of the present invention, the apparatus further includes: a receiving module, configured to: receive an initial non-access stratum message sent by the UE in an idle state, where the idle state is the radio resource control (RRC) of the UE The connection management idle state entered by the non-access stratum after the inactive state enters the RRC idle state.

In the embodiment of the present invention, the receiving module is configured to: receive a registration update request message sent by the UE in the idle state; or, when the UE sends uplink data in the idle state, receive the The request message of the UE.

In the embodiment of the present invention, the first determining module 10 is configured to: determine that the UE is in a connected state on the network side according to the saved context of the UE.

In the embodiment of the present invention, the second determining module 20 is configured to: determine, according to the saved context of the UE, that the RAN node serving the UE saved in the context is an original RAN node; according to the original RAN The node and the RAN node that forwards the initial non-access stratum message currently serving the UE determine that the RAN node serving the UE changes.

In the embodiment of the present invention, the second determining module 20 is configured to: notify the original RAN node to release the context of the UE; and delete the user plane connection with the core network.

In the embodiment of the present invention, the second determining module 20 is further configured to: notify the original RAN node to release the context of the UE, so that the original RAN node stops paging at the RAN level.

In the embodiment of the present invention, the second determining module 20 is configured to: determine that the RAN node that forwards the non-access stratum message or the RAN node that sends the N2 interface message is different from the saved RAN node in the UE context, It is determined that the RAN node serving the UE has changed.

In the embodiment of the present invention, the second determining module 20 is further configured to: request a session management function (SMF) to deactivate a protocol data unit session (PDU session), where the request is used to request the SMF to deactivate a user plane connection, The SMF is configured to delete the user plane configuration of the PDU session.

In the embodiment of the present invention, after the receiving the non-access stratum message sent by the UE or the message of the N2 interface sent by the radio access network RAN node, the apparatus further includes a third determining module, configured to: determine The UE enters a disallowed area or a forbidden area, and notifies a request session management function SMF corresponding to a protocol data unit session (PDU session) that serves the user plane connection, and the UE only receives the high priority service.

In the embodiment of the present invention, if the service request message of the UE is received, the device further includes: a requesting module, configured to request session management according to a protocol data unit session (PDU session) specified in the service request message. The function (SMF) deactivates the PDU session and then activates the PDU session.

The method steps of the working principle that the user equipment UE and the network state do not match in the embodiment of the present invention are the same as the processing method of the foregoing user equipment UE and the network state do not match, and details are not described herein again.

Based on the same inventive concept, with reference to FIG. 7, the present invention further provides a processing device for a user equipment UE and a network state mismatch, including a processor 30, a memory 40, and an external communication interface 50; wherein, the external communication interface 50, for receiving and transmitting data under the control of the processor 30;

The processor 30 is configured to read a program in the memory 40 and perform the following process:

When the external communication interface 50 receives the non-access stratum message sent by the UE or the message of the N2 interface sent by the radio access network RAN node, it is determined that the UE is in a connected state on the network side;

Determining that the RAN node serving the UE changes, notifying the original RAN node to release the context of the UE and the existing user plane connection.

Here, in FIG. 7, the bus architecture may include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 30 and various circuits of memory represented by memory 40. The bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein. The bus interface provides an interface. The external communication interface 50 can be a plurality of elements that provide means for communicating with various other devices on a transmission medium. The processor 30 is responsible for managing the bus architecture and general processing, and the memory 40 can store data used by the processor 30 in performing operations.

A further aspect of the present invention provides a computer device. In a specific implementation, the computer device may be a network side device, or may be a terminal, including a memory, a processor, and stored in the memory. A computer program executable on the processor, the processor executing the computer program to implement the methods described in the various aspects described above.

Yet another aspect of an embodiment of the present invention provides a computer readable storage medium having stored thereon a computer program that, when executed by a processor, implements the methods described in the various aspects described above.

In the technical solution of the embodiment of the present invention, when receiving the non-access stratum message sent by the UE or the message of the N2 interface sent by the radio access network RAN node, determining that the UE is in a connected state on the network side; determining The RAN node serving the UE changes, notifying the original RAN node to release the context of the UE and the existing user plane connection. That is, when it is determined that the network status of the RAN node of the UE and the currently serving UE does not match, the original RAN node is notified to release the context of the UE and the existing user plane connection, thereby solving the waste of air interface resources and packet loss. Technical issues reduce paging overhead and packet loss.

Those skilled in the art will appreciate that embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) including computer usable program code.

The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

While the preferred embodiment of the invention has been described, it will be understood that Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and the modifications and

It is apparent that those skilled in the art can make various modifications and variations to the invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and modifications of the invention

Claims

A processing method for the user equipment UE and the network state mismatch is applied to the access and mobility management function AMF, and the method includes:

When receiving the non-access stratum message sent by the UE or the message of the N2 interface sent by the radio access network RAN node, determining that the UE is in a connected state on the network side;

Determining that the RAN node serving the UE changes, notifying the original RAN node to release the context of the UE and the existing user plane connection.
The method according to claim 1, wherein the receiving the non-access stratum message sent by the UE comprises:

And receiving an initial non-access stratum message sent by the UE in an idle state, where the idle state is a connection management idle state that the non-access stratum enters after the UE enters an RRC idle state from a radio resource control RRC inactive state.
The method according to claim 2, wherein the receiving the initial non-access stratum message sent by the UE in an idle state comprises:

Receiving a registration update request message sent by the UE in the idle state; or

When the UE sends uplink data in the idle state, receiving a request message of the UE.
The method according to claim 1, wherein the determining that the UE is in a connected state on the network side comprises:

Determining that the UE is in a connected state on the network side according to the saved context of the UE.
The method of claim 1, wherein the notifying the original RAN node to release the context and user plane connection of the UE comprises:

Notifying the original RAN node to release the context of the UE;

Delete the user plane connection to the core network.
The method of claim 5, wherein the method further comprises:

The original RAN node is notified to release the context of the UE such that the original RAN node stops paging at the RAN level.
The method according to claim 1, wherein the determining that the RAN node serving the UE changes comprises:

Determining that the RAN node that forwards the non-access stratum message or the RAN node that sends the N2 interface message is different from the RAN node in the saved UE context, determines that the RAN node serving the UE changes.
The method according to claim 1, wherein the determining that the RAN node serving the UE is changed, notifying the original RAN node to release the context and the user plane connection of the UE, further comprising:

The request session management function SMF deactivates the protocol data unit session PDU session, the request is for requesting the SMF to deactivate the user plane connection, so that the SMF deletes the user plane configuration of the PDU session.
The method according to claim 1, after the receiving the non-access stratum message sent by the UE or the message of the N2 interface sent by the RAN node of the radio access network, the method includes:

Determining that the UE enters the disallowed area or the forbidden area, and notifies the request session management function SMF that serves the protocol data unit session PDU session to which the user plane connection belongs, and the UE only has high priority service reachable.
The method of claim 3, wherein if the service request message of the UE is received, the method further comprises:

And requesting the session management function SMF to deactivate the PDU session according to the protocol data unit session PDU session specified in the service request message, and then activating the PDU session.
A processing device that does not match a user equipment UE and a network state, and includes:

a first determining module, configured to: when receiving a non-access stratum message sent by the UE or a message of an N2 interface sent by a radio access network RAN node, determining that the UE is in a connected state on a network side;

And a second determining module, configured to determine that the RAN node serving the UE changes, and notify the original RAN node to release the context of the UE and the existing user plane connection.
The device according to claim 11, wherein the device further comprises a receiving module, configured to:

And receiving an initial non-access stratum message sent by the UE in an idle state, where the idle state is a connection management idle state that the non-access stratum enters after the UE enters an RRC idle state from a radio resource control RRC inactive state.
The apparatus according to claim 12, wherein said receiving module is configured to:

Receiving a registration update request message sent by the UE in the idle state; or

When the UE sends uplink data in the idle state, receiving a request message of the UE.
The apparatus according to claim 11, wherein said first determining module is configured to:

Determining that the UE is in a connected state on the network side according to the saved context of the UE.
The apparatus according to claim 11, wherein said second determining module is configured to:

Notifying the original RAN node to release the context of the UE;

Delete the user plane connection to the core network.
The apparatus according to claim 15, wherein said second determining module is further configured to:

The original RAN node is notified to release the context of the UE such that the original RAN node stops paging at the RAN level.
The apparatus according to claim 11, wherein said second determining module is configured to:

Determining that the RAN node that forwards the non-access stratum message or the RAN node that sends the N2 interface message is different from the RAN node in the saved UE context, determines that the RAN node serving the UE changes.
The device according to claim 11, wherein the second determining module is further configured to:

The request session management function SMF deactivates the protocol data unit session PDU session, the request is for requesting the SMF to deactivate the user plane connection, so that the SMF deletes the user plane configuration of the PDU session.
The apparatus according to claim 11, wherein after receiving the non-access stratum message sent by the UE or the message of the N2 interface sent by the radio access network RAN node, the apparatus further includes a third determination. Module for:

Determining that the UE enters the disallowed area or the forbidden area, and notifies the request session management function SMF that serves the protocol data unit session PDU session to which the user plane connection belongs, and the UE only has high priority service reachable.
The device of claim 13, wherein the device further comprises:

And a requesting module, configured to request the session management function SMF to deactivate the PDU session according to the protocol data unit session PDU session specified in the service request message, and then activate the PDU session.
A computer apparatus comprising a memory, a processor, and a computer program stored on the memory and operable on the processor, wherein the processor executes the computer program to implement claims 1 to 10 The steps of any of the methods described in the claims.
A computer readable storage medium having stored thereon a computer program, wherein the computer program, when executed by a processor, implements the steps of the method of any of claims 1 to 10.