WO2019033945A1 - 一种ue和网络状态不匹配的处理方法及装置 - Google Patents

一种ue和网络状态不匹配的处理方法及装置 Download PDF

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Publication number
WO2019033945A1
WO2019033945A1 PCT/CN2018/098683 CN2018098683W WO2019033945A1 WO 2019033945 A1 WO2019033945 A1 WO 2019033945A1 CN 2018098683 W CN2018098683 W CN 2018098683W WO 2019033945 A1 WO2019033945 A1 WO 2019033945A1
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Prior art keywords
ran node
determining
context
user plane
receiving
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English (en)
French (fr)
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王胡成
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China Academy of Telecommunications Technology CATT
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China Academy of Telecommunications Technology CATT
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Priority claimed from CN201710855403.8A external-priority patent/CN109548109B/zh
Application filed by China Academy of Telecommunications Technology CATT filed Critical China Academy of Telecommunications Technology CATT
Priority to US16/639,124 priority Critical patent/US11212864B2/en
Priority to KR1020207007501A priority patent/KR20200038295A/ko
Priority to JP2020508609A priority patent/JP2020530731A/ja
Priority to EP18846130.5A priority patent/EP3672327B1/en
Publication of WO2019033945A1 publication Critical patent/WO2019033945A1/zh
Anticipated expiration legal-status Critical
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point

Definitions

  • 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.
  • 3GPP 3rd Generation Partnership Project
  • 5G The Fifith Generation Mobile Network
  • 3GPP introduces a new RRC (Radio Resource Control) state, that is, RRC inactive (RRC inactive state).
  • RRC inactive Radio Resource Control inactive state
  • the UE User Equipment
  • 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).
  • RAN level Paging RAN level paging
  • the RAN node 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.
  • Paging Area Update the RAN node allocates a paging area for the UE in the RRC inactive state.
  • 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.
  • the AMF Access and Mobility Management Function
  • the AMF 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.
  • the connection management state of the UE is divided into CM-IDLE (Idle State) and CM-CONNECTED (Connected State).
  • CM-IDLE Idle State
  • CM-CONNECTED Connected State
  • 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.
  • 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.
  • 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 including: receiving non-access sent by the UE
  • the RAN node serving the UE is determined to be changed, and the original RAN node is notified to release the UE.
  • 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)
  • RRC radio resource
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • the determining that the RAN node serving the UE changes further comprising: requesting a session management function (SMF) to deactivate the protocol data unit session (PDU)
  • SMF session management function
  • PDU protocol data unit session
  • 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.
  • 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.
  • PDU session protocol data unit session
  • 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.
  • AMF access and mobility management function
  • 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.
  • RRC radio resource control
  • 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.
  • 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.
  • the second determining module is configured to:
  • 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.
  • 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.
  • 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.
  • SMF session management function
  • 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.
  • SMF request session management function
  • 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.
  • 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
  • PDU session protocol data unit session
  • 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.
  • 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 radio access network (RAN) node 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.
  • 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.
  • 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.
  • the technical solution in the embodiment of the present invention is to solve the above technical problem, and the general idea is as follows:
  • RAN radio access network
  • the radio access network (RAN) node 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.
  • 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;
  • RAN radio access network
  • 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.
  • step S101 to step S102 is as follows:
  • 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.
  • 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.
  • RRC radio resource control
  • 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.
  • 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.
  • 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.
  • 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.
  • the UE 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.
  • 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.
  • 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.
  • the original RAN node 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.
  • 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.
  • 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.
  • 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.
  • the step of: determining a service 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.
  • the AMF 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.
  • 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.
  • 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.
  • 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.
  • 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:
  • the session management function SMF 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.
  • PDU session protocol data unit session
  • 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.
  • 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.
  • 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.
  • UPF User Plane Function
  • the UPF buffers the downlink data and triggers a Downlink data Notification process.
  • the AMF 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.
  • the AMF 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.
  • 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.
  • 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 .
  • the UE 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.
  • the AMF 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,
  • the RAN anchor node i.e., the old RAN anchor node
  • the 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.
  • 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.
  • 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.
  • 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.
  • SMF session management function
  • the SMF 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.
  • 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).
  • AMF access and mobility management function
  • 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;
  • RAN radio access network
  • 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.
  • 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
  • RRC radio resource control
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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,
  • SMF session management function
  • the SMF is configured to delete the user plane configuration of the PDU session.
  • the apparatus 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.
  • PDU session protocol data unit session
  • 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 deactivates the PDU session and then activates the PDU session.
  • 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:
  • the external communication interface 50 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;
  • 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.
  • the computer device may be a network side device, or may be a terminal, including a memory, a processor, and stored in the memory.
  • 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.
  • the RAN node serving the UE 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.
  • 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 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.

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  • Mobile Radio Communication Systems (AREA)

Abstract

本发明公开了一种UE和网络状态不匹配的处理方法及装置，应用于接入与移动性管理功能(AMF)，其中，所述方法包括：在接收所述UE发送的非接入层消息或者无线接入网络(RAN)节点发送的N2接口的消息时，确定所述UE在网络侧处于连接态；确定服务所述UE的RAN节点发生改变，通知原RAN节点释放所述UE的上下文和存在的用户面连接。用于解决现有技术存在空口资源浪费和丢包的技术问题，减少了寻呼开销和丢包。

Description

一种UE和网络状态不匹配的处理方法及装置
本申请要求在2017年8月14日提交中国专利局、申请号为201710693914.4、发明名称为“一种UE和网络状态不匹配的处理方法及装置”的中国专利申请的优先权，以及要求在2017年9月20日提交中国专利局、申请号为201710855403.8、发明名称为“一种UE和网络状态不匹配的处理方法及装置”的中国专利申请的优先权。其全部内容通过引用结合在本申请中。
技术领域
本发明涉及通信技术领域，特别涉及一种UE和网络状态不匹配的处理方法及装置。
背景技术
目前3GPP(3rd Generation Partnership Project)已经确定了5G(The Fifith Generation Mobile Network，第五代移动通信)网络的架构参考模块。针对该架构，3GPP引入了一种新的RRC(Radio Resource Control，无线资源控制)状态，即RRC inactive(RRC非激活状态)。当UE(User Equipment，用户终端)处于该状态时，RAN(Radio Acess Network，无线接入网络)节点和UE之间的RRC连接已经释放，但Nx接口的连接仍然保留。
由于RRC inactive状态希望做到对核心网透明，即核心网仍然认为UE一直处于连接态，因此RAN节点会收到此状态下UE的下行信令或数据，此时RAN节点需要寻呼UE，即RAN level Paging(RAN级别的寻呼)。
为了支持RAN level Paging，RAN节点需要支持RAN level(RAN级别)的Paging area update(寻呼区域更新)，也就是说，RAN节点会为处于RRC inactive状态的UE分配Paging area(寻呼区域)。当UE移出该Paging area时，UE需要发起Paging area update过程，RAN节点此时会为UE分配新的Paging area。如果由于UE的移动导致了当前服务UE的RAN anchor节点发生改变，则需要在RAN anchor节点之间进行Context(上下文)传输，并且向核心网更新N2接口(N2接口为RAN和AMF之间的接口)的连接。
此外，为了支持RAN level的Paging area update，AMF(Access and Mobility Management Function，即接入与移动性管理功能)需要向RAN anchor节点提供辅助信息，例如registration area(注册区域)，allowed DRX(允许非连续接收)等，其中registration area是为了保证RAN level Paging area(RAN级别寻呼区域)分配时，在registration area范围内。
而且，在AMF中，UE的连接管理状态分为CM-IDLE(空闲态)和CM-CONNECTED(连接态)。当RAN和AMF之间的接口连接被释放后，则AMF认为UE进入CM-IDLE 状态，否则AMF认为UE一直处于连接态。
具体来讲，当5G RAN为UE激活RRC inactive状态后，RAN anchor节点会收到下行数据，并寻呼UE，此时如果UE移出了当前的RAN Paging area而进入一个不支持RRC inactive状态的RAN节点覆盖时，UE将无法保持在RRC inactive状态，也无法收到原RAN anchor节点的RAN level Paging。这样原来的RAN anchor节点将得不到UE的Paging响应，并在重复多次RAN level Paging后失败，这将增加寻呼开销，进而导致空口资源浪费和丢包。
可见，现有技术存在空口资源浪费和丢包的技术问题。
发明内容
本发明实施例提供一种UE和网络状态不匹配的处理方法及装置，用于解决现有技术存在空口资源浪费和丢包的技术问题，减少了寻呼开销和丢包。
一方面，本发明实施例提供了一种用户设备(UE)和网络状态不匹配的处理方法，应用于接入与移动性管理功能(AMF)，包括：在接收所述UE发送的非接入层消息或者无线接入网络(RAN)节点发送的N2接口的消息时，确定所述UE在网络侧处于连接态；确定服务所述UE的RAN节点发生改变，通知原RAN节点释放所述UE的上下文和存在的用户面连接。
可选地，所述接收所述UE发送的非接入层消息，包括：接收所述UE在空闲态发送的初始非接入层消息，其中，所述空闲态为所述UE从无线资源控制(RRC)非激活状态进入RRC空闲状态后非接入层进入的连接管理空闲态。
可选地，所述接收所述UE在空闲态发送的初始非接入层消息，包括：接收所述UE在所述空闲态下发送的注册更新请求消息；或，在所述UE在所述空闲态下发送上行数据时，接收所述UE的请求消息。
可选地，所述确定所述UE在网络侧处于连接态，包括：根据保存的所述UE的所述上下文，确定所述UE在网络侧处于连接状态。
可选地，所述通知原RAN节点释放所述UE的上下文和用户面连接，包括：通知原RAN节点释放所述UE的上下文；删除与核心网之间的用户面连接。
可选地，所述方法还包括：通知原RAN节点释放所述UE的上下文，使得原RAN节点停止RAN级别的寻呼。
可选地，所述确定服务所述UE的RAN节点发生改变，包括：确定转发所述非接入层消息的RAN节点或者发送N2接口消息的RAN节点，与保存的所述UE上下文中的RAN 节点不同时，确定服务所述UE的RAN节点发生改变。
可选地，所述确定服务所述UE的RAN节点发生改变，通知原RAN节点释放所述UE的上下文和用户面连接，还包括：请求会话管理功能(SMF)去激活协议数据单元会话(PDU session)，所述请求用于请求所述SMF去激活用户面连接，以使所述SMF删除所述PDU session的用户面配置。
可选地，在所述接收所述UE发送的非接入层消息或者无线接入网络RAN节点发送的N2接口的消息之后，包括：确定所述UE进入不允许区域或者禁止区域，通知服务所述用户面连接所属的协议数据单元会话(PDU session)的请求会话管理功能SMF，所述UE仅高优先级业务可达。
可选地，若接收到所述UE的服务请求消息，所述方法还包括：根据所述服务请求消息中指定的协议数据单元会话(PDU session)，请求会话管理功能SMF去激活所述PDU session，然后再激活所述PDU session。
另一方面，本发明实施例还提供了一种用户设备UE和网络状态不匹配的处理装置，应用于接入与移动性管理功能(AMF)，包括：第一确定模块，用于在接收所述UE发送的非接入层消息或者无线接入网络(RAN)节点发送的N2接口的消息时，确定所述UE在网络侧处于连接态；第二确定模块，用于确定服务所述UE的RAN节点发生改变，通知原RAN节点释放所述UE的上下文和存在的用户面连接。
可选地，所述装置还包括接收模块，用于：接收所述UE在空闲态发送的初始非接入层消息，其中，所述空闲态为所述UE从无线资源控制(RRC)非激活状态进入RRC空闲状态后非接入层进入的连接管理空闲态，然后发送的初始非接入层消息。
可选地，所述接收模块用于：接收所述UE在所述空闲态下发送的注册更新请求消息；或，在所述UE在所述空闲态下发送上行数据时，接收所述UE的请求消息。
可选地，所述第一确定模块用于：根据保存的所述UE的所述上下文，确定所述UE在网络侧处于连接状态。可选地，所述第二确定模块用于：
通知原RAN节点释放所述UE的上下文；删除与核心网之间的用户面连接。
可选地，所述第二确定模块还用于：通知原RAN节点释放所述UE的上下文，使得原RAN节点停止RAN级别的寻呼。
可选地，所述第二确定模块用于：确定转发所述非接入层消息的RAN节点或者发送N2接口消息的RAN节点，与保存的所述UE上下文中的RAN节点不同时，确定服务所述UE的RAN节点发生改变。
可选地，所述第二确定模块还用于：请求会话管理功能(SMF)去激活协议数据单元 会话(PDU session)，所述请求用于请求所述SMF去激活用户面连接，以使所述SMF删除所述PDU session的用户面配置。
可选地，在所述接收所述UE发送的非接入层消息或者无线接入网络RAN节点发送的N2接口的消息之后，所述装置还包括第三确定模块，用于：确定所述UE进入不允许区域或者禁止区域，通知服务所述用户面连接所属的协议数据单元会话(PDU session)的请求会话管理功能(SMF)，所述UE仅高优先级业务可达。
可选地，若接收到所述UE的服务请求消息，所述装置还包括：请求模块，用于根据所述服务请求消息中指定的协议数据单元会话(PDU session)，请求会话管理功能SMF去激活所述PDU session，然后再激活所述PDU session。
另一方面，本发明实施例提供了一种计算机装置，包括存储器、处理器及存储在所述存储器上并可在所述处理器上运行的计算机程序，所述处理器执行所述计算机程序时实现如上所述UE和网络状态不匹配的处理方法的步骤。
另一方面，本发明实施例提供了一种计算机可读存储介质，其上存储有计算机程序，所述计算机程序被处理器执行时实现如上所述UE和网络状态不匹配的处理方法的步骤。
本发明实施例中的上述一个或多个技术方案，至少具有如下一种或多种技术效果：
在本发明实施例的技术方案中，通过在接收所述UE发送的非接入层消息或者无线接入网络(RAN)节点发送的N2接口的消息时，确定所述UE在网络侧处于连接态；确定服务所述UE的RAN节点发生改变，通知原RAN节点释放所述UE的上下文和存在的用户面连接。也就是说，当确定所述UE和当前服务UE的RAN节点的网络状态不匹配时，通知原RAN节点释放所述UE的上下文和存在的用户面连接，从而解决了空口资源浪费和丢包的技术问题，减少了寻呼开销和丢包。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例。
图1为本发明实施例一中提供的一种UE和网络状态不匹配的处理方法的方法流程图；
图2为本发明实施例一中提供的一种UE和网络状态不匹配的处理方法中步骤S102中确定服务UE的RAN节点发生改变的步骤流程图；
图3为本发明实施例一中提供的一种UE和网络状态不匹配的处理方法中步骤S102中通知原RAN节点释放所述UE的上下文和用户面连接的步骤流程图；
图4为本发明实施例一中提供的一种UE和网络状态不匹配的处理方法中在第一种情况下接收初始非接入层消息时的过程示意图；
图5为本发明实施例一中提供的一种UE和网络状态不匹配的处理方法中在第二种情况下接收初始非接入层消息时的过程示意图；
图6为本发明实施例二提供的一种UE和网络状态不匹配的处理装置的结构示意图；
图7为本发明实施例提供的一种UE和网络状态不匹配的处理装置示意图。
具体实施方式
本发明实施例提供一种UE和网络状态不匹配的处理方法及装置，用于解决现有技术存在空口资源浪费和丢包的技术问题，减少了寻呼开销和丢包。
本发明实施例中的技术方案为解决上述的技术问题，总体思路如下：
一种用户设备(UE)和网络状态不匹配的处理方法，应用于接入与移动性管理功能(AMF)，包括：在接收所述UE发送的非接入层消息或者无线接入网络(RAN)节点发送的N2接口的消息时，确定所述UE在网络侧处于连接态；确定服务所述UE的RAN节点发生改变，通知原RAN节点释放所述UE的上下文和存在的用户面连接。
在本发明实施例的技术方案中，通过在接收所述UE发送的非接入层消息或者无线接入网络(RAN)节点发送的N2接口的消息时，确定所述UE在网络侧处于连接态；确定服务所述UE的RAN节点发生改变，通知原RAN节点释放所述UE的上下文和存在的用户面连接。也就是说，当确定所述UE和当前服务UE的RAN节点的网络状态不匹配时，通知原RAN节点释放所述UE的上下文和存在的用户面连接，从而解决了空口资源浪费和丢包的技术问题，减少了寻呼开销和丢包。
本文中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，在不做特别说明的情况下，一般表示前后关联对象是一种“或”的关系。
为了更好的理解上述技术方案，下面通过附图以及具体实施例对本发明技术方案做详细的说明，应当理解本发明实施例以及实施例中的具体特征是对本发明技术方案的详细的说明，而不是对本发明技术方案的限定，在不冲突的情况下，本发明实施例以及实施例中的技术特征可以相互结合。
实施例一
请参考图1，本发明实施例一提供了一种用户设备(UE)和网络状态不匹配的处理方 法，应用于接入与移动性管理功能(AMF)，包括：
S101：在接收所述UE发送的非接入层消息或者无线接入网络(RAN)节点发送的N2接口的消息时，确定所述UE在网络侧处于连接态；
S102：确定服务所述UE的RAN节点发生改变，通知原RAN节点释放所述UE的上下文和存在的用户面连接。
在本发明实施例中，步骤S101至步骤S102的具体实现过程如下：
在具体实施过程中，所述AMF接收所述UE发送的接入层消息，可以为，registration update消息，Service Request(服务请求)消息，等等。在本发明实施例中，步骤：接收所述UE发送的非接入层消息，具体为：接收所述UE在空闲态发送的初始非接入层消息，其中，所述空闲态为所述UE从无线资源控制(RRC)非激活状态进入RRC空闲状态后非接入层进入的连接管理空闲态。比如，当5G RAN为UE激活RRC inactive状态后，RAN anchor节点会收到下行数据，并寻呼所述UE。如果所述UE移出了当前的RAN paging area，而进入了一个不支持RRC inactive状态的RAN节点覆盖区域时，所述UE将无法保持在RRC inactive状态，且所述UE从当前的连接管理连接态切换为连接管理空闲态。
在本发明实施例中，所述初始非接入层消息具体可以为所述registration update消息，Service Request消息，等等。因此，在具体实施过程中，步骤：接收所述UE在空闲态发送的初始非接入层消息，可以有以下两种情况，但又不仅限于以下两种情况。
第一种情况
第一种情况为：接收所述UE在所述空闲态下发送的注册更新请求消息；比如，当所述UE离开当前RAN节点的寻呼区域，进入不支持RRC inactive状态的RAN节点覆盖区域时，所述UE直接向所述AMF发送注册更新请求消息。
第二种情况
第二种情况为：在所述UE在所述空闲态下发送上行数据时，接收所述UE的请求消息。比如，当所述UE离开当前RAN节点的寻呼区域，进入不支持RRC inactive的RAN节点覆盖区域，当所述UE有上行数据需要发送，则所述UE需要进一步判断当前移动是否移出了当前RAN节点分配的registration area。进一步地，如果没有，则发起service request过程。也就是说，当所述UE在所述空闲态下发送上行数据时，接收所述UE的请求消息，所述请求消息可以是服务请求消息。
在具体实施过程中，当所述UE进入了RRC空闲态，但所述UE并没有移出当前的注册区域时，所述UE仅发起RAN级别位置更新过程，不发起任何非接入层过程。当收到所述UE的RAN级别位置更新请求的RAN节点在确定不能为所述UE激活RRC inactive状 态之后，向核心网的AMF发起N2释放过程。
在具体实施过程中，由于核心网认为所述UE一直处于连接态，即在确定所述UE在网络侧处于连接态时，原RAN节点会收到此状态下UE的下行信令或数据，此时原RAN节点需要寻呼所述UE。在具体实施过程中，当确定所述UE在网络侧处于连接态时，进一步确定服务所述UE的RAN节点是否发生改变。一旦确定服务所述UE的RAN节点发生改变时，通知原RAN节点释放所述UE的上下文和存在的用户面连接，其中，所述UE的上下文包括移动性上下文和会话连接的上下文。这样，原RAN节点将不再寻呼所述UE，从而减少了寻呼开销。
在本发明实施例中，步骤：确定服务所述UE的RAN节点发生改变，包括：确定服务所述UE的RAN节点发生改变，包括：确定转发所述非接入层消息的RAN节点或者发送N2接口消息的RAN节点，与保存的所述UE上下文中的RAN节点不同时，确定服务所述UE的RAN节点发生改变。
在本发明实施例中，在采用通过接收所述UE发送的非接入层消息，来确定所述UE在网络侧处于连接态，进而确定服务所述UE的RAN节点发生改变的方案中，请参考图2，在步骤S102中，确定服务所述UE的RAN节点发生改变，包括：
S201：根据保存的所述UE的所述上下文，确定所述上下文中保存的服务所述UE的RAN节点为原RAN节点；
S202：根据所述原RAN节点和转发所述初始非接入层消息的当前服务所述UE的RAN节点，确定服务所述UE的RAN节点发生改变。
步骤S201至步骤S202的具体实现过程，也就是说，确定转发所述非接入层消息的RAN节点，与保存的所述UE上下文中的RAN节点不同时，确定服务所述UE的RAN节点发生改变。
在本发明实施例中，在采用接收RAN节点发送的N2接口的消息时确定所述UE在网络侧处于连接态，并确定服务所述UE的RAN节点发生改变的方案中，步骤：确定服务所述UE的RAN节点发生改变的具体实现过程为，确定发送N2接口消息的RAN节点，与保存的所述UE上下文中的RAN节点不同时，确定服务所述UE的RAN节点发生改变。
在具体实施过程中，当所述AMF收到当前服务所述UE的RAN节点发送的N2接口的释放消息后，确定当前所述UE在网络侧处于连接态，并且自身保存的UE上下文中记载的服务所述UE的RAN节点与当前服务所述UE的RAN节点不相同，则所述AMF请求原RAN节点，即UE上下文中记载的服务UE的RAN节点，释放UE的上下文和可能存在的用户面连接。
当然，对于本领域的技术人员来说，还可以根据实际需要，通过设计不同的方案来确定服务所述UE的RAN节点是否发生改变，在此就不一一赘述了。
在本发明实施例中，步骤：确定所述UE在网络侧处于连接态，具体实现过程可以是：根据保存的所述UE的所述上下文，确定所述UE在网络侧处于连接状态。
在本发明实施例中，请参考图3，在步骤S102中，通知原RAN节点释放所述UE的上下文和用户面连接，包括：
S301：通知原RAN节点释放所述UE的上下文；
S302：删除与核心网之间的用户面连接。
其中，步骤S301中通知原RAN节点释放所述UE的上下文，使得原RAN节点停止RAN级别的寻呼，也就是说，所述AMF将控制原RAN节点停止寻呼所述UE。
在本发明实施例中，步骤S102：确定服务所述UE的RAN节点发生改变，通知原RAN节点释放所述UE的上下文和用户面连接，还包括：
在确定服务所述UE的RAN节点发生改变，通知原RAN节点释放所述UE的上下文和用户面连接时，请求会话管理功能SMF去激活协议数据单元会话(PDU session)，所述请求用于请求所述SMF去激活用户面连接，以使所述SMF删除所述PDU session的用户面配置。
在本发明实施例中，当在上述提到的第一种情况下，接收所述UE在空闲态下发送的注册更新请求消息时，所述UE和网络状态不匹配的处理方法的具体实现过程如图4所示。具体来讲，当所述UE离开当前RAN节点的寻呼响应区域，进入不支持RRC inactive的RAN节点覆盖区域时，所述UE向所述AMF发送注册更新请求消息。所述AMF接收到所述注册更新请求消息后，查找所述UE的上下文。如果确定当前所述UE已经处于连接态，且服务所述UE的RAN anchor节点由旧的RAN anchor节点变为新的RAN节点，则向所述上下文中之前服务所述UE的RAN anchor节点(即旧的RAN anchor节点)发送释放N2连接请求消息，请求释放该RAN anchor节点和所述AMF之间的N2连接。
所述AMF同时或者在收到之前服务所述UE的RAN anchor节点返回N2连接释放响应消息之后，向所述SMF发送去激活PDU session的请求，请求所述SMF去激活用户面连接。之前服务所述UE的RAN anchor节点接收到所述释放N2连接请求消息时，如果当前正在进行RAN级别的寻呼，则停止RAN级别的寻呼，并且之前服务所述UE的RAN anchor节点释放所述UE的上下文。所述SMF收到去激活PDU session的请求后，将配置UPF(User Plane Function，用户平面功能)进行用户面隧道删除。如果此时所述UPF正在进行数据传输，则所述UPF缓存下行数据，并且触发Downlink data Notification(下行数 据更新)过程。所述AMF收到之前服务所述UE的RAN anchor节点和所述SMF的响应后，向所述UE返回registration update Accept(接受注册更新)消息。
在所述AMF接收所述UE发送的非接入层消息或者所述RAN节点发送的N2接口的消息时，如果所述AMF确定所述UE此时进入了不允许区域或者禁止区域，所述AMF针对存在所述用户面连接的PDU session，通知服务所述PDU session的SMF，所述UE仅接收高优先级业务。其中，所述不允许区域(non-allowed area)和所述禁止区域(forbidden area)，以及所述高优先级业务(regulatory prioritized services)为3GPP TS 23.501协议中定义的术语，所述高优先级业务可以是紧急呼叫业务等。在具体实施过程中，所述AMF可根据之前服务所述UE的RAN anchor节点所删除的PDU session，进一步地确定出存在用户面连接的PDU session。之前服务所述UE的RAN anchor节点可通过在N2连接释放响应消息中指示被删除的PDU session，从而保证了所述AMF通知之前服务所述UE的RAN anchor节点释放所述UE存在的用户面连接。
在本发明实施例中，当在上述提到的第二种情况下，也就是说，当所述UE在所述空闲态下发送上行数据，所述AMF接收所述UE的请求消息时，所述UE和网络状态不匹配的处理方法的具体实现过程如图5所示。具体来讲，当所述UE离开当前RAN节点的寻呼响应区域，进入不支持RRC inactive的RAN节点覆盖区域时，如果有上行数据需要发送，则所述UE判断是否移出了当前RAN节点分配的registration area。如果没有，则发起service Request过程，否则发起registration update过程，携带active flag(激活标识)。
当所述AMF收到所述UE在所述空闲态下发送上行数据时的请求消息后，查找所述UE的上下文，如果确定当前UE已经处于连接态并且服务UE的RAN节点发生了变化，则向所述上下文中，之前服务所述UE的RAN anchor节点(即旧的RAN anchor节点)发送释放N2连接请求消息，请求释放该RAN anchor节点和所述AMF之间的N2连接。之前服务所述UE的RAN anchor节点收到该N2连接释放请求消息时，如果当前正在进行RAN级别的寻呼，则停止RAN级别的寻呼，并且该RAN anchor节点释放所述UE的上下文。所述AMF同时向所述SMF发送去所述SMF与所述AMF之间连接的接口消息，向所述SMF获取所述PDU session的上行隧道信息。当所述SMF接收到去所述SMF与所述UPF之间连接的接口消息后，发现当前PDU session的会话连接用户面处于激活状态，则首先请求所述UPF去激活用户面。如果此时所述UPF正在进行数据传输，则所述UPF正在进行数据传输，则所述UPF缓存下行数据，并且触发Downlink data Notification过程。所述SMF收到所述UPF的Downlink data Notifiation，挂起该过程。
在本发明实施例中，若接收到所述UE的服务请求消息，所述方法还包括：根据所述 服务请求消息中指定的协议数据单元会话PDU session，请求会话管理功能SMF(Session Management Function，即SMF)去激活所述PDU session，然后再激活所述PDU session。
在具体实施过程中，在所述UE和网络状态不匹配时，根据所述服务请求消息中指定的PDU session，请求所述SMF去激活所述PDU session。由于当前服务所述UE的RAN节点发生了改变，则所述AMF请求新的RAN节点为所述UE建立空口连接，并且转发该RAN节点为所述PDU session分配的下行隧道信息到所述SMF。所述SMF收到下行隧道信息后，进行用户面配置，重新激活新的用户面隧道。此外，新的RAN节点为所述UE配置RRC连接。
实施例二
基于与本发明实施例一同样的发明构思，请参考图6，本发明实施例二还提供了一种用户设备UE和网络状态不匹配的处理装置，应用于接入与移动性管理功能(AMF)，包括：
第一确定模块10，用于在接收所述UE发送的非接入层消息或者无线接入网络(RAN)节点发送的N2接口的消息时，确定所述UE在网络侧处于连接态；
第二确定模块20，用于确定服务所述UE的RAN节点发生改变，通知原RAN节点释放所述UE的上下文和存在的用户面连接。
在本发明实施例中，所述装置还包括接收模块用于：接收所述UE在空闲态发送的初始非接入层消息，其中，所述空闲态为所述UE从无线资源控制(RRC)非激活状态进入RRC空闲状态后非接入层进入的连接管理空闲态。
在本发明实施例中，所述接收模块用于：接收所述UE在所述空闲态下发送的注册更新请求消息；或，在所述UE在所述空闲态下发送上行数据时，接收所述UE的请求消息。
在本发明实施例中，第一确定模块10用于：根据保存的所述UE的所述上下文，确定所述UE在网络侧处于连接状态。
在本发明实施例中，第二确定模块20用于：根据保存的所述UE的所述上下文，确定所述上下文中保存的服务所述UE的RAN节点为原RAN节点；根据所述原RAN节点和转发所述初始非接入层消息的当前服务所述UE的RAN节点，确定服务所述UE的RAN节点发生改变。
在本发明实施例中，第二确定模块20用于：通知原RAN节点释放所述UE的上下文；删除与核心网之间的用户面连接。
在本发明实施例中，第二确定模块20还用于：通知原RAN节点释放所述UE的上下文，使得原RAN节点停止RAN级别的寻呼。
在本发明实施例中，第二确定模块20用于：确定转发所述非接入层消息的RAN节点或者发送N2接口消息的RAN节点，与保存的所述UE上下文中的RAN节点不同时，确定服务所述UE的RAN节点发生改变。
在本发明实施例中，第二确定模块20还用于：请求会话管理功能(SMF)去激活协议数据单元会话(PDU session)，所述请求用于请求所述SMF去激活用户面连接，以使所述SMF删除所述PDU session的用户面配置。
在本发明实施例中，在所述接收所述UE发送的非接入层消息或者无线接入网络RAN节点发送的N2接口的消息之后，所述装置还包括第三确定模块，用于：确定所述UE进入不允许区域或者禁止区域，通知服务所述用户面连接的协议数据单元会话(PDU session)对应的请求会话管理功能SMF，所述UE仅接收高优先级业务。
在本发明实施例中，若接收到所述UE的服务请求消息，所述装置还包括：请求模块，用于根据所述服务请求消息中指定的协议数据单元会话(PDU session)，请求会话管理功能(SMF)去激活所述PDU session，然后再激活所述PDU session。
在本发明实施例中用户设备UE和网络状态不匹配的工作原理的方法步骤与前述用户设备UE和网络状态不匹配的处理方法的原理相同，在此不再赘述。
基于与方法同样的发明构思，请参考图7，本发明还提供了一种用户设备UE和网络状态不匹配的处理装置，包括处理器30、存储器40、外部通信接口50；其中，外部通信接口50，用于在处理器30的控制下接收和发送数据；
处理器30，用于读取存储器40中的程序，执行下列过程：
在外部通信接口50接收所述UE发送的非接入层消息或者无线接入网络RAN节点发送的N2接口的消息时，确定所述UE在网络侧处于连接态；
确定服务所述UE的RAN节点发生改变，通知原RAN节点释放所述UE的上下文和存在的用户面连接。
其中，在图7中，总线架构可以包括任意数量的互联的总线和桥，具体由处理器30代表的一个或多个处理器和存储器40代表的存储器的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起，这些都是本领域所公知的，因此，本文不再对其进行进一步描述。总线接口提供接口。外部通信接口50可以是多个元件，提供用于在传输介质上与各种其他装置通信的单元。处理器30负责管理总线架构和通常的处理，存储器40可以存储处理器30在执行操作时所使用的数据。
本发明实施例的又一方面提供了一种计算机装置，在具体实施过程中，所述计算机装 置具体可以为网络侧设备，还可以是终端，包括存储器、处理器及存储在所述存储器上并可在所述处理器上运行的计算机程序，所述处理器执行所述计算机程序时实现如上所述各方面所述的方法。
本发明实施例的又一方面提供了一种计算机可读存储介质，其上存储有计算机程序，所述计算机程序被处理器执行时实现如上所述各方面所述的方法。
本发明实施例中的上述一个或多个技术方案，至少具有如下一种或多种技术效果：
在本发明实施例的技术方案中，通过在接收所述UE发送的非接入层消息或者无线接入网络RAN节点发送的N2接口的消息时，确定所述UE在网络侧处于连接态；确定服务所述UE的RAN节点发生改变，通知原RAN节点释放所述UE的上下文和存在的用户面连接。也就是说，当确定所述UE和当前服务UE的RAN节点的网络状态不匹配时，通知原RAN节点释放所述UE的上下文和存在的用户面连接，从而解决了空口资源浪费和丢包的技术问题，减少了寻呼开销和丢包。
本领域内的技术人员应明白，本发明的实施例可提供为方法、系统、或计算机程序产品。因此，本发明可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本发明可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器和光学存储器等)上实施的计算机程序产品的形式。
本发明是参照根据本发明实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个 方框或多个方框中指定的功能的步骤。
尽管已描述了本发明的优选实施例，但本领域内的技术人员一旦得知了基本创造性概念，则可对这些实施例作出另外的变更和修改。所以，所附权利要求意欲解释为包括优选实施例以及落入本发明范围的所有变更和修改。
显然，本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和范围。这样，倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内，则本发明也意图包含这些改动和变型在内。

Claims (22)

  1. 一种用户设备UE和网络状态不匹配的处理方法，应用于接入与移动性管理功能AMF，其特征在于，包括：
    在接收所述UE发送的非接入层消息或者无线接入网络RAN节点发送的N2接口的消息时，确定所述UE在网络侧处于连接态；
    确定服务所述UE的RAN节点发生改变，通知原RAN节点释放所述UE的上下文和存在的用户面连接。
  2. 如权利要求1所述的方法，其特征在于，所述接收所述UE发送的非接入层消息，包括：
    接收所述UE在空闲态发送的初始非接入层消息，其中，所述空闲态为所述UE从无线资源控制RRC非激活状态进入RRC空闲状态后非接入层进入的连接管理空闲态。
  3. 如权利要求2所述的方法，其特征在于，所述接收所述UE在空闲态发送的初始非接入层消息，包括：
    接收所述UE在所述空闲态下发送的注册更新请求消息；或，
    在所述UE在所述空闲态下发送上行数据时，接收所述UE的请求消息。
  4. 如权利要求1所述的方法，其特征在于，所述确定所述UE在网络侧处于连接态，包括：
    根据保存的所述UE的所述上下文，确定所述UE在网络侧处于连接状态。
  5. 如权利要求1所述的方法，其特征在于，所述通知原RAN节点释放所述UE的上下文和用户面连接，包括：
    通知原RAN节点释放所述UE的上下文；
    删除与核心网之间的用户面连接。
  6. 如权利要求5所述的方法，其特征在于，所述方法还包括：
    通知原RAN节点释放所述UE的上下文，使得原RAN节点停止RAN级别的寻呼。
  7. 如权利要求1所述的方法，其特征在于，所述确定服务所述UE的RAN节点发生改变，包括：
    确定转发所述非接入层消息的RAN节点或者发送N2接口消息的RAN节点，与保存的所述UE上下文中的RAN节点不同时，确定服务所述UE的RAN节点发生改变。
  8. 如权利要求1所述的方法，其特征在于，所述确定服务所述UE的RAN节点发生改变，通知原RAN节点释放所述UE的上下文和用户面连接，还包括：
    请求会话管理功能SMF去激活协议数据单元会话PDU session，所述请求用于请求所述SMF去激活用户面连接，以使所述SMF删除所述PDU session的用户面配置。
  9. 如权利要求1所述的方法，其特征在于，在所述接收所述UE发送的非接入层消息或者无线接入网络RAN节点发送的N2接口的消息之后，包括：
    确定所述UE进入不允许区域或者禁止区域，通知服务所述用户面连接所属的协议数据单元会话PDU session的请求会话管理功能SMF，所述UE仅高优先级业务可达。
  10. 如权利要求3所述的方法，其特征在于，若接收到所述UE的服务请求消息，所述方法还包括：
    根据所述服务请求消息中指定的协议数据单元会话PDU session，请求会话管理功能SMF去激活所述PDU session，然后再激活所述PDU session。
  11. 一种用户设备UE和网络状态不匹配的处理装置，其特征在于，包括：
    第一确定模块，用于在接收所述UE发送的非接入层消息或者无线接入网络RAN节点发送的N2接口的消息时，确定所述UE在网络侧处于连接态；
    第二确定模块，用于确定服务所述UE的RAN节点发生改变，通知原RAN节点释放所述UE的上下文和存在的用户面连接。
  12. 如权利要求11所述的装置，其特征在于，所述装置还包括接收模块，用于：
    接收所述UE在空闲态发送的初始非接入层消息，其中，所述空闲态为所述UE从无线资源控制RRC非激活状态进入RRC空闲状态后非接入层进入的连接管理空闲态。
  13. 如权利要求12所述的装置，其特征在于，所述接收模块用于：
    接收所述UE在所述空闲态下发送的注册更新请求消息；或，
    在所述UE在所述空闲态下发送上行数据时，接收所述UE的请求消息。
  14. 如权利要求11所述的装置，其特征在于，所述第一确定模块用于：
    根据保存的所述UE的所述上下文，确定所述UE在网络侧处于连接状态。
  15. 如权利要求11所述的装置，其特征在于，所述第二确定模块用于：
    通知原RAN节点释放所述UE的上下文；
    删除与核心网之间的用户面连接。
  16. 如权利要求15所述的装置，其特征在于，所述第二确定模块还用于：
    通知原RAN节点释放所述UE的上下文，使得原RAN节点停止RAN级别的寻呼。
  17. 如权利要求11所述的装置，其特征在于，所述第二确定模块用于：
    确定转发所述非接入层消息的RAN节点或者发送N2接口消息的RAN节点，与保存的所述UE上下文中的RAN节点不同时，确定服务所述UE的RAN节点发生改变。
  18. 如权利要求11所述的装置，其特征在于，所述第二确定模块还用于：
    请求会话管理功能SMF去激活协议数据单元会话PDU session，所述请求用于请求所述SMF去激活用户面连接，以使所述SMF删除所述PDU session的用户面配置。
  19. 如权利要求11所述的装置，其特征在于，在所述接收所述UE发送的非接入层消息或者无线接入网络RAN节点发送的N2接口的消息之后，所述装置还包括第三确定模块，用于：
    确定所述UE进入不允许区域或者禁止区域，通知服务所述用户面连接所属的协议数据单元会话PDU session的请求会话管理功能SMF，所述UE仅高优先级业务可达。
  20. 如权利要求13所述的装置，其特征在于，若接收到所述UE的服务请求消息，所述装置还包括：
    请求模块，用于根据所述服务请求消息中指定的协议数据单元会话PDU session，请求会话管理功能SMF去激活所述PDU session，然后再激活所述PDU session。
  21. 一种计算机装置，包括存储器、处理器及存储在所述存储器上并可在所述处理器上运行的计算机程序，其特征在于，所述处理器执行所述计算机程序时实现权利要求1至10任一权项所述方法的步骤。
  22. 一种计算机可读存储介质，其上存储有计算机程序，其特征在于，所述计算机程序被处理器执行时实现权利要求1至10任一权项所述方法的步骤。
PCT/CN2018/098683 2017-08-14 2018-08-03 一种ue和网络状态不匹配的处理方法及装置 Ceased WO2019033945A1 (zh)

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