WO2018121644A1 - Procédé de gestion de mobilité de réseau d'accès inter-radio, dispositif de réseau central et station de base - Google Patents

Procédé de gestion de mobilité de réseau d'accès inter-radio, dispositif de réseau central et station de base Download PDF

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Publication number
WO2018121644A1
WO2018121644A1 PCT/CN2017/119232 CN2017119232W WO2018121644A1 WO 2018121644 A1 WO2018121644 A1 WO 2018121644A1 CN 2017119232 W CN2017119232 W CN 2017119232W WO 2018121644 A1 WO2018121644 A1 WO 2018121644A1
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Prior art keywords
terminal
ran
base station
inactive state
context information
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PCT/CN2017/119232
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English (en)
Chinese (zh)
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梁靖
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电信科学技术研究院
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Publication of WO2018121644A1 publication Critical patent/WO2018121644A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/14—Reselecting a network or an air interface
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Definitions

  • the present disclosure relates to the field of mobile communications technologies, and in particular, to a mobility management method, a core network device, and a base station between wireless access networks.
  • New RAT new radio access technology
  • NR 5G new air interface
  • the terminal In the inactive state, the terminal maintains the core network connection, but does not perform the normal operation of the air interface connection state (such as handover, uplink timing update, radio link monitoring, etc.), and does not allocate the terminal identifier (such as C-RNTI) directly used for air interface transmission. Therefore, it is not possible to directly perform air interface scheduling transmission.
  • the terminal In the inactive state, the terminal needs to listen to the paging message to ensure that the call from the network side can be received.
  • Figure 1 is an interface in a network architecture of a NextGen network, where the gNB is a base station in a New RAT (NR) system.
  • NG2 represents a control plane interface of a radio access network (RAN, Radio Access Network) and a core network
  • NG3 represents a user plane interface of the RAN and the core network.
  • the NR base station gNB is connected to the user function function (UP functions) unit of the 5G core network (NGC, NextGen Core) through the user plane interface NG3, and is connected to the control function function (CP functions) unit of the NGC through the control plane interface NG2.
  • UP functions user function function
  • CP functions control function function
  • the RAN node In the inactive state of the terminal (UE), although the RAN node releases the Radio Resource Control (RRC) connection of the UE, it still retains the connection of the NG2 and NG3 interfaces of the UE.
  • RRC Radio Resource Control
  • the UE is transparent to the core network in this state, that is, the core network still considers that the UE is always in the connected state, so the downlink signaling or data will arrive at the RAN node, and the RAN needs to page the UE.
  • CN level core level
  • RAN level radio access network level
  • the CN level location area that is, the UE location area controlled by the core network, is generally called a Tracking Area (TA).
  • TA Tracking Area
  • the core network always configures a TA list (TAI list) for the UE through a non-access stratum (NAS, Non Access Stratum) message.
  • NAS Non Access Stratum
  • the UE stores the TAI List configured by the core network, and when a cell (the terminal is in an idle state) or an access (the terminal is in a connected state), the system message of the cell air interface broadcast is read, and the information is obtained from the TAI, if the TAI The UE does not store the TAI list, and the UE initiates a Tracking Area Update (TAU) process, and acquires a new TAI List by interacting with the NAS signaling of the core network.
  • TAU Tracking Area Update
  • the UE Before the inactive state is introduced, the UE has only the idle state and the connected state.
  • the location area of the UE in the idle state is the TA, and the location area in the connected state is the cell.
  • a RAN level location area that is, a RAN notification area (RNA, RAN Notification Area) is introduced for the UE.
  • the RNA can contain multiple cells.
  • the RAN network side node NR base station (gNB) may send a notification message to find the UE under multiple cells in the RNA area. After the UE moves out of an RNA, an RNA update is required so that the RAN network side node can find the UE.
  • TA and RNA are UE location areas maintained by the core network node and the RAN node, respectively, and their functions are to enable the core network node and the RAN node to perform location area tracking on the UE.
  • the core network searches for the UE by sending a paging message in all cells in the TAI list area of the UE; the UE is in an inactive state, and the RAN node gNB sends a notification in all cells under the RNA region. The notification looks for the UE.
  • inter-radio access technology (inter-RAT) network architecture of NR and eLTE/LTE is described below.
  • the NR base station gNB and the eLTE base station eLTE eNB are both connected to a 5G core network (NGC, NextGen Core). It can be seen that both the gNB and the eNB are connected to the NGC through a user plane (UP) interface and a control plane (CP) interface.
  • NGC 5G core network
  • UP user plane
  • CP control plane
  • the NR base station gNB is connected to the 5G core network NGC, and the LTE base station LTE eNB is connected to the 4G core network Evolved Packet Core (EPC).
  • EPC Evolved Packet Core
  • Both of the above architectures provided in Figures 2 and 3 are inter-RAT architectures.
  • an inactive terminal moves from the NR to the LTE/eLTE network, it is the mobile behavior performed under the above two network architectures. Since there is currently no relevant standardization content for this, the behavior of the UE is uncertain.
  • the related technology only defines the inactive state of the NR system.
  • the UE in the inactive state moves from the NR system to other communication systems (such as the LTE/eLTE system)
  • the terminal Since the other communication systems have no inactive state, the terminal The inactive state will not be maintained. At this time, the behavior of the terminal is uncertain and cannot work normally.
  • the embodiments of the present disclosure provide a mobility management method, a core network device, and a base station between the radio access networks, to implement mobility management after the UE in the inactive state enters the eLTE/LTE network from the NR network.
  • a method for managing mobility between radio access networks where the radio access network includes a first radio access network RAN and a second RAN, where the first RAN is a RAN of a new air interface NR system,
  • the method is characterized in that the method comprises:
  • the terminal in the inactive state detects that the terminal accesses from the first RAN to the second RAN;
  • the terminal switches its own state from the inactive state to the idle state, and continues to locally retain the user context information when the terminal is in an inactive state in the NR system.
  • the method further includes:
  • the terminal If the terminal detects that the terminal re-accesses the first RAN, it switches its state back to the inactive state, and restores the user context information when the terminal is in the inactive state in the NR system.
  • the second RAN is a RAN of the eLTE system
  • the method further includes:
  • the terminal sends the prompt information of the first base station that stores the user context information of the terminal in the inactive state in the NR system to the network side, where
  • the prompt information is a current terminal identifier of the terminal, or an inactive state terminal identifier associated with the user context information, or an identifier of the first base station;
  • the terminal After the uplink signaling process triggers the establishment of the RRC connection process, or after receiving the paging message sent by the network side after the end of the uplink signaling process, the terminal deletes the locally reserved terminal in the NR system. User context information when inactive.
  • the second RAN is a RAN of the eLTE system
  • the method further includes:
  • the terminal sends, to the network side, prompt information of the first base station that stores the user context information of the terminal in the inactive state in the NR system, where the prompt is sent.
  • the information is the current terminal identifier of the terminal, or an inactive state terminal identifier associated with the user context information, or an identifier of the first base station;
  • the terminal deletes the user context information when the terminal that is locally reserved is in an inactive state in the NR system.
  • the second RAN is a RAN of the LTE system
  • the method further includes:
  • the terminal deletes the user context information when the terminal that is locally reserved is in an inactive state in the NR system, and the terminal is saved in the NR system to be inactive.
  • the prompt information of the first base station of the user context information is sent to the network side, where the prompt information is the current terminal identifier of the terminal, or an inactive state terminal identifier associated with the user context information, or the first base station Logo.
  • the method further includes:
  • the terminal starts a timer pre-configured by the NR system
  • the terminal Before the timer expires, if the terminal detects that the terminal reconnects back to the first RAN, the timer is stopped, the state is switched back to the inactive state, and the terminal is restored to be in the NR system.
  • User context information when inactive if the terminal detects that the terminal reconnects back to the first RAN, the timer is stopped, the state is switched back to the inactive state, and the terminal is restored to be in the NR system.
  • the terminal After the timer expires, the terminal deletes the user context information when the terminal that is locally reserved is in an inactive state in the NR system.
  • the second RAN is a RAN of the eLTE system
  • the step of the terminal switching its own state from the inactive state to the idle state if the timer expires, the terminal is in the first
  • the uplink signaling process is initiated in the RAN, and the method further includes:
  • the terminal sends the prompt information of the first base station that stores the user context information of the terminal in the inactive state in the NR system to the network side, where
  • the prompt information is a current terminal identifier of the terminal, or an inactive state terminal identifier associated with the user context information, or an identifier of the first base station;
  • the terminal After the uplink signaling process triggers the establishment of the RRC connection process, or after receiving the paging message sent by the network side after the end of the uplink signaling process, the terminal deletes the locally reserved terminal in the NR system. User context information when inactive.
  • the second RAN is a RAN of the eLTE system, and after the step of the terminal switching its own state from the inactive state to the idle state, if the timer expires, the terminal is in the first
  • the second RAN initiates an uplink service process, where the method further includes:
  • the terminal sends, to the network side, prompt information of the first base station that stores the user context information of the terminal in the inactive state in the NR system, where the prompt is sent.
  • the information is the current terminal identifier of the terminal, or an inactive state terminal identifier associated with the user context information, or an identifier of the first base station;
  • the terminal deletes the user context information when the terminal that is locally reserved is in an inactive state in the NR system.
  • the second RAN is a RAN of the LTE system
  • the method further includes:
  • the terminal deletes the user context information when the locally reserved terminal is in an inactive state in the NR system, and the The prompt information of the first base station of the user context information when the terminal is in the inactive state in the NR system is sent to the network side, where the prompt information is the current terminal identifier of the terminal or inactive associated with the user context information. State terminal identifier, or the identity of the first base station.
  • the method further includes:
  • the terminal initiates a RAN level location area RNA update process for RNA update.
  • the embodiment of the present disclosure further provides a mobility management method between radio access networks, where the radio access network includes a first radio access network RAN and a second RAN, where the first RAN is a new air interface NR system.
  • RAN the second RAN is a RAN of an eLTE system, and the method includes:
  • the first core network of the NR system receives a paging failure message sent by the first base station in the first RAN when the RAN level location area RNA cannot be paged to the first terminal in the inactive state, the first
  • the base station is a base station that stores user context information of the first terminal in the NR system;
  • the first core network initiates paging to the first terminal in a location area TA at a core network level.
  • the prompt information is used to prompt the a second base station in the first RAN, where the second base station is a base station that stores user context information of the second terminal in the NR system;
  • the first core network continues to maintain the control plane interface NG2 connection of the second terminal in the NR system and the user plane interface GN3 according to the prompt information, and sends a second base station to notify the second base station. A notification message of the connection of the second terminal is continued.
  • the method further includes:
  • the first core network releases a connection between the second terminal and the eLTE system.
  • the method further includes:
  • the first core network When the downlink service of the second terminal arrives, the first core network directly performs paging in the second RAN of the eLTE system, and after receiving the paging response message of the second terminal, the second core network Transmitting, by the NR2, the NG2 connection and the GN3 connection in the NR system, transferring from the first base station to the corresponding base station in the second RAN, and transmitting, to the second base station, a connection for notifying the second base station to release the second terminal, and A notification message of user context information when the second terminal is in an inactive state in the NR system is deleted.
  • the method further includes:
  • the first core network connects the control plane interface NG2 connection of the third terminal in the NR system with the user plane interface GN3 according to the prompt information, transfers to the corresponding base station in the second RAN, and sends the signal to the third base station. a notification message for notifying the third base station to release the connection of the third terminal and deleting user context information when the third terminal is in an inactive state in the NR system.
  • the RRC connection establishment process is triggered when the third terminal initiates an uplink signaling process, or is triggered when an uplink service process is initiated.
  • the embodiment of the present disclosure further provides another mobility management method between radio access networks, where the radio access network includes a first radio access network RAN and a second RAN, where the first RAN is a new air interface NR system.
  • RAN the second RAN is a RAN of an LTE system, and the method includes:
  • the first core network of the NR system receives a prompt message sent by the terminal in the second RAN during the RRC connection establishment process, where the prompt information is used to prompt the first base station in the first RAN, the first
  • the base station is a base station that stores user context information of the terminal in the NR system;
  • the first core network sends, according to the prompt information, a notification to the first base station for notifying the first base station to release the connection of the terminal and deleting user context information when the terminal is in an inactive state in the NR system. Message.
  • the first core network further receives the prompt message forwarded by the EPC by using an interface with an EPC of the LTE system.
  • the embodiment of the present disclosure further provides a mobility management method between the radio access networks, where the radio access network includes a first radio access network RAN and a second RAN, where the first RAN is a new air interface NR system.
  • RAN the second RAN is a RAN of an eLTE system, and the method includes:
  • a first base station in the first RAN initiating paging of a first terminal in an inactive state within a location area RNA of a RAN level, the first base station preserving that the second terminal is in the NR system User context information when inactive;
  • the first RAN cannot page the first terminal in the RNA, send a paging failure message sent to the first core network of the NR system indicating that the first terminal cannot be paged in the RNA. .
  • the method includes:
  • the first base station starts a timer according to the notification message, and maintains the connection of the second terminal in the NR system before the timer expires, leaving the second terminal in an inactive state in the NR system.
  • Time user context information and, after the timer expires, releasing the connection of the second terminal and deleting user context information when the second terminal is in an inactive state in the NR system.
  • the method includes:
  • the first base station releases the connection of the second terminal according to the notification message and deletes user context information when the second terminal is in an inactive state in the NR system.
  • the embodiment of the present disclosure further provides a mobility management method between the radio access networks, where the radio access network includes a first radio access network RAN and a second RAN, where the first RAN is a new air interface NR system.
  • RAN the second RAN is a RAN of an LTE system, and the method includes:
  • the first base station of the NR system receives a connection sent by the first core network of the NR system to notify the first base station to release the terminal, and deletes the user when the terminal is in an inactive state in the NR system. Notification message of context information;
  • the first base station releases the connection of the terminal according to the notification message and deletes user context information when the terminal is in an inactive state in the NR system.
  • the embodiment of the present disclosure further provides a terminal, where the terminal includes:
  • the first detecting unit is configured to detect that the local terminal accesses the first RAN to the second RAN when the terminal is in an inactive state, where the first RAN is the RAN of the new air interface NR system;
  • a first switching unit configured to: the terminal switches its own state from the inactive state to an idle state, and continues to locally retain user context information when the terminal is in an inactive state in the NR system.
  • the above terminals also include:
  • a second detecting unit configured to detect that the terminal reconnects back to the first RAN
  • a second switching unit configured to: when the second detecting unit detects that the terminal reconnects back to the first RAN, switches the state to the inactive state, and restores the user that the terminal is in the inactive state in the NR system. Contextual information.
  • the second RAN is a RAN of an eLTE system, and the terminal further includes:
  • a first signaling initiation unit configured to initiate an uplink signaling process in the second RAN after the terminal state is switched from the inactive state to the idle state, and trigger an establishment of an RRC connection process in the uplink signaling process
  • the terminal sends the prompt information of the first base station that stores the user context information of the terminal in the inactive state in the NR system to the network side, where the prompt information is the current terminal identifier of the terminal, or An inactive state terminal identifier associated with the user context information, or an identifier of the first base station; and, in the process of triggering establishment of an RRC connection by the uplink signaling process, or receiving a network after the end of the uplink signaling process
  • the terminal deletes the user context information when the terminal that is locally reserved is in an inactive state in the NR system.
  • the second RAN is a RAN of an eLTE system, and the terminal further includes:
  • a first service initiating unit configured to initiate an uplink service process in the second RAN after the terminal state is switched from the inactive state to the idle state, and trigger the establishment of the RRC connection process in the uplink service process
  • the terminal sends the prompt information of the first base station that stores the user context information of the terminal in the inactive state in the NR system to the network side, where the prompt information is the current terminal identifier of the terminal, or The inactive state terminal identifier associated with the user context information, or the identifier of the first base station; and, in the process of triggering the establishment of the RRC connection by the uplink service procedure, the terminal deleting the locally reserved terminal is inactive in the NR system User context information.
  • the second RAN is a RAN of the LTE system, and the terminal further includes:
  • a first connection establishing unit configured to delete a user that is temporarily inactive in the NR system if the RRC connection establishment process is initiated after the terminal state is switched from the inactive state to the idle state
  • the context information, and the prompt information of the first base station that stores the user context information when the terminal is in the inactive state in the NR system is sent to the network side, where the prompt information is the current terminal identifier of the terminal, or An inactive state terminal identifier associated with the user context information, or an identity of the first base station.
  • the above terminals also include:
  • a timing processing unit configured to start a timer pre-configured by the NR system after switching the terminal state from the inactive state to the idle state; and if the terminal detects the current before the timer expires After the terminal re-accesses back to the first RAN, the timer is stopped, the state is switched back to the inactive state, and the user context information when the terminal is in the inactive state in the NR system is restored; the timer expires After that, the user context information when the terminal that is locally reserved is in an inactive state in the NR system is deleted.
  • the second RAN is a RAN of an eLTE system, and the terminal further includes:
  • a second signaling initiation unit configured to: after the step of switching the terminal state from the inactive state to the idle state, if the uplink signaling process is initiated in the second RAN before the timer expires,
  • the prompting information of the first base station that stores the user context information when the terminal is in the inactive state in the NR system is sent to the network side, where the prompt information is a current terminal identifier of the terminal, or an inactive state terminal identifier associated with the user context information, or an identifier of the first base station; and, in the process of triggering establishment of an RRC connection by the uplink signaling process, or in the uplink
  • the user context information when the terminal reserved in the NR system is in an inactive state is deleted.
  • the second RAN is a RAN of an eLTE system, and the terminal further includes:
  • a second service initiating unit configured to: after the terminal state is switched from the inactive state to the idle state, if an uplink service process is initiated in the second RAN before the timer expires, the uplink service process is performed.
  • the prompt information of the first base station that saves the user context information when the terminal is in the inactive state in the NR system is sent to the network side, where the prompt information is the current terminal identifier of the terminal. Or an inactive state terminal identifier associated with the user context information, or an identifier of the first base station; and, in the process of triggering the establishment of the RRC connection by the uplink service procedure, deleting the locally reserved terminal is in the NR system User context information when inactive.
  • the second RAN is a RAN of the LTE system, and the terminal further includes:
  • a second connection establishing unit configured to: after the timer state is switched from the inactive state to the idle state, if the RRC connection establishment process is initiated before the timer expires, deleting the locally reserved terminal in the NR system
  • the user context information in the inactive state, and the prompt information of the first base station that stores the user context information when the terminal is in the inactive state in the NR system is sent to the network side, where the prompt information is The current terminal identifier of the terminal, or an inactive state terminal identifier associated with the user context information, or an identifier of the first base station.
  • the terminal further includes:
  • an updating unit configured to initiate a RAN-level location area RNA update process to perform RNA update after switching the terminal state back to the inactive state.
  • the embodiment of the present disclosure further provides a first core network of a new air interface NR system, including:
  • a first receiving unit configured to receive, by the first base station in the first RAN, a paging failure message that is sent when the first terminal in the inactive state cannot be paged in the location area RNA of the RAN level, where the first base station is a base station storing the user context information of the first terminal in the NR system, where the first RAN is a RAN of the new air interface NR system;
  • the first paging unit is configured to initiate paging to the first terminal in a location area TA at a core network level.
  • the above first core network also includes:
  • a second receiving unit configured to receive a prompt information sent by the second terminal in the second RAN in the RRC connection establishment process triggered by the uplink signaling process, where the prompt information is used to prompt the second in the first RAN a base station, the second base station is a base station that stores user context information of the second terminal in the NR system, and the second RAN is a RAN of an eLTE system;
  • a first processing unit configured to continue to maintain the connection between the control plane interface NG2 and the user plane interface GN3 of the second terminal in the NR system according to the prompt information, and send a notification to the second base station to notify the The second base station continues to maintain the notification message of the connection of the second terminal.
  • the above first core network also includes:
  • connection release unit configured to release a connection between the second terminal and the eLTE system after the uplink signaling process of the second terminal ends.
  • the above first core network also includes:
  • a first paging unit configured to: after the connection release unit releases the connection between the second terminal and the eLTE system, if the downlink service of the second terminal arrives, directly in the second eLTE system Paging in the RAN, and after receiving the paging response message of the second terminal, connecting the NG2 connection and the GN3 connection of the second terminal in the NR system, and transferring from the first base station to the corresponding in the second RAN And the base station sends, to the second base station, a notification message for notifying the second base station to release the connection of the second terminal and deleting user context information when the second terminal is in an inactive state in the NR system.
  • the above first core network also includes:
  • a third receiving unit configured to receive a prompt message sent by the third terminal in the second RAN in the RRC connection setup process, where the prompt information is used to prompt the third base station in the first RAN
  • the third The base station is a base station that stores user context information of the third terminal in the NR system
  • the first core network further includes:
  • a second processing unit configured to connect, according to the prompt information, the control plane interface NG2 connection in the NR system with the user plane interface GN3, and transfer to the corresponding base station in the second RAN, and
  • the third base station sends a notification message for notifying the third base station to release the connection of the third terminal and deleting user context information when the third terminal is in an inactive state in the NR system.
  • the RRC connection establishment process of the first core network is triggered when the third terminal initiates the uplink signaling process, or is triggered when the uplink service process is initiated.
  • the embodiment of the present disclosure further provides a first core network of a new air interface NR system, including:
  • a first receiving unit configured to receive a prompt information that is sent by the terminal in the second RAN in the RRC connection setup process, where the prompt information is used to prompt the first base station in the first RAN, where the first base station is a base station storing user context information of the terminal in the NR system, where the second RAN is a RAN of an LTE system;
  • a first sending unit configured to send, to the first base station, a notification message for notifying the first base station to release the connection of the terminal and deleting user context information when the terminal is in an inactive state in the NR system.
  • the first receiving unit further receives the prompt message forwarded by the EPC by using an interface with an EPC of the LTE system.
  • the embodiment of the present disclosure further provides a first base station of a radio access network of a new air interface NR system, including:
  • a paging unit configured to initiate paging to a first terminal in an inactive state within a RAN level location area RNA in the first RAN, where the first base station saves the second terminal in the NR system User context information when inactive state, the first RAN is the RAN of the new air interface NR system;
  • a first sending unit configured to: if the first RAN fails to page to the first terminal in the RNA, send a message to the first core network of the NR system that the first terminal cannot be paged in the RNA A paging failure message sent.
  • the above first base station further includes:
  • a first receiving unit configured to receive, by the first core network, a notification message for notifying the first base station to continue to maintain the connection of the second terminal;
  • a first processing unit configured to start a timer according to the notification message, and maintain a connection of the second terminal in the NR system before the timer expires, leaving the second terminal in the NR system User context information when in an inactive state, and, after the timer expires, releasing the connection of the second terminal and deleting user context information when the second terminal is in an inactive state in the NR system.
  • the above first base station further includes:
  • a second receiving unit configured to receive, by the first core network, a user context for notifying the first base station to release the second terminal, and deleting a user context when the second terminal is in an inactive state in the NR system Notification message of information;
  • a second processing unit configured to release the connection of the second terminal according to the notification message, and delete user context information when the second terminal is in an inactive state in the NR system.
  • the embodiment of the present disclosure further provides a first base station of a radio access network of a new air interface NR system, including:
  • a receiving unit configured to receive, by the first core network of the NR system, a notification for notifying the first base station to release a connection of the terminal and deleting user context information when the terminal is in an inactive state in the NR system Message
  • a releasing unit configured to release the connection of the terminal according to the notification message and delete user context information when the terminal is in an inactive state in the NR system.
  • the mobility management method, the core network device, and the base station between the radio access networks provided by the embodiments of the present disclosure still retain the terminal in the NR when the terminal in the inactive state moves between different systems.
  • the user context information in the inactive state of the system is deleted until the user context information is satisfied.
  • the present disclosure can implement inter-RAT mobility management of terminals in an inactive state, solve mobility problems between different systems, and enable the terminal to work normally.
  • FIG. 1 is a schematic diagram of a network architecture of a related art NextGen network
  • FIG. 2 is a schematic diagram of an inter-RAT network architecture of a related art eLTE and NR;
  • FIG. 3 is a schematic diagram of an inter-RAT network architecture of LTE and NR according to related technologies
  • FIG. 4 is a schematic flowchart of a mobility management method applied to a terminal according to an embodiment of the present disclosure
  • FIG. 5 is a schematic flowchart of a mobility management method applied to an NR core network according to an embodiment of the present disclosure
  • FIG. 6 is another schematic flowchart of a mobility management method applied to an NR core network according to an embodiment of the present disclosure
  • FIG. 7 is still another schematic flowchart of a mobility management method applied to an NR core network according to an embodiment of the present disclosure
  • FIG. 8 is a schematic flowchart of a mobility management method applied to an NR base station according to an embodiment of the present disclosure
  • FIG. 9 is a schematic structural diagram of a terminal according to an embodiment of the present disclosure.
  • FIG. 10 is another schematic structural diagram of a terminal according to an embodiment of the present disclosure.
  • FIG. 11 is a schematic structural diagram of a core network of an NR system according to an embodiment of the present disclosure.
  • FIG. 12 is another schematic structural diagram of a core network of an NR system according to an embodiment of the present disclosure.
  • FIG. 13 is still another schematic structural diagram of a core network of an NR system according to an embodiment of the present disclosure.
  • FIG. 14 is still another schematic structural diagram of a core network of an NR system according to an embodiment of the present disclosure.
  • 15 is a schematic structural diagram of a base station of an NR system according to an embodiment of the present disclosure.
  • 16 is another schematic structural diagram of a base station of an NR system according to an embodiment of the present disclosure.
  • FIG. 17 is still another schematic structural diagram of a base station of an NR system according to an embodiment of the present disclosure.
  • FIG. 18 is still another schematic structural diagram of a base station of an NR system according to an embodiment of the present disclosure.
  • FIG. 19 is a schematic diagram of a scenario of Example 1 according to an embodiment of the present disclosure.
  • FIG. 20 is a schematic diagram of a scenario of Example 5 according to an embodiment of the present disclosure.
  • the embodiment of the present disclosure provides a mobility management method between RANs, which is applied between RANs based on different RATs.
  • the RAN includes a first RAN and a second RAN, where the first RAN is a new air interface NR.
  • the RAN of the system, the second RAN may be the RAN of the 3G system or the 4G system, or may be the RAN of the LTE system or the eLTE system.
  • the following embodiments of the present invention will be mainly described by taking an LTE system and an eLTE system as an example. It should be noted that the second RAN of the embodiment of the present disclosure is not limited to the RAN of the LTE system and the eLTE system.
  • the mobility management method provided by the embodiment of the present disclosure when applied to the terminal side, includes the following steps:
  • Step 41 The terminal in the inactive state detects that the local terminal accesses from the first RAN to the second RAN.
  • the first RAN is the RAN of the NR system
  • the terminal enters an inactive state in the first RAN, and the terminal may subsequently move and enter the second RAN based on different RATs.
  • the second RAN may be the RAN of the 3G/4G/LTE/eLTE system.
  • the terminal moves to and accesses the second RAN, it can determine that the first RAN has been left and the second RAN based on different RATs is accessed by reading a system message broadcasted by the cell air interface.
  • Step 42 The terminal switches its own state from the inactive state to an idle state, and continues to locally retain user context information when the terminal is in an inactive state in the NR system.
  • the terminal switches its state to the idle state (RRC-IDLE), and continues to reserve the terminal in the terminal locally at the NR.
  • User context information when the system is in an inactive state.
  • the foregoing context information may include one or more of the following information: a radio resource configuration parameter, a security parameter, a UE capability parameter, and the like.
  • the embodiment of the present disclosure defines the behavior of the terminal in the inactive state leaving the first RAN of the NR system and entering the second RAN based on different RATs, whereby the terminal can adopt the idle working under the second RAN. State, so that the terminal can work normally.
  • the terminal will retain the user context information when it is in the inactive state in the NR system, so as to quickly return to the inactive state when returning to the NR system. For example, when the terminal detects that the terminal re-accesses the first RAN, the terminal may switch its state back to the inactive state, and restore the user context information when the terminal is in the inactive state in the NR system.
  • the base station may change when the terminal re-accesses the first RAN, and is no longer the first base station when the first RAN is left. At this time, the terminal may also initiate the RAN level after switching its own state back to the inactive state.
  • the location region RNA update process performs RNA updates so that the RAN network side node can find the UE.
  • the terminal resides in the second RAN in an idle state.
  • Subsequent terminals may have different behaviors in the second RAN.
  • the terminal may initiate an uplink signaling process or an uplink service process.
  • the terminal may need to establish an RRC connection with the network. The behavior of the terminal of the embodiment of the present disclosure in the above process will be described below.
  • the terminal When the second RAN is the RAN of the eLTE system, after the foregoing step 42, the terminal camps in the second RAN in an idle state. If the terminal initiates an uplink signaling procedure in the second RAN, the uplink signaling is performed. During the process of triggering the establishment of the RRC connection, the terminal may send the prompt information of the first base station that stores the user context information of the terminal in the inactive state of the NR system to the network side, where the prompt information may be The current terminal identifier of the terminal, or an inactive state terminal identifier associated with the user context information, or an identifier of the first base station.
  • the prompt information is provided to the network side, and the network side may be configured to determine the first base station based on the prompt information, and notify the first base station to delete the context information of the terminal.
  • the eLTE base station eNB may directly send the prompt information sent by the user to the NGC, and the NGC notifies the first base station to delete the context information of the terminal.
  • the terminal may also delete the locally reserved terminal.
  • User context information in the NR system when it is in an inactive state.
  • the terminal When the second RAN is the RAN of the eLTE system, after the above step 42, the terminal resides in the second RAN in an idle state. If the terminal initiates an uplink service process in the second RAN, the terminal may save the user context information when the terminal is in an inactive state in the NR system during the process of triggering the establishment of the RRC connection by the uplink service process.
  • the prompt information of the first base station is sent to the network side, and the prompt information is a current terminal identifier of the terminal, or an inactive state terminal identifier associated with the user context information, or an identifier of the first base station.
  • the prompt information is provided to the network side, and the network side may be configured to determine the first base station based on the prompt information, and notify the first base station to delete the context information of the terminal.
  • the eLTE base station eNB may directly send the prompt information sent by the user to the NGC, and the NGC notifies the first base station to delete the context information of the terminal.
  • the terminal may also delete the user context information when the terminal that is locally reserved is in an inactive state in the NR system.
  • the terminal When the second RAN is the RAN of the LTE system, after the above step 42, the terminal resides in the second RAN in an idle state. If the terminal initiates an RRC connection setup process, the terminal deletes the user context information when the terminal that is locally reserved is in an inactive state in the NR system, and the terminal is saved in the NR system.
  • the prompt information of the first base station of the current user context information is sent to the network side, where the prompt information is the current terminal identifier of the terminal, or an inactive state terminal identifier associated with the user context information, or the first base station Logo.
  • the prompt information is provided to the network side, and the network side may be configured to determine the first base station based on the prompt information, and notify the first base station to delete the context information of the terminal.
  • the eNB of the LTE may send the prompt information sent by the user to the EPC, and the EPC forwards the information to the NGC, and then the NGC notifies the first base station to delete the context information of the terminal.
  • an effective time timer for user context information may be further set, and the timer is based on a predetermined timeout period, and after the timeout period is reached or exceeded, the terminal is triggered. And the network side deletes user context information when the terminal is in an inactive state in the NR system.
  • the terminal After the above step 42, after the step of the terminal switching its state from the inactive state to the idle state, the terminal starts a timer pre-configured by the NR system. Before the timer expires, if the terminal detects that the terminal reconnects back to the first RAN, the timer is stopped, the state is switched back to the inactive state, and the terminal is restored to be in the NR system. User context information when inactive. After the timer expires, the terminal deletes the user context information when the terminal that is locally reserved is in an inactive state in the NR system.
  • the terminal When the timer is started and camped in the second RAN in an idle state, the terminal may have different behavior in the second RAN before the timer expires. For example, the terminal may initiate an uplink signaling process or an uplink service process. In the foregoing process, the terminal may need to establish an RRC connection with the network.
  • the behavior of the terminal of the embodiment of the present disclosure in the above process will be described below.
  • the terminal When the second RAN is the RAN of the eLTE system, after the above step 42, the terminal camps in the second RAN in an idle state, and if the terminal initiates uplink signaling in the second RAN before the timer expires
  • the process in the process of triggering the establishment of the RRC connection by the uplink signaling process, the terminal sends the prompt information of the first base station that saves the user context information of the terminal in the inactive state in the NR system to the network side.
  • the prompt information is a current terminal identifier of the terminal, or an inactive state terminal identifier associated with the user context information, or an identifier of the first base station.
  • the prompt information is provided to the network side, and the network side may be configured to determine the first base station based on the prompt information, and notify the first base station to delete the context information of the terminal.
  • the eLTE base station eNB may directly send the prompt information sent by the user to the NGC, and the NGC notifies the first base station to delete the context information of the terminal.
  • the terminal deletes the local The user context information of the reserved terminal when it is in an inactive state in the NR system.
  • the terminal When the second RAN is the RAN of the eLTE system, after the foregoing step 42, the terminal camps in the second RAN in an idle state, and if the terminal initiates uplink in the second RAN before the timer expires In the process of the RRC connection, the terminal sends the prompt information of the first base station that stores the user context information of the terminal in the inactive state in the NR system to the network side.
  • the prompt information is a current terminal identifier of the terminal, or an inactive state terminal identifier associated with the user context information, or an identifier of the first base station.
  • the eLTE base station eNB may directly send the prompt information sent by the user to the NGC, and the NGC notifies the first base station to delete the context information of the terminal.
  • the terminal deletes the user context information when the terminal that is locally reserved is in an inactive state in the NR system.
  • the terminal When the second RAN is the RAN of the LTE system, after the foregoing step 42, the terminal camps in the second RAN in an idle state, and before the timer expires, if the terminal initiates an RRC connection establishment process, The terminal deletes the user context information when the terminal that is locally reserved is in an inactive state in the NR system, and the prompt of the first base station that stores the user context information when the terminal is in an inactive state in the NR system.
  • the information is sent to the network side, where the prompt information is the current terminal identifier of the terminal, or an inactive state terminal identifier associated with the user context information, or an identifier of the first base station.
  • the eNB of the LTE may send the prompt information sent by the user to the EPC, and the EPC forwards the information to the NGC, and then the NGC notifies the first base station to delete the context information of the terminal.
  • the mobility management method in which the terminal in the inactive state enters other RANs is described above.
  • the mobility management method described above will be further explained from the core network side of the NR system.
  • the core network behavior on the NR side will be described below with respect to the application scenario shown in FIG. 2.
  • a mobility management method between radio access networks RAN where the RAN includes a first RAN and a second RAN.
  • the first RAN is the RAN of the NR system
  • the second RAN is the RAN of the eLTE.
  • the mobility management method is applied to the first core network side of the NR system, and includes the following steps:
  • Step 51 The first core network of the NR system receives a paging failure message sent by the first base station in the first RAN when the RAN level location area RNA cannot be paged to the first terminal in the inactive state.
  • the first base station is a base station that stores user context information of the first terminal in the NR system.
  • Step 52 The first core network initiates paging to the first terminal in a location area TA at a core network level.
  • the first base station that stores the user context information of the first terminal in the NR system is in all the cells in the RNA area of the first terminal. Send a notification message (notification) to find the UE. If the paging fails, it indicates that the first terminal may leave the first RAN, then in step 52, the first core network further initiates paging to the first terminal in the location area TA of the core network level.
  • paging of the first terminal may be performed after the first terminal in the inactive state leaves the first RAN.
  • the terminal in the inactive state may leave the first RAN and access the second RAN, and the second terminal may initiate an uplink signaling process, where During the RRC connection establishment process triggered by the uplink signaling process, the second terminal may send prompt information to the network side to indicate that the network side stores the base station of the user context information of the terminal in the NR system.
  • the terminal in the inactive state may leave the first RAN and access the second RAN, and the second terminal may initiate an uplink signaling process, where During the RRC connection establishment process triggered by the uplink signaling process, the second terminal may send prompt information to the network side to indicate that the network side stores the base station of the user context information of the terminal in the NR system.
  • the first core network of the NR system in the embodiment of the present disclosure may further receive the prompt information sent by the second terminal in the second RAN in the RRC connection establishment process triggered by the uplink signaling process, where the prompt information is used for prompting a second base station in the first RAN, where the second base station is a base station that stores user context information of the second terminal in the NR system.
  • the first core network can learn that the second terminal has left the first RAN and enters the second RAN. At this time, the first core network continues to maintain the second terminal in the NR system according to the prompt information.
  • the control plane interface NG2 connection is connected to the user plane interface GN3, and a notification message for notifying the second base station to continue to maintain the connection of the second terminal is sent to the second base station.
  • the first core network may release a connection between the second terminal and the eLTE system.
  • the first core network may directly page in the second RAN of the eLTE system, and after receiving the paging response message of the second terminal,
  • the second terminal is in the NR system, the NG2 connection and the GN3 connection are transferred from the first base station to the corresponding base station (Pathswitch) in the second RAN, and a second base station is sent to notify the second base station to release the A connection of the second terminal and a notification message for deleting user context information when the second terminal is in an inactive state in the NR system.
  • the first core network in the uplink signaling process initiated by the second terminal, receives the prompt information, and learns that the second terminal has left the first RAN and enters the second RAN, at this time, the first core network can directly switch the interface path (Pathswitch) of the second terminal, and does not need to wait for the downlink service of the second terminal to arrive, that is, after the first core network receives the prompt information, And connecting the NG2 connection and the GN3 connection in the NR system, transferring from the first base station to a corresponding base station (Pathswitch) in the second RAN, and sending a second base station to notify the second base station And releasing a connection message of the second terminal and deleting a notification message of user context information when the second terminal is in an inactive state in the NR system.
  • the interface path Pathswitch
  • the terminal in the inactive state may leave the first RAN and access the second RAN, and the third terminal may initiate an uplink service process.
  • the third terminal may send prompt information to the network side to indicate that the network side stores the base station of the user context information of the terminal in the NR system.
  • the first core network of the NR system in the embodiment of the present disclosure may further receive a prompt message sent by the third terminal in the second RAN during the RRC connection establishment process, where the prompt information is used to prompt the first
  • the third base station in the RAN is a base station that stores user context information of the third terminal in the NR system.
  • the RRC connection establishment process is triggered when the third terminal initiates an uplink signaling process, or is triggered when an uplink service process is initiated.
  • the first core network may connect the control plane interface NG2 connection of the third terminal in the NR system with the user plane interface GN3, and transfer to the corresponding base station in the second RAN, and
  • the third base station sends a notification message for notifying the third base station to release the connection of the third terminal and deleting user context information when the third terminal is in an inactive state in the NR system.
  • a mobility management method between radio access networks RAN where the RAN includes a first RAN and a second RAN.
  • the first RAN is the RAN of the NR system
  • the second RAN is the RAN of the LTE.
  • the mobility management method is applied to the first core network side of the NR system, and includes the following steps:
  • Step 61 The first core network of the NR system receives a prompt message sent by the terminal in the second RAN in the RRC connection establishment process, where the prompt information is used to prompt the first base station in the first RAN.
  • the first base station is a base station that stores user context information of the terminal in the NR system.
  • the RRC connection establishment process may be triggered when the first terminal initiates the uplink signaling process, or triggered when the uplink service process is initiated, or may be triggered by the network side to discover the downlink signaling/service process.
  • the first core network may receive the prompt message forwarded by the EPC by using an interface with an EPC of the LTE system.
  • Step 62 The first core network sends, according to the prompt information, a first user base to notify the first base station to release the connection of the terminal, and delete the user context when the terminal is in an inactive state in the NR system. Notification message for information.
  • the first core network after receiving the prompt message forwarded by the EPC of the LTE system, may instruct the first base station to release the connection of the terminal and delete the user context information of the first terminal, thereby implementing inactive
  • the terminal of the state enters the mobility management after the RAN of the LTE.
  • a mobility management method between radio access networks RAN where the RAN includes a first RAN and a second RAN.
  • the first RAN is the RAN of the NR system
  • the second RAN is the RAN of the eLTE.
  • the mobility management method is applied to the first RAN side of the NR system, and includes the following steps:
  • Step 71 The first base station in the first RAN initiates paging to the first terminal in the inactive state in the location area RNA of the RAN level, where the first base station saves the first terminal in the NR User context information when the system is in an inactive state.
  • Step 72 If the first RAN cannot page the first terminal in the RNA, send a message to the first core network of the NR system that indicates that the first terminal cannot be paged in the RNA. Call the failure message.
  • the first RAN fails to page to the first terminal in the RNA, indicating that the first terminal may leave the first RAN.
  • the first base station sends a paging failure message to the core network, so that the core network can page the first terminal in the TA, and implement mobility management of the inactive terminal after entering the RAN of the e.LTE.
  • the first base station receives a notification message sent by the first core network to notify the first base station to continue to maintain the connection of the second terminal.
  • the first base station starts a timer according to the notification message, and maintains the connection of the second terminal in the NR system before the timer expires, leaving the second terminal in an inactive state in the NR system.
  • Time user context information and, after the timer expires, releasing the connection of the second terminal and deleting user context information when the second terminal is in an inactive state in the NR system.
  • a mobility management method between radio access networks RAN where the RAN includes a first RAN and a second RAN.
  • the first RAN is the RAN of the NR system
  • the second RAN is the RAN of the LTE.
  • the mobility management method is applied to the first RAN side of the NR system, and includes the following steps:
  • Step 81 The first base station of the NR system receives a connection sent by the first core network of the NR system to notify the first base station to release the terminal, and deletes the terminal in an inactive state in the NR system. Notification message for user context information.
  • Step 82 The first base station releases the connection of the terminal according to the notification message, and deletes user context information when the terminal is in an inactive state in the NR system.
  • the first base station directly releases the connection of the terminal and deletes the user context information when the terminal is in an inactive state in the NR system according to the notification message, so that the inactive terminal enters the RAN of the LTE. Mobility management.
  • some embodiments of the present disclosure provide a terminal that implements the above method.
  • the embodiment provides a terminal, including:
  • the first detecting unit 91 is configured to detect that the local terminal accesses from the first RAN to the second RAN when the terminal is in an inactive state, where the first RAN is the RAN of the new air interface NR system;
  • the first switching unit 92 is configured to switch the state of the terminal from the inactive state to the idle state, and continue to locally retain the user context information when the terminal is in an inactive state in the NR system.
  • the terminal may further include:
  • a second detecting unit configured to detect that the terminal reconnects back to the first RAN
  • a second switching unit configured to: when the second detecting unit detects that the terminal reconnects back to the first RAN, switches the state to the inactive state, and restores the user that the terminal is in the inactive state in the NR system. Contextual information.
  • the second RAN is a RAN of an eLTE system
  • the terminal further includes:
  • a first signaling initiation unit configured to initiate an uplink signaling process in the second RAN after the terminal state is switched from the inactive state to the idle state, and trigger an establishment of an RRC connection process in the uplink signaling process
  • the terminal sends the prompt information of the first base station that stores the user context information of the terminal in the inactive state in the NR system to the network side, where the prompt information is the current terminal identifier of the terminal, or An inactive state terminal identifier associated with the user context information, or an identifier of the first base station; and, in the process of triggering establishment of an RRC connection by the uplink signaling process, or receiving a network after the end of the uplink signaling process
  • the terminal deletes the user context information when the terminal that is locally reserved is in an inactive state in the NR system.
  • the second RAN is a RAN of an eLTE system
  • the terminal further includes:
  • a first service initiating unit configured to initiate an uplink service process in the second RAN after the terminal state is switched from the inactive state to the idle state, and trigger the establishment of the RRC connection process in the uplink service process
  • the terminal sends the prompt information of the first base station that stores the user context information of the terminal in the inactive state in the NR system to the network side, where the prompt information is the current terminal identifier of the terminal, or The inactive state terminal identifier associated with the user context information, or the identifier of the first base station; and, in the process of triggering the establishment of the RRC connection by the uplink service procedure, the terminal deleting the locally reserved terminal is inactive in the NR system User context information.
  • the second RAN is a RAN of an LTE system
  • the terminal further includes:
  • a first connection establishing unit configured to delete a user that is temporarily inactive in the NR system if the RRC connection establishment process is initiated after the terminal state is switched from the inactive state to the idle state
  • the context information, and the prompt information of the first base station that stores the user context information when the terminal is in the inactive state in the NR system is sent to the network side, where the prompt information is the current terminal identifier of the terminal, or An inactive state terminal identifier associated with the user context information, or an identity of the first base station.
  • the terminal further includes:
  • a timing processing unit configured to start a timer pre-configured by the NR system after switching the terminal state from the inactive state to the idle state; and if the terminal detects the current before the timer expires After the terminal re-accesses back to the first RAN, the timer is stopped, the state is switched back to the inactive state, and the user context information when the terminal is in the inactive state in the NR system is restored; the timer expires After that, the user context information when the terminal that is locally reserved is in an inactive state in the NR system is deleted.
  • the second RAN is a RAN of an eLTE system
  • the terminal further includes:
  • a second signaling initiation unit configured to: after the step of switching the terminal state from the inactive state to the idle state, if the uplink signaling process is initiated in the second RAN before the timer expires,
  • the prompting information of the first base station that stores the user context information when the terminal is in the inactive state in the NR system is sent to the network side, where the prompt information is a current terminal identifier of the terminal, or an inactive state terminal identifier associated with the user context information, or an identifier of the first base station; and, in the process of triggering establishment of an RRC connection by the uplink signaling process, or in the uplink
  • the user context information when the terminal reserved in the NR system is in an inactive state is deleted.
  • the second RAN is a RAN of an eLTE system
  • the terminal further includes:
  • a second service initiating unit configured to: after the terminal state is switched from the inactive state to the idle state, if an uplink service process is initiated in the second RAN before the timer expires, the uplink service process is performed.
  • the prompt information of the first base station that saves the user context information when the terminal is in the inactive state in the NR system is sent to the network side, where the prompt information is the current terminal identifier of the terminal. Or an inactive state terminal identifier associated with the user context information, or an identifier of the first base station; and, in the process of triggering the establishment of the RRC connection by the uplink service procedure, deleting the locally reserved terminal is in the NR system User context information when inactive.
  • the second RAN is a RAN of an LTE system
  • the terminal further includes:
  • a second connection establishing unit configured to: after the timer state is switched from the inactive state to the idle state, if the RRC connection establishment process is initiated before the timer expires, deleting the locally reserved terminal in the NR system
  • the user context information in the inactive state, and the prompt information of the first base station that stores the user context information when the terminal is in the inactive state in the NR system is sent to the network side, where the prompt information is The current terminal identifier of the terminal, or an inactive state terminal identifier associated with the user context information, or an identifier of the first base station.
  • the terminal further includes:
  • an updating unit configured to initiate a RAN-level location area RNA update process to perform RNA update after switching the terminal state back to the inactive state.
  • this embodiment provides another terminal, including: a processor 101; a memory 103 connected to the processor 101 through a bus interface, and a transceiver 102 connected to the processor 101 through a bus interface.
  • the memory is for storing programs and data used by the processor when performing operations; transmitting control commands and the like through the transceiver 102; when the processor calls and executes programs and data stored in the memory , do the following:
  • the terminal When the terminal is in an inactive state, detecting that the terminal is accessing from the first RAN to the second RAN, where the first RAN is the RAN of the new air interface NR system;
  • the terminal switches its own state from the inactive state to the idle state, and continues to locally retain user context information when the terminal is in an inactive state in the NR system.
  • the bus architecture may include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 101 and various circuits of memory represented by memory 103.
  • 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.
  • Transceiver 102 can be a plurality of components, including a transmitter and a transceiver, providing means for communicating with various other devices on a transmission medium.
  • the processor 101 is responsible for managing the bus architecture and general processing, and the memory 103 can store data used by the processor 101 in performing operations.
  • the processor 101 is responsible for managing the bus architecture and general processing, and the memory 103 can store data used by the processor 101 in performing operations.
  • some embodiments of the present disclosure provide a core network device of an NR system implementing the above method.
  • the embodiment provides a first core network of a new air interface NR system, including:
  • the first receiving unit 111 is configured to receive, by the first base station in the first RAN, a paging failure message that is sent when the first terminal in the inactive state is unable to be paged in the RAN level location area RNA, where the first base station sends
  • the first RAN is the RAN of the new air interface NR system.
  • the first paging unit 112 is configured to initiate paging to the first terminal in a location area TA at a core network level.
  • the first core network further includes:
  • a second receiving unit configured to receive a prompt information sent by the second terminal in the second RAN in the RRC connection establishment process triggered by the uplink signaling process, where the prompt information is used to prompt the second in the first RAN a base station, the second base station is a base station that stores user context information of the second terminal in the NR system, and the second RAN is a RAN of an eLTE system;
  • a first processing unit configured to continue to maintain the connection between the control plane interface NG2 and the user plane interface GN3 of the second terminal in the NR system according to the prompt information, and send a notification to the second base station to notify the The second base station continues to maintain the notification message of the connection of the second terminal.
  • the first core network further includes:
  • connection release unit configured to release a connection between the second terminal and the eLTE system after the uplink signaling process of the second terminal ends.
  • the first core network further includes:
  • a first paging unit configured to: after the connection release unit releases the connection between the second terminal and the eLTE system, if the downlink service of the second terminal arrives, directly in the second eLTE system Paging in the RAN, and after receiving the paging response message of the second terminal, connecting the NG2 connection and the GN3 connection of the second terminal in the NR system, and transferring from the first base station to the corresponding in the second RAN And the base station sends, to the second base station, a notification message for notifying the second base station to release the connection of the second terminal and deleting user context information when the second terminal is in an inactive state in the NR system.
  • the first core network further includes:
  • a third receiving unit configured to receive a prompt message sent by the third terminal in the second RAN in the RRC connection setup process, where the prompt information is used to prompt the third base station in the first RAN
  • the third The base station is a base station that stores user context information of the third terminal in the NR system
  • the first core network further includes:
  • a second processing unit configured to connect, according to the prompt information, the control plane interface NG2 connection in the NR system with the user plane interface GN3, and transfer to the corresponding base station in the second RAN, and
  • the third base station sends a notification message for notifying the third base station to release the connection of the third terminal and deleting user context information when the third terminal is in an inactive state in the NR system.
  • the RRC connection establishment process is triggered when the third terminal initiates an uplink signaling process, or is triggered when an uplink service process is initiated.
  • this embodiment provides another implementation of the first core network of the new air interface NR system, including: a processor 121; a memory 123 connected to the processor 121 through a bus interface, and a bus interface a transceiver 122 coupled to the processor 121; the memory for storing programs and data used by the processor in performing operations; transmitting control commands and the like through the transceiver 122;
  • a processor 121 a memory 123 connected to the processor 121 through a bus interface, and a bus interface a transceiver 122 coupled to the processor 121; the memory for storing programs and data used by the processor in performing operations; transmitting control commands and the like through the transceiver 122;
  • the first base station receives, by the first base station in the first RAN, a paging failure message sent when the first terminal in the inactive state cannot be paged in the location area RNA of the RAN level, where the first base station saves the first terminal
  • the base station of the user context information in the NR system, the first RAN is the RAN of the new air interface NR system.
  • the paging is initiated to the first terminal in a location area TA at the core network level.
  • the bus architecture may include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 121 and various circuits of memory represented by memory 123.
  • 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.
  • Transceiver 122 can be a plurality of components, including a transmitter and a transceiver, providing means for communicating with various other devices on a transmission medium.
  • the processor 121 is responsible for managing the bus architecture and general processing, and the memory 123 can store data used by the processor 121 when performing operations.
  • the processor 121 is responsible for managing the bus architecture and general processing, and the memory 123 can store data used by the processor 121 when performing operations.
  • this embodiment provides a first core network of another new air interface NR system, including:
  • the first receiving unit 131 is configured to receive a prompt information that is sent by the terminal in the second RAN during the RRC connection establishment process, where the prompt information is used to prompt the first base station in the first RAN, where the first base station is saved.
  • a base station having user context information of the terminal in the NR system the first RAN is a RAN of an NR system, and the second RAN is a RAN of an LTE system.
  • the first sending unit 132 is configured to send, to the first base station, a notification message for notifying the first base station to release the connection of the terminal and deleting user context information when the terminal is in an inactive state in the NR system.
  • the first receiving unit 131 further receives the prompt message forwarded by the EPC by using an interface with an EPC of the LTE system.
  • this embodiment provides another implementation of the first core network of the new air interface NR system, including: a processor 141; a memory 143 connected to the processor 141 through a bus interface, and a bus interface a transceiver 142 coupled to the processor 141; the memory for storing programs and data used by the processor in performing operations; transmitting control commands and the like through the transceiver 142;
  • a processor 141 a memory 143 connected to the processor 141 through a bus interface, and a bus interface a transceiver 142 coupled to the processor 141; the memory for storing programs and data used by the processor in performing operations; transmitting control commands and the like through the transceiver 142;
  • a prompt information that is sent by the terminal in the RRC connection establishment process, where the prompt information is used to prompt the first base station in the first RAN, where the first base station is in the A base station that describes user context information in an NR system, the second RAN being a RAN of an LTE system.
  • the bus architecture may include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 141 and various circuits of memory represented by memory 143.
  • 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.
  • Transceiver 142 may be a plurality of components, including a transmitter and a transceiver, providing means for communicating with various other devices on a transmission medium.
  • the processor 141 is responsible for managing the bus architecture and general processing, and the memory 143 can store data used by the processor 141 in performing operations.
  • the processor 141 is responsible for managing the bus architecture and general processing, and the memory 143 can store data used by the processor 141 in performing operations.
  • some embodiments of the present disclosure provide a base station of an NR system implementing the above method.
  • the embodiment provides a first base station of a new air interface NR system, including:
  • a paging unit 151 configured to initiate paging of a first terminal in an inactive state in a location area RNA of a RAN level in the first RAN, where the first base station saves the first terminal in the NR User context information when the system is in an inactive state, the first RAN is the RAN of the new air interface NR system.
  • the first sending unit 152 is configured to: if the first RAN fails to page to the first terminal in the RNA, send a message to the first core network of the NR system that the first page cannot be paged in the RNA Paging failure message sent by the terminal.
  • the first base station further includes:
  • a first receiving unit configured to receive, by the first core network, a notification message for notifying the first base station to continue to maintain the connection of the second terminal;
  • a first processing unit configured to start a timer according to the notification message, and maintain a connection of the second terminal in the NR system before the timer expires, leaving the second terminal in the NR system User context information when in an inactive state, and, after the timer expires, releasing the connection of the second terminal and deleting user context information when the second terminal is in an inactive state in the NR system.
  • the first base station further includes:
  • a second receiving unit configured to receive, by the first core network, a user context for notifying the first base station to release the second terminal, and deleting a user context when the second terminal is in an inactive state in the NR system Notification message of information;
  • a second processing unit configured to release the connection of the second terminal according to the notification message, and delete user context information when the second terminal is in an inactive state in the NR system.
  • this embodiment provides another implementation of the first base station of the new air interface NR system, including: a processor 161; a memory 163 connected to the processor 161 through a bus interface, and a bus interface a transceiver 162 to which the processor 161 is coupled; the memory for storing programs and data used by the processor when performing operations; transmitting control commands and the like by the transceiver 162; when the processor calls and executes the When programs and data are stored in memory, do the following:
  • the first base station Initiating paging of a first terminal in an inactive state within a RAN level location area RNA within the first RAN, the first base station retaining the second terminal in an inactive state in the NR system User context information, the first RAN is the RAN of the new air interface NR system.
  • the first RAN cannot page the first terminal in the RNA, send a paging failure message sent to the first core network of the NR system indicating that the first terminal cannot be paged in the RNA. .
  • the bus architecture may include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 161 and various circuits of memory represented by memory 163.
  • 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.
  • Transceiver 162 can be a plurality of components, including a transmitter and a transceiver, providing means for communicating with various other devices on a transmission medium.
  • the processor 161 is responsible for managing the bus architecture and general processing, and the memory 163 can store data used by the processor 161 in performing operations.
  • the processor 161 is responsible for managing the bus architecture and general processing, and the memory 163 can store data used by the processor 151 in performing operations.
  • a first base station of another new air interface NR system includes:
  • the receiving unit 171 is configured to receive, by the first core network of the NR system, a connection for notifying the first base station to release the terminal, and deleting user context information when the terminal is in an inactive state in the NR system. Notification message
  • the releasing unit 172 is configured to release the connection of the terminal according to the notification message and delete user context information when the terminal is in an inactive state in the NR system.
  • FIG. 18 still another implementation of a first base station of another new air interface NR system according to an embodiment of the present disclosure includes: a processor 181; a memory 183 connected to the processor 181 through a bus interface, and a bus through the bus a transceiver 182 having an interface coupled to the processor 181; the memory for storing programs and data used by the processor when performing operations; transmitting control commands by the transceiver 182, etc.; when the processor calls and executes When the program and data stored in the memory are executed, the following operations are performed:
  • the bus architecture may include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 181 and various circuits of memory represented by memory 183.
  • 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.
  • Transceiver 182 can be a plurality of components, including a transmitter and a transceiver, providing means for communicating with various other devices on a transmission medium.
  • the processor 181 is responsible for managing the bus architecture and normal processing, and the memory 183 can store data used by the processor 181 in performing operations.
  • the processor 181 is responsible for managing the bus architecture and general processing, and the memory 183 can store data used by the processor 181 in performing operations.
  • the scenario of the example 1 is that the terminal (UE) in the inactive state enters the RAN of the eLTE network from the RAN of the NR, and the UE initiates uplink signaling on the eLTE network.
  • the network architecture of the example 1 is as shown in FIG. 2 in the prior art.
  • the specific scenario is as shown in FIG. 19, the UE enters an inactive state when the NR, and both the gNB and the UE side reserve a set when the UE is in an inactive state in the NR system.
  • User context information (NR UE context).
  • the gNB can configure the UE with a valid time timer of the NR UE context. Thereafter, the UE enters the eLTE network from the NR network. Once the UE enters eLTE, the timer is started. If the gNB does not configure the timer or configure the timer to be infinite, the UE keeps the NR UE context.
  • the UE After the UE enters the eLTE network, it enters the idle state, still retains the NR UE context, and starts a valid timer (if any). If the UE returns to NR before the valid timer (if any) times out, the inactive state is directly restored and the NR UE context is restored. Optionally, the UE performs an RNA update on the NR. After the timer expires, the UE deletes the NR UE context.
  • the UE initiates a TAU procedure, which triggers an RRC connection setup procedure.
  • the UE adds the current UE identifier (such as S-TMSI) or the inactive UE ID associated with the NRUE context or The gNB identifier that holds the NR UE context is notified to the network, so that the NGC knows that the UE has entered the eLTE network.
  • the current UE identifier such as S-TMSI
  • the gNB identifier that holds the NR UE context is notified to the network, so that the NGC knows that the UE has entered the eLTE network.
  • the NGC can continue to maintain the connection between the gNB and the NGC, and notify the gNB to remain connected (the NGC finds the gNB based on the UE identity, or the inactive UE ID, or the gNB identifier that holds the NR UE context).
  • the NR base station starts a valid time timer of the NR UE context, maintains the NRUE context during the timer operation, and deletes the NR UE context after the timer expires.
  • the NGC releases the UE's connection at eLTE.
  • the NGC If the downlink service is to be sent to the UE, and the NGC knows that the UE does not return to the NR, the NGC directly pages in the eLTE, and after the UE responds to the paging, the NG2 and NG3 interfaces of the UE are transferred from the gNB to the eLTE.
  • the base station (such as establishing an associated interface in eLTE, and notifying the gNB to release the previous interface and deleting the NR UE context).
  • the UE stops the NR UE context timer (if any) and deletes the NR UE context.
  • the NGC After the NGC learns that the UE has entered the eLTE network, the NGC directly transfers the NG2 and NG3 interfaces of the UE from the gNB to the eLTE base station (for example, establishing an interface on eLTE, and notifying the gNB to release the previous interface and the NR UE. Context).
  • the UE initiates the RRC connection establishment, the NR UE context timer (if any) is stopped, and the NR UE context is deleted.
  • the scenario of the example 2 is that the inactive state UE enters the RAN of the eLTE network from the RAN of the NR, and the UE initiates an uplink service on the eLTE network.
  • Example 2 The network architecture and specific scenarios of Example 2 are the same as those of Example 1.
  • the UE enters an inactive state at the NR, and both the gNB and the UE side maintain a set of NR UE contexts.
  • the gNB can configure the UE with a valid time timer of the NR UE context, and once the UE enters the eLTE, the timer is started. If the gNB does not configure the timer or configure the timer to be infinite, the UE keeps the NR UE context.
  • the UE in the inactive state After entering the eLTE network from the NR network, the UE in the inactive state enters the idle state, still retains the UE context of the NR, and starts a valid timer (if any). If the UE returns to NR before the valid timer (if any) times out, the inactive state is directly restored, and the NR UE context is restored. Alternatively, the UE performs an RNA update at the NR. After the timer expires, the UE deletes the NR UE context.
  • the UE initiates an uplink data transmission process, triggering an RRC connection setup procedure, the eLTE base station accepts the RRC connection setup request of the UE, and establishes a connection with the NGC, and then the NGC NG2 of the UE
  • the NG3 interface is transferred from the gNB to the eLTE base station.
  • the UE initiates an RRC connection setup, it stops the NRUE context timer (if any) and deletes the NR UE context.
  • the scenario of example 3 is: the inactive state UE enters the eLTE network RAN from the RAN of the NR, and the network initiates downlink signaling or downlink service.
  • Example 3 The network architecture and specific scenarios of Example 3 are the same as those of Example 1.
  • the UE enters an inactive state at the NR, and both the gNB and the UE side maintain a set of NR UE contexts.
  • the gNB can configure the UE with a valid time timer of the NR UE context, and once the UE enters eLTE, the timer is started. If the gNB does not configure the timer or configure the timer to be infinite, the UE keeps the NR UE context.
  • the UE in the inactive state enters the eLTE network from the NR network. After the UE enters the eLTE network, it enters the idle state, still retains the UE context of the NR, and starts a valid timer (if any). If the UE returns to NR before the valid timer (if any) times out, the inactive state is directly restored, and the NR UE context is restored. Alternatively, the UE performs an RNA update at the NR. After the timer expires, the UE deletes the NR UE context.
  • the UE does not initiate any uplink transmission on the eLTE network, and the NGC still considers the UE to be in the NR network.
  • the gNB is triggered.
  • the gNB On the RAN side, when the gNB cannot page to the UE in the RAN range, the gNB notifies the NGC (optional, gNB deletes the NR UE context), and the core network pages are advertised by the NGC (paging in the TA range)
  • the subsequent UE initiates an uplink process by responding to the paging from the eLTE, and the uplink process may adopt the manner in the example 1 or the example 2.
  • the scenario of the example 4 is: the inactive state UE enters the eLTE network from the NR, and there is no uplink/downlink traffic/signaling.
  • Example 4 The network architecture and specific scenarios of Example 4 are the same as those of Example 1.
  • the UE enters an inactive state at the NR, and both the gNB and the UE side maintain a set of NR UE contexts.
  • the gNB can configure the UE with a valid time timer of the NR UE context, and once the UE enters the eLTE, the timer is started. If the gNB does not configure the timer or configure the timer to be infinite, the UE keeps the NR UE context.
  • the UE in the inactive state enters the eLTE network from the NR network. After the UE enters the eLTE network, it enters the idle state, still retains the UE context of the NR, and starts a valid timer (if any). During the operation of the active timer (if any), the UE does not initiate uplink/downlink traffic/signaling in the eLTE network. After the UE returns to the NR network, the UE directly enters the inactive state, and restores the NR UE context and stops the timer. Optionally, the UE performs an RNA update on the NR.
  • the UE deletes the NRUE context.
  • Example 5 Inactive state UE enters LTE network from NR
  • Example 5 is as shown in FIG. 3 in the background art, and a specific scenario is shown in FIG.
  • the UE enters an inactive state at the NR, and both the gNB and the UE side maintain a set of NR UE contexts.
  • the gNB can configure the UE with a valid time timer of the NRUE context, and once the UE enters the LTE, the timer is started. If the gNB does not configure the timer or configure the timer to be infinite, the UE keeps the NRUE context.
  • the UE in the inactive state enters the LTE network from the NR network. After the UE enters the LTE network, it enters the idle state, still retains the NR UE context, and starts a valid timer (if any).
  • the UE initiates an RRC connection establishment, and the UE notifies the current UE identifier (such as S-TMSI), or the inactive UE ID associated with the NR UEcontext or the gNB identifier that holds the NR UE context, and the UE stops the NR UE context timer. (if any) and remove the NR UE context.
  • the EPC of the LTE notifies the NGC of the information of the UE entering the LTE network, and the NGC finds the gNB that holds the NR UEcontext based on the UE identity, or the inactive UE ID, or the gNB identifier that holds the NR UE context, notifies the gNB to release the NR UE context, and releases The connection of the UE in the NR network (including the NG2 and NG3 interfaces).
  • the mobility management method, the core network, and the base station provided by the embodiments of the present disclosure, after the UE in the inactive state enters the eLTE/LTE network from the NR network, the NR UE context is still retained, and the NR is deleted until certain conditions are met.
  • the UE context may be that the UE initiates an RRC connection setup in the eLTE/LTE network, and the received paging or NR UE context valid timer expires.
  • the embodiment of the present disclosure implements the inter-RAT mobility management of the UE in the inactive state, and can solve the mobility problem between the different systems, so that the terminal can work normally.

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
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Abstract

La présente invention concerne un procédé de gestion de mobilité de réseau d'accès inter-radio, un dispositif de réseau central et une station de base. Lorsqu'un mouvement inter-système se produit sur un terminal dans un état inactif, des informations de contexte d'utilisateur du terminal dans l'état inactif dans le système NR sont toujours conservées ; et les informations de contexte d'utilisateur sont supprimées jusqu'à ce que certaines conditions soient satisfaites. L'invention réalise une gestion de mobilité inter-RAY d'un terminal dans un état inactif et résout un problème de mobilité inter-système, ce qui permet au terminal de fonctionner normalement.
PCT/CN2017/119232 2016-12-28 2017-12-28 Procédé de gestion de mobilité de réseau d'accès inter-radio, dispositif de réseau central et station de base WO2018121644A1 (fr)

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CN115038050B (zh) * 2021-03-05 2023-09-05 中国移动通信有限公司研究院 业务通知方法、装置、设备及可读存储介质
CN115038050A (zh) * 2021-03-05 2022-09-09 中国移动通信有限公司研究院 业务通知方法、装置、设备及可读存储介质

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