WO2021218643A1 - 网络切换方法、装置、设备及存储介质 - Google Patents

网络切换方法、装置、设备及存储介质 Download PDF

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Publication number
WO2021218643A1
WO2021218643A1 PCT/CN2021/087360 CN2021087360W WO2021218643A1 WO 2021218643 A1 WO2021218643 A1 WO 2021218643A1 CN 2021087360 W CN2021087360 W CN 2021087360W WO 2021218643 A1 WO2021218643 A1 WO 2021218643A1
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Prior art keywords
information
network
radio
cell
pdu session
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PCT/CN2021/087360
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English (en)
French (fr)
Inventor
马伟
刘红军
李冬梅
文武
张博山
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中兴通讯股份有限公司
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Priority to US17/921,314 priority Critical patent/US20230180074A1/en
Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to CA3176823A priority patent/CA3176823A1/en
Priority to JP2022564835A priority patent/JP7392173B2/ja
Priority to EP21797865.9A priority patent/EP4145904A4/en
Publication of WO2021218643A1 publication Critical patent/WO2021218643A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0033—Control or signalling for completing the hand-off for data sessions of end-to-end connection with transfer of context information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0072—Transmission or use of information for re-establishing the radio link of resource information of target access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0058—Transmission of hand-off measurement information, e.g. measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0061—Transmission or use of information for re-establishing the radio link of neighbour cell information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/00838—Resource reservation for handover
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • 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
    • H04W36/144—Reselecting a network or an air interface over a different radio air interface technology
    • H04W36/1443—Reselecting a network or an air interface over a different radio air interface technology between licensed networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0069—Transmission or use of information for re-establishing the radio link in case of dual connectivity, e.g. decoupled uplink/downlink
    • H04W36/00698—Transmission or use of information for re-establishing the radio link in case of dual connectivity, e.g. decoupled uplink/downlink using different RATs

Definitions

  • This application relates to the field of communication technologies, for example, to a network switching method, device, device, and storage medium.
  • the target of the User Equipment (UE) after the handover The 5th Generation mobile communication technology (5G) base station can connect to the evolved universal terrestrial radio before the handover.
  • the new radio-dual connectivity (Evolved Universal Terrestrial Radio Access) And the Secondary Node (SN) in the New Radio-Dual Connectivity (EN-DC) network is the same 5G base station, and the UE can continue to use the original radio resources.
  • the secondary node (SN) in the EN-DC network after the UE handover can be the same 5G base station as the 5G base station before the handover, and the UE can continue to use the original radio resources. How to make the 5G base station before the UE handover know that it is the same base station before and after the handover and reserve the radio resources of the UE is a problem that needs to be solved.
  • This application provides methods, devices, equipment, and storage media for network switching.
  • An embodiment of the present application provides a network switching method, which is applied to a first communication node, and includes: receiving a first message, wherein the first message carries wireless resource indication information; and reserving network switching according to the wireless resource indication information Some or all of the radio resources of the former source cell.
  • An embodiment of the present application provides a network handover method.
  • the method is applied to a second communication node and includes: sending a first message to the first communication node, wherein the first message carries radio resource indication information, and the wireless
  • the resource indication information is used to instruct to reserve part or all of the radio resources of the source cell after the network is switched.
  • An embodiment of the present application provides a network switching device, which is configured in a first communication node and includes: a receiving module configured to receive a first message, wherein the first message carries radio resource indication information; and a reservation module , Is configured to reserve part of the radio resources or all the radio resources of the source cell before the network handover according to the radio resource indication information.
  • An embodiment of the present application provides a network switching device, which is configured in a first communication node and includes: a sending module configured to send a first message to the first communication node, wherein the first message carries wireless resources Indication information, the radio resource indication information is used to instruct to reserve part of the radio resources or all the radio resources of the source cell after the network handover.
  • An embodiment of the present application provides a device, the device includes: one or more processors; a memory for storing one or more programs; when the one or more programs are executed by the one or more processors , So that the one or more processors implement any one of the methods in the embodiments of the present application.
  • the embodiment of the present application provides a storage medium that stores a computer program, and when the computer program is executed by a processor, any one of the methods in the embodiments of the present application is implemented.
  • Figure 1 is a schematic diagram of the 5G network architecture
  • FIG. 2 is a schematic diagram of the EN-DC architecture in related technologies
  • FIG. 3 is a schematic flowchart of a network handover method provided by an embodiment of this application.
  • FIG. 3a is a schematic flowchart of a network handover method provided by an embodiment of this application.
  • Figure 4 is a terminal provided by an embodiment of the application when it initiates a voice call in the fourth generation mobile communication technology (4th Generation mobile communication technology, 4G) and 5G, as well as 5G stand alone (SA)/non-independent (Non- A flowchart of the method for switching between StandAlone (NSA) modes;
  • 4G fourth generation mobile communication technology
  • 5G stand alone
  • SA stand alone
  • Non-independent Non- A flowchart of the method for switching between StandAlone (NSA) modes
  • FIG. 5 is a flowchart of a method for switching between 4G and 5G, and 5G SA/NSA modes when a terminal initiates a voice call according to an embodiment of the application;
  • FIG. 6 is a flowchart of a method for switching between 4G and 5G, and 5G SA/NSA modes when a terminal initiates a voice call according to an embodiment of the application;
  • FIG. 7 is a flowchart of a method for switching between 4G and 5G, and 5G SA/NSA modes when a terminal initiates a voice call according to an embodiment of the application;
  • FIG. 8 is a flowchart of a method for switching between 4G and 5G, and 5G SA/NSA modes when a terminal initiates a voice call according to an embodiment of the application;
  • FIG. 9 is a flowchart of a method for a terminal to perform network handover based on a measurement report of the current network according to an embodiment of the application;
  • FIG. 10 is a flowchart of a method for a terminal to perform network handover based on a measurement report of the current network according to an embodiment of the application;
  • Fig. 11 is a flowchart of a method for a terminal to perform network switching based on a measurement report of the current network according to an embodiment of the application;
  • FIG. 12 is a flowchart of a method for a terminal to perform network handover based on a measurement report of the current network according to an embodiment of the application;
  • FIG. 13 is a schematic structural diagram of a network switching device provided by an embodiment of this application.
  • FIG. 13a is a schematic structural diagram of a network switching device provided by an embodiment of this application.
  • FIG. 14 is a schematic structural diagram of a device provided by an embodiment of the present application.
  • the base station (NG-RAN node, next generation NodeB (gNB)) of the 5G network can support large-capacity services (such as Mobile Broad Band (MBB)).
  • Figure 1 is a schematic diagram of the 5G network architecture.
  • the 5G network includes a 5G core network (5G Core, 5GC) and a 5G base station gNB.
  • the 5GC includes network element nodes such as Access Mobility Function (AMF), Session Management Function (SMF) nodes, and User Plane Function (UPF) nodes.
  • the 5G base station is also called: gNB, Next Generation Radio Access Network (NG-RAN) node.
  • the 5G base station adopts a new physical layer air interface design.
  • the new physical layer air interface supports New Radio (NR), NR Radio Access Technology (RAT) standard base stations, and related base station network element interfaces.
  • the 5G base station is connected to each other (including the Next Generation-Control plane (NG-C) (signaling) connection and the next-generation user plane (Next Generation-User) through the standardized Next Generation (NG) interface and 5GC. plane, NG-U) (user data) connection), and NG-RAN base stations (gNB or next generation-evolved NodeB (ng-eNB)) are connected to each other through the Xn interface (including Xn Control plane (Xn-Control plane, Xn-C) connection and Xn user plane (Xn-User plane, Xn-U) connection).
  • Xn interface including Xn Control plane (Xn-Control plane, Xn-C) connection and Xn user plane (Xn-User plane, Xn-U) connection).
  • 5G can provide MBB service, but 5G network may not support voice service (Voice service), that is, voice call interface (Voice over New Radio, VoNR) function under 5G access is not supported.
  • VoIP service voice service
  • VoNR voice call interface
  • the mobile terminal connected to the 5G network is also called User Equipment (UE), and needs to be switched to a 4G (Long Term Evolution (LTE)) network to establish voice services.
  • UE User Equipment
  • 4G Long Term Evolution
  • the 4G network generally Both support Voice over Long Term Evolution (VoLTE) functions based on the Long Term Evolution network.
  • the 4G network includes the 4G core network, namely the Evolved Packet Core (EPC) and the 4G Radio Access Network (Long Term Evolution Radio Access Network, LTE RAN).
  • EPC includes the Mobility Management Entity, MME) nodes, Serving Gateway (SGW) nodes, Public Data Network (PDN) Gateway (PDN Gateway, PGW) nodes and other basic network element nodes, while 4G Radio Access Network (RAN) ) Includes the interface between an evolved Node B (evolved Node B, eNB) and related base station network elements.
  • EPC includes the Mobility Management Entity, MME) nodes, Serving Gateway (SGW) nodes, Public Data Network (PDN) Gateway (PDN Gateway, PGW) nodes and other basic network element nodes, while 4G Radio Access Network (RAN) )
  • MME Mobility Management Entity
  • SGW Serving Gateway
  • PDN Gateway Public Data Network Gateway
  • PGW Packet Gateway
  • RAN 4G Radio Access Network
  • FIG. 2 is a schematic diagram of the EN-DC architecture in related technologies.
  • a terminal is simultaneously connected to an eNB (4G base station, LTE base station) and acts as a master node (Master Node, MN) and is connected to a gNB ( 5G base station, NR base station) and as a secondary node (Secondary Node, SN).
  • This master node eNB is connected to the 4G core network EPC through the S1 interface, and is connected to the 5G base station through the X2 interface.
  • the 5G base station gNB can also be connected to the EPC through an S1 user plane (S1-User plane, S1-U) interface, and can also be connected to other 5G base stations through an X2 user plane (X2-User plane, X2-U) interface.
  • S1-User plane S1-U
  • X2-User plane X2-U
  • the network mode in which two base stations (such as a 4G base station and a 5G base station in the EN-DC architecture) are tightly coupled to provide communication services for the UE is called Dual Connectivity (DC)
  • DC Dual Connectivity
  • the two base stations are further divided into a primary node (MN, also called a first network element) and a secondary node (SN, also called a second network element).
  • MN primary node
  • SN secondary node
  • the dual-connection network design can increase the communication capacity of a session.
  • the UE In the scenario where the UE switches from the SA 5G network to the EN-DC network, the UE was originally connected to the SA 5G network, and the UE is performing the MBB service. At this time, it needs to perform the voice service (such as answering a voice call or making a voice call). However, the 5G network cannot support voice services. The UE needs to switch to the LTE network to establish the VoLTE service. The UE needs to continue the original MBB service, so the UE switches to the EN-DC network and establishes a VoLTE connection at the LTE RAN node (node) , Establish the original MBB service connection on the NG-RAN node.
  • the UE switches from the EN-DC network to the SA 5G network.
  • the UE was originally connected to the EN-DC network, S-MN (Source Master Node is LTE eNB), S-SN (Source Secondary Node is gNB, also known as: NG-RAN node)
  • S-MN Source Master Node is LTE eNB
  • S-SN Source Secondary Node is gNB, also known as: NG-RAN node
  • the UE ends the VoLTE service (such as hanging up the call) and continues the 5G service (such as broadband streaming service, MBB service), the UE switches to the SA 5G network, Stand Alone NR).
  • MBB broadband streaming service
  • the secondary node (SN) in the EN-DC network after the UE handover and the SA 5G base station before the UE handover are the same and the same base station
  • a method is provided to make the UE work in the same 5G
  • the radio resources on the base station can continue to be used without being released.
  • a similar method is also provided for the above-mentioned second scenario.
  • the target 5G base station after the UE handover can learn that the target 5G base station after the handover and the source 5G base station before the handover are the same 5G base station, and the UE can continue to use the original radio resources.
  • the 5G base station before the UE handover can learn this and reserve the UE's radio resources.
  • the source base station before the UE handover will release the radio resources of the UE after learning that the UE handover is successful, so that the target 5G base station after the handover cannot continue to use the radio resources of the UE.
  • the embodiments of the present application provide a method, device, device, and storage medium for network handover, so that the target 5G base station after the UE handover can learn that it is the same 5G base station as the source 5G base station before the handover, and the UE can continue to use it The original wireless resources.
  • an embodiment of the present application provides a network handover method
  • FIG. 3 is a schematic flowchart of a network handover method provided by an embodiment of the present application. This method can be applied to the situation where the UE continues to use the original radio resources before and after the network handover.
  • the method may be executed by the network switching device provided by the present application, and the network switching device may be implemented by software and/or hardware, and the method is applied to the first communication node.
  • the network switching method provided by the embodiment of the present application mainly includes steps S11 and S12.
  • the first message is sent by the second communication node.
  • the first communication node can be understood as a user terminal in the network.
  • the user terminal is a device with wireless transceiver function, which can be deployed on land, including indoor or outdoor, handheld, wearable or vehicle-mounted; the user terminal can also be deployed on the water (such as a ship, etc.); users Terminals can also be deployed in the air (for example, airplanes, balloons, satellites, etc.).
  • the user terminal may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with wireless transceiver function, a virtual reality (VR) terminal, an augmented reality (AR) terminal, an industrial control (industrial control) Wireless terminals in ), wireless terminals in self-driving, wireless terminals in remote medical, wireless terminals in smart grid, and wireless terminals in transportation safety , Wireless terminals in smart cities, wireless terminals in smart homes, etc.
  • the embodiments of this application do not limit the application scenarios.
  • a user terminal may sometimes be called a terminal, an access terminal, a UE unit, a UE station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a UE terminal, a wireless communication device, a UE agent, or a UE device.
  • the embodiments of the application are not limited.
  • the second communication node may be understood as a network node on the source side.
  • the second communication node When the network is switched from the SA 5G network to the EN-DC network, the second communication node may be understood as a 5G base station in the SA 5G network.
  • the second communication node When the network is switched from the EN-DC network to the SA 5G network, the second communication node can be understood as the master node in the EN-DC network.
  • the first message is a radio resource control (Radio Resource Control, RRC) reconfiguration message, or the first message is a radio control message.
  • RRC Radio Resource Control
  • the radio resource indication information includes: source cell reservation indication information, or secondary cell information, or reserved protocol data unit (Protocol Data Unit, PDU) session information, or non-access stratum (Non -Access Stratum, NAS) resource reservation indication, or suspension indication, or QoS flow reservation information.
  • source cell reservation indication information or secondary cell information
  • reserved protocol data unit Protocol Data Unit, PDU
  • non-access stratum Non -Access Stratum, NAS resource reservation indication
  • suspension indication or QoS flow reservation information.
  • the source cell reservation indication information is used to instruct to reserve part or all of the radio resources of the source cell after the network handover.
  • part or all of the radio resources of the source cell are reserved.
  • the secondary cell information is information of a single secondary cell or a list of secondary cells.
  • the NAS resource reservation indication is used to indicate that after a network handover, part or all of the NAS resources of the source cell are reserved, where some or all of the NAS resources include one or more of the following: UE registration status , Tracking Area Updating (TAU) information, integrity and encryption information.
  • TAU Tracking Area Updating
  • the suspension indication is used to instruct to reserve part or all of the radio resources of the source cell after the network handover.
  • the part or all of the wireless resources include: part or all of the wireless connection, where the wireless connection includes at least one of the following: RRC connection, signaling radio bearer (Siganling Radio Bearer, SRB) , Data Radio Bearer (DRB), PDU session context, NAS layer connection.
  • RRC connection signaling radio bearer (Siganling Radio Bearer, SRB) , Data Radio Bearer (DRB), PDU session context, NAS layer connection.
  • SRB Signaling Radio Bearer
  • DRB Data Radio Bearer
  • PDU session context NAS layer connection.
  • the part or all of the wireless resources include: part or all of the wireless configuration, where the wireless configuration includes at least one of the following: Layer 1 (Layer 1, L1) (physical layer) configuration , Media Access Control (MAC) layer configuration, Radio Link Control (RLC) layer configuration, RRC layer configuration, Packet Data Convergence Protocol (PDCP) layer configuration, NAS layer Configuration.
  • Layer 1 Layer 1, L1
  • MAC Media Access Control
  • RLC Radio Link Control
  • PDCP Packet Data Convergence Protocol
  • NAS layer Configuration NAS layer Configuration.
  • the reserved PDU session information is used to instruct to reserve the PDU session after the network is switched.
  • the reserved PDU session information includes: PDU session reservation indication information, or an information list of PDU sessions to be reserved; wherein, the PDU session information list includes one or more PDU sessions Information.
  • the QoS flow reservation information is used to instruct to reserve QoS flow or QoS flow information after the network is switched.
  • reserving part or all of the radio resources includes: continuing to use the downlink bandwidth part (BandWidth Part, BWP); according to the resource indicator value (Resource Indicate Value) in the downlink control information (Downlink Control Information, DCI) , RIV) indicates information to receive downlink data sent by a Physical Downlink Shared Channel (Physical Downlink Shared Channel, PDSCH).
  • BWP downlink bandwidth part
  • DCI Downlink Control Information
  • RIV indicates information to receive downlink data sent by a Physical Downlink Shared Channel (Physical Downlink Shared Channel, PDSCH).
  • L CRBs is the length of continuous resource blocks (Resource Block, RB), Is the number of RBs in the downlink bandwidth, and RB start is the starting resource block in the downlink bandwidth.
  • reserving part or all of the radio resources includes: reserving the UE’s Cell-Radio Network Temporary Identifier (C-RNTI), wherein the UE is used to receive DCI information .
  • C-RNTI Cell-Radio Network Temporary Identifier
  • reserving part or all of the radio resources includes: reserving an uplink control channel physical uplink control channel (Physical Uplink Control Channel, PUCCH) resource allocation method; and/or, a set of allocated PUCCH resources.
  • PUCCH Physical Uplink Control Channel
  • reserving part or all of the radio resources includes: reserving one or more data radio bearers (DRB); reserving one or more signaling radio bearers (SRB); and reserving one of SRB1 or SRB2 Modified to SRB3.
  • DRB data radio bearers
  • SRB signaling radio bearers
  • reserving part or all of the wireless resources includes: continuing to use the original PDU session for data transmission; or, after the first communication node initiates the PDU session, rebuilding and restoring the data connection.
  • reserving part or all of the wireless resources includes: using the security context before the network handover.
  • reserving part or all of the radio resources includes: reserving a dedicated control channel (Dedicated Control Channel, DCCH).
  • DCCH Dedicated Control Channel
  • reserving the DCCH includes: continuing to send and receive data according to the DCCH.
  • reserving part or all of the wireless resources includes: reserving part or all of the QOS flow or QOS flow information.
  • retaining the QOS flow or QOS flow information includes: continuing to use the QOS flow and/or QOS flow information to send and/or receive user plane data.
  • FIG. 3a is a schematic flowchart of a network handover method provided by an embodiment of the present application.
  • This method can be applied to the situation where the UE continues to use the original radio resources before and after the network handover.
  • the method may be executed by the network switching device provided by the present application, and the network switching device may be implemented by software and/or hardware, and the method is applied to the second communication node.
  • the network switching method provided by the embodiment of the present application mainly includes step S21.
  • the second communication node is a network node on the source side.
  • the first message is an RRC reconfiguration message, or the first message is a radio control message.
  • the radio resource indication information includes: source cell reservation indication information, or secondary cell information, or reserved PDU session information, or NAS resource reservation indication, or suspension indication, or QoS flow reservation information .
  • the source cell reservation indication information is used to instruct to reserve part or all of the radio resources of the source cell after the network handover.
  • part or all of the radio resources of the source cell are reserved.
  • the secondary cell information is information of a single secondary cell or a list of secondary cells.
  • the NAS resource reservation indication is used to indicate that after a network handover, part or all of the NAS resources of the source cell are reserved, where some or all of the NAS resources include one or more of the following: UE registration status , TAU information, integrity and encryption information.
  • the suspension indication is used to instruct to reserve part or all of the radio resources of the source cell after the network handover.
  • the part or all of the wireless resources include: part or all of the wireless connection, where the wireless connection includes at least one of the following: RRC connection, SRB, DRB, PDU session context, NAS layer connection .
  • the part or all of the wireless resources include: part or all of the wireless configuration, where the wireless configuration includes at least one of the following: L1 (physical layer) configuration, MAC layer configuration, RLC layer configuration , RRC layer configuration, PDCP layer configuration, NAS layer configuration.
  • L1 physical layer
  • MAC layer configuration MAC layer configuration
  • RLC layer configuration MAC layer configuration
  • RRC layer configuration PDCP layer configuration
  • NAS layer configuration NAS layer configuration
  • the reserved PDU session information is used to instruct to reserve the PDU session after the network is switched.
  • the reserved PDU session information includes: PDU session reservation indication information, or an information list of PDU sessions to be reserved; wherein, the PDU session information list includes one or more PDU sessions Information.
  • the QoS flow reservation information is used to instruct to reserve QoS flow or QoS flow information after the network is switched.
  • FIG. 4 is a flowchart of a method for switching between 4G and 5G and 5G SA/NSA modes when a terminal initiates a voice call according to an embodiment of the application.
  • This embodiment is the operation between the terminal and the target RAN node and the RAN node of the source network in the above embodiment; this embodiment involves three network nodes, network node 1 is the UE; network node 2 is the network where the UE currently resides Node NR gNB; network node 3 is an evolved universal terrestrial radio access (Evolved-Universal Radio Access, E-UTRA) eNB of the target network RAN network node for UE handover.
  • E-UTRA evolved universal terrestrial radio access
  • a UE in the RRC connected state actively initiates an Internet Protocol Multimedia Subsystem (IMS) voice call service to the RAN node gNB of the source network to which it belongs.
  • IMS Internet Protocol Multimedia Subsystem
  • the gNB After the core network (Core Network, CN) finds that the current 5G system (5G System, 5GS) does not support the IMS voice service, the gNB sends a MobilityFromNRCommand message from NR to notify the UE to switch to the EN-DC network;
  • the MobilityFromNRCommand message contains secondary cell or cell group information (NR).
  • S403 The terminal initiates a handover to E-UTRA according to the MobilityFromNRCommand. If the terminal finds that the secondary cell or cell group information is consistent with the cell or cell group information of the source network node gNB; after completing the handover to the cell network node eNB of the E-UTRA; retain part or all of the information with the source network node gNB.
  • the EN-DC network transmits data through the reserved partial wireless connection or wireless configuration or partial or all reserved PDU SESSION.
  • the UE After the UE receives the MobilityFromNRCommand message carrying 0 to multiple secondary cells or cell group information, if one cell or cell group information in the 0 to multiple secondary cells or cell group information is related to the cell of the source cell
  • the information or cell group information is consistent or the same network node gNB is used; the UE does not initiate a wireless configuration or wireless connection establishment request with the network node gNB of the secondary cell or cell group.
  • the UE After the UE receives the MobilityFromNRCommand message, if one cell or cell group information in the 0 to more secondary cells or cell group information is consistent with the cell information or cell group information of the source cell or uses the same network node gNB; The UE reserves part or all of the wireless configuration or part or all of the wireless connection with the S-MN network node gNB of the source cell.
  • the UE After the UE receives the MobilityFromNRCommand message carrying the primary cell or cell group information, if one of the cells or cell group information is consistent with the cell information or cell group information of the source cell or uses the same network node gNB; the UE retains the information with the source Part or all of the radio resources of the S-MN network node gNB of the cell.
  • the part or all of the connection includes: RRC connection; part or all of SRB; part or all of DRB.
  • the part or all of the wireless resources include: physical layer resources, MAC resources, SRB, DRB, PDCP entities, and Service Data Adaptation Protocol (SDAP) entities.
  • the wireless configuration includes: part or all of the L1 (physical layer) configuration, part or all of the MAC layer configuration, part or all of the RLC layer configuration, part or all of the RRC layer configuration; part or all of the PDCP layer configuration, part Or all NAS configuration.
  • the shown step S401 initiating a voice call service includes the following processing:
  • the terminal sends an invite message to the IMS server via gNB, the IMS server sends a 100trying message to the UE via gNB, the UE sends 183 Session Progress to the IMS server via gNB, the IMS server sends a Provisional ACKnowledgement (PRACK) message to the UE, and the UE sends a 200 OK message to the IMS server.
  • the IMS server sends a 100trying message to the UE via gNB
  • the UE sends 183 Session Progress to the IMS server via gNB
  • the IMS server sends a Provisional ACKnowledgement (PRACK) message to the UE
  • PRACK Provisional ACKnowledgement
  • the reserved part or all of the physical layer configuration includes: the UE continues to use the downlink BWP, and receives downlink data sent by the PDSCH according to the RIV indication information in the DCI.
  • L CRBs is the length of consecutive RBs
  • Is the number of RBs in the downlink bandwidth
  • RB start is the starting resource block in the downlink bandwidth.
  • the reserving part or all of the physical layer configuration includes: reserving the C-RNTI of the UE, and the C-RNTI of the UE is used for receiving the DCI information.
  • the reserved part or all of the physical layer configuration includes: reserved uplink control channel PUCCH resource allocation mode, and/or reserved allocated PUCCH resource set.
  • the reserving part or all of the wireless connections includes: reserving one or more DRBs (Data Radio Bearers).
  • DRBs Data Radio Bearers
  • the reserving part or all of the wireless connections includes: reserving one or more SRBs (Signaling Radio Bearers).
  • SRBs Signaling Radio Bearers
  • the reserving part or all of the wireless connection includes: modifying one of SRB1 or SRB2 to SRB3.
  • the reserving part or all of the NAS configuration includes reserving the registration status of the UE, and/or TAU information, and/or integrity and encryption information.
  • the UE After the UE completes the handover, it continues to use the original PDU SESSION for data transmission; or initiates the reconstruction of the PDN connection in the E-sgNB to restore the data connection.
  • the UE After the UE completes the handover, it continues to use the original PDU SESSION for data transmission; or initiates the reconstruction of the PDU SEESSION in the E-sgNB to restore the data connection.
  • FIG. 5 is a flowchart of a method for switching between 4G and 5G and 5G SA/NSA modes when a terminal initiates a voice call according to an embodiment of the application.
  • This embodiment involves three network nodes, the network node 1 is the UE; the network node 2 is the NR g-NB of the network where the UE currently resides; and the network node 3 is the E-UTRA e-NB of the target network where the UE is handed over.
  • the UE processing the RRC connected state actively initiates an IMS voice call service to its gNB.
  • the eNB After the CN finds that the current 5GS does not support the IMS voice service, the eNB sends a MobilityFromNRCommand message to notify the UE to switch to the EN-DC network; the MobilityFromNRCommand message contains indication information for reserving the source NR cell.
  • the terminal initiates a handover to E-UTRA according to the MobilityFromNRCommand; after completing the cell handover to the E-UTRA; reserves part or all of the wireless connection or wireless configuration of the source NR cell or reserves part or all of the PDU SESSION .
  • the part or all of the connection includes: RRC connection; and related SRB and DRB.
  • the part or all of the wireless resources include: L1 (physical layer) resources, MAC resources, SRB, DRB, PDCP entities, and SDAP entities.
  • the wireless configuration includes: part or all of the L1 (physical layer) configuration, part or all of the MAC layer configuration, part or all of the RLC layer configuration, part or all of the RRC layer configuration; part or all of the PDCP layer configuration, part Or all NAS configuration.
  • the EN-DC network performs data transmission through the reserved part or all of the wireless connection or wireless configuration or PDU SESSION.
  • FIG. 6 is a flowchart of a method for a terminal to switch between 4G, 5G, and 5G SA/NSA modes according to an embodiment of this application.
  • This embodiment involves three network nodes, the network node 1 is the UE; the network node 2 is the NR g-NB of the network where the UE currently resides; and the network node 3 is the E-UTRA e-NB of the target network where the UE is handed over.
  • the UE in the RRC connected state sends a measurement report to the gNB.
  • the gNB sends a MobilityFromNRCommand message to notify the UE to switch to the EN-DC network; the MobilityFromNRCommand message contains the target master node (T-MN) information (master eNB (M-eNB)) of the E-UTRA and reserves the source NR cell Instructions.
  • T-MN target master node
  • M-eNB master eNB
  • S603 The terminal initiates a handover to E-UTRA according to the MobilityFromNRCommand; after completing the cell handover to the E-UTRA; reserves part or all of the radio bearers of the source NR cell.
  • the reserving part or all of the radio bearers of the source cell includes: reserving part or all of the original physical layer resource configuration, reserving part or all of the SDAP entities or PDCP entities in SRB1, SRB2, and DRB; reserving all of the NR network Or part of the PDU SESSION; for all or part of the PDU SESSION, the corresponding PDN CONNECTION connection re-establishment is initiated on the EN-DC network.
  • the eNB schedules the UE to transmit control signaling or data through the reserved part of the SRB or DRB or PDU SESSION according to network requirements.
  • FIG. 7 is a flowchart of a method for a terminal to switch between 4G, 5G, and 5G SA/NSA modes according to an embodiment of the application.
  • This embodiment involves three network nodes, the network node 1 is the UE; the network node 2 is the NR gNB of the network where the UE currently resides; and the network node 3 is the E-UTRA eNB of the target network for the UE handover.
  • the UE in the RRC connected state sends a measurement report to the gNB.
  • the eNB sends a MobilityFromNRCommand message to notify the UE to switch to the EN-DC network;
  • the MobilityFromNRCommand message contains E-UTRA T-MN information (M-eNB) and target secondary node (T-SN) information (gNB)
  • the terminal initiates a handover to E-UTRA according to the MobilityFromNRCommand; after completing the cell handover to the E-UTRA; if the T-SN is the source NR cell (that is, the T-SN is the node of the source NR cell) ; Retain part or all of the radio bearers of the source NR cell.
  • the reserving part or all of the radio bearers of the source cell includes: reserving part or all of the original physical layer resource configuration, or reserving part or all of the SDAP entities or PDCP entities in the SRB1, SRB2, and DRB; reserving the NR network All or part of the PDU SESSION; for all or part of the PDU SESSION, the corresponding PDN CONNECTION reconstruction is initiated on the EN-DC network.
  • the eNB schedules the UE to transmit control signaling or data through the reserved part of the SRB or DRB or PDU SESSION according to network requirements.
  • FIG. 8 is a flowchart of a method for switching between 4G and 5G, and 5G SA/NSA modes when a terminal voice calls a called party according to an embodiment of this application.
  • This embodiment involves three network nodes, the network node 1 is the UE; the network node 2 is the NR gNB of the network where the UE currently resides; and the network node 3 is the E-UTRA eNB of the target network for the UE handover.
  • the CN tries to initiate the IMS called voice call service for the UE in the connected state, and after finding that the 5GS does not support the IMS Voice service, the eNB sends a MobilityFromNRCommand message to notify the UE in the connected state to switch to the EN-DC network; in the MobilityFromNRCommand message Contains T-MN information (M-eNB) of E-UTRA and T-SN information.
  • M-eNB MobilityFromNRCommand message
  • the terminal initiates a handover to E-UTRA according to the MobilityFromNRCommand; sends an RRC reconfiguration (RRCRECONFIGURATION) message to the eNB.
  • RRC reconfiguration RRCRECONFIGURATION
  • the reserving part or all of the radio resources of the source cell includes one of the following: reserving part or all of the original physical layer (Layer1, L1) resource configuration, reserving part or all of the SDAP entities in SRB1, SRB2, and DRB, or PDCP entity; reserves all or part of the PDU SESSION in the NR network; for all or part of the PDU SESSION, the corresponding PDN CONNECTION connection re-establishment is not initiated in the EN-DC network.
  • the EN-DC network transmits control signaling or data through the reserved part of SRB or DRB or PDU SESSION.
  • FIG. 9 is a flowchart of a method for a terminal to perform network handover based on a measurement report of the current network according to an embodiment of this application.
  • the UE is connected to the EN-DC 5G network in a connected state, and the terminal is connected to the EN-DC 5G network.
  • the NR node gNB is performing Enhanced Mobile Broadband (EMMB) services.
  • EMMB Enhanced Mobile Broadband
  • the network side finds that the UE needs to switch the MN cell; in order to ensure the continuity of the EMMB service, especially the continuity of the PDU SESSION data ;
  • the switching process is as follows:
  • the eNB sends an RRC Connection Reconfiguration (RRC Connection Reconfiguration) message to notify the UE to switch to another EN-DC network; wherein the RRC Connection Reconfiguration message includes a primary cell or cell group and zero to multiple secondary cells or cell groups.
  • RRC Connection Reconfiguration RRC Connection Reconfiguration
  • the UE receives the RRCConnectionReconfiguration, initiates a handover to the target EN-DC cell specified in the RRCConnectionReconfiguration, and sends an RRC connection reconfiguration complete (RRCConnectionReconfigurationComplete) message to the eNB of the target cell to complete the handover from the NR cell to the EN-DC cell .
  • the UE decides whether to retain all or part of the PDU SESSION of the current UE and the source cell (S-MN, gNB) according to the secondary cell or cell group in the RRCConnectionReconfiguration.
  • the primary cell or cell group and 0 to multiple secondary cells or cell groups are consistent with the source cell or cell group, then part or all of the current UE and source cell (S-MN, GNB) information between the UE and the source cell is reserved. All or part of the PDU SESSION.
  • the UE After the handover, the UE retains the S-MN PDU SESSION with the source cell; the UE does not initiate the SESSION identification (Identifier, ID) and/or Internet Protocol (IP) address and/or access point name ( Request to create a new PDU SESSION of Access Point Name, APN) information; create a new PDU SESSION.
  • SESSION identification Identifier, ID
  • IP Internet Protocol
  • APN Access Point Name
  • the UE receives and/or sends data through some or all of the reserved PDU SESSION.
  • FIG. 10 is a flowchart of a method for a terminal to perform a network handover based on a measurement report of the current network according to an embodiment of this application.
  • the UE was originally connected to the SA 5G network, and the UE is performing MBB services.
  • voice services such as answering voice calls or initiating voice phone calls
  • the UE needs to switch to the LTE network to establish the VoLTE service (Voice based on LTE).
  • the original MBB service needs to be continued, so the UE switches to the EN-DC network, establishes a VoLTE connection on the LTE RAN node, and establishes the original MBB service connection on the NG-RAN node.
  • the UE is connected to the 5G base station (S-gNB) of the original SA 5G network, also known as the original node (S-node).
  • the T-MN (Target Master node) is the LTE eNB, Also called M-eNB (Master eNB)
  • T-SN (Target Secondary node) is a 5G base station, that is, NG-RAN node.
  • the switching process is as follows:
  • the gNB sends a MobilityFromNRCommand message to notify the UE to switch to the EN-DC network; wherein the MobilityFromNRCommand message contains an instruction to reserve the source cell (i.e., the source NR cell).
  • the UE receives the MobilityFromNRCommand, initiates handover to the target EN-DC cell, and sends an RRCConnectionReconfigurationComplete message to the e-NB of the target cell to complete the handover from the NR cell to the EN-DC cell.
  • the UE decides whether to reserve all or part of the PDU SESSION of the current UE and the source cell or cell group (S-MN, gNB) according to the indication of reserving the source cell in the MobilityFromNRCommand. If the indicated indication information is to reserve the source cell, then reserve part or all of the current UE and source cell (S-MN, gNB) PDU SESSION of part or all of the secondary node S-SN of the UE and the source cell.
  • the UE After the UE receives the MobilityFromNRCommand message carrying the indication information of the T-MN and the reserved source cell, if the indication information is to reserve the source cell, the UE does not initiate reconstruction for the PDU SESSION of the reserved source cell.
  • the UE After the handover, the UE retains the S-MN PDU SESSION with the source cell; the UE does not initiate a new PDU SESSION establishment request based on the PDU SESSION ID and/or IP address and/or APN information; establishes a new PDU SESSION.
  • FIG. 11 is a flowchart of a method for a terminal to perform network handover based on a measurement report of the current network provided by an embodiment of the application.
  • the UE is connected to the EN-DC5G network in a connected state, and the terminal is connected to the NR
  • the node gNB is performing the EMMB service, and according to the current network measurement report, the network side finds that the UE needs to switch the MN cell; in order to ensure the continuity of the EMMB service, the network hopes to maintain the current wireless configuration or wireless connection of the SN cell.
  • the switching process is as follows:
  • the eNB sends an RRCConnectionReconfiguration message to notify the UE to switch to another EN-DC network; wherein the RRCConnectionReconfiguration message includes the secondary cell or cell group reservation indication information.
  • the UE receives the RRCConnectionReconfiguration, initiates a handover to the target EN-DC cell, and sends an RRCConnectionReconfigurationComplete message to the eNB of the target cell to complete the handover from the NR cell to the EN-DC cell.
  • the UE decides whether to reserve the current wireless configuration or wireless connection between the UE and the source secondary cell or cell group according to the reservation indication information of the secondary cell or cell group in the RRCConnectionReconfiguration. If the indication information indicates to reserve the secondary cell, part or all of the wireless configuration or wireless connection between the UE and the source secondary cell or cell group is reserved.
  • the EN-DC network communicates with the UE through the T-MN and the reserved part or all of the wireless configuration or wireless connection of the source secondary cell or cell group.
  • the UE After the UE receives the RRCConnectionReconfiguration message carrying the indication information of the secondary cell reservation of the T-MN, if the indication information indicates that the secondary cell is reserved, the UE does not initiate conformity with the information of the source secondary cell or cell group or The wireless configuration or wireless connection update or reestablishment of the secondary cell or cell group using the same network node.
  • the UE After the UE receives the RRCConnectionReconfiguration message carrying the indication information of the secondary cell reservation of the T-MN, if the indication information indicates that the secondary cell is reserved, the UE reserves part or all of the radio resources with the source secondary cell or cell group.
  • the part or all of the wireless resources include: L1 (physical layer) resources, MAC resources, SRB, DRB, PDCP entities, and SDAP entities.
  • the wireless configuration includes: part or all of the L1 (physical layer) configuration, part or all of the MAC layer configuration, part or all of the RLC layer configuration, part or all of the RRC layer configuration; part or all of the PDCP layer configuration, part Or all NAS configuration.
  • FIG. 12 is a flowchart of a method for a terminal to perform network handover based on a measurement report of the current network according to an embodiment of this application.
  • the UE was originally connected to the SA 5G network and the UE is performing MBB service.
  • voice services such as answering voice calls or initiating voice phone calls
  • the UE needs to switch to the LTE network to establish the VoLTE service (Voice based on LTE).
  • the original MBB service needs to be continued, so the UE switches to the EN-DC network, establishes a VoLTE connection on the LTE RAN node, and establishes the original MBB service connection on the NG-RAN node.
  • the UE In the NR network, the UE needs to establish a PDU SESSION with the network for data communication. In order to maintain data continuity during network switching, the UE generally releases the current PDU SESSION after the network switch and establishes a new PDU SESSION or session in the target cell. Description protocol connection (Session Description Procotol CONNECTION, SDP CONNECTION); at this time, PDU session or SDP CONNECTION re-establishment will temporarily terminate data transmission; in order to ensure higher data continuity, the target cell’s T-SN and the current cell’s S- When the MNRAN nodes or cells are consistent, the process is as follows:
  • the gNB sends a MobilityFromNRCommand message to notify the UE to switch to the EN-DC network; the MobilityFromNRCommand message includes a PDU SESSION reservation indication.
  • the UE receives the MobilityFromNRCommand, initiates handover to the target EN-DC cell, and sends an RRCConnectionReconfigurationComplete message to the eNB of the target cell.
  • the UE decides whether to reserve all or part of the PDU SESSION of the current UE and the node (S-MN, gNB) of the source cell or cell group according to the PDU reservation indication information in the MobilityFromNRCommand. If the indicated information is to reserve the source cell, then reserve part or all of the UE and the secondary node S-SN of the source cell. All or part of the PDU of the current UE and the node (S-MN, gNB) of the source cell or cell group SESSION .
  • the UE After the UE receives the MobilityFromNRCommand message carrying the indication information of the T-MN and reserved PDU SESSION, if the indication information is a reserved PDU, the UE does not initiate re-establishment for the reserved PDU SESSION of the source cell.
  • the PDU SESSION reservation indication information may be an indication of PDU SESSION reservation, or a list of PDU SESSION information that needs to be reserved.
  • the UE after the handover retains the PDU SESSION with the S-MN of the source cell; the UE does not initiate a new PDU SESSION establishment request based on the ID and/or IP address and/or APN information of the PDU SESSION; establish a new PDU SESSION.
  • this embodiment provides a UE that supports handover between different networks, and the UE performs the following operations:
  • the UE receives the MobilityFromNRCommand message of the NR, where the MobilityFromNRCommand message contains the source cell reservation indication information, or cell or cell group information.
  • the UE decides whether to reserve all or part of the PDU SESSION in the source network according to the source cell reservation indication information or the relationship between the cell or cell group information and the source cell or cell group.
  • the UE continues to communicate through the reserved PDU SESSION.
  • the UE After the handover, the UE retains the S-MN PDU SESSION with the source cell; the UE does not initiate a new PDU SESSION establishment request based on the PDU SESSION ID and/or IP address and/or APN information; establishes a new PDU SESSION .
  • this embodiment provides a UE that supports handover between different networks, and the UE performs the following operations:
  • the UE receives the MobilityFromNRCommand message of the NR, and the MobilityFromNRCommand message contains reserved PDU SESSION information.
  • the UE decides whether to reserve all or part of the PDU SESSION in the source network according to the reserved PDU SESSION information.
  • the UE continues to communicate through the reserved PDU SESSION.
  • the UE After the handover, the UE retains the S-MN PDU SESSION with the source cell; the UE does not initiate a new PDU SESSION establishment request based on the PDU SESSION ID and/or IP address and/or APN information; establishes a new PDU SESSION .
  • the reserved PDU SESSION information may be: an indication of reserved PDU SESSION; or an information list of PDU SESSION that needs to be reserved; the PDU SESSION information list includes at least one PDU SESSION information.
  • a network node that supports handover between different networks: sends a MobilityFromNRCommand or RRCCONNECTION RECONFIGURATION message, and the MobilityFromNRCommand or RRCCONNECTION RECONFIGURATION message contains source cell reservation indication information, or cell or cell Group information, or PDU SESSION reserved information or DRB reserved information.
  • the cell reservation indication information is used to instruct the terminal to reserve all or part of the wireless connection or wireless configuration of the source cell after the handover.
  • the cell or cell information may be used to instruct the terminal to reserve all or part of the wireless connection or wireless configuration of the source cell after the handover.
  • the cell reservation indication information may be used to instruct the terminal to reserve all or part of the wireless connection or wireless configuration of the source cell after the handover.
  • the DRB reservation information is used to instruct the terminal to reserve part or all of the DRB after cell handover.
  • the cell or cell information may be used to instruct the terminal to reserve all or part of the radio resource configuration or all or part of the wireless connection or all or part of the PDU SEESSION of the source cell after the handover.
  • the PDU SESSION reservation information is used to instruct the terminal to reserve all or part of the radio resource configuration of the source cell, or all or part of the wireless connection, or all or part of the PDU SEESSION.
  • a network node core network element of the target network that supports handover between different networks: after receiving an RRCCONNECTION RECONFIGURATION message sent by a terminal that reserves some or all of the source cell's wireless connection or wireless resources , The network performs data communication through some or all of the reserved wireless connections or wireless configurations.
  • a network node target network core network element that supports switching between different networks: After receiving the RRCCONNECTION RECONFIGURATION message sent by the terminal that reserves the PDU SESSION, the network passes the reserved part or all of the RRCCONNECTION RECONFIGURATION message PDU SESSION carries on data communication.
  • an embodiment of the present application provides a network switching device
  • FIG. 13 is a schematic structural diagram of a network switching device provided by an embodiment of the application.
  • the device can be applied to the situation where the UE continues to use the original radio resources before and after the network switch.
  • the network switching device may be implemented by software and/or hardware, and the method is applied to the first communication node.
  • the network switching device provided by the embodiment of the present application mainly includes a receiving module 131 and a reservation module 132.
  • the receiving module 131 is configured to receive a first message, where the first message carries radio resource indication information.
  • the reservation module 132 is configured to reserve part or all of the radio resources of the source cell according to the radio resource indication information.
  • the first message is sent by the first communication node.
  • the first message is an RRC reconfiguration message, or the first message is a radio control message.
  • the radio resource indication information includes: source cell reservation indication information, or secondary cell information, or reserved PDU session information, or NAS resource reservation indication, or suspension indication, or QoS flow reservation information .
  • the source cell reservation indication information is used to instruct to reserve part or all of the radio resources of the source cell after the network handover.
  • part or all of the radio resources of the source cell are reserved.
  • the secondary cell information is information of a single secondary cell or a list of secondary cells.
  • the NAS resource reservation indication is used to indicate that after a network handover, part or all of the NAS resources of the source cell are reserved, where some or all of the NAS resources include one or more of the following: UE registration status , TAU information, and integrity and encryption information.
  • the suspension indication is used to instruct to reserve part or all of the radio resources of the source cell after the network handover.
  • the part or all of the wireless resources include: part or all of the wireless connection, where the wireless connection includes at least one of the following: RRC connection, SRB, DRB, PDU session context, NAS layer connection .
  • the part or all of the wireless resources include: part or all of the wireless configuration, where the wireless configuration includes at least one of the following: L1 (physical layer) configuration, MAC layer configuration, RLC layer configuration , RRC layer configuration, PDCP layer configuration, NAS layer configuration.
  • L1 physical layer
  • MAC layer configuration MAC layer configuration
  • RLC layer configuration MAC layer configuration
  • RRC layer configuration PDCP layer configuration
  • NAS layer configuration NAS layer configuration
  • the reserved PDU session information is used to instruct to reserve the PDU session after the network is switched.
  • the reserved PDU session information includes: PDU session reservation indication information, or an information list of PDU sessions to be reserved; wherein, the PDU session information list includes one or more PDU sessions Information.
  • the QoS flow reservation information is used to instruct to reserve QoS flow or QoS flow information after the network is switched.
  • the reservation module 132 is configured to continue to use the downlink bandwidth part (BWP); according to the RIV indication information in the downlink control information (DCI), the downlink data sent by the PDSCH is received.
  • BWP downlink bandwidth part
  • DCI downlink control information
  • L CRBs is the length of consecutive RBs
  • Is the number of RBs in the downlink bandwidth
  • RB start is the starting resource block in the downlink bandwidth.
  • the reservation module 132 is configured to reserve the C-RNTI of the UE, where the C-RNTI of the UE is used to receive DCI information.
  • the reservation module 132 is configured to reserve the resource allocation mode of the uplink control channel PUCCH; and/or reserve the allocated PUCCH resource set.
  • the reservation module 132 is configured to reserve one or more data radio bearers (DRB); reserve one or more signaling radio bearers (SRB); modify one of SRB1 or SRB2 to SRB3.
  • DRB data radio bearers
  • SRB signaling radio bearers
  • the reservation module 132 is configured to continue to use the original PDU session for data transmission; or, after the first communication node initiates the PDU session, the data connection is reestablished and restored.
  • the reservation module 132 is configured to use the security context before the network switch.
  • the reservation module 132 is configured to reserve the DCCH.
  • reserving the DCCH includes: continuing to send and receive data according to the DCCH.
  • the retention module 132 is configured to retain part or all of the QOS flow or QOS flow information.
  • retaining the QOS flow or QOS flow information includes: continuing to use the QOS flow and/or QOS flow information to send and/or receive user plane data.
  • the network switching device provided in this embodiment can execute the network switching method provided in any embodiment of the present application, and has corresponding functional modules for executing the method.
  • the network handover method provided in any embodiment of this application.
  • the various units and modules included are only divided according to the functional logic, but are not limited to the above-mentioned division, as long as the corresponding functions can be realized; the names of the functional units are only for It is easy to distinguish each other and is not used to limit the scope of protection of this application.
  • FIG. 13a is a schematic structural diagram of a network switching device provided in an embodiment of the application.
  • the device can be applied to the situation where the UE continues to use the original radio resources before and after the network switch.
  • the network switching device may be implemented by software and/or hardware, and the device is configured in the second communication node.
  • the network switching device provided in this embodiment of the present application mainly includes a sending module 1301.
  • the sending module 1301 is configured to send a first message to the first communication node, where the first message carries radio resource indication information, and the radio resource indication information is used to instruct to reserve part or all of the radio resources of the source cell after network handover. resource.
  • the second communication node is an in-source network node.
  • the first message is an RRC reconfiguration message, or the first message is a radio control message.
  • the radio resource indication information includes: source cell reservation indication information, or secondary cell information, or reserved PDU session information, or NAS resource reservation indication, or suspension indication, or QoS flow reservation information .
  • the source cell reservation indication information is used to instruct to reserve part or all of the radio resources of the source cell after the network handover.
  • part or all of the radio resources of the source cell are reserved.
  • the secondary cell information is information of a single secondary cell or a list of secondary cells.
  • the NAS resource reservation indication is used to indicate that after a network handover, part or all of the NAS resources of the source cell are reserved, where some or all of the NAS resources include one or more of the following: UE registration status , TAU information, integrity and encryption information.
  • the suspension indication is used to instruct to reserve part or all of the radio resources of the source cell after the network handover.
  • the part or all of the wireless resources include: part or all of the wireless connection, where the wireless connection includes at least one of the following: RRC connection, SRB, DRB, PDU session context, NAS layer connection .
  • the part or all of the wireless resources include: part or all of the wireless configuration, where the wireless configuration includes at least one of the following: L1 (physical layer) configuration, MAC layer configuration, RLC layer configuration , RRC layer configuration, PDCP layer configuration, NAS layer configuration.
  • L1 physical layer
  • MAC layer configuration MAC layer configuration
  • RLC layer configuration MAC layer configuration
  • RRC layer configuration PDCP layer configuration
  • NAS layer configuration NAS layer configuration
  • the reserved PDU session information is used to instruct to reserve the PDU session after the network is switched.
  • the reserved PDU session information includes: PDU session reservation indication information, or a list of information about PDU sessions that need to be reserved; wherein the list of PDU session information includes one or more PDU sessions Information.
  • the QoS flow reservation information is used to instruct to reserve QoS flow or QoS flow information after the network is switched.
  • the network switching device provided in this embodiment can execute the network switching method provided in any embodiment of the present application, and has corresponding functional modules for executing the method.
  • the network handover method provided in any embodiment of this application.
  • the various units and modules included are only divided according to the functional logic, but are not limited to the above-mentioned division, as long as the corresponding functions can be realized; the names of the functional units are only for It is easy to distinguish each other and is not used to limit the scope of protection of this application.
  • FIG. 14 is a schematic structural diagram of a device provided by an embodiment of the present application.
  • the device includes a processor 141, a memory 142, an input device 143, an output device 144, and The communication device 145; the number of processors 141 in the device can be one or more.
  • One processor 141 is taken as an example in FIG. 14; Other ways of connection, Figure 14 takes the bus connection as an example.
  • the memory 142 can be used to store software programs, computer-executable programs, and modules, such as program instructions/modules corresponding to the network switching method in the embodiment of the present application (for example, the receiving module in the network switching device). 131 and reservation module 132). Another example is the program instruction/module corresponding to the network switching method in the embodiment of the present application (for example, the sending module 1301 in the network switching device).
  • the processor 141 executes various functional applications and data processing of the device by running software programs, instructions, and modules stored in the memory 142, that is, implements any method provided in the embodiments of the present application.
  • the memory 142 may mainly include a program storage area and a data storage area.
  • the program storage area may store an operating system and an application program required by at least one function; the data storage area may store data created according to the use of the device, and the like.
  • the memory 142 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other non-volatile solid-state storage devices.
  • the memory 142 may include a memory remotely provided with respect to the processor 141, and these remote memories may be connected to the device through a network. Examples of the aforementioned networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.
  • the input device 143 can be used to receive inputted numeric or character information, and generate key signal input related to user settings and function control of the device.
  • the output device 144 may include a display device such as a display screen.
  • the communication device 145 may include a receiver and a transmitter.
  • the communication device 145 is configured to perform information transceiving and communication under the control of the processor 141.
  • the embodiments of the present application also provide a storage medium containing computer-executable instructions, which are used to implement a network switching method when executed by a computer processor, and the method is applied to a first communication node, so The method includes: receiving a first message, wherein the first message carries radio resource indication information; and reserving part or all of the radio resources of the source cell according to the radio resource indication information.
  • An embodiment of the present application provides a storage medium containing computer-executable instructions.
  • the computer-executable instructions are used to implement operations that are not limited to the above-mentioned network switching method, and can also be used to implement the operations provided by any embodiment of the present application. Related operations in the network switching method.
  • the embodiments of the present application also provide a storage medium containing computer-executable instructions, which are used to implement a network switching method when executed by a computer processor, and the method is applied to a second communication node.
  • the method includes: sending a first message to a first communication node, where the first message carries radio resource indication information, and the radio resource indication information is used to instruct to reserve part or all of the radio resources of the source cell after the network is switched.
  • An embodiment of the present application provides a storage medium containing computer-executable instructions.
  • the computer-executable instructions are used to implement operations that are not limited to the above-mentioned network switching method, and can also be used to implement the operations provided by any embodiment of the present application. Related operations in the network switching method.
  • this application can be implemented by software and general hardware, or can be implemented by hardware.
  • the technical solution of the present application can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as a computer floppy disk, read-only memory (ROM), Random Access Memory (RAM), flash memory (FLASH), hard disk or optical disk, etc., including multiple instructions to enable a computer device (which can be a personal computer, server, or network device, etc.) to execute each of this application The method described in the embodiment.
  • user terminal encompasses any suitable type of wireless user equipment, such as a mobile phone, a portable data processing device, a portable web browser, or a vehicle-mounted mobile station.
  • the various embodiments of the present application can be implemented in hardware or dedicated circuits, software, logic or any combination thereof.
  • some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software that may be executed by a controller, microprocessor, or other computing device, although the present application is not limited thereto.
  • Computer program instructions can be assembly instructions, Instruction Set Architecture (ISA) instructions, machine instructions, machine-related instructions, microcode, firmware instructions, state setting data, or written in any combination of one or more programming languages Source code or object code.
  • ISA Instruction Set Architecture
  • the block diagram of any logic flow in the drawings of the present application may represent program steps, or may represent interconnected logic circuits, modules, and functions, or may represent a combination of program steps and logic circuits, modules, and functions.
  • the computer program can be stored on the memory.
  • the memory can be of any type suitable for the local technical environment and can be implemented using any suitable data storage technology, such as but not limited to read only memory (ROM), random access memory (RAM), optical storage devices and systems (digital multi-function optical discs) (Digital Video Disc, DVD) or Compact Disc (CD)), etc.
  • Computer-readable media may include non-transitory storage media.
  • the data processor can be of any type suitable for the local technical environment, such as but not limited to general-purpose computers, special-purpose computers, microprocessors, digital signal processors (Digital Signal Processors, DSP), application specific integrated circuits (Application Specific Integrated Circuits, ASIC), programmable logic devices (Field Programmable Gate Array, FPGA), and processors based on multi-core processor architecture.
  • DSP Digital Signal Processors
  • ASIC Application Specific Integrated Circuits
  • FPGA Field Programmable Gate Array
  • processors based on multi-core processor architecture such as but not limited to general-purpose computers, special-purpose computers, microprocessors, digital signal processors (Digital Signal Processors, DSP), application specific integrated circuits (Application Specific Integrated Circuits, ASIC), programmable logic devices (Field Programmable Gate Array, FPGA), and processors based on multi-core processor architecture.

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Abstract

本申请提出一种网络切换方法、装置、设备及存储介质，所述方法应用于第一通信节点，包括：接收第一消息，其中，所述第一消息中携带无线资源指示信息；根据无线资源指示信息保留源小区的部分或者全部无线资源。

Description

网络切换方法、装置、设备及存储介质 技术领域
本申请涉及通信技术领域，例如涉及一种网络切换方法、装置、设备及存储介质。
背景技术
用户设备(User Equipment，UE)切换后的目标第五代移动通信技术(5th Generation mobile communicaton technology，5G)基站可以与切换前的演进通用陆地无线电接入新无线电-双连接(Evolved Universal Terrestrial Radio Access and New Radio-Dual Connectivity，EN-DC)网络中的辅节点(Secondary Node，SN)是同一个5G基站，该UE可以继续使用原先的无线资源。UE切换后的EN-DC网络中的辅节点(SN)可以与切换前的5G基站是同一个5G基站，该UE可以继续使用原先的无线资源。如何使得UE切换前的5G基站可以获知切换前后是同一基站，并保留该UE的无线资源，是一个需要解决的问题。
发明内容
本申请提供用于网络切换的方法、装置、设备和存储介质。
本申请实施例提供一种网络切换方法，所述方法应用于第一通信节点，包括：接收第一消息，其中，所述第一消息中携带无线资源指示信息；根据无线资源指示信息保留网络切换前源小区的部分无线资源或者全部无线资源。
本申请实施例提供一种网络切换方法，所述方法应用于第二通信节点，包括：向第一通信节点发送第一消息，其中，所述第一消息中携带无线资源指示信息，所述无线资源指示信息用于指示网络切换后保留源小区的部分无线资源或者全部无线资源。
本申请实施例提供一种网络切换装置，所述装置配置于第一通信节点，包括：接收模块，被配置为接收第一消息，其中，所述第一消息中携带无线资源指示信息；保留模块，被配置为根据无线资源指示信息保留网络切换前源小区的部分无线资源或者全部无线资源。
本申请实施例提供一种网络切换装置，所述装置配置于第一通信节点，包括：发送模块，被配置为向第一通信节点发送第一消息，其中，所述第一消息中携带无线资源指示信息，所述无线资源指示信息用于指示网络切换后保留源 小区的部分无线资源或者全部无线资源。
本申请实施例提供一种设备，所述设备包括：一个或多个处理器；存储器，用于存储一个或多个程序；当所述一个或多个程序被所述一个或多个处理器执行，使得所述一个或多个处理器实现本申请实施例中的任意一种方法。
本申请实施例提供了一种存储介质，所述存储介质存储有计算机程序，所述计算机程序被处理器执行时实现本申请实施例中的任意一种方法。
关于本申请的以上实施例和其他方面以及其实现方式，在附图说明、实施方式和权利要求中提供更多说明。
附图说明
图1是5G网络架构的示意图；
图2是相关技术中的EN-DC架构的示意图；
图3为本申请实施例提供的一种网络切换方法的流程示意图；
图3a为本申请实施例提供的一种网络切换方法的流程示意图；
图4为本申请实施例提供的一种终端发起语音呼叫时在第四代移动通信技术(4th Generation mobile communicaton technology，4G)和5G、以及5G独立(Stand Alone，SA)/非独立(Non-StandAlone，NSA)模式间切换的方法的流程图；
图5为本申请实施例提供的一种终端发起语音呼叫时在4G和5G、以及5G SA/NSA模式间切换的方法的流程图；
图6为本申请实施例提供的一种终端发起语音呼叫时在4G和5G、以及5G SA/NSA模式间切换的方法的流程图；
图7为本申请实施例提供的一种终端发起语音呼叫时在4G和5G、以及5G SA/NSA模式间切换的方法的流程图；
图8为本申请实施例提供的一种终端发起语音呼叫时在4G和5G、以及5G SA/NSA模式间切换的方法的流程图；
图9为本申请实施例提供的一种终端基于当前网络的测量报告进行网络切换的方法的流程图；
图10为本申请实施例提供的一种终端基于当前网络的测量报告进行网络切换的方法的流程图；
图11为本申请实施例提供的一种终端基于当前网络的测量报告进行网络切 换的方法的流程图；
图12为本申请实施例提供的一种终端基于当前网络的测量报告进行网络切换的方法的流程图；
图13为本申请实施例提供的一种网络切换装置的结构示意图；
图13a为本申请实施例提供的一种网络切换装置的结构示意图；
图14是本申请实施例提供的一种设备的结构示意图。
具体实施方式
下文中将结合附图对本申请的实施例进行说明。
在附图的流程图示出的步骤可以在诸如一组计算机可执行指令的计算机系统中执行。虽然在流程图中示出了逻辑顺序，但是在一些情况下，可以以不同于此处的顺序执行所示出或描述的步骤。
5G网络的基站(NG-RAN node，下一代节点B(next generation NodeB，gNB))可以支持大容量业务(如：移动宽带(Mobile Broad Band，MBB))。图1是5G网络架构的示意图。如图1所示，5G网络包括5G核心网(5G Core，5GC)和5G基站gNB。5GC包含接入移动功能节点(Access Mobility Function，AMF)，会话管理功能(Session Management Function，SMF)节点和用户面功能(User Plane Function，UPF)节点等网元节点。5G基站也称为：gNB，下一代无线接入网(Next Generation Radio Access Network，NG-RAN)节点。5G基站采用全新物理层空口设计，全新物理层空口支持新空口(New Radio，NR)，NR无线电接入技术(Radio Access Technology，RAT)制式基站，以及相关的基站网元接口。5G基站通过标准化的下一代(Next Generation，NG)接口和5GC相互连接(包含下一代控制面(Next Generation-Control plane，NG-C)(信令)连接和下一代用户面(Next Generation-User plane，NG-U)(用户数据)连接)，而NG-RAN基站(gNB或下一代长期演进型节点B(next generation-evolved NodeB，ng-eNB))之间通过Xn接口相互连接(包含Xn控制面(Xn-Control plane，Xn-C)连接和Xn用户面(Xn-User plane，Xn-U)连接)。
5G可以提供MBB业务，但5G网络可能不支持语音业务(Voice service)，即：不支持5G接入下的语音通话界面(Voice over New Radio，VoNR)功能。在这种情况下，连接到5G网络的移动终端也称为用户设备(User Equipment，UE)，需要切换到4G(长期演进(Long Term Evolution，LTE))网络中建立语音业务，4G网络一般地都支持基于长期演进网络的语音通话(Voice over Long Term Evolution，VoLTE)功能。
4G网络包括4G核心网，即演进的分组核心网(Evolved Packet Core，EPC)和4G无线接入网(Long Term Evolution Radio Access Network，LTE RAN)，其中，EPC包含移动管理实体(Mobility Management Entity，MME)节点，服务网关(Serving Gateway，SGW)节点，公用数据网(Public Data Network，PDN)网关(PDN Gateway，PGW)节点等基本网元节点，而4G无线接入网络(Radio Access Network，RAN)包括演进型节点B(evolved Node B，eNB)和相关的基站网元之间的接口。
为了同时支持移动终端的语音业务和MBB业务，提供了一种EN-DC的网络架构。图2是相关技术中的EN-DC架构的示意图，如图2所示，一个终端同时连接到一个eNB(4G基站，LTE基站)并作为主节点(Master Node，MN)和连接到一个gNB(5G基站，NR基站)并作为辅节点(Secondary Node，SN)。这个主节点eNB通过S1接口连接到4G核心网EPC，并通过X2接口连接到5G基站。而这个5G基站gNB还可以通过S1用户面(S1-User plane，S1-U)接口连接到EPC，也还可以通过X2用户面(X2-User plane，X2-U)接口连接到其他5G基站。
在接入网中，将两个基站(如EN-DC架构中的一个4G基站和一个5G基站)以紧耦合的方式联合为UE提供通信服务的网络模式称为双连接(Dual Connectivity，DC)网络。如图2所示，这两个基站又分为主节点(MN，也称为第一网元)和辅节点(SN，也称为第二网元)。双连接网络的设计，可以提升一次会话的通信容量。
在UE从SA 5G网络切换到EN-DC网络的场景中UE原先连接在SA 5G网络，该UE正在进行MBB业务，此时需要进行语音业务(如：接听语音电话，或者发起语音电话呼叫)，但该5G网络不能支持语音业务，该UE需要切换到LTE网络以建立VoLTE业务，该UE需要继续原先的MBB业务，所以该UE切换到EN-DC网络，在LTE RAN节点(node)建立VoLTE连接，在NG-RAN node建立原先的MBB业务连接。
在UE从EN-DC网络切换到SA 5G网络的场景中。UE原先连接在EN-DC网络，S-MN(源主节点(Source Master Node)是LTE eNB)，S-SN(源辅节点(Source Secondary Node)是gNB，也称为：NG-RAN node)，当UE结束VoLTE业务(如：挂断电话)且继续5G业务(如宽带流媒体业务，MBB业务)，该UE切换到SA 5G网络，Stand Alone NR)。
对于上述第一种场景，当UE切换后的EN-DC网络中的辅节点(SN)与该UE切换前的SA 5G基站是同一个相同基站，提供了一种方法使得该UE在该相同5G基站上的无线资源可以不释放而继续使用。对于上述第二种场景也提供了 相似的方法。UE切换后的目标5G基站可以获知切换后的目标5G基站与切换前的源5G基站是同一个5G基站，该UE可以继续使用原先的无线资源。
但并没有提供一个方法，使得UE切换前的5G基站可以获知这一点，并保留该UE的无线资源。UE切换前的源基站获知UE切换成功后就会释放该UE的无线资源，从而导致切换后的目标5G基站也无法继续使用该UE的无线资源。
本申请实施例提供一种用于网络切换的方法、装置、设备和存储介质，以实现UE切换后的目标5G基站可以获知与切换前的源5G基站是同一个5G基站，该UE可以继续使用原先的无线资源。
在一个实施例中，本申请实施例提供一种网络切换方法，图3为本申请实施例提供的一种网络切换方法的流程示意图。该方法可以适用于网络切换前后UE继续使用原先的无线资源的情况。该方法可以由本申请提供的网络切换装置执行，该网络切换装置可以由软件和/或硬件实现，所述方法应用于第一通信节点中。
如图3所示，本申请实施例提供的网络切换方法主要包括步骤S11和S12。
S11、接收第一消息，其中，所述第一消息中携带无线资源指示信息。
S12、根据无线资源指示信息保留源小区的部分或者全部无线资源。
在一个示例性的实施方式中，所述第一消息为第二通信节点发送。在本实施例中，所述第一通信节点可以理解为网络中的用户终端。本申请实施例中，用户终端是一种具有无线收发功能的设备，可以部署在陆地上，包括室内或室外、手持、穿戴或车载；用户终端也可以部署在水面上(如轮船等)；用户终端还可以部署在空中(例如飞机、气球和卫星上等)。所述用户终端可以是手机(mobile phone)、平板电脑(Pad)、带无线收发功能的电脑、虚拟现实(Virtual Reality，VR)终端、增强现实(Augmented Reality，AR)终端、工业控制(industrial control)中的无线终端、无人驾驶(self driving)中的无线终端、远程医疗(remote medical)中的无线终端、智能电网(smart grid)中的无线终端、运输安全(transportation safety)中的无线终端、智慧城市(smart city)中的无线终端、智慧家庭(smart home)中的无线终端等等。本申请的实施例对应用场景不做限定。用户终端有时也可以称为终端、接入终端、UE单元、UE站、移动站、移动台、远方站、远程终端、移动设备、UE终端、无线通信设备、UE代理或UE装置等。本申请实施例并不限定。
所述第二通信节点可以理解为源侧的网络节点。网络切换由SA 5G网络切换到EN-DC网络的情况下，所述第二通信节点可以理解为SA 5G网络中的5G 基站。网络切换由EN-DC网络切换到SA 5G网络的情况下，所述第二通信节点可以理解为EN-DC网络中的主节点。
在一个示例性的实施方式中，所述第一消息是无线资源控制(Radio Resource Control，RRC)重配消息，或，第一消息是无线控制消息。
在一个示例性的实施方式中，所述无线资源指示信息包括：源小区保留指示信息，或辅小区信息，或保留协议数据单元(Protocol Data Unit，PDU)会话信息，或者非接入层(Non-Access Stratum，NAS)资源保留指示，或者挂起指示，或QoS流保留信息。
在一个示例性的实施方式中，所述源小区保留指示信息用于指示网络切换之后，保留源小区的部分或者全部无线资源。
在一个示例性的实施方式中，基于辅小区信息与源小区信息的关系，网络切换之后，保留源小区的部分或者全部无线资源。
在一个示例性的实施方式中，所述辅小区信息为单个辅小区的信息或者辅小区列表。
在一个示例性的实施方式中，所述NAS资源保留指示用于指示网络切换之后，保留源小区的部分或者全部NAS资源，其中，部分或者全部NAS资源包括如下一个或多个：UE的注册状态，跟踪区更新(Tracking Area Updating，TAU)信息，完整性和加密信息。
在一个示例性的实施方式中，所述挂起指示用于指示网络切换之后，保留源小区的部分或者全部无线资源。
在一个示例性的实施方式中，所述部分或者全部无线资源包括：部分或者全部无线连接，其中，所述无线连接包括以下至少之一：RRC连接、信令无线承载(Siganling Radio Bearer，SRB)、数据无线承载(Data Radio Bearer，DRB)、PDU会话上下文，NAS层连接。
在一个示例性的实施方式中，所述部分或者全部无线资源包括：部分或者全部无线配置，其中，所述无线配置包括以下至少之一：第一层(Layer 1，L1)(物理层)配置，介质访问控制(Media Access Control，MAC)层配置，无线链路层控制(Radio Link Control，RLC)层配置，RRC层配置，分组数据汇聚协议(Packet Data Convergence Protocol，PDCP)层配置，NAS层配置。
在一个示例性的实施方式中，所述保留PDU会话信息用于指示网络切换之后，保留PDU会话。
在一个示例性的实施方式中，所述保留PDU会话信息包括：PDU会话保留 指示信息，或，需保留的PDU会话的信息列表；其中，所述PDU会话的信息列表包括一个或多个PDU会话的信息。
在一个示例性的实施方式中，所述QoS流保留信息用于指示网络切换之后，保留QoS流或QoS流信息。
在一个示例性的实施方式中，保留部分或者全部的无线资源包括：继续使用下行带宽部分(BandWidth Part，BWP)；根据下行控制信息(Downlink Control Information，DCI)中的资源指示值(Resource Indicate Value，RIV)指示信息接收物理下行共享信道(Physical Downlink Shared CHannel，PDSCH)发送的下行数据。
在一个示例性的实施方式中，如果满足
Figure PCTCN2021087360-appb-000001
则
Figure PCTCN2021087360-appb-000002
如果不满足
Figure PCTCN2021087360-appb-000003
则
Figure PCTCN2021087360-appb-000004
其中，L CRBs为连续资源块(Resource Block，RB)的长度，
Figure PCTCN2021087360-appb-000005
为下行带宽RB数，RB start为下行带宽中的起始资源块。
在一个示例性的实施方式中，保留部分或者全部的无线资源包括：保留UE的小区无线网络临时标识(Cell-Radio Network Temporary Identifier，C-RNTI)，其中，所述UE的用于接收DCI信息。
在一个示例性的实施方式中，保留部分或者全部的无线资源包括：保留上行控制信道物理上行控制信道(Physical Uplink Control Channel，PUCCH)的资源分配方式；和/或，分配的PUCCH资源集合。
在一个示例性的实施方式中，保留部分或者全部的无线资源包括：保留一个或者多个数据无线承载(DRB)；保留一个或者多个信令无线承载(SRB)；将SRB1或者SRB2中的一个修改为SRB3。
在一个示例性的实施方式中，保留部分或者全部的无线资源包括：继续使用原有的PDU会话进行数据传输；或，在第一通信节点发起PDU会话后，重建恢复数据连接。
在一个示例性的实施方式中，保留部分或者全部的无线资源包括：使用网络切换前的安全上下文。
在一个示例性的实施方式中，保留部分或者全部的无线资源包括：保留专用控制信道(Dedicated Control Channel，DCCH)。
在一个示例性的实施方式中，保留DCCH包括：继续根据所述DCCH发送和接收数据。
在一个示例性的实施方式中，保留部分或者全部的无线资源包括：保留部 分或者全部的QOS流或QOS流信息。
在一个示例性的实施方式中，保留QOS流或者QOS流信息包括：继续使用所述QOS流和/或QOS流信息进行用户面的数据发送和/或接收。
在一个示例性的实施方式中，本申请实施例提供一种网络切换方法，图3a为本申请实施例提供的一种网络切换方法的流程示意图。该方法可以适用于网络切换前后UE继续使用原先的无线资源的情况。该方法可以由本申请提供的网络切换装置执行，该网络切换装置可以由软件和/或硬件实现，所述方法应用于第二通信节点中。
如图3a所示，本申请实施例提供的网络切换方法主要包括步骤S21。
S21、向第一通信节点发送第一消息，其中，所述第一消息中携带无线资源指示信息，所述无线资源指示信息用于指示网络切换后保留源小区的部分或者全部无线资源。
在一个示例性的实施方式中，所述第二通信节点是在源侧的网络节点。
在一个示例性的实施方式中，所述第一消息是RRC重配消息，或，第一消息是无线控制消息。
在一个示例性的实施方式中，所述无线资源指示信息包括：源小区保留指示信息，或辅小区信息，或保留PDU会话信息，或者NAS资源保留指示，或者挂起指示，或QoS流保留信息。
在一个示例性的实施方式中，所述源小区保留指示信息用于指示网络切换之后，保留源小区的部分或者全部无线资源。
在一个示例性的实施方式中，基于辅小区信息与源小区信息的关系，网络切换之后，保留源小区的部分或者全部无线资源。
在一个示例性的实施方式中，所述辅小区信息为单个辅小区的信息或者辅小区列表。
在一个示例性的实施方式中，所述NAS资源保留指示用于指示网络切换之后，保留源小区的部分或者全部NAS资源，其中，部分或者全部NAS资源包括如下一个或多个：UE的注册状态，TAU信息，完整性和加密信息。
在一个示例性的实施方式中，所述挂起指示用于指示网络切换之后，保留源小区的部分或者全部无线资源。
在一个示例性的实施方式中，所述部分或者全部无线资源包括：部分或者全部无线连接，其中，所述无线连接包括以下至少之一：RRC连接、SRB、DRB、 PDU会话上下文，NAS层连接。
在一个示例性的实施方式中，所述部分或者全部无线资源包括：部分或者全部无线配置，其中，所述无线配置包括以下至少之一：L1(物理层)配置，MAC层配置，RLC层配置，RRC层配置，PDCP层配置，NAS层配置。
在一个示例性的实施方式中，所述保留PDU会话信息用于指示网络切换之后，保留PDU会话。
在一个示例性的实施方式中，所述保留PDU会话信息包括：PDU会话保留指示信息，或，需保留的PDU会话的信息列表；其中，所述PDU会话的信息列表包括一个或多个PDU会话的信息。
在一个示例性的实施方式中，所述QoS流保留信息用于指示网络切换之后，保留QoS流或QoS流信息。
在一个应用性实施方式中，图4为本申请实施例提供的一种终端发起语音呼叫时在4G和5G、以及5G SA/NSA模式间切换的方法的流程图。
本实施例为终端与上述实施例中目标RAN节点和源网络的RAN节点之间的操作；本实施例涉及到三个网络节点，网络节点1为UE；网络节点2为UE当前驻留的网络节点NR gNB；网络节点3为UE切换的目标网络RAN网络节点的演进的通用陆面无线接入(Evolved-Universal Terrestrial Radio Access，E-UTRA)eNB。
S401、处于RRC连接态的UE向所属源网络的RAN节点gNB主动发起网际互连协议多媒体子系统(Internet protocol Multimedia Subsystem，IMS)语音呼叫业务。
S402、所述核心网(Core Network，CN)发现当前5G系统(5G System,5GS)不支持IMS语音业务后，gNB发送来自NR的移动控制(MobilityFromNRCommand)消息通知UE切换到EN-DC网络中；所述MobilityFromNRCommand消息中包含辅小区或小区组信息(NR)。
S403、终端根据所述MobilityFromNRCommand发起到E-UTRA的切换。如果终端发现所述辅小区或小区组信息与源网络节点gNB的小区或者小区组信息一致；在完成到所述E-UTRA的小区网络节点eNB切换后；保留与源网络节点gNB的部分或者全部的无线连接、或者部分或者全部的无线配置、或者部分或者全部的PDU会话(SESSION)。
S404、所述EN-DC网络通过所述保留的部分无线连接或者无线配置或者保 留的部分或者全部PDU SESSION进行数据的传输。
所述UE在接收到所述携带0到多个辅小区或者小区组信息的MobilityFromNRCommand消息后，如果所述0到多个辅小区或者小区组信息中的一个小区或者小区组信息与源小区的小区信息或者小区组信息一致或者使用同一网络节点gNB；UE不发起与所述辅小区或者小区组的网络节点gNB的无线配置或者无线连接建立请求。
所述UE在接收到所述MobilityFromNRCommand消息后，如果所述0到多个辅小区或者小区组信息中一个小区或者小区组信息与源小区的小区信息或者小区组信息一致或者使用同一网络节点gNB；UE保留与源小区的S-MN网络节点gNB的部分或者全部无线配置或者部分或者全部无线连接。
所述UE在接收到携带主小区或者小区组信息的所述MobilityFromNRCommand消息后，如果其中一个小区或者小区组信息与源小区的小区信息或者小区组信息一致或者使用同一网络节点gNB；UE保留与源小区的S-MN网络节点gNB的部分或者全部无线资源。
所述部分或者全部连接包括：RRC连接；部分或者全部的SRB；部分或者全部的DRB。
所述部分或者全部无线资源包括：物理层资源，MAC资源，SRB，DRB，PDCP实体，业务数据适配协议(Service Data Adaptation Protocol，SDAP)实体。
所述无线配置包括：部分或者全部的L1(物理层)配置，部分或者全部的MAC层配置，部分或者全部的RLC层配置，部分或者全部的RRC层配置；部分或者全部的PDCP层配置，部分或者全部NAS配置。
所示步骤S401发起语音呼叫业务包括以下处理：
终端经gNB发送invite消息到IMS服务器，IMS服务器经gNB发送100trying消息到UE，UE经gNB发送183Session Progress到IMS服务器，IMS服务器发送临时确认(Provisional ACKnowledgement，PRACK)消息到UE，UE发送200OK消息到IMS服务器。
所述保留部分或者全部物理层配置包括：UE继续使用所述的下行BWP,并根据DCI中RIV指示信息接收PDSCH发送的下行数据。
RIV值为：如果满足
Figure PCTCN2021087360-appb-000006
则
Figure PCTCN2021087360-appb-000007
如果不满足
Figure PCTCN2021087360-appb-000008
则
Figure PCTCN2021087360-appb-000009
其中，L CRBs为连续RB的长度，
Figure PCTCN2021087360-appb-000010
为下行带宽RB数，RB start为下行带宽中的起始资源块。
所述保留部分或者全部物理层配置包括：保留UE的C-RNTI，UE的C-RNTI用于DCI信息接收。
所述保留部分或者全部物理层配置包括：保留上行控制信道PUCCH的资源分配方式，和/或保留分配的PUCCH资源集合。
所述保留部分或者全部无线连接包括：保留一个或者多个DRB(数据无线承载)。
所述保留部分或者全部无线连接包括：保留一个或者多个SRB(信令无线承载)。
所述保留部分或者全部无线连接包括：将SRB1或者SRB2中的一个修改为SRB3。
所述保留部分或者全部NAS配置：包括保留UE的注册状态，和/或TAU信息，和/或完整性和加密信息。
所述UE完成切换后，继续使用原有的PDU SESSION进行数据传输；或者在E-sgNB发起PDN连接的重建，恢复数据连接。
所述UE完成切换后，继续使用原有的PDU SESSION进行数据传输；或者在E-sgNB发起PDU SEESSION的重建，恢复数据连接。
在一个应用性实施方式中，图5为本申请实施例提供的一种终端发起语音呼叫时在4G和5G、以及5G SA/NSA模式间切换的方法的流程图。本实施例涉及到三个网络节点，网络节点1为UE；网络节点2为UE当前驻留的网络的NR g-NB；网络节点3为UE切换的目标网络的E-UTRA e-NB。
S501、处理RRC连接态的UE向所属gNB主动发起IMS语音呼叫业务
S502、所述CN发现当前5GS不支持IMS语音业务后，eNB发送MobilityFromNRCommand消息通知UE切换到EN-DC网络中；所述MobilityFromNRCommand消息中包含保留源NR小区的指示信息。
S503、终端根据所述MobilityFromNRCommand发起到E-UTRA的切换；在完成到所述E-UTRA的小区切换后；保留部分或者全部的源NR小区的无线连接或者无线配置或者保留部分或者全部的PDU SESSION。
所述部分或者全部连接包括：RRC连接；以及相关的SRB、DRB。
所述部分或者全部无线资源包括：L1(物理层)资源，MAC资源，SRB，DRB，PDCP实体，SDAP实体。
所述无线配置包括：部分或者全部的L1(物理层)配置，部分或者全部的MAC层配置，部分或者全部的RLC层配置，部分或者全部的RRC层配置；部分或者全部的PDCP层配置，部分或者全部NAS配置。
S504、所述EN-DC网络通过所述保留的部分或者全部的无线连接或者无线配置或者PDU SESSION进行数据的传输。
在一个应用性的实施方式中，图6为本申请实施例提供的一种终端在4G和5G、以及5G SA/NSA模式间切换的方法的流程图。本实施例涉及到三个网络节点，网络节点1为UE；网络节点2为UE当前驻留的网络的NR g-NB；网络节点3为UE切换的目标网络的E-UTRA e-NB。
S601、处于RRC连接态的UE向所述gNB发送测量报告。
S602、gNB发送MobilityFromNRCommand消息通知UE切换到EN-DC网络中；所述MobilityFromNRCommand消息中包含E-UTRA的目标主节点(T-MN)信息(主eNB(M-eNB))，以及保留源NR小区的指示信息。
S603、终端根据所述MobilityFromNRCommand发起到E-UTRA的切换；在完成到所述E-UTRA的小区切换后；保留部分或者全部的源NR小区的无线承载。
所述保留部分或者全部源小区的无线承载包括：保留原有的部分或者全部的物理层资源配置，保留SRB1、SRB2和DRB中的部分或者全部的SDAP实体或者PDCP实体；保留NR网络中的全部或者部分PDU SESSION；针对全部或者部分PDU SESSION在EN-DC网络发起对应的PDN CONNECTION的连接重建。
S604，所述eNB根据网络需求调度UE通过所述保留的部分SRB或者DRB或者PDU SESSION进行控制信令或者数据的传输。
在一个应用性的实施方式中，图7为本申请实施例提供的一种终端在4G和5G、以及5G SA/NSA模式间切换方法的流程图。本实施例涉及到三个网络节点，网络节点1为UE；网络节点2为UE当前驻留的网络的NR gNB；网络节点3为UE切换的目标网络的E-UTRA eNB。
S701、处于RRC连接态的UE向所述gNB发送测量报告
S702、eNB发送MobilityFromNRCommand消息通知UE切换到EN-DC网络中；所述MobilityFromNRCommand消息中包含E-UTRA的T-MN信息 (M-eNB)，以及目标辅节点(T-SN)信息(gNB)
S703、终端根据所述MobilityFromNRCommand发起到E-UTRA的切换；在完成到所述E-UTRA的小区切换后；如果所述T-SN为源NR小区(即T-SN为源NR小区的节点)；保留部分或者全部的源NR小区的无线承载。所述保留部分或者全部源小区的无线承载包括：保留原有的部分或者全部的物理层资源配置，或者保留SRB1、SRB2和DRB中的部分或者全部的SDAP实体或者PDCP实体；保留NR网络中的全部或者部分PDU SESSION；针对全部或者部分PDU SESSION在EN-DC网络发起对应的PDN CONNECTION的重建。
S704、所述eNB根据网络需求调度UE通过所述保留的部分SRB或者DRB或者PDU SESSION进行控制信令或者数据的传输。
在一个应用性的实施方式中，图8为本申请实施例提供的一种终端语音呼叫被叫时在4G和5G、以及5G SA/NSA模式间切换的方法的流程图。本实施例涉及到三个网络节点，网络节点1为UE；网络节点2为UE当前驻留的网络的NR gNB；网络节点3为UE切换的目标网络的E-UTRA eNB。
S801、CN尝试针对处于连接态的UE发起IMS被叫语音呼叫业务，发现5GS不支持IMS Voice业务后，eNB发送MobilityFromNRCommand消息通知处于连接态的UE切换到EN-DC网络中；所述MobilityFromNRCommand消息中包含E-UTRA的T-MN信息(M-eNB)，以及T-SN信息。
S802、终端根据所述MobilityFromNRCommand发起到E-UTRA的切换；发送RRC重配(RRCRECONFIGURATION)消息到所述eNB。
如果终端发现所述T-SN信息为当前NR小区；在完成到所述E-UTRA的小区切换后；保留部分或者全部的源NR小区的无线资源。所述保留部分或者全部源小区的无线资源包括以下其中之一：保留原有的部分或者全部的物理层(Layer1，L1)资源配置，保留SRB1、SRB2和DRB中的部分或者全部的SDAP实体或者PDCP实体；保留NR网络中的全部或者部分PDU SESSION；针对全部或者部分PDU SESSION在EN-DC网络不发起对应的PDN CONNECTION的连接重建。
S803、所述EN-DC网络通过所述保留的部分SRB或者DRB或者PDU SESSION进行控制信令或者数据的传输。
在一个应用性的实施方式中，图9为本申请实施例提供的一种终端基于当前网络的测量报告进行网络切换的方法的流程图，UE处于连接态连接在EN-DC 5G网络，终端与NR节点gNB正在进行增强移动宽带(Enhanced Mobile  Broadband，EMMB)业务，根据当前网络的测量报告，网络侧发现UE需要进行MN小区的切换；为了保证EMMB业务的连续性特别是PDU SESSION数据的连续性；切换流程如下：
S901、eNB发送RRC连接重配(RRC ConnectionReconfiguration)消息通知UE切换到另一个EN-DC网络中；其中所述RRCConnectionReconfiguration消息中包含主小区或者小区组和0到多个辅小区或者小区组。
S902、UE接收到所述RRCConnectionReconfiguration，发起到所述RRCConnectionReconfiguration中指明的目标EN-DC小区的切换，发送RRC连接重配完成(RRCConnectionReconfigurationComplete)消息到目标小区的eNB完成NR小区到EN-DC小区的切换。UE依据RRCConnectionReconfiguration中的辅小区或者小区组决定是否保留当前UE与源小区(S-MN,gNB)的全部或者部分PDU SESSION。如果所述主小区或者小区组和0到多个辅小区或者小区组与源小区或者小区组一致，则保留UE与源小区的部分或者全部的当前UE与源小区(S-MN,GNB)的全部或者部分PDU SESSION。
切换后UE保留与源小区的S-MN的PDU SESSION；UE不发起基于该PDU SESSION的标识(Identifier，ID)和/或互联网及协议(Internet Protocol，IP)地址和/或接入点名称(Access Point Name，APN)信息的新的PDU SESSION的建立请求；建立新的PDU SESSION。
所述UE通过保留的部分或者全部PDU SESSION接收和/或发送数据。
在一个应用性的实施方式中，图10为本申请实施例提供的一种终端基于当前网络的测量报告进行网络切换的方法的流程图，UE原先连接在SA 5G网络，该UE正在进行MBB业务，此时需要进行语音业务(如：接听语音电话，或者发起语音电话呼叫)，但该5G网络不能支持语音业务，该UE需要切换到LTE网络以建立VoLTE业务(基于LTE的Voice)，该UE需要继续原先的MBB业务，所以该UE切换到EN-DC网络，在LTE RAN node建立VoLTE连接，在NG-RAN node建立原先的MBB业务连接。
UE连接到原SA 5G网络的5G基站(S-gNB)，也称为原节点(S-node)，UE切换到的目标EN-DC网络中，T-MN(Target Master node)是LTE eNB,也称为M-eNB(Master eNB)，T-SN(Target Secondary node)是5G基站，也就是NG-RAN node。当目标NG-RAN node就是原先的NR node时，切换流程如下：
S1001、gNB发送MobilityFromNRCommand消息通知UE切换到EN-DC网 络中；其中所述MobilityFromNRCommand消息中包含保留源小区(即源NR小区)的指示。
S1002、UE接收到所述MobilityFromNRCommand，发起到目标EN-DC小区的切换，发送RRCConnectionReconfigurationComplete消息到目标小区的e-NB完成NR小区到EN-DC小区的切换。UE依据MobilityFromNRCommand中保留源小区的指示决定是否保留当前UE与源小区或者小区组(S-MN,gNB)的全部或者部分PDU SESSION。如果所示指示信息为保留源小区，则保留UE与源小区的辅节点S-SN的部分或者全部的当前UE与源小区(S-MN,gNB)的全部或者部分PDU SESSION。
S1003、EN-DC网络继续通过保留的PDU SESSION进行通信。
所述UE在接收到所述携带T-MN和保留源小区的指示信息的MobilityFromNRCommand消息后，如果所述指示信息为保留源小区；则针对保留的源小区的PDU SESSION不发起重建。
切换后UE保留与源小区的S-MN的PDU SESSION；UE不发起基于该PDU SESSION的ID和/或IP地址和/或APN信息的新的PDU SESSION的建立请求；建立新的PDU SESSION。
在一个应用性的实施方式中，图11为本申请实施例提供的一种终端基于当前网络的测量报告进行网络切换的方法的流程图，UE处于连接态连接在EN-DC5G网络，终端与NR节点gNB正在进行EMMB业务，根据当前网络的测量报告网络侧发现UE需要进行MN小区的切换；为了保证EMMB业务的连续性，网络希望维持SN小区当前的无线配置或者无线连接。
切换流程如下：
S1101、eNB发送RRCConnectionReconfiguration消息通知UE切换到另一个EN-DC网络中；其中所述RRCConnectionReconfiguration消息中包含辅小区或者小区组保留指示信息。
S1102、UE接收到所述RRCConnectionReconfiguration，发起到目标EN-DC小区的切换，发送RRCConnectionReconfigurationComplete消息到目标小区的eNB完成NR小区到EN-DC小区的切换。UE依据RRCConnectionReconfiguration中辅小区或者小区组保留指示信息决定是否保留当前UE与源辅小区或者小区组的无线配置或者无线连接。如所述指示信息指示保留辅小区，则保留UE与源辅小区或者小区组的部分或者全部的无线配置或者无线连接。
S1103、EN-DC网络通过所述T-MN以及源辅小区或者小区组的保留的部分 或者全部无线配置或者无线连接与UE进行通信。
所述UE在接收到所述携带T-MN的辅小区保留指示信息的RRCConnectionReconfiguration消息后，如果所述指示信息指示保留辅小区，UE不发起与所述与源辅小区或者小区组的信息一致或者使用同一网络节点的辅小区或者小区组的无线配置或者无线连接的更新或者重建。
所述UE在接收到所述携带T-MN的辅小区保留指示信息的RRCConnectionReconfiguration消息后，如果所述指示信息指示保留辅小区，UE保留与源辅小区或者小区组的部分或者全部无线资源。
所述部分或者全部无线资源包括：L1(物理层)资源，MAC资源，SRB，DRB，PDCP实体，SDAP实体。
所述无线配置包括：部分或者全部的L1(物理层)配置，部分或者全部的MAC层配置，部分或者全部的RLC层配置，部分或者全部的RRC层配置；部分或者全部的PDCP层配置，部分或者全部NAS配置。
在一个应用性的实施方式中，图12为本申请实施例提供的一种终端基于当前网络的测量报告进行网络切换的方法的流程图，UE原先连接在SA 5G网络，该UE正在进行MBB业务，此时需要进行语音业务(如：接听语音电话，或者发起语音电话呼叫)，但该5G网络不能支持语音业务，该UE需要切换到LTE网络以建立VoLTE业务(基于LTE的Voice)，该UE需要继续原先的MBB业务，所以该UE切换到EN-DC网络，在LTE RAN node建立VoLTE连接，在NG-RAN node建立原先的MBB业务连接。
在NR网络中UE进行数据通信需要与网络建立PDU SESSION，在网络切换时为了保持数据连续性，一般UE在网络切换后会释放当前的PDU SESSION并在目标小区对应地建立新的PDU SESSION或者会话描述协议连接(Session Description Procotol CONNECTION，SDP CONNECTION)；此时PDU会话或者SDP CONNECTION的重建都会短暂终止数据传输；为了保证更高的数据连续性，在目标小区的T-SN与当前小区的S-MNRAN节点或者小区一致时流程如下：
S1201、gNB发送MobilityFromNRCommand消息通知UE切换到EN-DC网络中；所述MobilityFromNRCommand消息中包含PDU SESSION保留指示。
S1202、UE接收到所述MobilityFromNRCommand，发起到目标EN-DC小区的切换，发送RRCConnectionReconfigurationComplete消息到目标小区的eNB。UE依据MobilityFromNRCommand中PDU保留指示信息决定是否保留当前UE 与源小区或者小区组的节点(S-MN,gNB)的全部或者部分PDU SESSION。如果所示指示信息为保留源小区，则保留UE与源小区的辅节点S-SN的部分或者全部的当前UE与源小区或者小区组的节点(S-MN,gNB)的全部或者部分PDU SESSION。
S1203、EN-DC网络继续通过保留的PDU SESSION进行通信。
所述UE在接收到所述携带T-MN和保留PDU SESSION的指示信息的MobilityFromNRCommand消息后，如果所述指示信息为保留PDU；则针对保留的源小区的PDU SESSION不发起重建。
所述PDU SESSION保留指示信息，可以为保留PDU SESSION的指示，或者需要保留的PDU SESSION的信息的列表。
所述切换后的UE保留与源小区的S-MN的PDU SESSION；UE不发起基于该PDU SESSION的ID和/或IP地址和/或APN信息的新的PDU SESSION的建立请求；建立新的PDU SESSION。
在一个应用性的实施方式中，本实施例提供一种支持不同网络间切换的UE，UE进行如下操作：
UE接收NR的MobilityFromNRCommand消息，所述MobilityFromNRCommand消息中包含源小区保留指示信息、或者小区或者小区组信息。
UE根据所述的源小区保留指示信息、或者小区或者小区组信息与源小区或者小区组的关系决定是否保留源网络中的全部或者部分PDU SESSION。
UE继续通过保留的PDU SESSION进行通信。
所述切换后UE保留与源小区的S-MN的PDU SESSION；UE不发起基于该PDU SESSION的ID和/或IP地址和/或APN信息的新的PDU SESSION的建立请求；建立新的PDU SESSION。
在一个应用性的实施方式中，本实施例提供一种支持不同网络间切换的UE，UE进行如下操作：
UE接收NR的MobilityFromNRCommand消息，所述MobilityFromNRCommand消息中包含保留PDU SESSION信息。
UE根据所述的保留PDU SESSION信息决定是否保留源网络中的全部或者部分PDU SESSION。
UE继续通过保留的PDU SESSION进行通信。
所述切换后UE保留与源小区的S-MN的PDU SESSION；UE不发起基于该PDU SESSION的ID和/或IP地址和/或APN信息的新的PDU SESSION的建立请求；建立新的PDU SESSION。
所述保留PDU SESSION信息可以为：保留PDU SESSION的指示；或者需要保留的PDU SESSION的信息列表；所述PDU SESSION的信息列表包含至少一个PDU SESSION的信息。
在一个应用性的实施方式中，一种支持不同网络间切换的网络节点(源节点)：发送MobilityFromNRCommand或RRCCONNECTION RECONFIGURATION消息，所述MobilityFromNRCommand或RRCCONNECTION RECONFIGURATION消息中包含源小区保留指示信息、或者小区或者小区组信息、或PDU SESSION保留信息或者DRB保留信息。
所述小区保留指示信息用来指示终端在切换后，保留源小区的全部或者部分的无线连接或者无线配置。
所述小区或者小区信息，可以用来指示终端在切换后，保留源小区的全部或者部分的无线连接或者无线配置。
所述小区保留指示信息，可以用来指示终端在切换后，保留源小区的全部或者部分的无线连接或者无线配置。
所述DRB保留信息用来指示终端在切换小区后保留部分或者全部DRB。
所述小区或者小区信息，可以用来指示终端在切换后，保留源小区的全部或者部分无线资源配置或者全部或者部分无线连接或者全部或者部分PDU SEESSION。
所述PDU SESSION保留信息，用来指示终端保留源小区的全部或者部分无线资源配置，或者全部或者部分无线连接，或者全部或者部分PDU SEESSION。
在一个应用性的实施方式中，一种支持不同网络间切换的网络节点(目标网络核心网网元)：在接收到保留部分或者全部源小区无线连接或者无线资源的终端发送的RRCCONNECTION RECONFIGURATION消息后，网络通过保留的部分或者全部无线连接或者无线配置进行数据通信。
在一个应用性的实施方式中，一种支持不同网络间切换的网络节点(目标 网络核心网网元)：在接收到保留PDU SESSION的终端发送的RRCCONNECTION RECONFIGURATION消息后，网络通过保留的部分或者全部PDU SESSION进行数据通信。
在一个实施例中，本申请实施例提供一种网络切换装置，图13为本申请实施例提供的一种网络切换装置的结构示意图。该装置可以适用于网络切换前后UE继续使用原先的无线资源的情况。该网络切换装置可以由软件和/或硬件实现，所述方法应用于第一通信节点中。
如图13所示，本申请实施例提供的网络切换装置主要包括接收模块131和保留模块132。
接收模块131被配置为接收第一消息，其中，所述第一消息中携带无线资源指示信息。
保留模块132被配置为根据无线资源指示信息保留源小区的部分或者全部无线资源。
在一个示例性的实施方式中，所述第一消息为第一通信节点发送。
在一个示例性的实施方式中，所述第一消息是RRC重配消息，或，第一消息是无线控制消息。
在一个示例性的实施方式中，所述无线资源指示信息包括：源小区保留指示信息，或辅小区信息，或保留PDU会话信息，或者NAS资源保留指示，或者挂起指示，或QoS流保留信息。
在一个示例性的实施方式中，所述源小区保留指示信息用于指示网络切换之后，保留源小区的部分或者全部无线资源。
在一个示例性的实施方式中，基于辅小区信息与源小区信息的关系，网络切换之后，保留源小区的部分或者全部无线资源。
在一个示例性的实施方式中，所述辅小区信息为单个辅小区的信息或者辅小区列表。
在一个示例性的实施方式中，所述NAS资源保留指示用于指示网络切换之后，保留源小区的部分或者全部NAS资源，其中，部分或者全部NAS资源包括如下一个或多个：UE的注册状态，TAU信息，以及完整性和加密信息。
在一个示例性的实施方式中，所述挂起指示用于指示网络切换之后，保留源小区的部分或者全部无线资源。
在一个示例性的实施方式中，所述部分或者全部无线资源包括：部分或者 全部无线连接，其中，所述无线连接包括以下至少之一：RRC连接、SRB、DRB、PDU会话上下文，NAS层连接。
在一个示例性的实施方式中，所述部分或者全部无线资源包括：部分或者全部无线配置，其中，所述无线配置包括以下至少之一：L1(物理层)配置，MAC层配置，RLC层配置，RRC层配置，PDCP层配置，NAS层配置。
在一个示例性的实施方式中，所述保留PDU会话信息用于指示网络切换之后，保留PDU会话。
在一个示例性的实施方式中，所述保留PDU会话信息包括：PDU会话保留指示信息，或，需保留的PDU会话的信息列表；其中，所述PDU会话的信息列表包括一个或多个PDU会话的信息。
在一个示例性的实施方式中，所述QoS流保留信息用于指示网络切换之后，保留QoS流或QoS流信息。
在一个示例性的实施方式中，保留模块132，被配置为继续使用下行带宽部分(BWP)；根据下行控制信息(DCI)中RIV指示信息接收PDSCH发送的下行数据。
在一个示例性的实施方式中，如果满足
Figure PCTCN2021087360-appb-000011
则
Figure PCTCN2021087360-appb-000012
如果不满足
Figure PCTCN2021087360-appb-000013
则
Figure PCTCN2021087360-appb-000014
其中，L CRBs为连续RB的长度，
Figure PCTCN2021087360-appb-000015
为下行带宽RB数，RB start为下行带宽中的起始资源块。
在一个示例性的实施方式中，保留模块132，被配置为保留UE的C-RNTI，其中，所述UE的C-RNTI用于接收DCI信息。
在一个示例性的实施方式中，保留模块132，被配置为保留上行控制信道PUCCH的资源分配方式；和/或，保留分配的PUCCH资源集合。
在一个示例性的实施方式中，保留模块132，被配置为保留一个或者多个数据无线承载(DRB)；保留一个或者多个信令无线承载(SRB)；将SRB1或者SRB2中的一个修改为SRB3。
在一个示例性的实施方式中，保留模块132，被配置为继续使用原有的PDU会话进行数据传输；或，在第一通信节点发起PDU会话后，重建恢复数据连接。
在一个示例性的实施方式中，保留模块132，被配置为使用网络切换前的安全上下文。
在一个示例性的实施方式中，保留模块132，被配置为保留DCCH。
在一个示例性的实施方式中，保留DCCH包括：继续根据所述DCCH发送 和接收数据。
在一个示例性的实施方式中，保留模块132，被配置为保留部分或者全部的QOS流或QOS流信息。
在一个示例性的实施方式中，保留QOS流或者QOS流信息包括：继续使用所述QOS流和/或QOS流信息进行用户面的数据发送和/或接收。
本实施例中提供的网络切换装置可执行本申请任意实施例所提供的网络切换方法，具备执行该方法相应的功能模块。未在本实施例中描述的技术细节，可参见本申请任意实施例所提供的网络切换方法。
上述网络切换装置的实施例中，所包括的各个单元和模块只是按照功能逻辑进行划分的，但并不局限于上述的划分，只要能够实现相应的功能即可；各功能单元的名称也只是为了便于相互区分，并不用于限制本申请的保护范围。
在一个示例性的实施方式中，本申请实施例提供一种网络切换装置，图13a为本申请实施例提供的一种网络切换装置的结构示意图。该装置可以适用于网络切换前后UE继续使用原先的无线资源的情况。该网络切换装置可以由软件和/或硬件实现，所述装置配置于第二通信节点中。
如图13a所示，本申请实施例提供的网络切换装置主要包括发送模块1301。
发送模块1301被配置为向第一通信节点发送第一消息，其中，所述第一消息中携带无线资源指示信息，所述无线资源指示信息用于指示网络切换后保留源小区的部分或者全部无线资源。
在一个示例性的实施方式中，所述第二通信节点是在源测网络节点。
在一个示例性的实施方式中，所述第一消息是RRC重配消息，或，第一消息是无线控制消息。
在一个示例性的实施方式中，所述无线资源指示信息包括：源小区保留指示信息，或辅小区信息，或保留PDU会话信息，或者NAS资源保留指示，或者挂起指示，或QoS流保留信息。
在一个示例性的实施方式中，所述源小区保留指示信息用于指示网络切换之后，保留源小区的部分或者全部无线资源。
在一个示例性的实施方式中，基于辅小区信息与源小区信息的关系，网络切换之后，保留源小区的部分或者全部无线资源。
在一个示例性的实施方式中，所述辅小区信息为单个辅小区的信息或者辅小区列表。
在一个示例性的实施方式中，所述NAS资源保留指示用于指示网络切换之后，保留源小区的部分或者全部NAS资源，其中，部分或者全部NAS资源包括如下一个或多个：UE的注册状态，TAU信息，完整性和加密信息。
在一个示例性的实施方式中，所述挂起指示用于指示网络切换之后，保留源小区的部分或者全部无线资源。
在一个示例性的实施方式中，所述部分或者全部无线资源包括：部分或者全部无线连接，其中，所述无线连接包括以下至少之一：RRC连接、SRB、DRB、PDU会话上下文，NAS层连接。
在一个示例性的实施方式中，所述部分或者全部无线资源包括：部分或者全部无线配置，其中，所述无线配置包括以下至少之一：L1(物理层)配置，MAC层配置，RLC层配置，RRC层配置，PDCP层配置，NAS层配置。
在一个示例性的实施方式中，所述保留PDU会话信息用于指示网络切换之后，保留PDU会话。
在一个示例性的实施方式中，所述保留PDU会话信息包括：PDU会话保留指示信息，或，需保留的PDU会话的信息列表；其中，所述PDU会话信息的列表包括一个或多个PDU会话的信息。
在一个示例性的实施方式中，所述QoS流保留信息用于指示网络切换之后，保留QoS流或QoS流信息。
本实施例中提供的网络切换装置可执行本申请任意实施例所提供的网络切换方法，具备执行该方法相应的功能模块。未在本实施例中描述的技术细节，可参见本申请任意实施例所提供的网络切换方法。
上述网络切换装置的实施例中，所包括的各个单元和模块只是按照功能逻辑进行划分的，但并不局限于上述的划分，只要能够实现相应的功能即可；各功能单元的名称也只是为了便于相互区分，并不用于限制本申请的保护范围。
本申请实施例还提供一种设备，图14是本申请实施例提供的一种设备的结构示意图，如图14所示，该设备包括处理器141、存储器142、输入装置143、输出装置144和通信装置145；设备中处理器141的数量可以是一个或多个，图14中以一个处理器141为例；设备中的处理器141、存储器142、输入装置143和输出装置144可以通过总线或其他方式连接，图14中以通过总线连接为例。
存储器142作为一种计算机可读存储介质，可用于存储软件程序、计算机可执行程序以及模块，如本申请实施例中的网络切换方法对应的程序指令/模块 (例如，网络切换装置中的接收模块131和保留模块132)。又如本申请实施例中的网络切换方法对应的程序指令/模块(例如，网络切换装置中的发送模块1301)。处理器141通过运行存储在存储器142中的软件程序、指令以及模块，从而执行设备的各种功能应用以及数据处理，即实现本申请实施例提供的任一方法。
存储器142可主要包括存储程序区和存储数据区，其中，存储程序区可存储操作系统、至少一个功能所需的应用程序；存储数据区可存储根据设备的使用所创建的数据等。存储器142可以包括高速随机存取存储器，还可以包括非易失性存储器，例如至少一个磁盘存储器件、闪存器件、或其他非易失性固态存储器件。在一些实例中，存储器142可包括相对于处理器141远程设置的存储器，这些远程存储器可以通过网络连接至设备。上述网络的实例包括但不限于互联网、企业内部网、局域网、移动通信网及其组合。
输入装置143可用于接收输入的数字或字符信息，以及产生与设备的用户设置以及功能控制有关的键信号输入。输出装置144可包括显示屏等显示设备。
通信装置145可以包括接收器和发送器。通信装置145设置为根据处理器141的控制进行信息收发通信。
本申请实施例还提供一种包含计算机可执行指令的存储介质，所述计算机可执行指令在由计算机处理器执行时用于实现一种网络切换方法，所述方法应用于第一通信节点，所述方法包括：接收第一消息，其中，所述第一消息中携带无线资源指示信息；根据无线资源指示信息保留源小区的部分或者全部无线资源。
本申请实施例所提供的一种包含计算机可执行指令的存储介质，计算机可执行指令用于实现不限于如上所述的网络切换方法的操作，还可以用于实现本申请任意实施例所提供的网络切换方法中的相关操作。
本申请实施例还提供一种包含计算机可执行指令的存储介质，所述计算机可执行指令在由计算机处理器执行时用于实现一种网络切换方法，所述方法应用于第二通信节点，所述方法包括：向第一通信节点发送第一消息，其中，所述第一消息中携带无线资源指示信息，所述无线资源指示信息用于指示网络切换后保留源小区的部分或者全部无线资源。
本申请实施例所提供的一种包含计算机可执行指令的存储介质，计算机可执行指令用于实现不限于如上所述的网络切换方法的操作，还可以用于实现本申请任意实施例所提供的网络切换方法中的相关操作。
通过以上关于实施方式的描述，所属领域的技术人员可以了解到，本申请可借助软件及通用硬件来实现，也可以通过硬件实现。基于这样的理解，本申请的技术方案可以以软件产品的形式体现出来，该计算机软件产品可以存储在计算机可读存储介质中，如计算机的软盘、只读存储器(Read-Only Memory,ROM)、随机存取存储器(Random Access Memory,RAM)、闪存(FLASH)、硬盘或光盘等，包括多个指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述的方法。
以上所述，仅为本申请的示例性实施例而已，并非用于限定本申请的保护范围。
本领域内的技术人员应明白，术语用户终端涵盖任何适合类型的无线用户设备，例如移动电话、便携数据处理装置、便携网络浏览器或车载移动台。
一般来说，本申请的多种实施例可以在硬件或专用电路、软件、逻辑或其任何组合中实现。例如，一些方面可以被实现在硬件中，而其它方面可以被实现在可以被控制器、微处理器或其它计算装置执行的固件或软件中，尽管本申请不限于此。
本申请的实施例可以通过移动装置的数据处理器执行计算机程序指令来实现，例如在处理器实体中，或者通过硬件，或者通过软件和硬件的组合。计算机程序指令可以是汇编指令、指令集架构(Instruction Set Architecture，ISA)指令、机器指令、机器相关指令、微代码、固件指令、状态设置数据、或者以一种或多种编程语言的任意组合编写的源代码或目标代码。
本申请附图中的任何逻辑流程的框图可以表示程序步骤，或者可以表示相互连接的逻辑电路、模块和功能，或者可以表示程序步骤与逻辑电路、模块和功能的组合。计算机程序可以存储在存储器上。存储器可以具有任何适合于本地技术环境的类型并且可以使用任何适合的数据存储技术实现，例如但不限于只读存储器(ROM)、随机访问存储器(RAM)、光存储器装置和系统(数码多功能光碟(Digital Video Disc，DVD)或光盘(Compact Disc，CD))等。计算机可读介质可以包括非瞬时性存储介质。数据处理器可以是任何适合于本地技术环境的类型，例如但不限于通用计算机、专用计算机、微处理器、数字信号处理器(Digital Signal Processor，DSP)、应用专用集成电路(Application Specific Integrated Circuit，ASIC)、可编程逻辑器件(Field Programmable Gate Array，FPGA)以及基于多核处理器架构的处理器。

Claims (30)

  1. 一种网络切换方法，应用于第一通信节点，包括：
    接收第一消息，其中，所述第一消息中携带无线资源指示信息；
    根据所述无线资源指示信息保留源小区的部分无线资源或者全部无线资源。
  2. 根据权利要求1所述的方法，其中，所述第一消息是无线资源控制RRC重配消息，或，所述第一消息是无线控制消息。
  3. 根据权利要求1所述的方法，其中，所述无线资源指示信息包括：源小区保留指示信息，或辅小区信息，或保留协议数据单元PDU会话信息，或非接入层NAS资源保留指示，或挂起指示，或服务质量QoS流保留信息。
  4. 根据权利要求3所述的方法，其中，所述源小区保留指示信息用于指示网络切换之后，保留源小区的部分无线资源或者全部无线资源。
  5. 根据权利要求3所述的方法，其中，所述辅小区信息用于指示基于所述辅小区信息与源小区信息的关系，网络切换之后，保留源小区的部分无线资源或者全部无线资源。
  6. 根据权利要求5所述的方法，其中，所述辅小区信息为单个辅小区的信息或者辅小区列表。
  7. 根据权利要求3所述的方法，其中，所述NAS资源保留指示用于指示网络切换之后，保留源小区的部分NAS资源或者全部NAS资源，其中，所述部分NAS资源或者全部NAS资源包括如下至少一个：用户设备UE的注册状态，跟踪区更新TAU信息，以及完整性和加密信息。
  8. 根据权利要求3所述的方法，其中，所述挂起指示用于指示网络切换之后，保留源小区的部分无线资源或者全部无线资源。
  9. 根据权利要求1所述的方法，其中，所述部分无线资源或者全部无线资源包括：部分无线连接或者全部无线连接，其中，所述无线连接包括以下至少之一：RRC连接、信令无线承载SRB、数据无线承载DRB、PDU会话上下文、NAS层连接。
  10. 根据权利要求1所述的方法，其中，所述部分无线资源或者全部无线资源包括：部分无线配置或者全部无线配置，其中，所述无线配置包括以下至少之一：物理层L1配置，介质访问控制MAC层配置，无线链路控制RLC层配置，RRC层配置，分组数据汇聚协议PDCP层配置，以及NAS层配置。
  11. 根据权利要求3所述的方法，其中，所述保留PDU会话信息用于指示网络切换之后，保留PDU会话。
  12. 根据权利要求11所述的方法，其中，所述保留PDU会话信息包括：PDU会话保留指示信息，或，需保留的PDU会话的信息列表；其中，所述需保留的PDU会话的信息列表包括至少一个PDU会话的信息。
  13. 根据权利要求3所述的方法，其中，所述QoS流保留信息用于指示网络切换之后，保留QoS流或QoS流信息。
  14. 根据权利要求1中所述的方法，其中，所述保留部分无线资源或者全部无线资源包括：
    继续使用下行带宽部分BWP；
    根据下行控制信息DCI中的资源指示值RIV指示信息接收物理下行共享信道PDSCH发送的下行数据。
  15. 根据权利要求14所述的方法，其中，
    在满足
    Figure PCTCN2021087360-appb-100001
    的情况下，
    Figure PCTCN2021087360-appb-100002
    在不满足
    Figure PCTCN2021087360-appb-100003
    的情况下，
    Figure PCTCN2021087360-appb-100004
    其中，L CRBs为连续资源块RB的长度，
    Figure PCTCN2021087360-appb-100005
    为下行带宽的RB数，RB start为所述下行带宽中的起始资源块。
  16. 根据权利要求1中所述的方法，其中，所述保留部分无线资源或者全部无线资源包括：
    保留UE的小区无线网络临时标识C-RNTI，其中，所述UE的C-RNTI用于接收DCI信息。
  17. 根据权利要求1中所述的方法，其中，所述保留部分无线资源或者全部无线资源包括如下至少之一：
    保留物理上行控制信道PUCCH的资源分配方式；
    保留分配的PUCCH资源集合。
  18. 根据权利要求1中所述的方法，其中，所述保留部分无线资源或者全部无线资源包括：
    保留至少一个DRB；
    保留至少一个SRB；
    将SRB1或者SRB2中的一个修改为SRB3。
  19. 根据权利要求1中所述的方法，其中，所述保留部分无线资源或者全部无线资源包括：
    继续使用原有的PDU会话进行数据传输；
    或，在第一通信节点发起PDU会话后，重建并恢复数据连接。
  20. 根据权利要求1中所述的方法，其中，所述保留部分无线资源或者全部无线资源包括：
    使用网络切换前的安全上下文。
  21. 根据权利要求1中所述的方法，其中，所述保留部分无线资源或者全部无线资源包括：保留专用控制信道DCCH。
  22. 根据权利要求21中所述的方法，其中，所述保留DCCH包括：
    继续根据所述DCCH发送数据和接收数据。
  23. 根据权利要求1中所述的方法，其中，所述保留部分无线资源或者全部无线资源包括：保留部分QOS流或QOS流信息，或者保留全部QOS流或QOS流信息。
  24. 根据权利要求23中所述的方法，其中，所述保留QOS流或者QOS流信息包括：
    继续使用所述QOS流或QOS流信息进行用户面的数据发送和用户面的数据接收中的至少之一。
  25. 一种网络切换方法，所述方法应用于第二通信节点，包括：
    向第一通信节点发送第一消息，其中，所述第一消息中携带无线资源指示信息，所述无线资源指示信息用于指示网络切换后保留源小区的部分无线资源或者全部无线资源。
  26. 根据权利要25所述的方法，其中，所述第二通信节点是在源侧网络节点。
  27. 一种网络切换装置，所述装置配置于第一通信节点，包括：
    接收模块，被配置为接收第一消息，其中，所述第一消息中携带无线资源指示信息；
    保留模块，被配置为根据所述无线资源指示信息保留源小区的部分无线资源或者全部无线资源。
  28. 一种网络切换装置，所述装置配置于第二通信节点，包括：
    发送模块，被配置为向第一通信节点发送第一消息，其中，所述第一消息中携带无线资源指示信息，所述无线资源指示信息用于指示网络切换后保留源小区的部分无线资源或者全部无线资源。
  29. 一种设备，包括：
    至少一个处理器；
    存储器，被配置为存储至少一个程序；
    当所述至少一个程序被所述至少一个处理器执行时，使得所述至少一个处理器实现如权利要求1-26任一项所述的方法。
  30. 一种存储介质，所述存储介质存储有计算机程序，所述计算机程序被处理器执行时实现权利要求1-26任一项所述的方法。
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CN112512086A (zh) 2021-03-16

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