WO2020227946A1 - 切换接入网设备的方法、终端设备和网络设备 - Google Patents

切换接入网设备的方法、终端设备和网络设备 Download PDF

Info

Publication number
WO2020227946A1
WO2020227946A1 PCT/CN2019/086915 CN2019086915W WO2020227946A1 WO 2020227946 A1 WO2020227946 A1 WO 2020227946A1 CN 2019086915 W CN2019086915 W CN 2019086915W WO 2020227946 A1 WO2020227946 A1 WO 2020227946A1
Authority
WO
WIPO (PCT)
Prior art keywords
network device
access network
terminal device
source access
source
Prior art date
Application number
PCT/CN2019/086915
Other languages
English (en)
French (fr)
Inventor
尤心
Original Assignee
Oppo广东移动通信有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Oppo广东移动通信有限公司 filed Critical Oppo广东移动通信有限公司
Priority to CN201980090005.9A priority Critical patent/CN113348700A/zh
Priority to PCT/CN2019/086915 priority patent/WO2020227946A1/zh
Priority to EP19928446.4A priority patent/EP3958617A4/en
Priority to CN202111478727.7A priority patent/CN114125975B/zh
Priority to KR1020217040866A priority patent/KR20220006643A/ko
Publication of WO2020227946A1 publication Critical patent/WO2020227946A1/zh
Priority to US17/525,508 priority patent/US20220070747A1/en

Links

Images

Classifications

    • 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
    • H04W36/00837—Determination of triggering parameters for hand-off
    • 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
    • H04W36/0044—Control or signalling for completing the hand-off for data sessions of end-to-end connection with transfer of context information of quality context information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/34—Modification of an existing route
    • H04W40/36—Modification of an existing route due to handover
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/08—Arrangements for detecting or preventing errors in the information received by repeating transmission, e.g. Verdan system
    • 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
    • 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
    • H04W36/0077—Transmission or use of information for re-establishing the radio link of access 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
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/0085—Hand-off measurements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/16—Performing reselection for specific purposes
    • H04W36/18—Performing reselection for specific purposes for allowing seamless reselection, e.g. soft reselection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H04W36/305—Handover due to radio link failure
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/30—Connection release
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random access
    • H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
    • H04W74/0833—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure

Definitions

  • the embodiments of the application relate to the field of communications, and in particular to a method for switching access network equipment, terminal equipment, and network equipment.
  • the handover process in the existing Long Term Evolution (LTE) system is: the source access network device sends a handover request to the target access network device according to the measurement report reported by the terminal device, and after receiving the target access network device pair handover After the requested response, the switching command is sent to the terminal device.
  • the terminal device will reconfigure according to the switching command and release and disconnect the connection with the source access network device. At this time, the terminal device has not fully connected to the target connection. Access to the network equipment, resulting in the interruption of data interaction.
  • the embodiments of the present application provide a method for switching access network equipment, terminal equipment and network equipment, which reduce the interruption time of data transmission and reception while increasing the robustness of the handover.
  • a method for switching access network equipment includes: a terminal device initiates random access to a target access network device while maintaining a connection with a source access network device; After entering the target access network device and when the channel quality of the source access network device meets a preset condition, the terminal device releases the connection with the source access network device.
  • a method for switching access network equipment includes: after the terminal device maintains a connection with the source access network equipment and successfully accesses the target access network equipment, the network equipment receives auxiliary information, The network device is the source access network device or the target access network device; the network device sends response information of the auxiliary information, and the response information is used to instruct the terminal device to release the connection with the source Connection of access network equipment.
  • a terminal device for executing the method in the first aspect or its implementation manner.
  • the terminal device includes a functional module for executing the method in the foregoing first aspect or its implementation manner.
  • a network device for executing the method in the second aspect or its implementation manner.
  • the network device includes a functional module for executing the method in the foregoing second aspect or its implementation manner.
  • a terminal device including a processor and a memory.
  • the memory is used to store a computer program
  • the processor is used to call and run the computer program stored in the memory to execute the method in the first aspect or its implementation manner.
  • a network device including a processor and a memory.
  • the memory is used to store a computer program
  • the processor is used to call and run the computer program stored in the memory to execute the method in the second aspect or its implementation.
  • a chip is provided for implementing any one of the above-mentioned first aspect to the second aspect or the method in each implementation manner thereof.
  • the chip includes: a processor, configured to call and run a computer program from the memory, so that the device installed with the chip executes any one of the above-mentioned first aspect to the second aspect or any of the implementations thereof method.
  • a computer-readable storage medium for storing a computer program that enables a computer to execute any one of the first aspect to the second aspect or the method in each implementation manner thereof.
  • a computer program product including computer program instructions, which cause a computer to execute any one of the above-mentioned first aspect to the second aspect or the method in each implementation manner thereof.
  • a computer program which when running on a computer, causes the computer to execute any one of the above-mentioned first aspect to the second aspect or the method in each implementation manner thereof.
  • the terminal device after the terminal device successfully connects to the target access network device, it can release the connection with the source access network device based on the channel quality of the source access network device, which is beneficial to reduce the interruption time of data transmission and reception, and At the same time, the robustness of the handover is increased.
  • Fig. 1 is a schematic diagram of a communication system architecture provided by an embodiment of the present application.
  • Fig. 2 is a schematic diagram of a handover process provided by an embodiment of the present application.
  • Fig. 3 is a schematic diagram of a condition switching process provided by an embodiment of the present application.
  • FIG. 4 is a schematic block diagram of a method for switching access network equipment according to an embodiment of the present application.
  • FIG. 5 is a schematic flowchart of a method for switching access network equipment provided by an embodiment of the present application.
  • FIG. 6 is a schematic flowchart of a method for switching access network equipment provided by an embodiment of the present application.
  • FIG. 7 is a schematic flowchart of a method for switching access network equipment provided by an embodiment of the present application.
  • FIG. 8 is a schematic block diagram of a method for switching access network equipment provided by an embodiment of the present application.
  • FIG. 9 is a schematic block diagram of a terminal device provided by an embodiment of the present application.
  • FIG. 10 is a schematic block diagram of a network device provided by an embodiment of the present application.
  • FIG. 11 is a schematic block diagram of a communication device provided by an embodiment of the present application.
  • FIG. 12 is a schematic block diagram of a chip provided by an embodiment of the present application.
  • FIG. 13 is a schematic diagram of a communication system provided by an embodiment of the present application.
  • GSM Global System of Mobile Communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution LTE
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • UMTS Universal Mobile Telecommunication System
  • WiMAX Worldwide Interoperability for Microwave Access
  • NR New Radio
  • 5G System etc.
  • the technical solutions of the embodiments of the present application can be applied to various communication systems based on non-orthogonal multiple access technologies, such as sparse code multiple access (SCMA) systems, low-density signatures (Low Density Signature, LDS) system, etc.
  • SCMA sparse code multiple access
  • LDS Low Density Signature
  • SCMA system and LDS system can also be called other names in the communication field;
  • technical solutions of the embodiments of this application can be applied to multi-carriers using non-orthogonal multiple access technology Transmission systems, such as non-orthogonal multiple access technology Orthogonal Frequency Division Multiplexing (OFDM), Filter Bank Multi-Carrier (FBMC), Generalized Frequency Division Multiplexing (Generalized Frequency Division Multiplexing) Frequency Division Multiplexing (GFDM), Filtered-OFDM (F-OFDM) systems, etc.
  • OFDM Orthogonal Frequency Division Multiplexing
  • FBMC Filter Bank Multi-Carrier
  • Generalized Frequency Division Multiplexing Generalized Frequency Division Multiplexing
  • GFDM Frequency Division Multiplexing
  • F-OFDM Filtered-OFDM
  • the communication system 100 applied in the embodiment of the present application is shown in FIG. 1.
  • the communication system 100 may include a network device 110, and the network device 110 may be a device that communicates with a terminal device 120 (or called a communication terminal or terminal).
  • the network device 110 may provide communication coverage for a specific geographic area, and may communicate with terminal devices located in the coverage area.
  • the network device 110 may be a base station (Base Transceiver Station, BTS) in a GSM system or a CDMA system, a base station (NodeB, NB) in a WCDMA system, or an evolved base station in an LTE system (Evolutional Node B, eNB or eNodeB), or the wireless controller in the Cloud Radio Access Network (CRAN), or the network equipment can be a mobile switching center, a relay station, an access point, a vehicle-mounted device, Wearable devices, hubs, switches, bridges, routers, network devices gNB in 5G networks, or network devices in the future evolution of public land mobile networks (Public Land Mobile Network, PLMN), etc.
  • BTS Base Transceiver Station
  • NodeB, NB base station
  • LTE Long Term Evolutional Node B
  • eNB evolved base station
  • CRAN Cloud Radio Access Network
  • the network equipment can be a mobile switching center, a relay station, an access point, a vehicle-mounted device, Wearable devices
  • the communication system 100 also includes at least one terminal device 120 located within the coverage area of the network device 110.
  • terminal equipment includes but is not limited to User Equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile equipment, user terminal, Terminal, wireless communication equipment, user agent or user device.
  • UE User Equipment
  • the access terminal can be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, a personal digital processing (Personal Digital Assistant, PDA), with wireless communication Functional handheld devices, computing devices, or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in the future 5G network, or future evolution of the public land mobile network (Public Land Mobile Network, PLMN) Terminal equipment, etc., are not limited in the embodiment of the present invention.
  • SIP Session Initiation Protocol
  • WLL Wireless Local Loop
  • PDA Personal Digital Assistant
  • direct terminal connection (Device to Device, D2D) communication may be performed between the terminal devices 120.
  • the 5G system or 5G network may also be referred to as a New Radio (NR) system or NR network.
  • NR New Radio
  • Figure 1 exemplarily shows one network device and two terminal devices.
  • the communication system 100 may include multiple network devices and the coverage of each network device may include other numbers of terminal devices. The embodiment does not limit this.
  • the communication system 100 may also include other network entities such as a network controller and a mobility management entity, which are not limited in the embodiment of the present application.
  • network entities such as a network controller and a mobility management entity, which are not limited in the embodiment of the present application.
  • the devices with communication functions in the network/system in the embodiments of the present application may be referred to as communication devices.
  • the communication device may include a network device 110 and a terminal device 120 with communication functions, and the network device 110 and the terminal device 120 may be the specific devices described above, which will not be repeated here.
  • the communication device may also include other devices in the communication system 100, such as a mobility management entity (Mobility Management Entity, MME), a serving gateway (Serving Gateway, S-GW), or a packet data gateway (PDN Gateway, P-GW), etc. This is not limited in the embodiments of this application.
  • MME mobility management entity
  • S-GW serving gateway
  • PDN Gateway Packet Data Gateway
  • the handover process mainly includes the three processes of handover preparation, handover execution, and handover completion, which specifically includes some or all of the following steps:
  • the source eNB performs measurement configuration on the UE, and the measurement result of the UE will be used to assist the source eNB to make a handover decision.
  • S202 The UE performs measurement report according to the measurement configuration.
  • the source eNB refers to the measurement report result of the UE and makes a handover decision according to its own handover algorithm.
  • the source eNB sends a handover request message to the target eNB.
  • the message contains information related to handover preparation, including the UE’s X2 and S1 signaling context reference, target cell identifier, security key, and radio resource control (Radio Resource Control, RRC).
  • RRC Radio Resource Control
  • Context Context, access layer (Access Stratum, AS) configuration, Evolved-Universal Terrestrial Radio Access (E-UTRAN) Radio Access Bearer (E-UTRAN, Radio Access, Bearer, E) -RAB) Context etc.
  • E-UTRAN Evolved-Universal Terrestrial Radio Access
  • E-UTRAN Radio Access Bearer
  • E Radio Access, Bearer
  • E-RAB context includes necessary radio network layer (Radio Network Layer, RLN) and Transport Layer (Transport Network Layer, TNL) addressing information, and E-RAB quality of service (Quality of Service, QoS) information, etc.
  • Radio Network Layer RLN
  • Transport Layer Transport Layer
  • QoS Quality of Service
  • the target eNB performs admission control according to the received E-RAB QoS information to improve the success rate of handover. Admission control should consider reserving corresponding resources, cell radio network temporary identification (Cell Radio Network Temporary Identifier, C-RNTI), and assigning dedicated random access preamble codes.
  • C-RNTI Cell Radio Network Temporary Identifier
  • the AS configuration used by the target cell can be a complete configuration completely independent of the source cell, or it can be an incremental configuration based on the source cell (incremental configuration means that the same part is not configured, but only re-configured through signaling. With different parts, the UE will continue to use the original configuration for the configuration that has not been received).
  • the target eNB prepares for L1/L2 handover, and at the same time sends a handover request ACK message to the source eNB.
  • the message contains an RRC container, and the specific content is a handover command that triggers the UE to perform handover.
  • the source eNB handover command adopts a transparent transmission mode (without any modification) and sends it to the UE.
  • the handover command includes the new C-RNTI, the case algorithm identifier of the target eNB, and may also carry the special preamble code for random access, access parameters, system information, etc. If necessary, the handover request ACK message may also carry RNL/TNL information for data forwarding. After the source eNB receives the handover request ACK message or forwards the handover command to the UE, it can start data forwarding.
  • the handover command (the RRC connection reconfiguration message that carries the mobility control information) is generated by the target eNB, and transparently transmitted to the UE through the source eNB.
  • the source eNB performs necessary encryption and integrity protection on this message.
  • the UE receives the message, it will initiate the handover process using the relevant parameters in the message.
  • the UE does not need to wait for the Hybrid Automatic Repeat reQuest (HARQ)/Automatic Repeat reQuest (ARQ) response sent by the lower layer to the source eNB, and can initiate the handover process.
  • HARQ Hybrid Automatic Repeat reQuest
  • ARQ Automatic Repeat reQuest
  • the source eNB sends a sequence number (Sequence Number, SN) status transmission message to the target eNB, and transmits E-RAB uplink packet data convergence protocol (Packet Data Convergence Protocol, PDCP) SN reception status and downlink PDCP SN transmission status.
  • the uplink PDCP SN reception status includes at least the PDCP SN of the last uplink SDU received in sequence, and may also include the SN of the uplink SDU that caused the loss of the received disorder in the form of bit mapping (if there is such an SDU, These SDUs may require the UE to retransmit in the target cell).
  • the downlink PDCP SN transmission status indicates the next SDU sequence number that should be allocated at the target eNB. If no E-RAB needs to transmit the PDCP status report, the source eNB can omit this message.
  • the UE After receiving the handover command, the UE performs synchronization with the target cell. If the special preamble code for random access is configured in the handover command, it uses the non-contention random access procedure to access the target cell. If the special preamble code is not configured, Then use the competitive random access procedure to access the target cell. The UE calculates the key to be used at the target eNB and configures the security algorithm selected by the network for use at the target eNB, which is used to communicate with the target eNB after a successful handover.
  • S210 The network replies to the uplink resource allocation instruction and timing advance.
  • the UE After the UE successfully accesses the target cell, the UE sends an RRC connection reconfiguration complete message to confirm the completion of the handover process to the target eNB. If resources permit, the message may also be accompanied by an upstream buffer status report (Buffer Status Report, BSR) improvement.
  • BSR Buffer Status Report
  • the target eNB confirms the success of the handover by receiving the RRC connection reconfiguration complete message. At this point, the target eNB can start sending data to the UE.
  • the target eNB sends a path switch request message to the MME to inform the UE that the cell has been changed. At this time, the air interface handover has been successfully completed.
  • the MME sends a user plane update request message to the S-GW.
  • the S-GW switches the downlink data path to the target eNB side.
  • the S-GW sends one or more "end marker (end marker) packets" to the source eNB on the old path, and then can release the user plane resources of the source eNB.
  • the S-GW sends a user plane update response message to the MME.
  • S216 The MME sends a path switch request ACK message to the target eNB.
  • Steps 12-16 complete the path switching process, and the purpose of the process is to transfer the user plane data path from the source eNB to the target eNB.
  • the S-GW switches the downlink path, the downlink packets of the forward path and the new path may arrive alternately at the target eNB.
  • the target eNB should first deliver all forwarded data packets to the UE, and then deliver the packets received from the new path. Using this method at the target eNB can forcefully ensure the correct transmission sequence.
  • the S-GW immediately sends one or more "end marker packets" on the old path after the E-RAB switches the path.
  • the "end marker package” does not contain user data, which is indicated by the General Data Transfer Platform (GTP) header.
  • GTP General Data Transfer Platform
  • the S-GW should not send any data packets on the old path.
  • the source eNB should send this packet to the target eNB.
  • the target eNB should discard the "end marker packet” and initiate any necessary procedures to maintain the user's orderly delivery. These data are forwarded through the X2 port or transferred from the S-GW after the path is switched. Received through the S1 port.
  • the target eNB sends a UE context release message to the source eNB to notify the source eNB of the success of the handover and trigger the source eNB to release resources.
  • the target eNB sends this message after receiving the path switch ACK message sent back from the MME.
  • the source eNB may release the radio bearer and the control plane resources related to the UE context. Any ongoing data forwarding will continue.
  • Conditional handover avoids the problem that the handover preparation time is too long and the UE is too late to handover.
  • the UE’s operating trajectory is specific, so the source base station can allocate the target base station to the UE in advance, and the HO command contains the conditions for triggering the UE to switch. When the configured conditions are met, the UE Initiate an access request to the target base station.
  • Figure 3 shows a schematic diagram of part of the condition switching process.
  • the handover process corresponding to Fig. 2 is referred to as normal handover (normal HO) in this application.
  • S301 measurement report
  • the UE reports the measurement report to the source eNB.
  • This S301 can correspond to S201 and S202 in the normal handover process shown in Figure 2 above. For the sake of brevity, it is not here. Repeat it again.
  • handover preparation similar to the normal handover process, the handover preparation is performed between the source eNB and the target eNB.
  • the source eNB may perform handover preparation with one or more target eNBs.
  • the source eNB may send a handover request to one or more target eNBs.
  • the handover preparation steps performed between the source eNB and any target eNB in S302 can all correspond to S203 and S204 in the ordinary handover process shown in FIG. 2. For brevity, details are not described herein again.
  • S303. Handover command Multiple target cells or multiple target eNBs can be configured in the handover command sent by the source eNB to the UE.
  • conditions for the UE to perform handover can also be configured.
  • the handover conditions can include cell or beam Information such as the status of the UE, so that the UE can determine which target cell or target eNB to access based on the configured conditions.
  • S304 Random access is performed when the handover condition is met.
  • the UE determines whether the configured multiple target cells or target eNB meet the handover condition according to the configured condition, and performs random access when a certain target cell or target eNB meets the condition.
  • the UE will disconnect from the source eNB after receiving the handover command. After the UE initiates the random access to the target eNB, the data exchange will be interrupted. Based on the existing handover process, the embodiment of the application proposes that the terminal device continues to maintain the connection with the source access network device after receiving the handover command, and initiates random access to the target access network device until the terminal device successfully accesses The connection with the source access network device is released after reaching the target access network device. This scheme can effectively achieve the effect of reducing the interruption time during the handover process.
  • FIG. 4 shows a schematic block diagram of a method 400 for switching an access network device according to an embodiment of the present application. As shown in FIG. 4, the method 200 includes some or all of the following contents:
  • the terminal device initiates random access to the target access network device while maintaining the connection with the source access network device;
  • the terminal device can continue to maintain the connection with the source access network device, and initiate random access to the target access network device.
  • the connection with the source access network device can be released.
  • the connection with the source access network device may be released. For example, when the channel quality of the source access network device is so poor that the preset condition is met, the terminal device releases the connection with the source access network device.
  • the terminal device can monitor the channel quality of the source access network device.
  • the terminal device determines that the channel quality of the source access network device meets a preset condition
  • the terminal device actively releases the channel quality of the source access network device.
  • Device connection Then, at this time, the source access network device can determine based on the network implementation that the terminal device has released the connection with the source access network device.
  • the terminal device may also send auxiliary information to the network device (the source access network device and/or the target access network device), and the auxiliary information is used to indicate the channel quality of the source access network device.
  • the network device can only send response information to the terminal device when it determines that the channel quality of the source access network device meets the preset condition, so that the terminal device releases the connection with the source access network device.
  • the terminal device can also monitor the channel quality of the source access network device.
  • the terminal device determines that the channel quality of the source access network device meets the preset condition
  • the terminal device sends auxiliary information to the network device (The source access network device and/or target access network device), the auxiliary information is used to indicate that the channel quality of the source access network device meets the preset conditions, and then the network device will send the response information of the auxiliary information to the terminal device. After receiving the response information, the connection with the source access network device can be released.
  • the auxiliary information indicates that the channel quality of the source access network device satisfies the preset condition, which may be a direct indication or an indirect indication.
  • the auxiliary information is 1 bit, "0" indicates that the channel quality of the source access network device does not meet the preset condition, and "1" indicates that the channel quality of the source access network device meets the preset condition.
  • the auxiliary information may indirectly indicate that the channel condition of the source access network device meets the preset condition by indicating the channel quality of the source access network device.
  • the channel quality of the source access network device is carried in the auxiliary information, or, for example, the channel quality is divided into 5 levels.
  • a channel quality of a level lower than 3 indicates that the channel quality of the source access network device meets the preset condition
  • the level A channel quality higher than or equal to 3 indicates that the channel quality of the source access network device does not meet the preset condition.
  • the terminal device may determine that the channel quality of the source access network device meets the preset condition, or the network device may determine that the channel quality of the source access network device meets the preset condition.
  • a threshold value may be configured by the network device, which may be stored in the network device or in the terminal device.
  • the terminal device can measure the channel quality of the source access network device and compare the measurement result with the threshold value stored in the internal. If it is lower than the threshold value, the terminal device can consider the channel quality of the source access network device The quality meets the preset conditions. Or the terminal device can also send the measurement result obtained by measuring the channel quality of the source access network device to the network device, and the network device compares the measurement result with the threshold value stored in the internal storage.
  • the network device may consider that the channel quality of the source access network device meets the preset condition.
  • the terminal device can also determine that the link between it and the source access network device has a radio link failure (Radio Link Failure, RLF) to determine that the channel quality of the source access network device meets the preset condition.
  • RLF Radio Link Failure
  • the measurement results obtained by measuring the channel quality of the source access network equipment can be Reference Signal Received Power (RSRP), Reference Signal Received Quality (RSRQ), and Signal and Interference Plus.
  • RSRP Reference Signal Received Power
  • RSRQ Reference Signal Received Quality
  • SINR Signal and Interference Plus.
  • the threshold can be the threshold corresponding to at least one of RSRP, RSRQ, and SINR, and the unit can be dB or dBm .
  • the occurrence of RLF on the link between the terminal device and the source access network device may include at least one of the following situations: Radio Link Control (RLC) Automatic Repeat-reQuest (ARQ) ) The maximum number of retransmissions, the terminal device continuously receives multiple out-of-synchronization indications, and the timer T310/timer T312 expires.
  • RLC Radio Link Control
  • ARQ Automatic Repeat-reQuest
  • the terminal device may not release the connection with the source access network device until it determines When the channel quality of the source access network device is lower than the pre-configured threshold, the terminal device releases the connection with the source access network device. Or when the terminal device or network device determines that the channel quality of the source access network device is higher than or equal to the pre-configured threshold, a timer is started. Only when the timer expires, the terminal device releases the connection with the source access network. Device connection, etc.
  • the measurement performed on the source access network device by the terminal device before initiating random access to the target access network device and the measurement performed on the source access network device after the terminal device has successfully connected to the target access network device It may be based on the same or different parameters mentioned above, and the threshold value of the channel quality judged twice before and after may be the same or different, which is not limited in the embodiment of the present application.
  • the terminal device before the terminal device initiates random access to the target access network device, the terminal device receives a handover command sent by the source access network device, and the handover command indicates that the handover type is simultaneous Connection switching (simultaneous connectivity HO), that is, instructing the terminal device to switch from the source access network device to the target access network device while maintaining the connection with the source access network device.
  • the source access network device can also configure the measurement event of the source access network device channel quality monitoring to the terminal device.
  • the measurement event can be carried in the handover command, and the measurement event can include one or more target access networks. Threshold corresponding to the device.
  • the so-called handover type may include the aforementioned conditional handover, ordinary handover, and simultaneous connection handover, etc.
  • the ordinary handover may refer to a handover without any enhancement.
  • the ordinary handover may be a handover process as shown in FIG. 2;
  • the handover may be a handover process as shown in FIG. 3; however, the embodiments of the present application are mainly aimed at the scenario of simultaneous connection handover.
  • the handover type can also include other types, for example, it can also include: random access channel-less (RACH-LESS) handover; it can also include make before break (MBB) Switch. It may also include the handover that the UE performs HO execution (S304) while maintaining the connection of the source base station during conditional handover.
  • RACH-LESS random access channel-less
  • MBB make before break
  • the terminal device initiating random access to a target access network device configured in the handover command while maintaining the connection with the source access network device may include: reserving the source cell (corresponding to the source cell in the embodiment of this application) The protocol stack of the access network equipment, including the user plane radio bearer (Data Radio Bearer, DRB) and/or the Signaling Radio Bearer (SRB) reserved for the source cell; the establishment of the target cell (corresponding to the embodiment of this application) The protocol stack of the target access network equipment) includes the DRB and/or SRB of the target cell.
  • DRB Data Radio Bearer
  • SRB Signaling Radio Bearer
  • the terminal device successfully accesses the target access network device.
  • the terminal device may successfully receive the RAR or send the handover complete message (RRC reconfiguration complete message) ;
  • RRC reconfiguration complete message For contention-based random access (CBRA), the terminal device may successfully send a handover complete message (RRC reconfiguration complete message) or successfully receive a contention resolution message (contention resolution).
  • CBRA contention-based random access
  • the terminal device can initiate random access to the target access network device while maintaining the connection with the source access network device.
  • the terminal device can measure the channel quality of the source access network device, for example, perform radio link monitoring (Radio Link Monitor, RLM) or radio resource management (Radio Resource Management, RRM).
  • RLM Radio Link Monitor
  • RRM Radio Resource Management
  • the terminal device can actively release the connection with the source access network device.
  • the source access network device can determine based on the implementation that the terminal device has released the connection with the source access network device.
  • the terminal device can also send a packet data convergence protocol (Packet Data Convergence Protocol, PDCP) status report (status report) to the target access network device to inform the target access network device of the current downlink data
  • PDCP Packet Data Convergence Protocol
  • status report status report
  • the target access network device after the target access network device receives the PDCP status report, it can also notify the source access network device that the terminal device has released the connection with the source access network device, and the source access network device can send the PDCP status report to the target access network device.
  • the device sends data forwarding information (data forwarding), where the data forwarding may include downlink data packets that have not received correct feedback and/or data packets to be transmitted.
  • the terminal device can initiate random access to the target access network device while maintaining the connection with the source access network device, and the terminal device can successfully access After the target access network device, the terminal device can measure the channel quality of the source access network device, for example, perform RLM or RRM. When the channel quality measurement value (for example, RSRP) is lower than the pre-configured threshold value, the terminal device may send auxiliary information to the source access network device to indicate that the channel quality of the source access network device meets the preset condition.
  • the channel quality measurement value for example, RSRP
  • the terminal device may send auxiliary information to the source access network device to indicate that the channel quality of the source access network device meets the preset condition.
  • the source access network device can stop scheduling downlink data to the terminal device, and can also send response information of the auxiliary information to the terminal device, or the source access network device instructs the target access network device Send the response information of the auxiliary information to the terminal device, so that the terminal device releases the connection with the source access network device.
  • the source access network device may also send data forwarding to the target access network device, where the data forwarding may include downlink data packets that have not received correct feedback and/or data to be transmitted Data packets, etc.
  • the terminal device can release the connection with the source access network device, and can also send a PDCP status report to the target access network device.
  • the terminal device can initiate random access to the target access network device while maintaining the connection with the source access network device, and when the terminal device successfully accesses After the target access network device, the terminal device can measure the channel quality of the source access network device, for example, perform RLM or RRM.
  • the terminal device can send auxiliary information to the target access network device, and the target access network device instructs the source access network device to stop scheduling downlink data .
  • the target access network device can also send response information of auxiliary information to the terminal device, or instruct the source access network device to send response information of auxiliary information to the terminal device, so that the terminal device releases the connection with the source access network device, and the target
  • the access network device may also instruct the source access network device to send data forwarding to the target access network device, where the data forwarding may include downlink data packets that have not received correct feedback and data packets to be transmitted.
  • the terminal device After receiving the response information sent by the target access network device or the source access network device, the terminal device can release the connection with the source access network device, and can also send a PDCP status report to the target access network device.
  • the terminal device may initiate random access to the target access network device while maintaining the connection with the source access network device, and after the terminal device successfully accesses the target access network device ,
  • the terminal device can measure the channel quality of the source access network device, for example, perform RLM or RRM.
  • the terminal device can send auxiliary information to both the target access network device and the source access network device. If only one of the devices receives the auxiliary information sent by the terminal device, it can be executed with reference to the second embodiment and the third embodiment.
  • the target access network device and the source access network device both receive the auxiliary information sent by the terminal device, they can interact with each other, so that one of them sends response information of the auxiliary information to the terminal device.
  • the target access network device and the source access network device both receive the auxiliary information sent by the terminal device, they can interact with each other, so that one of them sends response information of the auxiliary information to the terminal device.
  • auxiliary information in the embodiments of the present application can be carried in radio resource control (Radio Resource Control, RRC) signaling, media access control (Media Access Control, MAC) control element (Control Element, CE) signaling, or In the uplink control information (Uplink Control Information, UCI).
  • RRC Radio Resource Control
  • MAC Media Access Control
  • CE Control Element
  • UCI Uplink Control Information
  • the terminal device receiving the response information of the auxiliary information and releasing the connection with the source access network device may be performed after the source access network device sends data forwarding to the target access network device.
  • the method for switching access network equipment in the embodiment of the present application releases the connection of the source access network equipment based on the channel quality of the source cell after successfully accessing the target access network equipment, so that the terminal equipment and the source access network equipment Synchronization is maintained when the connection is released, and based on the auxiliary information, the source cell can forward data to the target access network device in advance, which reduces the interruption time of data transmission and reception and increases the robustness of handover.
  • FIG. 8 shows a schematic block diagram of a method 500 for switching an access network device according to an embodiment of the present application. As shown in FIG. 8, the method 500 may include some or all of the following content:
  • S520 The network device sends response information of the auxiliary information, where the response information is used to instruct the terminal device to release the connection with the source access network device.
  • the source access network device may directly receive the auxiliary information sent by the terminal device, and the source access network device sends response information of the auxiliary information to instruct the terminal device to release the auxiliary information from the source access network device. Connection.
  • the target access network device may directly receive the auxiliary information sent by the terminal device, and the target access network device sends response information of the auxiliary information to instruct the terminal device to release the connection with the source access network device.
  • the source access network device may receive the auxiliary information sent by the terminal device, and the source access network device instructs the target access network device to send response information of the auxiliary information to the terminal device to instruct the terminal device to release and access the source Network equipment connection.
  • the target access network device may receive the auxiliary information sent by the terminal device, and the target access network device instructs the source access network device to send response information of the auxiliary information to the terminal device to instruct the terminal device to release and access the source Network equipment connection.
  • the receiving of the auxiliary information by the network device includes: when the terminal device determines that the channel quality of the source access network device meets a preset condition, the network device receiving the auxiliary information
  • the auxiliary information is used to indicate that the channel quality of the source access network device meets a preset condition.
  • the auxiliary information is used to indicate the channel quality of the source access network device, and the network device may determine that the channel quality of the source access network device meets a preset condition , Sending the response information of the auxiliary information to the terminal device.
  • the auxiliary information is used to indicate that the measured value of the channel quality of the source access network device is lower than a preset threshold.
  • the pre-configured threshold includes a threshold corresponding to at least one of the following parameters: reference signal received power RSRP, reference signal received quality RSRQ, and signal to interference plus noise ratio SINR.
  • the network device is the target access network device
  • the auxiliary information is used to indicate that a wireless link occurs between the terminal device and the source access network device. RLF failed.
  • the radio link failure RLF of the link between the terminal device and the source access network device includes at least one of the following situations: radio link control RLC automatic retransmission
  • the ARQ is requested to retransmit to the maximum number of times, the terminal device continuously receives multiple out-of-synchronization indications and T310/T312 timeout.
  • the network device is the source access network device
  • the method further includes: the source access network device stops downlink when receiving the auxiliary information Data scheduling and/or sending data forward information to the target access network device.
  • the network device is the target access network device
  • the method further includes: upon receiving the auxiliary information, the target access network device sends the The source access network device sends instruction information, where the instruction information is used to instruct the source access network device to stop scheduling of downlink data and/or send data forwarding information to the target access network device.
  • the network device is the target access network device
  • the method further includes: when the terminal device releases the connection with the source access network device, The target access network device receives a packet data convergence protocol PDCP status report sent by the terminal device.
  • the network device is the source access network device
  • the method further includes: before the terminal device initiates random access to the target access network device, The source access network device sends a switching command to the terminal device, and the switching command is used to instruct the terminal device to access the network device from the source access network device while maintaining the connection with the source access network device Switch to the target access network device.
  • the handover command includes a measurement event of channel quality monitoring of the source access network device.
  • the auxiliary information is carried in radio resource control RRC signaling, medium access control MAC control element CE signaling, or uplink control information UCI.
  • the size of the sequence number of the above-mentioned processes does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, rather than corresponding to the embodiments of the present application.
  • the implementation process constitutes any limitation.
  • FIG. 9 shows a schematic block diagram of a terminal device 600 according to an embodiment of the present application.
  • the terminal device 600 includes:
  • the transceiving unit 610 is configured to initiate random access to the target access network device while maintaining the connection with the source access network device;
  • the processing unit 620 is configured to release the connection with the source access network device after successfully accessing the target access network device and when the channel quality of the source access network device meets a preset condition.
  • the processing unit is further configured to: after successfully accessing the target access network device, determine that the channel quality of the source access network device meets a preset condition;
  • the transceiving unit is further configured to: send auxiliary information to the source access network device and/or the target access network device, where the auxiliary information is used to indicate that the channel quality of the source access network device meets a preset condition Receiving the response information of the auxiliary information, the response information is used to instruct the terminal device to release the connection with the source access network device; the processing unit is specifically configured to: release the connection with the source access network device according to the response information The connection of the source access network equipment.
  • the processing unit is specifically configured to determine that the measured value of the channel quality of the access network device is lower than a preset threshold.
  • the pre-configured threshold includes a threshold corresponding to at least one of the following parameters: reference signal received power RSRP, reference signal received quality RSRQ, and signal to interference plus noise ratio SINR.
  • the processing unit is specifically configured to determine that a radio link failure RLF occurs in the link between the terminal device and the source access network device.
  • the occurrence of RLF on the link between the terminal device and the source access network device includes at least one of the following situations: radio link control RLC self-retransmission request ARQ retransmission
  • the terminal device continuously receives multiple out-of-synchronization indications and the timer T310/timer T312 expires.
  • the transceiving unit is further configured to send packet data to the target access network device when the processing unit releases the connection with the source access network device Convergence protocol PDCP status report.
  • the transceiving unit is further configured to: before initiating random access to the target access network device, receive a handover command, where the handover command is used to instruct the terminal device to Switching from the source access network device to the target access network device while maintaining the connection with the source access network device.
  • the handover command includes a measurement event of channel quality monitoring of the source access network device.
  • the auxiliary information is carried in radio resource control RRC signaling, medium access control MAC control element CE signaling, or uplink control information UCI.
  • the terminal device of the embodiment of the present application releases the connection of the source access network device based on the channel quality of the source cell after successfully accessing the target access network device, so that when the terminal device and the source access network device release the connection Synchronization is maintained, and based on the auxiliary information, the source cell can forward data to the target access network device in advance, which reduces the interruption time of data transmission and reception and increases the robustness of handover.
  • terminal device 600 may correspond to the terminal device in the method embodiment of the present application, and the above-mentioned and other operations and/or functions of each unit in the terminal device 600 are to implement the terminal device in the method of FIG.
  • the corresponding process of the equipment will not be repeated here.
  • FIG. 10 shows a schematic block diagram of a network device 700 according to an embodiment of the present application.
  • the network device 700 includes:
  • the transceiver unit 710 is configured to receive auxiliary information after the terminal device maintains the connection with the source access network device and successfully connects to the target access network device, the network device being the source access network device or the target access network device Access network equipment;
  • the transceiving unit 710 is further configured to send response information of the auxiliary information, where the response information is used to instruct the terminal device to release the connection with the source access network device.
  • the transceiving unit is specifically configured to: when the terminal device determines that the channel quality of the source access network device meets a preset condition, receive the auxiliary information, and The auxiliary information is used to indicate that the channel quality of the source access network device meets a preset condition.
  • the auxiliary information is used to indicate that the measured value of the channel quality of the source access network device is lower than a preset threshold.
  • the pre-configured threshold includes a threshold corresponding to at least one of the following parameters: reference signal received power RSRP, reference signal received quality RSRQ, and signal to interference plus noise ratio SINR.
  • the network device is the target access network device
  • the auxiliary information is used to indicate that a wireless link occurs between the terminal device and the source access network device. RLF failed.
  • the radio link failure RLF of the link between the terminal device and the source access network device includes at least one of the following situations: radio link control RLC automatic retransmission
  • the ARQ is requested to retransmit to the maximum number of times, the terminal device continuously receives multiple out-of-synchronization indications and T310/T312 timeout.
  • the network device is the source access network device, and the network device further includes: a processing unit, configured to: when the transceiving unit receives the auxiliary information , Stopping the scheduling of downlink data, and/or the transceiving unit is further configured to: in the case that the transceiving unit receives the auxiliary information, send data forwarding information to the target access network device.
  • a processing unit configured to: when the transceiving unit receives the auxiliary information , Stopping the scheduling of downlink data, and/or the transceiving unit is further configured to: in the case that the transceiving unit receives the auxiliary information, send data forwarding information to the target access network device.
  • the network device is the target access network device
  • the transceiving unit is further configured to: upon receiving the auxiliary information, access the network to the source
  • the device sends instruction information, where the instruction information is used to instruct the source access network device to stop scheduling of downlink data and/or send data forwarding information to the target access network device.
  • the network device is the target access network device
  • the transceiving unit is further configured to: when the terminal device releases the connection with the source access network device Next, receiving the PDCP status report sent by the terminal device.
  • the network device is the source access network device
  • the transceiving unit is further configured to: before the terminal device initiates random access to the target access network device Send a handover command to the terminal device, where the handover command is used to instruct the terminal device to switch from the source access network device to the target while maintaining the connection with the source access network device Access network equipment.
  • the handover command includes a measurement event of channel quality monitoring of the source access network device.
  • the auxiliary information is carried in radio resource control RRC signaling, medium access control MAC control element CE signaling, or uplink control information UCI.
  • the network device 700 may correspond to the source access network device or the target access network device in the method embodiment of the present application, and the foregoing and other operations and/or operations of each unit in the network device 700 The functions are respectively to implement the corresponding process of the network device in the method in FIG. 8, and for the sake of brevity, details are not described here.
  • FIG. 11 is a schematic structural diagram of a communication device 800 provided by an embodiment of the present application.
  • the communication device 800 shown in FIG. 11 includes a processor 810, and the processor 810 can call and run a computer program from a memory to implement the method in the embodiment of the present application.
  • the communication device 800 may further include a memory 820.
  • the processor 810 can call and run a computer program from the memory 820 to implement the method in the embodiment of the present application.
  • the memory 820 may be a separate device independent of the processor 810, or may be integrated in the processor 810.
  • the communication device 800 may further include a transceiver 830, and the processor 810 may control the transceiver 830 to communicate with other devices. Specifically, it may send information or data to other devices, or receive other devices. Information or data sent by the device.
  • the transceiver 830 may include a transmitter and a receiver.
  • the transceiver 830 may further include an antenna, and the number of antennas may be one or more.
  • the communication device 800 may specifically be a network device (a source access network device or a target access network device) according to an embodiment of the application, and the communication device 800 may implement the network device
  • a network device a source access network device or a target access network device
  • the communication device 800 may implement the network device
  • the communication device 800 may specifically be a mobile terminal/terminal device of an embodiment of the present application, and the communication device 800 may implement the corresponding process implemented by the mobile terminal/terminal device in each method of the embodiment of the present application. For simplicity , I won’t repeat it here.
  • FIG. 12 is a schematic structural diagram of a chip of an embodiment of the present application.
  • the chip 900 shown in FIG. 12 includes a processor 910, and the processor 910 can call and run a computer program from the memory to implement the method in the embodiment of the present application.
  • the chip 900 may further include a memory 920.
  • the processor 910 may call and run a computer program from the memory 920 to implement the method in the embodiment of the present application.
  • the memory 920 may be a separate device independent of the processor 910, or may be integrated in the processor 910.
  • the chip 900 may further include an input interface 930.
  • the processor 910 can control the input interface 930 to communicate with other devices or chips, and specifically, can obtain information or data sent by other devices or chips.
  • the chip 900 may further include an output interface 940.
  • the processor 910 can control the output interface 940 to communicate with other devices or chips, and specifically, can output information or data to other devices or chips.
  • the chip can be applied to the network device in the embodiment of the present application, and the chip can implement the corresponding process implemented by the network device in the various methods of the embodiment of the present application.
  • the chip can implement the corresponding process implemented by the network device in the various methods of the embodiment of the present application.
  • the chip can be applied to the mobile terminal/terminal device in the embodiment of the present application, and the chip can implement the corresponding process implemented by the mobile terminal/terminal device in each method of the embodiment of the present application.
  • the chip can implement the corresponding process implemented by the mobile terminal/terminal device in each method of the embodiment of the present application.
  • the chip can implement the corresponding process implemented by the mobile terminal/terminal device in each method of the embodiment of the present application.
  • the chip can be applied to the mobile terminal/terminal device in the embodiment of the present application, and the chip can implement the corresponding process implemented by the mobile terminal/terminal device in each method of the embodiment of the present application.
  • the chip can be applied to the mobile terminal/terminal device in the embodiment of the present application, and the chip can implement the corresponding process implemented by the mobile terminal/terminal device in each method of the embodiment of the present application.
  • the chip can implement the corresponding process implemented by the mobile terminal/terminal device in each method of the embodiment of the present application.
  • the chip mentioned in the embodiment of the present application may also be referred to as a system-level chip, a system-on-chip, a system-on-chip, or a system-on-chip, etc.
  • FIG. 13 is a schematic block diagram of a communication system 1000 according to an embodiment of the present application. As shown in FIG. 13, the communication system 1000 includes a terminal device 1010 and a network device 1020.
  • the terminal device 1010 can be used to implement the corresponding function implemented by the terminal device in the above method
  • the network device 1020 can be used to implement the corresponding function implemented by the network device in the above method. For the sake of brevity, it will not be omitted here. Repeat.
  • the processor of the embodiment of the present application may be an integrated circuit chip with signal processing capability.
  • the steps of the foregoing method embodiments can be completed by hardware integrated logic circuits in the processor or instructions in the form of software.
  • the aforementioned processor may be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (ASIC), a ready-made programmable gate array (Field Programmable Gate Array, FPGA) or other Programming logic devices, discrete gates or transistor logic devices, discrete hardware components.
  • DSP Digital Signal Processor
  • ASIC application specific integrated circuit
  • FPGA ready-made programmable gate array
  • the methods, steps, and logical block diagrams disclosed in the embodiments of the present application can be implemented or executed.
  • the general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like.
  • the steps of the method disclosed in the embodiments of the present application may be directly embodied as being executed and completed by a hardware decoding processor, or executed and completed by a combination of hardware and software modules in the decoding processor.
  • the software module can be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, registers.
  • the storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.
  • the memory in the embodiment of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), and electrically available Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory.
  • the volatile memory may be a random access memory (Random Access Memory, RAM), which is used as an external cache.
  • RAM random access memory
  • SRAM static random access memory
  • DRAM dynamic random access memory
  • DRAM synchronous dynamic random access memory
  • SDRAM double data rate synchronous dynamic random access memory
  • Double Data Rate SDRAM DDR SDRAM
  • ESDRAM enhanced synchronous dynamic random access memory
  • Synchlink DRAM SLDRAM
  • DR RAM Direct Rambus RAM
  • the memory in the embodiment of the present application may also be static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), Synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection Dynamic random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM), etc. That is to say, the memory in the embodiment of the present application is intended to include but not limited to these and any other suitable types of memory.
  • the embodiment of the present application also provides a computer-readable storage medium for storing computer programs.
  • the computer-readable storage medium may be applied to the network device in the embodiment of the present application, and the computer program causes the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application.
  • the computer program causes the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application.
  • the computer-readable storage medium can be applied to the terminal device in the embodiment of the present application, and the computer program causes the computer to execute the corresponding process implemented by the mobile terminal/terminal device in each method of the embodiment of the present application, for the sake of brevity , I won’t repeat it here.
  • the embodiments of the present application also provide a computer program product, including computer program instructions.
  • the computer program product may be applied to the network device in the embodiment of the present application, and the computer program instructions cause the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application.
  • the computer program instructions cause the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application.
  • the computer program instructions cause the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application.
  • the computer program product can be applied to the terminal device in the embodiment of this application, and the computer program instructions cause the computer to execute the corresponding process implemented by the mobile terminal/terminal device in each method of the embodiment of this application.
  • the computer program instructions cause the computer to execute the corresponding process implemented by the mobile terminal/terminal device in each method of the embodiment of this application.
  • I will not repeat them here.
  • the embodiment of the present application also provides a computer program.
  • the computer program can be applied to the network device in the embodiment of the present application.
  • the computer program runs on the computer, the computer is caused to execute the corresponding process implemented by the network device in each method of the embodiment of the present application.
  • I won’t repeat it here.
  • the computer program can be applied to the terminal device in the embodiment of the present application.
  • the computer program runs on the computer, it causes the computer to execute the corresponding process implemented by the terminal device in each method of the embodiment of the present application.
  • I won’t repeat it here.
  • the disclosed system, device, and method may be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components can be combined or It can be integrated into another system, or some features can be ignored or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
  • each unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium.
  • the technical solution of this application essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in each embodiment of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory,) ROM, random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program code .

Abstract

本申请实施例公开了一种切换接入网设备的方法、终端设备和网络设备，该方法包括：终端设备在保持与源接入网设备的连接的情况下，向目标接入网设备发起随机接入；在成功接入到所述目标接入网设备后并且在所述源接入网设备的信道质量满足预设条件时，所述终端设备释放与所述源接入网设备的连接。本申请实施例的方法、终端设备和网络设备，有利于减少数据收发的中断时间同时增加切换的鲁棒性。

Description

切换接入网设备的方法、终端设备和网络设备 技术领域
本申请实施例涉及通信领域，具体涉及一种切换接入网设备的方法、终端设备和网络设备。
背景技术
现有长期演进(Long Term Evolution，LTE)系统中的切换流程为：源接入网设备根据终端设备上报的测量报告向目标接入网设备发送切换请求，在接收到目标接入网设备对切换请求的响应之后，再向终端设备发送切换命令，终端设备会根据切换命令进行重配置并且会释放断开与源接入网设备的连接，而此时，终端设备还没有完全接入到目标接入网设备，从而导致数据交互的中断。
发明内容
本申请实施例提供一种切换接入网设备的方法、终端设备和网络设备，减少了数据收发的中断时间同时增加切换的鲁棒性。
第一方面，提供了一种切换接入网设备的方法，该方法包括：终端设备在保持与源接入网设备的连接的情况下，向目标接入网设备发起随机接入；在成功接入到所述目标接入网设备后并且在所述源接入网设备的信道质量满足预设条件时，所述终端设备释放与所述源接入网设备的连接。
第二方面，提供了一种切换接入网设备的方法，该方法包括：在终端设备保持与源接入网设备的连接且成功接入到目标接入网设备后，网络设备接收辅助信息，所述网络设备为所述源接入网设备或所述目标接入网设备；所述网络设备发送所述辅助信息的响应信息，所述响应信息用于指示所述终端设备释放与所述源接入网设备的连接。
第三方面，提供了一种终端设备，用于执行上述第一方面或其实现方式中的方法。
具体地，该终端设备包括用于执行上述第一方面或其实现方式中的方法的功能模块。
第四方面，提供了一种网络设备，用于执行上述第二方面或其实现方式中的方法。
具体地，该网络设备包括用于执行上述第二方面或其实现方式中的方法的功能模块。
第五方面，提供了一种终端设备，包括处理器和存储器。该存储器用于存储计算机程序，该处理器用于调用并运行该存储器中存储的计算机程序，执行上述第一方面或其实现方式中的方法。
第六方面，提供了一种网络设备，包括处理器和存储器。该存储器用于存储计算机程序，该处理器用于调用并运行该存储器中存储的计算机程序，执行上述第二方面或其实现方式中的方法。
第七方面，提供了一种芯片，用于实现上述第一方面至第二方面中的任一方面或其各实现方式中的方法。
具体地，该芯片包括：处理器，用于从存储器中调用并运行计算机程序，使得安装有该芯片的设备执行如上述第一方面至第二方面中的任一方面或其各实现方式中的方法。
第八方面，提供了一种计算机可读存储介质，用于存储计算机程序，该计算机程序使得计算机执行上述第一方面至第二方面中的任一方面或其各实现方式中的方法。
第九方面，提供了一种计算机程序产品，包括计算机程序指令，该计算机程序指令使得计算机执行上述第一方面至第二方面中的任一方面或其各实现方式中的方法。
第十方面，提供了一种计算机程序，当其在计算机上运行时，使得计算机执行上述第一方面至第二方面中的任一方面或其各实现方式中的方法。
通过上述技术方案，终端设备在成功接入到目标接入网设备之后，可以基于源接入网设备的信道质量来释放与源接入网设备的连接，有利于减少数据收发的中断时间，并且同时增加了切换的鲁棒性。
本申请的这些方面或其他方面在以下实施例的描述中会更加简明易懂。
附图说明
图1是本申请实施例提供的一种通信系统架构的示意性图。
图2是本申请实施例提供的一种切换流程的示意性图。
图3是本申请实施例提供的一种条件切换流程的示意性图。
图4是本申请实施例提供的一种切换接入网设备的方法的示意性框图。
图5是本申请实施例提供的一种切换接入网设备的方法的示意性流程图。
图6是本申请实施例提供的一种切换接入网设备的方法的示意性流程图。
图7是本申请实施例提供的一种切换接入网设备的方法的示意性流程图。
图8是本申请实施例提供的一种切换接入网设备的方法的示意性框图。
图9是本申请实施例提供的一种终端设备的示意性框图。
图10是本申请实施例提供的一种网络设备的示意性框图。
图11是本申请实施例提供的一种通信设备的示意性框图。
图12是本申请实施例提供的一种芯片的示意性框图。
图13是本申请实施例提供的一种通信系统的示意性图。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行描述，显然，所描述的实施例是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
应理解，本申请实施例的技术方案可以应用于各种通信系统，例如：全球移动通讯(Global System of Mobile communication，GSM)系统、码分多址(Code Division Multiple Access，CDMA)系统、宽带码分多址(Wideband Code Division Multiple Access，WCDMA)系统、通用分组无线业务(General Packet Radio Service，GPRS)、长期演进LTE系统、LTE频分双工(Frequency Division Duplex，FDD)系统、LTE时分双工(Time Division Duplex，TDD)、通用移动通信系统(Universal Mobile Telecommunication System，UMTS)、全球互联微波接入(Worldwide Interoperability for Microwave Access，WiMAX)通信系统、新无线(New Radio，NR)或未来的5G系统等。
特别地，本申请实施例的技术方案可以应用于各种基于非正交多址接入技术的通信系统，例如稀疏码多址接入(Sparse Code Multiple Access，SCMA)系统、低密度签名(Low Density Signature，LDS)系统等，当然SCMA系统和LDS系统在通信领域也可以被称为其他名称；进一步地，本申请实施例的技术方案可以应用于采用非正交多址接入技术的多载波传输系统，例如采用非正交多址接入技术正交频分复用(Orthogonal Frequency Division Multiplexing，OFDM)、滤波器组多载波(Filter Bank Multi-Carrier，FBMC)、通用频分复用(Generalized Frequency Division Multiplexing，GFDM)、滤波正交频分复用(Filtered-OFDM，F-OFDM)系统等。
示例性的，本申请实施例应用的通信系统100如图1所示。该通信系统100可以包括网络设备110，网络设备110可以是与终端设备120(或称为通信终端、终端)通信的设备。网络设备110可以为特定的地理区域提供通信覆盖，并且可以与位于该覆盖区域内的终端设备进行通信。可选地，该网络设备110可以是GSM系统或CDMA系统中的 基站(Base Transceiver Station，BTS)，也可以是WCDMA系统中的基站(NodeB，NB)，还可以是LTE系统中的演进型基站(Evolutional Node B，eNB或eNodeB)，或者是云无线接入网络(Cloud Radio Access Network，CRAN)中的无线控制器，或者该网络设备可以为移动交换中心、中继站、接入点、车载设备、可穿戴设备、集线器、交换机、网桥、路由器、5G网络中的网络设备gNB或者未来演进的公共陆地移动网络(Public Land Mobile Network，PLMN)中的网络设备等。
该通信系统100还包括位于网络设备110覆盖范围内的至少一个终端设备120。作为在此使用的“终端设备”包括但不限于用户设备(User Equipment，UE)、接入终端、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、终端、无线通信设备、用户代理或用户装置。接入终端可以是蜂窝电话、无绳电话、会话启动协议(Session Initiation Protocol，SIP)电话、无线本地环路(Wireless Local Loop，WLL)站、个人数字处理(Personal Digital Assistant，PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备，未来5G网络中的终端设备或者未来演进的公用陆地移动通信网络(Public Land Mobile Network，PLMN)中的终端设备等，本发明实施例并不限定。
可选地，终端设备120之间可以进行终端直连(Device to Device，D2D)通信。
可选地，5G系统或5G网络还可以称为新无线(New Radio，NR)系统或NR网络。
图1示例性地示出了一个网络设备和两个终端设备，可选地，该通信系统100可以包括多个网络设备并且每个网络设备的覆盖范围内可以包括其它数量的终端设备，本申请实施例对此不做限定。
可选地，该通信系统100还可以包括网络控制器、移动管理实体等其他网络实体，本申请实施例对此不作限定。
应理解，本申请实施例中网络/系统中具有通信功能的设备可称为通信设备。以图1示出的通信系统100为例，通信设备可包括具有通信功能的网络设备110和终端设备120，网络设备110和终端设备120可以为上文所述的具体设备，此处不再赘述；通信设备还可包括通信系统100中的其他设备，例如移动性管理实体(Mobility Management Entity，MME)，服务网关(Serving Gateway，S-GW)或分组数据网关(PDN Gateway，P-GW)等，本申请实施例中对此不做限定。
应理解，本文中术语“系统”和“网络”在本文中常被可互换使用。本文中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
为了便于理解，下面将结合图2详细描述一下现有LTE系统中的切换流程。如图2所示，该切换流程主要包括切换准备、执行切换以及切换完成这三个过程，具体包括以下部分或全部步骤：
S201，源eNB对UE进行测量配置，UE的测量结果将用于辅助源eNB进行切换判决。
S202，UE根据测量配置，进行测量上报。
S203，源eNB参考UE的测量上报结果，根据自身的切换算法，进行切换判决。
S204，源eNB向目标eNB发送切换请求消息，该消息包含切换准备的相关信息，主要有UE的X2和S1信令上下文参考、目标小区标识、安全秘钥、无线资源控制(Radio Resource Control，RRC)上下文、接入层(Access Stratum,AS)配置、演进的通用移动通信系统陆地无线接入网(Evolved-Universal Terrestrial Radio Access，E-UTRAN)无线接入承载(E-UTRAN Radio Access Bearer，E-RAB)上下文等。同时也包含源小区物理层标识和消息鉴权验证码，用于可能的切换失败后的恢复过程。UE的X2和S1信令上下文参考可以 帮助目标eNB找到源eNB的位置。E-RAB上下文包括必要的无线网络层(Radio Network Layer，RLN)和传输层(Transport Network Layrer，TNL)寻址信息以及E-RAB的服务质量(Quality of Service，QoS)信息等。
S205：目标eNB根据收到的E-RAB QoS信息进行接纳控制，以提高切换的成功率。接纳控制要考虑预留相应的资源、小区无线网络临时标识(Cell Radio Network Temporary Identifier，C-RNTI)以及分配专用随机接入Preamble码等。目标小区所使用的AS配置可以是完全独立于源小区的完全配置，也可以是在源小区基础之上的增量配置(增量配置是指对相同的部分不进行配置，只通过信令重配不同的部分，UE对于没有收到的配置，将继续使用原配置)。
S206：目标eNB进行L1/L2的切换准备，同时向源eNB发送切换请求ACK消息。该消息中包含一个RRC容器，具体内容是触发UE进行切换的切换命令。源eNB切换命令采用透传的方式(不做任何修改)，发送给UE。切换命令中包含新的C-RNTI、目标eNB的案例算法标识，有可能还携带随机接入专用Preamble码、接入参数、系统信息等。如果有必要，切换请求ACK消息中还有可能携带RNL/TNL信息，用于数据前转。当源eNB收到切换请求ACK消息或者是向UE转发了切换命令之后，就可以开始数据前转了。
S207：切换命令(携带了移动性控制信息的RRC连接重配置消息)是由目标eNB生成的，通过源eNB将其透传给UE。源eNB对这条消息进行必要的加密和完整性保护。当UE收到该消息之后，就会利用该消息中的相关参数发起切换过程。UE不需要等待低层向源eNB发送的混合自动重传请求(Hybrid Automatic Repeat reQuest，HARQ)/自动重传请求(Automatic Repeat reQuest，ARQ)响应，就可以发起切换过程。
S208：源eNB发送序列号(Sequence Number，SN)状态传输消息到目标eNB，传送E-RAB的上行分组数据汇聚协议(Packet Data Convergence Protocol，PDCP)SN接收状态和下行PDCP SN发送状态。上行PDCP SN接收状态至少包含了按序接收的最后一个上行SDU的PDCP SN，也可能包含以比特映射的形式表示的那些造成接收乱序的丢失的上行SDU的SN(如果有这样的SDU的话，这些SDU可能需要UE在目标小区进行重传)。下行PDCP SN发送状态指示了在目标eNB应该分配的下一个SDU序号。如果没有E-RAB需要传送PDCP的状态报告，源eNB可以省略这条消息。
S209：UE收到切换命令以后，执行与目标小区的同步，如果在切换命令中配置了随机接入专用Preamble码，则使用非竞争随机接入流程接入目标小区，如果没有配置专用Preamble码，则使用竞争随机接入流程接入目标小区。UE计算在目标eNB所需使用的密钥并配置网络选择好的在目标eNB使用的安全算法，用于切换成功之后与目标eNB进行通信。
S210：网络回复上行资源分配指示和定时提前。
S211：当UE成功接入目标小区后，UE发送RRC连接重配置完成消息，向目标eNB确认切换过程完成。如果资源允许，该消息也可能伴随着一个上行缓存状态报告(Buffer Status Report，BSR)的改善。目标eNB通过接收RRC连接重配置完成消息，确认切换成功。至此，目标eNB可以开始向UE发送数据。
S212：目标eNB向MME发送一个路径转换请求消息来告知UE更换了小区。此时空口的切换已经成功完成。
S213：MME向S-GW发送用户平面更新请求消息。
S214：S-GW将下行数据路径切换到目标eNB侧。S-GW在旧路径上发送一个或多个“结束标识(end marker)包”到源eNB，然后就可以释放源eNB的用户平面资源。
S215：S-GW向MME发送用户平面更新响应消息。
S216：MME向目标eNB发送路径转换请求ACK消息。步骤12～16就完成了路径转换过程，该过程的目的是将用户平面的数据路径从源eNB转到目标eNB。在S-GW转 换了下行路径以后，前转路径和新路径的下行包在目标eNB可能会交替到达。目标eNB应该首先传递所有的前转数据包给UE，然后再传递从新路径接收的包。在目标eNB使用这一方法可以强制性保证正确的传输顺序。为了辅助在目标eNB的重排功能，S-GW在E-RAB转换路径以后，立即在旧路径发送一个或者多个“end marker包”。“end marker包”内不含用户数据，由通用数据传输平台(General Data Transfer Platform，GTP)头指示。在完成发送含有标志符的包以后，S-GW不应该在旧路径发送任何数据包。在收到“end marker包”以后，如果前转对这个承载是激活的，源eNB应该将此包发送给目标eNB。在察觉了“end marker包”以后，目标eNB应该丢弃“end marker包”并发起任何必要的流程来维持用户的按序递交，这些数据是通过X2口前转的或者路径转换以后从S-GW通过S1口接收的。
S217：目标eNB向源eNB发送UE上下文释放消息，通知源eNB切换的成功并触发源eNB的资源释放。目标eNB在收到从MME发回的路径转换ACK消息以后发送这条消息。
S218：收到UE上下文释放消息之后，源eNB可以释放无线承载和与UE上下文相关的控制平面资源。任何正在进行的数据前传(data forwarding)将继续进行。
然而，对于某些特殊场景，比如UE高速移动或者高频条件下，需要UE频繁的进行切换(handover，HO)，因此，提出了一种新的切换流程，即条件切换(Conditional handover)。条件切换避免了切换准备时间过长，导致UE要切换的时候已经过晚的问题，可以为UE提前配置HO命令(command)。另一方面，对于高铁场景，UE的运行轨迹是特定的，所以源基站可以提前把目标基站配给UE，并且在HO command中包含用于触发UE进行切换的条件，当满足所配条件时，UE向目标基站发起接入请求。
具体地，3GPP RAN2#104次会议已经同意了这种条件切换，并且支持在条件切换的流程中的HO command中配置多个目标小区。例如，图3示出了部分条件切换过程的示意图。为了与上述图2中所示的切换区别，本申请中将上述图2对应的切换过程称为普通切换(normal HO)。
如图3所示，S301，测量报告，与普通切换过程类似，UE向源eNB上报测量报告，该S301可以对应上述图2示出的普通切换过程中的S201和S202，为了简洁，在此不再赘述。
S302，切换准备，与普通切换过程类似，源eNB与目标eNB之间执行切换准备。具体地，源eNB可以与一个或者多个目标eNB之间执行切换准备，例如，源eNB可以向一个或者多个目标eNB发送切换请求。其中，对于该S302中源eNB与任意一个目标eNB之间执行的切换准备步骤均可以对应上述图2示出的普通切换过程中的S203和S204，为了简洁，在此不再赘述。
S303，切换命令，源eNB向UE发送的切换命令中可以配置多个目标小区或多个目标eNB.可选的，还可以配置该UE执行切换的条件，例如该切换的条件可以包括小区或者波束的状态等信息，以便于UE基于所配置的条件(condition)判断接入哪个目标小区或目标eNB。
S304，满足切换条件时，随机接入。UE根据所配置的条件(condition)，确定配置的多个目标小区或目标eNB是否满足切换条件，并在某个目标小区或者目标eNB满足条件的情况下，执行随机接入。
目前，UE在接收到切换命令之后就会断开与源eNB的连接，在UE向目标eNB发起随机接入到成功接入的这个过程，数据交互会出现中断。基于现有的切换流程，本申请实施例提出了终端设备在接收到切换命令之后继续保持和源接入网设备的连接，并向目标接入网设备发起随机接入，直到终端设备成功接入到目标接入网设备之后才释放与源接入网设备的连接。该方案可以有效地达到切换过程中中断时间减少的效果。
图4示出了本申请实施例的切换接入网设备的方法400的示意性框图。如图4所示，该方法200包括以下部分或全部内容：
S410，终端设备在保持与源接入网设备的连接的情况下，向目标接入网设备发起随机接入；
S420，在成功接入到所述目标接入网设备后并且在所述源接入网设备的信道质量满足预设条件时，所述终端设备释放与所述源接入网设备的连接。
具体地，终端设备在接收到切换命令之后可以继续保持与源接入网设备的连接，并向目标接入网设备发起随机接入，在终端设备成功接入到目标接入网设备之后，就可以释放与源接入网设备的连接。进一步地，可以在终端设备成功接入到目标接入网设备并且源接入网设备的信道质量满足预设条件时，释放与源接入网设备的连接。例如，可以是源接入网设备的信道质量差到满足预设条件时，终端设备释放与源接入网设备的连接。
在一种可实现的实施例中，终端设备可以监测源接入网设备的信道质量，当终端设备确定源接入网设备的信道质量满足预设条件时，终端设备主动释放与源接入网设备的连接。那么此时源接入网设备可以基于网络实现判断出终端设备已释放与源接入网设备的连接。
在另一种可替代的实施例中，终端设备也可以向网络设备(源接入网设备和/目标接入网设备)发送辅助信息，辅助信息用于指示源接入网设备的信道质量，而网络设备可以在确定源接入网设备的信道质量满足预设条件时，网络设备才向终端设备发送响应信息，从而使得终端设备释放与源接入网设备的连接。
在其他可替代的实施例中，终端设备也可以监测源接入网设备的信道质量，当终端设备确定源接入网设备的信道质量满足预设条件时，终端设备向网络设备发送辅助信息(源接入网设备和/目标接入网设备)，辅助信息用于指示源接入网设备的信道质量满足预设条件，进而网络设备会向终端设备发送该辅助信息的响应信息，终端设备在接收到该响应信息之后，就可以释放与源接入网设备的连接。
需要说明的是，辅助信息指示源接入网设备的信道质量满足预设条件，可以是直接指示，也可以是间接指示。例如，该辅助信息为1比特，“0”表示源接入网设备的信道质量不满足预设条件，而“1”表示源接入网设备的信道质量满足预设条件。再例如，辅助信息可以通过指示源接入网设备的信道质量来间接指示源接入网设备的信道条件满足预设条件。比如，在辅助信息中携带源接入网设备的信道质量，或者比如，信道质量分为5个等级，等级低于3的信道质量表示源接入网设备的信道质量满足预设条件，而等级高于或等于3的信道质量则表示源接入网设备的信道质量不满足预设条件。
由上述各种实施例可知，可以由终端设备确定源接入网设备的信道质量满足预设条件，也可以由网络设备确定源接入网设备的信道质量满足预设条件。具体地，可以由网络设备配置一个门限值，可以存储在网络设备内部，也可以存储在终端设备内部。终端设备可以对源接入网设备的信道质量进行测量，并将测量结果与存储在内部的门限值进行比较，若低于该门限值，则终端设备可以认为源接入网设备的信道质量满足预设条件。或者终端设备也可以将对源接入网设备的信道质量进行测量得到的测量结果发送给网络设备，网络设备将该测量结果与存储在内部的门限值进行比较，若低于该门限，则网络设备可以认为源接入网设备的信道质量满足预设条件。终端设备还可以通过判断其与源接入网设备的链路发生了无线链路失败(Radio Link Failure，RLF)，进而判断出源接入网设备的信道质量满足预设条件。
应理解，对源接入网设备的信道质量进行测量得到的测量结果可以是参考信号接收功率(Reference Signal Received Power，RSRP)、参考信号接收质量(Reference Signal Received Quality，RSRQ)和信号与干扰加噪声比(Signal to Interference plus Noise Ratio，SINR)等中的至少一种，而门限值则可以是RSRP、RSRQ和SINR中至少一种参数所对 应的门限值，其单位可以是dB或者dBm。
还应理解，终端设备与源接入网设备的链路发生RLF可以包括以下情况中的至少一种情况：无线链路控制(Radio Link Control，RLC)自重重传请求(Automatic Repeat-reQuest，ARQ)重传达到最大次数、所述终端设备连续收到多个失步指示和定时器T310/定时器T312超时等。
可选地，若终端设备或网络设备判断出源接入网设备的信道质量高于或等于预配置的门限值时，终端设备可以先不释放与源接入网设备的连接，直到判断出源接入网设备的信道质量低于预配置的门限值，终端设备才释放与源接入网设备的连接。或者在终端设备或网络设备判断出源接入网设备的信道质量高于或等于预配置的门限值时启动一个定时器，在定时器超时的情况下，终端设备才释放与源接入网设备的连接等。
可选地，终端设备在向目标接入网设备发起随机接入之前对源接入网设备进行的测量，与终端设备成功接入到目标接入网设备之后对源接入网设备进行的测量可以是基于上述相同或不同的参数，并且前后两次判断的信道质量的门限值可以是相同的，也可以是不同的，本申请实施例对此不构成限定。
可选地，在本申请实施例中，在终端设备向目标接入网设备发起随机接入之前，终端设备接收源接入网设备发送的切换命令，该切换命令中指示此次切换类型为同时连接切换(simultaneous connectivity HO)，即指示终端设备在保持与源接入网设备的连接的情况下，从源接入网设备切换到目标接入网设备。同时，源接入网设备还可以向终端设备配置源接入网设备信道质量监测的测量事件，例如，可以在切换命令中携带该测量事件，该测量事件可以包括一个或多个目标接入网设备所对应的门限值。应理解，所谓切换类型可以包括上述条件切换、普通切换以及同时连接切换等，例如，该普通切换可以指没有任何增强的切换，例如，该普通切换可以为如图2所示的切换过程；条件切换可以为如图3所示的切换过程；而本申请实施例则主要针对于同时连接切换的场景。另外，该切换类型还可以包括其他类型，例如，还可以包括：无随机接入信道(Random Access Channel-LESS，RACH-LESS)的切换；还可以包括先接后断(make before break，MBB)切换。还可以包括conditional handover时UE执行HO execution(S304)的同时保持源基站连接的切换。
可选地，终端设备发起向切换命令中配置的一个目标接入网设备发起随机接入，同时保持与源接入网设备的连接，可以包括：保留源小区(对应本申请实施例中的源接入网设备)的协议栈，包括保留源小区的用户面无线承载(Data Radio Bearer，DRB)和/或信令无线承载(Signalling Radio Bearer，SRB)；建立目标小区(对应本申请实施例中的目标接入网设备)的协议栈，包括建立目标小区的DRB和/或SRB。
可选地，终端设备成功接入到目标接入网设备，对于非竞争随机接入(contention-free random access，CFRA)，可以是终端设备成功接收RAR或者发送切换完成消息(RRC reconfiguration complete message)；而对于竞争随机接入(contention-based random access，CBRA)，可以是终端设备成功发送切换完成消息(RRC reconfiguration complete message)或者成功接收竞争解决消息(contention resolution)。
下面将结合以下几个具体实施例详细描述本申请技术方案。
可选地，作为第一个实施例，如图5所示，终端设备可以在保持与源接入网设备的连接的同时向目标接入网设备发起随机接入，在终端设备成功接入到目标接入网设备之后，终端设备可以对源接入网设备的信道质量进行测量，例如进行无线链路监测(Radio Link Monitor，RLM)或无线资源管理(Radio Resource Management，RRM)。在信道质量的测量值(例如RSRP)低于预配置的门限值时终端设备可以主动释放与源接入网设备的连接。
对于源接入网设备而言，一种可实现的方式为，源接入网设备可以基于实现判断终 端设备已经释放了与源接入网设备的连接。另一种可实现的方式为，终端设备也可以向目标接入网设备发送分组数据汇聚协议(Packet Data Convergence Protocol，PDCP)状态报告(status report)，以告知目标接入网设备当前下行数据的接收情况，在目标接入网设备接收到PDCP status report之后，也可以通知源接入网设备终端设备已释放了与源接入网设备的连接，进而源接入网设备可以向目标接入网设备发送数据前传信息(data forwarding)，其中，该data forwarding可以包括未收到正确反馈的下行数据包和/或待传输的数据包等。
可选地，作为第二个实施例，如图6所示，终端设备可以在保持与源接入网设备的连接的同时向目标接入网设备发起随机接入，在终端设备成功接入到目标接入网设备之后，终端设备可以对源接入网设备的信道质量进行测量，例如进行RLM或RRM。在信道质量的测量值(例如RSRP)低于预配置的门限值时终端设备可以向源接入网设备发送辅助信息，以指示源接入网设备的信道质量满足预设条件。那么源接入网设备在接收到终端设备发送的辅助信息之后，可以停止向终端设备调度下行数据，还可以向终端设备发送辅助信息的响应信息，或者源接入网设备指示目标接入网设备向终端设备发送辅助信息的响应信息，以使得终端设备释放与源接入网设备的连接。源接入网设备在接收到终端设备发送的辅助信息之后，还可以向目标接入网设备发送data forwarding，其中，该data forwarding可以包括未收到正确反馈的下行数据包和/或待传输的数据包等。终端设备在接收到源接入网设备或目标接入网设备发送的响应信息之后，可以释放与源接入网设备的连接，还可以向目标接入网设备发送PDCP status report。
可选地，作为第三个实施例，如图7所示，终端设备可以在保持与源接入网设备的连接的同时向目标接入网设备发起随机接入，在终端设备成功接入到目标接入网设备之后，终端设备可以对源接入网设备的信道质量进行测量，例如进行RLM或RRM。在信道质量的测量值(例如RSRP)低于预配置的门限值时终端设备可以向目标接入网设备发送辅助信息，并由目标接入网设备向源接入网设备指示停止调度下行数据，目标接入网设备还可以向终端设备发送辅助信息的响应信息，或指示源接入网设备向终端设备发送辅助信息的响应信息，以使得终端设备释放与源接入网设备的连接，目标接入网设备还可以指示源接入网设备向目标接入网设备发送data forwarding，其中，该data forwarding可以包括未收到正确反馈的下行数据包以及待传输的数据包等。终端设备在接收到目标接入网设备或源接入网设备发送的响应信息之后，可以释放与源接入网设备的连接，还可以向目标接入网设备发送PDCP status report。
可选地，作为第四个实施例，终端设备可以在保持与源接入网设备的连接的同时向目标接入网设备发起随机接入，在终端设备成功接入到目标接入网设备之后，终端设备可以对源接入网设备的信道质量进行测量，例如进行RLM或RRM。在信道质量的测量值(例如RSRP)低于预配置的门限值时终端设备可以向目标接入网设备和源接入网设备都发送辅助信息，如果目标接入网设备和源接入网设备中只有一个接收到终端设备发送的辅助信息，则可以参照第二个实施例和第三个实施例执行。而如果目标接入网设备和源接入网设备均接收到终端设备发送的辅助信息，则二者之间可以进行交互，以使得其中之一向终端设备发送辅助信息的响应信息。其余步骤均可参见第二个实施例和第三个实施例。
可选地，本申请实施例中的辅助信息可以承载于无线资源控制(Radio Resource Control，RRC)信令、媒体接入控制(Media Access Control，MAC)控制元素(Control Element，CE)信令或上行控制信息(Uplink Control Information，UCI)中。
可选地，在本申请实施例中，终端设备接收到辅助信息的响应信息并且释放与源接入网设备的连接可以在源接入网设备向目标接入网设备发送data forwarding之后执行。
因此，本申请实施例的切换接入网设备的方法，在成功接入目标接入网设备后基于 源小区的信道质量来释放源接入网设备的连接，使得终端设备和源接入网设备在释放连接的时候保持同步，并且基于辅助信息使得源小区可以提前进行数据前传给目标接入网设备，减小了数据收发的中断时间同时增加了切换的鲁棒性。
图8示出了本申请实施例的切换接入网设备的方法500的示意性框图。如图8所示，该方法500可以包括以下部分或全部内容：
S510，在终端设备保持与源接入网设备的连接且成功接入到目标接入网设备后，网络设备接收辅助信息，所述网络设备为所述源接入网设备或所述目标接入网设备；
S520，所述网络设备发送所述辅助信息的响应信息，所述响应信息用于指示所述终端设备释放与所述源接入网设备的连接。
在S510和S520中，可选地，源接入网设备可以直接接收终端设备发送的辅助信息，并且由源接入网设备发送辅助信息的响应信息，以指示终端设备释放与源接入网设备的连接。可选地，目标接入网设备可以直接接收终端设备发送的辅助信息，并且由目标接入网设备发送辅助信息的响应信息，以指示终端设备释放与源接入网设备的连接。可选地，源接入网设备可以接收终端设备发送的辅助信息，并且由源接入网设备指示目标接入网设备向终端设备发送辅助信息的响应信息，以指示终端设备释放与源接入网设备的连接。可选地，目标接入网设备可以接收终端设备发送的辅助信息，并且由目标接入网设备指示源接入网设备向终端设备发送辅助信息的响应信息，以指示终端设备释放与源接入网设备的连接。
在一种实施例中，所述网络设备接收辅助信息，包括：在所述终端设备确定所述源接入网设备的信道质量满足预设条件的情况下，所述网络设备接收所述辅助信息，所述辅助信息用于指示所述源接入网设备的信道质量满足预设条件。
在另一种实施例中，所述辅助信息用于指示所述源接入网设备的信道质量，所述网络设备可以在确定所述源接入网设备的信道质量满足预设条件的情况下，向所述终端设备发送所述辅助信息的响应信息。
可选地，在本申请实施例中，所述辅助信息用于指示所述源接入网设备的信道质量的测量值低于预配置的门限。
可选地，在本申请实施例中，所述预配置的门限包括以下参数中的至少一种参数对应的门限：参考信号接收功率RSRP、参考信号接收质量RSRQ和信号与干扰加噪声比SINR。
可选地，在本申请实施例中，所述网络设备为所述目标接入网设备，所述辅助信息用于指示所述终端设备与所述源接入网设备的链路发生无线链路失败RLF。
可选地，在本申请实施例中，所述终端设备与所述源接入网设备的链路发生无线链路失败RLF包括以下情况中的至少一种情况：无线链路控制RLC自动重传请求ARQ重传达到最大次数、所述终端设备连续收到多个失步指示和T310/T312超时。
可选地，在本申请实施例中，所述网络设备为所述源接入网设备，所述方法还包括：所述源接入网设备在接收到所述辅助信息的情况下，停止下行数据的调度和/或向所述目标接入网设备发送数据前传信息。
可选地，在本申请实施例中，所述网络设备为所述目标接入网设备，所述方法还包括：所述目标接入网设备在接收到所述辅助信息的情况下，向所述源接入网设备发送指示信息，所述指示信息用于指示所述源接入网设备停止下行数据的调度和/或向所述目标接入网设备发送数据前传信息。
可选地，在本申请实施例中，所述网络设备为所述目标接入网设备，所述方法还包括：在所述终端设备释放与所述源接入网设备的连接的情况下，所述目标接入网设备接收所述终端设备发送的分组数据汇聚协议PDCP状态报告。
可选地，在本申请实施例中，所述网络设备为所述源接入网设备，所述方法还包括： 在所述终端设备向所述目标接入网设备发起随机接入之前，所述源接入网设备向所述终端设备发送切换命令，所述切换命令用于指示所述终端设备在保持与所述源接入网设备的连接的情况下，从所述源接入网设备切换到所述目标接入网设备。
可选地，在本申请实施例中，所述切换命令包括所述源接入网设备的信道质量监测的测量事件。
可选地，在本申请实施例中，所述辅助信息承载于无线资源控制RRC信令、媒体接入控制MAC控制元素CE信令或上行控制信息UCI。
应理解，网络设备侧描述的源接入网设备和目标接入网设备与终端设备之间的交互及相关特性、功能等与终端设备的相关特性、功能相应。并且相关内容在上述方法400中已经作了详尽描述，为了简洁，在此不再赘述。
应理解，在本申请的各种实施例中，上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本申请实施例的实施过程构成任何限定。
上文中详细描述了根据本申请实施例的切换接入网设备的方法，下面将结合图9至图11，描述根据本申请实施例的切换接入网设备的装置，方法实施例所描述的技术特征适用于以下装置实施例。
图9示出了本申请实施例的终端设备600的示意性框图。如图9所示，该终端设备600包括：
收发单元610，用于在保持与源接入网设备的连接的情况下，向目标接入网设备发起随机接入；
处理单元620，用于在成功接入到所述目标接入网设备后并且在所述源接入网设备的信道质量满足预设条件时，释放与所述源接入网设备的连接。
可选地，在本申请实施例中，所述处理单元还用于：在成功接入到所述目标接入网设备后，确定所述源接入网设备的信道质量满足预设条件；所述收发单元还用于：向所述源接入网设备和/或所述目标接入网设备发送辅助信息，所述辅助信息用于指示所述源接入网设备的信道质量满足预设条件；接收所述辅助信息的响应信息，所述响应信息用于指示所述终端设备释放与所述源接入网设备的连接；所述处理单元具体用于：根据所述响应信息，释放与所述源接入网设备的连接。
可选地，在本申请实施例中，所述处理单元具体用于：确定所述接入网设备的信道质量的测量值低于预配置的门限。
可选地，在本申请实施例中，所述预配置的门限包括以下参数中的至少一种参数对应的门限：参考信号接收功率RSRP、参考信号接收质量RSRQ和信号与干扰加噪声比SINR。
可选地，在本申请实施例中，所述处理单元具体用于：确定所述终端设备与所述源接入网设备的链路发生无线链路失败RLF。
可选地，在本申请实施例中，所述终端设备与所述源接入网设备的链路发生RLF包括以下情况中的至少一种情况：无线链路控制RLC自重重传请求ARQ重传达到最大次数、所述终端设备连续收到多个失步指示和定时器T310/定时器T312超时。
可选地，在本申请实施例中，所述收发单元还用于：在所述处理单元释放与所述源接入网设备的连接的情况下，向所述目标接入网设备发送分组数据汇聚协议PDCP状态报告。
可选地，在本申请实施例中，所述收发单元还用于：在向所述目标接入网设备发起随机接入之前，接收切换命令，所述切换命令用于指示所述终端设备在保持与所述源接入网设备的连接的情况下，从所述源接入网设备切换到所述目标接入网设备。
可选地，在本申请实施例中，所述切换命令包括所述源接入网设备的信道质量监测 的测量事件。
可选地，在本申请实施例中，所述辅助信息承载于无线资源控制RRC信令、媒体接入控制MAC控制元素CE信令或上行控制信息UCI。
因此，本申请实施例的终端设备，在成功接入目标接入网设备后基于源小区的信道质量来释放源接入网设备的连接，使得终端设备和源接入网设备在释放连接的时候保持同步，并且基于辅助信息使得源小区可以提前进行数据前传给目标接入网设备，减小了数据收发的中断时间同时增加了切换的鲁棒性。
应理解，根据本申请实施例的终端设备600可对应于本申请方法实施例中的终端设备，并且终端设备600中的各个单元的上述和其它操作和/或功能分别为了实现图4方法中终端设备的相应流程，为了简洁，在此不再赘述。
图10示出了本申请实施例的网络设备700的示意性框图。如图10所示，该网络设备700包括：
收发单元710，用于在终端设备保持与源接入网设备的连接且成功接入到目标接入网设备后，接收辅助信息，所述网络设备为所述源接入网设备或所述目标接入网设备；
所述收发单元710还用于：发送所述辅助信息的响应信息，所述响应信息用于指示所述终端设备释放与所述源接入网设备的连接。
可选地，在本申请实施例中，所述收发单元具体用于：在所述终端设备确定所述源接入网设备的信道质量满足预设条件的情况下，接收所述辅助信息，所述辅助信息用于指示所述源接入网设备的信道质量满足预设条件。
可选地，在本申请实施例中，所述辅助信息用于指示所述源接入网设备的信道质量的测量值低于预配置的门限。
可选地，在本申请实施例中，所述预配置的门限包括以下参数中的至少一种参数对应的门限：参考信号接收功率RSRP、参考信号接收质量RSRQ和信号与干扰加噪声比SINR。
可选地，在本申请实施例中，所述网络设备为所述目标接入网设备，所述辅助信息用于指示所述终端设备与所述源接入网设备的链路发生无线链路失败RLF。
可选地，在本申请实施例中，所述终端设备与所述源接入网设备的链路发生无线链路失败RLF包括以下情况中的至少一种情况：无线链路控制RLC自动重传请求ARQ重传达到最大次数、所述终端设备连续收到多个失步指示和T310/T312超时。
可选地，在本申请实施例中，所述网络设备为所述源接入网设备，所述网络设备还包括：处理单元，用于在所述收发单元接收到所述辅助信息的情况下，停止下行数据的调度，和/或所述收发单元还用于：在所述收发单元接收到所述辅助信息的情况下，向所述目标接入网设备发送数据前传信息。
可选地，在本申请实施例中，所述网络设备为所述目标接入网设备，所述收发单元还用于：在接收到所述辅助信息的情况下，向所述源接入网设备发送指示信息，所述指示信息用于指示所述源接入网设备停止下行数据的调度和/或向所述目标接入网设备发送数据前传信息。
可选地，在本申请实施例中，所述网络设备为所述目标接入网设备，所述收发单元还用于：在所述终端设备释放与所述源接入网设备的连接的情况下，接收所述终端设备发送的分组数据汇聚协议PDCP状态报告。
可选地，在本申请实施例中，所述网络设备为所述源接入网设备，所述收发单元还用于：在所述终端设备向所述目标接入网设备发起随机接入之前，向所述终端设备发送切换命令，所述切换命令用于指示所述终端设备在保持与所述源接入网设备的连接的情况下，从所述源接入网设备切换到所述目标接入网设备。
可选地，在本申请实施例中，所述切换命令包括所述源接入网设备的信道质量监测 的测量事件。
可选地，在本申请实施例中，所述辅助信息承载于无线资源控制RRC信令、媒体接入控制MAC控制元素CE信令或上行控制信息UCI。
应理解，根据本申请实施例的网络设备700可对应于本申请方法实施例中的源接入网设备或目标接入网设备，并且网络设备700中的各个单元的上述和其它操作和/或功能分别为了实现图8方法中网络设备的相应流程，为了简洁，在此不再赘述。
图11是本申请实施例提供的一种通信设备800示意性结构图。图11所示的通信设备800包括处理器810，处理器810可以从存储器中调用并运行计算机程序，以实现本申请实施例中的方法。
可选地，如图11所示，通信设备800还可以包括存储器820。其中，处理器810可以从存储器820中调用并运行计算机程序，以实现本申请实施例中的方法。
其中，存储器820可以是独立于处理器810的一个单独的器件，也可以集成在处理器810中。
可选地，如图11所示，通信设备800还可以包括收发器830，处理器810可以控制该收发器830与其他设备进行通信，具体地，可以向其他设备发送信息或数据，或接收其他设备发送的信息或数据。
其中，收发器830可以包括发射机和接收机。收发器830还可以进一步包括天线，天线的数量可以为一个或多个。
可选地，该通信设备800具体可为本申请实施例的网络设备(源接入网设备或目标接入网设备)，并且该通信设备800可以实现本申请实施例的各个方法中由网络设备实现的相应流程，为了简洁，在此不再赘述。
可选地，该通信设备800具体可为本申请实施例的移动终端/终端设备，并且该通信设备800可以实现本申请实施例的各个方法中由移动终端/终端设备实现的相应流程，为了简洁，在此不再赘述。
图12是本申请实施例的芯片的示意性结构图。图12所示的芯片900包括处理器910，处理器910可以从存储器中调用并运行计算机程序，以实现本申请实施例中的方法。
可选地，如图12所示，芯片900还可以包括存储器920。其中，处理器910可以从存储器920中调用并运行计算机程序，以实现本申请实施例中的方法。
其中，存储器920可以是独立于处理器910的一个单独的器件，也可以集成在处理器910中。
可选地，该芯片900还可以包括输入接口930。其中，处理器910可以控制该输入接口930与其他设备或芯片进行通信，具体地，可以获取其他设备或芯片发送的信息或数据。
可选地，该芯片900还可以包括输出接口940。其中，处理器910可以控制该输出接口940与其他设备或芯片进行通信，具体地，可以向其他设备或芯片输出信息或数据。
可选地，该芯片可应用于本申请实施例中的网络设备，并且该芯片可以实现本申请实施例的各个方法中由网络设备实现的相应流程，为了简洁，在此不再赘述。
可选地，该芯片可应用于本申请实施例中的移动终端/终端设备，并且该芯片可以实现本申请实施例的各个方法中由移动终端/终端设备实现的相应流程，为了简洁，在此不再赘述。
应理解，本申请实施例提到的芯片还可以称为系统级芯片，系统芯片，芯片系统或片上系统芯片等。
图13是本申请实施例提供的一种通信系统1000的示意性框图。如图13所示，该通信系统1000包括终端设备1010和网络设备1020。
其中，该终端设备1010可以用于实现上述方法中由终端设备实现的相应的功能，以 及该网络设备1020可以用于实现上述方法中由网络设备实现的相应的功能，为了简洁，在此不再赘述。
应理解，本申请实施例的处理器可能是一种集成电路芯片，具有信号的处理能力。在实现过程中，上述方法实施例的各步骤可以通过处理器中的硬件的集成逻辑电路或者软件形式的指令完成。上述的处理器可以是通用处理器、数字信号处理器(Digital Signal Processor，DSP)、专用集成电路(Application Specific Integrated Circuit，ASIC)、现成可编程门阵列(Field Programmable Gate Array，FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件。可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体现为硬件译码处理器执行完成，或者用译码处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器，处理器读取存储器中的信息，结合其硬件完成上述方法的步骤。
可以理解，本申请实施例中的存储器可以是易失性存储器或非易失性存储器，或可包括易失性和非易失性存储器两者。其中，非易失性存储器可以是只读存储器(Read-Only Memory，ROM)、可编程只读存储器(Programmable ROM，PROM)、可擦除可编程只读存储器(Erasable PROM，EPROM)、电可擦除可编程只读存储器(Electrically EPROM，EEPROM)或闪存。易失性存储器可以是随机存取存储器(Random Access Memory，RAM)，其用作外部高速缓存。通过示例性但不是限制性说明，许多形式的RAM可用，例如静态随机存取存储器(Static RAM，SRAM)、动态随机存取存储器(Dynamic RAM，DRAM)、同步动态随机存取存储器(Synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(Double Data Rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(Enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(Synchlink DRAM，SLDRAM)和直接内存总线随机存取存储器(Direct Rambus RAM，DR RAM)。应注意，本文描述的系统和方法的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
应理解，上述存储器为示例性但不是限制性说明，例如，本申请实施例中的存储器还可以是静态随机存取存储器(static RAM，SRAM)、动态随机存取存储器(dynamic RAM，DRAM)、同步动态随机存取存储器(synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(double data rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(synch link DRAM，SLDRAM)以及直接内存总线随机存取存储器(Direct Rambus RAM，DR RAM)等等。也就是说，本申请实施例中的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
本申请实施例还提供了一种计算机可读存储介质，用于存储计算机程序。
可选的，该计算机可读存储介质可应用于本申请实施例中的网络设备，并且该计算机程序使得计算机执行本申请实施例的各个方法中由网络设备实现的相应流程，为了简洁，在此不再赘述。
可选地，该计算机可读存储介质可应用于本申请实施例中的终端设备，并且该计算机程序使得计算机执行本申请实施例的各个方法中由移动终端/终端设备实现的相应流程，为了简洁，在此不再赘述。
本申请实施例还提供了一种计算机程序产品，包括计算机程序指令。
可选的，该计算机程序产品可应用于本申请实施例中的网络设备，并且该计算机程序指令使得计算机执行本申请实施例的各个方法中由网络设备实现的相应流程，为了简 洁，在此不再赘述。
可选地，该计算机程序产品可应用于本申请实施例中的终端设备，并且该计算机程序指令使得计算机执行本申请实施例的各个方法中由移动终端/终端设备实现的相应流程，为了简洁，在此不再赘述。
本申请实施例还提供了一种计算机程序。
可选的，该计算机程序可应用于本申请实施例中的网络设备，当该计算机程序在计算机上运行时，使得计算机执行本申请实施例的各个方法中由网络设备实现的相应流程，为了简洁，在此不再赘述。
可选地，该计算机程序可应用于本申请实施例中的终端设备，当该计算机程序在计算机上运行时，使得计算机执行本申请实施例的各个方法中由终端设备实现的相应流程，为了简洁，在此不再赘述。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干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方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(Read-Only Memory，)ROM、随机存取存储器(Random Access Memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应所述以权利要求的保护范围为准。

Claims (54)

  1. 一种切换接入网设备的方法，其特征在于，包括：
    终端设备在保持与源接入网设备的连接的情况下，向目标接入网设备发起随机接入；
    在成功接入到所述目标接入网设备后并且在所述源接入网设备的信道质量满足预设条件时，所述终端设备释放与所述源接入网设备的连接。
  2. 根据权利要求1所述的方法，其特征在于，所述在成功接入到所述目标接入网设备后并且在所述源接入网设备的信道质量满足预设条件时，所述终端设备释放与所述源接入网设备的连接，包括：
    在成功接入到所述目标接入网设备后，所述终端设备确定所述源接入网设备的信道质量满足预设条件；
    所述终端设备向所述源接入网设备和/或所述目标接入网设备发送辅助信息，所述辅助信息用于指示所述源接入网设备的信道质量满足所述预设条件；
    所述终端设备接收所述辅助信息的响应信息，所述响应信息用于指示所述终端设备释放与所述源接入网设备的连接；
    所述终端设备根据所述响应信息，释放与所述源接入网设备的连接。
  3. 根据权利要求2所述的方法，其特征在于，所述终端设备确定所述源接入网设备的信道质量满足预设条件，包括：
    所述终端设备确定所述接入网设备的信道质量的测量值低于预配置的门限。
  4. 根据权利要求3所述的方法，其特征在于，所述预配置的门限包括以下参数中的至少一种参数对应的门限：参考信号接收功率RSRP、参考信号接收质量RSRQ和信号与干扰加噪声比SINR。
  5. 根据权利要求2所述的方法，其特征在于，所述终端设备确定所述源接入网设备的信道质量满足预设条件，包括：
    所述终端设备确定所述终端设备与所述源接入网设备的链路发生无线链路失败RLF。
  6. 根据权利要求5所述的方法，其特征在于，所述终端设备与所述源接入网设备的链路发生RLF包括以下情况中的至少一种情况：无线链路控制RLC自重重传请求ARQ重传达到最大次数、所述终端设备连续收到多个失步指示和定时器T310/定时器T312超时。
  7. 根据权利要求1至6中任一项所述的方法，其特征在于，所述方法还包括：
    所述终端设备在释放与所述源接入网设备的连接的情况下，向所述目标接入网设备发送分组数据汇聚协议PDCP状态报告。
  8. 根据权利要求1至7中任一项所述的方法，其特征在于，所述方法还包括：
    所述终端设备在向所述目标接入网设备发起随机接入之前，接收切换命令，所述切换命令用于指示所述终端设备在保持与所述源接入网设备的连接的情况下，从所述源接入网设备切换到所述目标接入网设备。
  9. 根据权利要求8所述的方法，其特征在于，所述切换命令包括所述源接入网设备的信道质量监测的测量事件。
  10. 根据权利要求2至6中任一项所述的方法，其特征在于，所述辅助信息承载于无线资源控制RRC信令、媒体接入控制MAC控制元素CE信令或上行控制信息UCI。
  11. 一种切换接入网设备的方法，其特征在于，包括：
    在终端设备保持与源接入网设备的连接且成功接入到目标接入网设备后，网络设备接收辅助信息，所述网络设备为所述源接入网设备或所述目标接入网设备；
    所述网络设备发送所述辅助信息的响应信息，所述响应信息用于指示所述终端设备释 放与所述源接入网设备的连接。
  12. 根据权利要求11所述的方法，其特征在于，所述网络设备接收辅助信息，包括：
    所述网络设备接收所述辅助信息，所述辅助信息用于指示所述源接入网设备的信道质量满足预设条件。
  13. 根据权利要求12所述的方法，其特征在于，所述辅助信息用于指示所述源接入网设备的信道质量的测量值低于预配置的门限。
  14. 根据权利要求13所述的方法，其特征在于，所述预配置的门限包括以下参数中的至少一种参数对应的门限：参考信号接收功率RSRP、参考信号接收质量RSRQ和信号与干扰加噪声比SINR。
  15. 根据权利要求12所述的方法，其特征在于，所述网络设备为所述目标接入网设备，所述辅助信息用于指示所述终端设备与所述源接入网设备的链路发生无线链路失败RLF。
  16. 根据权利要求15所述的方法，其特征在于，所述终端设备与所述源接入网设备的链路发生无线链路失败RLF包括以下情况中的至少一种情况：无线链路控制RLC自动重传请求ARQ重传达到最大次数、所述终端设备连续收到多个失步指示和T310/T312超时。
  17. 根据权利要求11至16中任一项所述的方法，其特征在于，所述网络设备为所述源接入网设备，所述方法还包括：
    所述源接入网设备在接收到所述辅助信息的情况下，停止下行数据的调度和/或向所述目标接入网设备发送数据前传信息。
  18. 根据权利要求11至16中任一项所述的方法，其特征在于，所述网络设备为所述目标接入网设备，所述方法还包括：
    所述目标接入网设备在接收到所述辅助信息的情况下，向所述源接入网设备发送指示信息，所述指示信息用于指示所述源接入网设备停止下行数据的调度和/或向所述目标接入网设备发送数据前传信息。
  19. 根据权利要求11至16以及18中任一项所述的方法，其特征在于，所述网络设备为所述目标接入网设备，所述方法还包括：
    在所述终端设备释放与所述源接入网设备的连接的情况下，所述目标接入网设备接收所述终端设备发送的分组数据汇聚协议PDCP状态报告。
  20. 根据权利要求11至17中任一项所述的方法，其特征在于，所述网络设备为所述源接入网设备，所述方法还包括：
    在所述终端设备向所述目标接入网设备发起随机接入之前，所述源接入网设备向所述终端设备发送切换命令，所述切换命令用于指示所述终端设备在保持与所述源接入网设备的连接的情况下，从所述源接入网设备切换到所述目标接入网设备。
  21. 根据权利要求20所述的方法，其特征在于，所述切换命令包括所述源接入网设备的信道质量监测的测量事件。
  22. 根据权利要求11至21中任一项所述的方法，其特征在于，所述辅助信息承载于无线资源控制RRC信令、媒体接入控制MAC控制元素CE信令或上行控制信息UCI。
  23. 一种终端设备，其特征在于，所述终端设备包括：
    收发单元，用于在保持与源接入网设备的连接的情况下，向目标接入网设备发起随机接入；
    处理单元，用于在成功接入到所述目标接入网设备后并且在所述源接入网设备的信道质量满足预设条件时，释放与所述源接入网设备的连接。
  24. 根据权利要求23所述的终端设备，其特征在于，所述处理单元还用于：
    在成功接入到所述目标接入网设备后，确定所述源接入网设备的信道质量满足预设 条件；
    所述收发单元还用于：
    向所述源接入网设备和/或所述目标接入网设备发送辅助信息，所述辅助信息用于指示所述源接入网设备的信道质量满足所述预设条件；
    接收所述辅助信息的响应信息，所述响应信息用于指示所述终端设备释放与所述源接入网设备的连接；
    所述处理单元具体用于：
    根据所述响应信息，释放与所述源接入网设备的连接。
  25. 根据权利要求24所述的终端设备，其特征在于，所述处理单元具体用于：
    确定所述接入网设备的信道质量的测量值低于预配置的门限。
  26. 根据权利要求25所述的终端设备，其特征在于，所述预配置的门限包括以下参数中的至少一种参数对应的门限：参考信号接收功率RSRP、参考信号接收质量RSRQ和信号与干扰加噪声比SINR。
  27. 根据权利要求24所述的终端设备，其特征在于，所述处理单元具体用于：
    确定所述终端设备与所述源接入网设备的链路发生无线链路失败RLF。
  28. 根据权利要求27所述的终端设备，其特征在于，所述终端设备与所述源接入网设备的链路发生RLF包括以下情况中的至少一种情况：无线链路控制RLC自重重传请求ARQ重传达到最大次数、所述终端设备连续收到多个失步指示和定时器T310/定时器T312超时。
  29. 根据权利要求23至28中任一项所述的终端设备，其特征在于，所述收发单元还用于：
    在所述处理单元释放与所述源接入网设备的连接的情况下，向所述目标接入网设备发送分组数据汇聚协议PDCP状态报告。
  30. 根据权利要求23至29中任一项所述的终端设备，其特征在于，所述收发单元还用于：
    在向所述目标接入网设备发起随机接入之前，接收切换命令，所述切换命令用于指示所述终端设备在保持与所述源接入网设备的连接的情况下，从所述源接入网设备切换到所述目标接入网设备。
  31. 根据权利要求30所述的终端设备，其特征在于，所述切换命令包括所述源接入网设备的信道质量监测的测量事件。
  32. 根据权利要求24至28中任一项所述的终端设备，其特征在于，所述辅助信息承载于无线资源控制RRC信令、媒体接入控制MAC控制元素CE信令或上行控制信息UCI。
  33. 一种网络设备，其特征在于，所述网络设备包括：
    收发单元，用于在终端设备保持与源接入网设备的连接且成功接入到目标接入网设备后，接收辅助信息，所述网络设备为所述源接入网设备或所述目标接入网设备；
    所述收发单元还用于：
    发送所述辅助信息的响应信息，所述响应信息用于指示所述终端设备释放与所述源接入网设备的连接。
  34. 根据权利要求33所述的网络设备，其特征在于，所述收发单元具体用于：
    接收所述辅助信息，所述辅助信息用于指示所述源接入网设备的信道质量满足预设条件。
  35. 根据权利要求34所述的网络设备，其特征在于，所述辅助信息用于指示所述源接入网设备的信道质量的测量值低于预配置的门限。
  36. 根据权利要求35所述的网络设备，其特征在于，所述预配置的门限包括以下参 数中的至少一种参数对应的门限：参考信号接收功率RSRP、参考信号接收质量RSRQ和信号与干扰加噪声比SINR。
  37. 根据权利要求34所述的网络设备，其特征在于，所述网络设备为所述目标接入网设备，所述辅助信息用于指示所述终端设备与所述源接入网设备的链路发生无线链路失败RLF。
  38. 根据权利要求37所述的网络设备，其特征在于，所述终端设备与所述源接入网设备的链路发生无线链路失败RLF包括以下情况中的至少一种情况：无线链路控制RLC自动重传请求ARQ重传达到最大次数、所述终端设备连续收到多个失步指示和T310/T312超时。
  39. 根据权利要求33至38中任一项所述的网络设备，其特征在于，所述网络设备为所述源接入网设备，所述网络设备还包括：
    处理单元，用于在所述收发单元接收到所述辅助信息的情况下，停止下行数据的调度，和/或
    所述收发单元还用于：
    在所述收发单元接收到所述辅助信息的情况下，向所述目标接入网设备发送数据前传信息。
  40. 根据权利要求33至38中任一项所述的网络设备，其特征在于，所述网络设备为所述目标接入网设备，所述收发单元还用于：
    在接收到所述辅助信息的情况下，向所述源接入网设备发送指示信息，所述指示信息用于指示所述源接入网设备停止下行数据的调度和/或向所述目标接入网设备发送数据前传信息。
  41. 根据权利要求33至38以及40中任一项所述的网络设备，其特征在于，所述网络设备为所述目标接入网设备，所述收发单元还用于：
    在所述终端设备释放与所述源接入网设备的连接的情况下，接收所述终端设备发送的分组数据汇聚协议PDCP状态报告。
  42. 根据权利要求33至39中任一项所述的网络设备，其特征在于，所述网络设备为所述源接入网设备，所述收发单元还用于：
    在所述终端设备向所述目标接入网设备发起随机接入之前，向所述终端设备发送切换命令，所述切换命令用于指示所述终端设备在保持与所述源接入网设备的连接的情况下，从所述源接入网设备切换到所述目标接入网设备。
  43. 根据权利要求42所述的网络设备，其特征在于，所述切换命令包括所述源接入网设备的信道质量监测的测量事件。
  44. 根据权利要求33至43中任一项所述的网络设备，其特征在于，所述辅助信息承载于无线资源控制RRC信令、媒体接入控制MAC控制元素CE信令或上行控制信息UCI。
  45. 一种终端设备，其特征在于，包括：处理器和存储器，该存储器用于存储计算机程序，所述处理器用于调用并运行所述存储器中存储的计算机程序，执行如权利要求1至10中任一项所述的方法。
  46. 一种网络设备，其特征在于，包括：处理器和存储器，该存储器用于存储计算机程序，所述处理器用于调用并运行所述存储器中存储的计算机程序，执行如权利要求11至22中任一项所述的方法。
  47. 一种芯片，其特征在于，包括：处理器，用于从存储器中调用并运行计算机程序，使得安装有所述芯片的设备执行如权利要求1至10中任一项所述的方法。
  48. 一种芯片，其特征在于，包括：处理器，用于从存储器中调用并运行计算机程序，使得安装有所述芯片的设备执行如权利要求11至22中任一项所述的方法。
  49. 一种计算机可读存储介质，其特征在于，用于存储计算机程序，所述计算机程序使得计算机执行如权利要求1至10中任一项所述的方法。
  50. 一种计算机可读存储介质，其特征在于，用于存储计算机程序，所述计算机程序使得计算机执行如权利要求11至22中任一项所述的方法。
  51. 一种计算机程序产品，其特征在于，包括计算机程序指令，该计算机程序指令使得计算机执行如权利要求1至10中任一项所述的方法。
  52. 一种计算机程序产品，其特征在于，包括计算机程序指令，该计算机程序指令使得计算机执行如权利要求11至22中任一项所述的方法。
  53. 一种计算机程序，其特征在于，所述计算机程序使得计算机执行如权利要求1至10中任一项所述的方法。
  54. 一种计算机程序，其特征在于，所述计算机程序使得计算机执行如权利要求11至22中任一项所述的方法。
PCT/CN2019/086915 2019-05-14 2019-05-14 切换接入网设备的方法、终端设备和网络设备 WO2020227946A1 (zh)

Priority Applications (6)

Application Number Priority Date Filing Date Title
CN201980090005.9A CN113348700A (zh) 2019-05-14 2019-05-14 切换接入网设备的方法、终端设备和网络设备
PCT/CN2019/086915 WO2020227946A1 (zh) 2019-05-14 2019-05-14 切换接入网设备的方法、终端设备和网络设备
EP19928446.4A EP3958617A4 (en) 2019-05-14 2019-05-14 METHOD OF SWITCHING BETWEEN ACCESS NETWORK DEVICES, TERMINAL DEVICE AND NETWORK DEVICE
CN202111478727.7A CN114125975B (zh) 2019-05-14 2019-05-14 切换接入网设备的方法、终端设备和网络设备
KR1020217040866A KR20220006643A (ko) 2019-05-14 2019-05-14 액세스 네트워크 디바이스의 핸드오버 방법, 단말 디바이스 및 네트워크 디바이스
US17/525,508 US20220070747A1 (en) 2019-05-14 2021-11-12 Method for switching between access network devices, terminal device, and network device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2019/086915 WO2020227946A1 (zh) 2019-05-14 2019-05-14 切换接入网设备的方法、终端设备和网络设备

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US17/525,508 Continuation US20220070747A1 (en) 2019-05-14 2021-11-12 Method for switching between access network devices, terminal device, and network device

Publications (1)

Publication Number Publication Date
WO2020227946A1 true WO2020227946A1 (zh) 2020-11-19

Family

ID=73289983

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2019/086915 WO2020227946A1 (zh) 2019-05-14 2019-05-14 切换接入网设备的方法、终端设备和网络设备

Country Status (5)

Country Link
US (1) US20220070747A1 (zh)
EP (1) EP3958617A4 (zh)
KR (1) KR20220006643A (zh)
CN (2) CN114125975B (zh)
WO (1) WO2020227946A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113472611A (zh) * 2021-07-26 2021-10-01 东莞市金锐显数码科技有限公司 获取WiFi信号强度的方法、装置及可读存储介质

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11653281B2 (en) * 2021-02-18 2023-05-16 Verizon Patent And Licensing Inc. Differentiated mobility schemes and neighbor lists

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101227677A (zh) * 2008-02-05 2008-07-23 中兴通讯股份有限公司 一种单无线信道语音业务连续性的域切换方法
CN101426252A (zh) * 2007-11-02 2009-05-06 华为技术有限公司 一种路径切换的处理方法、系统和装置
CN101577950A (zh) * 2009-06-05 2009-11-11 西安电子科技大学 基于小区预估的越区切换增强方法
CN105659662A (zh) * 2014-09-29 2016-06-08 华为技术有限公司 一种分流的方法及装置

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101222419B (zh) * 2007-01-10 2011-07-20 华为技术有限公司 数据通信方法及系统、数据发送/接收装置
CN104902569B (zh) * 2009-03-12 2018-08-17 交互数字专利控股公司 由wtru实现的用于执行无线电链路监控的方法及wtru
CN106993313A (zh) * 2016-01-21 2017-07-28 中兴通讯股份有限公司 一种实现承载切换的方法及终端和基站
KR20170114258A (ko) * 2016-04-01 2017-10-13 주식회사 케이티 핸드오버 수행 방법 및 그 장치
CN107371208B (zh) * 2016-05-13 2022-04-29 中兴通讯股份有限公司 切换方法及装置
CN107690162B (zh) * 2016-08-03 2021-05-11 中兴通讯股份有限公司 小区连接失败的处理方法及装置
CN112738858B (zh) * 2017-03-24 2022-05-31 华为技术有限公司 切换的方法和设备
US10687263B2 (en) * 2018-02-15 2020-06-16 Qualcomm Incorporated Enhanced make-before-break handover
US11246069B2 (en) * 2018-11-01 2022-02-08 Qualcomm Incorporated Single transmit sharing during handover and dual connectivity operations
WO2020220315A1 (en) * 2019-04-30 2020-11-05 Zte Corporation Method, apparatus and system for mobility control

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101426252A (zh) * 2007-11-02 2009-05-06 华为技术有限公司 一种路径切换的处理方法、系统和装置
CN101227677A (zh) * 2008-02-05 2008-07-23 中兴通讯股份有限公司 一种单无线信道语音业务连续性的域切换方法
CN101577950A (zh) * 2009-06-05 2009-11-11 西安电子科技大学 基于小区预估的越区切换增强方法
CN105659662A (zh) * 2014-09-29 2016-06-08 华为技术有限公司 一种分流的方法及装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP3958617A4 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113472611A (zh) * 2021-07-26 2021-10-01 东莞市金锐显数码科技有限公司 获取WiFi信号强度的方法、装置及可读存储介质

Also Published As

Publication number Publication date
CN113348700A (zh) 2021-09-03
EP3958617A4 (en) 2022-07-20
US20220070747A1 (en) 2022-03-03
CN114125975B (zh) 2023-06-09
KR20220006643A (ko) 2022-01-17
CN114125975A (zh) 2022-03-01
EP3958617A1 (en) 2022-02-23

Similar Documents

Publication Publication Date Title
US11751112B2 (en) Handover method and device
CN110999390B (zh) 在无线通信系统中执行切换过程的方法及其装置
US20220394577A1 (en) Handover method and communication apparatus
US11109291B2 (en) Method for performing handover in wireless communication system and device for same
WO2021003616A1 (zh) 用于切换网络设备的方法和终端设备
US9554309B2 (en) Method and apparatus for transmitting indicator in wireless communication system
US11265791B2 (en) Reducing a data transmission delay of a terminal device in a handover process
WO2016049431A1 (en) Service-specific air-interface selection
US20180368194A1 (en) Terminal device, network device, and data transmission method
US20220303840A1 (en) Cell handover method and user equipment
CN108990101B (zh) 处理双连接中次要节点改变的装置及方法
WO2021051286A1 (zh) 用于切换网络设备的方法、终端设备和网络设备
WO2020155070A1 (zh) 用于切换网络设备的方法和终端设备
US20220070747A1 (en) Method for switching between access network devices, terminal device, and network device
CN114080833A (zh) 无线通信网络中的用户设备、目标接入节点和方法
WO2020164026A1 (zh) 随机接入的方法、终端设备和网络设备
EP3876582B1 (en) Retransmission in advance of to-be-transmitted data packets in a dual connectivity scenario, upon failure of the secondary link
KR102477387B1 (ko) 셀 핸드오버 방법, 네트워크 노드 및 단말 기기
CN116114311A (zh) 用于处理主小区组mcg故障和无线电链路故障rlf汇报的方法、产品和设备
CN113014370B (zh) 信令发送方法及装置、存储介质、基站设备、用户设备
WO2020252709A1 (zh) 无线通信的方法、网络设备和终端设备
CA3235117A1 (en) Data transmission method and communication apparatus

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 19928446

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

ENP Entry into the national phase

Ref document number: 2019928446

Country of ref document: EP

Effective date: 20211117

ENP Entry into the national phase

Ref document number: 20217040866

Country of ref document: KR

Kind code of ref document: A