WO2021003616A1 - Procédé de commutation de dispositifs de réseau et dispositif terminal - Google Patents

Procédé de commutation de dispositifs de réseau et dispositif terminal Download PDF

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Publication number
WO2021003616A1
WO2021003616A1 PCT/CN2019/094932 CN2019094932W WO2021003616A1 WO 2021003616 A1 WO2021003616 A1 WO 2021003616A1 CN 2019094932 W CN2019094932 W CN 2019094932W WO 2021003616 A1 WO2021003616 A1 WO 2021003616A1
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WIPO (PCT)
Prior art keywords
network device
terminal device
condition
trigger time
handover
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PCT/CN2019/094932
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English (en)
Chinese (zh)
Inventor
尤心
卢前溪
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.)
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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 CN201980082148.5A priority Critical patent/CN113170367B/zh
Priority to PCT/CN2019/094932 priority patent/WO2021003616A1/fr
Publication of WO2021003616A1 publication Critical patent/WO2021003616A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/34—Reselection control
    • H04W36/36—Reselection control by user or terminal equipment
    • H04W36/362—Conditional handover

Definitions

  • the embodiments of the present application relate to the field of communications, and in particular to a method and terminal device for switching network devices.
  • the terminal device if conditional handover is configured on the network side, the terminal device usually responds to the corresponding network side after receiving the radio resource control (Radio Resource Control, RRC) connection reconfiguration message sent by the source network device.
  • RRC Radio Resource Control
  • the RRC connection reconfiguration complete message and then based on the channel quality measurement, determines whether to initiate a handover.
  • the embodiments of the present application provide a method and terminal device for switching network devices, which are beneficial to reducing signaling overhead.
  • a terminal device which is used to execute 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 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 chip is provided, which is used to implement the method in the first aspect or its implementation manners.
  • 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 the method in the first aspect or its implementation manners.
  • a computer-readable storage medium for storing a computer program that enables a computer to execute the method in the first aspect or its implementation manners.
  • a computer program product including computer program instructions that cause a computer to execute the method in the first aspect or its implementation manners.
  • Fig. 1 is a schematic diagram of a communication system architecture 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 network devices according to an embodiment of the present application.
  • FIG. 6 is a schematic diagram of a method for switching network equipment provided by an embodiment of the present application.
  • FIG. 7 is a schematic diagram of a method for switching network equipment provided by an embodiment of the present application.
  • FIG. 10 is a schematic block diagram of a terminal device according to an embodiment of the present application.
  • FIG. 12 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 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 a 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.
  • 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 UE After the UE successfully accesses the target cell, the UE sends an RRC connection 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 connection reconfiguration complete message. At this point, the target eNB can start sending data to the UE.
  • 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 alternately arrive 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 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.
  • 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.
  • the network side Before handover, the network side usually configures measurement conditions or handover conditions for the terminal device to determine whether to switch.
  • the so-called measurement refers to the mobility measurement in the connected state.
  • the measurement object is the basic unit of frequency point. Each configured measurement object is a separate frequency point and has a separate measurement object identifier. For Evolved Universal Terrestrial Radio Access (E-UTRA), the same frequency As with inter-frequency measurement, the measurement object is a single E-UTRA carrier frequency. For cells related to the carrier frequency, E-UTRA may configure a cell offset list and a blacklist cell list. No operation is performed on the blacklisted cells in the measurement evaluation and measurement report.
  • E-UTRA Evolved Universal Terrestrial Radio Access
  • the same frequency/different frequency measurement events in the LTE system include the following:
  • Event A1 the serving cell is higher than an absolute threshold (serving>threshold);
  • Event A2 The serving cell is below a decision threshold (serving ⁇ threshold);
  • Event A3 The neighboring cell is higher than the primary cell/primary and secondary cell by an offset
  • Event A5 the primary cell/primary and secondary cell is below absolute threshold 1 and the neighboring cell/secondary cell is above another absolute threshold 2;
  • Event A6 The adjacent cell is higher than the secondary cell by an offset
  • Event B1 The neighboring cell is higher than an absolute threshold
  • Event B2 The primary cell is higher than an absolute threshold 1 and the neighboring cell is higher than another absolute threshold 2.
  • a separate measurement identifier associates the measurement object with a specific reporting configuration. If the terminal device reaches the measurement start threshold, the terminal device will determine whether to perform this type of measurement based on the presence of the measurement identifier.
  • the measurement report is evaluated when a certain trigger condition is met. If the report condition is met, the terminal device will fill in the measurement report and send it to the network device.
  • the terminal device triggers the sending of the measurement report only when the measurement event entry threshold configured by the network is met and continues for a period of time, and the process ends after the measurement report is sent once.
  • the reporting configuration corresponding to this criterion is:
  • the trigger type is "event", including A1-A6, B1-B2, one of the measurement events and their threshold parameters;
  • the number of reports is 1;
  • the terminal equipment After the network configuration measurement, the terminal equipment measures the corresponding frequency points according to the configuration content, and sends the measurement report according to the specified reporting period and interval:
  • the trigger period is "period", including "reportCGI” and “reportStrongestCell”
  • reportCGI ReportCGI
  • reportStrongestCell the number of reports can be greater than 1;
  • the T321 timer will be started.
  • the terminal device can stop T321 and initiate reporting in advance.
  • the event triggers periodic reporting
  • the terminal device will trigger the sending of the measurement report only when the measurement event entry threshold of the network configuration is met and lasts for a period of time. After the report is triggered, the timer between multiple measurements and the counter of the number of measurements will be started until the report The process ends when the number of times reaches the requirement.
  • the reporting configuration corresponding to this criterion is:
  • the trigger type is "event", including a measurement event from A1 to A5 and its threshold parameters;
  • the number of reports is greater than 1;
  • the reporting interval is valid, and the network sets the reporting cycle timer according to the configured interval parameter.
  • the source network device sends the conditional switching command configured by the target network device to the terminal device in advance through an RRC connection reconfiguration message, and the terminal device needs to reply to the source network device with an RRC connection reconfiguration complete message.
  • the terminal device will continue to monitor the channel quality of the target network device configured in the condition switching command. If the switching condition is met, the terminal device can immediately initiate the switching. However, when the terminal device receives the RRC connection reconfiguration message sent by the source network device, the handover condition has been met. If the terminal device continues to reply the RRC connection reconfiguration complete message to the source network device and then performs the handover, it may cause Waste of signaling overhead.
  • FIG. 4 shows a schematic block diagram of a method 400 for switching network devices according to an embodiment of the present application. As shown in FIG. 4, the method 400 includes some or all of the following contents:
  • the terminal device receives a radio resource control RRC connection reconfiguration message sent by the source network device.
  • the terminal device In the case that the channel quality of the target network device and/or the source network device meets the switching condition, the terminal device initiates a switch to the target network device based on the conditional switching command and does not send to the source network device An RRC connection reconfiguration complete message for the RRC connection reconfiguration message.
  • the RRC connection reconfiguration message may carry a conditional switching command configured by the target network device. It should be noted that the RRC connection reconfiguration message here may not carry the conditional switching command, that is, it is decoupled from the conditional switching command.
  • the RRC connection reconfiguration message can carry any information, as long as the terminal device is required to reply a corresponding RRC connection reconfiguration complete message.
  • the terminal device receives the conditional switching command and the switching condition before receiving the RRC connection reconfiguration message carrying other information, and the channel quality of the target network device and/or the source network device is after receiving the RRC connection reconfiguration If the handover condition is met after the message, the terminal device may initiate a handover to the target network device and not send the RRC connection reconfiguration complete message for the RRC connection reconfiguration message to the source network device.
  • the switching condition in the embodiment of the present application may be configured by the source network device or configured by the target network device. It may be carried in the conditional switching command in the RRC connection reconfiguration message and sent to the terminal device, or carried in the RRC connection reconfiguration message in addition to the conditional switching command and sent to the terminal device.
  • the terminal device obtains the switching condition and the conditional switching command, and measures the channel quality of the target network device and/or the source network device in real time according to the requirements of the switching condition.
  • the handover condition requires that the measured value of the source network device's channel quality is less than an absolute threshold. If it is met, the terminal device can initiate a handover to the target network device.
  • the handover condition requires that the measured value of the channel quality of the source network device is less than an absolute threshold and the measured value of the channel quality of the target network device is good to be greater than an absolute threshold. If it is met, the terminal device can initiate a request to the target network device Switch.
  • the handover condition may require that the measured value of the channel quality of the target network device is better than the measured value of the channel quality of the source network device by a threshold. If it is met, the terminal device can initiate a handover to the network device.
  • the channel quality of the target network device and/or the source network device meets the switching condition not only means that the measured value of the channel quality of the target network device and/or the source network device meets a condition, such as the first condition, but also refers to the target network
  • the measurement value of the channel quality of the device and/or the source network device satisfies the first condition for a duration that reaches a trigger time. After the trigger time is reached, the terminal device can initiate a handover to the target network device.
  • the handover condition includes not only the first condition, but also the first trigger time TTT1, and the channel quality of the target network device and/or the source network device meets the handover condition, including: the target network The measurement value of the channel quality of the device and/or the source network device satisfies the first condition for a duration that reaches the TTT1.
  • the terminal device may also initiate handover to the target network device immediately when it is determined that the channel quality measurement value of the target network device and/or the source network device meets the first condition, that is, the handover condition does not include the first condition.
  • the trigger time TTT1 may also mean that TTT1 included in the switching condition is 0.
  • the terminal device does not send the RRC connection reconfiguration complete message for the received RRC connection reconfiguration message to the source network device, to Avoid unnecessary signaling overhead.
  • the terminal device can immediately check the channel quality of the target network device and/or the source network device when it receives the RRC connection reconfiguration message carrying the conditional switching command and the switching condition for the first time. Perform measurement and determine that the obtained measurement value satisfies the first condition. Further, it can continue TTT1 when the first condition is met, then the terminal device can initiate a handover to the target network device, and not to the source network device Send the RRC connection reconfiguration complete message.
  • the implementation of this embodiment is shown in Figure 5, where the conditional switching command is carried in the RRC connection reconfiguration message.
  • the terminal device receives the measurement configuration information sent by the source network device in advance, and the terminal device always performs measurement according to the configuration in the measurement configuration information, and the terminal device receives the RRC connection carrying the conditional switching command and the switching condition
  • the terminal device may consider that the measured value of the channel quality of the source network device and/or the target network device satisfies the first condition in the handover condition.
  • the first condition in the measurement configuration information is that the measured value of the channel quality of the neighboring cell is higher than a decision threshold.
  • the terminal device After the terminal device receives the measurement configuration information, it always measures the channel quality of the neighboring cell, and the terminal device receives When the conditional handover command and handover conditions are reached, it is determined that the measured value of the channel quality of the neighboring cell satisfies the first condition in the measurement configuration information, and the terminal device finds that the neighboring cell is exactly where the network device that sends the conditional handover command is located.
  • the cell ie, the target network device in this document
  • the first condition in the measurement configuration information is the same as the first condition in the handover command.
  • the terminal device can determine that the measured value of the channel quality of the target network device satisfies the first condition in the handover condition, and further, the measured value of the channel quality of the target network device can continue TTT1 when the first condition is satisfied.
  • the terminal device can initiate a handover to the target network device, and does not send an RRC connection reconfiguration complete message to the source network device.
  • the implementation of this embodiment is shown in FIG. 6.
  • the terminal device may also perform measurement in advance based on the first condition in the received measurement configuration information, for example, the first condition is that the measured value of the channel quality of the neighboring cell is higher than an absolute threshold.
  • the first condition is that the measured value of the channel quality of the neighboring cell is higher than an absolute threshold.
  • the terminal device finds that this neighboring cell is just the cell where the network device sending the conditional handover command is located (that is, the target network device in this document), and the first condition in the measurement configuration information is the same as the first condition in the handover command.
  • the terminal device performs measurement according to the measurement configuration information sent by the network side.
  • a certain trigger condition (the first condition)
  • the terminal device also needs to evaluate the measurement report. If the report condition is met, the terminal device needs to check the network side. Report the measurement report.
  • the terminal device performs measurement based on the measurement configuration information and determines that the first condition is satisfied, but the purpose is to determine that the channel quality measurement value of the target network device and/or the source network device meets the first condition, and Furthermore, it initiates a handover to the target network device according to the continuous TTT1. Therefore, the reporting of the measurement report is unnecessary, that is, the measured value of the channel quality of the target network device and/or the source network device meets the measurement configuration information. Under the first condition, the terminal device may not send the measurement report for the measurement configuration information to the source network device. Therefore, the signaling overhead can be further reduced.
  • TTT1 is included in the handover condition, and is used to trigger the terminal device to initiate a handover to the target network device. Specifically, when the channel quality of the target network device and/or the source network device is measured The duration of the value satisfying the first condition reaches TTT1, which triggers the terminal device to initiate a handover to the target network device.
  • TTT2 is included in the measurement configuration information and is used to trigger the reporting of the measurement report. Specifically, when the terminal device performs measurement based on the measurement configuration information and the duration of satisfying the first condition reaches TTT2, the terminal device is triggered to send a measurement report to the source network device.
  • TTT2 may be greater than or equal to TTT1.
  • the terminal device determines that the first condition in the measurement configuration information has been met, the terminal device can start TTT1 and TTT2. In the entire duration of TTT1, the first conditions in the measurement configuration information are all met.
  • TTT1 is reached, In other words, the terminal device can be triggered to initiate a handover to the target network device.
  • the terminal device does not report the measurement report to the source network device.
  • TTT1 in the embodiment of the present application can start from the first condition in the measurement configuration information being satisfied, or it can start from receiving the RRC connection reconfiguration message carrying the condition switching command and the switching condition, and the end of TTT1 can be with
  • the end of TTT2 is the same, or the start and end of TTT1 can also completely coincide with the start and end of TTT2.
  • TTT2 may be smaller than TTT1.
  • the terminal device determines that the first condition in the measurement configuration information is satisfied, the terminal device can start TTT1 and TTT2. Within the entire duration of TTT1, the first conditions in the measurement configuration information are all satisfied.
  • TTT1 is reached, That is to say, the terminal device can be triggered to initiate a handover to the target network device, and because TTT2 has been reached before, that is, the report of the measurement report is satisfied, but the terminal device also does not report the measurement report to the source network device.
  • the terminal device when reaching TTT2, the terminal device needs to further determine that the measured value of the channel quality of the target network device and/or the source network device that meets TTT2 to not meet TTT1 (ie, TTT1-TTT2) meets the first condition, Therefore, when TTT1 is reached, the terminal device can be triggered to initiate a handover to the target network device.
  • the start of TTT1 can also start from receiving an RRC connection reconfiguration message carrying conditional switching commands and switching conditions, then triggering the terminal device to initiate switching to the target network device has nothing to do with TTT2, but when it reaches TTT2, the terminal The device does not report measurement reports to the source network device.
  • the terminal device can maintain a timer, and when the timer expires, the terminal device reports the measurement report to the network device.
  • the terminal device determines that the channel quality of the target network device and/or the source network device meets the switching condition before the timer expires, then the terminal device can initiate a switch to the target network device at this time, and does not Send a measurement report to the source network device.
  • the terminal device has determined that the channel quality measurement value of the target network device and/or the source network device meets the first condition and has not yet reached TTT1, then similarly, when the timing for reporting the measurement report When the timer times out, the terminal device does not send a measurement report to the source network device.
  • the terminal device may also suspend the signaling radio bearer, and/or its related wireless link Road control (Radio Link Control, RLC)/Packet Data Convergence Protocol (PDCP) entity.
  • RLC Radio Link Control
  • PDCP Packet Data Convergence Protocol
  • the terminal device may also reset the SRB and/or its related RLC/PDCP entity.
  • multiple target network devices may configure condition switching commands to the terminal device, and the multiple target network devices may share a switching condition or may respectively correspond to a switching condition.
  • conditional switching commands and switching conditions of multiple target network devices may be carried in one RRC connection reconfiguration message, or may be sent in multiple pieces.
  • 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 500 according to an embodiment of the present application.
  • the terminal device 500 includes:
  • the transceiver unit 510 is configured to receive a radio resource control RRC connection reconfiguration message sent by a source network device;
  • the processing unit 520 is configured to initiate a switch to the target network device and not send to the source network device based on a conditional switch command when the channel quality of the target network device and/or the source network device meets the switching condition An RRC connection reconfiguration complete message for the RRC connection reconfiguration message.
  • the RRC connection reconfiguration message includes the conditional switching command.
  • the RRC connection reconfiguration message includes the handover condition, and the handover condition includes a first condition and a first trigger time, and the target network device and/or the source network
  • the channel quality of the device meeting the handover condition includes: the measurement value of the channel quality of the target network device and/or the source network device satisfies the first condition for a duration that reaches the first trigger time.
  • the processing unit is further configured to: in the case of receiving the RRC connection reconfiguration message, check the channel quality of the target network device and/or the source network device Performing measurement; determining that the measured value of the channel quality of the target network device and/or the source network device meets the first condition.
  • the processing unit is further configured to: before the terminal device receives the RRC connection reconfiguration message, determine that the first condition is satisfied.
  • the transceiver unit is further configured to: before the transceiver unit receives the RRC connection reconfiguration message, receive measurement configuration information sent by the source network device, and the measurement The configuration information includes the first condition.
  • the measurement configuration information includes a second trigger time
  • the first trigger time is used to trigger the terminal device to initiate a handover to the target network device
  • the second trigger time For triggering the reporting of a measurement report, the processing unit is further configured to: when the first trigger time is met and/or the second trigger time is met, not to send the measurement report to the source network device Configuration information measurement report.
  • the second trigger time is greater than or equal to the first trigger time.
  • the second trigger time is less than the first trigger time.
  • the processing unit is further configured to: in a case where the second trigger time is satisfied, determine that between the second trigger time and the first trigger time is not met The measured value of the channel quality of the target network device and/or the source network device meets the first condition.
  • the processing unit is further configured to: suspend the signaling radio bearer when the channel quality of the target network device and/or the source network device meets the handover condition SRB and/or the radio link control RLC/packet data convergence protocol PDCP entity corresponding to the SRB, or when the channel quality of the target network device and/or the source network device meets the handover condition, Reset the SRB and/or the RLC/PDCP entity corresponding to the SRB.
  • the terminal device of the embodiment of the present application can first determine whether the channel quality meets the handover condition after receiving the RRC connection reconfiguration message when conditional handover is configured, and directly performs handover if the handover condition is met Therefore, there is no need to send the corresponding RRC connection reconfiguration complete message to the network side, and the signaling overhead is reduced.
  • FIG. 10 is a schematic structural diagram of a terminal device 600 provided by an embodiment of the present application.
  • the terminal device 600 shown in FIG. 10 includes a processor 610, and the processor 610 can call and run a computer program from the memory to implement the method in the embodiment of the present application.
  • the terminal device 600 may further include a memory 620.
  • the processor 610 may call and run a computer program from the memory 620 to implement the method in the embodiment of the present application.
  • the memory 620 may be a separate device independent of the processor 610, or may be integrated in the processor 610.
  • the terminal device 600 may further include a transceiver 630, and the processor 610 may control the transceiver 630 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 630 may include a transmitter and a receiver.
  • the transceiver 630 may further include an antenna, and the number of antennas may be one or more.
  • FIG. 11 is a schematic structural diagram of a chip of an embodiment of the present application.
  • the chip 700 shown in FIG. 11 includes a processor 710, and the processor 710 can call and run a computer program from the memory to implement the method in the embodiment of the present application.
  • the chip 700 may further include a memory 720.
  • the processor 710 may call and run a computer program from the memory 720 to implement the method in the embodiment of the present application.
  • the memory 720 may be a separate device independent of the processor 710, or may be integrated in the processor 710.
  • the chip 700 may further include an input interface 730.
  • the processor 710 may control the input interface 730 to communicate with other devices or chips, and specifically, may obtain information or data sent by other devices or chips.
  • the chip 700 may further include an output interface 740.
  • the processor 710 can control the output interface 740 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 terminal device in the embodiment of the present application, and the chip can implement the corresponding process implemented by the terminal device in the various methods of the embodiment of the present application.
  • the chip can implement the corresponding process implemented by the terminal device in the various methods 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.
  • FIG. 12 is a schematic block diagram of a communication system 800 according to an embodiment of the present application. As shown in FIG. 12, the communication system 800 includes a terminal device 810 and a network device 820.
  • the terminal device 810 can be used to implement the corresponding function implemented by the terminal device in the above method
  • the network device 820 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 .

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Les modes de réalisation de la présente invention concernent un procédé de commutation de dispositifs de réseau et un dispositif terminal. Le procédé comprend les étapes au cours desquelles : le dispositif terminal reçoit un message de reconfiguration de connexion de commande de ressources radio (RRC) envoyé par un dispositif de réseau source ; et, lorsque la qualité de canal d'un dispositif de réseau cible et/ou du dispositif de réseau source satisfait une condition de commutation, sur la base d'une instruction de commutation sous condition, le dispositif terminal initie des commutations vers le dispositif de réseau cible et n'envoie pas de message d'achèvement de reconfiguration de connexion RRC associé au message de reconfiguration de connexion RRC au dispositif de réseau source. Le procédé et le dispositif terminal d'après les modes de réalisation de la présente invention ont l'avantage de réduire un surdébit de signalisation.
PCT/CN2019/094932 2019-07-05 2019-07-05 Procédé de commutation de dispositifs de réseau et dispositif terminal WO2021003616A1 (fr)

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