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WO2020134680A1 - 一种小区变更方法及装置、存储介质、终端 - Google Patents

一种小区变更方法及装置、存储介质、终端 Download PDF

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Publication number
WO2020134680A1
WO2020134680A1 PCT/CN2019/118753 CN2019118753W WO2020134680A1 WO 2020134680 A1 WO2020134680 A1 WO 2020134680A1 CN 2019118753 W CN2019118753 W CN 2019118753W WO 2020134680 A1 WO2020134680 A1 WO 2020134680A1
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WO
WIPO (PCT)
Prior art keywords
cell
rrc
measurement
terminal
request message
Prior art date
Application number
PCT/CN2019/118753
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English (en)
French (fr)
Inventor
韩立锋
沈兴亚
Original Assignee
展讯通信（上海）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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Publication date
Application filed by 展讯通信（上海）有限公司 filed Critical 展讯通信（上海）有限公司
Priority to EP19902400.1A priority Critical patent/EP3905837A4/en
Priority to US17/418,011 priority patent/US20220095177A1/en
Publication of WO2020134680A1 publication Critical patent/WO2020134680A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/27—Transitions between radio resource control [RRC] states
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/14—Spectrum sharing arrangements between different networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H04B17/318—Received signal strength
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/08—Testing, supervising or monitoring using real traffic
    • 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
    • H04W36/0079—Transmission or use of information for re-establishing the radio link in case of hand-off failure or rejection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/00838—Resource reservation for handover
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—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
    • H04W36/0088—Scheduling hand-off measurements
    • 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
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/20—Selecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/18—Management of setup rejection or failure
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/249—Reselection being triggered by specific parameters according to timing information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]

Definitions

  • the present invention relates to the technical field of wireless communication, and in particular to a cell change method and device, storage medium, and terminal.
  • the 3rd Generation Partnership Project (3GPP) standards organization will study how to deploy the 5th generation of mobile communications (The 5F) on the unlicensed spectrum.
  • New Radio (New Radio) NR) system so as to achieve the purpose of fair and effective use of unlicensed spectrum and improve the data transmission rate of the NR system.
  • the NR system uses unlicensed spectrum technology, also known as New Radio Access Unlicensed (New RAT Unlicense, NR-U) technology.
  • LBT Listen-Before-Talk
  • CCA Clear Channel Assessment
  • the fixed frame is composed of a channel occupation time (Channel Occupancy Time, referred to as COT) and an idle period (Idle period), wherein the channel occupation time is 1 millisecond (msillisecond, referred to as ms) to 10ms, and the minimum idle period is the channel occupation time 5%.
  • COT Channel Occupancy Time
  • Idle period idle period
  • user equipment (UE) states include Radio Resource Control-Idle (RRC-IDLE) state, RRC inactive (RRC-Inactive) state, and RRC connection (RRC) -Connected) state.
  • RRC-IDLE Radio Resource Control-Idle
  • RRC-Inactive RRC inactive
  • RRC connection RRC connection resume process
  • LBT is required for RRC connection establishment or RRC connection continuation. After the LBT successfully obtains the right to use channel resources, it can send related RRC messages to achieve RRC connection establishment or RRC connection continuation. If the UE fails to perform LBT continuously (for example, LBT fails more than 4 times), the UE cannot enter the RRC connected state, which will cause subsequent transmission of data or signaling failure.
  • the technical problem solved by the present invention is how to improve the RRC connection success rate in the case of continuous failure of the unlicensed spectrum LBT, so as to effectively solve the RRC connection failure problem.
  • an embodiment of the present invention provides a cell change method, including: performing an operation of listening first and then speaking based on unlicensed spectrum resources; if the operation of listening first and then speaking continues to fail, then cell selection or cell reselection is performed.
  • the cell change method before performing cell selection or cell reselection, the cell change method further includes: measuring a cell, the cell including one or more of the following: an intra-frequency cell, an inter-frequency cell, and an inter-system cell.
  • the measuring the cell includes: based on the received signal strength indication of the cell, determining whether to start the measurement or stop the measurement for the cell; and measuring the cell where the measurement is started or not stopped.
  • the determining whether to start measurement or stop measurement for the cell based on the received signal strength indication of the cell includes: if the value of the received signal strength indication of the cell exceeds a first preset threshold, terminate or The measurement of the cell is not started.
  • the cell change method further includes: when performing cell selection or cell reselection, determining a cell whose value of the received signal strength indication is lower than a second preset threshold as a candidate target cell.
  • the measuring the cell includes: preferentially measuring cells of different frequencies and cells of different systems.
  • the measuring the cell includes: receiving a measurement type configured by the network, the measurement type including one or more of the following: co-frequency measurement, inter-frequency measurement, and inter-system measurement; the operation is continuous after listening first After the failure event occurs, the cell is measured using the measurement type.
  • performing cell selection or cell reselection includes: if the RRC establishment request message or the RRC recovery request message or the RRC recovery request message 1 is sent, the first listen and then talk If the operation fails continuously, the cell reselection is performed; if the RRC establishment complete message or the RRC recovery complete message is sent, and the operation fails after listening first and then saying, the cell selection is performed.
  • the cell change method further includes: if accessing from the current cell to the target cell, sending an RRC establishment request message or an RRC recovery request message or an RRC recovery request message 1 to the network to complete the RRC connection; where the sent RRC establishment request message or RRC recovery request message or RRC recovery request message 1 includes: an indicator, which is used to indicate that an event of continuous LBT failure has occurred.
  • the cell changing method further includes: setting an access control access category.
  • the cell change method before performing cell selection or cell reselection, the cell change method further includes: if during the RRC connection restoration process initiated by the RNA update, the operation fails after listening first and then setting the value of pending RNA update True.
  • the cell change method further includes: if accessing from the current cell to the target cell based on cell selection, then performing an RRC connection recovery process based on the target cell, to Perform RNA updates.
  • the performing the RRC connection recovery process to perform the RNA update includes sending an RRC recovery request message or an RRC recovery request 1 message, and the RRC recovery request message or RRC recovery request message 1 includes indication information and the indication The information is used to indicate that the RNA update is a pending RNA update.
  • an embodiment of the present invention also provides a cell change device, including: a first execution module adapted to perform a listen-before-talk operation based on an unlicensed spectrum; a second execution module, if performing a listen-before-talk operation If it fails continuously, the second execution module is adapted to perform cell selection or cell reselection.
  • an embodiment of the present invention further provides a storage medium on which computer instructions are stored, and the steps of the above cell change method are executed when the computer instructions run.
  • an embodiment of the present invention further provides a terminal, including a memory and a processor, the memory stores computer instructions that can run on the processor, and when the processor runs the computer instructions Perform the steps of the above cell change method.
  • An embodiment of the present invention provides a cell change method, including: performing a listen-before-talk operation based on an unlicensed spectrum; if the listen-before-talk operation continues to fail, cell selection or cell reselection is performed.
  • the technical solution provided by the embodiment of the present invention may use cell selection or cell reselection to obtain a suitable cell, thereby re-executing LBT.
  • the RRC connection can be performed after obtaining a suitable cell, to provide a feasible solution for the RRC connection, which is beneficial to effectively solve the RRC connection failure problem and improve the RRC connection success rate and network performance.
  • the method further includes: measuring a cell, the cell including one or more of the following: an intra-frequency cell, an inter-frequency cell, and an inter-system cell.
  • the cell measurement can be used to preliminarily determine the interference situation of each cell, thereby providing the possibility of selecting a suitable cell, which is beneficial to effectively avoid subsequent LBT failures.
  • the method further includes: if during the RRC connection restoration process initiated by the RNA update, the operation is successively failed after listening and then setting the value of pending RNA update to true.
  • a pending RNA update procedure may be performed until the conditions are met (for example, timer T302 or timer T390 times out or Stop) to initiate the RRC connection recovery process again, so that the RNA update procedure can be completed, which is beneficial to overcome the impact of continuous LBT failure on RNA update.
  • the performing the RRC connection recovery process to perform the RNA update includes sending an RRC recovery request message or an RRC recovery request 1 message.
  • the RRC recovery request message or RRC recovery request message 1 includes instruction information, which is used for Instructing that the RNA update is to suspend RNA update.
  • FIG. 1 is a schematic flowchart of a cell change method according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of signaling interaction in a typical scenario according to an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of signaling interaction in yet another typical scenario of an embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of a cell change apparatus according to an embodiment of the present invention.
  • the existing technology only repeats LBT. If the LBT fails continuously, in a scenario where the load or interference of the cell is relatively large, it may cause the UE to perform RRC connection establishment or RRC connection continuation process, and may continue to fail. .
  • the continuous failure of LBT may refer to a terminal performing an LBT operation, the number of consecutive failures of LBT exceeds a preset number of times, or the number of consecutive failures of LBT exceeds a preset threshold within a preset time period.
  • the preset number of times, the preset time period and the preset threshold of continuous failure of LBT may be configured by the network side, through dedicated messages (for example, RRC signaling) or public messages (System Information, referred to as SI, also known as system information ) Notify the terminal.
  • the preset number of consecutive failures of configuring LBT on the network side may be 8 times. Under this condition, if the LBT fails 8 times in succession, it means that the terminal has continuously failed LBT.
  • the preset number of consecutive failures of configuring LBT on the network side may be 8 times, and the time threshold is 10s. Under this condition, if the LBT fails continuously 8 times within 10 s, it means that the terminal has continuously failed LBT.
  • An embodiment of the present invention provides a cell change method, including: performing a listen-before-talk operation based on an unlicensed spectrum; if the listen-before-talk operation continues to fail, cell selection or cell reselection is performed.
  • the technical solution provided by the embodiment of the present invention may use cell selection or cell reselection to obtain a suitable cell, thereby re-executing LBT.
  • the RRC connection can be performed after obtaining a suitable cell, to provide a feasible solution for the RRC connection, which is beneficial to effectively solve the RRC connection failure problem and improve the RRC connection success rate and network performance.
  • the present embodiment is applicable to 5G NR communication systems, 4G and 3G communication systems, and various communication systems that evolve in the future, such as 6G and 7G.
  • the present embodiment is also applicable to different network architectures, including but not limited to relay network architecture, dual link architecture, and vehicle-to-everything communication architecture.
  • the network side described in the embodiment of the present invention may include a 5G new core network (new core or 5G New Core, 5G-CN for short), or a next generation core network (Next Generation Core, NGC for short), and so on.
  • the 5G-CN is independent of the existing core network, such as the Evolved Packet Core (Evolved Packet Core, EPC for short).
  • the network side in the embodiment of the present invention may refer to a base station (BS for short) of a wireless access network, and may also include a network element in a core network.
  • the base station may also be called a base station device, and is a device deployed in a wireless access network to provide wireless communication functions.
  • devices that provide base station functions in a 2G network include: Base Transceiver Station (Base Transceiver Station, BTS for short) and Base Station Controller (Base Station Controller, BSC for short).
  • the devices that provide base station functions in the 3G network include: NodeB and Radio Network Controller (Radio Network Controller, RNC for short).
  • the equipment that provides base station functions in the 4G network includes: Evolved (NodeB, eNB for short).
  • the device that provides the function of a base station is an access point (Access Point, AP for short).
  • the equipment that 5GNR provides base station functions includes: the NodeB (gNB) that continues to evolve, and the equipment that provides base station functions in new communication systems in the future.
  • gNB NodeB
  • the terminal in the embodiment of the present invention may refer to various forms of UE, access terminal, subscriber unit, subscriber station, mobile station, mobile station (MS), remote station, remote terminal, mobile device, user terminal, Terminal equipment (terminal equipment), wireless communication equipment, user agent or user equipment.
  • Terminal devices can also be cellular phones, cordless phones, Session Initiation Protocol (SIP) phones, wireless local loop (Wireless Local Loop) stations, personal digital processing (Personal Digital Assistant (PDA), Hand-held devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in future 5G networks or public land mobile communication networks (Public Land Mobile Network, abbreviated in the future) PLMN) terminal equipment, etc., this embodiment of the present invention is not limited thereto.
  • SIP Session Initiation Protocol
  • PDA Personal Digital Assistant
  • Hand-held devices computing devices or other processing devices connected to wireless modems
  • in-vehicle devices wearable devices
  • terminal devices in future 5G networks or public land mobile communication networks Public Land Mobile Network, abbreviated in the future PLMN
  • Multiple appearing in the embodiments of the present invention refers to two or more than two.
  • connection appearing in the embodiment of the present invention refers to various connection methods such as direct connection or indirect connection, so as to realize communication between devices, and the embodiment of the present invention does not make any limitation on this.
  • the "network” and "system” appearing in the embodiments of the present invention express the same concept, and the communication system is a communication network.
  • FIG. 1 is a schematic flowchart of a cell change method according to an embodiment of the present invention.
  • the cell change method may be applied to a terminal side, for example, executed by an NR UE.
  • the cell change method may include the following steps:
  • Step S101 Perform an operation of listening before speaking based on the unlicensed spectrum resource
  • step S102 if the operation of listening first and then talking continues to fail, cell selection or cell reselection is performed.
  • terminals are deployed in unlicensed spectrum resources.
  • the terminal may perform LBT in the unlicensed spectrum resource to enter the RRC connected state in the RRC idle state, or enter the RRC connected state in the RRC inactive state. After the UE fails to execute LBT for the first time, the UE may execute LBT again.
  • step S102 if the terminal continuously fails to perform LBT, the terminal may try to select another cell to perform LBT again to enter the RRC connected state from the RRC idle state or the RRC inactive state.
  • the continuous failure of LBT means that the LBT is executed more than twice, and each LBT process fails.
  • the terminal may perform cell selection or cell reselection to achieve RRC connection.
  • the terminal may measure the cell to select a target cell with less interference as much as possible, which is beneficial for subsequent LBT to successfully compete for spectrum resources.
  • the measurement of the cell may include one or more of intra-frequency cell measurement, inter-frequency cell measurement, and inter-system cell measurement. Since the interference of the same frequency cell may also be very large, in order to increase the success probability of subsequent LBT competition, the terminal may preferentially select a different frequency cell and/or a different system cell for measurement. Among them, the heterogeneous system refers to other wireless communication systems different from the NR-U system.
  • the terminal may receive the measurement configuration information configured by the terminal from the network side.
  • the measurement configuration information may indicate a measurement type that the terminal starts after an LBT continuous failure event occurs: one or more of co-frequency measurement, inter-frequency measurement, and inter-system measurement.
  • the network side may notify the terminal of the measurement configuration information through dedicated RRC signaling or system information.
  • the terminal may perform the measurement operation of cell reselection or cell selection according to the measurement configuration information.
  • the terminal may decide whether to terminate or not to start certain measurements according to received signal strength indicators (Received Signal Strength Indicator (RSSI) for different frequencies or different systems). Further, when performing cell selection or cell reselection, the terminal may determine the cell whose RSSI value is lower than the second preset threshold as the candidate target cell.
  • RSSI Received Signal Strength Indicator
  • the terminal may terminate or not start the measurement of the inter-frequency cell.
  • the terminal may also terminate or not start the measurement of the foreign system cell.
  • the terminal may determine the inter-frequency cell as a candidate target cell, and select a cell from the candidate target cells according to the cell selection rule or the cell reselection rule As a target cell, the terminal leaves the current cell and camps on the target cell.
  • the cell selection rule may be to select a cell with the strongest signal quality on the frequency whose RSRP is higher than a certain threshold and the Reference Signal Received Quality (RSRQ) is higher than a certain threshold.
  • RNA Radio access network-based Notification Area
  • the terminal can link the variable The value of pendingRnaUpdate is set to TRUE.
  • the variable pendingRnaUpdate may indicate whether there is a pending RNA update program.
  • the RRC idle terminal After continuous failure of LBT, the RRC idle terminal performs cell reselection or cell selection.
  • the RRC idle terminal initiates the RRC connection establishment process, and may first send an RRC Setup Request (RRCSetupRequest) message. If LBT consecutive failure occurs when sending the RRCSetupRequest message, the terminal may perform cell reselection to select the target cell. Further, if the terminal sends an RRC Setup Complete (RRCSetupComplete) message and a continuous LBT failure occurs, the terminal may also perform cell selection to reselect the target cell.
  • RRCSetupRequest RRC Setup Request
  • RRCSetupComplete RRC Setup Complete
  • the terminal in order to send an RRCSetupRequest message, the terminal needs to perform an LBT operation. If an event of continuous LBT failure occurs, the terminal may measure at least one of the same-frequency cell, inter-frequency cell, and different-system cell. For example, regardless of the limitation of the signal quality of the serving cell, the same-frequency cell, inter-frequency cell, and different-system cell are directly measured to perform cell reselection.
  • the terminal in the RRC idle state starts the measurement for cell reselection, it can preferentially select the inter-frequency cell and the inter-system cell measurement. If a continuous LBT failure event occurs, it means that the interference of the same-frequency neighboring cell may also be very large. Therefore, in order to reduce the probability of subsequent LBT failure, the terminal may prefer to measure the inter-frequency cell and the inter-system cell.
  • the terminal in the RRC idle state may decide to terminate the measurement of a certain cell or certain cells according to the RSSI of different frequencies or systems. For example, if the RSSI value of a different frequency band exceeds a preset threshold x, the terminal may terminate the different frequency Cell measurement. Alternatively, the terminal in the RRC idle state may decide not to enable measurement of a certain cell or certain cells according to the RSSI of different frequencies or systems. For example, if the RSSI value of a different frequency band exceeds a preset threshold x, the terminal may terminate or not Start the measurement of a certain inter-frequency cell or some inter-frequency cells.
  • the different frequency band may be an unlicensed spectrum resource.
  • the network side may notify the terminal in advance of the preset threshold x through dedicated RRC signaling or system information.
  • the network side may pre-configure the measurement type for the RRC idle state terminal operating on the unlicensed spectrum resource, so that the terminal can start co-frequency, inter-frequency, and/or inter-system measurement after the LBT continuous failure event occurs.
  • the network side can notify the terminal in advance of the measurement type started after the LBT continuous failure event through dedicated RRC signaling or system information. After the LBT continuous failure event occurs, the terminal starts measurement corresponding to the measurement type, which is used for cell reselection.
  • the terminal may perform cell selection to perform the RRC connection reestablishment process.
  • the terminal may preferentially select an inter-frequency cell or an inter-system cell to avoid LBT failure as much as possible.
  • the terminal may select a cell whose RSSI value is lower than a preset threshold y.
  • the preset threshold y may be used in the frequency band of the unlicensed spectrum.
  • the network side may notify the terminal in advance of the preset threshold y through dedicated RRC signaling or system information.
  • the RRC inactive terminal After continuous failure of LBT, the RRC inactive terminal performs cell reselection or cell selection.
  • the terminal may perform cell reselection to select a target cell.
  • RRC connection recovery message RRCResumeRequest or RRCResumeRequest1
  • RRC recovery complete RRCResumeComplete
  • the terminal when the RRC inactive terminal initiates the RRC connection recovery process, in order to send the RRCResumeRequest message or RRCResumeRequest1 message, an LBT operation is required. If the LBT fails continuously, the terminal may start at least one cell measurement in the same frequency, different frequency, and different systems. That is, regardless of the limitation of the signal quality of the serving cell, the event of continuous failure of LBT triggers the terminal to perform cell reselection. In this case, the terminal status is still RRC inactive.
  • the terminal may preferentially measure different frequencies and different systems. This is mainly due to the fact that the interference of adjacent cells in the same frequency may also be large, and the probability of LBT failure events is high.
  • the terminal may decide to terminate or not start certain measurements according to the RSSI of different frequencies or systems. For example, if the RSSI value of a different frequency band exceeds a predetermined threshold x, the terminal may terminate or not start the measurement of the different frequency band.
  • the different frequency band may be an unlicensed spectrum resource.
  • the network side may notify the terminal in advance of the preset threshold x through dedicated RRC signaling or system information.
  • the network side may pre-configure the terminal with a dedicated RRC signaling or system information to measure the type of measurement that the terminal can start after the LBT continuous failure event occurs, such as one or more of the same frequency cell, inter-frequency cell, and different-system cell. item.
  • the measurement can be used for cell reselection.
  • the terminal may perform cell selection to complete RRC link reestablishment.
  • the terminal state is the RRC connected state.
  • the terminal may prefer to select a different frequency cell or a different system cell for RRC connection re-establishment to avoid LBT failure as much as possible.
  • the terminal may select a cell whose RSSI value is lower than a preset threshold y.
  • the preset threshold y may be used in the frequency band of the unlicensed spectrum.
  • the network side may notify the terminal in advance of the preset threshold y through dedicated RRC signaling or system information.
  • triggering cell reselection or cell selection through the terminal in the RRC idle state and the RRC inactive state can enable the terminal to select a suitable cell for RRC connection establishment, which is beneficial to improve the subsequent establishment of the terminal
  • the success probability of RRC connection improves network performance.
  • the terminal After the terminal enters the target cell from the current cell through cell reselection or cell selection, it may choose to camp on the target cell.
  • the terminal may initiate an RRC connection establishment or RRC connection recovery process in the target cell.
  • the terminal may add an indicator to indicate that an event of continuous LBT failure has occurred.
  • the indicator may be a cause value, which means "an event of continuous failure of LBT", and a cause value of the "event of consecutive failure of LBT" indicates that the terminal initiates RRC in the cell where the target cell resides before During the connection establishment or RRC connection recovery process, an event of continuous failure of LBT occurs, thereby causing the terminal to perform cell reselection or cell selection, and enter the target cell.
  • the network side After receiving the RRCSetupRequest message, RRCResumeRequest message, or RRCResumeRequest1 message, the network side can perform special processing on the terminal in radio resource management according to the cause value "LBT continuous failure event". For example, relaxing the access cell condition so that the terminal can access the target cell, reducing the rejection of RRC connection requests containing the cause value "LBT continuous failure event occurred", and so on.
  • the terminal may set the access category of the access control (Access Category), so that When the terminal performs access control, it can successfully access with a high probability.
  • Access Category the access category of the access control
  • the terminal may set the access category to category 2 or category 0 so that it can pass the access control.
  • the terminal adds an indicator indicating "an event of continuous LBT failure" to the RRCSetupRequest message, RRCResumeRequest message, and/or RRCResumeRequest1 message, so that the network side is informed of the event that has occurred on the terminal, and then can better perform radio resources according to the terminal situation Management, to reduce the adverse impact of the terminal on the RRC connection management due to continuous LBT failure events.
  • the terminal in the RRC inactive state initiates the RRC connection recovery process due to the RNA update.
  • the terminal may set the value of the variable pendingRnaUpdate to true to indicate that there is a pending RNA update procedure.
  • the terminal may initiate the RRC connection recovery process again when certain conditions are met.
  • the certain condition may be a delay for a period of time, or the blocking of the access category for RNA update in access control becomes lighter (for example, timer T302 times out or stops, timer T390 times out or stops), or other conditions, here No constraints.
  • the terminal in the RRC inactive state may initiate an RRC connection recovery process in the target cell.
  • the terminal may initiate RRC connection recovery in the target cell to perform RNA update.
  • the terminal may carry indication information in the RRCResumeRequest message or RRCResumeRequest1 message, and the indication information may be used to indicate that the initiated RNA update is a pending RNA update.
  • the signaling interaction between the terminal (for example, user equipment) and the network (for example, NR base station) using the embodiments of the present invention will be further described below in conjunction with typical application scenarios.
  • the base station to which cell 1 belongs may first perform operation s1, that is, advance to user equipment 1 Send measurement configuration information.
  • the measurement configuration information may be used to indicate the type of measurement that the user equipment 1 can start after the LBT continuous failure event occurs.
  • the user equipment 1 performs operation s2, that is, enters the RRC idle state or the RRC inactive state; or the UE is in the RRC idle state or the RRC inactive state, and obtains the measurement configuration information sent by the network 2 through the system information;
  • the user equipment 1 wants to transmit data, and performs operation s3, that is, performs LBT, and the LBT continuously fails;
  • the user equipment 1 performs operation s4, that is, performs cell measurement based on the measurement configuration information;
  • the user equipment 1 performs operation s5, that is, the user equipment 1 performs cell reselection or cell selection, leaves from cell 1, and camps on cell 2;
  • the user equipment performs operation s6, that is, the user equipment 1 sends the RRCSetupRequest message, the RRCResumeRequest message, or the RRCResumeRequest1 message in the cell 2, adding an indicator indicating that an event of continuous LBT failure has occurred;
  • the user equipment performs operation s7, that is, the user equipment 1 sets an access category to increase the probability of success in subsequent LBT competition;
  • the base station to which cell 2 belongs performs operation s8, that is, sends messages in the process of RRC connection establishment, RRC connection re-establishment, RRC connection resume, including RRCsetup message, RRCReestablishment message, RRCResume message, RRCRelease message News, RRCRejec news and other one of the news;
  • the user equipment 1 performs operation s9, that is, the user equipment 1 sends an RRCSetupComplete message or an RRCReestablishmentComplete message or an RRCResumeComplete message. At this point, the user equipment 1 enters the RRC connected state from the RRC idle state or the RRC inactive state.
  • the user equipment 1 accesses the cell 1 in the network 2, it enters the RRC inactive state; afterwards, if the user equipment 1 needs to perform the RRC connection recovery process for RNA update, Then, the user equipment 1 may perform operation s1, that is, perform LBT to send the RRCResumeRequest message or the RRCResumeRequest1 message;
  • the user equipment 1 may perform operation s2, that is, set the value of the variable pendingRnaUpdate to true;
  • the user equipment 1 may perform operation s3, that is, when a certain condition is met, the user equipment 1 initiates an RRC connection recovery process in the cell 1 again, and the certain condition may be delay of a certain time or access to RNA update in access control
  • the type of blocking becomes lighter (for example, the timer T302 times out or stops, and the timer T390 times out or stops) or other conditions;
  • the user equipment 1 may perform operation s4, that is, perform cell selection or cell reselection, leave from cell 1, and camp on cell 2;
  • the user equipment 1 may perform operation s5, that is, the user equipment 1 sends an RRCResumeRequest message or RRCResumeRequest1 message in the cell 2, and the RCRResumeRequest message or RRCResumeRequest1 message carries indication information, and the indication information may be used to indicate that the initiated RNA update is Suspend RNA updates.
  • the cell 2 After receiving the RRC message sent by the user equipment 1, the cell 2 performs operation s6, that is, sends the RRCResume message;
  • the user equipment 1 performs operation s7, that is, the user equipment 1 sends an RRCResumeComplete message. At this point, the user equipment 1 can enter the RRC connected state from the RRC inactive state.
  • the terminal may camp on another cell by performing cell selection or cell reselection. Further, the terminal may re-perform the RRC connection establishment process or the RRC connection recovery process, and enter the RRC connection state from the RRC idle state or the RRC inactive state.
  • the cell change device 4 is a schematic structural diagram of a cell change apparatus according to an embodiment of the present invention.
  • the cell change device 4 may be executed by the terminal to implement the technical solution of the cell change method shown in FIG. 1 to FIG. 3.
  • the cell change apparatus 4 may include: a first execution module 41 and a second execution module 42.
  • the first execution module 41 is adapted to perform a listen-before-talk operation based on unlicensed spectrum resources; if the execution of the listen-after-talk operation fails continuously, the second execution module 42 is adapted to perform cell selection or cell reselection.
  • the cell change apparatus 4 may further include: a measurement module 43, adapted to measure a cell before performing cell selection or cell reselection, the cell including one or more of the following: co-frequency cells , Different frequency cells, different system cells.
  • the cell changing apparatus 4 may include: a determining module 44 adapted to determine a cell whose value of the received signal strength indication is lower than a second preset threshold as a candidate target cell when performing cell selection or cell reselection.
  • the measurement module 43 may include: a determination submodule 431 adapted to determine whether to start or stop measurement on the cell based on the received signal strength indication of the cell; a first measurement submodule 432. It is suitable for measuring a cell where measurement is started or not stopped.
  • the determination sub-module 431 is further adapted to perform the following operation: if the value of the received signal strength indication of the cell exceeds the first preset threshold, terminate or not start the measurement of the cell.
  • the measurement module 43 may include: a second measurement sub-module 433 adapted to preferentially measure cells in different frequencies and cells in different systems.
  • the measurement module 43 may include: a receiving sub-module 434 adapted to receive a measurement type configured by the network, the measurement type including one or more of the following: co-frequency measurement, inter-frequency measurement 3. Different system measurement; the third measurement sub-module 435 is adapted to use the measurement type to measure the cell after a continuous failure event after listening first and then talking.
  • the second execution module 42 is also adapted to perform the cell reselection; if the RRC establishment is completed When the message or the RRC recovery complete message appears, the operation fails after listening first and then saying that the second execution module 42 is also adapted to perform the cell selection.
  • the cell changing apparatus 4 may further include: a sending module 45, after performing the cell selection or cell reselection, if the current cell accesses the target cell, the sending module 45 is adapted to send an RRC establishment request Message or RRC recovery request message or RRC recovery request message 1 to the network to complete the RRC connection; wherein, the sent RRC establishment request message or RRC recovery request message or RRC recovery request message 1 includes: an indicator to indicate that LBT has occurred Continuously failed events.
  • the cell change apparatus 4 may further include: a first setting module 46, which is adapted to set an access category of access control.
  • the cell changing device 4 may further include: a second setting module (not shown in the figure). If, during the RRC connection restoration process initiated by the RNA update, the operation fails after listening first and then saying, the first The second setting module is suitable for setting the value of pending RNA update to true.
  • the cell changing device 4 may further include: a third execution module (not shown). After performing cell selection or cell reselection, if access is made to the target cell from the current cell based on cell selection, then The third execution module is adapted to perform an RRC connection restoration process based on the target cell to perform RNA update.
  • a third execution module (not shown). After performing cell selection or cell reselection, if access is made to the target cell from the current cell based on cell selection, then The third execution module is adapted to perform an RRC connection restoration process based on the target cell to perform RNA update.
  • the third execution module is further adapted to send an RRC recovery request message or an RRC recovery request 1 message.
  • the RRC recovery request message or RRC recovery request message 1 includes: indication information, and the indication information It is used to indicate that the RNA update is a pending RNA update.
  • an embodiment of the present invention also discloses a storage medium on which computer instructions are stored, and when the computer instructions run, the method for determining the downlink control channel resource described in the embodiments shown in FIGS. 1 to 3 above is executed.
  • the storage medium may include a computer-readable storage medium such as a non-volatile memory or a non-transitory memory.
  • the computer-readable storage medium may include ROM, RAM, magnetic disk, or optical disk.
  • an embodiment of the present invention also discloses a terminal, including a memory and a processor, the memory stores computer instructions that can run on the processor, and the processor executes the above diagram when the computer instructions are executed Technical solutions of the cell change method described in the embodiments shown in FIGS. 1 to 3.
  • the terminal is NR UE.
  • the processor may be a central processing unit (Central Processing Unit, CPU for short), and the processor may also be other general-purpose processors or digital signal processors (Digital Signal Processor, DSP for short). , Application Specific Integrated Circuit (Application Specific Integrated Circuit, ASIC for short), ready-made programmable gate array (Field Programmable Gate Array, FPGA for short) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc.
  • the general-purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
  • the memory in the embodiments of the present invention may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory may be a read-only memory (Read-Only Memory, ROM for short), a programmable read-only memory (Programmable ROM, PROM for short), and an erasable programmable read-only memory (Erasable PROM, EPROM for short).
  • Electrically erasable programmable read-only memory Electrically erasable programmable read-only memory (Electrically EPROM, EEPROM for short) or flash memory.
  • the volatile memory may be a random access memory (Random Access Memory, RAM for short), which is used as an external cache.
  • Random Access Memory Random Access Memory
  • static random access memory Static RAM, SRAM for short
  • dynamic random access memory Dynamic Random Access Memory
  • DRAM synchronous dynamic random access memory
  • DDR SDRAM double data rate synchronous dynamic random access memory
  • ESDRAM enhanced synchronous dynamic random access memory
  • SLDRAM Synchronous Connection to DRAM
  • DDR-RAM Direct Memory Bus Random Access Memory
  • the above embodiments can be implemented in whole or in part by software, hardware, firmware, or any other combination.
  • the above-described embodiments may be fully or partially implemented in the form of computer program products.
  • the computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer programs are loaded or executed on a computer, all or part of the processes or functions according to the embodiments of the present invention are generated.
  • the computer may be a general-purpose computer, a dedicated computer, a computer network, or other programmable devices.
  • the computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be from a website site, computer, server or data center Transmission to another website, computer, server or data center via wired (eg infrared, wireless, microwave, etc.).
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or data center that contains one or more collections of available media.
  • the usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium.
  • the semiconductor medium may be a solid state drive.
  • the size of the sequence numbers of the above processes does not mean that the execution order is sequential, and the execution order of each process should be determined by its function and inherent logic, and should not correspond to the embodiments of the present invention.
  • the implementation process constitutes no limitation.
  • the disclosed method, apparatus, and system may be implemented in other ways.
  • the device embodiments described above are only schematic.
  • 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 may be combined or 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 may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may be physically included separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware, or in the form of hardware plus software functional units.
  • the above integrated unit implemented in the form of a software functional unit may be stored in a computer-readable storage medium.
  • the above software functional unit is stored in a storage medium, and includes several instructions to enable a computer device (which may be a personal computer, a server, or a network device, etc.) to perform some steps of the methods described in the embodiments of the present invention.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM for short), random access memory (Random Access Memory, RAM for short), magnetic disk or optical disc, etc., which can store program codes Medium.

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Abstract

一种小区变更方法及装置、存储介质、终端，所述小区变更方法包括：基于免授权频谱资源执行先听后说操作；如果执行先听后说操作连续失败，则执行小区选择或小区重选。通过本发明的技术方案，可以在免授权频谱LBT连续失败情况下，提高RRC连接成功率，有效解决RRC连接失败问题。

Description

一种小区变更方法及装置、存储介质、终端
本申请要求于2018年12月28日提交中国专利局、申请号为201811622444.3、发明名称为“一种小区变更方法及装置、存储介质、终端”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及无线通信技术领域，具体地涉及一种小区变更方法及装置、存储介质、终端。
背景技术
第三代合作伙伴项目(the 3rd Generation Partnership Project，简称3GPP)标准组织将研究在非授权频谱上如何部署第五代移动通信(The Fifth-Generation mobile communications，简称5G)新无线(New Radio，简称NR)系统，从而达到公平、有效地利用非授权频谱，提高NR系统的数据传输速率的目的。NR系统使用非授权频谱技术也称为新无线接入免授权(New RAT Unlicense，简称NR-U)技术。
对于非授权频谱的使用，不同国家有着不同管制方式。例如，需通过先听后说操作(Listen-Before-Talk，简称LBT)的方式使用非授权频谱。LBT过程如下：在收发双方通信之前，需要进行干净信道评估(Clear Channel Assessment，简称CCA)。如果评估结果为信道空闲，那么立即发送数据；否则直到下一个固定帧周期结束前，均不能传输数据。所述固定帧是由信道占用时间(Channel Occupancy Time，简称COT)和空闲周期(Idle period)组成的，其中信道占用时间为1毫秒(millisecond，简称ms)到10ms，最小空闲周期为信道占用时间的 5％。
在5G NR通信系统中，用户设备(User Equipment，简称UE)状态包括无线资源控制空闲(Radio Resource Control-Idle，简称RRC-IDLE)态、RRC非活动(RRC-Inactive)态和RRC连接(RRC-Connected)态。UE从RRC空闲态进入RRC连接态，需要进行RRC连接建立(RRC connection establishment)，从RRC非活动态进入RRC连接态需要进行RRC连接继续过程(RRC connection resume)过程。但是在，在非授权频谱小区中，进行RRC连接建立或RRC连接继续过程均需要进行LBT。在LBT成功获得信道资源使用权后，才可以发送相关RRC消息以实现RRC连接建立或RRC连接继续。如果UE执行LBT连续失败(例如，LBT失败4次以上)，则UE无法进入RRC连接态，将导致后续的数据或信令的发送失败。
发明内容
本发明解决的技术问题是在免授权频谱LBT连续失败情况下，如何提高RRC连接成功率，以有效解决RRC连接失败问题。
为解决上述技术问题，本发明实施例提供一种小区变更方法，包括：基于免授权频谱资源执行先听后说操作；如果执行先听后说操作连续失败，则执行小区选择或小区重选。
可选的，在执行小区选择或小区重选之前，所述小区变更方法还包括：对小区进行测量，所述小区包括以下一项或多项：同频小区、异频小区、异系统小区。
可选的，所述对小区进行测量包括：基于所述小区的接收信号强度指示，确定是否对所述小区开启测量或停止测量；对开启测量或非停止测量的小区进行测量。
可选的，所述基于所述小区的接收信号强度指示，确定是否对所述小区开启测量或停止测量包括：如果所述小区的接收信号强度指示 的数值超过第一预设门限，则终止或不开启对所述小区的测量。
可选的，所述小区变更方法还包括：在执行小区选择或小区重选时，将接收信号强度指示的数值低于第二预设门限的小区确定为候选目标小区。
可选的，所述对小区进行测量包括：优先对异频小区、异系统小区进行测量。
可选的，所述对小区进行测量包括：接收网络配置的测量类型，所述测量类型包括以下一项或多项：同频测量、异频测量、异系统测量；在先听后说操作连续失败事件发生后采用所述测量类型，对所述小区进行测量。
可选的，所述如果执行先听后说操作连续失败，则执行小区选择或小区重选包括：如果发送RRC建立请求消息或RRC恢复请求消息或RRC恢复请求消息1时，出现先听后说操作连续失败，则执行所述小区重选；如果发送RRC建立完成消息或RRC恢复完成消息时，出现先听后说操作连续失败，则执行所述小区选择。
可选的，在执行所述小区选择或小区重选之后，所述小区变更方法还包括：如果从当前小区接入至目标小区，那么发送RRC建立请求消息或RRC恢复请求消息或RRC恢复请求消息1至网络，以完成RRC连接；其中，发送的RRC建立请求消息或RRC恢复请求消息或RRC恢复请求消息1包括：指示符，用于指示发生了LBT连续失败的事件。
可选的，所述小区变更方法还包括：设置接入控制的接入类别。
可选的，在执行小区选择或小区重选之前，所述小区变更方法还包括：如果在RNA更新发起的RRC连接恢复过程中，先听后说操作连续失败，则设置挂起RNA更新的值为真。
可选的，在执行小区选择或小区重选之后，所述小区变更方法，还包括：如果基于小区选择从当前小区接入至目标小区，那么基于所 述目标小区，执行RRC连接恢复过程，以进行RNA更新。
可选的，所述执行RRC连接恢复过程，以进行RNA更新包括：发送RRC恢复请求消息或RRC恢复请求1消息，所述RRC恢复请求消息或RRC恢复请求消息1包括：指示信息，所述指示信息用于指示所述RNA更新为挂起RNA更新。
为解决上述技术问题，本发明实施例还提供一种小区变更装置，包括：第一执行模块，适于基于免授权频谱执行先听后说操作；第二执行模块，如果执行先听后说操作连续失败，则所述第二执行模块适于执行小区选择或小区重选。
为解决上述技术问题，本发明实施例还提供一种存储介质，其上存储有计算机指令，所述计算机指令运行时执行上述小区变更方法的步骤。
为解决上述技术问题，本发明实施例还提供一种终端，包括存储器和处理器，所述存储器上存储有可在所述处理器上运行的计算机指令，所述处理器运行所述计算机指令时执行上述小区变更方法的步骤。
与现有技术相比，本发明实施例的技术方案具有以下有益效果：
本发明实施例提供一种小区变更方法，包括：基于免授权频谱执行先听后说操作；如果执行先听后说操作连续失败，则执行小区选择或小区重选。在免授权频谱LBT连续失败情况下，通过本发明实施例提供的技术方案，可以采用小区选择或小区重选获得合适的小区，从而重新执行LBT。进一步，可以在获得合适的小区之后进行RRC连接，为RRC连接提供可行方案，有利于有效解决RRC连接失败问题，提高RRC连接成功率和网络性能。
进一步，在执行小区选择或小区重选之前，所述方法还包括：对小区进行测量，所述小区包括以下一项或多项：同频小区、异频小区、异系统小区。通过本发明实施例提供的技术方案，利用小区测量可以 初步判断各个小区的干扰情况，从而为选取到合适的小区提供可能，有利于有效避免出现后续LBT失败情况。
进一步，在执行小区选择或小区重选之前，所述方法还包括：如果在RNA更新发起的RRC连接恢复过程中，先听后说操作连续失败，则设置挂起RNA更新的值为真。通过本发明实施例提供的技术方案，如果在RNA更新发起的RRC连接恢复过程期间出现LBT连续失败，那么可以进行挂起RNA更新程序，在满足条件(例如，定时器T302或定时器T390超时或停止)时再次发起RRC连接恢复过程，从而可以完成RNA更新程序，有利于克服LBT连续失败对RNA更新的影响。
进一步，所述执行RRC连接恢复过程，以进行RNA更新包括：发送RRC恢复请求消息或RRC恢复请求1消息，所述RRC恢复请求消息或RRC恢复请求消息1包括：指示信息，所述指示信息用于指示所述RNA更新为挂起RNA更新。通过本发明实施例提供的技术方案，可以在RRC恢复请求消息或RRC恢复请求1消息中增加指示所述RNA更新为挂起RNA更新的指示信息，使得网络侧可以更好地进行无线资源管理，减少UE LBT连续失败事件对RRC连接管理造成的不利影响。
附图说明
图1是本发明实施例的一种小区变更方法的流程示意图；
图2是本发明实施例的一种典型场景的信令交互示意图；
图3是本发明实施例的又一种典型场景的信令交互示意图；
图4是本发明实施例的一种小区变更装置的结构示意图。
具体实施方式
如背景技术所言，现有技术只是重复进行LBT，如果LBT连续失败，则在小区的负荷或干扰比较大的场景下，可能导致UE一直进行RRC连接建立或RRC连接继续过程，并且可能一直失败。
所述LBT连续失败可以是指终端执行LBT操作，LBT连续失败的次数超过预设次数，或者预设时间段内LBT连续失败的次数超过预设门限。其中，LBT连续失败的预设次数、预设时间段以及预设门限，可以是网络侧配置的，通过专用消息(例如，RRC信令)或公共消息(System Information，简称SI，又称系统信息)通知终端。
例如，网络侧配置LBT连续失败的预设次数可以为8次。在此条件下，如果LBT连续失败8次，则表示终端发生LBT连续失败的事件。又例如，网络侧配置LBT连续失败的预设次数可以为8次，时间门限为10s。在此条件下，如果在10s内LBT连续失败8次，则表示终端发生LBT连续失败的事件。
本发明实施例提供一种小区变更方法，包括：基于免授权频谱执行先听后说操作；如果执行先听后说操作连续失败，则执行小区选择或小区重选。在免授权频谱LBT连续失败情况下，通过本发明实施例提供的技术方案，可以采用小区选择或小区重选获得合适的小区，从而重新执行LBT。进一步，可以在获得合适的小区之后进行RRC连接，为RRC连接提供可行方案，有利于有效解决RRC连接失败问题，提高RRC连接成功率和网络性能。
为使本发明的上述目的、特征和有益效果能够更为明显易懂，下面结合附图对本发明的具体实施例做详细的说明。
本方明实施例可适用于5G NR通信系统，还可适用于4G、3G通信系统，还可适用于后续演进的各种通信系统，例如6G、7G等。本方明实施例也适用于不同的网络架构，包括但不限于中继网络架构、双链接架构、车联网(Vehicle-to-Everything)通信架构。
本发明实施例中所述的网络侧可以包括5G新型核心网(new core 或者5G NewCore，简称5G-CN)、或者下一代核心网(Next Generation Core，简称NGC)等。5G-CN独立于现有技术的核心网，例如演进型分组核心网(Evolved Packet Core，简称EPC)而设置。
本发明实施例中的网络侧可以指无线接入网的基站(Base Station，简称BS)，还可以包含核心网中的网元。所述基站也可称为基站设备，是一种部署在无线接入网用以提供无线通信功能的装置。例如，在2G网络中提供基站功能的设备包括：基地无线收发站(Base Transceiver Station，简称BTS)和基站控制器(Base Station Controller，简称BSC)。3G网络中提供基站功能的设备包括：NodeB和无线网络控制器(Radio Network Controller，简称RNC)。4G网络中提供基站功能的设备包括：演进的(Evolved NodeB，简称eNB)。在无线局域网络(Wireless Local Area Network，简称WLAN)中，提供基站功能的设备为接入点(Access Point，简称AP)。5GNR提供基站功能的设备包括：继续演进的NodeB(gNB)，以及未来新的通信系统中提供基站功能的设备等。
本发明实施例中的终端可以指各种形式的UE、接入终端、用户单元、用户站、移动站、移动台(Mobile Station，简称MS)、远方站、远程终端、移动设备、用户终端、终端设备(terminalequipment)、无线通信设备、用户代理或用户装置。终端设备还可以是蜂窝电话、无绳电话、会话启动协议(Session Initiation Protocol，简称SIP)电话、无线本地环路(Wireless Local Loop，简称WLL)站、个人数字处理(Personal Digital Assistant，简称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，简称PLMN)中的终端设备等，本发明实施例对此并不限定。
应理解，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“/”，表示前后关联对象是一种“或”的关系。
本发明实施例中出现的“多个”是指两个或两个以上。
本发明实施例中出现的第一、第二等描述，仅作示意与区分描述对象之用，没有次序之分，也不表示本发明实施例中对设备个数的特别限定，不能构成对本发明实施例的任何限制。
本发明实施例中出现的“连接”是指直接连接或者间接连接等各种连接方式，以实现设备间的通信，本发明实施例对此不做任何限定。
本发明实施例中出现的“网络”与“系统”表达的是同一概念，通信系统即为通信网络。
图1是本发明实施例的一种小区变更方法的流程示意图，所述小区变更方法可以应用于终端一侧，例如，由NR UE执行。具体而言，所述小区变更方法可以包括以下步骤：
步骤S101，基于免授权频谱资源执行先听后说操作；
步骤S102，如果执行先听后说操作连续失败，则执行小区选择或小区重选。
更具体而言，终端部署在免授权频谱资源。在步骤S101中，终端可以在免授权频谱资源中执行LBT，以在RRC空闲态进入RRC连接态，或在RRC非活动态进入RRC连接态。UE在当前小区执行LBT首次失败之后，可以再次执行LBT。
在步骤S102中，如果终端执行LBT连续失败，那么终端可以尝试选择其他小区再次进行LBT，以从RRC空闲态或RRC非活动态进入RRC连接态。其中，所述LBT连续失败指的是执行2次以上LBT，且每次的LBT过程均失败。
具体而言，如果LBT连续失败，则终端可以进行小区选择或小区重选，以实现RRC连接。
作为一个非限制性的例子，在进行小区选择或小区重选之前，终端可以对小区进行测量，以尽量选取干扰较小的目标小区，有利于后续LBT成功竞争到频谱资源。
对小区进行测量，可以包括同频小区测量、异频小区测量、异系统小区测量中的一种或多种。由于同频小区的干扰可能也很大，为了提高后续LBT竞争成功概率，因而终端可以优先选择异频小区和/或异系统小区测量。其中，所述异系统指的是与NR-U系统不同的其它无线通信系统。
进一步，在对小区进行测量之前，终端可以从网络侧接收其配置的测量配置信息。所述测量配置信息可以指示终端在LBT连续失败事件发生后，启动的测量类型：同频测量、异频测量、异系统测量中的一项或多项。在具体实施中，网络侧可通过专用RRC信令或系统信息通知终端所述测量配置信息。终端可以根据所述测量配置信息进行小区重选或小区选择的测量操作。
在具体实施中，终端可以根据不同频率或不同系统的接收信号强度指示(Received Signal Strength Indicator，简称RSSI)决定是否终止或不开启某些测量。进一步，在执行小区选择或小区重选时，终端可以将RSSI值低于第二预设门限的小区确定为候选目标小区。
例如，若异频小区RSSI值超过第一预设门限，则终端可以终止或不开启对所述异频小区的测量。又例如，若异系统小区RSSI值超过所述第一预设门限，则终端也可以终止或不开启对所述异系统小区的测量。再例如，若异频小区RSSI值低于第二预设门限，则终端可以将所述异频小区确定为候选目标小区，并依据小区选择规则或小区重选规则从候选目标小区中选择一个小区作为目标小区，终端从当前小区离开，驻留到所述目标小区。例如，所述小区选择规则可以是选择RSRP高于某一门限且参考信号接收质量(Reference Signal Received Quality，简称RSRQ)高于某一门限的该频率上信号质量最强的小区。
作为一个变化例，如果终端处于RRC非活动态，且为进行无线接入网通知区域(Radio access network-based Notification Area简称RNA)更新，那么在小区选择或小区重选之前，终端可以将变量挂起RNA更新(pendingRnaUpdate)的值设置为真(TRUE)。所述变量pendingRnaUpdate可以指示是否存在挂起(pending)的RNA更新程序。
下面以具体实施例进行详细阐述。
具体实施例一：
在LBT连续失败后，RRC空闲态终端进行小区重选或小区选择。
具体而言，RRC空闲态终端发起RRC连接建立过程，可以首先发送RRC建立请求(RRCSetupRequest)消息。如果发送RRCSetupRequest消息时，出现LBT连续失败，那么终端可以执行小区重选，以选取目标小区。进一步，如果终端发送RRC建立完成(RRCSetupComplete)消息时，出现LBT连续失败，那么终端也可以执行小区选择，以重新选取目标小区。
在具体实施中，为发送RRCSetupRequest消息，终端需要进行LBT操作，如果发生了LBT连续失败的事件，则终端可以对同频小区、异频小区、异系统小区中的至少一项进行测量。例如，不考虑服务小区的信号质量的限制，直接对同频小区、异频小区、异系统小区进行测量，以进行小区重选。
进一步，处于RRC空闲态的终端在启动用于小区重选的测量时，可以优先选择异频小区、异系统小区测量。因为如果发生LBT连续失败事件，意味着同频邻区的干扰可能也很大，因而，为了减少后续LBT失败概率，终端可以优先选择对异频小区、异系统小区进行测量。
进一步，处于RRC空闲态的终端可以根据不同频率或系统的RSSI决定终止对某一小区或某些小区进行测量，例如，若异频段的RSSI值超过预设门限x，则终端可以终止对异频小区的测量。或者， 处于RRC空闲态的终端可以根据不同频率或系统的RSSI决定不开启对某个小区或某些小区的测量，例如，若异频段的RSSI值超过预设门限x，则终端可以终止或不开启对某一异频小区或某些异频小区的测量。所述异频段可以是免授权的频谱资源。网络侧可通过专用RRC信令或系统信息，预先通知终端预设门限x。
进一步，网络侧可预先为工作在免授权频谱资源上的RRC空闲态终端配置测量类型，以使得终端可以在LBT连续失败事件发生后，启动同频、异频和/或异系统测量。网络侧可通过专用RRC信令或系统信息，预先通知终端在LBT连续失败事件发生后启动的测量类型。终端在LBT连续失败事件发生后启动对应测量类型的测量，所述测量用于小区重选。
进一步，在RRC connection establishment过程中，如果所述RRC空闲态终端为发送RRCSetupComplete消息而执行LBT，且LBT连续失败，则终端可以进行小区选择，以进行RRC连接重建过程。优选地，所述终端可以优先选择异频小区或异系统小区以尽量避免LBT失败。优选的，所述终端可以选择RSSI值低于预设门限y的小区。所述预设门限y可用于免授权频谱的频段。网络侧可通过专用RRC信令或系统信息，预先通知终端预设门限y。
具体实施例二：
在LBT连续失败后，RRC非活动态终端进行小区重选或小区选择。
具体而言，如果终端发送RRC连接恢复消息(RRCResumeRequest或RRCResumeRequest1)消息时，出现LBT连续失败，那么终端可以执行小区重选，以选取目标小区。如果终端发送RRC恢复完成(RRCResumeComplete)消息时，出现LBT连续失败，那么终端可以执行小区选择，以选取目标小区。
在具体实施中，RRC非活动态终端发起RRC连接恢复过程时， 为发送RRCResumeRequest消息或RRCResumeRequest1消息，需要进行LBT操作。如果LBT连续失败，则终端可以启动同频、异频、异系统中的至少一项小区测量。即不考虑服务小区的信号质量的限制，LBT连续失败的事件触发所述终端进行小区重选。在这种情况下，终端状态仍为RRC非活动态。
进一步，终端在启动小区重选的测量时，可优先对异频、异系统进行测量，这主要是考虑到同频邻区的干扰可能也很大，出现LBT失败事件的概率较高。
进一步，终端可以根据不同频率或系统的RSSI决定终止或不开启某些测量，例如，若异频段的RSSI值超过某一预设门限x，则终端可以终止或不开启对该异频段的测量。所述异频段可以是免授权的频谱资源。网络侧可通过专用RRC信令或系统信息，预先通知终端预设门限x。
进一步，网络侧可以通过专用RRC信令或系统信息，预先为终端配置LBT连续失败的事件发生后终端能够启动的测量类型，例如同频小区、异频小区、异系统小区中的一项或多项。所述测量可以用于小区重选。
进一步，如果在RRC连接恢复过程中，发送RRCResumeComplete消息时发生LBT连续失败事件，则终端可以进行小区选择，以完成RRC链接重建。此时，终端状态为RRC连接态。优选地，所述终端可以优先选择异频小区或异系统小区进行RRC连接重建，以尽量避免LBT失败。优选的，所述终端可以选择RSSI值低于预设门限y的小区。所述预设门限y可用于免授权频谱的频段。网络侧可通过专用RRC信令或系统信息，预先通知终端预设门限y。
本领域技术人员理解，在LBT连续失败后，通过RRC空闲态、RRC非活动态的终端触发小区重选或小区选择，可以使终端选择合适的小区进行RRC连接建立，有利于提高终端后续的建立RRC连接的成功概率，提升网络性能。
具体实施例三：
在终端通过小区重选或小区选择从当前小区进入目标小区之后，可以选择驻留到目标小区。
终端可以在目标小区发起RRC连接建立或RRC连接恢复过程。在发送的RRCSetupRequest消息、RRCResumeRequest消息或RRCResumeRequest1消息中，终端可以添加指示符，用于指示发生了LBT连续失败的事件。所述指示符可以为原因值，表示“发生了LBT连续失败的事件”，所述“发生了LBT连续失败的事件”的原因值指示终端在所述目标小区之前驻留的小区中，发起RRC连接建立或RRC连接恢复过程时，发生了LBT连续失败的事件，从而导致终端进行小区重选或小区选择，并进入所述目标小区。
网络侧接收到RRCSetupRequest消息、RRCResumeRequest消息、或RRCResumeRequest1消息后，可以根据其中的原因值“发生了LBT连续失败的事件”，在无线资源管理中对所述终端进行特殊处理。例如，放宽接入小区条件，以使得终端可以接入所述目标小区，减少对包含所述原因值“发生了LBT连续失败事件”的RRC连接请求执行拒绝操作，等等。
进一步，终端在发起RRC连接建立或RRC连接恢复过程时，如果原因是“发生了LBT连续失败的事件”，那么终端可以设置接入控制(access control)的接入类别(Access Category)，使得在终端进行接入控制时，能够以很大概率接入成功。
进一步，终端可设置接入类别为类别2或类别0，使其可以通过接入控制。
通过终端在RRCSetupRequest消息、RRCResumeRequest消息和/或RRCResumeRequest1消息中增加指示“发生了LBT连续失败的事件”的指示符，使得网络侧得知终端发生的事件，进而可以根据终端情况更好地进行无线资源的管理，减少终端因LBT连续失败事件对 RRC连接管理产生的不利影响。
具体实施例四：
处于RRC非活动态的终端因RNA更新发起RRC连接恢复过程。
如果终端在发送RRCResumeRequest消息或RRCResumeRequest1消息时，LBT连续失败，则终端可以将变量pendingRnaUpdate的值设置为真，以指示存在挂起(pending)的RNA更新程序。
在具体实施中，如果所述变量pendingRnaUpdate的值为真，表示存在挂起RNA更新程序，那么终端可以在满足一定条件时，再次发起RRC连接恢复过程。所述一定条件可以为延迟一段时间，或者接入控制中对RNA更新的接入类别的阻拦变轻(例如，定时器T302超时或停止，定时器T390超时或停止)，或者其它条件，在此不做约束。通过在LBT连续失败后，执行挂起RNA更新，并在满足条件时重新发起RRC连接恢复过程，可以完成RNA更新，克服LBT连续失败对RNA更新产生的不利影响。
进一步，若所述变量pendingRnaUpdate的值为真，且处于RRC非活动态的终端通过进行小区重选驻留到目标小区，则终端可以在所述目标小区发起RRC连接恢复过程。
进一步，终端可以在所述目标小区发起RRC连接恢复，进行RNA更新。具体而言，终端可以在RRCResumeRequest消息或RRCResumeRequest1消息中携带指示信息，所述指示信息可以用于指示发起的RNA更新为挂起RNA更新。
下面结合典型的应用场景对采用本发明实施例的终端(例如，用户设备)和网络(例如，NR基站)之间的信令交互作进一步阐述。
参考图2，在一个典型的应用场景中，用户设备1接入网络2中的小区1之后，小区1所属的基站(图中以小区1表示)可以首先执行操作s1，即提前向用户设备1发送测量配置信息。所述测量配置信 息可以用于指示终端在LBT连续失败事件发生后，用户设备1能够启动的测量类型。
其次，用户设备1执行操作s2，即进入RRC空闲态或RRC非活动态；或者UE处于RRC空闲态或RRC非活动态，通过系统信息获得网络2发送的测量配置信息；
之后，用户设备1欲传输数据，执行操作s3，即执行LBT，且LBT连续失败；
进一步，用户设备1执行操作s4，即基于所述测量配置信息进行小区测量；
进一步，用户设备1执行操作s5，即用户设备1进行小区重选或小区选择，从小区1离开，驻留到小区2；
进一步，用户设备执行操作s6，即用户设备1在小区2发送RRCSetupRequest消息、RRCResumeRequest消息、或RRCResumeRequest1消息，其中添加用于指示发生了LBT连续失败的事件的指示符；
进一步，用户设备执行操作s7，即用户设备1设置接入类别，以增大后续进行LBT竞争成功概率；
进一步，小区2所属的基站(图中以小区2表示)执行操作s8，即发送RRC connection establishment、RRC connection re-establishment、RRC connection resume过程中的消息，包含RRCsetup消息、RRCReestablishment消息、RRCResume消息、RRCRelease消息、RRCRejec消息等其中之一项的消息；
进一步，用户设备1执行操作s9，即用户设备1发送RRCSetupComplete消息或RRCReestablishmentComplete消息或RRCResumeComplete消息。至此，用户设备1从RRC空闲态或RRC非活动态进入RRC连接态。
在又一个典型的应用场景中，参考图3，用户设备1接入网络2中的小区1之后，进入RRC非活动态；之后，如果用户设备1需执行RRC连接恢复过程，以进行RNA更新，则用户设备1可以执行操作s1，即执行LBT以发送RRCResumeRequest消息或RRCResumeRequest1消息；
进一步，如果LBT连续失败，则用户设备1可以执行操作s2，即将变量pendingRnaUpdate的值设置为真；
进一步，用户设备1可以执行操作s3，即在满足一定条件时，用户设备1再次在小区1发起RRC连接恢复过程，所述一定条件可以为延迟一定时间或者接入控制中对RNA更新的接入类型的阻拦变轻(例如定时器T302超时或停止，定时器T390超时或停止)或其它条件；
进一步，用户设备1可以执行操作s4，即进行小区选择或小区重选，从小区1离开，驻留到小区2；
进一步，用户设备1可以执行操作s5，即用户设备1在小区2发送RRCResumeRequest消息或RRCResumeRequest1消息，且所述RRCResumeRequest消息或RRCResumeRequest1消息中携带指示信息，所述指示信息可以用于指示发起的RNA更新为挂起RNA更新。
进一步，小区2接收到用户设备1发出的RRC消息后，执行操作s6，即发送RRCResume消息；
进一步，用户设备1执行操作s7，即用户设备1发送RRCResumeComplete消息。至此，用户设备1可以从RRC非活动态进入RRC连接态。
由上，通过本发明实施例提供的技术方案，部署在免授权频谱资源的终端LBT连续失败之后，所述终端可以通过进行小区选择或小区重选驻留到其他小区中。进一步，所述终端可以重新执行RRC连接建立过程或RRC连接恢复过程，从RRC空闲态或RRC非活动态 进入RRC连接态。
图4是本发明实施例的一种小区变更装置的结构示意图。所述小区变更装置4可以由终端执行，以实施图1至图3所示的小区变更方法技术方案。
具体地，所述小区变更装置4可以包括：第一执行模块41和第二执行模块42。所述第一执行模块41适于基于免授权频谱资源执行先听后说操作；如果执行先听后说操作连续失败，则所述第二执行模块42适于执行小区选择或小区重选。
在具体实施中，所述小区变更装置4还可以包括：测量模块43，适于在执行小区选择或小区重选之前，对小区进行测量，所述小区包括以下一项或多项：同频小区、异频小区、异系统小区。
进一步，所述小区变更装置4可以包括：确定模块44，适于在执行小区选择或小区重选时，将接收信号强度指示的数值低于第二预设门限的小区确定为候选目标小区。
作为一个非限制性的例子，所述测量模块43可以包括：确定子模块431，适于基于所述小区的接收信号强度指示，确定是否对所述小区开启测量或停止测量；第一测量子模块432，适于对开启测量或非停止测量的小区进行测量。
在具体实施中，所述确定子模块431还适于执行如下操作：如果所述小区的接收信号强度指示的数值超过第一预设门限，则终止或不开启对所述小区的测量。
作为又一个非限制性的例子，所述测量模块43可以包括：第二测量子模块433，适于优先对异频小区、异系统小区进行测量。
作为又一个非限制性的例子，所述测量模块43可以包括：接收子模块434，适于接收网络配置的测量类型，所述测量类型包括以下一项或多项：同频测量、异频测量、异系统测量；第三测量子模块435，适于在先听后说操作连续失败事件发生后采用所述测量类型， 对所述小区进行测量。
在具体实施中，如果发送RRC建立请求消息或RRC连接恢复消息时，出现先听后说操作连续失败，则所述第二执行模块42还适于执行所述小区重选；如果发送RRC建立完成消息或RRC恢复完成消息时，出现先听后说操作连续失败，则所述第二执行模块42还适于执行所述小区选择。
进一步，所述小区变更装置4还可以包括：发送模块45，在执行所述小区选择或小区重选之后，如果从当前小区接入至目标小区，那么所述发送模块45适于发送RRC建立请求消息或RRC恢复请求消息或RRC恢复请求消息1至网络，以完成RRC连接；其中，发送的RRC建立请求消息或RRC恢复请求消息或RRC恢复请求消息1包括：指示符，用于指示发生了LBT连续失败的事件。优选地，所述小区变更装置4还可以包括：第一设置模块46，适于设置接入控制的接入类别。
作为一个变化例，所述小区变更装置4还可以包括：第二设置模块(图未示出)，如果在RNA更新发起的RRC连接恢复过程中，先听后说操作连续失败，则所述第二设置模块适于设置挂起RNA更新的值为真。
在具体实施中，所述小区变更装置4还可以包括：第三执行模块(图未示)，在执行小区选择或小区重选之后，如果基于小区选择从当前小区接入至目标小区，那么所述第三执行模块适于基于所述目标小区，执行RRC连接恢复过程，以进行RNA更新。
作为一个非限制性实施例，所述第三执行模块还适于发送RRC恢复请求消息或RRC恢复请求1消息，所述RRC恢复请求消息或RRC恢复请求消息1包括：指示信息，所述指示信息用于指示所述RNA更新为挂起RNA更新。
关于图4所示的小区变更装置4的工作原理、工作方式的更多内 容，可以参照上述图1至图3中的相关描述，这里不再赘述。
进一步地，本发明实施例还公开一种存储介质，其上存储有计算机指令，所述计算机指令运行时执行上述图1至图3所示实施例中所述下行控制信道资源的确定方法技术方案。优选地，所述存储介质可以包括诸如非挥发性(non-volatile)存储器或者非瞬态(non-transitory)存储器等计算机可读存储介质。所述计算机可读存储介质可以包括ROM、RAM、磁盘或光盘等。
进一步地，本发明实施例还公开一种终端，包括存储器和处理器，所述存储器上存储有能够在所述处理器上运行的计算机指令，所述处理器运行所述计算机指令时执行上述图1至图3所示实施例中所述的小区变更方法技术方案。优选地，所述终端为NR UE。
应理解，本发明实施例中，所述处理器可以为中央处理单元(Central Processing Unit，简称CPU)，该处理器还可以是其他通用处理器、数字信号处理器(Digital Signal Processor，简称DSP)、专用集成电路(Application Specific Integrated Circuit，简称ASIC)、现成可编程门阵列(Field Programmable Gate Array，简称FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等。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。
还应理解，本发明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，简称ROM)、可编程只读存储器(Programmable ROM，简称PROM)、可擦除可编程只读存储器(Erasable PROM，简称EPROM)、电可擦除可编程只读存储器(Electrically EPROM，简称EEPROM)或闪存。易失性存储器可以是随机存取存储器(Random Access Memory，简称RAM)，其用作外部高速缓存。通过示例性但不是限制性说明，许多形式的随机存取存储器(Random Access Memory，简称RAM)可用，例如静态随机存 取存储器(Static RAM，简称SRAM)、动态随机存取存储器(Dynamic Random Access Memory，简称DRAM)、同步动态随机存取存储器(Synchronous DRAM，简称SDRAM)、双倍数据速率同步动态随机存取存储器(Double Data Rate SDRAM，简称DDR SDRAM)、增强型同步动态随机存取存储器(Enhanced SDRAM，简称ESDRAM)、同步连接动态随机存取存储器(Synchronous connection to DRAM，简称SLDRAM)和直接内存总线随机存取存储器(Direct Rambus RAM，简称DR-RAM)。
上述实施例，可以全部或部分地通过软件、硬件、固件或其他任意组合来实现。当使用软件实现时，上述实施例可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令或计算机程序。在计算机上加载或执行所述计算机指令或计算机程序时，全部或部分地产生按照本发明实施例所述的流程或功能。所述计算机可以为通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集合的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质(例如，软盘、硬盘、磁带)、光介质(例如，DVD)、或者半导体介质。半导体介质可以是固态硬盘。
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，而不应对本发明实施例的实施过程构成任何限定。
在本申请所提供的几个实施例中，应该理解到，所揭露的方法、装置和系统，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，在本发明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包括，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用硬件加软件功能单元的形式实现。
上述以软件功能单元的形式实现的集成的单元，可以存储在一个计算机可读取存储介质中。上述软件功能单元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)执行本发明各个实施例所述方法的部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(Read-Only Memory，简称ROM)、随机存取存储器(Random Access Memory，简称RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
虽然本发明披露如上，但本发明并非限定于此。任何本领域技术人员，在不脱离本发明的精神和范围内，均可作各种更动与修改，因此本发明的保护范围应当以权利要求所限定的范围为准。

Claims (16)

  1. 一种小区变更方法，其特征在于，包括：
    基于免授权频谱资源执行先听后说操作；
    如果执行先听后说操作连续失败，则执行小区选择或小区重选。
  2. 根据权利要求1所述的小区变更方法，其特征在于，在执行小区选择或小区重选之前，还包括：
    对小区进行测量，所述小区包括以下一项或多项：同频小区、异频小区、异系统小区。
  3. 根据权利要求2所述的小区变更方法，其特征在于，所述对小区进行测量包括：
    基于所述小区的接收信号强度指示，确定是否对所述小区开启测量或停止测量；
    对开启测量或非停止测量的小区进行测量。
  4. 根据权利要求3所述的小区变更方法，其特征在于，所述基于所述小区的接收信号强度指示，确定是否对所述小区开启测量或停止测量包括：
    如果所述小区的接收信号强度指示的数值超过第一预设门限，则终止或不开启对所述小区的测量。
  5. 根据权利要求1所述的小区变更方法，其特征在于，在执行小区选择或小区重选时，还包括：
    将接收信号强度指示的数值低于第二预设门限的小区确定为候选目标小区。
  6. 根据权利要求2所述的小区变更方法，其特征在于，所述对小区进行测量包括：
    优先对异频小区、异系统小区进行测量。
  7. 根据权利要求2所述的小区变更方法，其特征在于，所述对小区进行测量包括：
    接收网络配置的测量类型，所述测量类型包括以下一项或多项：同频测量、异频测量、异系统测量；
    在先听后说操作连续失败事件发生后采用所述测量类型，对所述小区进行测量。
  8. 根据权利要求1所述的小区变更方法，其特征在于，所述如果执行先听后说操作连续失败，则执行小区选择或小区重选包括：
    如果发送RRC建立请求消息或RRC恢复请求消息或RRC恢复请求消息1时，出现先听后说操作连续失败，则执行所述小区重选；
    如果发送RRC建立完成消息或RRC恢复完成消息时，出现先听后说操作连续失败，则执行所述小区选择。
  9. 根据权利要求1所述的小区变更方法，其特征在于，在执行所述小区选择或小区重选之后，还包括：
    如果从当前小区接入至目标小区，那么发送RRC建立请求消息或RRC恢复请求消息或RRC恢复请求消息1至网络，以完成RRC连接；
    其中，发送的RRC建立请求消息或RRC恢复请求消息或RRC恢复请求消息1包括：指示符，用于指示发生了LBT连续失败的事件。
  10. 根据权利要求9所述的小区变更方法，其特征在于，还包括：
    设置接入控制的接入类别。
  11. 根据权利要求1所述的小区变更方法，其特征在于，在执行小区选择或小区重选之前，还包括：
    如果在RNA更新发起的RRC连接恢复过程中，先听后说操作连续失败，则设置挂起RNA更新的值为真。
  12. 根据权利要求11所述的小区变更方法，其特征在于，在执行小区选择或小区重选之后，还包括：
    如果基于小区选择从当前小区接入至目标小区，那么基于所述目标小区，执行RRC连接恢复过程，以进行RNA更新。
  13. 根据权利要求12所述的小区变更方法，其特征在于，所述执行RRC连接恢复过程，以进行RNA更新包括：
    发送RRC恢复请求消息或RRC恢复请求1消息，所述RRC恢复请求消息或RRC恢复请求消息1包括：指示信息，所述指示信息用于指示所述RNA更新为挂起RNA更新。
  14. 一种小区变更装置，其特征在于，包括：
    第一执行模块，适于基于免授权频谱执行先听后说操作；
    第二执行模块，如果执行先听后说操作连续失败，则所述第二执行模块适于执行小区选择或小区重选。
  15. 一种存储介质，其上存储有计算机指令，其特征在于，所述计算机指令运行时执行权利要求1至13任一项所述的小区变更方法的步骤。
  16. 一种终端，包括存储器和处理器，所述存储器上存储有可在所述处理器上运行的计算机指令，其特征在于，所述处理器运行所述计算机指令时执行权利要求1至13任一项所述的小区变更方法的步骤。
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