WO2019134642A1 - 无线链路恢复方法及终端 - Google Patents

无线链路恢复方法及终端 Download PDF

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Publication number
WO2019134642A1
WO2019134642A1 PCT/CN2019/070069 CN2019070069W WO2019134642A1 WO 2019134642 A1 WO2019134642 A1 WO 2019134642A1 CN 2019070069 W CN2019070069 W CN 2019070069W WO 2019134642 A1 WO2019134642 A1 WO 2019134642A1
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WO
WIPO (PCT)
Prior art keywords
radio link
configuration information
fails
handover
failure
Prior art date
Application number
PCT/CN2019/070069
Other languages
English (en)
French (fr)
Inventor
杨晓东
岳然
Original Assignee
维沃移动通信有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 维沃移动通信有限公司 filed Critical 维沃移动通信有限公司
Priority to US16/959,782 priority Critical patent/US11606831B2/en
Publication of WO2019134642A1 publication Critical patent/WO2019134642A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0096—Indication of changes in allocation
    • H04L5/0098—Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0092—Indication of how the channel is divided
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0033—Control or signalling for completing the hand-off for data sessions of end-to-end connection with transfer of context information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0079—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
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/19—Connection re-establishment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/02—Data link layer protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/08—Upper layer protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/15—Setup of multiple wireless link connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks

Definitions

  • the present disclosure relates to the field of communications technologies, and in particular, to a wireless link recovery method and terminal.
  • the fourth generation (4 th Generation, 4G) mobile communication system otherwise known as a long term evolution (Long Time Evolution, LTE) system, carrier aggregation is introduced (Carrier Aggregation, CA) technology.
  • the carrier aggregation technology is a terminal, or a user equipment (UE), and performs connection communication through multiple cells (Cells) and a network.
  • Cells One cell serves as the primary cell (PCell) of the terminal, and the other cell serves as the secondary cell (SCell) of the terminal.
  • the SCell has an active state and a deactivated state, and the PCell remains active until it is deactivated.
  • the initial state of the added one or more SCells is a deactivated state.
  • the target network device may send the configuration information of the SCell to the source network device by using a handover command (Handover Command), and the target network device forwards the message to the terminal through the RRC connection reconfiguration message, where all the initial states of the SCell are gone.
  • Activation status is a handover command (Handover Command)
  • the terminal maintains a deactivation timer (SCell Deactivation Timer) for each SCell.
  • SCell Deactivation Timer When the SCell enters an active state, the terminal starts a corresponding deactivation timer. If the deactivation timer expires, the terminal does not receive the corresponding SCell.
  • PDCCH physical downlink control channel
  • the terminal Upon the data or physical downlink control channel (PDCCH) message, the terminal automatically deactivates the SCell.
  • MAC Media Access Control
  • CE Control Element
  • the deactivated state to the activated state of the larger delay in order to reduce delay, in the fifth generation (5 th Generation, 5G) mobile communication system, otherwise known as a new air interface (New Radio, NR) system, the introduction of a New fast SCell activation state (SCell new state), which allows a channel quality indicator (Cell Reference Signal, CRS) to perform periodic channel quality indicator (Channel Quality Indicator, between activation and deactivation).
  • CRS Cell Reference Signal
  • the CQI reports and does not monitor the PDCCH, but is not limited to CQI reporting, and may also include a partial channel activation reference signal (SRS) or a physical downlink shared channel (Physical Downlink Share Channel, PDSCH).
  • SRS partial channel activation reference signal
  • PDSCH Physical Downlink Share Channel
  • LTE systems and 5G systems require tight coupling in a dual connectivity (DC) manner.
  • One of the systems acts as a master node (MN) and the other system acts as a secondary node (SN).
  • MN master node
  • SN secondary node
  • two cell groups are included: a primary cell group (MCG) and a secondary cell group (SCG).
  • the primary cell group includes one PCell and one or more SCells; the secondary cell group includes one primary secondary cell (PSCell), and one or more SCells.
  • radio link monitor functions in both LTE systems and NR systems.
  • the terminal implements monitoring of the radio link by measuring the signal to interference plus noise ratio (SINR) of the PDCCH part CRS.
  • SINR signal to interference plus noise ratio
  • the radio link is determined to be out-of-sync, and the physical layer notifies the upper layer (such as the RRC layer) of an out-of-synchronization indication, if the RRC layer receives consecutive N losses.
  • the step indication then the terminal starts a timer T1.
  • the wireless link is considered to be in-sync if the measured PDCCH portion CRS is above a certain threshold.
  • the physical layer notifies the RRC layer of a synchronization indication, and if the RRC layer continuously receives M synchronization indications, the terminal stops the timing of the timer T1. If the timer T1 times out, the terminal determines a radio link failure (RLF). The number of out-of-synchronization indications and synchronization indication counts is configured on the network device side. Further, in addition to the timer T1 timeout, the radio link fails, and the radio link control (RLC) layer data transmission reaches the maximum number of times, and the random access channel (RACH) reaches the maximum number of times. RLF will be triggered. Similarly, when the terminal times out during the handover process, the timer will also trigger a Hand Over Failure (HOF).
  • RLC radio link control
  • RACH random access channel
  • the terminal will perform the reestablishment process under the RLF or HOF. If the reestablishment is successful, the terminal will revert to the RRC connected state, but the terminal can only recover to the single carrier state. In the DC state, the configuration of the CA or the DC needs to be performed again, so that the terminal cannot quickly enter the CA or DC state when the terminal returns to the RRC connected state after the RLF or the HOF.
  • an embodiment of the present disclosure provides a radio link recovery method, including:
  • the radio link configuration information includes at least one of the following information: carrier aggregation CA Configuration information, configuration information of the dual connectivity DC, and configuration information of the bandwidth portion BWP.
  • an embodiment of the present disclosure further provides a terminal, including:
  • a first recovery module configured to recover a radio link failure or a handover failure radio link according to a radio link failure or a radio link configuration information before the handover failure; where the radio link configuration information includes the following information At least one item: configuration information of the carrier aggregation CA, configuration information of the dual connectivity DC, and configuration information of the bandwidth part BWP.
  • an embodiment of the present disclosure provides a terminal, where the terminal includes a processor, a memory, and a program stored on the memory and operable on the processor, where the program is implemented by the processor to implement the wireless link recovery method. step.
  • an embodiment of the present disclosure provides a computer readable storage medium, where a program is stored on a computer readable storage medium, and the steps of the wireless link recovery method described above are implemented when the program is executed by the processor.
  • FIG. 1 is a schematic flowchart diagram of a method for recovering a wireless link according to an embodiment of the present disclosure
  • FIG. 2 is a schematic structural diagram of a module of a terminal in an embodiment of the present disclosure
  • FIG. 3 shows a block diagram of a terminal of an embodiment of the present disclosure.
  • the embodiments of the present disclosure provide a radio link recovery method and a terminal to solve the problem that the configuration in the terminal radio link recovery process is complicated and the recovery is prolonged during the related art.
  • the embodiment of the present disclosure provides a radio link recovery method, which is applied to a terminal, as shown in FIG. 1 , and specifically includes the following steps:
  • Step 11 Restore the radio link that fails or fails to switch according to the radio link configuration information before the radio link fails or the handover fails.
  • the wireless link configuration information includes at least one of the following information: configuration information of the carrier aggregation CA, configuration information of the dual connectivity DC, and configuration information of a bandwidth part (BWP).
  • configuration information of the carrier aggregation CA configuration information of the dual connectivity DC
  • BWP bandwidth part
  • the terminal may use the RLF or HOF pre-CA configuration information, the DC configuration information, and/or the BWP configuration information to recover the restored radio link. Configure to save configuration time when wireless link recovery and reduce recovery delay.
  • the embodiment of the present disclosure is only exemplified by the configuration information of the CA or the DC, and the configuration information of the BWP can also be implemented in the same manner.
  • the configuration of the BWP in the wireless link recovery process reference may be made to the CA or The configuration of the DC, that is, the configuration information of the BWP in the embodiment of the present disclosure is replaced by the configuration information of the BWP, so that the configuration of the BWP in the wireless link recovery process can be implemented.
  • the method for recovering the radio link before the step 11 further includes: acquiring an access stratum (AS) context information before the radio link fails or the handover fails when the radio link fails or the handover fails;
  • the AS context information determines the radio link configuration information before the radio link fails or the handover fails.
  • all or part of the AS context information of the wireless link is maintained on the terminal side, and the AS context information may indicate the radio link configuration information before the radio link fails or the handover fails. That is, when the radio link fails or the handover fails, the radio link recovery procedure is started, and the AS context information that is maintained on the terminal side before the radio link fails or the handover fails is determined, and the radio link configuration is determined according to the AS context information. information. If the radio link of the terminal is successfully re-established, the reestablished radio link is directly configured by using the determined radio link configuration information, so as to save the configuration time of the radio link recovery and shorten the recovery delay.
  • AS access stratum
  • the radio link configuration information further includes at least one of the following information: physical layer configuration information, media access control (MAC) layer configuration information, and radio link control (RLC) layer configuration. Information, Packet Data Convergence Protocol (PDCP) layer configuration information, and Service Data Adaptation Protocol (SDAP) layer configuration information.
  • PDCP Packet Data Convergence Protocol
  • SDAP Service Data Adaptation Protocol
  • the terminal may also restore only the configuration of the physical layer configuration information, the MAC layer configuration information, the RLC layer configuration information, the PDCP layer configuration information, and the SDAP layer configuration information of the CA or DC, for example, only the RLC layer configuration is restored.
  • the physical layer configuration information and the MAC layer configuration information are set to the default configuration.
  • the terminal only restores the configuration of the partial parameters of each protocol layer. For example, the serial number (SN) in the PDCP layer configuration information is reset to 0, but the header compression state algorithm of the PDCP layer is maintained.
  • the radio link configuration information further includes: configuration information of the primary cell PCell and the secondary cell SCell under the CA or the DC.
  • the configuration information of the PCell includes at least the identity information of the PCell
  • the configuration information of the SCell includes at least the number of the SCell, the identity information of the SCell, and the status information of each SCell.
  • the status information of the SCell includes an active state, a deactivated state, and a new state.
  • the new state is a state between the active state and the deactivated state, allowing periodic CQI reporting based on the CRS and not monitoring the PDCCH. It is worth noting that the new state is not limited to CQI reporting, but may also include sending SRS, or receiving partial active state behavior such as PDSCH.
  • the step 11 includes: determining, according to the configuration information of the primary cell PCell under the CA or the DC, the primary cell PCell of the wireless link that fails or fails to be switched; determining the wireless according to the configuration information of the secondary cell SCell under the CA or the DC
  • the re-establishment process of the radio link is triggered.
  • the terminal Since all or part of the AS context information of the terminal remains on the terminal side, after the radio link is successfully re-established, the terminal directly restores the use of the AS context information to determine the RLF. Or configuration information of the primary cell PCell and the secondary cell SCell under the CA or DC before the HOF. Further, the terminal determines the identity information of the PCell according to the configuration information of the primary cell PCell under the CA or the DC; determines the number of the SCell, the identity information of the SCell, and the status information of each SCell according to the configuration information of the secondary cell SCell under the CA or the DC. Then, the reconstructed wireless link is configured according to the configuration information of the PCell and the SCell, so as to save the configuration time of the wireless link recovery and shorten the recovery delay.
  • the terminal is configured with one Pcell and four Scells before the RLF.
  • the terminal restores the CA configuration of one Pcell and four Scells.
  • the step of restoring the radio link according to the status information of the primary cell PCell, the secondary cell SCell, and each SCell of the wireless link includes: recovering the primary cell PCell of the wireless link according to the primary cell PCell of the wireless link. According to the secondary cell SCell of the wireless link and the status information of each SCell, each secondary cell SCell of the wireless link is restored to a state before the radio link fails or the handover fails, or each secondary cell SCell of the wireless link is restored. To the preset state, or to restore the secondary cell SCell in the activated state of the wireless link.
  • the terminal can directly configure the reconstructed wireless link according to the determined configuration information of the PCell. Because the number of SCells is indeterminate, the terminal can have different processing recovery strategies for the SCell configuration.
  • the terminal may restore each secondary cell SCell of the wireless link to a state before the radio link fails or the handover fails according to the secondary cell SCell of the wireless link and the status information of each SCell. It is assumed that the terminal is configured with four SCells before the RLF or HOF, wherein two SCells of the four Scells are in an active state, one SCell is in a new state, and one SCell is in a deactivated state. The terminal can directly configure the wireless link after successful reconstruction according to the configuration information of the four SCells.
  • the terminal may restore each secondary cell SCell of the wireless link to a preset state according to the secondary cell SCell of the wireless link and the status information of each SCell. Assuming that the terminal is configured with four SCells before the RLF or the HOF, the terminal can configure the four SCells for the wireless link after the successful reconstruction, but the terminal no longer cares about the status of the four SCells before the RLF or the HOF, but instead The SCells are directly restored to a preset state, such as a deactivated state.
  • the terminal may recover the secondary cell SCell in the activated state of the wireless link according to the secondary cell SCell of the wireless link and the status information of each SCell. It is assumed that the terminal is configured with four SCells before the RLF or HOF, wherein two SCells of the four Scells are in an active state, one SCell is in a new state, and one SCell is in a deactivated state. The terminal can configure the wireless link after the successful reconstruction according to the configuration information of the two SCells in the active state. For SCell in other states, no recovery is done.
  • the terminal may re-establish the radio link in other cells after the RLF or the HOF
  • the configuration of other cells may be different from the configuration supported by the cell before the terminal RLF or the HOF, for example, the serving cell before the failure may be There are three carrier aggregations, and the cell that is reconstructed after the failure only supports the aggregation of the two carriers. Therefore, in the radio link recovery method of the embodiment of the present disclosure, it is also possible to determine whether the terminal restores the CA or DC configuration or restores to the terminal based on the preset condition. Single carrier configuration.
  • the method further includes: if the current cell to which the current location belongs is one of the preset cell sets, performing radio link configuration information according to the radio link failure or the handover failure, and the radio link fails or The step of switching the failed wireless link for recovery; otherwise, restoring the wireless link failure or the failed handover of the wireless link to the single carrier configuration.
  • the number of carrier aggregations supported by the cells belonging to the same preset cell set is the same.
  • the network device may configure a preset cell set for the terminal or the terminal maintains a default preset cell set, where the preset cell set includes multiple cells, and if the terminal re-establishes the wireless link after the RLF or the HOF, In a cell in the preset cell set, the terminal configures the wireless link after successful reconstruction according to the configuration information of the CA or DC before the RLF or the HOF. If the terminal re-establishes the radio link in the cell other than the preset cell set after the RLF or the HOF, the radio link after the successful reestablishment is configured as a single carrier.
  • the method includes: receiving system information of a current cell broadcast to which the current location belongs, and detecting, according to the system information, whether at least part of configurations supported by the serving cell that the current cell belongs to before the radio link fails or the handover fails. That is, the terminal determines whether the current cell broadcasted by the network device is consistent with at least part of the configuration of the serving cell before the RLF or the HOF, thereby determining a configuration policy of the wireless link that is successfully reconstructed. Specifically, if it is detected that the current cell is consistent with a part of the configuration supported by the serving cell before the radio link fails or the handover fails, the radio link fails or the handover fails according to the consistent partial configuration in the radio link configuration information.
  • the link is restored; if it detects that all the configurations supported by the serving cell before the current cell fails or the handover fails, the radio link fails or the handover fails according to all configurations of the radio link configuration information.
  • the link is restored.
  • the terminal receives the system message broadcasted by the network device, thereby determining the number of carriers supported by the current zone. If the system message indicates that the current cell supports aggregation of several carriers, the terminal further determines the number of carriers and frequencies supported by the current cell and the RLF or HOF before the terminal. Whether the number of carriers and the frequency supported by the serving cell are the same. If all the packets are consistent, the CA or DC configuration of the wireless link after successful reconstruction is performed according to all configuration information of the CA or the DC.
  • CA or DC configuration is performed on the wireless link after the successful reconstruction according to the consistent part in the configuration information of the CA or the DC. If all are inconsistent, the wireless link after successful reconstruction is directly configured as a single carrier, or the reconfiguration process is started for CA or DC configuration.
  • the terminal when recovering the radio link that fails or fails to be switched, the terminal recovers the link by using the radio link configuration information before the radio link failure or the handover failure.
  • the configuration process does not require the reconfiguration process after the link is restored, which simplifies the configuration process of the radio link recovery, shortens the recovery delay, and enables the wireless link to recover quickly after the radio link fails or the handover fails.
  • the terminal 200 in the embodiment of the present disclosure can implement the radio link failure or the handover failed radio link according to the radio link configuration information before the radio link failure or the handover failure in the foregoing embodiment.
  • the wireless link configuration information includes at least one of the following information: configuration information of the carrier aggregation CA, configuration information of the dual connectivity DC, and configuration information of the bandwidth portion BWP.
  • the terminal 200 specifically includes the following functional modules:
  • the first recovery module 210 is configured to recover the radio link that fails or fails to be switched according to the radio link configuration information before the radio link failure or the handover failure, where the radio link configuration information includes the following information. At least one of: configuration information of the carrier aggregation CA, configuration information of the dual connectivity DC, and configuration information of the bandwidth part BWP.
  • the terminal 200 further includes:
  • An obtaining module configured to acquire access layer AS context information before a radio link failure or a handover failure occurs when a radio link failure or a handover failure occurs;
  • a determining module configured to determine, according to the AS context information, a radio link configuration information before the radio link fails or the handover fails.
  • the radio link configuration information includes: configuration information of the primary cell PCell and the secondary cell SCell under the CA or the DC.
  • the first recovery module 210 includes:
  • a first determining submodule configured to determine, according to configuration information of the primary cell PCell under the CA or the DC, a primary cell PCell of the wireless link that fails or fails to be switched;
  • a second determining submodule configured to determine, according to the configuration information of the secondary cell SCell under the CA or the DC, the secondary cell SCell of the wireless link that fails or fails to be switched, and status information of each SCell;
  • the first recovery submodule is configured to recover the wireless link according to the status information of the primary cell PCell, the secondary cell SCell, and each SCell of the wireless link.
  • the first recovery submodule includes:
  • a first recovery unit configured to recover a primary cell PCell of the wireless link according to the primary cell PCell of the wireless link
  • a second recovery unit configured to restore each secondary cell SCell of the wireless link to a state before the wireless link fails or the handover fails according to the secondary cell SCell of the wireless link and the status information of each SCell, or the wireless link
  • Each of the secondary cells SCell is restored to a preset state, or the secondary cell SCell of the wireless link in an activated state is restored.
  • the radio link configuration information further includes at least one of the following information: physical layer configuration information, medium access control MAC layer configuration information, radio link control RLC layer configuration information, packet data convergence protocol PDCP layer configuration information, and SDAP layer. Configuration information.
  • the terminal 200 further includes:
  • the second recovery module is configured to: when the current cell to which the current location belongs is one of the preset cell sets, perform radio link configuration information according to the radio link failure or the handover failure, and the radio link fails or the handover fails. The step of recovering from the wireless link;
  • the third recovery module is configured to restore the radio link that fails or fails to be switched to the single carrier configuration when the current cell does not belong to the preset cell set.
  • the terminal 200 further includes:
  • a receiving module configured to receive system information of a current cell broadcast to which the current location belongs
  • a detecting module configured to detect, according to the system information, whether at least part of configurations supported by the serving cell that the current cell and the radio link fail before the handover fails are consistent;
  • the first recovery module 210 further includes:
  • a second recovery sub-module configured to: when detecting that the current cell is consistent with a part of the configuration supported by the serving cell before the radio link fails or the handover fails, the radio link fails according to the consistent partial configuration in the radio link configuration information Or switching the failed wireless link for recovery;
  • a third recovery sub-module configured to: when detecting that the current cell is consistent with all configurations supported by the serving cell before the radio link fails or the handover fails, according to all configurations of the radio link configuration information, the radio link fails or the handover fails. The wireless link is restored.
  • the terminal of the embodiment of the present disclosure when the terminal of the embodiment of the present disclosure recovers the radio link that fails or fails to be switched, the terminal uses the radio link configuration information before the radio link failure or the handover failure to configure the restoration link. It is not necessary to perform the reconfiguration process after the link is restored, which simplifies the configuration process of the radio link recovery, shortens the recovery delay, and realizes the rapid recovery of the radio link after the radio link fails or the handover fails.
  • each module above is only a division of logical functions, and the actual implementation may be integrated into one physical entity in whole or in part, or may be physically separated.
  • these modules can all be implemented by software in the form of processing component calls; or all of them can be implemented in hardware form; some modules can be realized by processing component calling software, and some modules are realized by hardware.
  • the determining module may be a separately set processing element, or may be integrated in one of the above-mentioned devices, or may be stored in the memory of the above device in the form of program code, by a processing element of the above device. Call and execute the functions of the above determination module.
  • the implementation of other modules is similar.
  • all or part of these modules can be integrated or implemented independently.
  • the processing elements described herein can be an integrated circuit with signal processing capabilities. In the implementation process, each step of the above method or each of the above modules may be completed by an integrated logic circuit of hardware in the processor element or an instruction in a form of software.
  • the above modules may be one or more integrated circuits configured to implement the above method, such as one or more Application Specific Integrated Circuits (ASICs), or one or more microprocessors ( A digital signal processor (DSP), or one or more Field Programmable Gate Arrays (FPGAs).
  • ASICs Application Specific Integrated Circuits
  • DSP digital signal processor
  • FPGAs Field Programmable Gate Arrays
  • the processing component may be a general purpose processor, such as a central processing unit (CPU) or other processor that can call the program code.
  • these modules can be integrated and implemented in the form of System-On-a-Chip (SOC).
  • SOC System-On-a-Chip
  • FIG. 3 is a schematic diagram of a hardware structure of a terminal that implements various embodiments of the present disclosure.
  • the terminal 30 includes, but is not limited to, a radio frequency unit 31, a network module 32, and an audio output unit 33.
  • the terminal structure shown in FIG. 3 does not constitute a limitation to the terminal, and the terminal may include more or less components than those illustrated, or some components may be combined, or different component arrangements.
  • the terminal includes, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a palmtop computer, an in-vehicle terminal, a wearable device, and a pedometer.
  • the radio frequency unit 31 is configured to send and receive data under the control of the processor 310.
  • the processor 310 is configured to recover, according to the radio link failure information or the radio link configuration information before the handover failure, the radio link failure or the handover failed radio link, where the radio link configuration information includes at least the following information.
  • One item configuration information of the carrier aggregation CA, configuration information of the dual connectivity DC, and configuration information of the bandwidth part BWP.
  • the processor 310 is configured to acquire access layer AS context information before the radio link fails or the handover fails when the radio link fails or the handover fails.
  • the radio link configuration information before the radio link failure or the handover failure is determined.
  • the radio link configuration information includes: configuration information of the primary cell PCell and the secondary cell SCell under the CA or the DC.
  • the processor 310 is configured to determine, according to configuration information of the primary cell PCell under the CA or the DC, a primary cell PCell of the wireless link that fails or fails to be switched;
  • the radio link is restored according to the status information of the primary cell PCell, the secondary cell SCell, and each SCell of the wireless link.
  • the processor 310 is configured to recover the primary cell PCell of the wireless link according to the primary cell PCell of the wireless link.
  • the radio link configuration information further includes at least one of the following information: physical layer configuration information, medium access control MAC layer configuration information, radio link control RLC layer configuration information, packet data convergence protocol PDCP layer configuration information, and SDAP layer. Configuration information.
  • the processor 310 is configured to: if the current cell to which the current location belongs is one of the preset cell sets, perform wireless connection failure or handover failure according to the radio link configuration information before the radio link failure or the handover failure The step of recovering the link;
  • the processor 310 is configured to receive system information of a current cell broadcast to which the current location belongs;
  • the radio link fails or the handover fails the radio link according to the consistent partial configuration in the radio link configuration information. restore;
  • the radio link fails or the failed radio link is restored according to all configurations of the radio link configuration information.
  • the terminal of the embodiment of the present disclosure restores the link configuration by using the radio link configuration information before the radio link failure or the handover failure, when the radio link fails or the radio link fails to be restored.
  • the reconfiguration process is simplified, the configuration process of the radio link recovery is simplified, the recovery delay is shortened, and the wireless link is quickly restored after the radio link fails or the handover fails.
  • the radio frequency unit 31 can be used for receiving and transmitting signals during the transmission and reception of information or during a call, and specifically, after receiving downlink data from the base station, processing the data to the processor 310; The uplink data is sent to the base station.
  • radio frequency unit 31 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like.
  • the radio unit 31 can also communicate with the network and other devices through a wireless communication system.
  • the terminal provides the user with wireless broadband Internet access through the network module 32, such as helping the user to send and receive emails, browse web pages, and access streaming media.
  • the audio output unit 33 can convert the audio data received by the radio frequency unit 31 or the network module 32 or stored in the memory 39 into an audio signal and output as sound. Moreover, the audio output unit 33 can also provide audio output (eg, call signal reception sound, message reception sound, etc.) associated with a particular function performed by the terminal 30.
  • the audio output unit 33 includes a speaker, a buzzer, a receiver, and the like.
  • the input unit 34 is for receiving an audio or video signal.
  • the input unit 34 may include a graphics processing unit (GPU) 341 and a microphone 342 that images an still picture or video obtained by an image capturing device (such as a camera) in a video capturing mode or an image capturing mode.
  • the data is processed.
  • the processed image frame can be displayed on the display unit 36.
  • the image frames processed by the graphics processor 341 may be stored in the memory 39 (or other storage medium) or transmitted via the radio unit 31 or the network module 32.
  • the microphone 342 can receive sound and can process such sound as audio data.
  • the processed audio data can be converted to a format output that can be transmitted to the mobile communication base station via the radio unit 31 in the case of a telephone call mode.
  • Terminal 30 also includes at least one type of sensor 35, such as a light sensor, motion sensor, and other sensors.
  • the light sensor includes an ambient light sensor and a proximity sensor, wherein the ambient light sensor can adjust the brightness of the display panel 361 according to the brightness of the ambient light, and the proximity sensor can close the display panel 361 and/or when the terminal 30 moves to the ear. Or backlight.
  • the accelerometer sensor can detect the magnitude of acceleration in all directions (usually three axes). When it is stationary, it can detect the magnitude and direction of gravity.
  • sensor 35 may also include fingerprint sensor, pressure sensor, iris sensor, molecular sensor, gyroscope, barometer, hygrometer, thermometer, infrared Sensors, etc., will not be described here.
  • the display unit 36 is for displaying information input by the user or information provided to the user.
  • the display unit 36 can include a display panel 361.
  • the display panel 361 can be configured in the form of a liquid crystal display (LCD), an organic light-emitting diode (OLED), or the like.
  • the user input unit 37 can be used to receive input numeric or character information and to generate key signal inputs related to user settings and function control of the terminal.
  • the user input unit 37 includes a touch panel 371 and other input devices 372.
  • the touch panel 371 also referred to as a touch screen, can collect touch operations on or near the user (such as the user using a finger, a stylus, or the like on the touch panel 371 or near the touch panel 371. operating).
  • the touch panel 371 can include two parts of a touch detection device and a touch controller.
  • the touch detection device detects the touch orientation of the user, and detects a signal brought by the touch operation, and transmits the signal to the touch controller; the touch controller receives the touch information from the touch detection device, converts the touch information into contact coordinates, and sends the touch information.
  • the touch panel 371 can be implemented in various types such as resistive, capacitive, infrared, and surface acoustic waves.
  • the user input unit 37 may also include other input devices 372.
  • the other input devices 372 may include, but are not limited to, a physical keyboard, function keys (such as a volume control button, a switch button, etc.), a trackball, a mouse, and a joystick, which are not described herein.
  • the touch panel 371 can be overlaid on the display panel 361.
  • the touch panel 371 detects a touch operation on or near the touch panel 371, it is transmitted to the processor 310 to determine the type of the touch event, and then the processor 310 according to the touch.
  • the type of event provides a corresponding visual output on display panel 361.
  • the touch panel 371 and the display panel 361 are used as two independent components to implement the input and output functions of the terminal, in some embodiments, the touch panel 371 may be integrated with the display panel 361.
  • the input and output functions of the terminal are implemented, and are not limited herein.
  • the interface unit 38 is an interface in which an external device is connected to the terminal 30.
  • the external device may include a wired or wireless headset port, an external power (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, and an audio input/output. (I/O) port, video I/O port, headphone port, and more.
  • the interface unit 38 can be configured to receive input from an external device (eg, data information, power, etc.) and transmit the received input to one or more components within the terminal 30 or can be used at the terminal 30 and external devices Transfer data between.
  • the memory 39 can be used to store software programs as well as various data.
  • the memory 39 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application required for at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may be stored according to Data created by the use of the mobile phone (such as audio data, phone book, etc.).
  • the memory 39 may include a high speed random access memory, and may also include a nonvolatile memory such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.
  • the processor 310 is a control center of the terminal, which connects various parts of the entire terminal by various interfaces and lines, and executes by executing or executing software programs and/or modules stored in the memory 39, and calling data stored in the memory 39.
  • the processor 310 may include one or more processing units; optionally, the processor 310 may integrate an application processor and a modem processor, wherein the application processor mainly processes an operating system, a user interface, an application, etc., and a modulation solution
  • the processor mainly handles wireless communication. It can be understood that the above modem processor may not be integrated into the processor 310.
  • the terminal 30 may further include a power source 311 (such as a battery) for supplying power to the various components.
  • a power source 311 such as a battery
  • the power source 311 may be logically connected to the processor 310 through the power management system to manage charging, discharging, and power management through the power management system. And other functions.
  • the terminal 30 also includes some functional modules not shown, which are not described herein again.
  • an embodiment of the present disclosure further provides a terminal, including a processor 310, a memory 39, a computer program stored on the memory 39 and executable on the processor 310, when the computer program is executed by the processor 310.
  • the processes of the foregoing embodiments of the radio link recovery method are implemented, and the same technical effects can be achieved. To avoid repetition, details are not described herein again.
  • the terminal may be a wireless terminal or a wired terminal, and the wireless terminal may be a device that provides voice and/or other service data connectivity to the user, a handheld device with a wireless connection function, or other processing device connected to the wireless modem. .
  • the wireless terminal can communicate with one or more core networks via a Radio Access Network (RAN), which can be a mobile terminal, such as a mobile phone (or "cellular" phone) and a mobile terminal.
  • RAN Radio Access Network
  • the computer for example, can be a portable, pocket, handheld, computer built-in or in-vehicle mobile device that exchanges language and/or data with the wireless access network.
  • PCS Personal Communication Service
  • SIP Session Initiation Protocol
  • WLL Wireless Local Loop
  • PDA Personal digital assistant
  • the wireless terminal may also be referred to as a system, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, and a remote terminal.
  • the access terminal, the user terminal (User Terminal), the user agent (User Agent), and the user device (User Device or User Equipment) are not limited herein.
  • the embodiment of the present disclosure further provides a computer readable storage medium, where the computer readable storage medium stores a computer program, which is executed by the processor to implement various processes of the foregoing wireless link recovery method embodiment, and can achieve the same The technical effect, in order to avoid duplication, will not be repeated here.
  • the computer readable storage medium such as a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.
  • the disclosed apparatus and method may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • 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, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in various embodiments of the present disclosure may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the functions may be stored in a computer readable storage medium if implemented in the form of a software functional unit and sold or used as a standalone product. Based on such understanding, the portion of the technical solution of the present disclosure that contributes in essence or to the prior art or the portion of the technical solution may be embodied in the form of a software product stored in a storage medium, including The instructions are used to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present disclosure.
  • the foregoing storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.
  • the objects of the present disclosure can also be achieved by running a program or a set of programs on any computing device.
  • the computing device can be a well-known general purpose device.
  • the objects of the present disclosure may also be realized by merely providing a program product including program code for implementing the method or apparatus. That is to say, such a program product also constitutes the present disclosure, and a storage medium storing such a program product also constitutes the present disclosure.
  • the storage medium may be any known storage medium or any storage medium developed in the future.
  • various components or steps may be decomposed and/or recombined.

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Abstract

本公开公开了一种无线链路恢复方法及终端，其方法包括：根据无线链路失败或切换失败前的无线链路配置信息，对无线链路失败或切换失败的无线链路进行恢复；其中，无线链路配置信息包括以下信息中的至少一项：载波聚合CA的配置信息、双连接DC的配置信息和带宽部分BWP的配置信息。

Description

无线链路恢复方法及终端
相关申请的交叉引用
本申请主张在2018年1月4日在中国提交的中国专利申请No.201810009127.8的优先权，其全部内容通过引用包含于此。
技术领域
本公开涉及通信技术领域，尤其涉及一种无线链路恢复方法及终端。
背景技术
第四代(4 th Generation，4G)移动通信系统，或称为长期演进型(Long Time Evolution，LTE)系统中引入了载波聚合(Carrier Aggregation，CA)技术。其中，载波聚合技术为一个终端，或称为用户设备(User Equipment，UE)，通过多个小区(Cell)和网络进行连接通信。其中，一个小区作为终端的主小区(Primary Cell，PCell)，其他小区作为终端的辅小区(Secondary Cell，SCell)。其中，SCell有激活状态和去激活状态，PCell一直保持激活状态，而没有去激活状态。其中，网络设备通过无线资源控制(Radio Resource Control，RRC)连接重配置(Connection Reconfiguration)消息添加一个或多个SCell时，添加的一个或多个SCell的初始状态均为去激活状态。在切换场景下类似，目标网络设备可通过切换命令(Handover Command)发送SCell的配置信息给源网络设备，目标网络设备通过RRC连接重配置消息转发给终端，其中，所有SCell的初始状态均为去激活状态。
终端为每个SCell维护一个去激活定时器(SCell Deactivation Timer)，当SCell进入激活状态时，终端启动相应的去激活定时器，若在该去激活定时器超时后终端未在对应的SCell上收到数据或物理下行控制信道(Physical Downlink Control Channel，PDCCH)消息，则终端自动将该SCell去激活。目前SCell的激活/去激活机制是基于介质访问控制(Media Access Control，MAC)控制元素(Control Element，CE)和去激活定时器的结合来实现。
由于去激活状态转换到激活状态时延较大，为了减少时延，在第五代(5 th  Generation，5G)移动通信系统，或称为新空口(New Radio，NR)系统中，引入了一种新状态(new fast SCell activation state/SCell new state)，在该新状态介于激活和去激活之间，允许基于小区参考信号(Cell Reference Signal，CRS)进行周期信道质量指示(Channel Quality Indicator，CQI)上报，并且不监听PDCCH，但不仅限于CQI上报，也可以包括发送信道探测参考信号(Sounding Reference Signal，SRS)或接收物理下行共享信道(Physical Downlink Share Channel，PDSCH)等部分激活态行为。
目前LTE系统和5G系统需要以双连接(Dual Connectivity，DC)方式进行紧耦合。其中一个系统作为主控节点(Master Node，MN)，另外一个系统作为辅助节点(Secondary Node，SN)。在双连接系统中，包括两个小区组：主小区组(Master Cell Group，MCG)和辅小区组(Secondary Cell Group，SCG)。主小区组包括一个PCell，以及一个或多个SCell；辅小区组包括一个主辅小区(Primary Secondary Cell，PSCell)，以及一个或多个SCell。
在LTE系统或NR系统中都会有无线链路监听(Radio Link Monitor，RLM)功能。在LTE系统的RLM功能中终端是通过测量PDCCH部分CRS的信号与干扰加噪声比(Signal to Interference plus Noise Ratio，SINR)来实现对无线链路的监听。当测量的PDCCH部分CRS低于一定门限则认定该无线链路失步(out-of-sync)，则物理层通知高层(如RRC层)一个失步指示，如果RRC层接收到连续N个失步指示则终端开启一个定时器T1。如果当测量的PDCCH部分CRS高于一定门限则认定该无线链路同步(in-sync)。则物理层通知RRC层一个同步指示，如果RRC层连续接收到M个同步指示则终端停止定时器T1的计时。如果定时器T1超时，则终端判断无线链路失败(Radio Link Failure，RLF)。其中失步指示和同步指示计数的次数是网络设备侧配置的。进一步地，除了定时器T1超时会触发无线链路失败，当终端的无线链路控制(Radio Link Control，RLC)层数据发送达到最大次数、随机接入信道(Random Access Channel，RACH)达到最大次数都会触发RLF。同理，当终端在切换过程中定时器超时还会触发切换失败(Hand Over Failure，HOF)。
在载波聚合场景或双连接场景下，终端在RLF或HOF下将进行重建过程，若重建成功，终端将恢复到RRC连接态，但是此时终端只能恢复至单载 波状态，若终端想应用CA或DC状态，则需要重新进行CA或DC的配置，从而导致终端在RLF或HOF后恢复到RRC连接态时，无法快速进入CA或DC状态。
发明内容
第一方面，本公开实施例提供了一种无线链路恢复方法，包括：
根据无线链路失败或切换失败前的无线链路配置信息，对无线链路失败或切换失败的无线链路进行恢复；其中，无线链路配置信息包括以下信息中的至少一项：载波聚合CA的配置信息、双连接DC的配置信息和带宽部分BWP的配置信息。
第二方面，本公开实施例还提供了一种终端，包括：
第一恢复模块，用于根据无线链路失败或切换失败前的无线链路配置信息，对无线链路失败或切换失败的无线链路进行恢复；其中，无线链路配置信息包括以下信息中的至少一项：载波聚合CA的配置信息、双连接DC的配置信息和带宽部分BWP的配置信息。
第三方面，本公开实施例提供了一种终端，终端包括处理器、存储器以及存储于存储器上并可在处理器上运行的程序，程序被处理器执行时实现上述的无线链路恢复方法的步骤。
第四方面，本公开实施例提供了一种计算机可读存储介质，计算机可读存储介质上存储有程序，程序被处理器执行时实现上述的无线链路恢复方法的步骤。
附图说明
为了更清楚地说明本公开实施例的技术方案，下面将对本公开实施例的描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本公开的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1表示本公开实施例的无线链路恢复方法的流程示意图；
图2表示本公开实施例中终端的模块结构示意图；
图3表示本公开实施例的终端框图。
具体实施方式
下面将参照附图更详细地描述本公开的示例性实施例。虽然附图中显示了本公开的示例性实施例，然而应当理解，可以以各种形式实现本公开而不应被这里阐述的实施例所限制。相反，提供这些实施例是为了能够更透彻地理解本公开，并且能够将本公开的范围完整的传达给本领域的技术人员。
本申请的说明书和权利要求书中的术语“第一”、“第二”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。应该理解这样使用的数据在适当情况下可以互换，以便这里描述的本申请的实施例例如能够以除了在这里图示或描述的那些以外的顺序实施。此外，术语“包括”和“具有”以及他们的任何变形，意图在于覆盖不排他的包含，例如，包含了一系列步骤或单元的过程、方法、系统、产品或设备不必限于清楚地列出的那些步骤或单元，而是可包括没有清楚地列出的或对于这些过程、方法、产品或设备固有的其它步骤或单元。
本公开实施例提供了一种无线链路恢复方法及终端，以解决相关技术中终端无线链路恢复过程中配置复杂，恢复时延长的问题。
本公开实施例提供了一种无线链路恢复方法，应用于终端，如图1所示，具体包括以下步骤：
步骤11：根据无线链路失败或切换失败前的无线链路配置信息，对无线链路失败或切换失败的无线链路进行恢复。
其中，无线链路配置信息包括以下信息中的至少一项：载波聚合CA的配置信息、双连接DC的配置信息和带宽部分(Bandwidth Part，BWP)的配置信息。这样，终端在无线链路失败或切换失败时，对无线链路进行恢复时可采用RLF或HOF前CA的配置信息、DC的配置信息和/或BWP的配置信息，对恢复的无线链路进行配置，以节省无线链路恢复时的配置时间，缩短恢复时延。其中，值得指出的是，本公开实施例仅以CA或DC的配置信息做示例性说明，BWP的配置信息亦可采用相同的方式实现，对于无线链路恢复过程中BWP的配置可参照CA或DC的配置，即将BWP的配置信息替换 本公开实施例中CA或DC的配置信息，即可实现无线链路恢复过程中的BWP的配置。
进一步地，在步骤11之前该无线链路恢复方法还包括：当发生无线链路失败或切换失败时，获取无线链路失败或切换失败前的接入层(Access Stratum，AS)上下文信息；根据AS上下文信息，确定无线链路失败或切换失败前的无线链路配置信息。其中，无线链路的全部或部分AS上下文信息保持在终端侧，AS上下文信息可指示无线链路失败或切换失败前的无线链路配置信息。也就是说，当终端发生无线链路失败或切换失败时，启动无线链路恢复流程，获取无线链路失败或切换失败前保持在终端侧的AS上下文信息，根据AS上下文信息确定无线链路配置信息。若终端的无线链路重建成功，则直接采用确定的无线链路配置信息对重建的无线链路进行配置，以节省无线链路恢复时的配置时间，缩短恢复时延。
进一步地，无线链路配置信息还包括以下信息中的至少一项：物理层配置信息、介质访问控制(Media Access Control，MAC)层配置信息、无线链路控制(Radio Link Control，RLC)层配置信息、分组数据汇聚协议(Packet Data Convergence Protocol，PDCP)层配置信息和业务数据适配协议(Service Data Adaptation Protocol，SDAP)层配置信息。可选地，当终端发生了RLF或HOF后，触发无线链路重建过程，由于终端的全部或部分AS上下文信息保持在终端侧，终端在无线链路重建成功后，直接恢复AS上下文信息的使用，从而确定所有CA或DC下的配置信息。可选地，终端还可以只恢复CA或DC下物理层配置信息、MAC层配置信息、RLC层配置信息、PDCP层配置信息和SDAP层配置信息中的部分层的配置，例如只恢复RLC层配置信息及PDCP层配置信息和SDAP层配置信息。物理层配置信息及MAC层配置信息设置为缺省配置。可选地，终端只恢复各个协议层的部分参数的配置，例如PDCP层配置信息中的序列号(Serial Number，SN)重置为0，但是PDCP层的头压缩状态算法被保持。
进一步地，无线链路配置信息还包括：CA或DC下主小区PCell和辅小区SCell的配置信息。其中，PCell的配置信息至少包括PCell的身份信息，SCell的配置信息至少包括：SCell的个数、SCell的身份信息，以及各SCell 的状态信息。其中，SCell的状态信息包括：激活态、去激活态以及新状态。新状态为介于激活态和去激活态之间的状态，允许基于CRS进行周期CQI上报，并且不监听PDCCH。值得指出的是，新状态不仅限于CQI上报，也可以包括发送SRS，或接收PDSCH等部分激活态行为。
具体地，步骤11包括：根据CA或DC下主小区PCell的配置信息，确定无线链路失败或切换失败的无线链路的主小区PCell；根据CA或DC下辅小区SCell的配置信息，确定无线链路失败或切换失败的无线链路的辅小区SCell以及各SCell的状态信息；根据无线链路的主小区PCell、辅小区SCell以及各SCell的状态信息，对无线链路进行恢复。终端发生了RLF或HOF后，触发无线链路的重建过程，由于终端的全部或部分AS上下文信息保持在终端侧，那么在无线链路重建成功后，终端直接恢复AS上下文信息的使用，确定RLF或HOF前的CA或DC下主小区PCell和辅小区SCell的配置信息。进一步地，终端根据CA或DC下主小区PCell的配置信息，确定PCell的身份信息；根据CA或DC下辅小区SCell的配置信息，确定SCell的个数、SCell的身份信息以及各SCell的状态信息，再根据上述PCell和SCell的配置信息对重建成功的无线链路进行配置，以节省无线链路恢复时的配置时间，缩短恢复时延。
例如，终端在RLF前是配置了1个Pcell和4个Scell的CA，那么当终端的无线链路重建成功时，终端则恢复1个Pcell和4个Scell的CA配置。
进一步地，根据无线链路的主小区PCell、辅小区SCell以及各SCell的状态信息对无线链路进行恢复的步骤包括：根据无线链路的主小区PCell，将无线链路的主小区PCell进行恢复；根据无线链路的辅小区SCell以及各SCell的状态信息，将无线链路的各个辅小区SCell恢复至无线链路失败或切换失败前的状态，或者，将无线链路的各个辅小区SCell恢复至预设状态，或者，对无线链路的处于激活态的辅小区SCell进行恢复。
这里是说，由于PScell的个数是一个，且状态为激活态，因此终端可直接根据确定的PCell的配置信息对重建成功的无线链路进行配置。由于SCell的个数状态均不确定，因此对于SCell的配置，终端可以有不同处理恢复策略。
在一些可选的实施例中，终端可以根据无线链路的辅小区SCell以及各SCell的状态信息，将无线链路的各个辅小区SCell恢复至无线链路失败或切换失败前的状态。假设终端在RLF或HOF前配置有4个SCell，其中，这4个Scell中有两个SCell处于激活态，一个SCell处于新状态，一个SCell处于去激活态。终端可以直接按照这4个SCell的配置信息，对重建成功后的无线链路进行配置。
在另一些可选的实施例中，终端可以根据无线链路的辅小区SCell以及各SCell的状态信息，将无线链路的各个辅小区SCell恢复至预设状态。假设终端在RLF或HOF前配置有4个SCell，终端可为重建成功后的无线链路配置这4个SCell，但终端不再关心RLF或HOF前这4个SCell的状态，而是将这4个SCell直接恢复至某个预设状态，如去激活态。
在另一些可选的实施例中，终端可以根据无线链路的辅小区SCell以及各SCell的状态信息，对无线链路的处于激活态的辅小区SCell进行恢复。假设终端在RLF或HOF前配置有4个SCell，其中，这4个Scell中有两个SCell处于激活态，一个SCell处于新状态，一个SCell处于去激活态。终端可以只根据处于激活态的两个SCell的配置信息，对重建成功后的无线链路进行配置。而对于处于其他状态的SCell不做恢复。
进一步地，由于终端在RLF或HOF后，可能将无线链路重建在其他小区，而其他小区的配置可能和终端RLF或HOF前接受服务的小区支持的配置不一样，比如失败前的服务小区可以有3个载波聚合，而失败后重建的小区只支持两个载波的聚合，因此本公开实施例的无线链路恢复方法中，还可基于预设条件判断终端是恢复CA或DC配置还是恢复至单载波配置。
具体地，在步骤11之前还包括：若当前位置所属的当前小区为预设小区集合中的一个，则执行根据无线链路失败或切换失败前的无线链路配置信息，对无线链路失败或切换失败的无线链路进行恢复的步骤；否则，将无线链路失败或切换失败的无线链路恢复至单载波配置。其中，同属于同一预设小区集合的各个小区所支持的载波聚合数目相同。具体地，网络设备可以为终端配置一个预设小区集合或终端保持有一个默认的预设小区集合，该预设小区集合中包括多个小区，如果终端在RLF或HOF后将无线链路重建在预设小 区集合中的一个小区内，则终端根据RLF或HOF前的CA或DC的配置信息，配置重建成功后的无线链路。如果终端在RLF或HOF后将无线链路重建预设小区集合之外的小区内，则将重建成功后的无线链路配置为单载波。
或者，在步骤11之前包括：接收当前位置所属的当前小区广播的系统信息；根据系统信息，检测当前小区与无线链路失败或切换失败前所属的服务小区支持的至少部分配置是否一致。即终端根据网络设备广播的当前小区是否与RLF或HOF前的服务小区的至少部分配置是否一致，从而确定重建成功的无线链路的配置策略。具体地，若检测到当前小区与无线链路失败或切换失败前所属的服务小区支持的部分配置一致，则根据无线链路配置信息中一致的部分配置，对无线链路失败或切换失败的无线链路进行恢复；若检测到当前小区与无线链路失败或切换失败前所属的服务小区支持的全部配置一致，则根据无线链路配置信息的全部配置，对无线链路失败或切换失败的无线链路进行恢复。终端接收网络设备广播的系统消息，从而确定当前区所支持的载波数，如果系统消息指示当前小区支持几个载波的聚合，终端进一步判断当前小区支持的载波数和频率和终端RLF或HOF前的服务小区所支持的载波数和频率是否一致，如果全部一致，则根据CA或DC的全部配置信息对重建成功后的无线链路进行CA或DC配置。如果部分一致，则根据CA或DC的配置信息中一致的部分，对重建成功后的无线链路进行CA或DC配置。若全部不一致，则直接将重建成功后的无线链路配置为单载波，或者，启动重配置流程进行CA或DC配置。
本公开实施例的无线链路恢复方法中，终端在对无线链路失败或切换失败的无线链路进行恢复时，采用无线链路失败或切换失败前的无线链路配置信息进行恢复链路的配置，而不必在链路恢复后进行重配置流程，简化了无线链路恢复的配置流程，缩短了恢复时延，实现无线链路在无线链路失败或切换失败后的快速恢复。
以上实施例分别详细介绍了不同场景下的无线链路恢复方法，下面本实施例将结合附图对其对应的终端做进一步介绍。
如图2所示，本公开实施例的终端200，能实现上述实施例中根据无线链路失败或切换失败前的无线链路配置信息，对无线链路失败或切换失败的 无线链路进行恢复方法的细节，并达到相同的效果，其中，无线链路配置信息包括以下信息中的至少一项：载波聚合CA的配置信息、双连接DC的配置信息和带宽部分BWP的配置信息。该终端200具体包括以下功能模块：
第一恢复模块210，用于根据无线链路失败或切换失败前的无线链路配置信息，对无线链路失败或切换失败的无线链路进行恢复；其中，无线链路配置信息包括以下信息中的至少一项：载波聚合CA的配置信息、双连接DC的配置信息和带宽部分BWP的配置信息。
其中，终端200还包括：
获取模块，用于当发生无线链路失败或切换失败时，获取无线链路失败或切换失败前的接入层AS上下文信息；
确定模块，用于根据AS上下文信息，确定无线链路失败或切换失败前的无线链路配置信息。
其中，无线链路配置信息包括：CA或DC下主小区PCell和辅小区SCell的配置信息。
其中，第一恢复模块210包括：
第一确定子模块，用于根据CA或DC下主小区PCell的配置信息，确定无线链路失败或切换失败的无线链路的主小区PCell；
第二确定子模块，用于根据CA或DC下辅小区SCell的配置信息，确定无线链路失败或切换失败的无线链路的辅小区SCell以及各SCell的状态信息；
第一恢复子模块，用于根据无线链路的主小区PCell、辅小区SCell以及各SCell的状态信息，对无线链路进行恢复。
其中，第一恢复子模块包括：
第一恢复单元，用于根据无线链路的主小区PCell，将无线链路的主小区PCell进行恢复；
第二恢复单元，用于根据无线链路的辅小区SCell以及各SCell的状态信息，将无线链路的各个辅小区SCell恢复至无线链路失败或切换失败前的状态，或者，将无线链路的各个辅小区SCell恢复至预设状态，或者，对无线链路的处于激活态的辅小区SCell进行恢复。
其中，无线链路配置信息还包括以下信息中的至少一项：物理层配置信 息、介质访问控制MAC层配置信息、无线链路控制RLC层配置信息、分组数据汇聚协议PDCP层配置信息和SDAP层配置信息。
其中，终端200还包括：
第二恢复模块，用于在当前位置所属的当前小区为预设小区集合中的一个时，执行根据无线链路失败或切换失败前的无线链路配置信息，对无线链路失败或切换失败的无线链路进行恢复的步骤；
第三恢复模块，用于在当前小区不属于预设小区集合时，将无线链路失败或切换失败的无线链路恢复至单载波配置。
其中，终端200还包括：
接收模块，用于接收当前位置所属的当前小区广播的系统信息；
检测模块，用于根据系统信息，检测当前小区与无线链路失败或切换失败前所属的服务小区支持的至少部分配置是否一致；
第一恢复模块210还包括：
第二恢复子模块，用于当检测到当前小区与无线链路失败或切换失败前所属的服务小区支持的部分配置一致时，根据无线链路配置信息中一致的部分配置，对无线链路失败或切换失败的无线链路进行恢复；
第三恢复子模块，用于当检测到当前小区与无线链路失败或切换失败前所属的服务小区支持的全部配置一致，根据无线链路配置信息的全部配置，对无线链路失败或切换失败的无线链路进行恢复。
值得指出的是，本公开实施例的终端在对无线链路失败或切换失败的无线链路进行恢复时，采用无线链路失败或切换失败前的无线链路配置信息进行恢复链路的配置，而不必在链路恢复后进行重配置流程，简化了无线链路恢复的配置流程，缩短了恢复时延，实现无线链路在无线链路失败或切换失败后的快速恢复。
需要说明的是，应理解以上各个模块的划分仅仅是一种逻辑功能的划分，实际实现时可以全部或部分集成到一个物理实体上，也可以物理上分开。且这些模块可以全部以软件通过处理元件调用的形式实现；也可以全部以硬件的形式实现；还可以部分模块通过处理元件调用软件的形式实现，部分模块通过硬件的形式实现。例如，确定模块可以为单独设立的处理元件，也可以 集成在上述装置的某一个芯片中实现，此外，也可以以程序代码的形式存储于上述装置的存储器中，由上述装置的某一个处理元件调用并执行以上确定模块的功能。其它模块的实现与之类似。此外这些模块全部或部分可以集成在一起，也可以独立实现。这里所述的处理元件可以是一种集成电路，具有信号的处理能力。在实现过程中，上述方法的各步骤或以上各个模块可以通过处理器元件中的硬件的集成逻辑电路或者软件形式的指令完成。
例如，以上这些模块可以是被配置成实施以上方法的一个或多个集成电路，例如：一个或多个特定集成电路(Application Specific Integrated Circuit，简称ASIC)，或，一个或多个微处理器(digital signal processor，简称DSP)，或，一个或者多个现场可编程门阵列(Field Programmable Gate Array，简称FPGA)等。再如，当以上某个模块通过处理元件调度程序代码的形式实现时，该处理元件可以是通用处理器，例如中央处理器(Central Processing Unit，简称CPU)或其它可以调用程序代码的处理器。再如，这些模块可以集成在一起，以片上系统(System-On-a-Chip，简称SOC)的形式实现。
为了更好的实现上述目的，进一步地，图3为实现本公开各个实施例的一种终端的硬件结构示意图，该终端30包括但不限于：射频单元31、网络模块32、音频输出单元33、输入单元34、传感器35、显示单元36、用户输入单元37、接口单元38、存储器39、处理器310、以及电源311等部件。本领域技术人员可以理解，图3中示出的终端结构并不构成对终端的限定，终端可以包括比图示更多或更少的部件，或者组合某些部件，或者不同的部件布置。在本公开实施例中，终端包括但不限于手机、平板电脑、笔记本电脑、掌上电脑、车载终端、可穿戴设备、以及计步器等。
其中，射频单元31，用于在处理器310的控制下收发数据；
处理器310，用于根据无线链路失败或切换失败前的无线链路配置信息，对无线链路失败或切换失败的无线链路进行恢复；其中，无线链路配置信息包括以下信息中的至少一项：载波聚合CA的配置信息、双连接DC的配置信息和带宽部分BWP的配置信息。
处理器310，用于当发生无线链路失败或切换失败时，获取无线链路失败或切换失败前的接入层AS上下文信息；
根据AS上下文信息，确定无线链路失败或切换失败前的无线链路配置信息。
其中，无线链路配置信息包括：CA或DC下主小区PCell和辅小区SCell的配置信息。
处理器310，用于根据CA或DC下主小区PCell的配置信息，确定无线链路失败或切换失败的无线链路的主小区PCell；
根据CA或DC下辅小区SCell的配置信息，确定无线链路失败或切换失败的无线链路的辅小区SCell以及各SCell的状态信息；
根据无线链路的主小区PCell、辅小区SCell以及各SCell的状态信息，对无线链路进行恢复。
处理器310，用于根据无线链路的主小区PCell，将无线链路的主小区PCell进行恢复；
根据无线链路的辅小区SCell以及各SCell的状态信息，将无线链路的各个辅小区SCell恢复至无线链路失败或切换失败前的状态，或者，将无线链路的各个辅小区SCell恢复至预设状态，或者，对无线链路的处于激活态的辅小区SCell进行恢复。
其中，无线链路配置信息还包括以下信息中的至少一项：物理层配置信息、介质访问控制MAC层配置信息、无线链路控制RLC层配置信息、分组数据汇聚协议PDCP层配置信息和SDAP层配置信息。
处理器310，用于若当前位置所属的当前小区为预设小区集合中的一个，则执行根据无线链路失败或切换失败前的无线链路配置信息，对无线链路失败或切换失败的无线链路进行恢复的步骤；
否则，将无线链路失败或切换失败的无线链路恢复至单载波配置。
处理器310，用于接收当前位置所属的当前小区广播的系统信息；
根据系统信息，检测当前小区与无线链路失败或切换失败前所属的服务小区支持的至少部分配置是否一致；
若检测到当前小区与无线链路失败或切换失败前所属的服务小区支持的部分配置一致，则根据无线链路配置信息中一致的部分配置，对无线链路失败或切换失败的无线链路进行恢复；
若检测到当前小区与无线链路失败或切换失败前所属的服务小区支持的全部配置一致，则根据无线链路配置信息的全部配置，对无线链路失败或切换失败的无线链路进行恢复。
本公开实施例的终端，在对无线链路失败或切换失败的无线链路进行恢复时，采用无线链路失败或切换失败前的无线链路配置信息进行恢复链路的配置，而不必在链路恢复后进行重配置流程，简化了无线链路恢复的配置流程，缩短了恢复时延，实现无线链路在无线链路失败或切换失败后的快速恢复。
应理解的是，本公开实施例中，射频单元31可用于收发信息或通话过程中，信号的接收和发送，具体的，将来自基站的下行数据接收后，给处理器310处理；另外，将上行的数据发送给基站。通常，射频单元31包括但不限于天线、至少一个放大器、收发信机、耦合器、低噪声放大器、双工器等。此外，射频单元31还可以通过无线通信系统与网络和其他设备通信。
终端通过网络模块32为用户提供了无线的宽带互联网访问，如帮助用户收发电子邮件、浏览网页和访问流式媒体等。
音频输出单元33可以将射频单元31或网络模块32接收的或者在存储器39中存储的音频数据转换成音频信号并且输出为声音。而且，音频输出单元33还可以提供与终端30执行的特定功能相关的音频输出(例如，呼叫信号接收声音、消息接收声音等等)。音频输出单元33包括扬声器、蜂鸣器以及受话器等。
输入单元34用于接收音频或视频信号。输入单元34可以包括图形处理器(Graphics Processing Unit，GPU)341和麦克风342，图形处理器341对在视频捕获模式或图像捕获模式中由图像捕获装置(如摄像头)获得的静态图片或视频的图像数据进行处理。处理后的图像帧可以显示在显示单元36上。经图形处理器341处理后的图像帧可以存储在存储器39(或其它存储介质)中或者经由射频单元31或网络模块32进行发送。麦克风342可以接收声音，并且能够将这样的声音处理为音频数据。处理后的音频数据可以在电话通话模式的情况下转换为可经由射频单元31发送到移动通信基站的格式输出。
终端30还包括至少一种传感器35，比如光传感器、运动传感器以及其 他传感器。具体地，光传感器包括环境光传感器及接近传感器，其中，环境光传感器可根据环境光线的明暗来调节显示面板361的亮度，接近传感器可在终端30移动到耳边时，关闭显示面板361和/或背光。作为运动传感器的一种，加速计传感器可检测各个方向上(一般为三轴)加速度的大小，静止时可检测出重力的大小及方向，可用于识别终端姿态(比如横竖屏切换、相关游戏、磁力计姿态校准)、振动识别相关功能(比如计步器、敲击)等；传感器35还可以包括指纹传感器、压力传感器、虹膜传感器、分子传感器、陀螺仪、气压计、湿度计、温度计、红外线传感器等，在此不再赘述。
显示单元36用于显示由用户输入的信息或提供给用户的信息。显示单元36可包括显示面板361，可以采用液晶显示器(Liquid Crystal Display，LCD)、有机发光二极管(Organic Light-Emitting Diode,OLED)等形式来配置显示面板361。
用户输入单元37可用于接收输入的数字或字符信息，以及产生与终端的用户设置以及功能控制有关的键信号输入。具体地，用户输入单元37包括触控面板371以及其他输入设备372。触控面板371，也称为触摸屏，可收集用户在其上或附近的触摸操作(比如用户使用手指、触笔等任何适合的物体或附件在触控面板371上或在触控面板371附近的操作)。触控面板371可包括触摸检测装置和触摸控制器两个部分。其中，触摸检测装置检测用户的触摸方位，并检测触摸操作带来的信号，将信号传送给触摸控制器；触摸控制器从触摸检测装置上接收触摸信息，并将它转换成触点坐标，再送给处理器310，接收处理器310发来的命令并加以执行。此外，可以采用电阻式、电容式、红外线以及表面声波等多种类型实现触控面板371。除了触控面板371，用户输入单元37还可以包括其他输入设备372。具体地，其他输入设备372可以包括但不限于物理键盘、功能键(比如音量控制按键、开关按键等)、轨迹球、鼠标、操作杆，在此不再赘述。
进一步的，触控面板371可覆盖在显示面板361上，当触控面板371检测到在其上或附近的触摸操作后，传送给处理器310以确定触摸事件的类型，随后处理器310根据触摸事件的类型在显示面板361上提供相应的视觉输出。虽然在图3中，触控面板371与显示面板361是作为两个独立的部件来实现 终端的输入和输出功能，但是在某些实施例中，可以将触控面板371与显示面板361集成而实现终端的输入和输出功能，具体此处不做限定。
接口单元38为外部装置与终端30连接的接口。例如，外部装置可以包括有线或无线头戴式耳机端口、外部电源(或电池充电器)端口、有线或无线数据端口、存储卡端口、用于连接具有识别模块的装置的端口、音频输入/输出(I/O)端口、视频I/O端口、耳机端口等等。接口单元38可以用于接收来自外部装置的输入(例如，数据信息、电力等等)并且将接收到的输入传输到终端30内的一个或多个元件或者可以用于在终端30和外部装置之间传输数据。
存储器39可用于存储软件程序以及各种数据。存储器39可主要包括存储程序区和存储数据区，其中，存储程序区可存储操作系统、至少一个功能所需的应用程序(比如声音播放功能、图像播放功能等)等；存储数据区可存储根据手机的使用所创建的数据(比如音频数据、电话本等)等。此外，存储器39可以包括高速随机存取存储器，还可以包括非易失性存储器，例如至少一个磁盘存储器件、闪存器件、或其他易失性固态存储器件。
处理器310是终端的控制中心，利用各种接口和线路连接整个终端的各个部分，通过运行或执行存储在存储器39内的软件程序和/或模块，以及调用存储在存储器39内的数据，执行终端的各种功能和处理数据，从而对终端进行整体监控。处理器310可包括一个或多个处理单元；可选地，处理器310可集成应用处理器和调制解调处理器，其中，应用处理器主要处理操作系统、用户界面和应用程序等，调制解调处理器主要处理无线通信。可以理解的是，上述调制解调处理器也可以不集成到处理器310中。
终端30还可以包括给各个部件供电的电源311(比如电池)，可选地，电源311可以通过电源管理系统与处理器310逻辑相连，从而通过电源管理系统实现管理充电、放电、以及功耗管理等功能。
另外，终端30还包括一些未示出的功能模块，在此不再赘述。
可选地，本公开实施例还提供一种终端，包括处理器310，存储器39，存储在存储器39上并可在所述处理器310上运行的计算机程序，该计算机程序被处理器310执行时实现上述无线链路恢复方法实施例的各个过程，且能达到相同的技术效果，为避免重复，这里不再赘述。其中，终端可以是无线 终端也可以是有线终端，无线终端可以是指向用户提供语音和/或其他业务数据连通性的设备，具有无线连接功能的手持式设备、或连接到无线调制解调器的其他处理设备。无线终端可以经无线接入网(Radio Access Network，简称RAN)与一个或多个核心网进行通信，无线终端可以是移动终端，如移动电话(或称为“蜂窝”电话)和具有移动终端的计算机，例如，可以是便携式、袖珍式、手持式、计算机内置的或者车载的移动装置，它们与无线接入网交换语言和/或数据。例如，个人通信业务(Personal Communication Service，简称PCS)电话、无绳电话、会话发起协议(Session Initiation Protocol，简称SIP)话机、无线本地环路(Wireless Local Loop，简称WLL)站、个人数字助理(Personal Digital Assistant，简称PDA)等设备。无线终端也可以称为系统、订户单元(Subscriber Unit)、订户站(Subscriber Station)，移动站(Mobile Station)、移动台(Mobile)、远程站(Remote Station)、远程终端(Remote Terminal)、接入终端(Access Terminal)、用户终端(User Terminal)、用户代理(User Agent)、用户设备(User Device or User Equipment)，在此不作限定。
本公开实施例还提供一种计算机可读存储介质，计算机可读存储介质上存储有计算机程序，该计算机程序被处理器执行时实现上述无线链路恢复方法实施例的各个过程，且能达到相同的技术效果，为避免重复，这里不再赘述。其中，所述的计算机可读存储介质，如只读存储器(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。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本公开的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的实施例中，应该理解到，所揭露的装置和方法，可以 通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本公开各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本公开的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本公开各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、ROM、RAM、磁碟或者光盘等各种可以存储程序代码的介质。
此外，需要指出的是，在本公开的装置和方法中，显然，各部件或各步骤是可以分解和/或重新组合的。这些分解和/或重新组合应视为本公开的等效方案。并且，执行上述系列处理的步骤可以自然地按照说明的顺序按时间顺序执行，但是并不需要一定按照时间顺序执行，某些步骤可以并行或彼此独立地执行。对本领域的普通技术人员而言，能够理解本公开的方法和装置的全部或者任何步骤或者部件，可以在任何计算装置(包括处理器、存储介质等)或者计算装置的网络中，以硬件、固件、软件或者它们的组合加以实现，这是本领域普通技术人员在阅读了本公开的说明的情况下运用他们的基本编 程技能就能实现的。
因此，本公开的目的还可以通过在任何计算装置上运行一个程序或者一组程序来实现。所述计算装置可以是公知的通用装置。因此，本公开的目的也可以仅仅通过提供包含实现所述方法或者装置的程序代码的程序产品来实现。也就是说，这样的程序产品也构成本公开，并且存储有这样的程序产品的存储介质也构成本公开。显然，所述存储介质可以是任何公知的存储介质或者将来所开发出来的任何存储介质。还需要指出的是，在本公开的装置和方法中，显然，各部件或各步骤是可以分解和/或重新组合的。这些分解和/或重新组合应视为本公开的等效方案。并且，执行上述系列处理的步骤可以自然地按照说明的顺序按时间顺序执行，但是并不需要一定按照时间顺序执行。某些步骤可以并行或彼此独立地执行。
以上所述的是本公开的可选实施方式，应当指出对于本技术领域的普通人员来说，在不脱离本公开所述的原理前提下还可以作出若干改进和润饰，这些改进和润饰也在本公开的保护范围内。

Claims (18)

  1. 一种无线链路恢复方法，包括：
    根据无线链路失败或切换失败前的无线链路配置信息，对无线链路失败或切换失败的无线链路进行恢复；其中，所述无线链路配置信息包括以下信息中的至少一项：载波聚合CA的配置信息、双连接DC的配置信息和带宽部分BWP的配置信息。
  2. 根据权利要求1所述的无线链路恢复方法，其中，所述根据无线链路失败或切换失败前的无线链路配置信息，对无线链路失败或切换失败的无线链路进行恢复的步骤之前，还包括：
    当发生无线链路失败或切换失败时，获取无线链路失败或切换失败前的接入层AS上下文信息；
    根据所述AS上下文信息，确定无线链路失败或切换失败前的无线链路配置信息。
  3. 根据权利要求1所述的无线链路恢复方法，其中，所述无线链路配置信息包括：CA或DC下主小区PCell和辅小区SCell的配置信息。
  4. 根据权利要求3所述的无线链路恢复方法，其中，所述根据无线链路失败或切换失败前的无线链路配置信息，对无线链路失败或切换失败的无线链路进行恢复的步骤，包括：
    根据CA或DC下主小区PCell的配置信息，确定无线链路失败或切换失败的无线链路的主小区PCell；
    根据CA或DC下辅小区SCell的配置信息，确定无线链路失败或切换失败的无线链路的辅小区SCell以及各SCell的状态信息；
    根据所述无线链路的主小区PCell、辅小区SCell以及各SCell的状态信息，对所述无线链路进行恢复。
  5. 根据权利要求4所述的无线链路恢复方法，其中，所述根据所述无线链路的主小区PCell、辅小区SCell以及各SCell的状态信息，对所述无线链路进行恢复的步骤，包括：
    根据所述无线链路的主小区PCell，将所述无线链路的主小区PCell进行 恢复；
    根据所述无线链路的辅小区SCell以及各SCell的状态信息，将所述无线链路的各个辅小区SCell恢复至无线链路失败或切换失败前的状态，或者，将所述无线链路的各个辅小区SCell恢复至预设状态，或者，对所述无线链路的处于激活态的辅小区SCell进行恢复。
  6. 根据权利要求1所述的无线链路恢复方法，其中，所述无线链路配置信息还包括以下信息中的至少一项：物理层配置信息、介质访问控制MAC层配置信息、无线链路控制RLC层配置信息、分组数据汇聚协议PDCP层配置信息和业务数据适配协议SDAP层配置信息。
  7. 根据权利要求1所述的无线链路恢复方法，其中，所述根据无线链路失败或切换失败前的无线链路配置信息，对无线链路失败或切换失败的无线链路进行恢复的步骤之前，还包括：
    若当前位置所属的当前小区为预设小区集合中的一个，则执行根据无线链路失败或切换失败前的无线链路配置信息，对无线链路失败或切换失败的无线链路进行恢复的步骤；
    否则，将无线链路失败或切换失败的无线链路恢复至单载波配置。
  8. 根据权利要求1所述的无线链路恢复方法，其中，所述根据无线链路失败或切换失败前的无线链路配置信息，对无线链路失败或切换失败的无线链路进行恢复的步骤之前，还包括：
    接收当前位置所属的当前小区广播的系统信息；
    根据所述系统信息，检测所述当前小区与无线链路失败或切换失败前所属的服务小区支持的至少部分配置是否一致；
    所述根据无线链路失败或切换失败前的无线链路配置信息，对无线链路失败或切换失败的无线链路进行恢复的步骤，包括：
    若检测到所述当前小区与无线链路失败或切换失败前所属的服务小区支持的部分配置一致，则根据所述无线链路配置信息中一致的部分配置，对无线链路失败或切换失败的无线链路进行恢复；
    若检测到所述当前小区与无线链路失败或切换失败前所属的服务小区支持的全部配置一致，则根据所述无线链路配置信息的全部配置，对无线链路 失败或切换失败的无线链路进行恢复。
  9. 一种终端，包括：
    第一恢复模块，用于根据无线链路失败或切换失败前的无线链路配置信息，对无线链路失败或切换失败的无线链路进行恢复；其中，所述无线链路配置信息包括以下信息中的至少一项：载波聚合CA的配置信息、双连接DC的配置信息和带宽部分BWP的配置信息。
  10. 根据权利要求9所述的终端，还包括：
    获取模块，用于当发生无线链路失败或切换失败时，获取无线链路失败或切换失败前的接入层AS上下文信息；
    确定模块，用于根据所述AS上下文信息，确定无线链路失败或切换失败前的无线链路配置信息。
  11. 根据权利要求9所述的终端，其中，所述无线链路配置信息包括：CA或DC下主小区PCell和辅小区SCell的配置信息。
  12. 根据权利要求11所述的终端，其中，所述第一恢复模块包括：
    第一确定子模块，用于根据CA或DC下主小区PCell的配置信息，确定无线链路失败或切换失败的无线链路的主小区PCell；
    第二确定子模块，用于根据CA或DC下辅小区SCell的配置信息，确定无线链路失败或切换失败的无线链路的辅小区SCell以及各SCell的状态信息；
    第一恢复子模块，用于根据所述无线链路的主小区PCell、辅小区SCell以及各SCell的状态信息，对所述无线链路进行恢复。
  13. 根据权利要求12所述的终端，其中，所述第一恢复子模块包括：
    第一恢复单元，用于根据所述无线链路的主小区PCell，将所述无线链路的主小区PCell进行恢复；
    第二恢复单元，用于根据所述无线链路的辅小区SCell以及各SCell的状态信息，将所述无线链路的各个辅小区SCell恢复至无线链路失败或切换失败前的状态，或者，将所述无线链路的各个辅小区SCell恢复至预设状态，或者，对所述无线链路的处于激活态的辅小区SCell进行恢复。
  14. 根据权利要求9所述的终端，其中，所述无线链路配置信息还包括以下信息中的至少一项：物理层配置信息、介质访问控制MAC层配置信息、 无线链路控制RLC层配置信息、分组数据汇聚协议PDCP层配置信息和业务数据适配协议SDAP层配置信息。
  15. 根据权利要求9所述的终端，还包括：
    第二恢复模块，用于在当前位置所属的当前小区为预设小区集合中的一个时，执行根据无线链路失败或切换失败前的无线链路配置信息，对无线链路失败或切换失败的无线链路进行恢复的步骤；
    第三恢复模块，用于在当前小区不属于预设小区集合时，将无线链路失败或切换失败的无线链路恢复至单载波配置。
  16. 根据权利要求9所述的终端，还包括：
    接收模块，用于接收当前位置所属的当前小区广播的系统信息；
    检测模块，用于根据所述系统信息，检测所述当前小区与无线链路失败或切换失败前所属的服务小区支持的至少部分配置是否一致；
    所述第一恢复模块还包括：
    第二恢复子模块，用于当检测到所述当前小区与无线链路失败或切换失败前所属的服务小区支持的部分配置一致时，根据所述无线链路配置信息中一致的部分配置，对无线链路失败或切换失败的无线链路进行恢复；
    第三恢复子模块，用于当检测到所述当前小区与无线链路失败或切换失败前所属的服务小区支持的全部配置一致，根据所述无线链路配置信息的全部配置，对无线链路失败或切换失败的无线链路进行恢复。
  17. 一种终端，包括处理器、存储器以及存储于所述存储器上并可在所述处理器上运行的程序，其中，所述程序被所述处理器执行时实现如权利要求1至8中任一项所述的无线链路恢复方法的步骤。
  18. 一种计算机可读存储介质，其中，所述计算机可读存储介质上存储有程序，所述程序被处理器执行时实现如权利要求1至8中任一项所述的无线链路恢复方法的步骤。
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