CN112272926B

CN112272926B - Link recovery method and device and communication equipment

Info

Publication number: CN112272926B
Application number: CN201880092406.3A
Authority: CN
Inventors: 尤心; 史志华
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2018-09-27
Filing date: 2018-09-27
Publication date: 2023-06-02
Anticipated expiration: 2038-09-27
Also published as: WO2020061869A1; CN112272926A; TW202021301A

Abstract

The embodiment of the application provides a link recovery method and device, and communication equipment, comprising the following steps: the first cell performs a link recovery procedure for recovering the target link of the second cell.

Description

Link recovery method and device and communication equipment

Technical Field

The embodiment of the application relates to the technical field of mobile communication, in particular to a link recovery method and device and communication equipment.

Background

In New air interface (NR, new Radio) version 15 (Rel-15), a beam failure recovery (BFR, beam Failure Recovery) procedure (or Link recovery) procedure) is defined. However, in the design of Rel-15, only the beam failure recovery procedure on the primary and Secondary cells (PSCell, primary Secondary Cell) is considered, and the beam failure recovery procedure on the Secondary Cell (SCell) is not considered, so once the beam failure (or link failure) occurs on the SCell, how to perform the beam failure recovery (or link recovery) on the SCell is a problem to be solved.

Disclosure of Invention

The embodiment of the application provides a link recovery method and device and communication equipment.

The link recovery method provided by the embodiment of the application comprises the following steps:

the first cell performs a link recovery procedure for recovering the target link of the second cell.

The link recovery device provided by the embodiment of the application is applied to a first cell, and the device comprises:

and the link recovery unit is used for executing a link recovery process, wherein the link recovery process is used for recovering the target link of the second cell.

The communication device provided by the embodiment of the application comprises a processor and a memory. The memory is used for storing a computer program, and the processor is used for calling and running the computer program stored in the memory to execute the link recovery method.

The network device provided by the embodiment of the application comprises a processor and a memory. The memory is used for storing a computer program, and the processor is used for calling and running the computer program stored in the memory to execute the link recovery method.

The chip provided by the embodiment of the application is used for realizing the link recovery method.

Specifically, the chip includes: and a processor for calling and running the computer program from the memory, so that the device mounted with the chip executes the link recovery method.

The computer readable storage medium provided in the embodiments of the present application is used for storing a computer program, where the computer program makes a computer execute the above-mentioned link recovery method.

The computer program product provided by the embodiment of the application comprises computer program instructions, wherein the computer program instructions enable a computer to execute the link recovery method.

The computer program provided in the embodiments of the present application, when executed on a computer, causes the computer to perform the above-described link recovery method.

By the technical scheme, it is clear how to return from the second cell (such as the SCell) to the first cell (such as the PScell) to perform link recovery for the second cell (such as the SCell), and further, it is clear how the first cell (such as the PScell) performs link recovery for the second cell (such as the SCell), so that the effectiveness of the downlink is ensured.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application. In the drawings:

fig. 1 is a schematic diagram of a communication system architecture provided in an embodiment of the present application;

Fig. 2 is a flow chart of a link recovery method according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of a link recovery device according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of a communication device provided in an embodiment of the present application;

FIG. 5 is a schematic block diagram of a chip of an embodiment of the present application;

fig. 6 is a schematic block diagram of a communication system provided in an embodiment of the present application.

Detailed Description

The following description of the technical solutions in the embodiments of the present application will be made with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

The technical solution of the embodiment of the application can be applied to various communication systems, for example: global system for mobile communications (Global System of Mobile communication, GSM), code division multiple access (Code Division Multiple Access, CDMA), wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA) systems, general packet radio service (General Packet Radio Service, GPRS), long term evolution (Long Term Evolution, LTE) systems, LTE frequency division duplex (Frequency Division Duplex, FDD) systems, LTE time division duplex (Time Division Duplex, TDD), universal mobile telecommunications system (Universal Mobile Telecommunication System, UMTS), worldwide interoperability for microwave access (Worldwide Interoperability for Microwave Access, wiMAX) communication systems, or 5G systems, and the like.

Exemplary, a communication system 100 to which embodiments of the present application apply is shown in fig. 1. The communication system 100 may include a network device 110, and the network device 110 may be a device that communicates with a terminal 120 (or referred to as a communication terminal, terminal). Network device 110 may provide communication coverage for a particular geographic area and may communicate with terminals located within the coverage area. Alternatively, the network device 110 may be a base station (Base Transceiver Station, BTS) in a GSM system or a CDMA system, a base station (NodeB, NB) in a WCDMA system, an evolved base station (Evolutional Node B, eNB or eNodeB) in an LTE system, or a radio controller in a cloud radio access network (Cloud Radio Access Network, CRAN), or the network device may be a mobile switching center, a relay station, an access point, a vehicle device, a wearable device, a hub, a switch, a bridge, a router, a network-side device in a 5G network, or a network device in a future evolved public land mobile network (Public Land Mobile Network, PLMN), etc.

The communication system 100 further includes at least one terminal 120 located within the coverage area of the network device 110. "terminal" as used herein includes, but is not limited to, connection via wireline, such as via public-switched telephone network (Public Switched Telephone Networks, PSTN), digital subscriber line (Digital Subscriber Line, DSL), digital cable, direct cable connection; and/or another data connection/network; and/or via a wireless interface, e.g., for a cellular network, a wireless local area network (Wireless Local Area Network, WLAN), a digital television network such as a DVB-H network, a satellite network, an AM-FM broadcast transmitter; and/or means of the other terminal arranged to receive/transmit communication signals; and/or internet of things (Internet of Things, ioT) devices. Terminals arranged to communicate over a wireless interface may be referred to as "wireless communication terminals", "wireless terminals" or "mobile terminals". Examples of mobile terminals include, but are not limited to, satellites or cellular telephones; a personal communications system (Personal Communications System, PCS) terminal that may combine a cellular radiotelephone with data processing, facsimile and data communications capabilities; a PDA that can include a radiotelephone, pager, internet/intranet access, web browser, organizer, calendar, and/or a global positioning system (Global Positioning System, GPS) receiver; and conventional laptop and/or palmtop receivers or other electronic devices that include a radiotelephone transceiver. A terminal may refer to an access terminal, user Equipment (UE), subscriber unit, subscriber station, mobile station, remote terminal, mobile device, user terminal, wireless communication device, user agent, or User Equipment. An access terminal may be a cellular telephone, a cordless telephone, a session initiation protocol (Session Initiation Protocol, SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, a personal digital assistant (Personal Digital Assistant, PDA), a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, a terminal in a 5G network or a terminal in a future evolved PLMN, etc.

Alternatively, direct to Device (D2D) communication may be performed between the terminals 120.

Alternatively, the 5G system or 5G network may also be referred to as a New Radio (NR) system or NR network.

Fig. 1 illustrates one network device and two terminals, alternatively, the communication system 100 may include multiple network devices and each network device may include other numbers of terminals within a coverage area, which is not limited in this embodiment.

Optionally, the communication system 100 may further include a network controller, a mobility management entity, and other network entities, which are not limited in this embodiment of the present application.

It should be understood that a device having a communication function in a network/system in an embodiment of the present application may be referred to as a communication device. Taking the communication system 100 shown in fig. 1 as an example, the communication device may include a network device 110 and a terminal 120 with communication functions, where the network device 110 and the terminal 120 may be specific devices described above, and are not described herein again; the communication device may also include other devices in the communication system 100, such as a network controller, a mobility management entity, and other network entities, which are not limited in this embodiment of the present application.

It should be understood that the terms "system" and "network" are used interchangeably herein. The term "and/or" is herein merely an association relationship describing an associated object, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

In order to facilitate understanding of the technical solutions of the embodiments of the present application, the following describes related technologies related to the embodiments of the present application.

For a dual connectivity (DC, dual Connectivity) system, there is a Primary Cell group (MCG, master Cell Group) and a secondary Cell group (SCG, secondary Cell Group) serving a terminal, where the MCG includes a Primary Cell (PCell) and an SCell, and the SCG includes a PSCell and an SCell. Here, PCell refers to a primary cell in MCG, and PSCell refers to a primary cell in SCG. PCell and PSCell may be collectively referred to as a private Cell (SpCell).

In Rel-15, the BFR process of SpCell is specified, comprising the steps of:

1) Beam failure detection (Beam failure detection)

Here, beam failure detection is determined by receiving a beam failure event (Beam failure instance) reported by the physical layer and maintaining a counter.

2) New candidate beam selection (New candidate beam identification)

The UE selects a new beam (beam) meeting a predetermined/configuration threshold based on the measurement results of the CSI-RS and/or SSB.

Here, the measurement result may be at least one of reference signal received power (L1-RSRP, layer1-Reference Signal Receiving Power) of the physical Layer, reference signal received quality (L1-RSRQ, layer1-Reference Signal Receiving Quality) of the physical Layer, and signal to interference plus noise ratio (L1-SINR, layer1-Signal to Interference plus Noise Ratio) of the physical Layer.

2.1 If a new beam is selected that meets the predetermined/configuration threshold, then step 3) is performed;

2.2 If a new beam meeting the predetermined/configuration threshold is not selected, a contended random access (content-based Random Access) procedure is employed.

3) Beam failure recovery request transmission (Beam failure recovery request transmission)

The UE selects a new beam-corresponding physical random access channel (PRACH, physical Random Access Channel) to transmit to the network or reports its selected new beam over a physical uplink control channel (PUCCH, physical Uplink Control Channel).

4) UE detects network response

It should be noted that, depending on the specific configuration of the network, the UE may repeatedly perform steps 2) to 4) above.

The presence or absence of beam failure (beam failure) can be determined by the step 1), wherein the beam failure is determined for the quality of the beam associated with the PDCCH, and the quality of the beam is determined by the reference signal corresponding to the beam, and the reference signal includes CSI-RS and/or SSB, for example.

In the above step 3), the UE tells the base station which downlink beam to use for transmitting the random access response (RAR, random Access Response) by means of random access to recover the downlink beam. It should be clear that the preamble (preamble) is configured with the SSB as granularity, based on which the UE first selects the SSB and/or CSI-RS (here, the SSB and the CSI-RS have a correspondence relationship) that satisfy the predetermined/configured threshold, and uses the preamble corresponding to the SSB and the PRACH resource to send MSG1, that is, after the gcb receives the preamble, it is known which beam corresponding to the SSB is used to feed back the RAR. The following describes a BFR-based random access procedure, in which CFRA BFR refers to BFR-based non-contention random access (CFRA, contention Free Random Access), CBRA BFR refers to BFR-based contention random access (CBRA, contention Based Random Access).

1. Cfraffr: the radio resource control (RRC, radio Resource Control) configures CFRA resources (i.e., proprietary PRACH resources) associated with SSBs, which are used for BFRs and have SSBs that meet a threshold.

2. Fall back of CFRA BFR to CBRA BFR (CBRA BFR fallback from CFRA BFR), including the following two cases:

2.1 RRC configures CFRA resources (i.e., proprietary PRACH resources) associated with SSBs that are used for BFR but not SSBs that meet a threshold value;

2.2 A beam failure recovery timer (Beam failure recovery Timer) times out and the UE can only use CBRA BFR.

3. CBRABFR: the RRC does not configure beam failure recovery configuration information (beamfailurereconveryconfig) and the UE can only use CBRABFR.

For one medium access control (MAC, media Access Control) entity:

-whenever the physical layer reports a beam failure event (beam failure instance), the UE will increment the counter BFLCOUNTER by 1 and restart the beam failure detection timer (beamfailuredetection timer);

-if bfi_counter reaches a maximum during the beamfailure detection timer run, beam failure is considered and a random access procedure is initiated;

for CFRA BFR, the base station network configures beamFailureRecoveryConfigIE, UE for random access using the parameters in the IE;

For CBRA BFR, if beamFailureRecoveryConfig is configured, then random access is performed using powerRampingStep, preambleReceivedTargetPower, preambleTransMax configured in the IE; if not, common RACH procedure is used;

-if the random access procedure is successful, the BFR procedure is considered to be successful.

Fig. 2 is a flow chart of a link recovery method provided in an embodiment of the present application, as shown in fig. 2, where the link recovery method includes the following steps:

step 201: the first cell performs a link recovery procedure for recovering the target link of the second cell.

In this embodiment of the present application, the first cell refers to a PCell or a PSCell, the second cell refers to an SCell, taking a DC scenario as an example, in MCG, the first cell refers to a PCell, the second cell refers to an SCell, in SCG, the first cell refers to a PSCell, and the second cell refers to an SCell. Here, PCell refers to a primary cell in MCG, and PSCell refers to a primary cell in SCG. PCell and PSCell may be collectively referred to as SpCell.

In the embodiment of the application, the second cell may perform link recovery (also called BFR) by backing off to the first cell. Wherein the first cell performs a link recovery procedure if at least one of the following conditions is met:

The second cell is configured with a second PRACH resource, and SSB and/or reference signals associated with the second PRACH resource do not meet a first threshold value;

the second cell is not configured with a second PRACH resource, and the second cell has a link failure;

the second cell is configured with a second PRACH resource, and the random access failure times for link recovery in the second cell exceed a second threshold value;

the second cell is configured with a second PRACH resource, and a first timer for link recovery on the second cell is overtime;

the second cell is configured with a second PRACH resource, and the random access process for link recovery on the second cell fails;

wherein the second PRACH resource is used for a non-contention random access procedure.

In the above solution, the reference signal may be a CSI-RS, where the CSI-RS and the SSB have a corresponding relationship, and further, the network side uses the SSB as granularity, configures one or more preambles for access by the UE, and the network side may further configure a second PRACH resource associated with the SSB, where the second PRACH resource is used in a non-contention random access process, and therefore, the second PRACH resource may be called a CFRA resource. In addition, the network side configures a first PRACH resource associated with the SSB, where the first PRACH resource is used for a contention random access procedure, and therefore, the first PRACH resource may be called a CBRA resource. It should be clear that the network side may only configure CBRA resources and not configure CFRA resources. Alternatively, the network side may configure both CBRA resources and CFRA resources.

In this embodiment of the present application, a second PRACH resource (i.e., CFRA resource) is used for a link recovery (i.e., BFR) procedure, where the second cell is configured with the second PRACH resource, the second cell may use the CFRA resource to perform link recovery, however, in the following cases, the second cell needs to fall back to the first cell to perform the link recovery procedure:

1) If the second cell configures a second PRACH resource, but SSB and/or CSI-RS associated with the second PRACH resource do not meet a first threshold value, the second cell is retracted to the first cell to execute a link recovery process;

2) If the second cell is not configured with a second PRACH resource and the second cell has a link failure, the second cell is backed back to the first cell to execute a link recovery process;

3) If the second cell is configured with a second PRACH resource and the random access failure frequency of the second cell for link recovery exceeds a second threshold value, the second cell is retracted to the first cell to execute a link recovery process;

4) If the second cell configures a second PRACH resource and a first timer (beameFailureRecoveryTimer) for link recovery on the second cell is overtime, the second cell rolls back to the first cell to execute a link recovery process;

5) And if the second cell is configured with a second PRACH resource and the random access process for link recovery on the second cell fails, the second cell is backed off to the first cell to execute the link recovery process.

In the above solution, the first threshold value, the second threshold value, and the duration of the first timer may be configured by a network, or preconfigured, or agreed by a protocol.

When one or more of the above 1) to 5) is satisfied, the second cell backs to the first cell to perform a link recovery procedure.

In this embodiment of the present application, the link recovery process executed by the first cell may be implemented in the following ways:

mode one: the first cell determines a first signal corresponding to the second cell, the first cell informs a first node of the first signal corresponding to the second cell based on a contention-based random access process, and the first signal is used for the first node to recover a target link of the second cell.

Further, the first cell transmits MSG1 associated with the first signal on a first PRACH resource to the first node, the first signal being for the first node to transmit MSG2 associated with the first signal; wherein the first PRACH resource is used for a contention random access procedure.

Here, the first signal refers to SSB and/or CSI-RS, and the first signal for determining that the second cell corresponds to the first signal refers to index (index) information for determining that the second cell corresponds to SSB and/or CSI-RS.

Here, the first node is a base station, for example, a gNB in 5G, or an eNB in 4G.

Based on the above, after the first cell determines SSB and/or CSI-RS index information of the second cell, based on the SSB and/or CSI-RS index information, the first cell determines the pre-and CBRA resources associated with the SSB and/or CSI-RS index information, and sends the pre-to the base station on the CBRA resources (i.e. sends MSG 1).

Then, after receiving the MSG1, the base station may determine the associated SSB and/or CSI-RS index information from the pre, and send a PDCCH based on the SSB and/or CSI-RS index information, where DCI in the PDCCH is used to schedule the PDSCH for transmitting the RAR, and if the PDCCH is successfully received, the first cell and/or the second cell receives the PDCCH sent by the base station, and if the PDCCH is successfully received, it indicates that the link reply is successful (i.e., the BFR is successful), and the first cell and/or the second cell receive the RAR from the PDSCH based on the scheduling of the PDCCH.

Mode two: the first cell determines a first signal corresponding to the second cell, the first cell informs a first node of the first signal corresponding to the second cell based on a non-contention random access process, and the first signal is used for the first node to recover a target link of the second cell.

Further, the first cell transmits MSG1 associated with the first signal on a second PRACH resource to the first node, the first signal being for the first node to transmit MSG2 associated with the first signal; wherein the second PRACH resource is used for a non-contention random access procedure.

The second mode is the same as the first mode, except that the second mode initiates MSG1 based on a second PRACH resource (i.e., CFRA resource), and it should be noted that the link recovery procedure can be implemented using the second mode only when the CFRA resource is configured on the first cell.

Mode three: the first cell determines a first signal corresponding to the second cell, and the first cell informs a first node of the first signal corresponding to the second cell through a media access control unit (MAC CE, media Access Control Control Element), wherein the first signal is used for the first node to recover a target link of the second cell.

Mode four: the first cell determines a first signal corresponding to the second cell, the first cell informs a first node of the first signal corresponding to the second cell through uplink control signaling, and the first signal is used for the first node to recover a target link of the second cell.

Here, the uplink control signaling is carried in the PUCCH, and the uplink control signaling is, for example, scheduling request (SR, scheduling Request) signaling.

Optionally, when the first cell notifies the first node of the first signal corresponding to the second cell, the first node is also notified that the role of the first signal is to restore the target link of the second cell. In this way, the base station side can distinguish whether the SSB and/or CSI-RS index information reported by the first cell is for link recovery of the second cell or for link recovery of the first cell.

In this embodiment of the present application, the determining, by the first cell, the first signal corresponding to the second cell may be implemented by:

mode one: the first cell and the second cell belong to the same frequency band

The first cell takes a first signal corresponding to the first cell as a first signal corresponding to the second cell; or alternatively, the process may be performed,

the first cell determines a first signal corresponding to the second cell based on measurement results of SSB and/or reference signals.

Here, if the first cell and the second cell belong to the same frequency band (band), SSB and/or CSI-RS index information corresponding to the first cell and the second cell are the same, in other words, beam index corresponding to the first cell and the second cell are the same. In this case, the first cell may report SSB and/or CSI-RS index information on which it is currently camping to the base station. Or, the first cell selects SSB and/or CSI-RS with the measurement result meeting the threshold by measuring the SSB and/or the CSI-RS, and reports index information of the SSB and/or the CSI-RS with the measurement result meeting the threshold to the base station. Here, the measurement result may be at least one of L1-RSRP, L1-RSRQ, and L1-SINR.

Mode two: the first cell receives first indication information sent by a second cell, wherein the first indication information is used for indicating the second cell to determine a first signal corresponding to the second cell based on a measurement result of SSB and/or a reference signal.

Here, the second cell measures the SSB and/or the CSI-RS by itself, selects the SSB and/or the CSI-RS whose measurement results meet the threshold, reports index information of the SSB and/or the CSI-RS meeting the threshold to the first cell, and reports index information of the SSB and/or the CSI-RS to the base station through the first cell.

In the above scheme, there may be one index information or a plurality of index information of SSB and/or CSI-RS satisfying the threshold, and when there is a plurality of index information of SSB and/or CSI-RS satisfying the threshold, the first cell may select to report index information of SSB and/or CSI-RS with the best quality, or report all index information of SSB and/or CSI-RS satisfying the threshold.

Fig. 3 is a schematic structural diagram of a link recovery device according to an embodiment of the present application, which is applied to a first cell, as shown in fig. 3, where the device includes:

and a link recovery unit 30, configured to perform a link recovery procedure, where the link recovery procedure is used to recover the target link of the second cell.

In one embodiment, the link recovery unit 30 includes:

a determining subunit 301, configured to determine a first signal corresponding to the second cell;

a notification subunit 302, configured to notify, to a first node, a first signal corresponding to the second cell, where the first signal is used for the first node to recover a target link of the second cell.

In an embodiment, the notification subunit 302 is configured to send, to the first node, an MSG1 associated with the first signal on a first PRACH resource, where the first signal is used for the first node to send an MSG2 associated with the first signal;

wherein the first PRACH resource is used for a contention random access procedure.

In one embodiment, the link recovery unit 30 includes:

a notification subunit 302, configured to notify, to a first node, a first signal corresponding to the second cell, where the first signal is used for the first node to recover a target link of the second cell, based on a non-contention random access procedure.

In an embodiment, the notification subunit 302 is configured to send, to the first node, an MSG1 associated with the first signal on a second PRACH resource, where the first signal is used for the first node to send an MSG2 associated with the first signal;

In one embodiment, the link recovery unit 30 includes:

a notification subunit 302, configured to notify, through a MAC CE, a first node of a first signal corresponding to the second cell, where the first signal is used for the first node to recover a target link of the second cell.

In one embodiment, the link recovery unit includes:

a notification subunit 302, configured to notify, through an uplink control signaling, a first node of a first signal corresponding to the second cell, where the first signal is used for the first node to recover a target link of the second cell.

In an embodiment, the notifying subunit 302 is configured to notify, when notifying the first node of the first signal corresponding to the second cell, that the role of the first signal is to restore the target link of the second cell to the first node.

In an embodiment, the determining subunit 301 is configured to use the first signal corresponding to the first cell as the first signal corresponding to the second cell; or determining a first signal corresponding to the second cell based on measurement results of the SSB and/or the reference signal;

Wherein the first cell and the second cell belong to the same frequency band.

In an embodiment, the determining subunit 301 is configured to receive first indication information sent by a second cell, where the first indication information is used to indicate that the second cell determines a first signal corresponding to the second cell based on a measurement result of an SSB and/or a reference signal.

In an embodiment, the link recovery unit 30 performs a link recovery process in case at least one of the following conditions is satisfied:

Those skilled in the art will appreciate that the above description of the link recovery apparatus of the embodiments of the present application may be understood with reference to the description of the link recovery method of the embodiments of the present application.

Fig. 4 is a schematic structural diagram of a communication device 600 provided in an embodiment of the present application. The communication device may be a terminal or a network device, and the communication device 600 shown in fig. 4 includes a processor 610, where the processor 610 may call and execute a computer program from a memory to implement the methods in the embodiments of the present application.

Optionally, as shown in fig. 4, the communication device 600 may further comprise a memory 620. Wherein the processor 610 may call and run a computer program from the memory 620 to implement the methods in embodiments of the present application.

The memory 620 may be a separate device from the processor 610 or may be integrated into the processor 610.

Optionally, as shown in fig. 4, the communication device 600 may further include a transceiver 630, and the processor 610 may control the transceiver 630 to communicate with other devices, and in particular, may send information or data to other devices, or receive information or data sent by other devices.

The transceiver 630 may include a transmitter and a receiver, among others. Transceiver 630 may further include antennas, the number of which may be one or more.

Optionally, the communication device 600 may be specifically a network device in the embodiment of the present application, and the communication device 600 may implement a corresponding flow implemented by the network device in each method in the embodiment of the present application, which is not described herein for brevity.

Optionally, the communication device 600 may be specifically a mobile terminal/terminal in the embodiment of the present application, and the communication device 600 may implement a corresponding flow implemented by the mobile terminal/terminal in each method in the embodiment of the present application, which is not described herein for brevity.

Fig. 5 is a schematic structural diagram of a chip of an embodiment of the present application. The chip 700 shown in fig. 5 includes a processor 710, and the processor 710 may call and run a computer program from a memory to implement the methods in the embodiments of the present application.

Optionally, as shown in fig. 5, chip 700 may also include memory 720. Wherein the processor 710 may call and run a computer program from the memory 720 to implement the methods in embodiments of the present application.

Wherein the memory 720 may be a separate device from the processor 710 or may be integrated into the processor 710.

Optionally, the chip 700 may also include an input interface 730. The processor 710 may control the input interface 730 to communicate with other devices or chips, and in particular, may obtain information or data sent by other devices or chips.

Optionally, the chip 700 may further include an output interface 740. The processor 710 may control the output interface 740 to communicate with other devices or chips, and in particular, may output information or data to other devices or chips.

Optionally, the chip may be applied to a network device in the embodiment of the present application, and the chip may implement a corresponding flow implemented by the network device in each method in the embodiment of the present application, which is not described herein for brevity.

Optionally, the chip may be applied to a mobile terminal/terminal in the embodiments of the present application, and the chip may implement a corresponding flow implemented by the mobile terminal/terminal in each method in the embodiments of the present application, which is not described herein for brevity.

It should be understood that the chips referred to in the embodiments of the present application may also be referred to as system-on-chip chips, or the like.

Fig. 6 is a schematic block diagram of a communication system 900 provided in an embodiment of the present application. As shown in fig. 6, the communication system 900 includes a terminal 910 and a network device 920.

The terminal 910 may be configured to implement the corresponding functions implemented by the terminal in the above method, and the network device 920 may be configured to implement the corresponding functions implemented by the network device in the above method, which are not described herein for brevity.

It should be appreciated that the processor of an embodiment of the present application may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method embodiments may be implemented by integrated logic circuits of hardware in a processor or instructions in software form. The processor may be a general purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), an off-the-shelf programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components. The disclosed methods, steps, and logic blocks in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present application may be embodied directly in hardware, in a decoded processor, or in a combination of hardware and software modules in a decoded processor. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in a memory, and the processor reads the information in the memory and, in combination with its hardware, performs the steps of the above method.

It will be appreciated that the memory in embodiments of the present application may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The nonvolatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable EPROM (EEPROM), or a flash Memory. The volatile memory may be random access memory (Random Access Memory, RAM) which acts as an external cache. By way of example, and not limitation, many forms of RAM are available, such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (Double Data Rate SDRAM), enhanced SDRAM (ESDRAM), synchronous DRAM (SLDRAM), and Direct RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

It should be understood that the above memory is exemplary but not limiting, and for example, the memory in the embodiments of the present application may be Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), direct RAM (DR RAM), and the like. That is, the memory in embodiments of the present application is intended to comprise, without being limited to, these and any other suitable types of memory.

Embodiments of the present application also provide a computer-readable storage medium for storing a computer program.

Optionally, the computer readable storage medium may be applied to a network device in the embodiments of the present application, and the computer program causes a computer to execute a corresponding flow implemented by the network device in each method in the embodiments of the present application, which is not described herein for brevity.

Optionally, the computer readable storage medium may be applied to a mobile terminal/terminal in the embodiments of the present application, and the computer program causes a computer to execute a corresponding procedure implemented by the mobile terminal/terminal in each method of the embodiments of the present application, which is not described herein for brevity.

Embodiments of the present application also provide a computer program product comprising computer program instructions.

Optionally, the computer program product may be applied to a network device in the embodiments of the present application, and the computer program instructions cause the computer to execute corresponding flows implemented by the network device in the methods in the embodiments of the present application, which are not described herein for brevity.

Optionally, the computer program product may be applied to a mobile terminal/terminal in the embodiments of the present application, and the computer program instructions cause the computer to execute corresponding processes implemented by the mobile terminal/terminal in the methods in the embodiments of the present application, which are not described herein for brevity.

The embodiment of the application also provides a computer program.

Optionally, the computer program may be applied to a network device in the embodiments of the present application, and when the computer program runs on a computer, the computer is caused to execute a corresponding flow implemented by the network device in each method in the embodiments of the present application, which is not described herein for brevity.

Optionally, the computer program may be applied to a mobile terminal/terminal in the embodiments of the present application, where the computer program when run on a computer causes the computer to execute corresponding processes implemented by the mobile terminal/terminal in the methods in the embodiments of the present application, and for brevity, will not be described in detail herein.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of 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.

In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a usb disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method of link recovery, the method comprising:

the first cell determines a first signal corresponding to the second cell;

the first cell informs a first node of a first signal corresponding to the second cell, wherein the first signal is used for the first node to recover a target link of the second cell through a random access process; if the second cell successfully receives a Physical Downlink Control Channel (PDCCH) sent based on the first signal, indicating that the link recovery is successful, wherein the PDCCH is used for scheduling a Random Access Response (RAR);

wherein, the first signal refers to a synchronization signal block SSB and/or a channel state information reference signal CSI-RS.

2. The method of claim 1, wherein the first cell informs a first node of a first signal corresponding to the second cell, comprising:

The first cell transmits MSG1 associated with the first signal to the first node on a first physical random access channel PRACH resource, wherein the first signal is used for the first node to transmit MSG2 associated with the first signal;

3. The method of claim 1, wherein the first cell informs a first node of a first signal corresponding to the second cell, comprising:

the first cell transmitting MSG1 associated with the first signal on a second PRACH resource to the first node, the first signal being for the first node to transmit MSG2 associated with the first signal;

4. The method of claim 1, wherein the first cell informs a first node of a first signal corresponding to the second cell, comprising:

the first cell informs the first node of a first signal corresponding to the second cell through a Media Access Control (MAC) CE or an uplink control signaling.

5. The method according to any one of claims 1 to 4, wherein when the first cell informs the first node of a first signal corresponding to the second cell, the first node is further informed that the role of the first signal is to restore a target link of the second cell.

6. The method of any of claims 1 to 4, wherein the first cell determining a first signal corresponding to the second cell comprises:

the first cell determines a first signal corresponding to the second cell based on a measurement result of the synchronous signal block SSB and/or the reference signal; or alternatively, the process may be performed,

the first cell receives first indication information sent by a second cell, wherein the first indication information is used for indicating the second cell to determine a first signal corresponding to the second cell based on a measurement result of SSB and/or a reference signal.

7. The method according to any of claims 1 to 4, wherein the first cell performs a link recovery procedure if at least one of the following conditions is met:

8. A link recovery apparatus for use in a first cell, the apparatus comprising: a link recovery unit, wherein the link recovery unit includes:

a determining subunit, configured to determine a first signal corresponding to the second cell;

a notification subunit, configured to notify a first node of a first signal corresponding to the second cell, where the first signal is used for the first node to recover a target link of the second cell through a random access procedure; if the second cell successfully receives the PDCCH sent based on the first signal, indicating that the link recovery is successful, wherein the PDCCH is used for scheduling RAR;

wherein, the first signal refers to SSB and/or CSI-RS.

9. The apparatus of claim 8, wherein the notification subunit is configured to send MSG1 associated with the first signal on a first PRACH resource to the first node, the first signal being for the first node to send MSG2 associated with the first signal;

10. The apparatus of claim 8, wherein the notification subunit is configured to send MSG1 associated with the first signal to the first node on a second PRACH resource, the first signal being for the first node to send MSG2 associated with the first signal;

11. The apparatus of claim 8, wherein the notification subunit is configured to notify, to a first node, a first signal corresponding to the second cell through MAC CE or uplink control signaling, the first signal being used by the first node to recover a target link of the second cell.

12. The apparatus according to any one of claims 8 to 11, wherein the notifying subunit is configured to, when notifying the first node of the first signal corresponding to the second cell, also notify the first node that the role of the first signal is to restore the target link of the second cell.

13. The apparatus according to any one of claims 8 to 11, wherein the determining subunit is configured to take, as the first signal corresponding to the second cell, the first signal corresponding to the first cell; or determining a first signal corresponding to the second cell based on measurement results of the SSB and/or the reference signal; or, receiving first indication information sent by a second cell, where the first indication information is used to indicate the second cell to determine a first signal corresponding to the second cell based on a measurement result of an SSB and/or a reference signal.

14. The apparatus according to any one of claims 8 to 11, wherein the link recovery unit performs a link recovery procedure if at least one of the following conditions is met:

15. A communication device, comprising: a processor and a memory for storing a computer program, the processor being adapted to invoke and run the computer program stored in the memory for performing the method according to any of claims 1 to 7.

16. A chip, comprising: a processor for calling and running a computer program from a memory, causing a device on which the chip is mounted to perform the method of any one of claims 1 to 7.

17. A computer readable storage medium storing a computer program for causing a computer to perform the method of any one of claims 1 to 7.