CN113225839B

CN113225839B - Wireless link recovery method and device

Info

Publication number: CN113225839B
Application number: CN202010072799.0A
Authority: CN
Inventors: 王振; 刘思綦; 孙鹏; 杨晓东; 纪子超
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2020-01-21
Filing date: 2020-01-21
Publication date: 2023-06-30
Anticipated expiration: 2040-01-21
Also published as: WO2021147822A1; CN113225839A

Abstract

The embodiment of the invention discloses a wireless link recovery method and equipment, which relate to the technical field of communication and are used for solving the problem that wireless link recovery cannot be realized rapidly if BF or RLF occurs in a main cell or BF or RLF occurs in a secondary cell under the condition that the secondary cell schedules the main cell. The method comprises the following steps: if a target event occurs in a first cell of the UE, sending a radio link recovery request of the first cell to network equipment on a second cell of the UE; wherein the first cell comprises at least one of: a primary cell, a first secondary cell; the second cell comprises at least one of: the primary cell, the first secondary cell, the second secondary cell; the first auxiliary cell is an auxiliary cell for scheduling the main cell; the second auxiliary cell is an auxiliary cell except the first auxiliary cell in the auxiliary cells of the UE; the target event is a beam failure BF or a radio link failure RLF.

Description

Wireless link recovery method and device

Technical Field

The embodiment of the invention relates to the technical field of communication, in particular to a wireless link recovery method and device.

Background

When a Beam Failure (BF) or a radio link failure (Radio link Failure, RLF) occurs in the primary cell or the secondary cell, the UE triggers a radio link reestablishment procedure.

Taking BF as an example, in the related art, in the case of scheduling a secondary cell or self-scheduling of the primary cell or self-scheduling of the secondary cell, a beam failure recovery (beam failure recovery, BFR) procedure of the primary cell is introduced to implement beam failure recovery of the primary cell, and a beam failure recovery procedure of the secondary cell is introduced to implement beam failure recovery on the secondary cell. Whether the beam failure recovery flow of the primary cell or the beam failure recovery flow of the secondary cell, the UE first initiates a recovery request, and the network device performs a beam failure recovery response through the PDCCH.

For beam failure of the secondary cell, the base station needs to schedule uplink resources for the user to transmit the BFR MAC CE through the PDCCH first, however, before the base station receives the BFR MAC CE, the base station cannot determine which secondary cell has BF. In the case of secondary cell scheduling primary cell, once secondary cell BF occurs, the base station cannot determine whether BF has occurred in the secondary cell of the scheduling primary cell and thus cannot guarantee that BFR MAC CE is scheduled in the appropriate cell, and if BF has occurred in the primary cell, the corresponding PDCCH cannot be normally sent, so that the primary cell or the secondary cell cannot recover the beam failure according to the beam failure recovery flow under the condition that the primary cell schedules the secondary cell or the primary cell self-schedules or the secondary cell self-schedules.

Thus, if BF or RLF occurs in the primary cell or if BF or RLF occurs in the secondary cell, wireless link recovery cannot be quickly achieved.

Disclosure of Invention

The embodiment of the invention provides a wireless link recovery method and device, which are used for solving the problem that wireless link recovery cannot be realized rapidly if BF or RLF occurs in a primary cell or BF or RLF occurs in a secondary cell under the condition that the secondary cell schedules the primary cell.

In order to solve the technical problems, the invention is realized as follows:

in a first aspect, an embodiment of the present invention provides a radio link recovery method, applied to a UE, where the method includes: if a target event occurs in a first cell of the UE, sending a radio link recovery request of the first cell to network equipment on a second cell of the UE; wherein the first cell comprises at least one of: a primary cell, a first secondary cell; the second cell comprises at least one of: the primary cell, the first secondary cell, the second secondary cell; the first auxiliary cell is an auxiliary cell for scheduling the main cell; the second auxiliary cell is an auxiliary cell except the first auxiliary cell in the auxiliary cells of the UE; the target event is a beam failure BF or a radio link failure RLF.

In a second aspect, an embodiment of the present invention provides a radio link recovery method, applied to a network device, where the method includes: receiving, on a second cell of the UE, a radio link recovery request from the UE for a first cell of the UE; the wireless link recovery request of the first cell is used for indicating the first cell to generate a target event; the first cell comprises at least one of: a primary cell, a first secondary cell; the second cell comprises at least one of: the primary cell, the first secondary cell, the second secondary cell; the first auxiliary cell is an auxiliary cell for scheduling the main cell; the second auxiliary cell is an auxiliary cell except the first auxiliary cell in the auxiliary cells of the UE; the target event is a beam failure BF or a radio link failure RLF.

In a third aspect, an embodiment of the present invention provides a UE, including: a transmitting module; the sending module is configured to send, to the network device, a radio link recovery request of a first cell on a second cell of the UE if the first cell of the UE has a target event; wherein the first cell comprises at least one of: a primary cell, a first secondary cell; the second cell comprises at least one of: the primary cell, the first secondary cell, the second secondary cell; the first auxiliary cell is an auxiliary cell for scheduling the main cell; the second auxiliary cell is an auxiliary cell except the first auxiliary cell in the auxiliary cells of the UE; the target event is a beam failure BF or a radio link failure RLF.

In a fourth aspect, an embodiment of the present invention provides a network device, including: a receiving module; the receiving module is used for receiving a radio link recovery request of a first cell of the UE from the UE on a second cell of the UE; the wireless link recovery request of the first cell is used for indicating the first cell to generate a target event; the first cell comprises at least one of: a primary cell, a first secondary cell; the second cell comprises at least one of: the primary cell, the first secondary cell, the second secondary cell; the first auxiliary cell is an auxiliary cell for scheduling the main cell; the second auxiliary cell is an auxiliary cell except the first auxiliary cell in the auxiliary cells of the UE; the target event is a beam failure BF or a radio link failure RLF.

In a fifth aspect, an embodiment of the present invention provides a UE, including a processor, a memory, and a computer program stored on the memory and executable on the processor, where the computer program is executed by the processor to implement the steps of the radio link recovery method according to the first aspect.

In a sixth aspect, an embodiment of the present invention provides a network device, including a processor, a memory, and a computer program stored on the memory and executable on the processor, the computer program implementing the steps of the radio link recovery method according to the second aspect when executed by the processor.

In a seventh aspect, an embodiment of the present invention provides a communication system including a UE according to the third aspect and a network device according to the fourth aspect.

In an eighth aspect, embodiments of the present invention provide a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of a radio link recovery method as described above.

In the embodiment of the invention, if a first cell of a UE (including at least one of the primary cell and a first secondary cell (a secondary cell scheduling the primary cell)) generates a target event (BF or RLF), a radio link recovery request of the first cell is sent to a network device in a second cell of the UE (including at least one of the primary cell, the first secondary cell and a second secondary cell (a secondary cell other than the first secondary cell among the secondary cells of the UE)). By means of the scheme, when the target event occurs in the first cell, a radio link recovery request of the first cell can be sent to the network equipment on the second cell (the network equipment can know that the target event occurs in the first cell after receiving the radio link recovery request of the first cell and then further trigger the radio link recovery of the first cell), so that under the condition that the secondary cell schedules the primary cell, if BF or RLF occurs in the primary cell or BF or RLF occurs in the secondary cell, the radio link recovery can be rapidly achieved.

Drawings

Fig. 1 is a schematic diagram of a communication system according to an embodiment of the present invention;

fig. 2 is a flowchart of a radio link recovery method according to an embodiment of the present invention;

fig. 3 is a second flowchart of a radio link recovery method according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a UE according to an embodiment of the present invention;

fig. 5 is a schematic hardware diagram of a UE according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a network device according to an embodiment of the present invention;

fig. 7 is a schematic hardware diagram of a network device according to an embodiment of the present invention.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In embodiments of the invention, words such as "exemplary" or "such as" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "e.g." in an embodiment should not be taken as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.

In the description of the embodiments of the present invention, unless otherwise specified, the meaning of "a plurality of" means two or more, for example, the meaning of a plurality of processing units means two or more; the plurality of elements means two or more elements and the like.

In a high-frequency band communication system, when communication interruption occurs, a traditional wireless link reestablishing mode is adopted to resume communication, and the time is long, so that a mechanism for quickly resuming the wireless link needs to be introduced.

1. Primary cell BF occurrence

In case the primary cell schedules the secondary cell, a beam failure recovery (Beam Failure Recovery, BFR) mechanism of the primary cell is introduced in Rel-15. When the downlink beam of the primary cell of the UE fails, the UE triggers a beam failure recovery request procedure (i.e., beam failure recovery request procedure). For example, the UE may send, i.e., a random access preamble (preamble), on the primary cell and monitor, on the primary cell, the network device's response (i.e., a cell radio network temporary identity (Cell Radio Network Temporary Identifier, C-RNTI)) scrambled PDCCH. After the UE receives the C-RNTI PDCCH, the UE determines that the (serving) beam recovery corresponding to the cell is successful.

The beam failure recovery mechanism generally includes: four items of beam failure detection (Beam failure detection), candidate beam identification (New candidate beam identification), transmit beam failure recovery request (Beam failure recovery request, BFRQ) and receive beam failure recovery request acknowledgement (response for beam failure recovery request), as follows:

beam failure detection: the UE measures a beam failure detection reference signal (beam failure detection reference signal, BFD RS) at the physical layer and determines whether a beam failure event occurs according to the measurement result. The judging conditions are as follows: if the metric (metric) of all service beams (serving beam) is detected (assuming that the physical downlink control channel block error rate (hypothetical Physical Downlink Control Channel block error rate, hypothetical PDCCHBLER)) meets a preset condition (e.g., exceeds a preset threshold), it is determined as a beam failure instance (beam failure instance, BFI), and the UE physical layer reports an indication to the UE higher layer (MAC layer), where the reporting process is periodic, the BFI reporting period is the shortest period of the BFD RS, and the lower bound is 2ms. Conversely, if the UE physical layer determines that beam failure instance does not occur, no indication is sent to higher layers. The UE higher layer counts the BFI reported by the physical layer using a counter and a timer, the timer is restarted every time the BFI is received, the counter is restarted when the timer times out, and when the counter reaches the maximum number of network configurations, the UE determines that a beam failure event has occurred (beam failure event). The counter and timer of the MAC layer of the UE in the prior art are configured for each active bandwidth part (active BWP), and the start and maintenance of the counter and timer on each BWP is independent, i.e. the counter and timer of each BWP work independently, including start, reset, count, timing, etc.

Candidate beam identification: the network device configures a candidate beam reference signal (candidate beam RS) for the UE, and the UE physical layer measures the candidate beam reference signal for a new candidate beam (candidate beam). This step does not have to be performed after the beam failure event, but may be performed before, that is, at any time. When the UE physical Layer receives a request or an indication or a notification from the UE high Layer, reporting a measurement result satisfying a preset condition (the measurement Layer 1-reference signal received power (Layer 1-Reference Signal Receiving Power, L1-RSRP) of candidate beam RS exceeds a preset threshold) to the UE high Layer, wherein the reporting content is { beam RS index, L1-RSRP }, and the UE high Layer selects a candidate beam based on the reporting of the physical Layer.

2. Secondary cell generation BF

Under the condition that the primary cell schedules the secondary cell, a BF recovery mechanism of the secondary cell is introduced into the Rel-16, and the method specifically comprises the following steps:

the network device does not configure the secondary cell with BFR RACH, BFR search space, and BFR core. When the secondary cell generates BF, if there is an uplink resource at this time, a BF recovery request is sent to the network device through the SCell BFR medium access control-control unit (Medium Access Control Control Element, MAC CE) in the uplink resource scheduled by the PDCCH, where the MAC CE carries the identification (id) of the secondary cell where BF occurs. And the network device cannot determine which secondary cells in particular have BF occurred until the BFR MAC CE is received. If the secondary cell does not have uplink resources when BF occurs, the UE firstly sends a scheduling request (Scheduling Request, SR) to request the network equipment to allocate the uplink resources, and then sends BF recovery request to the network equipment through the SCell BFR MAC CE in the uplink resources allocated by the network equipment. The scheduling request is sent on a scheduling request resource specifically configured for Scell BFR.

The network device can learn which secondary cell has BF according to the secondary cell identifier carried in the SCell BFR MAC CE. Similar to the Pcell BFR procedure, the network device also needs to feed back a response to the UE, where the response is an uplink grant (UL grant) for scheduling a new transmission with a C-RNTI scrambling (the uplink grant is also a PDCCH), and the HARQ process id carried in the PDCCH is the same as the HARQ process id of the SCell BFR MAC CE. For example, the UE transmits SCell BFR MAC CE on an uplink resource allocated by downlink control information (Downlink Control Information, DCI) carrying HARQ process id=1, and then receives another DCI carrying HARQ process id=1 scheduling uplink and with a new data indication (New Data Indicator, NDI) flipped, at which point the UE may consider SCell BFR successful and cancel BFR (Beam Failure Recovery procedure successfully completed and cancel all the triggered BFRs for this Serving Cell) all triggers of the secondary cell.

3. Radio link failure (Radio link Failure, RLF)

In a long term evolution (Long Term Evolution, LTE) system or in a 5G new air interface (NR) system, the UE has a radio link monitoring (Radio link Monitor, RLM) function. Taking the RLM function in the LTE system as an example, the UE monitors the radio link by measuring the Signal-to-interference-and-noise ratio (SINR) of a Reference Signal (RS). When the measured reference signal is lower than a certain threshold value, the radio link is considered to be "out-of-sync" ("out-of-OOS"), the physical layer of the UE informs the UE of an "out-of-sync" indication to a higher layer (RRC layer), and if the RRC layer continuously receives N "out-of-sync" indications, the UE starts a Timer (Timer) T1; when the measured reference signal IS higher than a certain threshold value, the radio link IS determined to be synchronous (in-sync, IS), the physical layer informs the RRC layer of an in-sync indication, and if the RRC layer continuously receives M in-sync indications, the UE stops the operation of the Timer T1. The times (N and M) counted by the out-of-sync and in-sync are configured by the network equipment, and the time length of the Timer running after the times are reached is also configurable by the network equipment.

If the timer T1 runs out, the UE judges that the RLF occurs in the corresponding cell.

Under the condition that the secondary cell schedules the primary cell, no matter whether the primary cell generates BF or RLF or the secondary cell schedules the primary cell generates BF or RLF, no mechanism capable of quickly realizing wireless link recovery exists at present. In the embodiment of the present invention, the mechanisms for recovering the wireless link include, but are not limited to, the following two types: BF recovery mechanisms and RLF recovery mechanisms.

In the embodiment of the invention, the primary cell scheduling method may belong to a functional characteristic or capability, the network device or protocol deploys the characteristic or capability, or the UE supports the characteristic or capability, which means that the primary cell scheduling method may occur, and does not mean that each scheduling of the network device is the primary cell scheduling method, and there may still be the primary cell scheduling method, the primary cell self-scheduling method, the secondary cell scheduling method, and the like. In case the first condition is fulfilled, a secondary cell scheduling primary cell may occur. The first condition may specifically include any one of the following: 1. the network equipment or the protocol configures the characteristic that the first auxiliary cell can schedule the main cell or the main cell can be scheduled by other cells; 2. the network device or protocol, etc., indicates that the first secondary cell has a characteristic that can schedule the primary cell or that the primary cell can be scheduled by other cells; 3. the control signaling (may) of the first secondary cell indicates the primary cell; 4. the main cell is a scheduled cell; 5. the primary cell corresponds to a certain scheduled cell identity (e.g. CIF = a certain value, indicating that it is the primary cell).

The embodiment of the invention provides a radio link recovery method, which is characterized in that if a first cell of UE (comprising at least one of a main cell and a first auxiliary cell (an auxiliary cell for scheduling the main cell)) generates a target event (BF or RLF), a radio link recovery request of the first cell is sent to network equipment on a second cell of the UE (comprising at least one of the main cell, the first auxiliary cell and the second auxiliary cell (the auxiliary cells of the UE except the first auxiliary cell)). By means of the scheme, when the target event occurs in the first cell, a radio link recovery request of the first cell can be sent to the network equipment on the second cell (the network equipment can know that the target event occurs in the first cell after receiving the radio link recovery request of the first cell and then further trigger the radio link recovery of the first cell), so that under the condition that the secondary cell schedules the primary cell, if BF or RLF occurs in the primary cell or BF or RLF occurs in the secondary cell, the radio link recovery can be rapidly achieved.

The technical scheme provided by the invention can be applied to various communication systems, such as a 5G communication system, a future evolution system, or various communication fusion systems and the like. Various application scenarios may be included, such as machine-to-machine (Machine to Machine, M2M), D2M, macro-micro communication, enhanced mobile internet (enhance Mobile Broadband, eMBB), ultra-high reliability and ultra-low latency communication (ultra-low latency & Low Latency Communication, uilllc), and mass internet of things communication (Massive Machine Type Communication, mctc). These scenarios include, but are not limited to: in the context of communication between UEs, or between a network device and a network device, or between a network device and a UE. The embodiment of the invention can be applied to communication between network equipment and UE in a 5G communication system, or communication between UE and UE, or communication between network equipment and network equipment.

Fig. 1 shows a schematic diagram of one possible architecture of a communication system according to an embodiment of the present invention. As shown in fig. 1, the communication system includes at least one network device 100 (only one is illustrated in fig. 1) and one or more UEs 200 (only one is illustrated in fig. 1) to which each network device 100 is connected.

The at least one network device 100 may serve at least one cell group, such as a primary cell group (Master Cell Group, MCG) or a secondary cell group (Secondary Cell Group, SCG). Wherein, a cell group at least comprises a main cell and possibly at least one auxiliary cell; in the embodiment of the invention, the primary cell is a special cell (SPcell), which may be a Pcell in MCG or a PScell in SCG.

The communication system shown in fig. 1 may be a multi-carrier communication system, for example, a carrier aggregation scenario, a dual connectivity scenario, etc., which are not limited by the embodiments of the present invention.

The network device 100 may be a base station, a core network device, a transmitting and receiving node (Transmission and Reception Point, TRP), a relay station, an access point, or the like. The network device 100 may be a base transceiver station (Base Transceiver Station, BTS) in a global system for mobile communications (Global System for Mobile communication, GSM) or code division multiple access (Code Division Multiple Access, CDMA) network, an NB (NodeB) in wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA), or an eNB or eNodeB (evolutional NodeB) in LTE. The network device 100 may also be a wireless controller in the context of a cloud wireless access network (Cloud Radio Access Network, CRAN). The network device 100 may also be a network device in a 5G communication system or a network device in a future evolution network. The words are not to be interpreted as limiting the invention.

UE 200 may be a wireless UE, which may be a device that provides voice and/or other traffic data connectivity to a user, a handheld device, computing device, or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, a UE in a future 5G network, or a UE in a future evolved PLMN network, etc. The wireless UE may communicate with one or more core networks via a radio access network (Radio Access Network, RAN), which may be Mobile devices such as Mobile phones (or "cellular" phones) and computers with Mobile devices, e.g., portable, pocket, hand-held, computer-built-in or car-mounted Mobile devices that exchange voice and/or data with the radio access network, as well as personal communication services (Personal Communication Service, PCS) phones, cordless phones, session initiation protocol (Session Initiation Protocol, SIP) phones, wireless local loop (Wireless Local Loop, WLL) stations, personal digital assistants (Personal Digital Assistant, PDAs), etc., as well as Mobile devices, terminal devices, access Terminal devices, wireless communication devices, terminal device units, terminal device stations, mobile stations (Mobile stations), remote stations (Remote stations), remote Terminal devices (Remote terminals), subscriber units (Subscriber units), subscriber stations (Subscriber Station), user agents (Terminal devices, etc. As an example, in the embodiment of the present invention, fig. 1 illustrates that UE 200 is a mobile phone.

The following describes in detail, by taking interaction between a UE and a network device as an example, through a specific embodiment and an application scenario thereof, a method and a device for recovering a radio link according to embodiments of the present invention.

Based on the communication system shown in fig. 1, an embodiment of the present invention provides a radio link recovery method, which may include steps 201 to 202 described below, as shown in fig. 2.

Step 201, if a target event occurs in a first cell of the UE, the UE sends a radio link recovery request of the first cell to the network device on a second cell of the UE.

Wherein the first cell comprises at least one of: the primary cell, the first secondary cell; the second cell comprises at least one of: the primary cell, the first secondary cell, the second secondary cell; the first auxiliary cell is an auxiliary cell for scheduling the main cell, and the second auxiliary cell is an auxiliary cell except the first auxiliary cell in the auxiliary cells of the UE; the target event is BF or RLF.

It can be understood that the radio link recovery method provided by the embodiment of the present invention may be applicable to a scenario in which a target event occurs in a primary cell, may be applicable to a scenario in which a target event occurs in a first secondary cell (a secondary cell scheduling the primary cell), and may also be applicable to a scenario in which a target event occurs in both the primary cell and the first secondary cell, and may be specifically determined according to actual use requirements.

It may be appreciated that in the embodiment of the present invention, the second cell may include any one of the following 7 cases: 1. a primary cell; 2. a first secondary cell, 3, a second secondary cell (at least one secondary cell other than the first secondary cell among the secondary cells of the UE); 4. a primary cell and a first secondary cell; 5. a primary cell and a second secondary cell; 6 a first auxiliary cell and a second auxiliary cell; 7. a primary cell, a first secondary cell, and a second secondary cell.

It can be understood that, in the embodiment of the present invention, if BF occurs in the first cell, the radio link recovery request of the first cell is a beam failure recovery request; if the first cell generates RLF, the radio link recovery request of the first cell is a radio link failure recovery request.

Step 202, the network device receives, on a second cell of the UE, a radio link recovery request of a first cell of the UE from the UE.

The radio link recovery request of the first cell is used for indicating the first cell to generate a target event.

Optionally, in the embodiment of the present invention, if the first cell has a target event in the case that the first secondary cell of the UE schedules the primary cell of the UE, the UE and the network device may interact with a radio link recovery request of the first cell through any bearer, where the specific bearer may be determined according to actual use requirements.

Optionally, in the embodiment of the present invention, if the first cell has a target event under the condition that the first secondary cell of the UE schedules the primary cell of the UE, the UE may send a radio link recovery request of the first cell to the network device through a specific bearer.

Illustratively, the above step 201 may be specifically implemented by the following step 201 a; the above step 202 may be specifically implemented by the following step 202 a.

Step 201a, the UE sends a radio link recovery request of the first cell to the network device through the first bearer on the second cell.

Step 202a, the network device receives, on the second cell, a radio link recovery request of the first cell from the UE via the first bearer.

In the embodiment of the invention, the UE sends the radio link recovery request of the first cell to the network equipment through the specific carrier, so that the radio link recovery can be better and quickly realized.

Optionally, in an embodiment of the present invention, the first carrier may include at least one of: target RACH, target scheduling request, target MAC CE.

It may be appreciated that in the embodiment of the present invention, the first bearer may include one or more of a target random access channel RACH, a target scheduling request, and a target medium access control-control element MAC CE.

It will be appreciated that for any one of the second cells, the UE may send a radio link recovery request of the first cell to the network device over a first bearer (the network device may receive a radio link recovery request of the first cell from the UE over a first bearer over the cell); the UE may send radio link recovery requests of the first cell to the network device over the different first bearers, respectively (the network device may receive radio link recovery requests of the first cell from the UE over the different first bearers, respectively, over the cell).

Illustratively, the target event is BF, the first cell is a first secondary cell, and the second cell is a primary cell. The first secondary cell generates BF, in one case, the UE may send a radio link failure recovery request to the network device through a target RACH corresponding to the primary cell in the primary cell; in another case, the UE may send, on the primary cell, a radio link failure recovery request to the network device through a target RACH corresponding to the primary cell and a target scheduling request corresponding to the primary cell, respectively.

It may be appreciated that, for different cells in the second cell, the UE may send the radio link recovery request of the first cell to the network device over the same first bearer on the different cells, respectively (the network device may receive the radio link recovery request of the first cell from the UE over the same first bearer on the different cells); the UE may send the radio link recovery request of the first cell to the network device over different first bearers on different cells, respectively (the network device may receive the radio link recovery request of the first cell from the UE over different first bearers on different cells).

Illustratively, the target event is BF, the first cell is a primary cell, and the second cell is a primary cell and a first secondary cell. The primary cell generates BF, in one case, the UE may send a beam failure recovery request of the first cell to the network device through a target RACH corresponding to the primary cell on the primary cell, and simultaneously, the UE sends a beam failure recovery request of the first cell to the network device through a target RACH corresponding to the first secondary cell on the first secondary cell; in another case, the UE may send, on the primary cell, a beam failure recovery request of the first cell to the network device through a target RACH corresponding to the primary cell, and simultaneously, on the first secondary cell, the UE sends, on the first secondary cell, a beam failure recovery request of the first cell to the network device through a target MAC CE corresponding to the first secondary cell.

In the embodiment of the present invention, the first carrier may also be another feasible carrier, which is not limited in the embodiment of the present invention.

In the embodiment of the invention, a plurality of first carriers are provided, which is beneficial to quickly realizing wireless link recovery.

The following details are given for the case where the first bearer includes the target RACH, the first bearer includes the target scheduling request, and the first bearer includes the target MAC CE.

The first bearer includes a target RACH.

Optionally, in the embodiment of the present invention, the target RACH is used to restore a radio link of the first cell, specifically, the target RACH may be dedicated to restore a radio link of the first cell, or may be used for other functions, and may be specifically determined according to actual use requirements, which is not limited by the embodiment of the present invention.

The first bearer includes the target scheduling request.

Optionally, in the embodiment of the present invention, in a case where the first bearer includes the target scheduling request, the target scheduling request is at least one of N scheduling requests for recovering a radio link of the first cell, where N is a positive integer.

It may be understood that, in the embodiment of the present invention, the target scheduling request is any at least one of N scheduling requests for recovering the radio link of the first cell, or may be at least one of the N scheduling requests that satisfies a certain condition, which may be specifically determined according to actual use requirements, and the embodiment of the present invention is not limited.

Illustratively, in the case that the first cell includes a primary cell, the N scheduling requests are scheduling requests for recovering radio links of the primary cell or the N scheduling requests are scheduling requests for recovering radio links of the primary cell and the first secondary cell.

In an exemplary case where the first cell includes the first secondary cell, the N scheduling requests are scheduling requests for recovering radio links of the first secondary cell, or the N scheduling requests are scheduling requests for recovering radio links of the primary cell and the first secondary cell.

In the embodiment of the present invention, the N scheduling requests may be scheduling requests dedicated to recovering the radio link of the first cell, or may be scheduling requests not dedicated to recovering the radio link of the first cell (i.e., the N scheduling requests may be used for other scheduling in addition to recovering the radio link of the first cell), which is not limited in the embodiment of the present invention.

In the embodiment of the invention, the target scheduling request is at least one of N scheduling requests for recovering the wireless link of the first cell, so that the wireless link recovery can be better and faster realized.

Optionally, in the embodiment of the present invention, each of M scheduling requests in the N scheduling requests is associated with a candidate beam reference signal, where M is a positive integer less than or equal to N.

It will be appreciated that in the embodiment of the present invention, at least one candidate beam reference signal is associated with each of the M scheduling requests.

Optionally, none of the N scheduling requests are associated with a candidate beam reference signal except the M scheduling requests associated with a candidate beam reference signal.

In this way, the target scheduling request may include a scheduling request associated with the candidate beam reference signal, or may include a scheduling request not associated with the candidate beam reference signal, which may be specifically determined according to an actual use requirement, which is not limited by the embodiment of the present invention.

In the embodiment of the invention, the N scheduling requests can include the scheduling requests associated with the candidate beam reference signals and the scheduling requests not associated with the candidate beam reference signals, so that a plurality of possible choices are provided for the target scheduling requests, and the wireless link recovery can be better and quickly realized.

Optionally, in an embodiment of the present invention, the target scheduling request is determined based on a measurement result of a candidate beam reference signal associated with each of the M scheduling requests.

It is understood that the target scheduling request is at least one of the M scheduling requests.

In the embodiment of the invention, the target scheduling request is at least one of the M scheduling requests, so that the wireless link recovery can be better and faster realized.

Optionally, in the embodiment of the present invention, the target scheduling request may also be any at least one of the M scheduling requests.

Optionally, in the embodiment of the present invention, in a case where the target scheduling request is determined based on a measurement result of a candidate beam reference signal associated with each of the M scheduling requests, the target scheduling request is a scheduling request corresponding to a first candidate beam reference signal; wherein the first candidate beam reference signal is a candidate beam reference signal satisfying a predetermined condition.

Further alternatively, in an embodiment of the present invention, the predetermined condition includes any one of the following: the first candidate beam reference signals are candidate beam reference signals with the measurement result being greater than or equal to a first threshold value in the candidate beam reference signals associated with the M scheduling requests; the first candidate beam reference signal is at least one of candidate beam reference signals associated with the M scheduling requests, and the index of the corresponding candidate beam is the smallest; the first candidate beam reference signal is at least one of the candidate beam reference signals associated with the M scheduling requests, and the index of the corresponding candidate beam is the largest; the first candidate beam reference signal is at least one of candidate beam reference signals associated with the M scheduling requests, and an index of a corresponding candidate beam is closest to an index of a beam of the first cell.

In the embodiment of the present invention, the value range of the first threshold may be determined according to actual use requirements, and the embodiment of the present invention is not limited.

In the embodiment of the invention, the target scheduling request is the scheduling request corresponding to the candidate beam reference signal meeting the preset condition, and the wireless link recovery can be better and quickly realized. Moreover, in the embodiment of the invention, the possible situations of various preset conditions are provided, so that a more suitable target scheduling request can be determined according to actual use requirements, and the wireless link recovery can be realized better and faster.

Optionally, in an embodiment of the present invention, the target scheduling request is a scheduling request of an unassociated candidate beam reference signal. For example, the target scheduling request may be any at least one of the scheduling requests of the unassociated candidate beam reference signals.

Optionally, in the embodiment of the present invention, the target scheduling request is a scheduling request in which the UE does not detect an associated candidate beam reference signal (it is understood that at least one scheduling request in the target scheduling request may be associated with a candidate beam reference signal, but the UE does not detect its associated candidate beam reference signal). For example, the target scheduling request may be any at least one of scheduling requests for which the UE does not detect the associated candidate beam reference signal.

In the embodiment of the invention, various schemes for obtaining the target scheduling request are provided, so that a more suitable target scheduling request can be determined according to actual use requirements, and the wireless link recovery can be better and quickly realized.

The first bearer includes the target MAC CE.

Optionally, in the embodiment of the present invention, in the case that the first bearer includes the target MAC CE, the UE needs to determine whether there is a suitable available uplink resource in the second cell, and if there is a suitable available uplink resource, send the target MAC CE to the network device through the uplink resource; otherwise, the UE needs to request uplink resources from the network device.

For example, in the case that the first bearer includes the target MAC CE, if the second cell has an uplink resource, the above step 201a may be specifically implemented by the following step 201 b; the above step 202a may be specifically implemented by the following step 202 b.

In step 201b, if the second cell has the first uplink resource, the UE sends a radio link recovery request of the first cell to the network device through the target MAC CE on the first uplink resource.

In step 202b, if the second cell has the first uplink resource, the network device receives, from the UE, a radio link recovery request of the first cell on the first uplink resource through the target MAC CE.

The first uplink resource is a suitable available uplink resource present on the second cell.

It can be appreciated that in the embodiment of the present invention, if an uplink resource is available for new transmission and an uplink shared channel (Uplink Shared Channel, UL-SCH) resource can accommodate a MAC CE (if UL resources are available for a new transmission and the UL-SCH resources can accommodate the MAC CE), the uplink resource is the first uplink resource.

For example, in the case where the first bearer includes the target MAC CE, before the step 201a, the radio link recovery method provided in the embodiment of the present invention may further include the following steps 203 to 204 if the second cell does not have an uplink resource.

Step 203, if the second cell does not have the uplink resource, the UE sends a first scheduling request to the network device.

Step 204, if the second cell does not have the uplink resource, the network device receives a first scheduling request from the UE.

Further illustratively, following the step 204, the radio link recovery method provided by the embodiment of the present invention may further include the following steps 205-206; the step 201a may be specifically implemented by the following step 201 c; the above step 202a may be specifically implemented by the following step 202 c.

Step 205, the network device sends a target uplink grant to the UE.

Step 206, the UE receives the target uplink grant from the network device.

Step 201c, the UE sends a radio link recovery request of the first cell to the network device through the target MAC CE on an uplink resource corresponding to the target uplink grant of the second cell.

In step 202c, the network device receives, from the UE, a radio link recovery request of the first cell through the target MAC CE on an uplink resource corresponding to the target uplink grant of the second cell.

In the embodiment of the invention, the scheme of how to send the wireless link recovery request of the first cell to the network equipment through the target MAC CE is provided for the two conditions that the UE has the uplink resource and does not have the uplink resource on the second cell, so that the wireless link recovery can be better and quickly realized.

Optionally, in an embodiment of the present invention, the first scheduling request meets any one of the following: a scheduling request for recovering the radio link of the first cell, and a scheduling request for recovering the radio link of any secondary cell.

It is to be appreciated that the first scheduling request is used to recover the radio link of the first cell, and specifically includes that the first scheduling request may be a radio link dedicated to recovering the first cell, or the first scheduling request may be used for other functions in addition to the radio link of the first cell.

It may be appreciated that the first scheduling request is used to recover the radio link of any secondary cell, and specifically includes that the first scheduling request may be a radio link dedicated to recovering any secondary cell, or the first scheduling request may be used for other functions besides recovering the radio link of any secondary cell.

In an exemplary case where the first cell includes a primary cell, the first scheduling request is a scheduling request for recovering a radio link of the primary cell, or is a scheduling request for recovering radio links of the primary cell and the first secondary cell, or is a scheduling request for recovering a radio link of any secondary cell.

In an exemplary case where the first cell includes a first secondary cell, the first scheduling request is a scheduling request for recovering a radio link of the first secondary cell, or is a scheduling request for recovering radio links of the primary cell and the first secondary cell, or is a scheduling request for recovering a radio link of any secondary cell.

Alternatively, in the embodiment of the present invention, the first scheduling request may also be any scheduling request, which is not limited by the embodiment of the present invention.

In the embodiment of the invention, a plurality of possible first scheduling requests are provided, so that the first scheduling requests can be determined according to actual use requirements, and when the first scheduling requests are scheduling requests for recovering the wireless links of the first cell or the wireless links of any auxiliary cell, the wireless link recovery can be better and faster realized.

Further alternatively, in case the first scheduling request is a scheduling request for recovering the radio link of the first cell, the above-mentioned steps 205-206 may be implemented specifically by the following steps 205 a-206 a.

In step 205a, the network device sends a target uplink grant to the UE on a cell other than the first cell in the cells of the UE.

The network equipment receives a first scheduling request for recovering the wireless link of the first cell, and can know that the first cell has a target event, so that the target uplink grant is sent to the UE on the cell except the first cell in the cells of the UE, and the UE can be ensured to receive the target uplink grant.

Step 206a, the UE receives the target uplink grant from the network device on a cell other than the first cell among the cells of the UE.

In the embodiment of the invention, under the condition that the target event occurs in the first cell, after receiving the first scheduling request for recovering the wireless link of the first cell, the network equipment sends the target uplink grant to the UE from the cells except the first cell, so that the UE can be ensured to receive the target uplink grant, and the wireless link recovery can be better and quickly realized.

Further alternatively, in the case where the first scheduling request is a scheduling request for recovering a radio link of any secondary cell, the above steps 205 to 206 may be implemented specifically by the following steps 205b to 206 b.

Step 205b, the network device sends the target uplink grant to the UE on any secondary cell except the primary cell and the first secondary cell in the cell of the UE.

The network equipment receives the first scheduling request for recovering the wireless link of any auxiliary cell, and can know that a target event occurs in a cell, but does not know which cell or cells specifically occur the target event, so that the network equipment sends a target uplink grant to the UE on any auxiliary cell except the primary cell and the first auxiliary cell in the cell of the UE, the UE can be ensured to receive the target uplink grant, and the wireless link recovery can be better and quickly realized.

Step 206b, the UE receives the target uplink grant from the network device on any secondary cell except the primary cell and the first secondary cell in the cell of the UE.

In the embodiment of the invention, under the condition that the target event occurs in the first cell, after the network equipment receives the first scheduling request for recovering the wireless link of any auxiliary cell, the target uplink grant is sent from the UE on any auxiliary cell except the main cell and the first auxiliary cell, so that the UE can be ensured to receive the target uplink grant, and the wireless link recovery can be better and faster realized.

Optionally, the target MAC CE satisfies at least one of: the wireless link is used for recovering the wireless link of the first cell and carries the target identifier; wherein the target identity is used to indicate the first cell.

It can be appreciated that in the embodiment of the present invention, the target MAC CE is associated with the first cell. Specifically, the target MAC CE may be a MAC CE for recovering a radio link of the first cell, or may be a MAC CE carrying a target identifier, or may be a MAC CE for recovering a radio link of the first cell and carrying a target identifier.

It may be understood that, for the target MAC CE to be a MAC CE for recovering a radio link of the first cell, where the first cell includes a primary cell, the target MAC CE may be a MAC CE for recovering a radio link of the primary cell, or may be a MAC CE for recovering a radio link of the primary cell and the first secondary cell; in the case that the first cell includes the first secondary cell, the target MAC CE may be a MAC CE for recovering the radio link of the first secondary cell, or may be a MAC CE for recovering the radio links of the primary cell and the first secondary cell.

Optionally, for the target MAC CE to be a MAC CE carrying a target identifier, in this embodiment of the present invention, the target identifier may be at least one identifier.

Optionally, in the embodiment of the present invention, the target identifier may be any one of the following: the method comprises the steps of identifying a primary cell, identifying a first auxiliary cell, identifying any one auxiliary cell, identifying the primary cell and identifying the first auxiliary cell, and combining the primary cell and the first auxiliary cell. The target identifier may also be other, and embodiments of the present invention are not limited.

Optionally, in the embodiment of the present invention, the combined identifier of the primary cell and the first secondary cell may be a certain identifier corresponding to the combination of the primary cell and the first secondary cell, that is, different groups of cells correspond to different identifiers.

In the embodiment of the invention, the identification of the cell can be the id of the cell or the index of the cell, and can also be other feasibility contents, and the embodiment of the invention is not limited.

Illustratively, in the case that the first cell is a primary cell, the target identifier is used to indicate the primary cell, and the target identifier may be any one of the following: the method comprises the steps of identifying a primary cell, identifying a first auxiliary cell, identifying any one auxiliary cell, identifying the primary cell and identifying the first auxiliary cell, and combining the primary cell and the first auxiliary cell.

In an exemplary case where the first cell is a first secondary cell, the target identifier is used to indicate the first secondary cell, and the target identifier may be any one of the following: the method comprises the steps of identifying a primary cell, identifying a first auxiliary cell, identifying any one auxiliary cell, identifying the primary cell and identifying the first auxiliary cell, and combining the primary cell and the first auxiliary cell.

In an exemplary case that the first cell is a primary cell and a first secondary cell, the target identifier is used to indicate the primary cell and the first secondary cell, and the target identifier may be any one of the following: the method comprises the steps of identifying a primary cell, identifying a first auxiliary cell, identifying any one auxiliary cell, identifying the primary cell and identifying the first auxiliary cell, and combining the primary cell and the first auxiliary cell.

Alternatively, in the case that the first cell is a primary cell and a first secondary cell, the target identifier may include a first identifier and a second identifier. The first identifier is used for indicating the primary cell, and the second identifier is used for indicating the first secondary cell.

It will be appreciated that the specific descriptions of the first identifier and the second identifier may refer to the above description about the target identifier, which is not repeated herein.

In the embodiment of the present invention, the target identifier indicates the first cell, which may be that the target identifier itself indicates the first cell, or that a certain parameter corresponding to the target identifier indicates the first cell, or may be other situations, which is not limited by the embodiment of the present invention. For example, a bitmap, each bit corresponds to a cell, when a bit of 1 indicates that a BF appears in the corresponding cell, and when a bit of 0 indicates that no BF appears in the corresponding cell, the target identifier is not a cell identifier (e.g., id) but a bit corresponding to the cell identifier.

In the embodiment of the invention, under the condition that the target MAC CE is associated with the first cell, the network equipment can quickly acquire that the first cell has the target event according to the target MAC CE, so that the wireless link recovery can be better and quickly realized.

Alternatively, in the embodiment of the present invention, the target MAC CE may also be a MAC CE that is not associated with the first cell, which is not limited by the embodiment of the present invention.

Optionally, if the UE detects a target candidate beam, the target MAC CE carries at least one of the following: index of the target candidate beam, first indication information; the first indication information is used for indicating that the UE detects the target candidate beam; if the UE does not detect the target candidate beam, the target MAC CE carries second indication information; the second indication information is used to indicate that the UE does not detect the target candidate beam.

In the embodiment of the invention, at least one of the index of the target candidate beam and the first indication information is carried in the target MAC CE, or the second indication information is carried, so that the network equipment can conveniently know whether the UE detects the proper target candidate beam for carrying out wireless link recovery, and the wireless link recovery can be better and quickly realized.

In a further optional case, based on the above steps 201 b-202 b, if the UE detects a target candidate beam, the target MAC CE carries at least one of the following: index of the target candidate beam, first indication information; the first indication information is used for indicating that the UE detects the target candidate beam; if the UE does not detect the target candidate beam, the target MAC CE carries second indication information; the second indication information is used to indicate that the UE does not detect the target candidate beam.

Still another alternative case, based on the above steps 203-204, if the UE detects a target candidate beam, at least one of the first scheduling request and the target MAC CE carries at least one of the following: index of the target candidate beam, first indication information; the first indication information is used for indicating that the UE detects the target candidate beam (namely, three conditions are divided into a first type, wherein the first scheduling request carries at least one of the following items, namely, the index of the target candidate beam, the first indication information, a second type, the target MAC CE carries at least one of the following items, namely, the index of the target candidate beam, the first indication information, a third type, the first scheduling request and the target MAC CE each carry at least one of the following items, namely, the index of the target candidate beam and the first indication information; if the UE does not detect the target candidate beam, carrying second indication information by at least one of the first scheduling request and the target MAC CE; the second indication information is used for indicating that the UE does not detect the target candidate beam (i.e. the UE is divided into three cases, namely, the first case, the second indication information in the first scheduling request, the second case, the second indication information carried in the target MAC CE, and the third case, the second indication information carried in both the first scheduling request and the target MAC CE.

In the embodiment of the invention, at least one of the index of the target candidate beam and the first indication information is carried in at least one of the first scheduling request and the target MAC CE, or the second indication information is carried, so that the network equipment can conveniently know whether the UE detects the suitable target candidate beam for carrying out wireless link recovery, and the wireless link recovery can be better and quickly realized.

Optionally, in the embodiment of the present invention, the target MAC CE is associated with (at least one) candidate beam reference signal. In case that the target MAC CE carries at least one of the index of the target candidate beam and the first indication information, the target MAC CE is associated with (at least one) candidate beam reference signal, and the UE detects a suitable target candidate beam based on the measurement result of the candidate beam reference signal associated with the target MAC CE. In the case that the target MAC CE carries the second indication information, the target MAC CE is associated with (at least one) candidate beam reference signal, and the UE does not detect a suitable (i.e., satisfies a certain condition, and the specific condition may refer to the above description of the predetermined condition, which is not repeated here) target candidate beam based on the measurement result of the candidate beam reference signal associated with the target MAC CE.

Optionally, in the embodiment of the present invention, the target MAC CE may also be a MAC CE of the unassociated candidate beam reference signal.

Optionally, in the embodiment of the present invention, the target MAC CE may also be a MAC CE for which the UE does not detect the associated candidate beam reference signal (it may be understood that the target MAC CE may be associated with the candidate beam reference signal, but the UE does not detect its associated candidate beam reference signal).

Optionally, in an embodiment of the present invention, the first scheduling request is associated with (at least one) candidate beam reference signal. In the case that the first scheduling request carries at least one of the index and the first indication information of the target candidate beam, the first scheduling request is associated with (at least one) candidate beam reference signal, and the UE detects an appropriate target candidate beam based on the measurement result of the candidate beam reference signal associated with the first scheduling request (i.e., a specific condition is satisfied, and the specific condition may refer to the above description of the predetermined condition, which is not repeated here). In case the second indication information is carried in the first scheduling request, the first scheduling request is associated with (at least one) candidate beam reference signal, and the UE does not detect a suitable target candidate beam based on the measurement result of the candidate beam reference signal associated with the first scheduling request.

Optionally, in the embodiment of the present invention, the first scheduling request may also be a scheduling request of an unassociated candidate beam reference signal.

Alternatively, in the embodiment of the present invention, the first scheduling request may also be a scheduling request in which the UE does not detect the associated candidate beam-reference signal (it may be understood that the first scheduling request may be associated with the candidate beam-reference signal, but the UE does not detect its associated candidate beam-reference signal).

Optionally, before the above step 201, the UE needs to acquire resources for recovering the radio link of the first cell.

Illustratively, before the step 201, the radio link recovery method provided by the embodiment of the present invention may further include a step 207 described below.

Step 207, the UE acquires first target configuration information.

The first target configuration information is used for recovering the wireless link of the first cell.

Optionally, in the embodiment of the present invention, the first target configuration information may be dedicated to recovering the radio link of the first cell; the first target configuration information may also be used for both restoring the radio link of the first cell and for other scheduling than restoring the radio link of the first cell.

It will be appreciated that configuration information for the first target is used to both restore the radio link of the first cell and to schedule other than to restore the radio link of the first cell: in one possible scenario, the first target configuration information may be used for both restoring the radio link of the first cell and for other scheduling. In another possible scenario, the first target configuration information includes configuration information for recovering the radio link of the first cell, and further includes configuration information for other scheduling.

In the embodiment of the invention, after the UE acquires the first target configuration information, the second cell can be determined according to the first target configuration information, and then the wireless link recovery request of the first cell is sent to the network equipment on the second cell, so that the wireless link recovery can be better and faster realized.

Optionally, the first target configuration information may be determined by the UE itself, or may be preconfigured by the network device for the UE, or may be specified by a protocol, or may be other feasibility conditions, and may specifically be determined according to an actual use requirement, which is not limited by the embodiment of the present invention.

For example, in the case where the first target configuration information is that the network device is preconfigured for the UE, before the step 207, the radio link recovery method provided by the embodiment of the present invention may further include the following step 208; the above step 207 may be specifically realized by the following step 207 a.

Step 208, the network device sends the first target configuration information to the UE.

Step 207a, the UE receives first target configuration information from the network device.

In the embodiment of the present invention, the cell in which the first target configuration information is obtained and the first cell in the cell of the UE may be the same or different (i.e., the first target configuration information is used for radio link recovery of the first cell, but the cell in which the first target configuration information is obtained may be the first cell or may be another cell other than the first cell), which is not limited by the embodiment of the present invention. For example, the network device issues first target configuration information at cell C, where the first target configuration information is used for a request procedure in a radio link recovery procedure of cell B.

Illustratively, following the step 207, the step 201 may be implemented by the following step 201 d; the above step 202 may be specifically implemented by the following step 202 d.

Step 201d, the UE sends, on the second cell, a radio link recovery request of the first cell to the network device according to the first target configuration information.

Step 202d, the network device receives, on the second cell, a radio link recovery request of the first cell from the UE according to the first target configuration information.

In the embodiment of the invention, the UE determines the second cell according to the first target configuration information, and sends the radio link recovery request of the first cell to the network equipment on the second cell, so that the radio link recovery can be better and faster realized.

Optionally, based on step 207 above, the first target configuration information includes at least one (one or more of): the configuration information related to the primary cell, the configuration information related to the first secondary cell, and the configuration information related to the combination of the primary cell and the first secondary cell.

In the embodiment of the invention, the configuration information related to the primary cell is used for recovering the wireless link of the primary cell, the configuration information related to the first secondary cell is used for recovering the wireless link of the first secondary cell, and the configuration information related to the combination of the primary cell and the first secondary cell is used for at least one of recovering the wireless link of the primary cell and recovering the wireless link of the first secondary cell.

In the embodiment of the invention, the first target configuration information is used for recovering the wireless link of the first cell, but the first target configuration information can be configured on any cell. For example, the configuration information related to the primary cell is used for radio link recovery of the primary cell, but the configuration information related to the primary cell may be configured on at least one of the primary cell, the first secondary cell, and other secondary cells, which may be specifically determined according to actual use requirements, and embodiments of the present invention are not limited.

Illustratively, the Pcell BFR RACH is configured on a Scheduling Scell, e.g., for Pcell BF, on which the UE sends a Pcell BFR RACH to send BFR requests to the network device.

Optionally, based on the step 207a described above, the first target configuration information comprises at least one (one or more of): the network equipment is the configuration information related to the primary cell configured by the UE, the network equipment is the configuration information related to the first secondary cell configured by the UE, and the network equipment is the configuration information related to the combination of the primary cell and the first secondary cell configured by the UE.

Further optionally, each of the first target configuration information includes at least one of: RACH of a corresponding cell, scheduling request of the corresponding cell.

Illustratively, if the first target configuration information includes configuration information related to the primary cell, the configuration information related to the primary cell includes at least one of: RACH of the primary cell, scheduling request of the primary cell. If the first target configuration information includes configuration information related to the first secondary cell, the configuration information related to the first secondary cell includes at least one of: RACH of the first secondary cell, scheduling request of the first secondary cell. If the first target configuration information includes configuration information related to the primary cell and the first secondary cell, the configuration information related to the primary cell and the first secondary cell includes at least one of the following: RACH of the primary cell and the first secondary cell, scheduling request of the primary cell and the first secondary cell.

In the embodiment of the invention, the possibility of multiple first target configuration information is provided, and the first target configuration information can be determined according to the actual use requirement, so that the wireless link recovery can be better and quickly realized.

Optionally, in the embodiment of the present invention, after the step 202, the network device may send a radio link recovery response of the first cell to the UE in a case of accepting the radio link recovery request of the first cell of the UE.

Illustratively, in conjunction with fig. 2, as shown in fig. 3, after step 202, the radio link recovery method provided in the embodiment of the present invention may further include the following steps 209-210.

Step 209, the network device sends a radio link recovery response of the first cell to the UE on the third cell.

Step 210, the UE receives a radio link recovery response of the first cell from the network device on the third cell.

The third cell is at least one cell of the second cells.

Optionally, in the embodiment of the present invention, the network device may send, to the UE, a radio link recovery response of the first cell through any resource, in case of accepting the radio link recovery request of the first cell of the UE.

In the embodiment of the invention, after receiving the radio link recovery response of the first cell from the network equipment, the UE successfully recovers the radio link of the first cell on the third cell.

Optionally, in the embodiment of the present invention, the network device sends the radio link recovery response of the first cell to the UE on a specific resource.

Illustratively, the foregoing step 209 may be specifically implemented by the following step 209 a; the above step 210 may be specifically implemented by the following step 210 a.

Step 209a, the network device sends a radio link recovery response of the first cell to the UE on the first resource of the third cell.

Step 210a, the UE receives a radio link recovery response of the first cell from the network device on a first resource of the third cell.

In the embodiment of the invention, the network equipment sends the wireless link recovery response of the first cell to the UE on the specific resource, so that the wireless link recovery can be better and quickly realized.

Optionally, in an embodiment of the present invention, the first resource includes at least one of: the target CORESET, target search space, and the third cell includes a target common search space (Common Search Space, CSS) for the primary cell.

It may be appreciated that in the embodiment of the present invention, the first resource includes: the first resource comprises the target common search space when the third cell comprises the primary cell, in particular if and only if the third cell comprises the primary cell.

Illustratively, the target common search space may include at least one of type0/0A/1/2/3 CSS.

It will be appreciated that in embodiments of the present invention, the first resource may comprise one or more of a target CORESET, a target search space, and a target common search space (Common Search Space, CSS) when the third cell comprises the primary cell.

It will be appreciated that for any one of the third cells, the network device may send a radio link recovery response for the first cell to the UE on a first resource of the cell (the UE may receive a radio link recovery response for the first cell from the network device on a first resource of the cell); the network device may also send radio link recovery responses of the first cell to the UE on different first resources of the cell, respectively (the UE may receive radio link recovery responses of the first cell from the network device on different first resources of the cell, respectively).

Illustratively, the target event is RLF, the first cell is a first secondary cell, the second cell is a primary cell, and the third cell is a primary cell. The first secondary cell generates RLF, in one case, the network device may send a radio link failure recovery response to the UE on the target CORESET of the primary cell; in another case, the UE may send a radio link failure recovery response to the UE on the target core of the primary cell and the target search space of the primary cell, respectively.

The target event is BF, the first cell is a primary cell, the second cell is a first secondary cell, and the third cell is a first secondary cell. BF occurs in the primary cell, and in one case, the network device may send a beam failure recovery response for the first cell to the UE on the target SS on the first secondary cell.

It may be appreciated that, for different cells in the third cell, the network device may send the radio link recovery response of the first cell to the UE on the same first resource of the different cells, respectively (the UE may receive the radio link recovery response of the first cell from the network device on the same first resource of the different cells); the network device may also send a radio link recovery response of the first cell to the UE on different first resources of different cells, respectively (the UE may receive the radio link recovery response of the first cell from the network device on different first resources of different cells).

The target event is BF, the first cell is a primary cell, the second cell is a primary cell, the first secondary cell and the second secondary cell, and the third cell is a primary cell and the first secondary cell. The primary cell generates BF, in one case, the network device may send a beam failure recovery response of the first cell to the UE on a target CORESET of the primary cell, and simultaneously the network device sends a beam failure recovery response of the first cell to the UE on the target CORESET of the first secondary cell; in another case, the network device may send the beam failure recovery response of the first cell to the UE on the target core of the primary cell, while the network device sends the beam failure recovery response of the first cell to the UE on the target search space of the first secondary cell.

In the embodiment of the present invention, the first resource may also be other feasible resources, and the embodiment of the present invention is not limited.

In the embodiment of the invention, a plurality of first resources are provided, which is beneficial to quickly realizing wireless link recovery.

Optionally, in the embodiment of the present invention, in a case where the first resource includes the target CORESET, the target CORESET is CORESET (denoted as case 1) for recovering the radio link of the first cell; and/or, in the case that the first resource comprises the target search space, the target search space is a search space for recovering the radio link of the first cell (denoted as case 2).

It will be understood that in the embodiment of the present invention, the above case 1 and case 2 may be satisfied at the same time or may not be satisfied at the same time, and the embodiment of the present invention is not limited.

For case 1 above:

illustratively, where the first cell includes a primary cell, the target CORESET is a CORESET for recovering the radio link of the primary cell, or a CORESET for recovering the radio links of the primary cell and the first secondary cell.

Illustratively, in the case where the first cell includes a first secondary cell, the target CORESET is a CORESET for recovering the radio link of the first secondary cell, or is a CORESET for recovering the radio links of the primary cell and the first secondary cell.

It will be appreciated that in the embodiment of the present invention, where the first resource includes the target CORESET, the target CORESET may be used for other functions in addition to recovering the radio link of the first cell.

For case 2 above:

the target search space is, for example, a search space for recovering a radio link of the primary cell, or a search space for recovering a radio link of the primary cell and the first secondary cell, in case the first cell comprises the primary cell.

The target search space is, for example, a search space for recovering a radio link of the first secondary cell, or a search space for recovering a radio link of the primary cell and the first secondary cell, in case the first cell includes the first secondary cell.

It will be appreciated that in the embodiment of the present invention, where the first resource includes the target search space, the target search space may be used for other functions in addition to the search space for recovering the radio link of the first cell.

In the embodiment of the present invention, the target CORESET is CORESET for recovering the radio link of the first cell; and/or the target search space is a search space for recovering the radio link of the first cell, so that the radio link recovery can be better and quickly realized.

Optionally, in an embodiment of the present invention, in a case where the first resource includes the target CORESET, the target CORESET associates with at least one search space.

Illustratively, the foregoing step 209a may be specifically implemented by the following step 209 b; the above step 210a may be specifically implemented by the following step 210 b.

Step 209b, the network device sends a radio link recovery response of the first cell to the UE over at least one search space associated with the target CORESET.

Step 210b, the UE receives a radio link recovery response of the first cell from the network device over at least one search space associated with the target CORESET.

Optionally, in an embodiment of the present invention, the at least one search space is the target search space.

It will be appreciated that based on steps 209 b-210 b described above, the target CORESET may be a CORESET dedicated to the radio link of the first cell, or a CORESET not dedicated to the radio link of the first cell; the at least one search space may be a search space dedicated to the radio link of the first cell or may be a search space not dedicated to the radio link of the first cell; the target search space may be a search space dedicated to the radio link of the first cell or may be a search space not dedicated to the radio link of the first cell.

In the embodiment of the invention, the network equipment sends the wireless link recovery response of the first cell to the UE in at least one search space associated with the target CORESET, so that the wireless link recovery can be better and faster realized.

Optionally, in the embodiment of the present invention, the radio link recovery response of the first cell is carried on a PDCCH scrambled by the target radio network temporary identifier (Radio Network Temporary Identifier, RNTI).

Further alternatively, in an embodiment of the present invention, the target RNTI is a cell-RNTI (C-RNTI) or an RNTI for recovering a radio link of the first cell (may be referred to as a radio link recovery RNTI).

Optionally, in the embodiment of the present invention, in the case that the first bearer is the target MAC CE, the hybrid automatic repeat request (Hybrid Automatic Repeat reQuest, HARQ) process number (i.e., HARQ Process number, HPN) in the PDCCH scrambled by the target RNTI is the same as the HPN corresponding to the target MAC CE.

Optionally, in the embodiment of the present invention, the PDCCH scrambled by the target RNTI schedules uplink transmission.

Optionally, in the embodiment of the present invention, the NDI of the PDCCH scrambled by the target RNTI is flipped.

Optionally, in an embodiment of the present invention, the radio link recovery response of the first cell is a random access response message (Random Access Response, RAR).

It can be understood that, in the case where the first bearer is at least one of the target RACH, the target MAC CE, and the target SR, the radio link recovery response of the first cell is RAR.

Optionally, in the embodiment of the present invention, in the case that the first carrier is the target RACH, the radio link recovery response of the first cell is RAR.

Optionally, in the embodiment of the present invention, the radio link recovery response of the first cell may also be in other forms or content, and the embodiment of the present invention is not limited.

Illustratively, the UE monitoring the network device response may include at least one of:

1. the network device response (C-RNTI PDCCH or RAR) is monitored on a Scheduling Scell. For example, C-RNTI PDCCH is monitored on a Scheduling Scell when a Pcell is BF.

2. The network device response (C-RNTI PDCCH or RAR) is monitored on the Pcell CSS or Pcell BFR SS. For example, C-RNTI PDCCH or RAR is monitored on Pcell CSS or BFR SS when BF occurs in Scheduling Scell. Further, C-RNTI PDCCH is monitored on Pcell CSS#3 or CSS#1 or BFR SS; alternatively, RAR is monitored on Pcell CSS#1.

3. The network device response (C-RNTI PDCCH or RAR) is monitored on the other scells.

4. Network device responses (C-RNTI PDCCH or RAR) were monitored on Scheduling Scell and Pcell. Specifically, the UE receives network equipment responses from both the Scheduling Scell and the Pcell, and considers BFR to be successful; alternatively, the UE receives a network device response from at least one of the Scheduling Scell and the Pcell, considering the BFR as successful.

The following is an exemplary description taking the form of a radio link recovery response of the first cell as C-RNTI PDCCH, the target event as BF, the primary cell as Pcell, and the first secondary cell as Scheduling Scell. Assuming that a BFR SS is configured for the Pcell of the UE, an SS is configured for the Scheduling Scell, and an SS is configured for the PUCCH Scell (indicating the second secondary cell) of the UE. The UE receives C-RNTI PDCCH from the network device, indicating that the BFR was successful. Further, the UE receives C-RNTI PDCCH from at least one of the second cells (the third cell), indicating that the BFR was successful.

Example a, UE receives the corresponding C-RNTI PDCCH from Pcell, scheduling Scell, PUCCH Scell, and considers BFR successful.

Example b, UE receives the corresponding C-RNTI PDCCH from both serving cells (two of Pcell, scheduling Scell, PUCCH Scell) to consider BFR successful. For example, BFR is considered successful when both the BFR SS of the Pcell and a certain SS on the Scheduling Scell (either a particular search space (UE-specific search space, USS) or BFR SS configured for the Scheduling Scell) receive C-RNTI PDCCH, respectively.

And C, receiving the corresponding C-RNTI PDCCH from any serving cell by the UE, and considering that BFR is successful.

For example C, the UE considers the BFR to be successful if, for example, C-RNTI PDCCH is received in some common search space of the Pcell. For example, if C-RNTI PDCCH is received in the Pcell BFR SS, the UE considers the BFR to be successful. For example, the UE considers BFR successful if the corresponding C-RNTI PDCCH is received in the Scheduling Scell.

In the embodiment of the invention, the radio link recovery response of the first cell is provided in the form of the PDCCH scrambled by the target RNTI, or the radio link recovery response of the first cell is provided in the form of the RAR, so that the radio link recovery can be better and faster realized according to the actual use requirement.

Optionally, in the embodiment of the present invention, before the step 210, the method for recovering a radio link provided in the embodiment of the present invention may further include the following step 211.

Step 211, the UE acquires second target configuration information.

Wherein the second target configuration information is used to recover the radio link of the first cell.

Optionally, in the embodiment of the present invention, the second target configuration information may be dedicated to recovering the radio link of the first cell; the second target configuration information may also be used for both restoring the radio link of the first cell and for other scheduling than restoring the radio link of the first cell.

It will be appreciated that configuration information for the second target is used to both restore the radio link of the first cell and to schedule other than to restore the radio link of the first cell: in one possible scenario, the second target configuration information may be used for both restoring the radio link of the first cell and for other scheduling. In another possible case, the second target configuration information includes configuration information for recovering the radio link of the first cell, and further includes configuration information for other scheduling.

In the embodiment of the invention, after the UE acquires the second target configuration information, the wireless link recovery response of the first cell can be received from the network equipment on the second cell according to the second target configuration information, so that the wireless link recovery can be better and faster realized.

Optionally, the second target configuration information may be determined by the UE itself, or may be preconfigured by the network device for the UE, or may be specified by a protocol, or may be other feasibility conditions, and may be specifically determined according to an actual use requirement, which is not limited by the embodiment of the present invention.

For example, in the case where the second target configuration information is that the network device is preconfigured for the UE, before the step 211, the radio link recovery method provided by the embodiment of the present invention may further include the following step 212; the above step 211 may be specifically realized by the following step 211 a.

Step 212, the network device sends second target configuration information to the UE.

Step 211a, the UE receives second target configuration information from the network device.

In the embodiment of the present invention, the cell in which the second target configuration information is obtained in the cell of the UE and the first cell may be the same or different (i.e., the second target configuration information is used for radio link recovery of the first cell, but the cell in which the second target configuration information is obtained may be the first cell or other cells except the first cell), which is not limited by the embodiment of the present invention. For example, the network device issues second target configuration information at cell C, where the second target configuration information is used for a response procedure in a radio link recovery procedure of cell B.

Alternatively, in the embodiment of the present invention, the above step 209 may be specifically implemented by the following step 209 c; the above step 210 may be specifically implemented by the following step 210 c.

Step 209c, the network device sends a radio link recovery response of the first cell to the UE on the third cell according to the second target configuration information.

Step 210c, the UE receives, on the third cell, a radio link recovery response of the first cell from the network device according to the second target configuration information.

In the embodiment of the invention, the UE receives the wireless link recovery response of the first cell from the network equipment on the second cell according to the second target configuration information, so that the wireless link recovery can be better and faster realized.

Optionally, based on step 211 above, the second target configuration information includes at least one (one or more of): the configuration information related to the primary cell, the configuration information related to the first secondary cell, and the configuration information related to the combination of the primary cell and the first secondary cell.

Optionally, based on step 211a above, the second target configuration information includes at least one (one or more of) the following: the network equipment is configured for the UE, the network equipment is configured for the UE configured configuration information related to the primary cell, the network equipment is configured for the UE configured configuration information related to the first secondary cell, and the network equipment is configured for the UE configured configuration information related to the combination of the primary cell and the first secondary cell.

Optionally, in an embodiment of the present invention, each configuration information in the second target configuration information includes at least one of the following: CORESET of the corresponding cell, the search space of the corresponding cell.

Illustratively, if the second target configuration information includes configuration information related to the primary cell, the configuration information related to the primary cell includes at least one of: CORESET of the primary cell, search space of the primary cell. If the second target configuration information includes configuration information related to the first secondary cell, the configuration information related to the first secondary cell includes at least one of: CORESET of the first secondary cell, search space of the first secondary cell. If the second target configuration information includes configuration information related to the primary cell and the first secondary cell in a combined manner, the configuration information related to the primary cell and the first secondary cell in a combined manner includes at least one of the following: CORESET of the primary cell and the first secondary cell, search space of the primary cell and the first secondary cell.

In the embodiment of the invention, the possibility of multiple second target configuration information is provided, and the second target configuration information can be determined according to the actual use requirement, so that the wireless link recovery can be better and quickly realized.

Further optionally, in an embodiment of the present invention, the second target configuration information is used to transmit a PDCCH for scheduling transmissions on the corresponding cell.

It is understood that the second target configuration information may be used to transmit a PDCCH that schedules transmissions on the corresponding cell, in addition to recovering the radio link of the first cell.

For example, if the second target configuration information includes configuration information related to the primary cell, the configuration information related to the primary cell may be used to transmit a PDCCH that schedules transmissions on the primary cell. If the second target configuration information includes configuration information related to the first secondary cell, the configuration information related to the first secondary cell may be used for transmitting and scheduling a PDCCH transmitted on the first secondary cell. If the second target configuration information includes configuration information related to the second secondary cell, the configuration information related to the second secondary cell may be used to transmit a PDCCH for scheduling transmissions on the second secondary cell. If the second target configuration information includes configuration information related to the primary cell and the first secondary cell in a combined manner, the configuration information related to the primary cell and the first secondary cell in a combined manner may be used for transmitting and scheduling a PDCCH transmitted on the primary cell and the first secondary cell.

In the embodiment of the present invention, at least one of CORESET of the corresponding cell and the search space of the corresponding cell may be referred to as a control related resource of the corresponding cell, where the control related resource of the corresponding cell may be a resource dedicated for recovering the radio link of the first cell or may be a resource for transmitting and scheduling the PDCCH transmitted on the corresponding cell.

In the embodiment of the invention, the second target configuration information is used for transmitting and scheduling the PDCCH transmitted on the corresponding cell, so that the second configuration information can be used for recovering the wireless link of the first cell and can be used for other scheduling, thereby increasing the utilization rate of the second target configuration information.

Some schemes in three cases of the first cell being a primary cell, the first cell being a first secondary cell, the first cell being a primary cell and the first secondary cell are exemplarily described below. The target event is BF, the primary cell is Pcell, the first secondary cell is Scheduling Scell, the second secondary cell is PUCCH Scell, the BFR SS is a search space special for BFR, the BFR ORESET is a control resource set special for BFR, and the BFR RACH is a random access channel special for BFR.

Case one: pcell generation BF

Example 1 BFR based on RACH

Scheme 1, BFR RACH resources are configured on Pcell, BFR SS and BFR CORESET resources are not configured on Pcell

1. In case of BF occurrence in the Pcell, the UE sends a BFR request to the network device over the BFR RACH on the Pcell.

2. The network device sends C-RNTI PDCCH (i.e., BFR response) in some common search space of the Pcell.

Wherein the common search space may be at least one of type0/0A/1/2/3 CSS.

3. The UE considers that the Pcell BFR procedure ends successfully if C-RNTI PDCCH is received in some common search space of the Pcell.

Scheme 2, BFR RACH resource allocation on Pcell, BFR SS and BFR CORESET resource allocation on Scheduling Scell

1. The network device configures at least one of BFR SS and BFR core for Pcell BFR for Scheduling Scell.

2. In case of BF occurrence in the Pcell, the UE sends a BFR request to the network device over the BFR RACH on the Pcell.

3. The network device sends the C-RNTI PDCCH on the Scheduling Scell, specifically comprising at least one of the following:

(a) C-RNTI PDCCH is sent in BFR SS on Scheduling Scell;

(b) C-RNTI PDCCH is sent in at least one SS associated with BFR CORESET on a Scheduling Scell.

Further optionally, for 3 (b) above, the BFR CORESET is associated with and only the BFR SS (i.e., the at least one SS is a BFR SS).

4. The UE receives C-RNTI PDCCH and considers that the Pcell BFR flow is successfully ended, including at least one of the following:

(a) The UE receives C-RNTI PDCCH in BFR SS on Scheduling Scell, then considers that the Pcell BFR flow is successfully ended (based on the scheme of 3 (a)) above;

(b) And (3) if the UE receives C-RNTI PDCCH in at least one SS associated with BFR CORESET on the Scheduling Scell, the Pcell BFR process is considered to be successfully ended (based on the scheme of 3 (b)).

Further optionally, with respect to 4 (b) above, if C-RNTI PDCCH is received in the BFR SS associated with BFR CORESET (i.e., the at least one SS is a BFR SS), then the Pcell BFR procedure is deemed to have ended successfully.

Scheme 3, BFR RACH, BFR SS and BFR CORESET resources are all configured in Scheduling Scell

1. The network device configures a BFR RACH for a Scheduling Scell for Pcell BFR and configures at least one of a BFR SS and a BFR CORESET for Pcell BFR for Scheduling Scell.

2. In case of BF occurrence in the Pcell, the UE sends a BFR request to the network device over the BFR RACH on the Scheduling Scell.

3. The network device sends C-RNTI PDCCH on a Scheduling Scell, including at least one of:

(a) C-RNTI PDCCH is sent in BFR SS on Scheduling Scell.

Further optionally, for 3 (b) above, the BFR CORESET is associated with and only the BFR SS.

(a) C-RNTI PDCCH is received in BFR SS on Scheduling Scell, then the Pcell BFR flow is considered to end successfully (based on the scheme of 3 (a) above);

(b) C-RNTI PDCCH is received in at least one SS associated with BFR CORESET on the Scheduling Scell, then the Pcell BFR procedure is considered to end successfully (based on the scheme of 3 (b) above).

Further optionally, with respect to 4 (b) above, if C-RNTI PDCCH is received in the BFR SS associated with BFR CORESET (i.e., at least one SS is a BFR SS), then the Pcell BFR procedure is considered to end successfully.

Example 2 BFR based on MAC CE

Scheme 4, introducing dedicated SR and MAC CE, or reusing Scell BFR SR and Scell BFRMAC CE in Rel-16 for Pcell BFR

1. The network device configures one or more SR resources for the Pcell BFR.

(a) For example, the network device configures an SR resource ID for the UE, where the SR resource corresponding to the ID may be used for the Pcell BFR procedure.

(b) Optionally, at least one of the Pcell, scheduling Scell, and PUCCH Scell, SR resources including the above-described for Pcell BFR are configured.

(c) Alternatively, the SR resource is an SR resource dedicated to Pcell BFR (abbreviated as Pcell BFR SR), or an SR resource dedicated to Pcell and Scheduling Scell BFR.

(d) Optionally, the SR is an SR resource for any secondary cell (Scell) BFR. The SR is Scell BFR SR, which in the embodiment of the present invention may be used in Scheduling Scell BFR or Pcell BFR.

2. Under the condition that the Pcell generates BF, (a) if the UE has uplink resources, the UE sends BFR request to the network equipment through BFR MAC CE on the uplink resources; (b) Otherwise (if the UE does not have uplink resources), the UE sends an SR to the network device for the BFR procedure.

3. For the scheme of 2 (b), if the UE sends a Pcell BFR SR, the network device receives the SR and knows that BF has occurred in the Pcell, so that UL grant is sent on other Serving cells except the Pcell, and then the UE sends a BFR request to the network device through BFR MAC CE on the uplink resources allocated by the UL grant.

If the UE sends a Scell BFR SR, the network device receives the SR and knows that BF has occurred in a certain cell or cells (but it is not clear which cell or cells have BF specifically occurred), and the network device sends a UL grant on a Serving cell other than the Pcell and the Scheduling Scell, and then the UE sends a BFR request to the network device through the BFR MAC CE on the uplink resources allocated by the UL grant.

4. Optionally, the UL grant is transmitted on a Scheduling Scell.

5. Optionally, the above-mentioned BFR MAC CE (dedicated MAC CE or Scell BFR MAC CE) is associated with a Pcell.

(a) Optionally, the BFR MAC CE carries a Pcell index, or the BFR MAC CE carries a special value (the special value is used to indicate a Pcell).

(b) Optionally, scheduling Scell index is carried in the BFR MAC CE.

(c) Optionally, a MAC CE dedicated to Pcell BFR is designed, where in the presence of candidate beam, at least one of candidate beam index and indication information indicating that UE detects candidate beam may be carried in the MAC CE; in the case where there is no candidate beam, the MAC CE may carry indication information indicating that the UE does not detect candidate beam.

6. After receiving the BFR MAC CE, the network device may know that BF has occurred and send C-RNTI PDCCH.

7. And if the UE receives C-RNTI PDCCH, the Pcell BFR flow is considered to be successfully ended.

Example 3 BFR based on SR

Scheme 5, introducing a dedicated SR for Pcell BFR

1. The network device configures one or more SR resources for the Pcell BFR.

(d) Optionally, each SR resource in the at least one SR resource has an association relationship with at least one candidate beam (RS).

(e) Optionally, at least one of the SR resources indicates that the UE does not detect candidate beam (RS), or does not associate candidate beam (RS).

2. In case of BF occurrence in the Pcell, the UE transmits a BFR request to the network device through the SR.

(a) Optionally, the UE selects at least one candidate beam (RS), and then sends a BFR request to the network device through an SR corresponding to the at least one candidate beam (RS).

For example, the UE evaluates candidate beam SSB and SSB2, where SSB1 evaluation results meet a threshold, and the UE sends a BFR request to the network device through the SR corresponding to SSB 1.

(b) Optionally, the at least one SR resource indicates that the UE does not detect candidate beam (RS), or does not associate candidate beam (RS).

For example, neither evaluated candidate beam meets the requirements, or the UE does not have candidate beam, then a BFR request is sent to the network device over the SR.

3. After receiving the SR, the network device can know that the Pcell has BF and transmits C-RNTI PDCCH.

4. And if the UE receives C-RNTI PDCCH, the Pcell BFR flow is considered to be successfully ended.

And a second case: scheduling Scell occurrence BF

Example 4 BFR based on RACH

Scheme 6 BFR RACH is configured on Scheduling Scell, BFR SS and BFR CORESET resources are both configured on Pcell (or Scheduling Scell)

1. The network device configures a BFR RACH for Scheduling Scell BFR for the Scheduling Scell and configures at least one of a BFR SS and a BFR core for Scheduling Scell BFR for the Pcell (or Scheduling Scell).

2. In case of BF occurrence in the Scheduling Scell, the UE sends a BFR request to the network device over the BFR RACH on the Scheduling Scell.

3. The network device sends the C-RNTI PDCCH on the Pcell (or Scheduling Scell), specifically including at least one of the following:

(a) Transmitting C-RNTI PDCCH in BFR SS on Pcell (or Scheduling Scell);

(b) C-RNTI PDCCH is sent in at least one SS associated with BFR CORESET on a Pcell (or Scheduling Scell).

4. The UE considers Scheduling Scell BFR that the procedure is successfully completed when receiving C-RNTI PDCCH, including at least one of the following:

(a) The UE receives C-RNTI PDCCH in BFR SS on Pcell (or Scheduling Scell), then the Scheduling Scell BFR flow is considered to end successfully (based on the scheme of 3 (a)) above;

(b) The UE receives C-RNTI PDCCH in at least one SS associated with BFR CORESET on Pcell (or Scheduling Scell), then the Scheduling Scell BFR flow is deemed to end successfully (based on the scheme of 3 (b) above).

Further optionally, for 4 (b) above, receipt of C-RNTI PDCCH in the BFR SS associated with BFR CORESET (i.e., the at least one SS is a BFR SS) considers Scheduling Scell BFR flow successfully completed.

Example 5 BFR based on MAC CE

Scheme 7, introducing dedicated SR and MAC CE, or reusing Scell BFR SR and Scell BFR MAC CE of Rel-16 for Scheduling Scell BFR

1. The network device configures one or more SR resources for Scheduling Scell BFR.

(a) For example, the network device configures an SR resource ID for the UE, and the SR resource corresponding to the ID may be used for the Scheduling Scell BFR flow.

(b) Optionally, at least one of the Pcell, scheduling Scell, and PUCCH Scell is configured to include the SR resources for Scheduling Scell BFR described above.

(c) Alternatively, the SR is an SR resource dedicated to Scheduling Scell BFR (abbreviated as Scheduling Scell BFR SR) or an SR resource dedicated to Pcell and Scheduling Scell BFR.

(d) Optionally, the SR is an SR resource for Serving cell BFR. The SR is Scell BFR SR, which in the embodiment of the present invention may be used in Scheduling Scell BFR or Pcell BFR.

2. Under the condition that the Scheduling Scell generates BF, (a) if the UE has uplink resources, the UE sends BFR request to the network equipment through BFR MAC CE on the uplink resources; (b) Otherwise (if the UE does not have uplink resources), the UE sends an SR for the BFR procedure.

3. For the scheme of 2 (b) above, if the UE sends Scheduling Scell BFR SR, the network device receives that the SR may know that the Scheduling Scell has BF, so that UL grant is sent on other Serving cells except for the Scheduling Scell, and then the UE sends a BFR request to the network device through the BFR MAC CE on the uplink resource allocated by the UL grant.

4. Alternatively, the UL grant is transmitted on a Pcell.

5. Optionally, the above-mentioned BFR MAC CE (dedicated MAC CE or Scell BFR MAC CE) is associated with a Scheduling Scell.

(a) Optionally, scheduling Scell index is carried in the BFR MAC CE, or a special value (special value is used to indicate a Scheduling Scell) is carried in the BFR MAC CE.

(b) Optionally, the BFR MAC CE carries a Pcell index.

(c) Optionally, a special MAC CE is designed for Scheduling Scell BFR, where there is a candidate beam, at least one of candidate beam index and indication information indicating that the UE detects a candidate beam may be carried in the MAC CE; in the case where there is no candidate beam, the MAC CE may carry indication information indicating that the UE does not detect candidate beam.

6. The network device, upon receiving Scheduling Scell MAC CE, knows that BF has occurred and transmits C-RNTI PDCCH.

7. The UE receives C-RNTI PDCCH, and considers Scheduling Scell BFR that the procedure is successfully ended.

Example 6 BFR based on SR

Scheme 8, introducing a dedicated SR for Scheduling Scell BFR

(c) Alternatively, the SR resource is an SR resource dedicated to Scheduling Scell BFR (abbreviated as Scheduling Scell BFR SR), or an SR resource dedicated to Pcell and Scheduling Scell BFR.

2. In case of BF occurrence in Scheduling Scell, the UE sends a BFR request to the network device through SR.

3. After receiving the SR, the network device can know that the Scheduling Scell has BF, and sends C-RNTI PDCCH.

4. The UE receives C-RNTI PDCCH, and considers Scheduling Scell BFR that the procedure is successfully ended.

Case three, pcell and Scheduling Scell generating BF

Example 7 BFR based on RACH

Scheme 9,

1. The network device configures a BFR RACH for Pcell and Scheduling Scell BFR and configures at least one of a BFR SS and a BFR CORESET for Pcell and Scheduling Scell BFR for Pcell.

2. In case BF occurs for Pcell and Scheduling Scell, the UE sends a BFR request to the network device over the BFR RACH on the Pcell Scell.

3. The network device sends C-RNTI PDCCH in the BFR SS on the Pcell scell.

4. And if the UE receives C-RNTI PDCCH in the BFR SS, the Pcell and Scheduling Scell BFR flow are considered to be successfully ended.

Scheme 10,

1. The network device configures a BFR RACH for Scheduling Scell for Pcell and Scheduling Scell BFR and configures at least one of a BFR SS and a BFR CORESET for Scheduling Scell for Pcell and Scheduling Scell BFR.

2. In case BF occurs for Pcell and Scheduling Scell, the UE sends a BFR request to the network device over the BFR RACH on the Scheduling Scell.

3. The network device sends C-RNTI PDCCH in the BFR SS on the Scheduling Scell.

Example 8 BFR based on MAC CE

Scheme 11, introducing dedicated SR and MAC CE, or reusing Scell BFR SR and Scell BFR MAC CE of Rel-16 for Pcells and Scheduling Scell BFR

1. The network device configures one or more SR resources for the Pcell and Scheduling Scell BFR.

(a) For example, the network device configures an SR resource ID for the UE, where the SR resource corresponding to the ID may be used for Pcell and Scheduling Scell BFR flows.

(b) Optionally, at least one of the Pcell, scheduling Scell, PUCCH Scell, SR resources for Pcell and Scheduling Scell BFR described above are configured.

(c) When the Pcell and the Scheduling Scell generate BF, (a) if the UE has an uplink resource, the UE transmits a BFR request to the network device through the BFR MAC CE on the uplink resource; (b) Otherwise (if the UE does not have uplink resources), the UE sends an SR for the BFR procedure.

3. For the scheme of 2 (b) above, if the UE sends an SR corresponding to Pcell and Scheduling Scell BFR, the network device receives the SR and knows that BF has occurred in Pcell and Scheduling Scell, so that UL grant is sent in other serving cells except Pcell and Scheduling Scell, and then the UE sends a BFR request to the network device through BFR MAC CE on the uplink resources allocated by the UL grant.

4. Optionally, the above-mentioned BFR MAC CE (dedicated MAC CE or Scell BFR MAC CE) is associated with Pcell and Scheduling Scell.

(a) Optionally, the MAC CE carries a special value, where the special value corresponds to Pcell and Scheduling Scell.

(b) Optionally, the MAC CE carries a cell index of the Pcell and a Scheduling Scell.

(c) Optionally, a MAC CE dedicated to Pcell and Scheduling Scell BFR is designed, where there is a candidate beam, at least one of candidate beam index and indication information indicating that the UE detects a candidate beam may be carried in the MAC CE; in the case where there is no candidate beam, the MAC CE may carry indication information indicating that the UE does not detect candidate beam.

6. The network device, upon receiving the MAC CE, can know that BF has occurred and transmit C-RNTI PDCCH.

7. The UE receives C-RNTI PDCCH, and considers that the Pcell and Scheduling Scell BFR flows end successfully.

Example 9 BFR based on SR

Scheme 12, introducing dedicated SR for Pcells and Scheduling Scell BFR

(c) Alternatively, the SR described above is an SR resource dedicated to Pcell and scheduling Scell BFR.

2. In case BF occurs in Pcell and Scheduling Scell, the UE sends a BFR request to the network device through SR.

For example, the UE evaluates candidate beam SSB and SSB2, where the SSB1 evaluation results meet a threshold, the UE sends an SR corresponding to SSB1, and sends a BFR request to the network device.

3. After receiving the SR, the network device can know that BF has occurred in the Pcell and the Scheduling Scell, and transmits C-RNTI PDCCH.

4. The UE receives C-RNTI PDCCH, and considers that the Pcell and Scheduling Scell BFR flows end successfully.

It should be noted that each of the steps in examples 1 to 9 is optional, and may be specifically determined according to practical situations, and the embodiment of the present invention is not limited.

Optionally, in the embodiment of the present invention, before the step 201, the radio link recovery method provided in the embodiment of the present invention may further include the following step 213.

Step 213, the UE acquires the target detection resource.

Wherein the target detection resource is used to evaluate or measure a beam if the target event is BF, and is used to evaluate or measure a radio link if the target event is RLF.

In the embodiment of the invention, after the UE acquires the target detection resource, the UE can detect according to the target detection resource and determine whether to send the indication information for indicating the target event to the higher layer according to the detection result.

Optionally, in the embodiment of the present invention, the target detection resource may be determined by the UE itself, or may be preconfigured by the network device for the UE, or may be specified by a protocol, or may be other feasible situations, and may specifically be determined according to actual use requirements, which is not limited by the embodiment of the present invention.

Optionally, in the case that the target detection resource is preconfigured by the network device for the UE, before step 213, the radio link recovery method provided by the embodiment of the present invention may further include the following step 214; the above step 213 may be specifically implemented by the following step 213 a.

Step 214, the network device sends the target detection resource to the UE.

Step 213a, the UE receives the target detection resources from the network device.

Optionally, after the step 213 or the step 213a, the radio link recovery method provided in the embodiment of the present invention may further include the following step 215.

Step 215, if the measurement result of the target detection resource meets the target condition, the physical layer of the UE sends the target indication information to the higher layer of the UE.

The target indication information is used for indicating the target event; the target detection resource is used to evaluate or measure a beam in case the target event is BF and to evaluate or measure a radio link in case the target event is RLF.

It may be understood that in the embodiment of the present invention, after the UE acquires the target detection resource in the case where the target event is BF, the UE evaluates (or measures) the quality or intensity of the beam of the first cell according to the target detection resource, and then, in the case where the measurement result meets the target condition, the physical layer of the UE sends target indication information indicating the target event to a higher layer of the UE.

It may be understood that in the embodiment of the present invention, after the UE acquires the target detection resource in the case where the target event is RLF, the UE evaluates (or measures) the quality or strength of the radio link of the first cell according to the target detection resource, and then, in the case where the measurement result meets the target condition, the physical layer of the UE sends target indication information indicating the target event to a higher layer of the UE.

In the embodiment of the invention, the UE determines whether to send the target indication information for indicating the target event to the higher layer according to the measurement result of the target detection resource, and then the higher layer of the UE can judge whether the target event occurs in the first cell according to the target indication information, thereby realizing the recovery of the wireless link in time.

Optionally, in an embodiment of the present invention, the target detection resource includes at least one of: the first detection resource configured for the primary cell is the second detection resource configured for the first secondary cell.

It may be appreciated that the first detection resource may include at least one detection resource, and the second detection resource may also include at least one detection resource, which is specifically determined according to actual usage requirements, which is not limited by the embodiment of the present invention.

It may be understood that in the embodiment of the present invention, the target detection resource may be a first detection resource configured for the primary cell, or may be a second detection resource configured for the first secondary cell, or may be a first detection resource configured for the primary cell and a second detection resource configured for the first secondary cell. The target detection resource may also be other feasible resources, which are not limited in the embodiment of the present invention.

It may be understood that in the embodiment of the present invention, in the case that the target detection resource is a first detection resource configured for the primary cell and a second detection resource configured for the first secondary cell, the first detection resource and the second detection resource may be jointly detected or estimated, the first detection resource may be separately detected or estimated, the second detection resource may be separately detected or estimated, and specifically may be determined according to actual use requirements, which is not limited by the embodiment of the present invention.

Optionally, in an embodiment of the present invention, the target condition includes at least one of: in the case that the target detection resource includes a first detection resource, measurement results of X resources in the first detection resource are greater than or equal to a second threshold; in the case that the target detection resource includes a second detection resource, measurement results of Y resources in the second detection resource are greater than or equal to a third threshold; under the condition that the target detection resources comprise first detection resources and second detection resources, the measurement results of Z resources in the first detection resources and the second detection resources are larger than or equal to corresponding threshold values; x, Y, Z are all positive integers.

It may be understood that, in the embodiment of the present invention, in the case where the target detection resource is the first detection resource (i.e., the case where the first detection resource is detected or evaluated separately), the target condition is that the measurement results of the X resources in the first detection resource are greater than or equal to the second threshold. In the case where the target detection resource is the second detection resource (i.e., in the case where the second detection resource is detected or evaluated alone), the target condition is that the measurement results of Y resources in the second detection resource are greater than or equal to the third threshold. In the case that the target detection resources are the first detection resources and the second detection resources (i.e., the case of jointly detecting or evaluating the first detection resources and the second detection resources), the target condition is that measurement results of X resources in the first detection resources are greater than or equal to a second threshold, and measurement results of Y resources in the second detection resources are greater than or equal to a third threshold; or, the target condition is that the measurement results of the Z resources in the first detection resource and the second detection resource are greater than or equal to the corresponding threshold value.

When the measurement results of the Z resources in the first detection resource and the second detection resource are greater than or equal to the corresponding threshold, if the Z resources include the resources in the first detection resource (hereinafter referred to as the first resource), the corresponding threshold is the threshold corresponding to the first resource (for example, the second threshold), and if the Z resources include the resources in the second detection resource (hereinafter referred to as the second resource), the corresponding threshold is the threshold corresponding to the second resource (for example, the third threshold).

It should be noted that, the X resources in the first detection resource include: some or all of the first detection resources. Y resources in the second detection resources include: and the second detecting part or all of the resources. Z resources in the first detection resource and the second detection resource comprise part or all of the first detection resource and the second detection resource (specifically, part of the Z resources can belong to the first detection resource, the other part of the Z resources can belong to the second detection resource, all of the Z resources can also belong to the first detection resource, and all of the Z resources can also belong to the second detection resource).

In the embodiment of the present invention, the second threshold value and the third threshold value may be the same or different, and the embodiment of the present invention is not limited. The values of the second threshold and the third threshold can be determined according to actual use requirements, and the embodiment of the invention is not limited.

In the embodiment of the invention, various possible conditions of target detection resources are provided, and different target conditions are provided for different target detection resources, so that the required target detection resources and target conditions can be determined according to actual use requirements, and the wireless link recovery can be better and quickly realized.

Optionally, in the embodiment of the present invention, in a case where the target detection resource includes a first detection resource and a second detection resource, a transmission period of the target indication information is: the minimum of the detection period of the first detection resource and the detection period of the second detection resource.

It may be understood that, in the embodiment of the present invention, if the target detection resource includes a first detection resource and a second detection resource, if the detection period of the first detection resource is less than or equal to the detection period of the second detection resource, the transmission period of the target indication information is the detection period of the first detection resource; if the detection period of the first detection resource is greater than the detection period of the second detection resource, the sending period of the target indication information is the detection period of the second detection resource.

Illustratively, 2 synchronization signal blocks (Synchronization Signal and PBCH block, SSB) are configured on the Pcell for detecting BF, and 2 channel state information reference signals (Channel State Information Reference Signal, CSI-RS) are configured on the Scheduling Scell for detecting BF, with the minimum of the periods of these 2 SSB and 2 CSI-RS being the period of reporting BF indications.

Optionally, after the step 215, the radio link recovery method provided by the embodiment of the present invention may further include a step 216 described below.

Step 216, when the number of times of sending the target indication information to the higher layer is greater than or equal to the fourth threshold value within the preset duration, the UE determines that the target event occurs in the first cell.

It can be understood that in the embodiment of the present invention, when the number of times of sending the target indication information to the higher layer reaches the preset threshold value in a certain time content, the UE may determine that the first cell has the target event.

In the embodiment of the present invention, the fourth threshold may be determined according to actual use requirements, which is not limited by the embodiment of the present invention.

In the following, the target event is BF, the target detection resource is a first detection resource and/or a second detection resource (where the first detection resource and the second detection resource are BF detection resources, the first detection resource is Q failure Detection Resources configured on the Pcell, the second detection resource is P failure Detection Resources configured on the Scheduling Scell), the primary cell is the Pcell, the first secondary cell is the Scheduling Scell, and the target indication information is BF.

Example A

When the measurement results of the first detection resource and the second detection resource (all resources in the first detection resource) do not meet the corresponding threshold value, the physical layer of the UE sends BF indication to a high layer; further optionally, the UE determines that BF is occurring when the number of times the physical layer of the UE transmits BF indications to higher layers is greater than or equal to a fourth threshold.

If the first detection resource and the second detection resource are used for jointly evaluating (or measuring) the beams of the Pcell, when the measurement results (or evaluation quality) of Q failure Detection Resources are all lower than a second threshold and the measurement results (or evaluation quality) of P failure Detection Resources are all lower than a third threshold, the physical layer of the UE sends BF indication of the Pcell to a higher layer; after the BF indication of S Pcell is transmitted within the preset duration, the UE determines that BF occurs in the Pcell.

If the first detection resource and the second detection resource are used for jointly evaluating (or measuring) the beam of the Scheduling Scell, when the measurement results (or evaluation quality) of Q failure Detection Resources are all lower than a second threshold and the measurement results (or evaluation quality) of P failure Detection Resources are all lower than a third threshold, the physical layer of the UE sends BF indication of the Scheduling Scell to a higher layer; after the BF indication of the S Scheduling Scell is sent within the preset duration, the UE determines that the Scheduling Scell is BF.

If the first detection resource and the second detection resource are used for jointly evaluating (or measuring) beams of the Pcell and the Scheduling Scell, when the measurement results (or evaluation quality) of Q failure Detection Resources are all lower than a second threshold and the measurement results (or evaluation quality) of P failure Detection Resources are all lower than a third threshold, the physical layer of the UE sends BF indications of the Pcell and the Scheduling Scell to a higher layer; after transmitting BF indications for S Pcell and Scheduling Scell within a preset duration, the UE determines that BF occurs for Pcell and Scheduling Scell.

Example B

When the measurement result of any one of the first detection resource and the second detection resource (the first detection resource and/or the second detection resource) does not meet the corresponding threshold value, the physical layer of the UE sends BF indication to a higher layer; further optionally, the UE determines that BF is occurring when the number of times the physical layer of the UE transmits BF indications to higher layers is greater than or equal to a fourth threshold.

If the target detection resource is a first detection resource, the first detection resource is used for evaluating (or measuring) beams of the Pcell, and when the measurement results (or evaluation quality) of the Q failure Detection Resources are all lower than a second threshold, the physical layer of the UE sends BF instructions of the Pcell to a higher layer; after the BF indication of S Pcell is transmitted within the preset duration, the UE determines that BF occurs in the Pcell.

If the target detection resource is a first detection resource, the first detection resource is used for evaluating (or measuring) beams of the Scheduling Scell, and when the measurement results (or evaluation quality) of the Q failure Detection Resources are all lower than a second threshold, the physical layer of the UE sends BF indication of the Scheduling Scell to a higher layer; after the BF indication of the S Scheduling Scell is sent within the preset duration, the UE determines that the Scheduling Scell is BF.

If the target detection resource is a first detection resource, the first detection resource is used for evaluating (or measuring) beams of the Pcell and the Scheduling Scell, and when measurement results (or evaluation quality) of the Q failure Detection Resources are all lower than a second threshold, the physical layer of the UE sends BF indications of the Pcell and the Scheduling Scell to a higher layer; after transmitting BF indications for S Pcell and Scheduling Scell within a preset duration, the UE determines that BF occurs for Pcell and Scheduling Scell.

If the target detection resource is a second detection resource, the second detection resource is used for evaluating (or measuring) beams of the Pcell, and when the measurement results (or evaluation quality) of the P failure Detection Resources are all lower than a third threshold, the physical layer of the UE sends BF indication of the Pcell to a higher layer; after the BF indication of S Pcell is transmitted within the preset duration, the UE determines that BF occurs in the Pcell.

If the target detection resource is a second detection resource, the second detection resource is used for evaluating (or measuring) beams of the Scheduling Scell, and when measurement results (or evaluation quality) of the P failure Detection Resources are all lower than a third threshold, the physical layer of the UE sends BF indication of the Scheduling Scell to a higher layer; after the BF indication of the S Scheduling Scell is sent within the preset duration, the UE determines that the Scheduling Scell is BF.

If the target detection resource is a second detection resource, the second detection resource is used for evaluating (or measuring) beams of the Pcell and the Scheduling Scell, and when measurement results (or evaluation quality) of the P failure Detection Resources are all lower than a third threshold, the physical layer of the UE sends BF indications of the Pcell and the Scheduling Scell to a higher layer; after transmitting BF indications for S Pcell and Scheduling Scell within a preset duration, the UE determines that BF occurs for Pcell and Scheduling Scell.

As shown in fig. 4, an embodiment of the present invention provides a UE 300, which includes: the UE 300 includes: a transmitting module 301, wherein: a sending module 301, configured to send, if a target event occurs in a first cell of the UE 300, a radio link recovery request of the first cell to a network device on a second cell of the UE 300; wherein the first cell includes at least one of: a primary cell, a first secondary cell; the second cell includes at least one of: the primary cell, the first secondary cell, and the second secondary cell; the first auxiliary cell is an auxiliary cell for scheduling the main cell; the second secondary cell is a secondary cell other than the first secondary cell among the secondary cells of the UE 300; the target event is BF or RLF.

Optionally, the foregoing sending module 301 is specifically configured to: transmitting a radio link recovery request of the first cell to a network device through a first carrier on the second cell; wherein the first carrier comprises at least one of the following: target RACH, target scheduling request, target MAC CE.

Optionally, in the case that the first bearer includes the target scheduling request, the target scheduling request is at least one of N scheduling requests for recovering a radio link of the first cell, and N is a positive integer.

Optionally, each of the M scheduling requests in the N scheduling requests is associated with a candidate beam reference signal, where M is a positive integer less than or equal to N.

Optionally, the target scheduling request is determined based on a measurement result of candidate beam reference signals associated with each of the M scheduling requests.

Optionally, the target scheduling request is a scheduling request corresponding to the first candidate beam reference signal; wherein the first candidate beam reference signal is a candidate beam reference signal satisfying a predetermined condition.

Optionally, the predetermined condition includes any one of the following: the first candidate beam reference signal is a candidate beam reference signal with a measurement result greater than or equal to a first threshold value in candidate beam reference signals associated with the M scheduling requests; the first candidate beam reference signal is at least one of candidate beam reference signals associated with the M scheduling requests, and the index of the corresponding candidate beam is the smallest; the first candidate beam reference signal is at least one of candidate beam reference signals associated with the M scheduling requests, and the index of the corresponding candidate beam is the largest; the first candidate beam reference signal is at least one of candidate beam reference signals associated with the M scheduling requests, and an index of a corresponding candidate beam is closest to an index of a beam of the first cell.

Optionally, the target scheduling request is a scheduling request of an unassociated candidate beam reference signal; alternatively, the target scheduling request is a scheduling request in which the UE 300 does not detect the associated candidate beam reference signal.

Optionally, the foregoing sending module 301 is specifically configured to: if the first bearer includes the target MAC CE, if the second cell has a first uplink resource, a radio link recovery request of the first cell is transmitted to the network device through the target MAC CE on the first uplink resource.

Optionally, if the UE 300 detects a target candidate beam, at least one of the following is carried in the target MAC CE: the index of the target candidate beam, the first indication information; the first indication information is used to indicate whether the UE 300 detects the target candidate beam; or if the UE 300 does not detect the target candidate beam, the target MAC CE carries second indication information; the second indication information is used to indicate that the UE 300 does not detect the target candidate beam.

Optionally, the foregoing sending module 301 is further configured to: and transmitting a first scheduling request to the network device when the first bearer includes the target MAC CE.

Optionally, the first scheduling request satisfies any one of the following: and the scheduling request is used for recovering the wireless link of the first cell, and the scheduling request is used for recovering the wireless link of any auxiliary cell.

Optionally, if the UE 300 detects a target candidate beam, at least one of the first scheduling request and the target MAC CE carries at least one of the following: the index of the target candidate beam, the first indication information; the first indication information is used to indicate whether the UE 300 detects the target candidate beam; or, if the UE 300 does not detect the target candidate beam, at least one of the first scheduling request and the target MAC CE carries second indication information; the second indication information is used to indicate that the UE 300 does not detect the target candidate beam.

Optionally, the target MAC CE satisfies at least one of the following: the wireless link is used for recovering the first cell and carrying the target identifier; wherein the target identifier is used for indicating the first cell.

Optionally, the UE 300 further includes: an acquisition module 302, wherein: an obtaining module 302, configured to obtain first target configuration information; the first target configuration information is used for recovering the wireless link of the first cell.

Optionally, the foregoing sending module 301 is specifically configured to: and sending a radio link recovery request of the first cell to the network equipment on the second cell according to the first target configuration information.

Optionally, the first target configuration information includes at least one of: configuration information related to the primary cell, configuration information related to the first secondary cell, and configuration information related to the primary cell and the first secondary cell in a combined mode.

Optionally, each configuration information in the first target configuration information includes at least one of the following: RACH of the corresponding cell, and the scheduling request of the corresponding cell.

Optionally, the UE 300 further includes: a receiving module 303, wherein: a receiving module 303, configured to receive, on a third cell, a radio link recovery response of the first cell from the network device; the third cell is at least one cell of the second cells.

Optionally, the radio link recovery response of the first cell is carried on a PDCCH scrambled by the target RNTI.

Optionally, the target RNTI is a C-RNTI or an RNTI for recovering a radio link of the first cell.

Optionally, the radio link recovery response of the first cell is a random access response message RAR.

Optionally, the receiving module 303 is specifically configured to: receiving a radio link recovery response of the first cell from the network device on the first resource of the third cell; wherein the first resource includes at least one of: target CORESET, target search space, and the third cell includes a target common search space when the primary cell is.

Optionally, in the case that the first resource includes the target core, the target core is a core for recovering a radio link of the first cell; and/or, in the case that the first resource includes the target search space, the target search space is a search space for recovering a radio link of the first cell.

Optionally, the receiving module 303 is specifically configured to: a radio link recovery response of the first cell is received from the network device over at least one search space associated with the target CORESET.

Optionally, the at least one search space is the target search space.

Optionally, the acquiring module 302 is further configured to acquire second target configuration information; the second target configuration information is used for recovering the wireless link of the first cell.

Optionally, the receiving module 303 is specifically configured to: and receiving a radio link recovery response of the first cell from the network equipment on the third cell according to the second target configuration information.

Optionally, the second target configuration information includes at least one of: configuration information related to the primary cell, configuration information related to the first secondary cell, and configuration information related to the primary cell and the first secondary cell in a combined mode.

Optionally, each configuration information in the second target configuration information includes at least one of the following: CORESET of the corresponding cell, the search space of the corresponding cell.

Optionally, the second target configuration information is used for transmitting and scheduling the PDCCH transmitted on the corresponding cell.

Optionally, the foregoing sending module 301 is further configured to: in case that the measurement result of the target detection resource satisfies the target condition, the physical layer of the UE 300 transmits target indication information to a higher layer of the UE 300; the target indication information is used for indicating the target event.

Optionally, the target detection resource includes at least one of: and the first detection resource configured for the primary cell is the second detection resource configured for the first secondary cell.

Optionally, the target condition includes a first condition or a second condition; wherein the first condition includes at least one of: in the case that the target detection resources include the first detection resources, measurement results of X resources in the first detection resources are greater than or equal to a second threshold; in the case that the target detection resource includes the second detection resource, measurement results of Y resources in the second detection resource are greater than or equal to a third threshold; the second condition is as follows: when the target detection resource includes the first detection resource and the second detection resource, measurement results of Z resources in the first detection resource and the second detection resource are greater than or equal to a corresponding threshold; x, Y, Z are all positive integers.

Optionally, in the case where the target detection resource includes the first detection resource and the second detection resource, the transmission period of the target indication information is: and the minimum value of the detection period of the first detection resource and the detection period of the second detection resource.

It should be noted that, as shown in fig. 4, modules that are necessarily included in the UE 300 are illustrated by solid line boxes, such as a transmitting module 301; the modules that may or may not be included in the UE 300 are illustrated with dashed boxes, such as the acquisition module 302 and the receiving module 303.

The UE provided in the embodiment of the present invention can implement each process shown in the foregoing embodiment, and in order to avoid repetition, details are not repeated here.

The UE provided in the embodiment of the present invention, if a first cell of the UE (including at least one of the primary cell and a first secondary cell (secondary cell scheduling the primary cell)) generates a target event (BF or RLF), sends a radio link recovery request of the first cell to a network device in a second cell of the UE (including at least one of the primary cell, the first secondary cell and a second secondary cell (secondary cells other than the first secondary cell among the secondary cells of the UE)). By means of the scheme, when the target event occurs in the first cell, a radio link recovery request of the first cell can be sent to the network equipment on the second cell (the network equipment can know that the target event occurs in the first cell after receiving the radio link recovery request of the first cell and then further trigger the radio link recovery of the first cell), so that under the condition that the secondary cell schedules the primary cell, if BF or RLF occurs in the primary cell or BF or RLF occurs in the secondary cell, the radio link recovery can be rapidly achieved.

Fig. 5 is a schematic diagram of a hardware architecture of a UE implementing various embodiments of the present invention, where the UE 400 includes, but is not limited to: radio frequency unit 401, network module 402, audio output unit 403, input unit 404, sensor 405, display unit 406, user input unit 407, interface unit 408, memory 409, processor 410, and power source 411. Those skilled in the art will appreciate that the structure of the UE 400 shown in fig. 5 is not limiting of the UE, and the UE 400 may include more or fewer components than shown, or may combine certain components, or a different arrangement of components. In an embodiment of the present invention, the UE 400 includes, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted UE, a wearable device, a pedometer, and the like.

The radio frequency unit 401 is configured to send, to the network device, a radio link recovery request of a first cell of the UE, on a second cell of the UE, if the first cell of the UE has a target event; wherein the first cell includes at least one of: a primary cell, a first secondary cell; the second cell includes at least one of: the primary cell, the first secondary cell, and the second secondary cell; the first auxiliary cell is an auxiliary cell for scheduling the main cell; the second auxiliary cell is an auxiliary cell except the first auxiliary cell in the auxiliary cells of the UE; the target event is BF or RLF.

It should be understood that, in the embodiment of the present invention, the radio frequency unit 401 may be used for receiving and transmitting signals during the process of receiving and transmitting information or communication, specifically, receiving downlink data from a base station and then processing the received downlink data by the processor 410; and, the uplink data is transmitted to the base station. Typically, the radio frequency unit 401 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. In addition, the radio frequency unit 401 may also communicate with networks and other devices through a wireless communication system.

The UE 400 provides wireless broadband internet access to the user through the network module 402, such as helping the user to email, browse web pages, access streaming media, and the like.

The audio output unit 403 may convert audio data received by the radio frequency unit 401 or the network module 402 or stored in the memory 409 into an audio signal and output as sound. Also, the audio output unit 403 may also provide audio output (e.g., a call signal reception sound, a message reception sound, etc.) related to a specific function performed by the UE 400. The audio output unit 403 includes a speaker, a buzzer, a receiver, and the like.

The input unit 404 is used to receive an audio or video signal. The input unit 404 may include a graphics processor (Graphics Processing Unit, GPU) 4041 and a microphone 4042, the graphics processor 4041 processing image data of still pictures or video obtained by an image capturing device (e.g., a camera) in a video capturing mode or an image capturing mode. The processed image frames may be displayed on the display unit 406. The image frames processed by the graphics processor 4041 may be stored in memory 409 (or other storage medium) or transmitted via the radio frequency unit 401 or the network module 402. The microphone 4042 may receive sound and may be capable of processing such sound into audio data. The processed audio data may be converted into a format output that can be transmitted to the mobile communication base station via the radio frequency unit 401 in the case of a telephone call mode.

The UE 400 also includes at least one sensor 405, such as a light sensor, a motion sensor, and other sensors. Specifically, 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 4061 according to the brightness of ambient light, and the proximity sensor can turn off the display panel 4061 and/or the backlight when the UE 400 moves to the ear. As one of the motion sensors, the accelerometer sensor can detect the acceleration in all directions (generally three axes), and can detect the gravity and direction when stationary, and can be used for recognizing UE gestures (such as horizontal-vertical screen switching, related games, magnetometer gesture calibration), vibration recognition related functions (such as pedometer, knocking) and the like; the sensor 405 may further include a fingerprint sensor, a pressure sensor, an iris sensor, a molecular sensor, a gyroscope, a barometer, a hygrometer, a thermometer, an infrared sensor, etc., which are not described herein.

The display unit 406 is used to display information input by a user or information provided to the user. The display unit 406 may include a display panel 4061, and the display panel 4061 may be configured in the form of a liquid crystal display (Liquid Crystal Display, LCD), an Organic Light-Emitting Diode (OLED), or the like.

The user input unit 407 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the UE 400. Specifically, the user input unit 407 includes a touch panel 4071 and other input devices 4072. The touch panel 4071, also referred to as a touch screen, may collect touch operations thereon or thereabout by a user (e.g., operations of the user on the touch panel 4071 or thereabout using any suitable object or accessory such as a finger, stylus, etc.). The touch panel 4071 may include two parts, a touch detection device and a touch controller. The touch detection device detects the touch azimuth of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch detection device, converts it into touch point coordinates, and sends the touch point coordinates to the processor 410, and receives and executes commands sent from the processor 410. In addition, the touch panel 4071 may be implemented in various types such as resistive, capacitive, infrared, and surface acoustic wave. The user input unit 407 may include other input devices 4072 in addition to the touch panel 4071. In particular, other input devices 4072 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which are not described in detail herein.

Further, the touch panel 4071 may be overlaid on the display panel 4061, and when the touch panel 4071 detects a touch operation thereon or thereabout, the touch operation is transferred to the processor 410 to determine the type of touch event, and then the processor 410 provides a corresponding visual output on the display panel 4061 according to the type of touch event. Although in fig. 5, the touch panel 4071 and the display panel 4061 are two independent components to implement the input and output functions of the UE 400, in some embodiments, the touch panel 4071 may be integrated with the display panel 4061 to implement the input and output functions of the UE 400, which is not limited herein.

The interface unit 408 is an interface through which an external device is connected to the UE 400. For example, the external devices 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, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The interface unit 408 may be used to receive input (e.g., data information, power, etc.) from external devices and transmit the received input to one or more elements within the UE 400 or may be used to transmit data between the UE 400 and external devices.

Memory 409 may be used to store software programs as well as various data. The memory 409 may mainly include a storage program area that may store an operating system, application programs required for at least one function (such as a sound playing function, an image playing function, etc.), and a storage data area; the storage data area may store data (such as audio data, phonebook, etc.) created according to the use of the handset, etc. In addition, memory 409 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid-state storage device.

The processor 410 is a control center of the UE 400, connects various parts of the entire UE 400 using various interfaces and lines, and performs various functions of the UE 400 and processes data by running or executing software programs and/or modules stored in the memory 409 and invoking data stored in the memory 409, thereby performing overall monitoring of the UE 400. Processor 410 may include one or more processing units; alternatively, the processor 410 may integrate an application processor that primarily handles operating systems, user interfaces, applications, etc., with a modem processor that primarily handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 410.

The UE 400 may further include a power source 411 (e.g., a battery) for powering the various components, and optionally, the power source 411 may be logically connected to the processor 410 by a power management system, thereby implementing functions such as charge, discharge, and power consumption management by the power management system.

In addition, the UE 400 includes some functional modules, which are not shown, and are not described herein.

Optionally, the embodiment of the present invention further provides a UE, including a processor 410, a memory 409, and a computer program stored in the memory 409 and capable of running on the processor 410 as shown in fig. 5, where the computer program when executed by the processor 410 implements the respective processes of the foregoing method embodiment, and the same technical effects are achieved, so that repetition is avoided and redundant description is omitted here.

Fig. 6 is a schematic hardware structure of a network device implementing an embodiment of the present invention, where the network device 500 includes: a receiving module 501, wherein: a receiving module 501, configured to receive, on a second cell of the UE, a radio link recovery request of a first cell of the UE from the UE; the radio link recovery request of the first cell is used for indicating the first cell to generate a target event; the first cell includes at least one of: a primary cell, a first secondary cell; the second cell includes at least one of: the primary cell, the first secondary cell, and the second secondary cell; the first auxiliary cell is an auxiliary cell for scheduling the main cell; the second auxiliary cell is an auxiliary cell except the first auxiliary cell in the auxiliary cells of the UE; the target event is BF or RLF.

Optionally, the receiving module 501 is specifically configured to: receiving a radio link recovery request of the first cell from the UE through a first bearer on the second cell; wherein the first carrier comprises at least one of the following: target RACH, target scheduling request, target MAC CE.

Optionally, in the case that the first bearer includes the target scheduling request, the target scheduling request is at least one of N scheduling requests for recovering a radio link of the first cell, where N is a positive integer.

Optionally, the target scheduling request is a scheduling request of an unassociated candidate beam reference signal; alternatively, the target scheduling request is a scheduling request in which the UE does not detect the associated candidate beam reference signal.

Optionally, the receiving module 501 is specifically configured to: if the first bearer includes the target MAC CE, if the second cell has a first uplink resource, a radio link recovery request of the first cell is received from the UE through the target MAC CE on the first uplink resource.

Optionally, if the UE detects a target candidate beam, at least one of the following is carried in the target MAC CE: the index of the target candidate beam, the first indication information; the first indication information is used for indicating whether the UE detects the target candidate beam; or if the UE does not detect the target candidate beam, the target MAC CE carries second indication information; the second indication information is used for indicating that the UE does not detect the target candidate beam.

Optionally, the receiving module 501 is further configured to: in the case where the first bearer includes the target MAC CE, a first scheduling request is received from the UE.

Optionally, if the UE detects a target candidate beam, at least one of the following is carried in the first scheduling request and/or the target MAC CE: the index of the target candidate beam, the first indication information; the first indication information is used for indicating that the UE detects the target candidate beam; or if the UE does not detect the target candidate beam, the first scheduling request and/or the target MAC CE carries second indication information; the second indication information is used for indicating that the UE does not detect the target candidate beam.

Optionally, the above network device further includes: a sending module 502, wherein: a sending module 502, configured to send first target configuration information to a UE; the first target configuration information is used for recovering the wireless link of the first cell.

Optionally, the receiving module 501 is specifically configured to: and receiving a radio link recovery request of the first cell from the UE on the second cell according to the first target configuration information.

Optionally, the sending module 502 is further configured to send, on a third cell, a radio link recovery response of the first cell to the UE; the third cell is at least one cell of the second cells.

Optionally, the radio link recovery response of the first cell is RAR.

Optionally, the sending module 502 is specifically configured to: transmitting a radio link recovery response of the first cell to the UE on the first resource of the third cell; wherein the first resource includes at least one of: target CORESET, target search space, and the third cell includes a target common search space when the primary cell is.

Optionally, the sending module 502 is specifically configured to: and if the first resource includes the target CORESET, transmitting a radio link recovery response of the first cell to the UE over at least one search space associated with the target CORESET.

Optionally, the at least one search space is the target search space.

Optionally, the sending module 502 is further configured to send second target configuration information to the UE; the second target configuration information is used for recovering the wireless link of the first cell.

Optionally, the receiving module 501 is specifically configured to: and according to the second target configuration information, transmitting a radio link recovery response of the first cell to the UE on the third cell.

Optionally, the sending module 502 is further configured to: transmitting target detection resources to the UE; wherein, the target detection resource is used for evaluating or measuring the beam when the target event is BF, and is used for evaluating or measuring the radio link when the target event is RLF.

It should be noted that, as shown in fig. 6, modules that are necessarily included in the network device 500 are illustrated by solid line boxes, such as a receiving module 501; modules that may or may not be included in the network device 500 are illustrated with dashed boxes, such as the transmit module 502.

The network device provided in the embodiment of the present invention may be the network device that can implement each process shown in the foregoing method embodiment, and in order to avoid repetition, details are not repeated here.

The network device provided in the embodiment of the present invention, if a first cell of a UE (including at least one of the primary cell and a first secondary cell (secondary cell scheduling the primary cell)) generates a target event (BF or RLF), sends a radio link recovery request of the first cell to the network device in a second cell of the UE (including at least one of the primary cell, the first secondary cell and a second secondary cell (secondary cell other than the first secondary cell in the secondary cells of the UE)). By means of the scheme, when the target event occurs in the first cell, a radio link recovery request of the first cell can be sent to the network equipment on the second cell (the network equipment can know that the target event occurs in the first cell after receiving the radio link recovery request of the first cell and then further trigger the radio link recovery of the first cell), so that under the condition that the secondary cell schedules the primary cell, if BF or RLF occurs in the primary cell or BF or RLF occurs in the secondary cell, the radio link recovery can be rapidly achieved.

Fig. 7 is a schematic hardware structure of a network device implementing an embodiment of the present invention, where the network device 600 is a target network device to which a target cell belongs, and the network device 600 includes: a processor 601, a transceiver 602, a memory 603, a user interface 604 and a bus interface 605.

Wherein the transceiver 602 is configured to receive, on the second cell of the UE, a radio link recovery request from the first cell of the UE; the radio link recovery request of the first cell is used for indicating the first cell to generate a target event; the first cell includes at least one of: a primary cell, a first secondary cell; the second cell includes at least one of: the primary cell, the first secondary cell, and the second secondary cell; the first auxiliary cell is an auxiliary cell for scheduling the main cell; the second auxiliary cell is an auxiliary cell except the first auxiliary cell in the auxiliary cells of the UE; the target event is BF or RLF.

In the embodiment of the invention, in FIG. 7, the bus architecture may comprise any number of interconnected buses and bridges, with the various circuits of the memory, in particular, represented by the one or more processors represented by processor 601 and memory 603. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are well known in the art and, therefore, will not be described further herein. The bus interface provides an interface. The transceiver 602 may be a number of elements, i.e., including a transmitter and a receiver, providing a means for communicating with various other apparatus over a transmission medium. The user interface 604 may also be an interface capable of interfacing with an inscribed desired device, including but not limited to a keypad, display, speaker, microphone, joystick, etc., for different UEs. The processor 601 is responsible for managing the bus architecture and general processing, and the memory 603 may store data used by the processor 601 in performing operations.

In addition, the network device 600 further includes some functional modules, which are not shown, and are not described herein.

Optionally, the embodiment of the present invention further provides a network device, including a processor 601 shown in fig. 7, a memory 603, and a computer program stored in the memory 603 and capable of running on the processor 601, where the computer program when executed by the processor 601 implements each process of the embodiment of the method, and the same technical effects can be achieved, and for avoiding repetition, a description is omitted herein.

The embodiment of the invention also provides a communication system which comprises the UE and the network equipment.

The embodiment of the present invention further provides a computer readable storage medium, on which a computer program is stored, where the computer program implements each process of the above-described method embodiment when executed by the processor 410 shown in fig. 5 and/or the processor 601 shown in fig. 7, and the same technical effects are achieved, and for avoiding repetition, a detailed description is omitted herein. Among them, a computer readable storage medium such as Read-Only Memory (ROM), random access Memory (Random Access Memory RAM), magnetic disk or optical disk, and the like.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) comprising instructions for causing a terminal device (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the method according to the embodiments of the present invention.

The embodiments of the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present invention and the scope of the claims, which are to be protected by the present invention.

Claims

1. A radio link recovery method applied to a user equipment UE, the method comprising:

if a target event occurs in a first cell of the UE, sending a radio link recovery request of the first cell to network equipment on a second cell of the UE;

wherein the first cell is: a primary cell; the second cell is: a first secondary cell; alternatively, the first cell is: the first secondary cell; the second cell includes at least one of: the first auxiliary cell and the second auxiliary cell;

the first auxiliary cell is an auxiliary cell for scheduling the main cell; the second auxiliary cell is an auxiliary cell except the first auxiliary cell in the auxiliary cells of the UE;

the target event is beam failure BF or radio link failure RLF;

the sending, on the second cell of the UE, a radio link recovery request of the first cell to a network device, including:

transmitting a radio link recovery request of the first cell to a network device through a first carrier on the second cell; wherein the first carrier comprises at least one of: a target random access channel RACH, a target scheduling request, a target media access control-control unit MAC-CE;

Before the radio link recovery request of the first cell is sent to the network device on the second cell of the UE, the method further includes:

acquiring first target configuration information, wherein the first target configuration information is used for recovering a wireless link of the first cell;

the first target configuration information includes at least one of: the configuration information related to the primary cell, the configuration information related to the first secondary cell, and the configuration information related to the combination of the primary cell and the first secondary cell.

2. The method according to claim 1, wherein in case the first bearer comprises the target scheduling request, the target scheduling request is at least one of N scheduling requests for recovering the radio link of the first cell, N being a positive integer.

3. The method of claim 2, wherein each of M of the N scheduling requests is associated with a candidate beam reference signal, M being a positive integer less than or equal to N.

4. A method according to claim 3, wherein the target scheduling request is determined based on measurements of candidate beam-reference signals associated with each of the M scheduling requests.

5. The method according to claim 3 or 4, wherein the target scheduling request is a scheduling request corresponding to a first candidate beam reference signal;

wherein the first candidate beam reference signal is a candidate beam reference signal satisfying a predetermined condition.

6. The method according to claim 1 or 2, wherein in case the first bearer comprises the target scheduling request, the target scheduling request is a scheduling request of an unassociated candidate beam reference signal; alternatively, the target scheduling request is a scheduling request in which the UE does not detect an associated candidate beam reference signal.

7. The method of claim 1, wherein, in the case where the first bearer includes the target MAC CE, the sending, on the second cell, a radio link recovery request of the first cell to a network device through the first bearer, comprises:

and if the second cell has the first uplink resource, sending a radio link recovery request of the first cell to the network equipment through the target MAC CE on the first uplink resource.

8. The method of claim 7, wherein if the UE detects a target candidate beam, the target MAC CE carries at least one of: the index of the target candidate beam, first indication information; the first indication information is used for indicating whether the UE detects the target candidate beam;

Or,

if the UE does not detect the target candidate beam, the target MAC CE carries second indication information; the second indication information is used for indicating that the UE does not detect the target candidate beam.

9. The method of claim 1, wherein, in the case where the first bearer includes the target MAC CE, before the sending, on the second cell, a radio link recovery request for the first cell to a network device over the first bearer, the method further comprises:

and sending a first scheduling request to the network equipment.

10. The method of claim 9, wherein the first scheduling request satisfies any one of:

and the scheduling request is used for recovering the wireless link of the first cell and the scheduling request is used for recovering the wireless link of any auxiliary cell.

11. The method according to claim 9 or 10, wherein if the UE detects a target candidate beam, at least one of the first scheduling request and the target MAC CE carries at least one of: the index of the target candidate beam, first indication information; the first indication information is used for indicating whether the UE detects the target candidate beam;

Or,

if the UE does not detect the target candidate beam, carrying second indication information by at least one of the first scheduling request and the target MAC CE; the second indication information is used for indicating that the UE does not detect the target candidate beam.

12. The method according to any of claims 7 to 10, wherein the target MAC CE satisfies at least one of:

the wireless link is used for recovering the wireless link of the first cell and carries a target identifier;

wherein the target identifier is used for indicating the first cell.

13. The method of claim 1, wherein the sending, on the second cell of the UE, the radio link recovery request of the first cell to the network device comprises:

and sending a radio link recovery request of the first cell to the network equipment on the second cell according to the first target configuration information.

14. The method of claim 1, wherein after the sending the radio link recovery request of the first cell to the network device on the second cell of the UE, the method further comprises:

receiving, on a third cell, a radio link recovery response of the first cell from the network device;

The third cell is at least one cell of the second cells.

15. The method of claim 14, wherein receiving, on the third cell, a radio link recovery response for the first cell from the network device comprises:

receiving a radio link recovery response of the first cell from the network device on a first resource of the third cell;

wherein the first resource comprises at least one of: and the third cell comprises a target public search space when the main cell is included in a target resource control set CORESET.

16. The method of claim 14, wherein the method further comprises, at a third cell, prior to receiving a radio link recovery response for the first cell from the network device:

acquiring second target configuration information;

17. The method of claim 16, wherein receiving, on the third cell, a radio link recovery response for the first cell from the network device comprises:

and receiving a radio link recovery response of the first cell from the network equipment on the third cell according to the second target configuration information.

18. The method according to claim 16 or 17, wherein the second target configuration information comprises at least one of: the configuration information related to the primary cell, the configuration information related to the first secondary cell, and the configuration information related to the combination of the primary cell and the first secondary cell.

19. The method according to claim 1, wherein in case of a target event in a first cell, before sending a radio link recovery request of the first cell to a network device in a second cell of the UE, the method further comprises:

under the condition that the measurement result of the target detection resource meets the target condition, the physical layer of the UE sends target indication information to the higher layer of the UE;

wherein the target indication information is used for indicating the target event.

20. The method of claim 19, wherein the target detection resources comprise at least one of: and the first detection resource is configured for the primary cell, and the second detection resource is configured for the first secondary cell.

21. The method of claim 20, wherein the target condition comprises a first condition or a second condition;

Wherein the first condition includes at least one of:

in the case that the target detection resources include the first detection resources, measurement results of X resources in the first detection resources are greater than or equal to a second threshold; in the case that the target detection resources include the second detection resources, measurement results of Y resources in the second detection resources are greater than or equal to a third threshold;

the second condition is: in the case that the target detection resources include the first detection resources and the second detection resources, measurement results of Z resources in the first detection resources and the second detection resources are greater than or equal to corresponding thresholds;

x, Y, Z are all positive integers.

22. The method according to claim 20 or 21, wherein in case the target detection resource comprises the first detection resource and the second detection resource, the transmission period of the target indication information is: the minimum value of the detection period of the first detection resource and the detection period of the second detection resource.

23. A wireless link recovery method applied to a network device, the method comprising:

Receiving, on a second cell of a user equipment UE, a radio link recovery request of a first cell of the UE from the UE;

the wireless link recovery request of the first cell is used for indicating the first cell to generate a target event;

the first cell is: a primary cell; the second cell is: a first secondary cell; alternatively, the first cell is: the first secondary cell; the second cell includes at least one of: the first auxiliary cell and the second auxiliary cell;

the target event is beam failure BF or radio link failure RLF;

the receiving, on a second cell of a UE, a radio link recovery request of a first cell of the UE from the UE, including:

receiving, on the second cell, a radio link recovery request of the first cell from the UE over a first bearer;

wherein the first carrier comprises at least one of: a target random access channel RACH, a target scheduling request, a target media access control-control unit MAC CE;

The method further comprises, on a second cell of the UE, before receiving a radio link recovery request from the UE for a first cell of the UE:

sending first target configuration information to the UE; the first target configuration information is used for recovering the wireless link of the first cell;

24. The method of claim 23, wherein the target scheduling request is a scheduling request of an unassociated candidate beam reference signal if the first bearer includes the target scheduling request; alternatively, the target scheduling request is a scheduling request in which the UE does not detect an associated candidate beam reference signal.

25. The method of claim 23, wherein, in the case where the first bearer includes the target MAC CE, the receiving, on the second cell, a radio link recovery request of the first cell from the UE over the first bearer, comprises:

and if the second cell has the first uplink resource, receiving a radio link recovery request of the first cell from the UE through the target MAC CE on the first uplink resource.

26. The method of claim 23, wherein, in the case where the first bearer includes the target MAC CE, the method further comprises, prior to receiving, on the second cell, a radio link recovery request for the first cell from the UE over the first bearer:

a first scheduling request is received from the UE.

27. The method of claim 26, wherein the first scheduling request satisfies any one of:

28. The method of claim 23, wherein receiving, on the second cell of the UE, a radio link recovery request from the UE for the first cell of the UE comprises:

and receiving a radio link recovery request of the first cell from the UE on the second cell according to the first target configuration information.

29. The method of claim 23, wherein the method further comprises, after receiving a radio link recovery request from the UE for the first cell of the UE on the second cell of the UE:

Transmitting a radio link recovery response of the first cell to the UE on a third cell;

the third cell is at least one cell of the second cells.

30. The method of claim 29, wherein the method further comprises, at the third cell, prior to transmitting the radio link recovery response of the first cell to the UE:

sending second target configuration information to the UE;

31. The method of claim 30, wherein the transmitting, on the third cell, the radio link recovery response of the first cell to the UE comprises:

and according to the second target configuration information, transmitting a radio link recovery response of the first cell to the UE on the third cell.

32. The method of claim 23, wherein the method further comprises, at the second cell of the UE, prior to receiving the radio link recovery request from the UE for the first cell of the UE:

and sending target detection resources to the UE.

33. The method of claim 32, wherein the target detection resources comprise at least one of: and the first detection resource is configured for the primary cell, and the second detection resource is configured for the first secondary cell.

34. A user equipment, UE, characterized in that the UE comprises: a sending module and an obtaining module;

the sending module is configured to send, to a network device, a radio link recovery request of a first cell of the UE, on a second cell of the UE, if a target event occurs in the first cell;

the target event is beam failure BF or radio link failure RLF;

the sending module is specifically configured to send, on the second cell, a radio link recovery request of the first cell to a network device through a first bearer; wherein the first carrier comprises at least one of: a target random access channel RACH, a target scheduling request, a target media access control-control unit MAC-CE;

the acquisition module is configured to acquire first target configuration information, where the first target configuration information is used to recover a radio link of the first cell;

35. A network device, the network device comprising: a receiving module and a transmitting module;

the receiving module is used for receiving a radio link recovery request of a first cell of User Equipment (UE) from the UE on a second cell of the UE;

the target event is beam failure BF or radio link failure RLF;

the receiving module is specifically configured to receive, on the second cell, a radio link recovery request of the first cell from the UE through a first bearer; the first carrier comprises at least one of the following: a target random access channel RACH, a target scheduling request, a target media access control-control unit MAC CE;

The sending module is configured to send first target configuration information to the UE, where the first target configuration information is used to restore a radio link of the first cell;