CN110022611B - Method and device for realizing beam failure recovery and user equipment - Google Patents
Method and device for realizing beam failure recovery and user equipment Download PDFInfo
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- CN110022611B CN110022611B CN201810023574.9A CN201810023574A CN110022611B CN 110022611 B CN110022611 B CN 110022611B CN 201810023574 A CN201810023574 A CN 201810023574A CN 110022611 B CN110022611 B CN 110022611B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/046—Wireless resource allocation based on the type of the allocated resource the resource being in the space domain, e.g. beams
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
Abstract
The invention provides a method, a device and user equipment for realizing beam failure recovery. The method comprises the following steps: when the base station configures carrier aggregation for the UE, receiving a lead code which is configured for part or all service carriers of the UE by the base station and used for sending a beam failure recovery request; when detecting that at least one service carrier configured with the preamble code has beam failure, sending a beam failure recovery request to a base station through the preamble code corresponding to the service carrier, so that the base station identifies the service carrier with the beam failure according to the preamble code and sends a beam failure recovery response on the service carrier; and detecting a beam failure recovery response sent by the base station, and recovering the communication of the service carrier with the base station when the beam failure recovery response is detected. The invention can realize the beam failure recovery under the scene of carrier aggregation.
Description
Technical Field
The present invention relates to the field of wireless communication technologies, and in particular, to a method, an apparatus, and a user equipment for implementing beam failure recovery.
Background
In 5G (or NR, new Radio), because 5G is deployed at high frequency, wireless signals exhibit characteristics of good directivity and large path loss at high frequency, a large cell needs multiple beams to achieve complete coverage, and one Beam can only cover a limited range. A small cell may contain only one beam. For a cell formed by multiple beams, due to the limitation of hardware, not all beams can be transmitted at the same time, and time-sharing transmission is required, which is called Beam Sweeping.
For a cell in the NR, its synchronization signal (including the primary synchronization signal and the secondary synchronization signal) is transmitted within 5ms at a certain period, such as a period of 5ms/10ms/20ms/40ms/80 ms. As shown in fig. 1, a cell may transmit one or more SS blocks (synchronization signal blocks, i.e. different beams), such as 4 SS blocks or 8 SS blocks. One SS block includes PSS (Primary Synchronization Signal)/SSs (Secondary Synchronization Signal) and PBCH (Physical Broadcast Channel). The PSS and SSS are used to identify the cell identity to the UE and to obtain symbol-level synchronization for the UE.
For a connected UE, the currently serving Beam may be one or more, for example, DCI (Downlink Control Information) of the UE is received from a CORESET (Control Resource Set) on Beam1, and the DCI instructs the UE to receive data from Beam1 or from a PDSCH (Physical Downlink Shared channel) on Beam 2. Since the coverage of each Beam is small and the UE moves frequently, the UE is easily in a Beam Failure (Beam Failure) state, that is, the UE detects that the signal quality of the current serving Beam is lower than a certain threshold, for example, the PDCCH (Physical Downlink Control Channel) BLER (Block Error Rate) is higher than the threshold, so that the UE cannot receive DCI from the serving Beam smoothly. The UE needs to wait for the number of detected Beam failures to reach a certain threshold, and then sends a Beam Failure Recovery Request (Beam Failure Recovery Request) to the base station, and may send a dedicated Preamble (Preamble) through other beams, for example, through random access slots related to the other beams, and then receive a response from the base station, for example, the base station may send a response on the other beams. And when the UE successfully receives the recovery response sent by the base station, the recovery process of the UE is successful.
In the beam failure recovery process, a beam failure recovery procedure on a PCell (Primary Cell) is mainly considered, and a beam failure recovery procedure on an SCell (Secondary Cell) is not considered, and therefore the method cannot be applied to a carrier aggregation scenario, particularly a scenario in which the number of downlink carriers is greater than the number of uplink carriers.
Disclosure of Invention
The method, the device and the user equipment for realizing the beam failure recovery can realize the beam failure recovery in a carrier aggregation scene.
In a first aspect, the present invention provides a method for implementing beam failure recovery, including:
when the base station configures carrier aggregation for the UE, receiving a lead code which is configured for part or all service carriers of the UE by the base station and used for sending a beam failure recovery request;
when detecting that at least one service carrier configured with the lead code has beam failure, sending a beam failure recovery request to a base station through the lead code corresponding to the service carrier, so that the base station identifies the service carrier with the beam failure according to the lead code and sends a beam failure recovery response on the service carrier;
and detecting a beam failure recovery response sent by the base station, and recovering the communication of the service carrier with the base station when the beam failure recovery response is detected.
Optionally, the method further comprises:
and receiving a reference signal of a detection beam failure, a beam failure frequency threshold, a reference signal of a potential beam and a threshold which are configured for part or all service carriers of the UE by the base station.
Optionally, the method further comprises:
receiving the maximum transmission number of the preambles, configured by the base station for part or all of the serving carriers of the UE, for transmitting the beam failure recovery request.
Optionally, the method further comprises:
receiving CORESET configuration of detection beam failure recovery response configured by a base station for part or all service carriers of the UE;
the detecting the beam failure recovery response sent by the base station comprises: and configuring a beam failure recovery response sent by the detection base station according to the CORESET of the detection beam failure recovery response.
Optionally, the method further comprises:
receiving uplink random access resource allocation of part or all service carriers sent by a base station;
the sending, to the base station, the beam failure recovery request through the preamble corresponding to the serving carrier includes: and sending a beam failure recovery request to a base station according to the uplink random access resource configuration of the service carrier through the lead code corresponding to the service carrier.
Optionally, the random access resource configuration includes: time slot configuration of random access, frequency position of random access and corresponding relation between random access resources and synchronous signal blocks.
Optionally, the base station applies all preambles, configured for part or all of the service carriers of the UE, for the beam failure recovery request to the random access channel of the uplink primary cell;
the base station configures different preamble indexes and/or different preamble formats of preambles for part or all of the serving carriers of the UE.
Optionally, the maximum transmission times of the preambles configured by the base station for part or all of the serving carriers of the UE are different.
Optionally, the method further includes:
when the UE finds that the beam of the primary cell fails and executes the beam failure recovery process, but the beam recovery fails, the UE triggers RRC connection reestablishment.
In a second aspect, the present invention provides an apparatus for implementing beam failure recovery, including:
a receiving unit, configured to receive a preamble configured by a base station for a part or all of service carriers of a UE and used for sending a beam failure recovery request when the base station configures carrier aggregation for the UE;
a sending unit, configured to send a beam failure recovery request to a base station through a preamble corresponding to at least one service carrier configured with the preamble when detecting that a beam failure occurs in the service carrier, so that the base station identifies the service carrier where the beam failure occurs according to the preamble and sends a beam failure recovery response on the service carrier;
and the detection unit is used for detecting the beam failure recovery response sent by the base station and recovering the communication of the service carrier with the base station when the beam failure recovery response is detected.
Optionally, the receiving unit is further configured to receive a reference signal of a sounding beam failure, a threshold of a number of beam failures, a reference signal of a potential beam, and a threshold, where the reference signal of a sounding beam failure is configured for part or all of serving carriers of the UE by the base station.
Optionally, the receiving unit is further configured to receive a maximum number of times of sending the preamble configured by the base station for part or all of the serving carriers of the UE, where the preamble is used for sending the beam failure recovery request.
Optionally, the receiving unit is further configured to receive a CORESET configuration of a detection beam failure recovery response configured by the base station for a part or all of the service carriers of the UE;
and the detection unit is used for detecting the beam failure recovery response sent by the base station according to the CORESET configuration of the detection beam failure recovery response.
Optionally, the receiving unit is further configured to receive uplink random access resource configuration of a part or all of the service carriers sent by the base station;
and the sending unit is configured to send a beam failure recovery request to a base station according to the uplink random access resource configuration of the serving carrier through the preamble corresponding to the serving carrier.
Optionally, the random access resource configuration includes: time slot configuration of random access, frequency position of random access and corresponding relation between random access resources and synchronous signal blocks.
Optionally, the preambles, configured by the base station for part or all of the service carriers of the UE, for the beam failure recovery request are all applied to the random access channel of the uplink primary cell;
the base station configures different preamble indexes and/or different preamble formats of preambles for part or all of the serving carriers of the UE.
Optionally, the maximum transmission times of the preambles configured by the base station for part or all of the serving carriers of the UE are different.
Optionally, the apparatus further comprises:
and the triggering unit is used for triggering RRC connection reestablishment when the UE finds that the beam of the primary cell fails and executes a beam failure recovery process but the beam recovery fails.
In a third aspect, the present invention provides a user equipment, where the user equipment includes the apparatus for implementing beam failure recovery.
According to the method, the device and the user equipment for realizing the beam failure recovery, when carrier aggregation is configured, the UE receives the lead codes which are configured for part or all service carriers by the base station and used for sending the beam failure recovery request, and when the beam failure of at least one service carrier configured with the lead codes is detected, the beam failure recovery request is sent to the base station through the lead codes corresponding to the service carriers, so that the base station identifies the service carrier with the beam failure according to the lead codes and sends the beam failure recovery response on the service carrier, and when the beam failure recovery response is detected, the communication of the service carrier is recovered with the base station, so that the beam failure recovery can be realized in a carrier aggregation scene, and the transmission reliability is improved.
Drawings
Fig. 1 is a schematic diagram of synchronization signal block transmission in a cell in NR;
FIG. 2 is a flowchart illustrating a method for implementing beam failure recovery according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an apparatus for implementing beam failure recovery according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
An embodiment of the present invention provides a method for implementing beam failure recovery, as shown in fig. 2, the method includes:
s11, when the base station configures carrier aggregation for the UE, receiving a preamble which is configured for part or all service carriers of the UE by the base station and used for sending a beam failure recovery request.
S12, when detecting that at least one service carrier configured with the preamble fails to generate the beam, sending a beam failure recovery request to the base station through the preamble corresponding to the service carrier, so that the base station identifies the service carrier with the beam failure according to the preamble and sends a beam failure recovery response on the service carrier.
And S13, detecting a beam failure recovery response sent by the base station, and recovering the communication of the service carrier with the base station when the beam failure recovery response is detected.
According to the method for realizing the beam failure recovery, when carrier aggregation is configured, UE receives the lead codes which are configured for part or all service carriers by a base station and used for sending the beam failure recovery request, when the beam failure of at least one service carrier configured with the lead codes is detected, the beam failure recovery request is sent to the base station through the lead codes corresponding to the service carriers, so that the base station identifies the service carrier with the beam failure according to the lead codes and sends the beam failure recovery response on the service carriers, and when the beam failure recovery response is detected, the communication of the service carriers is recovered with the base station, therefore, the beam failure recovery can be realized under a carrier aggregation scene, and the transmission reliability is improved.
The method for implementing beam failure recovery according to the present invention is described in detail with reference to the following embodiments.
The UE accesses the cell to establish an RRC (Radio Resource Control) connection and performs a service. The network then configures the UE with carrier aggregation, i.e., the UE has multiple serving cells (one primary cell and one or more secondary cells). The UE may experience beam failure in multiple serving cells.
Example 1
The UE has 3 downlink carriers and corresponding 3 uplink carriers.
The UE needs to detect the PDCCH on 3 carriers in order to obtain its own downlink control signaling. The base station configures, for each serving carrier of the UE, a Reference signal for detecting a beam failure, such as CSI-RS (Channel State Information Reference Signals) or SS Block, a threshold for the number of times of beam failure (reaching the threshold triggers a beam failure recovery request), a Reference signal for a potential beam, a parameter such as a threshold, a preamble for transmitting the beam failure recovery request, the maximum number of times of transmission thereof, and CORESET for detecting a beam failure recovery response. The potential beam is a beam which is likely to serve the UE in the future, and the base station may determine a serving beam behind the UE according to the location, moving direction, and the like of the UE. When the base station configures independent beam failure recovery related parameters for 3 carriers, the base station needs to indicate to the UE the random access resources configured on the 3 uplink carriers, including the timeslot configuration of random access, the frequency location of random access, and the corresponding relationship between the random access resources and SS Block. Thus, when the UE detects that a certain carrier wave beam fails, the preamble distributed to the UE by the base station is sent according to the random access resource configuration on the carrier wave.
The base station may allocate different Preamble indexes (Preamble indexes) to different service carriers, or may allocate the same Preamble Index to different service carriers. Specifically, the base station allocates to 3 serving cells:
PCell: the method comprises the steps of configuring uplink random access resources, configuring a special lead code (used for sending a beam failure recovery request and aiming at a beam failure recovery process of a PCell) for the UE, the maximum transmission times of the lead code, configuring CORESET for the UE to monitor beam recovery response, and other parameters such as reference signals of potential beams, thresholds and the like;
SCell1: the method comprises the steps of configuring uplink random access resources, configuring a special lead code (used for sending a beam failure recovery request and aiming at a beam failure recovery process of an SCell 1) for the UE, configuring the maximum transmission times of the lead code, monitoring the CORESET configuration of beam recovery response by the UE, and other parameters such as reference signals of potential beams, thresholds and the like;
SCell2: the method comprises the steps of uplink random access resource configuration, a lead code (used for sending a beam failure recovery request and aiming at a beam failure recovery process of an SCell 2) special for the UE, the maximum transmission times of the lead code, CORESET configuration of UE monitoring beam recovery response, and other parameters such as reference signals of potential beams, thresholds and the like. Configuring the maximum transmission times of different preambles takes into account the coverage areas of different carriers and the importance of the carriers, and a larger maximum transmission time can be set for the beam failure recovery request in the primary cell to improve the success rate of the recovery process.
Generally, after the UE sends the beam failure recovery request, the base station sends a beam failure recovery response to the UE, the UE and the base station recover communication, and the beam failure recovery succeeds; or after the UE sends the beam failure recovery request for several times (or less than or equal to the maximum transmission time of the preamble), the base station sends a beam failure recovery response to the UE, and the UE and the base station recover communication, so that the beam failure recovery is successful. However, there is also a scenario in which the UE sends a beam failure recovery request for multiple times (the maximum transmission number of preambles is reached), but the base station does not successfully detect the request sent by the UE, and at this time, the base station does not send a beam failure recovery response, which means that the beam recovery fails (that is, when a beam failure occurs in one carrier, the UE does not recover the communication of the carrier between the UE and the base station through the beam failure recovery procedure). If the beam recovery failure is located in the secondary cell (i.e. non-primary cell), the UE can still communicate with the base station through the PCell; if the beam failure is located in the primary cell, the UE executes the beam failure recovery procedure in the MAC (Medium Access Control, media Access layer) layer, and at this time, the MAC layer of the UE needs to notify the RRC layer, and the RRC layer triggers an RRC connection reestablishment procedure (or referred to as an RRC reestablishment procedure). The RRC connection reestablishment procedure may reuse an existing procedure, for example, if the current RRC connection needs to be interrupted, the cell is reselected, and if a suitable NR cell is selected, an RRC connection reestablishment request is sent to the newly selected cell, and the newly selected cell and the UE may reestablish the RRC connection.
The other implementation mode comprises the following steps: part or all of the service carriers allocated by the base station to the UE are used for the preambles of the beam failure recovery request, and may all be applied to the random access channel of the uplink PCell, that is, all the preambles are transmitted through the random access channel on the uplink primary cell. Different carriers may be assigned different preambles at this time, such as different preamble indices and/or different preamble formats. When a beam of a certain carrier fails, a preamble corresponding to the carrier is sent on an uplink PCell, so that a base station can identify which serving cell has the beam failure.
Example 2
The UE in a connected state is configured with carrier aggregation, the UE has two downlink carriers and one uplink carrier, the number of the downlink carriers exceeds the number of the uplink carriers, wherein the primary cell PCell comprises a downlink PCell and an uplink PCell, and only comprises one uplink SCell. The UE needs to detect the PDCCH on both carriers.
At this time, only the uplink PCell is configured with the random access resource.
The base station configures, for each serving carrier of the UE, a reference signal such as CSI-RS or SS Block for detecting a beam failure, a threshold for the number of beam failures (the threshold is reached to trigger a beam failure recovery request), a reference signal for a potential beam, a threshold, and other parameters, a preamble for transmitting the beam failure recovery request and the maximum number of transmissions thereof, and a CORESET for detecting a beam failure recovery response, where the CORESET for receiving the beam failure recovery response is located on the serving carrier where the beam failure occurs. Because only the uplink PCell is configured with the random access resource, the base station configures a corresponding preamble for each downlink carrier for the beam failure recovery request, and needs to allocate different preamble indexes and/or different preamble formats.
When the UE finds that a beam of a certain carrier fails (that is, a trigger beam failure recovery request is satisfied), the UE sends the beam failure recovery request through a preamble corresponding to the carrier. The base station identifies which carrier has a beam failure through a preamble transmitted by the UE, and then transmits a beam failure recovery response on the carrier. The UE resumes communication with the base station for this carrier by receiving the response, and the carrier can continue to be used.
An embodiment of the present invention further provides a device for implementing beam failure recovery, as shown in fig. 3, the device includes:
a receiving unit 11, configured to receive a preamble configured by a base station for a part or all of service carriers of a UE to send a beam failure recovery request when the base station configures carrier aggregation for the UE;
a sending unit 12, configured to send a beam failure recovery request to a base station through a preamble corresponding to at least one service carrier configured with the preamble when detecting that a beam failure occurs in the service carrier, so that the base station identifies the service carrier where the beam failure occurs according to the preamble and sends a beam failure recovery response on the service carrier;
and a detecting unit 13, configured to detect a beam failure recovery response sent by the base station, and resume communication with the base station for the serving carrier when the beam failure recovery response is detected.
According to the device for realizing beam failure recovery provided by the embodiment of the invention, when carrier aggregation is configured, UE (user equipment) receives the lead codes which are configured for part or all service carriers by a base station and used for sending beam failure recovery requests, and when the beam failure of at least one service carrier configured with the lead code is detected, the beam failure recovery requests are sent to the base station through the lead code corresponding to the service carrier, so that the base station identifies the service carrier with the beam failure according to the lead code and sends the beam failure recovery response on the service carrier, and when the beam failure recovery response is detected, the communication of the service carrier is recovered with the base station, so that the beam failure recovery can be realized under a carrier aggregation scene, and the transmission reliability is improved.
Optionally, the receiving unit 11 is further configured to receive a reference signal of a sounding beam failure, a threshold of a number of beam failure times, a reference signal of a potential beam, and a threshold, where the base station configures for part or all of service carriers of the UE.
Optionally, the receiving unit 11 is further configured to receive a maximum number of times of sending the preamble configured by the base station for part or all of the serving carriers of the UE, where the preamble is used for sending the beam failure recovery request.
Optionally, the receiving unit 11 is further configured to receive a CORESET configuration of a detection beam failure recovery response configured by the base station for part or all of service carriers of the UE;
the detecting unit 13 is configured to detect the beam failure recovery response sent by the base station according to the CORESET configuration of the detected beam failure recovery response.
Optionally, the receiving unit 11 is further configured to receive uplink random access resource configuration of a part or all of the service carriers sent by the base station;
the sending unit 12 is configured to send a beam failure recovery request to a base station according to the uplink random access resource configuration of the serving carrier through the preamble corresponding to the serving carrier.
Optionally, the random access resource configuration includes: time slot configuration of random access, frequency position of random access and corresponding relation between random access resources and synchronous signal blocks.
Optionally, the preambles, configured by the base station for part or all of the service carriers of the UE, for the beam failure recovery request are all applied to the random access channel of the uplink primary cell;
the base station configures different preamble indexes and/or different preamble formats of preambles for part or all of the serving carriers of the UE.
Optionally, the maximum transmission times of the preambles configured by the base station for part or all of the serving carriers of the UE are different.
Optionally, the apparatus further comprises:
and the triggering unit is used for triggering RRC connection reestablishment when the UE finds that the beam of the primary cell fails and executes a beam failure recovery process but the beam recovery fails.
The apparatus of this embodiment may be configured to implement the technical solutions of the above method embodiments, and the implementation principles and technical effects are similar, which are not described herein again.
The embodiment of the invention also provides the user equipment, and the user equipment comprises the device for realizing the beam failure recovery.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are also within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (19)
1. A method for performing beam failure recovery, the method comprising:
when the base station configures carrier aggregation for the UE, receiving a lead code which is configured for part or all service carriers of the UE by the base station and used for sending a beam failure recovery request;
when detecting that at least one service carrier configured with the lead code has beam failure, sending a beam failure recovery request to a base station through the lead code corresponding to the service carrier, so that the base station identifies the service carrier with the beam failure according to the lead code and sends a beam failure recovery response on the service carrier;
and detecting a beam failure recovery response sent by the base station, and recovering the communication of the service carrier with the base station when the beam failure recovery response is detected.
2. The method according to claim 1, wherein before the sending a beam failure recovery request to the base station through the preamble corresponding to the serving carrier when the beam failure is detected on at least one serving carrier configured with the preamble, the method further comprises:
and receiving a reference signal of a detection beam failure, a beam failure frequency threshold, a reference signal of a potential beam and a threshold which are configured for part or all service carriers of the UE by the base station.
3. The method according to claim 1 or 2, wherein before the sending a beam failure recovery request to the base station through the preamble corresponding to the serving carrier when detecting that the beam failure occurs in at least one of the serving carriers configured with the preamble, the method further comprises:
receiving the maximum transmission times of the preambles, configured by the base station for part or all of the serving carriers of the UE, for transmitting the beam failure recovery request.
4. The method according to any one of claims 1 to 2, wherein before the sending a beam failure recovery request to a base station through a preamble corresponding to at least one service carrier configured with the preamble when the beam failure is detected, the method further comprises:
receiving CORESET configuration of detection beam failure recovery response configured by a base station for part or all service carriers of the UE;
the detecting the beam failure recovery response sent by the base station comprises: and configuring a beam failure recovery response sent by the detection base station according to the CORESET configuration of the beam failure recovery response.
5. The method according to any one of claims 1 to 2, wherein before the sending a beam failure recovery request to a base station through a preamble corresponding to at least one service carrier configured with the preamble when the beam failure is detected, the method further comprises:
receiving uplink random access resource allocation of part or all service carriers sent by a base station;
the sending, to the base station, the beam failure recovery request through the preamble corresponding to the serving carrier includes: and sending a beam failure recovery request to a base station according to the uplink random access resource configuration of the service carrier through the lead code corresponding to the service carrier.
6. The method of claim 5, wherein the random access resource configuration comprises: time slot configuration of random access, frequency position of random access and corresponding relation between random access resource and synchronous signal block.
7. The method according to any of claims 1 to 2, wherein the preambles configured by the base station for some or all of the serving carriers of the UE for transmitting the beam failure recovery request are all applied to the random access channel of the uplink primary cell;
the base station configures different preamble indexes and/or different preamble formats of preambles for part or all of the serving carriers of the UE.
8. The method of claim 7, wherein the maximum number of transmissions of the preamble configured by the base station for some or all serving carriers of the UE is different.
9. The method according to any one of claims 1 to 2, further comprising:
when the UE finds that the beam of the primary cell fails and executes the beam failure recovery process, but the beam recovery fails, the UE triggers RRC connection reestablishment.
10. An apparatus for performing beam failure recovery, comprising:
a receiving unit, configured to receive a preamble configured by a base station for a part or all of service carriers of a UE and used for sending a beam failure recovery request when the base station configures carrier aggregation for the UE;
a sending unit, configured to send a beam failure recovery request to a base station through a preamble corresponding to at least one service carrier configured with the preamble when detecting that a beam failure occurs in the service carrier, so that the base station identifies the service carrier where the beam failure occurs according to the preamble and sends a beam failure recovery response on the service carrier;
and the detection unit is used for detecting the beam failure recovery response sent by the base station and recovering the communication of the service carrier with the base station when the beam failure recovery response is detected.
11. The apparatus of claim 10, wherein the receiving unit is further configured to receive a reference signal of a sounding beam failure, a threshold of a number of beam failure times, a reference signal of a potential beam, and a threshold, which are configured by a base station for some or all service carriers of the UE.
12. The apparatus of claim 10 or 11, wherein the receiving unit is further configured to receive a maximum number of transmissions of a preamble configured by the base station for some or all serving carriers of the UE for transmitting the beam failure recovery request.
13. The apparatus according to any of claims 10 to 11, wherein the receiving unit is further configured to receive a CORESET configuration of a detection beam failure recovery response configured by a base station for some or all serving carriers of a UE;
and the detection unit is used for detecting the beam failure recovery response sent by the base station according to the CORESET configuration of the detection beam failure recovery response.
14. The apparatus according to any one of claims 10 to 11, wherein the receiving unit is further configured to receive uplink random access resource configuration of some or all service carriers transmitted by a base station;
and the sending unit is configured to send a beam failure recovery request to a base station according to the uplink random access resource configuration of the serving carrier through the preamble corresponding to the serving carrier.
15. The apparatus of claim 14, wherein the random access resource configuration comprises: time slot configuration of random access, frequency position of random access and corresponding relation between random access resources and synchronous signal blocks.
16. The apparatus according to any of claims 10 to 11, wherein the preambles configured by the base station for some or all of the serving carriers of the UE for transmitting the beam failure recovery request are all applied to the random access channel of the uplink primary cell;
the base station configures different preamble indexes and/or different preamble formats of preambles for part or all of the serving carriers of the UE.
17. The apparatus of claim 16, wherein the base station configures the preambles for some or all of the serving carriers of the UE with different maximum transmission times.
18. The apparatus of any one of claims 10 to 11, further comprising:
and the triggering unit is used for triggering RRC connection reestablishment when the UE finds that the beam of the primary cell fails and executes a beam failure recovery process but the beam recovery fails.
19. A user equipment, characterized in that the user equipment comprises the apparatus for implementing beam failure recovery according to any one of claims 10 to 18.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810023574.9A CN110022611B (en) | 2018-01-10 | 2018-01-10 | Method and device for realizing beam failure recovery and user equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810023574.9A CN110022611B (en) | 2018-01-10 | 2018-01-10 | Method and device for realizing beam failure recovery and user equipment |
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| Publication Number | Publication Date |
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| CN110022611A CN110022611A (en) | 2019-07-16 |
| CN110022611B true CN110022611B (en) | 2022-10-28 |
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| CN114223243A (en) * | 2019-10-23 | 2022-03-22 | Oppo广东移动通信有限公司 | Indication method, terminal equipment and network equipment |
| CN112788754B (en) * | 2019-11-07 | 2022-08-02 | 维沃移动通信有限公司 | Information transmission method and equipment |
| CN112788642B (en) * | 2019-11-07 | 2024-02-27 | 联发科技股份有限公司 | Beam fault recovery method and user equipment |
| CN110798302B (en) * | 2019-11-14 | 2021-10-22 | 展讯通信（上海）有限公司 | MAC CE transmission method and device for auxiliary cell beam failure recovery and storage medium |
| US11659416B2 (en) * | 2019-11-15 | 2023-05-23 | Qualcomm Incorporated | Beam reset rule in case of group component carrier based beam update |
| CN113259973B (en) * | 2020-02-07 | 2022-11-22 | 维沃移动通信有限公司 | Beam failure recovery method, terminal and network equipment |
| CN115699602A (en) * | 2020-05-26 | 2023-02-03 | 高通股份有限公司 | Beam failure recovery for multiple transmit/receive points in a primary cell |
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| R1-1710058 "Consideration on DL beam failure and recovery";CATT;《3GPP TSG RAN WG1 NR Ad-Hoc#2》;20170617;全文 * |
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