Electronic device and method for wireless communication, and computer-readable storage medium
An electronic device and a method for wireless communication, and a computer-readable storage medium. The electronic device comprises: a processing circuit, configured to: acquire, from a base station, configuration information containing a first candidate beam set for beam failure recovery, the first candidate beam set comprising candidate beams of a serving cell and candidate beams of a non-serving cell; and determine, on the basis of the first candidate beam set and/or a second candidate beam set, an identification candidate beam to be used for beam failure recovery, the second candidate beam set comprising beams which serve as candidate beams of the non-serving cell and are detected by user equipment.
1. An electronic apparatus for wireless communications, comprising:
processing circuitry, configured to:
acquire, from a base station, configuration information comprising a first candidate beam set for beam failure recovery, wherein the first candidate beam set comprises a candidate beam from a first transmission point and a candidate beam of a second transmission point; and
determine, based on the first candidate beam set or a second candidate beam set, an identified candidate beam to be used for the beam failure recovery, wherein the second candidate beam set comprises a beam of a non-serving cell which serves as a candidate beam and is detected by user equipment,
wherein the configuration information comprises an index of a reference signal corresponding to the candidate beam and a physical cell identification of a cell corresponding to the reference signal.
2. The electronic apparatus according to claim 1 , wherein the second candidate beam set comprises a beam corresponding to a synchronization signal block of a non-serving cell which is detected by the user equipment.
3. The electronic apparatus according to claim 1 , wherein the processing circuitry is configured to determine the candidate beam of a non-serving cell in the second candidate beam set as the identified candidate beam in the following conditions:
beam quality of the candidate beam of the first transmission point being lower than predetermined quality; and
beam quality of the candidate beam of the non-serving cell being higher than the beam quality of the candidate beam of the first transmission point by more than a predetermined value.
4. The electronic apparatus according to claim 3 , wherein the processing circuitry is further configured to acquire, from the base station, settings of the predetermined quality and the predetermined value.
5. The electronic apparatus according to claim 1 , wherein, in a case that the identified candidate beam is a candidate beam of a non-serving cell in the second candidate beam set, the processing circuitry is configured to acquire, from the base station, radio resources control reconfiguration information for the non-serving cell during the beam failure recovery procedure.
6. The electronic apparatus according to claim 5 , wherein the radio resources control reconfiguration information for the non-serving cell is comprised in a beam failure recovery request response transmitted by the base station.
7. The electronic apparatus according to claim 1 , wherein the reference signal is one of a synchronization signal block and a channel state information reference signal.
8. The electronic apparatus according to claim 1 , wherein the candidate beam in the first candidate beam set comprises a beam corresponding to a reference signal for mobility management configured by the base station for the user equipment.
9. The electronic apparatus according to claim 1 , wherein the processing circuitry is further configured to determine a physical cell identification of a cell corresponding to the candidate beam in the second candidate beam set by decoding a primary synchronization signal or a secondary synchronization signal.
10. The electronic apparatus according to claim 1 , wherein, in a case that the identified candidate beam comprises a candidate beam in the second candidate beam set, the processing circuitry is further configured to provide, to the base station, information of the candidate beam belonging to the second candidate beam set which is comprised in the identified candidate beam and a physical cell identification of a cell corresponding to the candidate beam.
11. The electronic apparatus according to claim 10 , wherein the processing circuitry is configured to provide information of the identified candidate beam by transmitting MAC CE on a physical uplink shared channel.
12. The electronic apparatus according to claim 1 , wherein, the processing circuitry is further configured to acquire, from the base station, information of a first threshold and a second threshold, wherein
in a case that the number of times of occurrences of beam failure event instances reaches or exceeds the first threshold, the processing circuitry starts determination of the identified candidate beam; in a case that the number of times of occurrences of the beam failure event instances reaches or exceeds the second threshold, the processing circuitry determines that a beam failure event occurs and starts a beam failure recovery procedure,
wherein the first threshold is smaller than or equal to the second threshold.
13. The electronic apparatus according to claim 12 , wherein the processing circuitry is configured to:
establish a first counter and a second counter respectively to count the number of times of occurrences of the beam failure event instances, compare a count value of the first counter with the first threshold, and compare a count value of the second counter with the second threshold.
14. The electronic apparatus according to claim 12 , wherein the processing circuitry is configured to acquire, from the base station, information of the first threshold and the second threshold through radio resources control signaling.
15. An electronic apparatus for wireless communications, comprising:
processing circuitry, configured to:
provide, to user equipment, configuration information comprising a first candidate beam set for beam failure recovery, wherein the first candidate beam set comprises a candidate beam of a first transmission point and a candidate beam of a second transmission point; and
acquire, from the user equipment, information of an identified candidate beam to be used for the beam failure recovery determined by the user equipment based on the first candidate beam set or a second candidate beam set, wherein the second candidate beam set comprises a beam of a non-serving cell which serves as a candidate beam and is detected by the user equipment,
wherein the configuration information comprises an index of a reference signal corresponding to the candidate beam and a physical cell identification of a cell corresponding to the reference signal.
16. The electronic apparatus according to claim 15 , wherein the processing circuitry is further configured to provide conditions for the candidate beam of the non-serving cell being determined as the identified candidate beam to the user equipment, and the conditions comprise:
beam quality of the candidate beam of the serving cell being lower than predetermined quality; and
beam quality of the candidate beam of the non-serving cell being higher than the beam quality of the candidate beam of the first transmission point by more than a predetermined value.
17. The electronic apparatus according to claim 15 , wherein in a case that the identified candidate beam is a candidate beam of a non-serving cell in the second candidate beam set, the processing circuitry is configured to transmit a handover request to the non-serving cell and receive a handover request acknowledgement from the non-serving cell upon receiving a beam failure recovery request from the user equipment during a beam failure recovery procedure, and provide radio resources control reconfiguration information for the non-serving cell to the user equipment.
18. The electronic apparatus according to claim 17 , wherein the processing circuitry is configured to comprise the radio resources control reconfiguration information for the non-serving cell in a beam failure recovery request response to be provided to the user equipment.
19. A method for wireless communications, the method performed by an electronic apparatus and comprising:
acquiring, from a base station, configuration information comprising a first candidate beam set for beam failure recovery, wherein the first candidate beam set comprises a candidate beam of a first transmission point and a candidate beam of a second transmission point; and
determining, based on the first candidate beam set or a second candidate beam set, an identified candidate beam to be used for the beam failure recovery, wherein the second candidate beam set comprises a beam of a non-serving cell which serves as a candidate beam and is detected by the user equipment,
wherein the configuration information comprises an index of a reference signal corresponding to the candidate beam and a physical cell identification of a cell corresponding to the reference signal.