US 12,193,063 B2
Beam switching method and apparatus
Deshan Miao, Beijing (CN); and Shaohui Sun, Beijing (CN)
Assigned to DATANG MOBILE COMMUNICATIONS EQUIPMENT CO., LTD., Beijing (CN)
Appl. No. 17/607,416
Filed by DATANG MOBILE COMMUNICATIONS EQUIPMENT CO., LTD., Beijing (CN)
PCT Filed Mar. 25, 2020, PCT No. PCT/CN2020/081238
§ 371(c)(1), (2) Date Oct. 29, 2021,
PCT Pub. No. WO2020/220871, PCT Pub. Date Nov. 5, 2020.
Claims priority of application No. 201910364302.X (CN), filed on Apr. 30, 2019.
Prior Publication US 2022/0225421 A1, Jul. 14, 2022
Int. Cl. H04W 74/0833 (2024.01); H04B 7/08 (2006.01); H04W 36/00 (2009.01)
CPC H04W 74/0833 (2013.01) [H04B 7/088 (2013.01); H04W 36/0072 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A beam switching method applied to a terminal side, comprising:
determining that beam switching needs to be performed upon receiving a beam switching command sent by a network equipment, and obtaining a beam identifier of a target beam and a Physical Random Access Channel, PRACH, resource indication from the beam switching command;
sending a PRACH signal for indicating that beam switching is completed to the network equipment on a time-frequency resource of the target beam indicated by a PRACH resource indication, after the beam switching is completed;
wherein, the beam switching command is a Bandwidth Part, BWP, switching command, when downlink control information, DCI, signaling used for switching of adjacent BWPs comprises a resource indication for the terminal to perform beam indication in a switched BWP, different beams correspond to different BWPs in a one-to-one manner, and each BWP comprises one Beam specific Reference Signal, BRS, symbol for downlink synchronization and beam capture to help the terminal to establish the downlink time and frequency synchronization; wherein after obtaining the beam identifier of the switched beam and the PRACH resource indication, and before sending the PRACH signal for indicating that beam switching is completed to the network equipment on time-frequency resources of the switched beam indicated by the PRACH resource indication, the method further comprises: detecting a BRS on a BWP comprised in the BWP switching command, obtaining a downlink synchronization signal and beam capture, and performing the downlink synchronization with the BWP comprised in the BWP switching command;
or
the beam switching command is a dynamic carrier switching command, when an adjacent beam is regarded as a new carrier and the adjacent beam is frequency division multiplexed.