QUALCOMM Incorporated
RANDOM ACCESS WITH BEAM REFINEMENT IN WIRELESS COMMUNICATIONS

Abstract:

Methods, systems, and devices for wireless communications are described in which a base station and a user equipment (UE) may use multiple transmissions associated with a random access procedure to refine a beam that is used for subsequent portions of the access procedure. A UE may transmit a random access request to the base station and, in response thereto, the base station may transmit a control channel order to the UE. The control channel order may indicate that the UE is to transmit a modified random access request to the base station. The base station may monitor for the modified random access request using different beamforming parameters in order to determine a refined beam to be used for a subsequent transmission in the random access procedure. The base station may then use the refined beam to transmit a random access response to the UE, and complete the access procedure.