QUALCOMM Incorporated
FRONT-LOADED TRANSMISSION IN A RANDOM ACCESS CHANNEL PROCEDURE

Abstract:

Methods, systems, and devices for wireless communications are described. For instance, a user equipment (UE) may transmit a first message of a RACH procedure to a base station. The UE may receive a second message of the RACH procedure from the base station based on the first message. The UE may transmit a preamble, a reference signal, or both and a third message of the RACH procedure to the base station based on the second message. The UE may transmit the preamble, the reference signal, or both before transmission of the third message. In some cases, the UE may receive control signaling that indicates whether to transmit the preamble, the reference signal, both, or neither with the third message. Additionally or alternatively, the control signaling may indicate a resource for the preamble, the reference signal, or both and a resource for the third message.