US Patent No. 11,032,850


Patent No. 11,032,850
Issue Date June 08, 2021
Title Prach And/or Srs Switching Enhancements
Inventorship Alberto Rico Alvarino, San Diego, CA (US)
Peter Gaal, San Diego, CA (US)
Wanshi Chen, San Diego, CA (US)
Hao Xu, San Diego, CA (US)
Jing Sun, San Diego, CA (US)
Assignee Qualcomm Incorporated, San Diego, CA (US)

Claim of US Patent No. 11,032,850

1. A method for wireless communications by a user equipment (UE), comprising:receiving on a first component carrier (CC) a first physical downlink control channel (PDCCH) order for a first physical random access channel (PRACH) transmission;
determining a transmit power for the first PRACH transmission, based on a retransmission index of the first PRACH transmission;
transmitting the first PRACH on a second CC at the determined transmit power, comprising interrupting communication on the first CC to switch from the first CC to the second CC; and
after transmitting the first PRACH, receiving a second PDCCH order on the first CC before (i) interrupting communication again on the first CC to switch from the first CC to the second CC and (ii) transmitting a second PRACH on the second CC, wherein the second PDCCH order comprises information for triggering the second PRACH.