US Patent No. 10,893,548

PHYSICAL RANDOM ACCESS CHANNEL DESIGN FOR LICENSED ASSISTED ACCESS


Patent No. 10,893,548
Issue Date January 12, 2021
Title Physical Random Access Channel Design For Licensed Assisted Access
Inventorship Qiaoyang Ye, Fremont, CA (US)
Jeongho Jeon, San Jose, CA (US)
Seau S. Lim, South Wales (GB)
Huaning Niu, San Jose, CA (US)
Abhijeet Bhorkar, Fremont, CA (US)
Assignee Intel IP Corporation, Santa Clara, CA (US)

Claim of US Patent No. 10,893,548

1. An apparatus configured to be employed within one or more evolved Node Bs (eNodeBs), the apparatus comprising:control circuitry configured to generate a physical downlink control channel (PDCCH), wherein the PDCCH includes a PDCCH order for contention free PRACH transmission using a license assisted access (LAA) secondary cell, and generate a random access response (RAR) within a RAR window using the secondary cell; and
a transceiver configured to retry transmission of the PDCCH order upon a listen before talk (LBT) failure using a primary cell after a number of retries of the transmission of the PDCCH order using the secondary cell.