US Patent No. 10,798,741

MULTI-CARRIER LISTEN BEFORE TALK


Patent No. 10,798,741
Issue Date October 06, 2020
Title Multi-carrier Listen Before Talk
Inventorship Abhijeet Bhorkar, Fremont, CA (US)
Hwan-Joon Kwon, Portland, OR (US)
Christian Ibars Casas, San Jose, CA (US)
Assignee Intel IP Corporation, Santa Clara, CA (US)

Claim of US Patent No. 10,798,741

1. An apparatus of an evolved node B (eNB), the eNB configured for Licensed Assisted Access (LAA) secondary cell (Scell) transmissions on multiple carriers, the apparatus comprising: processing circuitry; and memory,wherein the processing circuitry is configured to:
perform a channel access procedure on each carrier of a plurality of carriers before an LAA Scell transmission on multiple carriers, wherein the channel access procedure for each carrier for a physical downlink shared channel (PDSCH) transmission comprises:
first sensing a channel to be idle during slot durations of a defer duration;
decrementing a counter and sensing the channel to be idle for an additional slot duration; and
sense the channel until either a busy slot is detected within an additional defer duration or all the slots of the additional defer duration are detected to be idle; and
encode the PDSCH for transmission on the plurality of carriers, if the channel is sensed to be idle for at least in a slot duration when the eNB is ready to transmit the PDSCH and if the channel has been sensed to be idle during all the slot durations of a defer duration immediately before the transmission, and
wherein the memory is configured to store a value indicating the defer duration immediately before the transmission.