US Patent No. 10,462,819

MULTI-CARRIER LISTEN BEFORE TALK


Patent No. 10,462,819
Issue Date October 29, 2019
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. 10,462,819

1. An apparatus of an evolved node B (eNB) for multi-carrier operation for license-assisted access (LAA) communications between the eNB and a user equipment (UE), the apparatus comprising:an interface to access a primary channel, the interface circuitry further configured to access a plurality of secondary channels on which LAA transmissions are performed, at least one channel of the plurality of secondary channels configured for long term evolution (LTE) communications; and
circuitry coupled to the interface and configured to:
select a first secondary channel of the plurality of secondary channels;
perform a first channel access procedure for the first secondary channel;
initiate transmission on the first secondary channel in response to the first channel access procedure detecting that the first secondary channel is idle in accordance with the first channel access procedure;
perform a second channel access procedure for a second secondary channel of the plurality of secondary channels, wherein the second channel access procedure is different than the first channel access procedure, and wherein the second channel access procedure occurs prior to the transmission on the first secondary channel; and
initiate transmission on the second channel in response to the second channel access procedure detecting that the second secondary channel is idle in accordance with the second channel access procedure,
wherein the first and second channel access procedures are contention based and the circuitry is configured to maintain a common contention window for all the secondary channels of the plurality of secondary channels,
wherein the primary channel and the secondary channels comprise component carriers, and
wherein the interface is configured to communicate over the primary channel within scheduled subframes without performing a clear channel access procedure.