US Patent No. 10,368,363


Patent No. 10,368,363
Issue Date July 30, 2019
Title Uplink Data Transmission Method In Wireless Communication System And Device Therefor
Inventorship Jonghyun Park, Seoul (KR)
Joonkui Ahn, Seoul (KR)
Seonwook Kim, Seoul (KR)
Kijun Kim, Seoul (KR)
Hanbyul Seo, Seoul (KR)
Hanjun Park, Seoul (KR)
Assignee LG Electronics Inc., Seoul (KR)

Claim of US Patent No. 10,368,363

1. A method of transmitting, by a first user equipment (UE), uplink (UL) data in an unlicensed band in a wireless communication system, the method comprising:receiving, from an evolved NodeB (eNB), UL scheduling information on a cell operating in an unlicensed band;
sensing whether a channel of the cell is in an idle state based on the energy of one or more signals;
receiving, from the eNB, clear channel assessment (CCA) configuration information for detecting a first reservation signal transmitted by a second UE co-scheduled with the first UE for a UL multi-user multiple input multiple output (MU-MIMO) transmission;
detecting the first reservation signal based on the CCA configuration;
cancelling the detected first reservation signal among the one or more signals,
transmitting, to the eNB, a second reservation signal when the channel is in the idle state; and
transmitting, to the eNB, the UL data on the channel based on the UL scheduling information,
wherein a sequence of the second reservation signal is determined based on a predetermined layer index and a value of a cyclic shift field within the UL scheduling information, and
wherein a sequence of the first reservation signal is determined based on a layer index other than the predetermined layer index and the value of the cyclic shift field within the uplink scheduling information.