US 10,368,363 B2
Uplink data transmission method in wireless communication system and device therefor
Jonghyun Park, Seoul (KR); Joonkui Ahn, Seoul (KR); Seonwook Kim, Seoul (KR); Kijun Kim, Seoul (KR); Hanbyul Seo, Seoul (KR); and Hanjun Park, Seoul (KR)
Assigned to LG Electronics Inc., Seoul (KR)
Appl. No. 15/565,804
Filed by LG ELECTRONICS INC., Seoul (KR)
PCT Filed Apr. 18, 2016, PCT No. PCT/KR2016/004000
§ 371(c)(1), (2) Date Oct. 11, 2017,
PCT Pub. No. WO2016/167623, PCT Pub. Date Oct. 20, 2016.
Claims priority of provisional application 62/148,702, filed on Apr. 16, 2015.
Prior Publication US 2018/0110057 A1, Apr. 19, 2018
Int. Cl. H04W 72/12 (2009.01); H04B 7/0452 (2017.01); H04W 16/14 (2009.01); H04W 74/08 (2009.01); H04B 7/0404 (2017.01); H04W 74/00 (2009.01)
CPC H04W 72/12 (2013.01) [H04B 7/0404 (2013.01); H04B 7/0452 (2013.01); H04W 16/14 (2013.01); H04W 74/0808 (2013.01); H04W 74/006 (2013.01)] 11 Claims
OG exemplary drawing
 
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.