US 10,368,381 B2
Method for terminal to establish multi-links in wireless communication system, and apparatus therefor
Genebeck Hahn, Seoul (KR); Heejeong Cho, Seoul (KR); Eunjong Lee, Seoul (KR); and Ilmu Byun, Seoul (KR)
Assigned to LG Electronics Inc., Seoul (KR)
Appl. No. 15/745,918
Filed by LG ELECTRONICS INC., Seoul (KR)
PCT Filed Jul. 27, 2015, PCT No. PCT/KR2015/007797
§ 371(c)(1), (2) Date Jan. 18, 2018,
PCT Pub. No. WO2017/018553, PCT Pub. Date Feb. 2, 2017.
Prior Publication US 2018/0199390 A1, Jul. 12, 2018
Int. Cl. H04W 76/15 (2018.01); H04W 56/00 (2009.01); H04W 76/14 (2018.01); H04W 76/27 (2018.01); H04W 88/04 (2009.01); H04W 8/00 (2009.01); H04W 24/08 (2009.01); H04B 7/26 (2006.01)
CPC H04W 76/15 (2018.02) [H04B 7/2606 (2013.01); H04W 56/0015 (2013.01); H04W 76/14 (2018.02); H04W 76/27 (2018.02); H04W 88/04 (2013.01); H04W 8/005 (2013.01); H04W 24/08 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A method for establishing multiple links through relay user equipments (UEs) by an UE which is out of coverage in a wireless communication system, the method comprising:
transmitting a radio resource control (RRC) connection request to a temporary relay UE having a highest device-to-device (D2D) signal quality among relay UEs located adjacent to the UE;
receiving, from the temporary relay UE, an RRC connection setup indicating a first base station (BS) that will provide a serving link to the UE and a second BS that will provide a replacement link to the UE among BSs to which the relay UEs are connected;
establishing the serving link through a first relay UE by transmitting an RRC connection complete message to the first relay UE connected to the first BS among the relay UEs; and
establishing the replacement link, where unicast data transmission and reception is inactivated, through a second relay UE connected to the second BS among the relay UEs.