US 10,462,835 B2
Method and apparatus for performing location update for dual connectivity in wireless communication system
Jian Xu, Seoul (KR); and Daewook Byun, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Appl. No. 15/319,469
Filed by LG ELECTRONICS INC., Seoul (KR)
PCT Filed Jul. 10, 2015, PCT No. PCT/KR2015/007172
§ 371(c)(1), (2) Date Dec. 16, 2016,
PCT Pub. No. WO2016/006958, PCT Pub. Date Jan. 14, 2016.
Claims priority of provisional application 62/022,692, filed on Jul. 10, 2014.
Prior Publication US 2017/0325274 A1, Nov. 9, 2017
Int. Cl. H04W 76/15 (2018.01); H04W 8/14 (2009.01); H04W 76/11 (2018.01); H04L 5/00 (2006.01); H04W 36/00 (2009.01)
CPC H04W 76/15 (2018.02) [H04L 5/0035 (2013.01); H04W 8/14 (2013.01); H04W 76/11 (2018.02); H04W 36/0069 (2018.08)] 7 Claims
OG exemplary drawing
 
1. A method for performing serving gateway (S-GW) relocation in a wireless communication system, the method performed by a mobility management entity (MME) and comprising:
receiving location information of a serving small cell, which is served by a second evolved NodeB (eNB), from a first eNB which supports dual connectivity to a specific user equipment (UE) with the second eNB, wherein each of the first eNB and the second eNB is connected to a first S-GW;
transmitting the received location information of the serving small cell to a second S-GW, when the MME determines that the first S-GW of the second eNB should be changed to the second S-GW for an overload; and
performing the S-GW relocation based on the determination,
wherein after the S-GW relocation, the first S-GW is connected to the first eNB and the second S-GW is connected to the second eNB while a dual connectivity state between the first eNB and the second eNB is maintained.