Invention Grant
- Patent Title: Method and apparatus for performing inter-MeNB handover without SeNB change in wireless communication system
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Application No.: US16255732Application Date: 2019-01-23
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Publication No.: US10588065B2Publication Date: 2020-03-10
- Inventor: Jian Xu , Daewook Byun
- Applicant: LG ELECTRONICS INC.
- Applicant Address: KR Seoul
- Assignee: LG ELECTRONICS INC.
- Current Assignee: LG ELECTRONICS INC.
- Current Assignee Address: KR Seoul
- Agency: Lee, Hong, Degerman, Kang & Waimey PC
- Main IPC: H04W36/18
- IPC: H04W36/18 ; H04W36/30 ; H04W36/08 ; H04W76/15 ; H04W76/19 ; H04W88/08 ; H04W92/20 ; H04W36/00 ; H04W88/06

Abstract:
A method and apparatus for performing an inter-master eNodeB (MeNB) handover procedure without secondary eNB (SeNB) change in a wireless communication system is provided. A source MeNB transmits a handover request message including a first indication of a SeNB to a target MeNB. The first indication may correspond to a SeNB identifier (ID). Upon receiving the handover request message including the first indication, the target MeNB transmits a SeNB addition request message including a second indication of a UE, served by the SeNB, to the SeNB. The second indication may correspond to an old SeNB UE X2AP ID, which was allocated by the SeNB. Upon receiving the SeNB addition request message including the second indication, the SeNB may transmit a SeNB addition acknowledge message including a third indication of keeping bearers of the SeNB from the SeNB.
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