Title:
APPARATUS AND MECHANISM TO IMPROVE MOBILITY ROBUSTNESS IN WIRELESS NETWORK
Document Type and Number:
WIPO Patent Application WO/2020/087371
Kind Code:
A1
Abstract:
These disclosed embodiments describe a method for a UE and network to perform normal HO and conditional HO. In one novel aspect, if one type of HO command, e. g. conditional HO command is received, UE begins to verify the conditions of the candidate cell (s). If the condition for at least one candidate cell is met, UE considers this candidate cell as the target cell to perform handover. Then UE sends the HO start indication message to the source cell indicating that UE will detach from the source cell and initiate the random access procedure towards the target cell. From the network side, the source gNB determine whether to perform normal HO or conditional HO. If conditional HO is performed, the source gNB receives one or more HO request ACK from one or more candidate gNBs. Then the source gNB generate the conditional HO considering the information received from the one or more candidate gNBs. In one embodiment, the SN status transfer procedure is initiated upon reception of the SN status transfer request from one of the candidate gNB; in one embodiment, the SN status transfer procedure is initiated upon reception of the HO start indication message from the UE side.
Inventors:
ZHANG YUANYUAN (CN)
TSENG LI-CHUAN (CN)
LIU YUNG-HSIANG (CN)
TSENG LI-CHUAN (CN)
LIU YUNG-HSIANG (CN)
Application Number:
PCT/CN2018/113124
Publication Date:
May 07, 2020
Filing Date:
October 31, 2018
Export Citation:
Assignee:
MEDIATEK SINGAPORE PTE LTD (SG)
ZHANG YUANYUAN (CN)
TSENG LI CHUAN (CN)
LIU YUNG HSIANG (CN)
ZHANG YUANYUAN (CN)
TSENG LI CHUAN (CN)
LIU YUNG HSIANG (CN)
International Classes:
H04W36/00
Foreign References:
| CN108632926A | 2018-10-09 |
Other References:
VIVO: "Signaling procedure for conditional handover", 3GPP DRAFT R2-1814194, 12 October 2018 (2018-10-12), Chengdu, China, pages 1 - 4, XP051523648
ETRI: "Considerations on Conditional Handover", 3GPP DRAFT R2-1815244, 12 October 2018 (2018-10-12), Chengdu, China, pages 1 - 6, XP051524602
ETRI: "Considerations on Conditional Handover", 3GPP DRAFT R2-1815244, 12 October 2018 (2018-10-12), Chengdu, China, pages 1 - 6, XP051524602
Attorney, Agent or Firm:
BEIJING SANYOU INTELLECTUAL PROPERTY AGENCY LTD. (CN)
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