無線通信のための拡張された移動度サポート

Japanese Patent JP4971428

B2

Techniques for quickly and efficiently performing handover are described. A user equipment (UE) may maintain a link with a serving cell and may communicate with this cell via the established link. The UE may have a candidate set of non-serving cells that are candidates for handover. The UE may maintain uplink synchronization with one or more non-serving cells in the candidate set, without having to maintain links with any of the non-serving cells. The UE may update uplink synchronization with the non-serving cells via an access procedure, e.g., send access probes to the non-serving cells and receive timing adjustments from these cells. One non-serving cell with which the UE has maintained uplink synchronization may be selected as a target cell for handover. The UE may then perform handover from the serving cell to the target cell, without performing uplink synchronization during the handover, which may improve handover latency and success rate.

Floret, Oronzo
Maladi, Darga Prasad
Chaponier, Etienne F.
Grilli, Francesco

JP2009507943A

July 11, 2012

April 25, 2007

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QUALCOMM INCORPORATED

H04W36/08; H04W36/00; H04W36/30; H04W56/00; H04W36/18; H04W76/02; H04W76/04; H04W88/02

JP10126830A
JP2005278193A
JP2006510279A

Kurata Masatoshi
Takakura Shigeo
Satoshi Kono
Makoto Nakamura
Yoshihiro Fukuhara
Takashi Mine
Toshio Shirane
Sadao Muramatsu
Nobuhisa Nogawa
Kocho Chojiro
Naoki Kono
Katsu Sunagawa
Morisezo Iseki
Tatsushi Sato
Takashi Okada
Mihoko Horiuchi
Takenori Masanori

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