Title:
適応アンテナを用いた通信ハンドオフ
Document Type and Number:
Japanese Patent JP2008535404
Kind Code:
A
Abstract:
One implementation provides a novel station-to-station handoff using an adaptive or directional antenna. The directional antenna generates a plurality of directional search beams to search for pilot signals from new base stations. The search beams are scanned one beam at a time to obtain the relative direction of all new base stations detected. From the detected base stations, a new base station with the strongest signal strength is selected and compared to the currently used base station. If the new base station has stronger signal strength than the current base station, then a communication handoff from the current base station to the new base station is initiated. In one feature of the present invention, two directional beams are used to communicate with the current and new base stations. Once a communication link is established with the new base station, the directional beam to the current base station is terminated.
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Inventors:
Jalali, Ahmad
Application Number:
JP2008504366A
Publication Date:
August 28, 2008
Filing Date:
March 27, 2006
Export Citation:
Assignee:
QUALCOMM INCORPORATED
International Classes:
H04B7/10; H04B7/26; H04W36/08; H04W16/24; H04W16/28; H04W36/36; H04W84/06; H04W88/02
Domestic Patent References:
| JP2005039552A | 2005-02-10 | |||
| JP2001094496A | 2001-04-06 | |||
| JPH10256971A | 1998-09-25 |
Foreign References:
| US20020137538A1 | 2002-09-26 |
Attorney, Agent or Firm:
Takehiko Suzue
Satoshi Kono
Makoto Nakamura
Kurata Masatoshi
Takashi Mine
Yoshihiro Fukuhara
Toshio Shirane
Sadao Muramatsu
Nobuhisa Nogawa
Katsu Sunagawa
Ryo Hashimoto
Tetsuya Kazama
Satoshi Kono
Makoto Nakamura
Kurata Masatoshi
Takashi Mine
Yoshihiro Fukuhara
Toshio Shirane
Sadao Muramatsu
Nobuhisa Nogawa
Katsu Sunagawa
Ryo Hashimoto
Tetsuya Kazama