Title:
信号エネルギー測定に基づいて複数のキャリア間で選択するための方法及び装置
Document Type and Number:
Japanese Patent JP4971140
Kind Code:
B2
Abstract:
Carrier frequency selection and handoff initiation methods in wireless communications systems employing multiple carrier frequencies are described. Although the receiver is tuned to a single band, based on the relative energy of one or more beacon signal components corresponding to the currently used carrier and one or more beacon signal components corresponding to an alternative carrier, a carrier selection and a handoff determination is made. Mobile nodes can use a single RF chain with a controllable RF filter to receive and process a signal within a first selected carrier band including components from different transmitters, e.g., a first signal component identified with the first currently selected band and a second signal component identified with a second alternative band.; The signal components, e.g., beacon signal components from different transmitters may be obtained from a signal which corresponds to multiple symbol transmission time periods. Separate signal energy measurements are performed on the first and second signal components. The signal component energy is compared, and a determination is made as to whether a handoff should be initiated.
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Inventors:
Laroya, Rajib
Lee, Juni
Lane, Franklin A.
Lee, Juni
Lane, Franklin A.
Application Number:
JP2007508326A
Publication Date:
July 11, 2012
Filing Date:
October 15, 2004
Export Citation:
Assignee:
QUALCOMM INCORPORATED
International Classes:
H04J11/00; H04B1/00; H04B1/10; H04B1/38; H04B1/40; H04B15/00; H04B17/00; H04B17/40; H04J1/00; H04L1/20; H04L5/02; H04L27/26; H04W36/08; H04W72/02; H04W36/30
Domestic Patent References:
| JP11113049A | ||||
| JP200194529A | ||||
| JP2003283458A |
Attorney, Agent or Firm:
Kurata Masatoshi
Satoshi Kono
Makoto Nakamura
Yoshihiro Fukuhara
Takashi Mine
Toshio Shirane
Sadao Muramatsu
Nobuhisa Nogawa
Kocho Chojiro
Naoki Kono
Katsu Sunagawa
Katsumura Hiro
Tatsushi Sato
Takashi Okada
Mihoko Horiuchi
Takenori Masanori
Takuzo Ichihara
Yamashita Gen
Satoshi Kono
Makoto Nakamura
Yoshihiro Fukuhara
Takashi Mine
Toshio Shirane
Sadao Muramatsu
Nobuhisa Nogawa
Kocho Chojiro
Naoki Kono
Katsu Sunagawa
Katsumura Hiro
Tatsushi Sato
Takashi Okada
Mihoko Horiuchi
Takenori Masanori
Takuzo Ichihara
Yamashita Gen