無線ローカルエリアネットワークとセルラ通信システムとの間のハンドオフ

Title:

無線ローカルエリアネットワークとセルラ通信システムとの間のハンドオフ

Document Type and Number:

Japanese Patent JP4504379

Kind Code:

B2

Abstract:

Handoff between a wireless LAN and a cellular communication system is provided. A system is designed to provide nomadic cellular services including voice over I.E.E.E. 802.11. An 802.11 network is used as long as the voice quality is likely to be acceptable. Voice quality is measured and maintained to be at an acceptable level. If voice quality degrades below an acceptable level the design allows seamless call hand-off between the 802.11 and a CDMA 1xRTT network, for example.

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Inventors:

Jain, Nik Hill
Agrawal, Abniesh

Application Number:

JP2006536931A

Publication Date:

July 14, 2010

Filing Date:

October 25, 2004

Export Citation:

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Assignee:

QUALCOMM INCORPORATED

International Classes:

H04W36/14; H04W88/02; H04L12/28; H04L12/56; H04L29/06; H04W36/30; H04W36/36; H04W48/18; H04W24/00; H04W36/18; H04W84/04; H04W84/12; H04W88/08

Domestic Patent References:

JP2002534029A

Foreign References:

WO2002032179A1
WO2003073774A1

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

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