Call hand-over in a wireless local area network

Details Call hand-over in a wireless local area network Call hand-over in a wireless local area network

2004-01-09

2008-07-15

Gary, Erika A. (Department: 2617)

Telecommunications

Radiotelephone system

Zoned or cellular telephone system

C455S436000, C455S437000

Reexamination Certificate

active

07400886

ABSTRACT:
A method and apparatus for automatically handing over calls between a wireless LAN and a non-WLAN, with minimum or no disruption of active calls. The invention gives users flexibility in customizing hand-over preferences and allows telephony features to be transferred during the hand-over.

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patent: 6584316 (2003-06-01), Akhteruzzaman et al.
patent: 2002/0085516 (2002-07-01), Bridgelall
patent: 2004/0264410 (2004-12-01), Sagi et al.
patent: 0 700 227 (1996-06-01), None
patent: WO 94/29992 (1994-12-01), None
Zhang et al., “Efficient Mobility Management for Vertical Handoff Between WWAN and WLAN”, IEEE Communications Magazine, IEEE Service Center, Piscataway, NJ, vol. 41, No. 11, Nov. 2003, pp. 102-108.
Liao et al., “VolP Mobility In IP/Cellular Network Internetworking”, IEEE Communications Magazine, IEEE Service Center, Piscataway, NJ, vol. 38, No. 4, Apr. 2000, pp. 70-75.

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