Handoff between a wireless local area network and a cellular...

Details Handoff between a wireless local area network and a cellular... Handoff between a wireless local area network and a cellular...

H - Electricity

04

W

H04W 36/30 (2009.01) H04W 88/06 (2009.01)

Patent

CA 2543149

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.

La présente invention concerne un transfert entre un réseau local sans fil et un système de communication cellulaire. Ce système est conçu pour offrir des services cellulaires mobiles, y compris un service vocal sur I.E.E.E. 802.11. Un réseau 802.11 est utilisé tant que la qualité vocale est susceptible d'être acceptable. La qualité vocale est mesurée et est maintenue à un niveau acceptable. Si cette qualité vocale se dégrade en-dessous d'un niveau acceptable, la structure permet par exemple un transfert d'appel direct entre le réseau 802.11 et un réseau 1xRTT CDMA.

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