Communication unit with a handoff

H - Electricity – 04 – W

Patent

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Details

H04W 36/00 (2009.01) H04W 36/18 (2009.01) H04W 88/06 (2009.01)

Patent

CA 2529556

A communication unit (10) includes a mobility agent (225) for providing handoffs between a cellular network and a wireless local area network (11). The communication unit (10) determines if it should switch between the wireless local area network (11) and the cellular network for obtaining service, requests a handoff to the wireless local area network (11) or to the cellular network by sending a SIP message addressed to either a public number (229) or a private number (231) associated with the communication unit (10) upon making the determination. The communication unit (10) accepts a new call from an enterprise server (12) over the determined network. Corresponding methods of providing a hand-off is described.

L'invention concerne une unité de communication (10) qui comprend un agent de mobilité (225) permettant d'assurer des transferts entre un réseau cellulaire et un réseau local sans fil (11). L'unité de communication (10) détermine s'il est nécessaire de procéder à une commutation entre le réseau local sans fil (11) et le réseau cellulaire pour obtenir le service, demande un transfert sur le réseau local sans fil (11) ou sur le réseau cellulaire en envoyant un message SIP adressé soit à un numéro public (229), soit à un numéro privé (231) associé à l'unité de communication (10) lorsque la détermination est accomplie. L'unité de communication (10) accepte un nouvel appel d'un serveur d'entreprise (12) via le réseau déterminé. L'invention concerne également des procédés correspondants permettant d'assurer un transfert.

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