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1. US20040008645 - Efficient handoffs between cellular and wireless local area networks

Office
États-Unis d'Amérique
Numéro de la demande 10324551
Date de la demande 20.12.2002
Numéro de publication 20040008645
Date de publication 15.01.2004
Numéro de délivrance 7583632
Date de délivrance 01.09.2009
Type de publication B2
CIB
H04L 12/28
HÉLECTRICITÉ
04TECHNIQUE DE LA COMMUNICATION ÉLECTRIQUE
LTRANSMISSION D'INFORMATION NUMÉRIQUE, p.ex. COMMUNICATION TÉLÉGRAPHIQUE
12Réseaux de données à commutation
28caractérisés par la configuration des liaisons, p.ex. réseaux locaux ou réseaux étendus
H04W 36/00
HÉLECTRICITÉ
04TECHNIQUE DE LA COMMUNICATION ÉLECTRIQUE
WRÉSEAUX DE TÉLÉCOMMUNICATIONS SANS FIL
36Dispositions pour le transfert ou la resélection
H04W 36/14
HÉLECTRICITÉ
04TECHNIQUE DE LA COMMUNICATION ÉLECTRIQUE
WRÉSEAUX DE TÉLÉCOMMUNICATIONS SANS FIL
36Dispositions pour le transfert ou la resélection
14Resélection d'un réseau ou d'une interface hertzienne
CPC
H04W 36/0033
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
WWIRELESS COMMUNICATION NETWORKS
36Hand-off or reselection arrangements
0005Control or signalling for completing the hand-off
0011for data session or connection
0033with transfer of context information
H04W 36/0066
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
WWIRELESS COMMUNICATION NETWORKS
36Hand-off or reselection arrangements
0005Control or signalling for completing the hand-off
0055Transmission and use of information for re-establishing the radio link
0066of control information between different types of networks in order to establish a new radio link in the target network
Déposants Nortel Networks Limited
Inventeurs Janevski Goran
Syed Hamid
Gage Bill
Mandataires Withrow &; Terranova, P.L.L.C.
Titre
(EN) Efficient handoffs between cellular and wireless local area networks
Abrégé
(EN)

The present invention facilitates a handoff between cellular and wireless local area networks (WLANs). To facilitate a WLAN interface with the cellular network, a proxy packet control function (P-PCF) establishes a data tunnel to a packet data serving node (PDSN), as well as a WLAN association with a mobile terminal. The WLAN association is a tunnel, and is preferably implemented via an Access Router acting as a liaison between the proxy PCF and an Access Point. The Access Router and the proxy PCF establish an IP tunnel, which carries the WLAN user's PPP traffic. Handoffs between the cellular and WLAN networks are facilitated by effecting a same-PDSN, inter-PCF handoff wherein the communication session with the mobile terminal is effectively changed from between the PDSN and the proxy PCF to between the PDSN and a PCF associated with a base station controller facilitating the cellular access, and vice versa.