Method and apparatus for link layer assisted handoff

Details Method and apparatus for link layer assisted handoff Method and apparatus for link layer assisted handoff

H - Electricity

04

W

H04W 36/02 (2009.01)

Patent

CA 2570726

Various embodiments are described to address the need for an apparatus and method that improves upon known handoff techniques, such as Mobile IP and Fast Mobile IP, to improve the mobility experience of an end user. OSI layer 2- originated indications of a handoff being imminent (301, 501, 502), a link down for handoff (307, 509, 510), and a new link up after handoff (309, 511, 512) are introduced. These indications can be used by applications (such as real-time/streaming applications on the mobile (101)) to take suitable proactive measures prior to an actual handoff. Examples of such measures include the buffering of data to be used during the handoff interval in a way that improves the seamless mobility experience of the end user.

L'invention concerne, dans divers modes de réalisation, un appareil et un procédé destinés à améliorer des techniques de transfert connues, telles que IP mobile et IP mobile rapide, afin d'améliorer l'expérience de mobilité de l'utilisateur final. Des indications de couche 2 OSI de l'imminence (301, 501, 502) d'un transfert, une liaison descendante de transfert (307, 509, 510), et une nouvelle liaison ascendante après le transfert (309, 511, 512) sont introduites. Ces indications peuvent être utilisées par des applications (par exemple des applications en temps réel/en continu sur le mobile (101)) pour prendre des mesures proactives adaptées avant le transfert. Ces mesures comprennent, par exemple, la mise en tampon des données utilisées pendant l'intervalle de transfert de manière à améliorer l'expérience de mobilité sans coupure de l'utilisateur final.

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