DATA FORWARDING METHOD AND SYSTEM FOR VERTICAL HANDOVER

A data forwarding method and system is provided for avoiding data loss during a vertical handover by forwarding data through an IP tunnel established between a newly introduced network entity called a Data Forwarding Function of the serving network and a Forward Attachment Function of a target netwo...

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Bibliographic Details
Main Authors LEE DAE YOUNG, SONG WILLIAM JIN HO, CHUNG JONG MOON, LIM CHAE GWON, CHOI SUNG HO, YEOUM TAE SUN
Format Patent
LanguageEnglish
Published 01.09.2011
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
WIRELESS COMMUNICATIONS NETWORKS
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Summary:A data forwarding method and system is provided for avoiding data loss during a vertical handover by forwarding data through an IP tunnel established between a newly introduced network entity called a Data Forwarding Function of the serving network and a Forward Attachment Function of a target network. A data forwarding method of a data forwarding unit located in a serving network for a vertical handover according to the present invention includes receiving an address of a forwarding attachment unit located in a target network and a data forwarding preparation request that are transmitted by a user equipment; establishing an Internet Protocol (IP) tunnel to the forwarding attachment unit according to the data forwarding preparation request; and forwarding, when a vertical handover is initiated, handover packets to the forwarding attachment unit through the IP tunnel.
Bibliography:Application Number: US200913127095