Title:
シームレス垂直ローミング制御方法およびプログラム記録媒体
Document Type and Number:
Japanese Patent JP2007520903
Kind Code:
A
Abstract:
A method and program for controlling seamless vertical roaming between a wireless local area network and a wireless wide area network in a personal communication unit are disclosed. The method includes assigning an Internet Protocol (IP) address by a Foreign Agent (FA); transmitting a Mobile IP (MIP) request message to the FA; receiving a MIP advertisement message from the FA; transmitting a MIP registration request message to the FA; receiving the first MIP address from the FA; determining whether the personal information device has left a WLAN area (hot spot); if the personal information device has left the WLAN area, terminating an operation of the WLAN device and connecting a Point-to-Point Protocol (PPP) session with a Packet Data Serving Node (PDSN) within the WLAN using dial-up networking of the wireless modem at the same time; and receiving a second MIP address from the PDSN. The program is configured to operate the method in a computer or a processor.
Inventors:
Han, San-u
Jun, Yong-Pill
Jun, Yong-Pill
Application Number:
JP2006515346A
Publication Date:
July 26, 2007
Filing Date:
July 02, 2004
Export Citation:
Assignee:
Katie Freetel Company Limited
International Classes:
H04L12/46; H04L29/06; H04L29/12; H04W60/00; H04W8/12; H04W80/04; H04W88/06
Attorney, Agent or Firm:
Kimura Mitsuru