Method and software for controlling seamless vertical roaming
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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N/A
Issued Date -
Jul 20, 2006
app pub date -
Jan 3, 2006
filing date -
Jul 2, 2003
priority date (Note) -
Abandoned
status (Latency Note)
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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.
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