Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2005-08-16
2005-08-16
Trinh, Sonny (Department: 2687)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S442000, C455S439000, C455S433000, C455S437000, C455S432100, C370S331000, C370S328000, C370S395520
Reexamination Certificate
active
06931249
ABSTRACT:
To address the need for an apparatus and method for handoff from a cellular wireless network to a non-cellular wireless network (WLAN, e.g.), the present application describes an access gateway (214) and a dual mode mobile station (201) that enable such handoffs. The MS provides information to the access gateway so that it can initiate a handoff with the serving cellular MSC (251). By triggering handoffs in this manner, cellular networks need not have special information about non-cellular networks to support handoffs. Instead, dual mode MSs can determine when a handoff to a non-cellular network is preferred and request a handin (302) from the non-cellular network.
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Fors Chad M.
Gopikanth Venkat
Liss Raymond M.
Pazhyannur Rajesh S.
Jacobs Jeffrey K.
Motorola Inc.
Phan Huy
Trinh Sonny
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