US 7,565,144 B2
Method, system and mobile station for handing off communications from a cellular radio access network to an unlicensed mobile access network
Yousuf Saifullah, Flower Mound, Tex. (US); and Haihong Zheng, Coppell, Tex. (US)
Assigned to Nokia Corporation, Espoo (Finland)
Filed on Nov. 01, 2004, as Appl. No. 10/979,009.
Prior Publication US 2006/0094431 A1, May 04, 2006
Int. Cl. H04W 40/00 (2009.01); H04W 4/00 (2009.01)
U.S. Cl. 455—436  [455/448; 370/331] 8 Claims
OG exemplary drawing
 
1. A method comprising: registering a mobile station with an unlicensed mobile access network (UMAN); receiving an identification of an unlicensed network controller of the UMAN at the mobile station; the identification of the unlicensed network controller comprises identifying a band class of a cellular system; identifying a frequency outside of a frequency range corresponding to the band class that is assigned to the unlicensed network controller; and transmitting a message from the mobile station to a cellular radio access network directing a handoff of communications from the cellular radio access network to the UMAN such that the mobile station is thereafter in communication with the unlicensed network controller of the UMAN.