Patent ID: 7136639

Claim:
A wireless dual use user equipment (UE) capable of operating in a cordless and cellular environment, the dual use user equipment comprising: a modulation and demodulation device for modulating/demodulating data using a plurality of modulation/demodulation schemes, the plurality of modulation/demodulation schemes comprise a cordless scheme for communicating with a sub base and a cellular scheme for communicating with a base station; a modulation and demodulation controller for switching the modulation/demodulation scheme of the modulation/demodulation device between the cordless scheme and the cellular scheme such that a transition between said cordless and cellular schemes is transparent to a user sending or receiving a communication signal from said dual use UE; the modulation and demodulation controller initiating operation in the cellular environment by sending a handoff signal to a sub base responsive to a determination that said UE is leaving a cordless environment and switching to the cellular scheme; whereby the sub base in response to the sent handoff signal ceases communications with a cellular base station and whereby in response to the ceased communications between the sub base and the cellular base station, the modulation and demodulation controller of the UE switches the modulation/demodulation scheme of the UE from the cordless scheme to the cellular scheme, thereby initiating communication of the UE directly with the cellular base station.