Motorola Corporation

James Peter Aldrich

Barry J Menich

John S Csapo

Samuel D Fernandez

Ben Douglas Gay

Handoff from a Code-Division, Multiple Access (CDMA) protocol to an Advanced Mobile Phone Service (AMPS) protocol occurs by comparing a remote unit's ( ) phase shift measurement to a threshold ( ) and determining a reference CDMA base station ( ) from an active set of CDMA base stations ( ). Next, corrected phase shifts are calculated for each CDMA base station in the active set ( ) and the remote unit ( ) is handed off to an AMPS base station ( ) underlying the CDMA coverage area ( ) having the smallest corrected phase shift ( ).

Method and apparatus for performing handoff in a spread-spectrum communication system

There is provided a mechanism for providing data services over a wireless cellular network. It comprises: establishing communications over the cellular network; upon a subscriber designating that it has a data communication, redirecting data traffic to the designated frequency (a shared data channel) on an interconnected wireless data network exhibiting (cellular) reuse of data channel frequencies; and returning the subscriber's transceiver to voice mode upon cessation of data communications. Data service will appear to have been provided by the cellular network.

Growing community of inventors

Glendale Heights, IL, United States of America

James Peter Aldrich