Motorola Corporation

Hugh Wang

Gregory Redmond Black

Yilin Zhao

Wayne Huang

Anhtuan Trandai

James G Haerle

Gang Sun

Satellite positioning system enabled mobile receivers ( ) and cellular communication network base stations ( ) synchronized with satellite positioning system clocks and method therefore. In a network-assisted embodiment, a variable propagation delay for transmission of an assistance message ( ) from the base station to the mobile receiver is determined for correcting the handset clock ( ). In others embodiments, local clock drift of mobile receivers ( ) and/or base stations ( ) are determined by a ratio of local and satellite time differences, based on sequential time snapshots, for use in correcting the local clocks.

Time synchronization of a satellite positioning system enabled mobile receiver and base station

A transmission power control method subdivides one or more transmission power steps as defined in a system specification into multiple sub-steps. A base station (290) instructs a mobile station (280) to use a defined power step, and the mobile station (280) initially selects a maximum power sub-step within the requested power step during an initial RACH (225) transmission. During the duration of the call, the mobile station (280) dynamically adjusts the power sub-step based on measured signal reception quality and channel conditions. The result is an improvement in call completion rates with only a minor reduction in battery life.

Transmission power control method

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San Diego, CA, United States of America

Hugh Wang