Motorola Corporation

Takeshi Morishima

Dean E Thorson

Jonathan Henry Gross

Daniel J Declerck

Ravi M Adatrao

Harn-Jier Lin

Michael J Kinnavy

Ming Dai

Samer A Nabulsi

Anal R Shah

A method () and corresponding data processing system () of detecting cloned or duplicated communication units based on received signals is described. The method comprise receiving a signal () comprising a sequence of data symbols; and determining () whether the signal originated from a plurality of communication units based on a parameter, such as power or quality level of a group of the data symbols.

Detection of cloned communication units

A mobile station typically determines whether to drop a communication link and/or a base transceiver station (BTS) based on a performance of an associated forward link. In order to avoid dropping a communication link that has a weak forward link but a strong reverse link, a communication system is provided that determines whether the reverse link is still good before determining to drop the communication link. In one embodiment, the communication system determines whether reverse link is still good based on a quality metric associated with the reverse link and quality metric(s) associated with one or more other reverse links that are in a soft-handoff mode with reverse link. In another embodiment, the communication system determines whether reverse link is still good by comparing a quality metric associated with the reverse link to a threshold.

Method and apparatus for performing soft-handoff in a wireless communication system

The need for reducing the time required for call setup in a wireless communication system () is addressed herein. A base station (BS) sends a channel assignment message to a mobile station (MS) and performs traffic channel initialization procedures with the MS. After completing the traffic channel initialization procedures, the BS sends a base station acknowledgment message to the MS and proceeds to transmit signaling to the MS without waiting to receive an MS acknowledgment in response to the base station acknowledgment message. Thus, the time normally taken to receive the MS acknowledgment is saved and call setup time reduced.

Method and apparatus for reducing call setup time in a wireless communication system

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Hoffman Estates, IL, United States of America

Takeshi Morishima