Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2005-10-17
2009-11-03
Zewdu, Meless N (Department: 2617)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S509000, C455S522000, C455S550100, C455S556200, C455S561000
Reexamination Certificate
active
07613462
ABSTRACT:
A mobile station accesses a base station by randomly selecting a first reverse link common control channel from a set of random access channels. The mobile station transmits a request portion of an access probe over the first reverse link common control channel. The request portion is subject to collision with other signals. The request portion comprises a hash identification which is derived from a uniquely identifying number using a hash function. The hash identification quasi-uniquely identifies the mobile station. The mobile station receives a channel assignment message from the base station designating the hash identification and a reserved access channel. The reserved access channel provides communication with a low probability of contention. The mobile station transmits a message portion of the access probe over the reserved access channel.
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Vanghi Vieri
Walton Rod J.
Willenegger Serge
Franks Ross L.
Milikovsky Dmitry R.
QUALCOMM Incorporated
Rouse Thomas R.
Zewdu Meless N
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