05960362 is referenced by 135 patents and cites 11 patents.

A method and apparatus to provide access to a dispatch system is disclosed. A communications manager (40) grants an exclusive system talker privilege to one remote unit (10) in the system at a time. After a remote unit (10) requests and is designated as the exclusive system talker, no other remote unit (20, 22) may transmit for a first pre-determined amount of time. After the first pre-determined time has elapsed, any other remote unit (20, 22) may request the exclusive system talker privilege and become the exclusive system talker. The exclusive system talker privilege is revoked by the communications manager (40) to any remote unit who retains the exclusive system talker privilege for more than a second pre-determined amount of time. The exclusive system talker privilege is also revoked upon the release of a push-to-talk button on a remote unit (10). Furthermore, a base station (44) in communication with a remote unit (10) designated as the exclusive system talker will generate a surrogate relinquishment request to the communications manager (40) if the exclusive system talker travels outside the coverage area of the system, loses power, or is destroyed.

Title
Method and apparatus for access regulation and system protection of a dispatch system
Application Number
8/671132
Publication Number
5960362
Application Date
June 24, 1996
Publication Date
September 28, 1999
Inventor
Eric J Lekven
Carlsbad
CA, US
Yu Dong Yao
San Diego
CA, US
Matthew S Grob
La Jolla
CA, US
Agent
Thomas M Thibault
Russell B Miller
Assignee
Qualcomm Incorporated
CA, US
IPC
H04B 1/00
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