| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method and apparatus for monitoring link activity to prevent system deadlock in a dispatch system. <P>SOLUTION: A method and apparatus to prevent system deadlock in a dispatch system by monitoring link activity is disclosed. The dispatch system comprises of a set of remote units 10, 20, 22 which communicate with each other by broadcasting one at a time to the group. A remote unit 10 communicates with the other remote units through at least one base station 44. A communications manager 40 grants a remote unit 10 to be the exclusive system talker upon request through the base station servicing the requesting remote unit 44. The base station 44 monitors a series of data from the remote unit designated as the system talker 10 to detect voice activity. The base station 44 sends a surrogate request to the communications manager 40 to relinquish the system talker privilege if the voice activity falls below a predetermined threshold. <P>COPYRIGHT: (C)2008,JPO&INPIT |
