H - Electricity – 04 – B
Patent
H - Electricity
04
B
325/41
H04B 7/26 (2006.01) H04L 1/24 (2006.01) H04Q 7/28 (2006.01)
Patent
CA 2023397
A voice Guard digital voter system for a mulit-site public service trunking (PST) digitally trunked RF communications system operates on the principle that it is highly likely that messages received during a system redundancy removal period are redundant messages. For a given RF channel, digital receiver is associated with each of multiple sites and receives digital messages reported to it by its associated sites. The multiple digital receivers axe connected to a digital selector via a service request line (FSL) and a serial data line (BSL). Digital receivers calculate a bit error rate code (BERC) for each message they receive. All digital receivers receiving a version of a message are synchronized by the digital selector in response to a request to transmit by one of the digital receivers. The digital receivers wait a delay time corresponding to the BERC they calculates and also responsive to a fixed slot assignment associated with each digital receiver. The digital receiver having the lowest calculated BERC begins first to transmit its message to the selector -- and all other receivers abort transmitting. Bus contentions between digital receivers calculating the same BERC by introducing the additional delay time corresponding to digital receiver fixed slot assignment.
Derenge Charles L.
Tucker Marcella M.
Company General Electric
Craig Wilson And Company
LandOfFree
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