Browse Prior Art Database

AUTOMATED VOICE MESSAGE RE-BROADCAST IN A TRUNKED DISPATCH RADIO SYSTEM

IP.com Disclosure Number: IPCOM000007892D
Original Publication Date: 1996-Nov-01
Included in the Prior Art Database: 2002-May-02
Document File: 1 page(s) / 69K

Publishing Venue

Motorola

Related People

Gerald Capehart: AUTHOR

Abstract

In a public safety radio system, late joining users (radio users or dispatchers) have no knowledge of dispatch trafic prior to joining. Tactical messages on late breaking events can also be missed by mutual aid radio users from surrounding jurisdictions. Repeating messages to accommodate late joiners can increase dispatcher workload in situations where stress levels are already high.

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MOTVROLA Technical Developments

AUTOMATED VOICE MESSAGE RE-BROADCAST IN A TRUNKED DISPATCH RADIO SYSTEM

by Gerald Capehart

THE PROBLEM:

  In a public safety radio system, late joining users (radio users or dispatchers) have no knowledge of dispatch trafic prior to joining. Tactical messages on late breaking events can also be missed by mutual aid radio users from surrounding jurisdictions. Repeating messages to accommodate late joiners can increase dispatcher workload in situations where stress levels are already high.

THE SOLUTION:

  The invention consists of a voice storage sub- system that allows radio users to independently (with- out dispatcher intervention) replay as a private call, the previous "N" minutes of dispatch traffic in time compressed form. The invention captures and records the voice traffic of specified talk-groups through con- sole audio logging ports. The recording mechanism runs continuously, but records only the last "IQ" min- utes of traffic in a "sliding window" buffer. Voice storage is not "message" based, but based on cap- turing all voice traffic within a "sliding window" of time. Tralhc older than the time span defined by the "window" is discarded. Oldest messages are lost, newest messages are retained. Time compression is accomplished, and storage efficiency increased, by eliminating any "dead air" from the recording.

  Late joining radio users initiate re-broadcast of the time compressed message(s) at their discretion via transmission...