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SUBSCRIBER RACE CONDITION DETERMINATION IN APCO SYSTEMS

IP.com Disclosure Number: IPCOM000008718D
Original Publication Date: 1998-Jun-01
Included in the Prior Art Database: 2002-Jul-05

Publishing Venue

Motorola

Related People

Authors:
Janahan Vivekanandan Daniel J. McDonald Gregory A. Godsell

Abstract

In a wide area multiple site trunked communi- cation system it is possible for multiple subscriber units to request to communicate on the same group at approximately the same time. This is called a subscriber unit race condition. This is possible in a multiple site system since each site could simulta- neously receive the group call request. Since group calls are a one way transmission, only one of the requesting subscriber units can source audio while all others should receive audio. A mechanism must be created which can coordinate these multiple requests such that only one subscriber unit transmits and the remaining requesting subscriber units receive the transmitting unit's audio.