Motorola Corporation

Michael J Bonvallet

Gary W Grube

Michael D Sasuta

Leslie G Gustafson

Edward T Leisten

Requesting (transmitting) subscriber units may immediately begin transmitting an information signal over an assigned communication channel. Receiving subscriber units immediately unmute their speakers and monitor the assigned communication channel and attempt to detect a code, which indicates that they are monitoring the correct communication channel. At the central station (repeater), the information signal may be immediately repeated, unless an interference signal is present. In this way, the information signal may be rapidly disseminated (repeated) to improve subscriber access time, while providing assurance that the receiving subscribers will not receive a noise signal or the interference signal.

Fast channel access protocol for a two-way communication system

Co-channel user (129) interference on trunked radio communication systems cannot be compensated for in the same way as conventional radio systems because the communication unit does not know what frequency it will be assigned to until it begins transmitting. Placing an additional receiver (119) in the coverage area (125) of the co-channel user (129) and sending information of recent co-channel usage to the controller (101) allows the controller (101) to decide which channel has the least likelihood of co-channel interference so that it may be assigned.

Growing community of inventors

Algonquin, IL, United States of America

Michael J Bonvallet