Motorola Corporation

Motorola Solutions, Inc.

John G Lambrou

Jonathan Henry Gross

Thomas Peter Emmons, Jr

Shawn Wesley Hogberg

James William Startup

Robert Anthony Peters

Nathanael P Kuehner

Craig L Fullerton

James E Eastwood

Timothy Woodward

Todd A Leigh

John Richard Erlick

Jim E Helm

Gerald R Drobka

Cynthia C Matthews

Michael Dane Ince

Susan L Harris

Allen H &lsquo;Skip&rsquo; Nelson

David L Krueger

Timothy G Woodward

A method for selecting a channel for group communications in a conventional multi-channel communication system comprises receiving, for a plurality of channels in the multi-channel communication system, a talkgroup assignment list for the channels that identifies a set of talkgroups assigned to use the corresponding channels. A subscriber unit receives talkgroup assignment lists for multiple different channels, determines a desired talkgroup, and selects a channel assigned to the desired talkgroup using the received talkgroup assignment. The talkgroup assignment list is developed for at least one channel in the multi-channel communication system and identifies a set of talkgroups assigned to use the corresponding channel. The list is transmitted for the channel to a subscriber unit and is used by the subscriber unit to register with the system and affiliate with a talkgroup supported by the channel in the conventional multi-channel communication system.

Method for selecting a channel in a multi-channel communication system

A method of increasing satellite communication quality by using a MEO satellite constellation ( ) and a LEO satellite constellation ( ) in combination with a decision algorithm which selects the appropriate constellation to route a communication signal through. The decision algorithm can be embodied in three ways: gateway based ( ), individual subscriber unit based ( ) and satellite based ( ). The MEO constellation ( ) and LEO ( ) constellation may be cross-linked, allowing for switching of service between satellites, as needed, during a communication session.

System for providing optimal satellite communication via a MEO/LEO satellite constellation

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Scottsdale, AZ, United States of America

John G Lambrou