Browse Prior Art Database

CALLING GROUPS FOR TRUNKED RADIO SYSTEMS

IP.com Disclosure Number: IPCOM000007088D
Original Publication Date: 1994-Feb-01
Included in the Prior Art Database: 2002-Feb-25
Document File: 1 page(s) / 68K

Publishing Venue

Motorola

Related People

Paul Bocci: AUTHOR

Abstract

A major advantage of trunked radio systems is that they can be used to provide a shared commu- nications system for more than one group of radio users. This allows system costs to be spread over the different user groups. Frequently, the groups shar- ing the system will have no reason to interact with each other as their functions are very different. In fact, it may be desirable to limit or prevent the inter- action between certain groups either for reasons of security or due to equipment incompatibilities.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 50% of the total text.

Page 1 of 1

MOTOROLA Technical Developments Volume 21 February 1994

CALLING GROUPS FOR TRUNKED RADIO SYSTEMS

by Paul Bocci

  A major advantage of trunked radio systems is that they can be used to provide a shared commu- nications system for more than one group of radio users. This allows system costs to be spread over the different user groups. Frequently, the groups shar- ing the system will have no reason to interact with each other as their functions are very different. In fact, it may be desirable to limit or prevent the inter- action between certain groups either for reasons of security or due to equipment incompatibilities.

  Currently fielded trunked radio systems provide two basic types of communications capabilities between subscriber radios: Group Calls and Indi- vidual Calls. Group calls are point to multi-point calls which allow conversation among a prearranged group of users. The group of users is referred to as a Talk Group. Individual calls are point to point calls involving only two individuals. The two individuals may be any two subscribers active on the radio system.

  Group Calls, within their Talk Groups, auto- matically provide a partition mechanism to insure separation of users. Only users who are permitted to interact with each other are put into a particular Talk Group. Individual Calls have no similar limi- tation applied to them to permit management of indi- vidual interactions.

A technique to manage these individual inter- actions is the Calling Group. A...