Browse Prior Art Database

A METHOD FOR ALLOWING SUBSCRIBER ROAMING IN A CONVENTIONAL VOICE / DATA SYSTEM

IP.com Disclosure Number: IPCOM000008350D
Original Publication Date: 1997-Sep-01
Included in the Prior Art Database: 2002-Jun-10
Document File: 2 page(s) / 85K

Publishing Venue

Motorola

Related People

Mark D. Chapman: AUTHOR

Abstract

Today's conventional data systems allow a sub- scriber to roam between channels at a site as well as between channels on different sites while maintain- ing all necessary connectivity. In an integrated voice / data environment the moment a subscriber roams to a different data channel it looses contact both with the voice infrastructure / console as well as with other members of its subscriber talk group. Unlike Trunking there is no control channel in a conventional system to command all voice users of a talk group to change to a common channel for each call.

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MOTOROLA Technical Developments

A METHOD FOR ALLOWING SUBSCRIBER ROAMING IN A CONVENTIONAL VOICE / DATA SYSTEM

by Mark D. Chapman

  Today's conventional data systems allow a sub- scriber to roam between channels at a site as well as between channels on different sites while maintain- ing all necessary connectivity. In an integrated voice / data environment the moment a subscriber roams to a different data channel it looses contact both with the voice infrastructure / console as well as with other members of its subscriber talk group. Unlike Trunking there is no control channel in a conventional system to command all voice users of a talk group to change to a common channel for each call.

  This method for roaming consists first of using the information already contained within the data network controller indicating the correct connectivity

path to each subscriber in the system to enable an audio routing function to correctly route audio calls in real time.

  Second to enable an audio router to make multi- ple simultaneous copies of a voice call so as to reach a group of users spread across multiple sites and frequencies.

  Third to provide control repeater stations or receivers linked to the audio switch element to correctly route calls to subscribers not currently on the initiating standalone repeater site.

A typical system configuration is shown below.

L-l

Ch2

 Digital Interface Unit

P

I

Audio Router I Copier

I

I

I I ----------_--___

_) Audio - - + Data

0 Motomla, Inc. ,997

181 September I997

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