Browse Prior Art Database

SUBSCRIBER SHADOW AFFILIATIONS

IP.com Disclosure Number: IPCOM000009001D
Original Publication Date: 1999-Jan-01
Included in the Prior Art Database: 2002-Jul-30
Document File: 1 page(s) / 76K

Publishing Venue

Motorola

Related People

Robert Biggs: AUTHOR [+3]

Abstract

In SmartZone OmniLink systems, subscriber units can only scan for talkgroups that are afl?liated at the same site as the scanning subscriber unit. This means that desired audio may be missed by a scanning subscriber, if another subscriber isn't afftli- ated with the talkgroup being scanned.

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MO-LA Technical Developments

SUBSCRIBER SHADOW AFFILIATIQNS

by Robert Biggs, John Gilbert and Chris Wilson

BACKGROUND

  In SmartZone OmniLink systems, subscriber units can only scan for talkgroups that are afl?liated at the same site as the scanning subscriber unit. This means that desired audio may be missed by a scanning subscriber, if another subscriber isn't afftli- ated with the talkgroup being scanned.

PROBLEM

  Radio users have asked for the ability to scan or monitor particular talkgroups even if that particular talkgroup has no affiliated members at the site where the scanning subscriber is affiliated. Public safety officers want to be able to monitor the activi- ty of other public safety officers even if those offi- cers are affiliated on different sites and on different talkgroups. This functionality is needed by public safety officers to quickly provide back-up for each other.

PRIOR ART

There are several ways that the subscriber could previously listen to non-affiliated talkgroups.

The subscriber user could manually change talk- groups to the talkgroup of interest. This is not effec-

tive since that user now loses communication with his primary talkgroup. The system manager/zone controller can force a mandatory affiliation of any talkgroup at any site. This consumes channel resources at a site since a channel is assigned even if there is no user interested in that talkgroup at that site. If this talkgroup needs to be monitored on any site of the system, a channel at every site would be used whenever this talkgroup was active. This leads to poor channel efficiency, especially if more than one talkgroup needs to be monitored throughout the system.

SOLUTION

  When a subscriber registers and affiliates at a site with scan enabled, th...