Browse Prior Art Database

DYNAMIC TALKGROUP TO CONTROLLING ZONE MAPPING MECHANISM IN A SYSTEM WITH A DISTRIBUTED GROUP HLR

IP.com Disclosure Number: IPCOM000008315D
Original Publication Date: 1997-Sep-01
Included in the Prior Art Database: 2002-Jun-05
Document File: 3 page(s) / 129K

Publishing Venue

Motorola

Related People

Randy Kremske: AUTHOR

Abstract

In a wide area multizone trunked radio system with a distributed Group HLR (Home Location Register) there exists the potential for inefficient usage of the interzone audio channels. With a distributed Group HLR architecture the talkgroup to controlling zone mapping is currently configured statically via the system manager application. Once the talkgroup to controlling zone mappings are entered into the system manager they are distributed to the Group HLRs within each zone for use in multizone call processing. A talkgroup call is controlled by the zone controller of the zone which is designated as the controlling zone by the system manager application.

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DYNAMIC TALKGROUP TO CONTROLLING ZONE MAPPING MECHANISM IN A SYSTEM WITH A DISTRIBUTED GROUP HLR

by Randy Kremske

PROBLEM DESCRIPTION

  In a wide area multizone trunked radio system with a distributed Group HLR (Home Location Register) there exists the potential for inefficient usage of the interzone audio channels. With a distributed Group HLR architecture the talkgroup to controlling zone mapping is currently configured statically via the system manager application. Once the talkgroup to controlling zone mappings are entered into the system manager they are distributed to the Group HLRs within each zone for use in multizone call processing. A talkgroup call is controlled by the zone controller of the zone which is designated as the controlling zone by the system manager application.

  All audio signals in an interzone talkgroup call are routed back through the controlling zone's audio switch as a central routing point for a multizone

talkgroup call. The audio signals are routed back to the controlling zone even if the controlling zone does not have any subscribers currently affiliated to the talkgroup. If all subscriber members of a talk- group roam out of their talkgroup's designated controlling zone, and a talkgroup call occurs, the audio signals must be routed back to the controlling zone's audio switch.

  The routing of audio signals back to a controlling zone without a need for the audio signals to be sent to a subscriber in that zone is an inefftcient use of interzone audio channels which could result in other interzone calls not being granted due to lack of interzone audio channel resources.

  As shown in Figure I, after all subscribers of Talkgroup I in Zone I roam to Zone 3, when a member of Talkgroup 1 places a group call, audio is still routed to Zone I.

Fig. 1 Static Talkgroup to Controlling Zone Mapping

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MOTOROLA Technical Developments

SOLUTION

  This invention consists of a dynamic mapping mechanism for talkgroup to controlling zone mappings in a distributed Group HLR system. A dynamic mapping software application monitors the mobility of the subscribers in the system and dynamically updates the system manag...