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Browse Prior Art Database

MULTI SITE SUBSCRIBER STEERING

IP.com Disclosure Number: IPCOM000008252D
Original Publication Date: 1997-Sep-01
Included in the Prior Art Database: 2002-May-30
Document File: 2 page(s) / 94K

Publishing Venue

Motorola

Related People

Philip T. Fleege: AUTHOR [+2]

Abstract

In multi zone/site trunking systems, each zone/site involved in a call needs to acquire fixed network equipment (FNE) resources. If resources cannot be acquired the call will be queued or dropped. Given this, it is desirable to minimize the number of zones/sites involved in each call. If this can be optimized, system efficiency and performance will be positively impacted.

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m MOTOROLA Technical Developments

MULTI SITE SUBSCRIBER STEERING

by Philip T. Fleege and Steven E. Swol

BACKGROUND

  In multi zone/site trunking systems, each zone/site involved in a call needs to acquire fixed network equipment (FNE) resources. If resources cannot be acquired the call will be queued or dropped. Given this, it is desirable to minimize the number of zones/sites involved in each call. If this can be optimized, system efficiency and performance will be positively impacted.

PROBLEM

  The FNE periodically informs the subscriber about adjacent zone/sites. The subscriber unit then maintains a ranking of these adjacent zone/sites. The ranking is primarily based on signal strength, resource availability, and a pre-determined list of preferred zone/sites. The subscriber unit creates a ranked preferred zone/site list to determine the "most-preferred" zone/site for operation. However, often subscriber radios are physically located such that they can successfully afftliate to two or more preferred zone/sites of equal ranking.

  Since a multi zone/site call must be initiated when one or more members of a talkgroup are each affiliated at different (two or more unique)

zone/sites, it would be advantageous to "steer" as many subscribers units into the same common zone/site (or into the smallest number of common zone/sites) as possible. Currently, there is no way to accomplish this zone/site steering.

SOLUTION

  The FNE is always aware of the current zone/site of all subscribers. The FNE can request, via an outbound signaling word/packet (OSW/OSP), that a member, of an in-active talk- group, begin to sample the various sites and when complete, return a list of usable sites (zone/site). Upon receiving the list of usable zone/sites, via an inbound signaling word/packet (ISW/ISP), the infrastructure can calculate the optimal site from the list...