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Browse Prior Art Database

SECURE STEERING FOR MULTI-ZONE SYSTEMS

IP.com Disclosure Number: IPCOM000007753D
Original Publication Date: 1996-Aug-01
Included in the Prior Art Database: 2002-Apr-19
Document File: 2 page(s) / 79K

Publishing Venue

Motorola

Related People

Mark Zollner: AUTHOR [+3]

Abstract

The current method of secure steering in the if the clear resources are either busy or unavailable. SmartZone trunked system allows a clear analog/ This method, however, only works in a single zone digital interconnect call to use encrypted resources environment. See Figure 1 for detail.

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Page 1 of 2

Technical Developments

SECURE STEERING FOR MULTI-ZONE SYSTEMS

by Mark Zollner, Richard Nicholl and David Tran

1 SECURE STEERING IN SMARTZONE

  The current method of secure steering in the if the clear resources are either busy or unavailable. SmartZone trunked system allows a clear analog/ This method, however, only works in a single zone digital interconnect call to use encrypted resources environment. See Figure 1 for detail.

A method is needed to extend this feature for multi-zone systems such as OmniLink.

2 A SECURE STEERING METHOD

FOR MULTI-ZONE SYSTEMS

.

  The new method of secure steering in a multi- zone system involves synchronizing the resource types across the zones. This starts out as one zone choosing the resources, informing the other zone the resources that it chose, and then either granting the call or reacquiring the resources again. This method continues until the best possible set of resources is negotiated across zones. The call would then be granted. If the zones are not able to match resources the call either gets rejected or busied.

-. ^.. ,. .

'the following ngure snows a typtcal secure steering scenario in OmniLink for a land to mobile

interconnect call. In OmniLink, the PZ is the par-

ticipating zone and the CZ is the controlling zone. The CZ is the zone with a PSTN interface device and the PZ is the zone where the target of the land to mobile call resides. In this scenario, the PZ is the zone that first chooses the resources after the radio...