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Browse Prior Art Database

DYNAMIC CROSS SYSTEM RF PATCH

IP.com Disclosure Number: IPCOM000006778D
Original Publication Date: 1993-Mar-01
Included in the Prior Art Database: 2002-Jan-31
Document File: 3 page(s) / 145K

Publishing Venue

Motorola

Related People

Michael L. Wertjes: AUTHOR [+3]

Abstract

In today's communication systems there are only two methods for a user that normally communicates on one trunked system to communicate with a user from another system. One method is to obtain a unique ID on the adjacent system(s) and pay for this service. The second method is for the two systems to be linked together via a Wireline Series II console. The user would then have to ask the dispatcher to establish an audio patch with the target user on the other system.

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MO7VROLA INC. Technical Developments Volume 18 March 1993

DYNAMIC CROSS SYSTEM RF PATCH

by Michael L. Wertjes, Patricia Ekstrom and John I?. Garbarino

INTRODUCTION

  In today's communication systems there are only two methods for a user that normally communicates on one trunked system to communicate with a user from another system. One method is to obtain a unique ID on the adjacent system(s) and pay for this service. The second method is for the two systems to be linked together via a Wireline Series II console. The user would then have to ask the dispatcher to establish an audio patch with the target user on the other system.

  This invention provides a methodology by which users located in independent systems can communicate with each other. Special setup procedures will be unneeded prior to the forementioned communication and, by dynamically allocating resources that the cus- tomer already has available at the site, communication will be accomplished in a cost effective manner. This will be useful for those customers that want an inexpen- sive method of cross system patch but the flexibility to assign a patch only when requested.

DESCRIPTION

  The methodology incorporated into this invention is intended to be used in conjunction with a Smart Repeater site. Configuration of the site will be set up normally with the exception of a dedicated, frequency agile channel which can be dynamically reprogrammed to any receive or transmit frequency within the site's operational band. For example ifthe site is operating as an 800 MHz system, the frequency agile channel will have the capability to receive or transmit on any valid 800 MHz frequency used in a ttunked communication system. The invention consists of an algorithm to dynam- ically build an adjacent system table, an algorithm to setup and maintain the RF patch to facilitate control information transfers and the technology of routing the communication channel audio horn the channel resource on one system to the channel resource on the second system.

102

  An algorithm will be i,used to build and maintain a table that consists of data needed to request an RF patch with an adjacent system. The Adjacent System Table is built by using an RF Polling method. The RF polling algorithm will dynamically reprogram the dedicated he- quency agile channel to valid trunked frequencies within a particular band (i.e. 800 MHz) and scan for the pres- ence of Trunked Control: Channel Data from an adja- cent system. The scanning of frequencies takes place whenever the frequency agile channel is not active in a cross system patch or upon expiration of a predetermined time interval.

  Once the dedicated channel has been reprogrammed to a receive trunked frequency, it will monitor this frequency until a predetermined time out period expires or until the presence of 'valid control channel data is...