Browse Prior Art Database

DUPLICATE RADIO ID ADDRESSING USING RANDOM NUMBER ADDRESS COMPONENT

IP.com Disclosure Number: IPCOM000007358D
Original Publication Date: 1995-Mar-01
Included in the Prior Art Database: 2002-Mar-19
Document File: 1 page(s) / 50K

Publishing Venue

Motorola

Related People

Andrew Fuehl: AUTHOR [+2]

Abstract

Trunked radio system owners desire the ability to identify and address radios which have duplicate addresses, radio IDS or serial numbers. This infor- mation is desired to detect misprogrammed, cloned or undesired radios.

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MOIOROLA Technical Developments Volume 24 March 1995

DUPLICATE RADIO ID ADDRESSING USING RANDOM NUMBER ADDRESS COMPONENT

by Andrew Fuehl and Robert Plaza

is no current automated method to address a single radio when more than one radio with the same address and state is monitoring the control channel.

BACKGROUND

SOLUTION

  Trunked radio system owners desire the ability to identify and address radios which have duplicate addresses, radio IDS or serial numbers. This infor- mation is desired to detect misprogrammed, cloned or undesired radios.

  Currently messages to and From individual radios utilize the radio's ID to address and identity the radio. In the situation where multiple radios are using the same radio ID, address or serial number and the radios are in the same state, it is impossible to dis- tinguish responses from indiviual radios since each radio responds with the same message. System com- ponents can detect multiple response transmissions, but it is impossible to distinguish whether this is caused by multiple sources or a single source which is repeating the transmission (retrying). Further, there

  This invention utilizes a random number com- ponent generated by the radio in response to a polling request message. Since each radio in a duplicate radio situation, will likely respond with a different ran- dom number component, the radio responses will be unique and detectable. The number of unique responses indicates the number of radios using the same radio...