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DIRECT OR REPEATER REPLY BASED ON CHANNEL STATUS SYMBOLS

IP.com Disclosure Number: IPCOM000008055D
Original Publication Date: 1997-Mar-01
Included in the Prior Art Database: 2002-May-15
Document File: 1 page(s) / 72K

Publishing Venue

Motorola

Related People

Gary Hunsberger: AUTHOR

Abstract

In conventional radio systems, subscriber users can select whether to operate on frequencies which will be repeated by infrastructure or which talk directly to other subscribers (talkaround/direct mode). Users may choose to enter talkaround/direct mode because they are out of the coverage area of the repeater, the repeater is not functioning proper- ly, or they may not want to be repeated for whatever reason.

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MOTOROLA Technical Developments

DIRECT OR REPEATER REPLY BASED ON CHANNEL STATUS SYMBOLS

by Gary Hunsberger

BACKGROUND

  In conventional radio systems, subscriber users can select whether to operate on frequencies which will be repeated by infrastructure or which talk directly to other subscribers (talkaround/direct mode). Users may choose to enter talkaround/direct mode because they are out of the coverage area of the repeater, the repeater is not functioning proper- ly, or they may not want to be repeated for whatever reason.

PROBLEMS

  Problems arise when users are switching back and forth between repeated and direct transmis- sions. When one user's radio (radio 1) is transmit- ting in talkarounddirect mode to a user radio (radio
2) in repeater mode, radio 2 will receive that signal (because all reception occurs on the same frequen- cy). But, in order to reply in talkaround'direct mode the user must perform a manual operation (press a button or flip a switch). Also, radio features trans- mitted from radio 1 which generate an automatic acknowledge by radio 2 will use the selected trans- mit mode regardless of what mode radio 1 used. Therefore, there are two main problems that exist in the case above. One is that radio features requiring an automatic acknowledge will not work correctly if radio 1 is out of range of the repeater. The second is that without manual intervention by the user of radio 2, the repeater will be used when the user of radio 1 intended not to use it.

SOLUTION

  These problems are resolved by replying to transmissions us...