Browse Prior Art Database

METHOD FOR INDICATING GROUP CALL PARTICIPATION

IP.com Disclosure Number: IPCOM000007287D
Original Publication Date: 1994-Oct-01
Included in the Prior Art Database: 2002-Mar-12
Document File: 1 page(s) / 70K

Publishing Venue

Motorola

Related People

Dan McDonald: AUTHOR [+3]

Abstract

A major feature of a communication system is the ability to provide communication amongst com- munication units that are in a common group. This is referred to as a group call. Group calls occur in a broadcast fashion such that when a group call trans- mission occurs, there is no automatic mechanism for the sender to determine if all members in the group received the transmission. When a group call occurs, some members of a group may not be able to receive a message as well as others, to the extreme of not at all. This may be due, for example, to a receiving member being in a poor coverage area. In the case of group call communication, neither the sender nor the communication system infrastructure has knowledge as to who has and who has not received a message adequately.

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MOTOROLA Technical Developments Volume 23 October 1994

METHOD FOR INDICATING GROUP CALL PARflClPATlON

by Dan McDonald, Mike Sasuta and Mark Shaughnwsy

indication would generally indicate the quality level of the received group call. The infrastructure can then use that indication to affect the current call process, (e.g., power level, call routing, call repeti- tion, error correction coding enhancement). The call receive indication can also be used to create an his- torical database for future transmissions to that subscriber, including possible re-transmission of this same message.

  If the fixed infrastructure keeps track of all units that are members of a particular group, it can also determine, based on call receive indications from participating group members in a group call, those members that did not participate in a particular call. The fixed infrastructure scan then use this informa- tion to selectively retransmit a message, in whole or in part, to any group members who have not ade- quately received the message.

INTRODUCTION

  A major feature of a communication system is the ability to provide communication amongst com- munication units that are in a common group. This is referred to as a group call. Group calls occur in a broadcast fashion such that when a group call trans- mission occurs, there is no automatic mechanism for the sender to determine if all members in the group received the transmission. When a group call occurs, some members of a group...