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MULTIPLE QUEUED CALL BACKS FOR A SINGLE CALL OPERATION IN A NETWORKED TRUNKING SYSTEM

IP.com Disclosure Number: IPCOM000006549D
Original Publication Date: 1992-Aug-01
Included in the Prior Art Database: 2002-Jan-14
Document File: 1 page(s) / 89K

Publishing Venue

Motorola

Related People

Daniel J. McDonald: AUTHOR [+2]

Abstract

In a networked trunking system, the subscriber unit user population for a logical grouping of users of the system is often distributed across multiple sites of the network. Group call operations need to span these pop- ulated sites of the network to include all members of the addressed grouping. When a group call request for a grouping with user population distributed across multi- ple sites is received, call resources at each of these pop- ulated sites is required to assure maximal participation in the group call. However, in an attempt to reduce ini- tial system access time for the processing of these multi- ple site spanning group calls, the call process may begin when the site of the group service request and a subset of the sites supporting group members for the requested grouping have adequate call resources for assignment. As call resources become available at the other group- ing populated sites, these sites join the call already in progress and will be treated as active members of the Cdl.

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MOTOROLA INC. Technical Developments Volume 16 August 1662

MULTIPLE QUEUED CALL BACKS FOR A SINGLE CALL OPERATION IN A NElWORKED TRUNKING SYSTEM

by Daniel J. McDonald and Michael D. Sasuta

  In a networked trunking system, the subscriber unit user population for a logical grouping of users of the system is often distributed across multiple sites of the network. Group call operations need to span these pop- ulated sites of the network to include all members of the addressed grouping. When a group call request for a grouping with user population distributed across multi- ple sites is received, call resources at each of these pop- ulated sites is required to assure maximal participation in the group call. However, in an attempt to reduce ini- tial system access time for the processing of these multi- ple site spanning group calls, the call process may begin when the site of the group service request and a subset of the sites supporting group members for the requested grouping have adequate call resources for assignment. As call resources become available at the other group- ing populated sites, these sites join the call already in progress and will be treated as active members of the

Cdl.

  If a member of this grouping resident at one of these delayed sites were to request a group calI operation for this same grouping the requestor will receive a queued indication. When call resources become available at this site for this call, the queued indication will be transformed to a call assignment for the grouping. Ifthere is another user at an active site currently transmitting for this call, the group call assignment addressing the grouping pop- ulation at this site indicates the identity of the current user afforded transmit permission for the call, with all grouping members at this site responding as receiving units, including the requesting unit at this site. This par- allels the operations for a single site trunking system when there is contention for transmit permission for a call, with one of the requesting users being granted the transmit permission while all other contenders for trans- mit permission revert to receive operation.

  A condition can arise in which a user of this group- ing currently at one of these sites without available call resources, makes a call request...