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Browse Prior Art Database

RADIO SYSTEM DISPATCHER GENERAL RESPONSIBILITY SCHEME

IP.com Disclosure Number: IPCOM000006829D
Original Publication Date: 1993-Jun-01
Included in the Prior Art Database: 2002-Feb-06
Document File: 6 page(s) / 364K

Publishing Venue

Motorola

Related People

David Bar-On: AUTHOR [+2]

Abstract

A large Radio System, such as Smartnet or Smartzone, provides service for hundreds and thousands of Radio Users operating over a wide area. The service is organized by means of a group of Dispatchers, receiv- ing the signals from the operating Radios and-to some extent-managing the process of communication between the Radios. Usually more than one Dispatcher takes care of all the Radio Users. Each one is authorized to deal with some group of them. The Dispatcher who is not authorized to deal with a specific Radio-has no corresponding Responsibilities-should not be capable of intluencing its work and be intluenced by its existence.

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INC. Technical Developments Volume 19 June 1993

RADIO SYSTEM DISPATCHER GENERAL RESPONSIBILITY SCHEME

by David Bar-On and Michael Kogan

PROBLEMS SOLVED BY THE INVENTION

  A large Radio System, such as Smartnet or Smartzone, provides service for hundreds and thousands of Radio Users operating over a wide area. The service is organized by means of a group of Dispatchers, receiv- ing the signals from the operating Radios and-to some extent-managing the process of communication between the Radios. Usually more than one Dispatcher takes care of all the Radio Users. Each one is authorized to deal with some group of them. The Dispatcher who is not authorized to deal with a specific Radio-has no corresponding Responsibilities-should not be capable of intluencing its work and be intluenced by its existence.

The current approach (Smartnet controlled by SIMS
II) provided a way to define the set of Radios the Dis- patcher can interact with, i.e. to send commands to and to receive the signals from. For each Radio, the exact specification of rights and Responsibilities of the Dis- patcher are provided, i.e. for each type of command and type of Radio signal a corresponding Responsibility flag is defined showing whether the Dispatcher is author- ized to issue it for the specitic Radio and for each type of signal arriving from Radio-whether the Dispatcher has to receive it from that Radio.

  The problems we face in the current approach when dealing with the increased amount of Radios are:
-the Responsibilities flags must be specified explicitly for each Talkgroup-and no means are provided to give the same description for diRerent Talkgroups and to change simultaneously the properties of a set of groups; -the Responsibilities are specified only for Talkgroups.

So, all the restrictions on issuing Radio commands are based on the Responsibilities flags defined for the Talkgroup contaning the Radio. No Responsibilities flags are provided for the higher level groups and the corn- mands dealing with groups (instead of Radios) are not used at all;
-all Talkgroups and Multigroups (Announcement groups) are seen by the Dispatcher even when he is actually dealing with some subset of them and may have no

means to change the set of Talkgroups under his responsibility.

  In the suggested solution the Radios are organized in hierarchically ordered groups of some levels. The Responsibilities are applied to the groups as well as to the Radios and the top-down inheritance of Responsi- bilities is provided for the groups and the Radios. The inheritance means, that for each Object-Radio or Croup- the set of Responsibilities flags may be dehned explicitly or received from the higher level containing groups. The inheritance of Responsibilities permits making the descriptions shorter and provides the way to make mul- tiple changes ofthe Responsibilities.

  This concept is referred to in the Engineering Func- tional Requirements for Smartzone Dispatcher docu- ment, vers...