Browse Prior Art Database

User-Based Individual Call to Multiple Units

IP.com Disclosure Number: IPCOM000004661D
Original Publication Date: 2001-Mar-20
Included in the Prior Art Database: 2001-Mar-20
Document File: 2 page(s) / 25K

Publishing Venue

Motorola

Related People

Arthur L. Fumarolo: AUTHOR [+5]

Abstract

In a radio system supporting an Individual Call service, a method is needed to determine the correct target terminal to which deliver an individual call if the desired recipient of the call is using multiple terminals simultaneously.

This text was extracted from a Microsoft Word 97 document.
This is the abbreviated version, containing approximately 67% of the total text.

User-Based Individual Call to Multiple Units

by Arthur L. Fumarolo, Keith C.J. Haugen, Daniel J. McDonald, Brian R. Poe, John W. Maher

ABSTRACT:

In a radio system supporting an Individual Call service, a method is needed to determine the correct target terminal to which deliver an individual call if the desired recipient of the call is using multiple terminals simultaneously.

BACKGROUND:

Modern radio systems offer an Individual Call service, which allows a radio in the system to initiate a call directed to another individual radio in the system. The ensuing call allows for the two parties to speak to each other without others in the radios' current talkgroup being able to listen or talk as part of the call. An Individual Call from one radio unit (or console position) to another is targeted to the numeric ID or alphanumeric alias associated with the target unit (terminal device).

In some systems, the terminal device and the user of the terminal device are not statically linked. In other words, a radio user may be given a different radio to use each day, or a console operator may be seated at a different radio console position each day. This makes the task of placing an Individual Call to a particular user very difficult, because the terminal ID being used by a particular user may change on a day-to-day basis.

To fix this problem, methods have been devised which allow a call initiator to identify the target user for the call (rather than the target terminal). These methods require a mapping to be created in the system between each user, and the terminal device they are using. This mapping can be created by having an administrator modify a database, or having the user log in to a terminal using common techniques (including use of a keyboard/keypad, or insertion of a smart card). Once the mapping of user to terminal device exists, it is possible to route a call to a user's current terminal device.

PROBLEM DESCRIPTION:

A problem still remains if a user is allowed to associate him/herself with more than one terminal device. In this case, when a caller targets that user with an Individual Call, it is not obvious which terminal the call should be sent to. One solution is for the system to disallow a user from being associated with more than one terminal device at a time. However, this solution is too restrictive and would not handle common scenarios for system users. These common scenarios include:

1. A police officer typically has a hand-held radio as well as a radio mounted into the squad car, and wants to be associated with both terminals.

2. A console operator may be logged in to more than one dispatch console at a given time.

The problem to be solved is finding a method allowing Individual services to be targeted to a user that may be actively registered to multiple terminal devices (including subscriber units or dispatch consoles).

SOLUTION:

A method of initiating an individual call to a user (rather than terminal device) which handles the scenario of users bein...