Browse Prior Art Database

LOCATION ALARM

IP.com Disclosure Number: IPCOM000006159D
Original Publication Date: 1991-Apr-01
Included in the Prior Art Database: 2001-Dec-10
Document File: 2 page(s) / 90K

Publishing Venue

Motorola

Related People

Eric Eaton: AUTHOR [+3]

Abstract

When a Nationwide pager user travels from one transmitting zone to another, the user is generally uncertain as to when the receiver is in range of the new transmitter on which information will be sent. By using a selective call receiver which receives and decodes transmitted channel identification information in a Nationwide communication system (such as that described in United States Patent 4,644,347 to Lucas et al), and which includes a location alarm, one can remove this uncertainty.

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MOTOROLA INC. Technical Developments Volume 12 April 1991

LOCATION ALARM

by Eric Eaton, Loran Pleasanton and Jack lndekeu

  When a Nationwide pager user travels from one transmitting zone to another, the user is generally uncertain as to when the receiver is in range of the new transmitter on which information will be sent. By using a selective call receiver which receives and decodes transmitted channel identification information in a Nationwide communication system (such as that described in United States Patent 4,644,347 to Lucas et al), and which includes a location alarm, one can remove this uncertainty.

  A Nationwide paging system is comprised of many small paging systems having one or more transmitters which may or may not be at different frequencies and which transmit channel identification information identifying the Nationwide commun- ication system. A list of the possible locations belonging to the Nationwide communication system is stored in the memory of the receiver (Figure 1 #2). The user scrolls through the memory until a proper future location is displayed on the Nationwide receiver (Figure 1 #3). The user then enters the selected location into the Alarm Memory slot by activating a switch (Figure 1 #4). The Nationwide receiver, as shown in Figure 1, has scanning capabilities for searching for a transmitter assigned to the Nationwide system to which the user has subscribed. Once a carrier has been received on the selected channel, the transmitted information is decoded by the microprocessor (Figure 1 #l) and a comparison between the selected identification information stored in the Alarm Memory on the MPU, and the identification information transmitted will be performed. An alert is activated when there is a match between the decoded identification information and the selected information stored in the Nationwide

receiver Alarm Memory. This...