Browse Prior Art Database

PAGER BASED TIME SYNCHRONIZATION OF HOUSEHOLD APPLIANCES

IP.com Disclosure Number: IPCOM000009138D
Original Publication Date: 1999-Jun-01
Included in the Prior Art Database: 2002-Aug-09
Document File: 2 page(s) / 78K

Publishing Venue

Motorola

Related People

Edward Robinson: AUTHOR

Abstract

This paper describes a method for maintaining accurate time-of-day information for household appliances by using a pager to communicate with the appliances via the home's standard electrical wiring. A pager that can extract GPS-accurate time information from the paging channel (e.g. PLEX/RePLEX), introduces a signal containing the time information onto the circuit. Any appliance that is plugged in (microwave oven, VCR, clock, etc.) can decode this signal to extract accurate time. Obvious benefits include accurate time, recovery from power failure, automatic compensation for daylight savings time and consistency of time between devices.

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MOTOROLA Technical Developments

PAGER BASED TIME SYNCHRONIZATION OF

HOUSEHOLD APPLIANCES

by Edward Robinson

INTRODUCTION

  This paper describes a method for maintaining accurate time-of-day information for household appliances by using a pager to communicate with the appliances via the home's standard electrical wiring. A pager that can extract GPS-accurate time information from the paging channel (e.g. PLEX/RePLEX), introduces a signal containing the time information onto the circuit. Any appliance that is plugged in (microwave oven, VCR, clock, etc.) can decode this signal to extract accurate time. Obvious benefits include accurate time, recovery from power failure, automatic compensation for daylight savings time and consistency of time between devices.

DESCRIPTION

  The system comprises a paging device capable of receiving GPS accurate time information (e.g. FJLEX/ReF%EX) that is connected to the electrical wiring of a home or business. The device intro- duces a signal containing the time information onto the power circuit. This signal would be introduced periodically (e.g. once a minute).

  Devices that receive power from the electrical wiring would be able to derive accurate time infor- mation by decoding the signal.

  In order for this technology to be successful, the problem of coordination between pager manufactnr- ers and appliance manufacturers must be overcome. Appliance manufacturers will not likely incorporate the decoders if the signal is not present a...