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METHOD FOR ENSURING SYNCHRONIZATION OF TIME AND DAYLIGHT SAVING CHANGES IN A MESH TYPE OF TELEMETRY DEVICES

IP.com Disclosure Number: IPCOM000145747D
Publication Date: 2007-Jan-25
Document File: 1 page(s) / 10K

Publishing Venue

The IP.com Prior Art Database

Abstract

A collector such as the one in Elster Electricity’s EnergyAxis AMR system has a calendar that includes entries for daylight savings changes. The collector also has a clock that is kept in synchronization with reference time through one of several possible mechanisms such as:

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METHOD FOR ENSURING SYNCHRONIZATION OF TIME AND DAYLIGHT SAVING CHANGES IN A MESH TYPE OF TELEMETRY DEVICES

DESCRIPTION OF THE INVENTION

A collector such as the one in Elster Electricity’s EnergyAxis AMR system has a calendar that includes entries for daylight savings changes.  The collector also has a clock that is kept in synchronization with reference time through one of several possible mechanisms such as:

1.      Periodic synchronization with a host system (computer) within the AMR System wherein the host is kept synchronized with some standard reference time (either the corporate time server, or over the Internet or using some other reference time source appliance)

2.      Direct synchronization of collectors with any internet reference time is possible in packet based networks if the collector is enabled with IP communications and can support the network time protocol (or similar Internet time synchronization protocols). The advantage of this approach is that the collector is not dependent on constant connectivity to the AMR host to keep synchronized in time.

3.      Any combination of the above two techniques where in one of these serves as the ‘primary’  method and the other serves as the ‘alternate/backup’ for time synchronization at the collector.

Under normal circumstances, each collector keeps the underlying network of telemetry devices

synchronized in time and for DST changes through periodic network time broadcasts.

Another aspect of this invention is a telemetry device that can support network time protocol or similar protocols and can be directly synchronized to an internet reference time (assuming that the telemetry device can support IP communications)

Another aspect of this invention is a mechanism by...