Importance

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Abstract

A communication system includes a first communication device, a second communication device, and a communication channel, such as modems and a telephone line, between the devices. The first device includes: a first memory for storing first information, a first processor, and a first communication controller for transmitting a message. The first processor periodically determines a plurality of values, and a count of any of those values which changed after a previous determination of those values. The first processor also alternatively selects for transmission in the message, as a function of the count, either (i) all of the values, or (ii) the values which changed. The second device includes: a second memory for storing second information, a second communication controller for receiving the message, and a second processor. The second processor alternatively updates the stored second information with either (i) all of the values, or (ii) the values which changed of the message. The second processor also processes the stored second information.

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First Claim