Power line access data system
First Claim
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1. A two-way communication system utilizing a power transmission network as the medium for transmitting intelligence comprising:
- a central station;
a plurality of terminal stations;
a plurality of repeaters interconnecting said central station and said terminal stations in a multi-level, tree-like network;
whereinsaid repeaters are individually addressed and said terminal stations are polled by groups, each said group of terminal stations being coupled to a single repeater at the lowest level of repeatersand said system utilizes tone code signaling in which one tone pattern has priority access to said central station.
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Abstract
A two-way communication system is disclosed utilizing power transmission lines as the transmission medium. The system is a multilevel repeater system in which each repeater has a unique address. The lowest level repeaters poll the terminal stations connected thereto in time multiplex. Transmission over the system is in the form of tone codes, each level preferably utilizing a different set of tones from the next higher or lower level.
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Citations
13 Claims
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1. A two-way communication system utilizing a power transmission network as the medium for transmitting intelligence comprising:
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a central station; a plurality of terminal stations; a plurality of repeaters interconnecting said central station and said terminal stations in a multi-level, tree-like network;
whereinsaid repeaters are individually addressed and said terminal stations are polled by groups, each said group of terminal stations being coupled to a single repeater at the lowest level of repeaters and said system utilizes tone code signaling in which one tone pattern has priority access to said central station. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification