System for the transmission of information messages
First Claim
1. In a house system for the transmission of information messages which are encoded in the form of digital signals, wherein a house code specific to the house system is selected adapted for the testing of each information bit, including a central station and a series of substations at which the information messages of the central stations are selectively transmittable through the electrical power supply as a transmission path which is utilized by further similar systems, wherein each substation terminates further information evaluation on the basis of an information bit recognized as erroneous, and wherein each information message includes a selectable subsequence of digital signals specific to the house system occurring at other than the end of the total sequence of digital signals representing the information message, the improvement comprising:
- (a) said central station emitting an electrical operating signal during the duration of each information message emitted thereby;
(b) a monitoring unit for receiving the operation signal;
(c) said monitoring unit containing(aa) a receiving component for the information message connected to the transmission path;
(bb) a memory having the subsequence of digital signals having the house code specific to the house system stored therein;
(cc) a comparator means, coupled to said receiving component and said memory, within which there is analyzed the information message for the occurrence of the sequence of digital signals specific to the house system;
(dd) and a transmitting component connected at its output to the transmission path and coupled at its input to said comparator means for emitting a signal on the transmission path effectuating a code alteration in the information message when in an incoming information message on the transmission path there occurs a subsequence of digital signals specific to the house system without the concurrent presence of the operation signal emitted by said central station.
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Accused Products
Abstract
A house system for the transmission of information messages which are encoded in the form of digital signals wherein a code is selected which facilitates the testing of each information bit, including a central station and a series of substations at which the information messages of the central station are selectively deliverable through the electrical power supply wiring as the transmission path which is utilized by further similar systems. Each substation, due to an erroneously recognized information bit, will terminate the further information evaluation, whereby each of the information messages evidences a selectable subsequence of digital signals which represents a house code which is specific with respect to the applicable house system, which preferably occurs near the beginning of the total sequence of digital signals representing the information message. The central station generates an operating signal when it is transmitting information messages which is received by a monitoring unit. When an information message originating in a neighboring system with the same house code enters into the house system, then the monitoring unit emits a signal, which, due to the lack of the operating signal of its own central station, recognizes this immediately as a foreign (i.e. nonhouse) information message and emits a signal on the transmission path which causes a code alteration in the incomming information message. The substation which is addressed during the sequence receives this information message containing the code alteration, and consequenty terminates further information evaluation.
87 Citations
19 Claims
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1. In a house system for the transmission of information messages which are encoded in the form of digital signals, wherein a house code specific to the house system is selected adapted for the testing of each information bit, including a central station and a series of substations at which the information messages of the central stations are selectively transmittable through the electrical power supply as a transmission path which is utilized by further similar systems, wherein each substation terminates further information evaluation on the basis of an information bit recognized as erroneous, and wherein each information message includes a selectable subsequence of digital signals specific to the house system occurring at other than the end of the total sequence of digital signals representing the information message, the improvement comprising:
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(a) said central station emitting an electrical operating signal during the duration of each information message emitted thereby; (b) a monitoring unit for receiving the operation signal; (c) said monitoring unit containing (aa) a receiving component for the information message connected to the transmission path; (bb) a memory having the subsequence of digital signals having the house code specific to the house system stored therein; (cc) a comparator means, coupled to said receiving component and said memory, within which there is analyzed the information message for the occurrence of the sequence of digital signals specific to the house system; (dd) and a transmitting component connected at its output to the transmission path and coupled at its input to said comparator means for emitting a signal on the transmission path effectuating a code alteration in the information message when in an incoming information message on the transmission path there occurs a subsequence of digital signals specific to the house system without the concurrent presence of the operation signal emitted by said central station. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification