Data transfer method and system in low voltage networks
First Claim
1. A data transmission method for two-way communication using low-voltage systems linked to a higher order telecommunication network, wherein data transmission within the low-voltage system takes place at a high-frequency range of up to 30 MHZ using band spreading of data signals and a transmit level below the specified interference or noise voltage limit of line and radio disturbances characteristics, in that said band-spread data is given a direction coding to specify a logical direction within the low-voltage system to enable multiple-user operation using different sequences of a family of pseudo-random numbers, and in that a correlator identifies in attenuation-dependent intervals by means of the given sequences the binary data sequences, being user-specific spread and direction-specific coded, within the low-voltage system, regenerates the binary data sequences and assigns new direction codes to them for forwarding the signals.
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Abstract
This invention relates to a method for data transmission in two-way communication via low-voltage systems that are linked to a higher order telecommunication network. Data transmission takes place within the low-voltage system at a high-frequency range of up to 30 MHz using band spreading of data signals and a transmit level below the specified radio interference or noise voltage limit, in that said band-spread data is given a direction coding to specify a logical direction within the low-voltage system using different sequences of a family of pseudo-random numbers to enable multiple-user operation, and in that the binary sequences of data with their user-specific spreading and direction-specific coding are identified by correlation using specified sequences at attenuation-dependent intervals within the low-voltage system, then said data sequences are regenerated and assigned new direction codes for forwarding.
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Citations
29 Claims
- 1. A data transmission method for two-way communication using low-voltage systems linked to a higher order telecommunication network, wherein data transmission within the low-voltage system takes place at a high-frequency range of up to 30 MHZ using band spreading of data signals and a transmit level below the specified interference or noise voltage limit of line and radio disturbances characteristics, in that said band-spread data is given a direction coding to specify a logical direction within the low-voltage system to enable multiple-user operation using different sequences of a family of pseudo-random numbers, and in that a correlator identifies in attenuation-dependent intervals by means of the given sequences the binary data sequences, being user-specific spread and direction-specific coded, within the low-voltage system, regenerates the binary data sequences and assigns new direction codes to them for forwarding the signals.
- 12. An arrangement for data transmission comprising a low-voltage system, in which data transmission takes place at a high-frequency range of up to 30 MHZ using band spreading of data signals users connected to it via user terminals, local line distributor boxes and network stations, and a higher order telecommunication network connected to said low-voltage system, characterized in that network interworking units are assigned to the network stations to link the low-voltage system and the higher order telecommunications network and for channel assignment in the respective transmission medium, and that repeater units are placed at specific distances in the low-voltage system for regenerating and direction-specific forwarding of the data signals to a subsequent repeater unit or to a user terminal or to a network interworking unit.
Specification