Patent EA-001921-B1 (EA)
Title: Data transfer method and system in low voltage networks
Inventor: BRANDT FRANK
IPC: H04B3/58
Filed: 1997-09-09
Abstract: 1. A data transfer process in a two-way communication via low voltage networks connected to a telecommunication network, characterized in that the data transmission on the low voltage network is carried out in a high frequency range up to 30 mHz, with a strip display of data signals and a transmission level below the radio-and-line-interfering voltage-limit, while signals displayed by pseudo-random numbers are provided to ensure a multi-user structure with various sequences within a family in order to give a logical direction on the low voltage network with a directional codification, whereby the binary data sequences in the low voltage network which are displayed in relation to the users and those which are characterized in relation to the direction, are recognized in a correlator at intervals determined by the damping rate by means of the sequences which are prescribed, regenerated and evaluated with a new directional characteristic for rerouting signals. 2. The process as claimed in claim 1, characterized in that specific for the user strip display of data signal is carried out with sequences of one or several selected families of pseudo-random number sequence, such, as for example, golden sequences. 3. The process as claimed in claim 2, characterized in that for dejamming mutual interferences from different sub-bands of user networks, neighboring pseudo-random number sequences do not contain one-type sequences. 4. The process as claimed in claims 1 to 3, characterized in that a preset assignment of a logical direction of data stream on the low voltage network after spreading the band using direct sequence technics is carried out multiplying the data stream by the Walsh sequence. 5. The process as claimed in claim 4, characterized in that the length provided for direction coding of the Walsh sequences are less than usable sequences of the band spreading. 6. The process as claimed in claims 1 to 3, characterized in that a preset assignment of a logical direction of data stream on the low voltage network is carried out by purposeful structural assignment of selected families of the pseudo-random number sequences to some network sub-bands, which are surrounded by two blocks of data preparation or a block of network transfer and a block of data preparation. 7. The process as claimed in claims 1 to 3, characterized in that for choosing a direction by the method of time or frequency multiplex, transfer of band spreading signals in the direction of transmission and reception occurs always in peculiar time intervals or frequency bands. 8. The process as claimed in claims 1 to 7, characterized in that during transmission levels of separate blocks for the network sub-band is regulated so, that at receiving units of the block for the signal preparation or a block for the network transfer, all superimposed signals of one frequency have about the same level in a controllable time interval. 9. The process as claimed in claims 1 to 8, characterized in that before the data transfer an initialization phase is provided via transferring the initialization sequence together with the identification number of a corresponding user, user's terminal device and requested sequence, and following it sequence setting of spreading for a corresponding user. 10. The process as claimed in claim 9, characterized in that the identification codes of a corresponding user and a user's device after transferring the initialization sequence are checked in the telecommunication network in respect to allowance of the user's terminal device and the properness of the user's communication. 11. The process as claimed in claim 9, characterized in that trouble signals can be disconnected using the initialization sequence. 12. A system as claimed in any of the preceding claims comprising a low voltage network connected to it user's terminal devices, local distribution switches and to networks stations, as well as to a telecommunication network, wherein the network stations are provided with block of network transfers as a communication element between the low voltage network and the telecommunication network, while blocks of signal preparations are provided in the low voltage network, characterized in that the blocks of network transfers (8) positioned at distances determined by the damping rate, the blocks of signal preparations (7) and the user's terminal devices (6) are destined for spreading signal data band with the predetermined radio signal voltage limit and an interference level of transmission, being lower, and for encoding a signal data direction, as well as additionally provided blocks of signal preparations (7) for regenerating data stream dependant on the retransmission direction. 13. The system as claimed in claim 12, characterized in that communication elements of functional blocks (10), frequency distribution filters or filters (34), adjustable low-noise input amplifiers (23), an IQ demodulator (11), a modulator (9), an adjustable output amplifier, a corrector (24), a CDMA processor (18), a coder/decoder channel (25), a speak/data multiplexer (26), a speak and service interface (27), a data interface (28), SIM (subscriber identity module) (30), a code identification block (29) of the system, a microprocessor (31), a central block of clock supply (32), a synchronization unit (33), a block of emergency power supply or a power supply block (34), and adjusting devices for regulation of reception and transmission levels. 14. The system as claimed in claim 13, characterized in that the CDMA processor (18) is provided for strip display of data signals and for marking a code of the direction identification with the preset sequences of the band spreading, a modulator (9) for modulating said signals on the carrying frequency, an amplifier (22) for coordinating an input level for a receiving unit to obtain an optimum result of correlation and a communication network element (10) for transmitting spreaded and directionally encoded data stream in a low-voltage line (2) for retransmission on the block of signal preparation (7) or on the block of network transfer (8). 15. The system as claimed in claims 12-14, characterized in that the structure of the block of signal preparation (7) substantially corresponds to the structure of the user's terminal devices (6), wherein blocks of signal treatment and, in an appropriate case, parts of block for providing clock impulses and synchronizing devices are calculated according to a number of channels to be restored multiplied by a number of signal directions, and correlated signals from the channel decoding device directly or via communication matrix (41) can be transmitted to a next channel encoding device and controlled by a microprocessor (31) or a specific user's scheme, a value memory device (37) for laying working distribution channels with corresponding identification directional codes, which is provided for usable sequence and other information for the source and the signal destination place. 16. The system as claimed in claim 15, characterized in that the block of signal preparation (7) is designed for use in local distribution switch (3) in accordance with a number of the network sub-areas to be connected to an additional network communication elements modulators, demodulators, adjustable output and low-noise input amplifiers, units for adjusting transmission and reception signals, and frequency dividing filters or frequency filters. 17. The system as claimed in claims 15 and 16, characterized in that the CDMA processor (18) of the block of signal preparation (7) connected to a corrector comprises an integrator (12) and a threshold detector (13) from the receiving side for repeated receiving of data, wherein the CDMA processor (18) is provided with a multiplier (17) for multiplying on the transmitting side a restored identification data signal by a spreading sequence (19) and directional identification code (20) of the terminal user's device (6) to be addressed or the block of signal preparation (7). 18. The system as claimed in claims 12 to 17, characterized in that the structure of the block of network transfer (8) corresponds to the structure of the block of signal preparation (7), but functional groups of signal digital treatment (18, 24, 25) and, in an appropriate case, providing with clock impulses (32) are calculated repeatedly but, at least, in accordance with a prime number of communication channels prepared for telecommunication network (48), including synchronization channels required for each low-voltage line, and the network communication elements and low voltage front ends in accordance with a number of low-voltage bands, wherein a microprocessing system is provided for channel allocations using configurations of a communication matrix and the CDMA processors. 19. The system as claimed in claim 18, characterized in that an identification code of the system block is provided as well as a memory device of values for storing all active data compounds such as a path information, channel distribution, a signal quality, a code for identification user's terminal device and an assigned transmission channel for the telecommunication central control post. 20. The system as claimed in claim 18 or 19, characterized in that between a coupling matrix (41) and the transfer system for the telecommunication network (8) a system and protocol of coordinating data speed transfer and data format are provided for the data service. 21. The system as claimed in claims 18 to 20, characterized in that decoded signal data is transmitted to the transmission system via a communication matrix and transmitting systems n* 2 Mbit/s or radio connections at n = 1, 2, 3... are provided on the side of the telecommunication network. 22. The system as claimed in claims 12 to 21, characterized in that all active components of the block are connected to the power supply unit (35) and in conjunction with an emergency power supply u