Network system

Details Network system Network system

1985-07-25

1987-06-16

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370100, H04J 306

Patent

active

046740848

ABSTRACT:
A network system having a single-wire common signal transmission line for interfacing a serial bit data string between a plurality of data stations connected thereto comprises: (a) first means for repeatedly generating an address information bit signal based on a predetermined time series code for each predetermined synchronization timing, modulating each address information bit signal into a synchronous signal having a frequency which is varied according to a bit status of each address information bit signal, and outputting the modulated synchronous signal to the common signal transmission line so as to superpose on the serial bit data string, (b) second means provided within each station for demodulating the synchronous signal derived from said first means according to the frequency thereof so as to extract the bit status of the address information bit signal, (c) third means provided within each station for reproducing a signal corresponding to the predetermined time series code generated in said first means on the basis of the extracted bit status of the address information bit signal, (d) fourth means for discriminating each bit combination pattern of a predetermined data length from the reproduced signal of said third means, and (f) fifth means for determining an operation mode of the station on the basis of each bit combination pattern discriminated by said fourth means.

REFERENCES:
patent: 3938144 (1976-02-01), Pederson et al.
patent: 4205200 (1980-05-01), Parikh et al.
patent: 4227178 (1980-10-01), Gergaud et al.
patent: 4386426 (1983-05-01), Pugh
patent: 4484190 (1984-11-01), Bedard
patent: 4538262 (1985-08-01), Sinniger
patent: 4580261 (1986-04-01), Pelotte
Ein byteserielles bitparalleles Schnittstellensystem fur programmierban mebgerate-DIN IEC 625 Teil 1 Mai 1981.
Wie funktioniert der IEC-Bus?-Elektronik 1975.
Microprocessor Interfacing Techniques-ZAKS.

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