Ring-type local area network

Details Ring-type local area network Ring-type local area network

1991-06-05

1993-10-26

Safourek, Benedict V.

Multiplex communications

Wide area network

Packet switching

370 8515, H04L 1256

Patent

active

052572595

ABSTRACT:
In a ring-type LAN, in the decoder of a communication station, a symbol series is decoded from a signal transmitted through the medium of a transmission path and then a synchronization symbol is detected and a first symbol series is synchronized with the synchronization symbol and outputted. Next, in the plurality of dividers of the communication station, only the specific symbols which are used in the LANs of the different protocols are extracted from the first symbol series and a second symbol series are created and outputted. Then, in the plurality of LAN connectors, the second symbol series are inputted and the processing and replacement of the second symbol series is conducted by means of predetermined protocols and new symbol series are outputted. Next, in the combiner, the plurality of symbol series are combined and a new symbol series is outputted. Next, in the encoder, a synchronization symbol is encoded at regular intervals into the symbol series outputted from the combiner and a new symbol series is created. At this time, in the case in which a plurality of symbol series does not exist, a symbol which indicates the nonexistence of a symbol series is inserted and a new symbol series is created. Then this symbol series is encoded into a transmission signal and outputted. The above operations are conducted in sequence in each of the communication stations.

REFERENCES:
patent: 4450554 (1984-05-01), Steensma et al.
patent: 4637014 (1987-01-01), Bell et al.
patent: 4939718 (1990-07-01), Servel et al.

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