Local area communication network

Details Local area communication network Local area communication network

1981-09-22

1984-05-29

Yusko, Donald J.

Communications: electrical

Continuously variable indicating

With meter reading

370 60, 370 94, 3408255, H04Q 900

Patent

active

044518277

ABSTRACT:
A communications network for providing full-duplex data transfer between any two network interface units on a one-to-all-others contention bus. Network interface units (NIUs) send and receive data signals on outgoing and incoming links, respectively, which are connected to junction boxes which couple the incoming link connected to one network interface unit to the outgoing links of only the other NIUs. The data signals have source address codes and destination address codes applied thereto, which codes are examined by each NIU receiving a data signal to determine (1) if the NIU will accept the data signal for processing and (2) if full duplex data transfer is occurring. Transmission of all data signals in the network is temporarily aborted when any two NIUs are transmitting data signals and at least the signal transmitted by one of the NIUs is not addressed to the other NIU.

REFERENCES:
patent: 4156798 (1979-05-01), Doelz
patent: 4201891 (1980-05-01), Lawrence et al.
patent: 4347498 (1982-08-01), Lee et al.
patent: 4380063 (1983-04-01), Janson et al.
"Data Processing-Open Systems Interconnection-Basic Reference Model", ISO/TC 97/SC16/N537 (DP 7498), American National Standards Institute, N.Y., N.Y.

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