Communication control unit

Details Communication control unit Communication control unit

1989-11-08

1992-12-29

Kuntz, Curtis

Multiplex communications

Wide area network

Packet switching

370 60, 34082507, H04J 324

Patent

active

051757303

ABSTRACT:
A communication control unit controls data transmission and reception between a terminal and a communication network which includes a full duplex communication path, and a communication is made by transmitting a sending signal which includes a destination address of a destination terminal and transmitting a returning signal when the destination address is confirmed. The communication control unit comprises a first part for timing a first time from a start of a transmission, timing a second time when the first time elapses and stopping the transmission when the returning signal is received within the first time and also when no returning signal is received even after the second time elapses, a second part for detecting the sending signal, comparing an address which is included within the detected sending signal and home address of a terminal to which the communication control unit is connected and transmitting the returning signal when the two compared addresses coincide, and a third part for limiting a start of the first control part and the acknowledge signal transmitting part until a state in which no signal exists in the communication path continues for a third time.

REFERENCES:
patent: 4063220 (1977-12-01), Metcalfe et al.
patent: 4803681 (1989-02-01), Takahashi
patent: 4839887 (1989-06-01), Yano
patent: 4903016 (1990-02-01), Murai et al.

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