Control circuit for an adaptive hybrid control in a local area n

Details Control circuit for an adaptive hybrid control in a local area n Control circuit for an adaptive hybrid control in a local area n

1984-12-10

1986-09-02

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 85, 1791708, H04L 514, H04J 302, H04B 320

Patent

active

046100105

ABSTRACT:
In a local area network having a plurality of stations coupled to a transmission line over which signals are being simultaneously transmitted and received and wherein each station includes a station controller, a transmitter, a receiver and an adaptive hybrid circuit coupled to the transmission line and between the transmitter and the receiver for adaptively cancelling crosstalk from the transmitter to the receiver, a control circuit in each station for controlling the operation of the adaptive hybrid circuit in the station. In a first embodiment of the invention the control circuit includes a first circuit responsive to a request-to-send signal from the station controller for generating a first signal to enable a signal to be transmitted by the transmitter, and a second circuit responsive to the first signal for enabling the adaptive hybrid circuit to adaptively cancel crosstalk from the transmitter to the receiver after a preselected period of time after the start of each transmission.

REFERENCES:
patent: 4292623 (1981-09-01), Eswaran et al.
patent: 4380761 (1983-04-01), Boggs
patent: 4549048 (1985-10-01), Combler
patent: 4564838 (1986-01-01), Boulogne et al.
Patent abstracts of Japan, vol. 7, No. 8, (E-152) (1153), 13 Jan. 13, 1983.
National Telecommunications Conference, 30 Nov. to 4 Dec. 1980, IEEE New York, "Random Access Packet Switches Local Computer Network with Priority Function," pp. 37.4.1-37.4.6.

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