System for synchronous measurement in a digital computer network

Details System for synchronous measurement in a digital computer network System for synchronous measurement in a digital computer network

1989-05-17

1991-01-01

Yusko, Donald J.

Communications: electrical

Continuously variable indicating

With meter reading

340825070, 340825050, 340825520, 340870040, 370 94100, G06F 1300, H04Q 900

Patent

active

049821857

ABSTRACT:
A synchronous distributed measurement system in a digital computer network comprising a master node and a plurality of slave nodes interconnected by communications links to form a ring. The master mode includes a message transmitter for transmitting a synchronizing message over a communications link. Each slave node includes an operational portion for performing selected operations. A message receiver receiving the synchronizing message from a communications link, and a message transmitter responsive to receipt of the synchronizing message for retransmitting the synchronizing message over the communications link. An operational control portion starts the measurement portion a selected delay time after the message receiver receives the synchronizing message, the delay time providing that the operational portions of the slave nodes perform the measurements in synchronization.

REFERENCES:
patent: 4161634 (1979-07-01), Bellisio
patent: 4476469 (1984-10-01), Lander
patent: 4530045 (1985-07-01), Petroff
patent: 4637013 (1987-01-01), Nakamura
patent: 4742335 (1988-05-01), Vogt
patent: 4849752 (1989-07-01), Bryant
patent: 4855729 (1989-08-01), Takenchi et al.

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