Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Patent
1991-12-30
1994-02-22
Pascal, Leslie
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
359124, 359135, 359165, 370 73, 370 76, H04J 1402, H04J 1404
Patent
active
052893022
ABSTRACT:
A supervisory node (2) and non-supervisory nodes (3 through 9) are connected in a loop by an optical transmission path (1). Over the loop (1) are transferred optical signals having wavelengths of .lambda.1 through .lambda. n. An access right control packet 10 is transferred in the loop at the optical wavelength of .lambda.1. A node performing data transmission by line exchange writes its own node address (SA), the destination address (DA) and transmit reservation in the header of the access right control packet 10, and sends the packet out on the optical transmission path. The supervisory node 2 having received this access right control packet writes the wavelength to be used (.lambda.i) into the used wavelength field (UWL), and notifies the transmit and receive nodes of the choice of the wavelength. The transmit node sends data to the receive node by line exchange at the designated wavelength .lambda.i.
REFERENCES:
patent: 4797879 (1989-01-01), Habbab
R. M. Falconer et al, "Orwell: a protocol for an integrated services local network", Br. Telecom. Technol. J., vol. 3, No. 4, Oct. 1985, pp. 27-35.
NEC Corporation
Pascal Leslie
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