All-optical sharing cache router based on optical fiber delay lines and working method of all-optical sharing cache router

Abstract

The invention discloses an all-optical sharing cache router based on optical fiber delay lines and a working method of the all-optical sharing cache router. The router comprises a sharing cache queue and a logic control unit. The sharing cache queue is composed of N input ports, N output ports, N discarding ports, a (N + M) * (N + M) non-blocking optical switching matrix and the M optical fiber delay lines. By arranging the lengths of the optical fiber delay lines and using an optical packet schedule algorithm based on sorting, according to the router and the working method thereof, the priority dispatch sharing cache optical router function under any optical grouping reaching situation can be simulated.

Description

technical field [0001] The invention relates to an all-optical router structure, which specifically utilizes fiber delay lines to realize dynamic buffering of optical packets, realizes sharing of optical buffers through a feedback structure, and then ensures priority scheduling of optical packets through a scheduling strategy based on sorting and makes full use of optical fiber delays Line storage resource, realizes an all-optical shared cache router structure based on fiber delay line. Background technique [0002] In the optical transmission network, since there is no physical optical memory, at the network nodes that transmit information in a store-and-forward manner, people usually first convert the arriving optical signal into an electrical signal, and then pass it through the electrical memory ( Such as RAM) storage, and then converted into an optical signal and sent to the optical channel when the port is idle. However, this "optical-electrical-optical" conversion me...

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Problems solved by technology

For a small number of optical packets, this implementation is relatively simple, but in the actual network node, each port will have a large number of optical packets pouring in continuously. In this case, how to ensure that the optical packets are arranged in a certain order without Collision-leaving is an important and challenging task in optical packet-switched networks

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