Node structure supporting variable-length packet in metropolitan area ring network

Abstract

The invention relates to node structure supported extendible grouping in city zoom circle net. It is made up of de-multiplexer, optical splitter module including W optical splitters, photoelectric detection module, control transaction module, fiber delay line module including W fiber delay lines, exchanging module including a two multiply two exchanging and one multiply tow exchanging, emitter with a certain emission wavelength, wavelength down path module, and multiplexer. The control transaction adopts the frame structure with separated time slot. At the beginning of each time slot, according to the testing result of each wavelength signal in loop and its history log, the connect state of the exchanging module is determined at current time slot, and the receiving and transmission of the grouping are achieved. The node of the invention is used to fix the wavelength up path transaction, can receive grouping with many wavelength at the same time. The receiving and transmission of the grouping are not need the single purpose control channel, this can improve the level of resources utilization, assist the peeling transaction of the source node and the purpose node at the same time, and support multicast, broadcast, and the transmission of the extendible grouping.

Description

technical field [0001] The invention relates to a node structure supporting variable-length packets in a metropolitan ring network, which supports single-channel and multi-channel metropolitan ring network networking, and is suitable for metropolitan optical fibers with extremely high business bursts and variable packet lengths Ring network node device. It belongs to the technical field of optical communication network. Background technique [0002] Due to the advances in Wavelength Division Multiplexing (WDM) technology and various access technologies, the transmission problems between the backbone network and the access network have been better solved, but for Metro area networks (MAN), because the business traffic carried by it may be much larger than that of the backbone network, and the business interface is complex, it has become a bottleneck restricting the rapid development of the network. Compared with the access network and the backbone network, the metropolitan ...

AI Technical Summary

Problems solved by technology

But the cost is expensive, and the problems existing in the two structures of TT-TR and FT-TR exist at the same time, so there are few studies on this structure

[0009] The above single-channel metropolitan area network node technologies based on elastic packet ring cannot make full use of the wavelength division multiplexing capability, and each node must perform photoelectric and optical processing, while the fixed transmission and fixed reception structure based on multi-channel is not flexible, and resource utilization Low, fixed transmission and tunable reception or tunable transmission and fixed reception structure have too high requirements on the tuning delay of tunable devices, and there are problems such as transmission or reception conflicts

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