Asynchronous multi-wavelength mesh network adaptive node system based on optical packet switching

Abstract

The invention provides an asynchronous multi-wavelength mesh network adaptive node system based on optical packet switching. The system comprises N access users (U) and consists of an optical wavelength division multiplexer, an optical beam splitter, an optical wavelength division demultiplexer, an optical fiber delay line, an optical conflict resolution and switching matrix and a control processing matrix. Input user data is demultiplexed by the optical wavelength division demultiplexer and is subjected to corresponding route selection and addressing on the optical conflict resolution and switching matrix, and a data packet is transmitted to a corresponding destination port. The node has a compact structure, the switching efficiency can be improved, time delay and a blocking rate are greatly reduced, multicast and broadcast are supported simultaneously, and storage and computation pressure of a whole network consisting of the nodes can be reduced.

Description

technical field [0001] The invention relates to the technical field of communication. Specifically, it relates to an asynchronous multi-wavelength mesh network adaptive node system based on optical packet switching. Background technique [0002] In the past few years, with the increasing development of the Internet-based information network, the number of users and sites in the network has increased rapidly, and the demand for IP services, high-speed, large-capacity real-time data, video, interactive applications and sharing has grown rapidly. Bandwidth requirements have also increased dramatically. The development of optical fiber communication technology has reduced the pressure on bandwidth resources and can meet the network's requirements for bandwidth growth. However, the overall pressure on the network still exists, mainly concentrated in the low exchange efficiency, large delay, and high blocking rate between nodes. During the development of optical fiber communicat...

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Problems solved by technology

The development of optical fiber communication technology has reduced the pressure on bandwidth resources, which can meet the network's requirements for bandwidth growth. However, the overall pressure on the network still exists, mainly concentrated in the low exchange efficiency, large delay, and high blocking rate between nodes.

During the development of optical fiber communication technology, data exchange methods such as Optical Circuit Switching (OCS), Optical Burst Switching (OBS), and Optical Packet Switching (OPS) have appeared successively. Establish a permanent static optical path link between them, which is suitable for data transmission with a large throughput, but the static feature makes the link take up a long time and the reusable time is low, which cannot meet the needs of users' sudden business

The OBS-based network can meet the needs of transmitting large data streams with higher throughput, and meet the needs of small data streams with lower latency, but each link needs budget allocation, estimated time in advance, and burst The user data needs to be assembled, which will introduce a large burst assembly delay and still have a high blocking rate, which cannot meet the low-latency real-time requirements

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