An optical flow switching network scheduling method and an optical flow switching system

Abstract

The invention discloses an optical flow switching network scheduling method and an optical flow switching system. Each node in the system is mainly composed of an IP switch and an optical cross connection module. Each IP switch is provided with an optical flow switching module. The switching module includes virtual output queue, link-wavelength-time resource table, source routing table, scheduling module, control packet sending and receiving module, electrical / optical conversion module, switching control module and clock module. While sending the optical data flow, the source node starts the optical path reservation in advance for the optical data flow request in the virtual output queue, detects the availability of multiple destination nodes corresponding to the optical path, and combines the request priority of the queue head and the transmission time of the optical data flow to find Find the earliest available lightpath and reserve a time slot for the lightpath. The beneficial effects of the present invention are as follows: 1. There is no need for centralized scheduling nodes in the network, each node performs distributed scheduling, and the calculation complexity is low; 2. Optical path scheduling calculation and data transmission are performed simultaneously, which shortens the head time of data transmission, and can Improve network throughput and reduce average queuing waiting time, optimize bandwidth utilization; 3. Add time dimension to the scheduling and allocation of link wavelength resources, which can improve the performance of the algorithm; 4. Can be deployed based on existing network equipment, application conditions Mature.

Description

technical field [0001] The invention relates to an optical communication network, in particular to an optical flow switching network scheduling method and an optical flow switching system. Background technique [0002] Optical flow switching is a technology for next-generation all-optical switching networks. It is suitable for government departments, financial institutions, data centers, and telecom operators for end-to-end massive data high-speed transmission, data migration, and data disaster recovery. The basic idea of ​​optical flow switching is to dynamically establish a dedicated all-optical domain connection for each end-to-end data transmission (called optical data flow) request. The technical framework of the optical flow switching network is based on the existing network architecture, and each network node is composed of an IP switch and an all-optical switching node. The network control function and data forwarding function are logically decoupled into a control ...

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Problems solved by technology

On the other hand, due to the internal blocking characteristics of the general network topology, the time it takes to reserve an available optical path is not negligible compared to the optical data stream transmission time (that is, the optical path maintenance time)

In the traditional optical flow switching scheduling method, the optical data flow request in the input queue of the source node starts a new optical path reservation after the current data flow transmission is completed and the sending port is released, so the corresponding wavelength channel is in the The idle state reduces the channel utilization and throughput of the network and increases the average queuing delay

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