Low-energy-consumption free space optical network repairing method based on reflection characteristics

Abstract

The invention provides a low-energy-consumption free space optical network restoration method based on reflection characteristics, and the method comprises the following steps: monitoring the sub-death state of a node according to an existing Heartbeat mechanism when a free space optical network works, and obtaining the information of the node; after the nodes die thoroughly, determining node types through node information, dividing a monitoring area into regular grids, establishing a Neyman-Pearson model according to a Neyman-Pearson judgment criterion, and determining a grid point coverage state; calculating the detection probability of the dead nodes and the surrounding grid points through the model, and finding the optimal position to repair the hole according to different node types.According to the method, an improved minimum coverage circle repairing method and an energy coverage comprehensive evaluation model are provided, dead nodes are repaired in a classified mode, networkcoverage is improved by searching for the optimal repairing position, nodes with mirrors are introduced, energy consumption is reduced, and the life cycle of the repaired network is prolonged.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a low energy consumption free space optical network repair method based on reflection characteristics. Background technique [0002] Today, the network has become a very important part of people's life, and free space optical networks (FSONs) have the advantages of high transmission data rate, high security, and irregular spectrum. In FSON, due to the very narrow beam and high directivity, uneven energy consumption and environmental impact, once some nodes fail and die, it will not only cause coverage holes, but also cause more link interruptions and reduce network monitoring data. accuracy, thus seriously affecting network performance and causing energy waste. Therefore, how to detect and repair coverage holes and restore the normal operation of the network is the main problem of FSON. [0003] At present, there is no method for repairing free-space optical networks, and...

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Problems solved by technology

[0004] The purpose of the present invention is to address the deficiencies in the prior art and provide an effective method for repairing dead nodes in free-space optical networks. On the one hand, an improved minimum coverage circle repair method is used to replace dead nodes with the least normal nodes and repair dead nodes. Holes caused by the network can improve network coverage and restore network connectivity; on the other hand, a comprehensive evaluation model for coverage energy is proposed, and creatively introduce nodes with mirrors for repair, which avoids the uneven energy consumption of nodes after repair, so that the newly added normal nodes In the case of rapid death again, the purpose of accurately repairing the hole and prolonging the network lifetime

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