Clustering-based Dynamic Topology Control Method for Wireless Optical Communication Networks

Abstract

The invention provides a dynamic topology control method of a wireless optical communication network based on clustering, in order to perform clustering by using a link retention time as a link weight, so that the intra-cluster topology has a small change range, thereby improving the stability of the topological structure of the wireless optical communication network. The method comprises the following steps: initializing the wireless optical communication network; scanning, by each node, a neighbor node to acquire a neighbor node set Vn; selecting the neighbor node from the set Vn, and calculating the link retention time; establishing an intra-cluster link by using the link retention time; initializing an inter-cluster candidate node set VA and an inter-cluster link priority queue W; selecting an inter-cluster link from the set VA, storing the inter-cluster link in the priority queue W, and selecting the inter-cluster link; connecting the inter-cluster link to construct the topological structure of the wireless optical communication network; and when a node logs in or logs out from the network or when the operation time of the network reaches a topology update period T, performingtopology update on the topological structure of the network to accomplish the topology control.

Description

technical field [0001] The invention belongs to the technical field of optical communication, and relates to a dynamic topology control method of a wireless optical communication network, in particular to a cluster-based dynamic topology control method of a wireless optical communication network, which can be used for dynamic topology control of a wireless optical communication network under a mobile node . Background technique [0002] Optical communication refers to the communication method using light wave as the carrier, including optical fiber, wireless light, and visible light and other communication technologies. Among them, Optical Wireless Communication (OWC) refers to the use of ultraviolet, blue-green, infrared and other bands (typical values ​​are 266nm, 450-570nm, 850nm, 1310nm, 1550nm, 10.6um) as the carrier of communication information. / Sea water / free space is a communication method for information transmission as a transmission medium. As a new type of com...

AI Technical Summary

Problems solved by technology

The advantage of this method is that the lower-layer nodes have the function of node rescue, forward data to the surrounding nodes that cannot be connected to the base station, and use the local Delaunay triangulation method to control the topology of the upper-layer nodes, which enhances the network connectivity to a certain extent. Only link reliability is used as the link weight to establish a single link. The link is easily disconnected under mobile conditions, resulting in poor link stability and unstable network topology.

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