Anchor node position obtaining method for underwater optical communication network

Abstract

The invention discloses an anchor node position acquisition method for an underwater optical communication network, which comprises the following steps: initializing states of a cable rope and an anchor node in the underwater optical communication network, enabling the anchor node to perform aligned communication, and acquiring underwater environment parameters; when the water flow speed is constant, conducting stress analysis in a balanced state on the anchor nodes, and obtaining the pulling force at the tail end of the cable; when the water flow speed is not constant, dividing the set anchor node movement time evenly into a plurality of time slots, and under each time slot, conducting dynamic analysis on the anchor nodes to obtain equivalent cable tail end pulling force; and iteratively solving an anchor node coordinate and a rotation angle by utilizing the cable tail end pulling force and the cable anchor point coordinate. According to the method, the moving position of the anchor node can be accurately obtained in the water flow, the influence of the movement of the anchor node on the received light intensity is analyzed, more reasonable communication parameters and deployment schemes are designed, the influence of the water flow on the network communication performance is reduced, and even the water flow is utilized to a certain extent to achieve a better communication effect.

Description

technical field [0001] The invention belongs to the field of underwater optical communication, and more particularly relates to a method for acquiring the position of an anchor node of an underwater optical communication network. Background technique [0002] Underwater wireless sensor network has a wide range of applications in pollution monitoring, marine data collection, auxiliary navigation and national defense security, but it also faces many challenges due to the complex underwater environment. [0003] Underwater acoustic sensing technology is a communication technology that has been extensively studied and used in underwater environments. A large number of experimental results and practical experience show that the speed of underwater acoustic communication is slow and the delay is high. Compared with electromagnetic wave communication on land, the speed is several orders of magnitude lower, which seriously affects the real-time performance of communication; The typ...

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Problems solved by technology

[0004] However, underwater optical communication usually requires the alignment of the communication link, but the drift of the anchor node is often caused by the movement of the water flow underwater, which eventually leads to the failure of the communication link and seriously affects the performance of the network. In order to reduce the impact of the water flow on the underwater The influence of optical communication network performance, it is necessary to study the movement of anchor nodes under the action of water flow

[0005] At present, although there are many underwater mobile models, they are all aimed at underwater acoustic networks, and the nodes are free to move with the water flow without any constraints; in terms of water-optical communication, most of the research is on channel models and optical signal modulation, etc., almost The effect of water flow on the movement of anchor nodes was not studied

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