Opportunistic routing method based on directional transmission in underwater acoustic sensor network

Abstract

The invention discloses an opportunistic routing method based on directional transmission in an underwater acoustic sensor network, which comprises the following steps of: 1, constructing a network model, layering the network, enabling sound velocity values of different layers to be different, and deploying a directional transducer by means of a regular dodecahedron to realize omnidirectional coverage; 2, dividing a forwarding domain: dividing the forwarding domain into a main forwarding domain and an auxiliary forwarding domain; 3, selecting a forwarding set, calculating forwarding utility values of the nodes based on fuzzy logic, setting forwarding priorities of the nodes according to the forwarding utility values, optimizing the number of the nodes of the forwarding set based on the time spent by successful transmission of the data packet, and selecting the forwarding set according to the node priorities and the optimized number of the forwarding nodes; and 4, coordinating the forwarding nodes, setting the waiting time of the forwarding nodes by considering the transmission time difference between the directional transducer beams, and coordinating the forwarding nodes to suppress redundant forwarding. The advantages of opportunistic routing and directional transducers are combined, so that the network throughput and the reliability of data transmission can be effectively improved.

Description

technical field [0001] The invention belongs to the technical field of underwater acoustic sensor network data transmission, and in particular relates to an opportunistic routing method based on directional transmission in an underwater acoustic sensor network. Background technique [0002] Underwater acoustic sensor networks have broad application prospects in water environment monitoring, marine resource exploration, and maritime security. The underwater acoustic sensor network is usually composed of base stations on the shore, surface aggregation nodes and underwater sensor nodes. The data is collected by the underwater sensor nodes and transmitted to the surface aggregation nodes through a multi-hop network. The aggregation nodes then use radio to transmit the data to the base station. Ensuring the safe, reliable and real-time transmission of data is the core problem to be solved in the underwater acoustic sensor network. The routing method of the underwater acoustic se...

AI Technical Summary

Problems solved by technology

[0011] 2. Opportunistic routing requires a forwarding node coordination mechanism to suppress redundant transmission. However, due to the characteristics of directional transducers such as beam transmission time difference, the existing forwarding node coordination strategy under the omnidirectional transmission model cannot be directly applied to directional underwater acoustic communication. surroundings

[0012] 3. The measurement of node data forwarding capability needs to consider many factors, such as energy, link quality, distance, etc. Most existing literature adopts the weighted sum of each factor to measure, but the weight value is difficult to quantify

In addition, the factors considered conflict with each other, for example, but the link quality and the distance between nodes and other factors, the existing literature usually adopts the way of multiplying two factors to make a compromise, but this way solves the conflict between factors not very effective

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