A Differential Based Adaptive Routing Method for Underwater Sensor Networks

Abstract

The invention generally relates to the technical field of network communication, and particularly relates to a method for routing an underwater sensor network. The method for routing comprises the following constituent parts: (1) node grade definition; (2) node grade information acquiring and updating processes; (3) neighbor node information recording; (4) directional flooding mechanism based on grade difference; (5) adaptive routing step based on the grade difference, node density and residual energy; and (6) differential geographical routing step based on the grade difference and distance. The method has the following advantages that the best next hop adaptive routing is determined on the basis of the neighbor table information to reduce redundant paths, so that the energy efficiency is improved to a great extent; and the adaptive routing adopts immediate routing, so that the inhibition time of the conventional underwater UWSN (underwater wireless sensor network) routing to a received package is avoided, and the time delay from terminal to terminal is reduced. A great deal of simulation experiments prove that through an underwater sensor network adaptive routing protocol based on the difference, the energy consumption can be reduced to a great extent, the time delay from terminal to terminal is reduced, the node utilization equity is improved, and the whole network life time is prolonged.

Description

Technical field [0001] The present invention generally relates to the field of network communication technology, and more specifically relates to a routing method for an underwater sensor network. Background technique [0002] The wireless sensor network connects the physical information of the objective world with the transmission network, expands people's information acquisition and management and control capabilities, and applies the sensor network to the underwater sensor network (UWSN Underwater Wireless Sensor Networks) into the information science Important research areas. [0003] Due to the absorption of water, the transmission distance of electromagnetic waves in water is relatively short. The transmission distance of electromagnetic waves sent by nodes that follow the IEEE 802.11b / g or IEEE802.15.4 protocol is only 50-100cm underwater. Therefore, the underwater network nodes use acoustic communication. Compared with terrestrial WSN, UWSN networks using underwater acou...

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Problems solved by technology

However, due to the use of caching and broadcast forwarding, both VBF and DBR will bring higher conflicts, energy consumption and longer delays

In addition, both VBF and DBR adopt a greedy algorithm, which can easily lead to the isolation of originally connected nodes and the loss of routes

[0010] The above underwater communication protocols cannot solve the problem of energy limitation of nodes very well, resulting in a very short life span of the network. At the same time, they cannot well solve the problems of data collision and long end-to-end delay.

Since the nodes in the underwater sensor network will move with the flow of water, resulting in dynamic changes in the topology of the network, the above communication protocols cannot solve this problem well.

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