Wireless sensor network topology control method

Abstract

The invention discloses a wireless sensor network topology control method for the problem that wireless sensor network nodes are likely to face energy exhausting and data congestion failure problems in the data transmission process. The method comprises the steps that a node reliability model is built according to the node energy exhausting probability and congestion failure probability, node reliability maximum and longest network lifetime serve as the constraint condition, the value of the optimal node degree is obtained, the node degrees of all the nodes of a network are restrained through the optimal node degree finally, the whole network topology property can be effectively optimized by only changing the optimal node degree value, and therefore the purpose of prolonging the network lifetime is achieved. Simulation experiment results show that the congestion degree in the topology data transmission process is greatly reduced, the robustness of the topology structure is enhanced, and the network lifetime is effectively prolonged.

Description

Technical field [0001] The invention belongs to the technical field of wireless communication, relates to the performance optimization of a wireless sensor network, and specifically relates to a wireless sensor network topology control method based on node reliability. The invention enhances the robustness of the topology structure and effectively prolongs the survival time of the wireless sensor network. Background technique [0002] With the continuous research and development of Wireless Sensor Network (WSN), WSN has been widely used in many fields such as military and national defense, environmental monitoring, anti-terrorism, and dangerous area monitoring. As an important part of the development of the Internet of Things, wireless sensor network (WSN) has the characteristics of large deployment scale, high node redundancy, poor distribution environment and limited resources of the node itself compared with other communication networks. For the large-scale deployment of WSN,...

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Problems solved by technology

However, none of the above studies considered that when the wireless sensor network nodes are deployed in a large scale and densely, after the congestion caused by the burst data flow, the use of congestion control measures may not be able to completely avoid node congestion, which may lead to excessive node energy. It will be exhausted soon, which will lead to the damage of the global network

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