Topology Control Of 3D Wireless Mesh Networks Based On Power Control

Wireless Mesh Networks(Wireless Mesh Network, WMN) is different from traditional networks, which is a dynamic, flexible and self-organizing network. The parameters of WMN nodes can be configurated independently, and the network connection can be established and maintained automatically. WMN has many advantages, such as data reliability, low cost networking, network maintenance is simple, wide business coverage and so on. AS a new networking technology, WMN has been the darling in the era of wireless communication.However, the node distribution is more dense in the three-dimensional WMN, so the node interference is stronger, the resource competition is more intense, and the network performance is worse. Power control technology and topology control technology to improve network performance have played a crucial role. With reasonable control of the transmission power, node interference can be reduced and resource utilization can be improved. Through the selection of topology control technology a good link performance, avoid link performance is poorer, effectively improve the network performance. In order to improve the overall performance, this paper is reseach how to effectively combine the power control technology and the topology control technology. The main work includes:1. Currently the power control algorithms of WMN are most for two-dimensional planar single optimization goal, and study of three-dimensional space optimization goal more less. This paper studies a power control algorithm in the three-dimensional WMN based on genetic algorithm(3D-PCGA), The optimization goal considering interference intensity and the node connectivity. 3D-PCGA is compared with single objective optimization. When the number of data flow is more than 21, the throughput increased by 13%, the end-to-end delay shortened by 17.5%, package submitted success rate increased by 14%.2. Most of the nodes in the topology control algorithm using maximum transmitted power, but The larger transmission power the network interference is stronger, resulting in reduced network throughput, latency increases, packet loss rate increased and other issues.Based on 3D-PCGA algorithm, studied a conflict smallest topology control in the three-dimensional WMN(3D-CSTC). Firstly this algorithm calculates the conflict link size of each link, and then selects the conflict link smaller link connected to the network.3. The important index of topology control algorithm including network fault tolerance, end-to-end delay, throughput and submit the success rate. Compared with other 3D topology control algorithm, simulation results show that: the 3D-CSTC algorithm has stronger network fault tolerance; When the node density is less than 41.25 10-′,the average node degree 3D-CSTC algorithms can be increased by 25%; When the number of data flow is more than 18, the throughput increased by 9%, the end-to-end delay shortened by 22%, package submitted success rate increased by 8%.