The Design And Implementation Of Wireless Ad Hoc Network Data Transmission System Based On Network Coding

Wireless Ad Hoc network does not need any hardware infrastructure support can also quickly and easily build a communication network. Each node in the network composed of mobile hosts, it allows people to communicate anywhere and anytime. In recent years, Ad Hoc wireless network in the military and civilian aspects have been widely used. However, the wireless Ad Hoc network topology compared to the other wireless networks have multi-hop dynamic characteristics, traditional routing mechanism is difficult to achieve an efficient and reliable data transmission, the network coding technology applied to wireless Ad Hoc network can solve these problems. Network encoding is a new type of information exchange technology. It is based on the traditional routing technology and combines the encoding algorithm, so that the nodes in the network can make some encoding processing for received data,which can improve the network throughput, save the network bandwidth, improve the network robustness, and balance the network load. Therefore, the network encoding has important theoretical value and broad application prospects.This paper mainly studies on the design and implemention method of the system which can improve th network transmission efficiency and the network throughput by using network encoding in the wireless Ad Hoc network data transmission process.The main work of this thesis is:1.Since the capacity of wireless Ad Hoc network is small and it needs multi hop routing, etc. This paper presents a data transmission scheme for wireless network based on the network of encoding. The scheme is aimed at the topological structure of Ad Hoc network. It is assumed that two independent information flow in and a system model based on information exchange is established and it reduces the transmission times of the same amount of information,improves the efficiency of data transmission and improves the throughput of the system through the design of the double buffer queue of nodes and the encoding algorithm.2.In view of the characteristics of the asynchronous network data stream information exchange, if we adopt the passive waiting for the encoding transmission strategy, the throughput of the system can be lower than the traditional routing method. This paper presents a data exchange scheduling strategy based on 01-chosen asynchronous network. Compared with the control strategy based on queue length, the proposed method has lower implementation complexity and lower complexity than the delay based wait control.3.In order to verify the superiority of the proposed algorithm, this paper designs and implements a wireless Ad Hoc network data transmission system based on network encoding on the Vx Work operating system and a protocol model for the system is designed. Simulation results show that the transmission efficiency of wireless network data transmission scheme based on the network is better than the traditional storage scheme, and the system throughput is improved more than 20%.