Research On Scheme Of Campus Wireless Network Layout In Heterogeneous Environment

With the rapid development of information technology,there is an increasing demand for wireless networks through all walks of life,and the quality requirements for wireless networks are also increasing.As the basic link in the process of wireless network deployment,the effect of wireless access point deployment directly affects the user's use effect.In the process of wireless network deployment,the staff often chooses the wireless access point according to the work experience,often ignoring the interference between adjacent access points,the attenuation of wireless signals in heterogeneous isolation media and interference between adjacent AP in heterogeneous space are neglected,which wastes network resources and results in poor network experience.In view of the problems of wireless network deployment,this paper simulates the signal intensity of wireless AP by using wireless intelligent management platform,establishes the attenuation model and interference model of wireless signal,and puts forward the corresponding deployment scheme according to the different spatial structure.The research contents and conclusions of this paper are as follows:(1)Research on attenuation model of wireless signals in heterogeneous isolation media.The signal strength-distance formulas under different power and different thickness obstacles are simulated and tested by wireless intelligent management platform.The attenuation model of wireless signal is established.The simulation model is compared with the measured model.The results are similar and the accuracy of the simulation results is verified.By analyzing the influence of power on the attenuation model of wireless signals,it is found that power has an effect on the constant term of the signal strength-distance formula,and the constant value is close to linear change with the change of power.The attenuation models of wireless signals in four kinds of isolation media are constructed.It is found that the influence of isolation media on signal strength-distance formula is a constant term.(2)Research on multi-AP interference model in heterogeneous space.The signal strength values of adjacent AP at different distances under different power are tested,and the optimum distance values of adjacent AP signal at the weakest interference are studied.The results show that within a certain distance range,with the increase of the distance between adjacent AP,the intensity of test AP signal decreases first,then increases and then decreases.When AP power is 5dBm,the optimal distance between AP is 15 m and 10 dBm.When AP power is 15 dBm,the optimal distance between AP is 18 m.When AP power is 15 dBm,the optimal distance between AP is 24 m.When AP power is 20 dBm,the optimal distance between AP is 27 m.According to the research results,the interference model between adjacent AP is established.(3)Integrated deployment and analysis of wireless networks in heterogeneous environments.According to the attenuation model of wireless signal and the interference model between adjacent AP,by laying multiple wireless AP in heterogeneous space of heterogeneous isolation medium and simulating with wireless intelligent management platform,it is found that AP is located above the low attenuation of heterogeneous isolation medium such as room doorway,which has the best signal propagation effect and achieves the optimal layout of wireless AP.By monitoring of packet loss rate,network rate,signal strength and coverage in office buildings and teaching buildings where wireless APs have been deployed,and evaluation of wireless quality of office buildings.The results show that the Internet access is good and the user experience is good.