Performance Evaluation And Analysis Of Wireless Networks

With the increasing maturity of wireless communication technologies,wireless networks are widely used.The wireless network is simple to build and has a wide range of implementation.However,the performance of wireless networks is less stable than wired networks.It is not only susceptible to environmental weather,but also affected by user service arrival models and access protocols.The variability of wireless networks makes performance analysis of wireless network very difficult.In order to have a good experience for users in wireless network services,it is especially important to accurately evaluate and analyze the performance of wireless networks.In view of the shortcomings of existing wireless network performance testing methods,a PC-side wireless network performance testing system is developed through MFC based on existing wireless devices by combining service arrival model and network protocol.Based on the continuous analysis and testing of network performance,the main factors affecting the performance of wireless networks are studied.The main contents of this thesis are as follows: 1.The data services of this system are generated by ON/OFF arrival model and CBR service model respectively,and the voice services are also produced to implements real-time VoIP functions.By selecting the corresponding service through the interface part of the system,and the user can perform wireless transmission and reception in the node control part.During the wireless network test,statistical analysis of the wireless network performance is performed and the display is stored.2.In order to simulate the working principle of the wireless ad hoc network to transmit user services,the system focuses on the simulation of Error control at data link layer,the time division multiple access at MAC sublayer module,UDP socket transmission at the network port module and each the node's network synchronization function.At the same time,the working mechanism of software simulation when multi-node operation and signal transmission are designed.3.In terms of wireless network performance,data transmission success rate,network throughput,average transmission delay and service capacity are tested and analyzed.This paper aims to explore the impact of different service generation models and data transmission rates on wireless performance.Therefore,the performance test analysis of networks with different service models and data transmission rates is conducted to explore the factors affecting the performance of wireless networks and to test the stability of the system.The test results show that the system protocol is accurate and efficient,the interface is stable and flexible.In addition,the service capacity can reach the maximum capacity of the whole network,and other performances also change within the theoretical range.Wireless network performance is good.At the same time,after extensive testing,it is found that the network performance is optimal when the service generation rate and the data transmission rate are equal.