Design And Research Of Gateway Network Measurement Probe Based On Open Wrt

Network measurement is the foundation of network management,in order to achieve safe,reliable,and efficient networ k environment,and to manage the network environment scientifically,network measurement and analysis based on measurement is indispensible.Today is the era of rapid development of information technology in which people's living standard has reached a very high level,the number of the user's home network has shown explosive growth trends.However,little research has been done on the me asurement of the quality of service of the home network,while network measurement Business Companies mostly concentrate on developing measurement systems for monitoring backbone network or high-speed link.With the increasingly complex network structure and the increasing of people's requirements on the network quality of services,the network service provider and network applied service providers are in urgent need of developing a suitable instrument which can not only monitor the real quality of service from the user's perspective,but also can improve the quality of the services according to the analysis of the monitoring data.Under such background,this paper takes the distributed measurement of home network as the goal,trying to design a network measurement probe based on home gateway,and provide a basis for the measuring of the home network.Firstly,this paper choices a hardware platform accor ding to the actual needs,and constructs the software platform according to the hardware configuration and the functional requirements of the complete set of probe,to build an appropriate software and hardware platform ensuring the probe's stable operation.Secondly,this paper studies the framework of Open Wrt and the method of developing application software under the Open Wrt and develops two testing tools named “mping” and “gethttp” to measure the basic performance of end to end network(delay,packet loss rate,bandwidth).At the same time,this paper also writ es tool control scripts in order to simulate the control mechanism between the probe and the measurement control server.Finally,by compiling all source files into a ipk file and install ing them to the probe platform,the main function of the probe is successfully realized.This paper not only conducts the research of network per formance testing,but also the web applications' services qualities evaluation.The gethttp tool designed by this paper can implement the measurement of the responding time of the web site.On this basis,focusing on the research of load balance technology in CDN system,and according to the implementation of the overall load balancing mechanism based on the DNS analysis,a tool named “get CDN” is developed to evaluate the effect of load balance.Through the experiments,and according to the results of the assessment of the designed tools,we can announce that the design of the probe in this paper is effective.Finally,this paper makes an conclusion and puts forward some important issues,which will be considered in future studies.