Research And Implementation Of QoE Evaluation Mechanism For Multipath Relay Transmission Network Service

With the continuous advance of the tri-networks integration,the next generation network continues to develop diversified media network transmission services and meet user service quality of experience(QoE)is the ultimate goal of network services.At the same time,the single-path transmission mode based on traditional routing technology is difficult to effectively support resource scheduling which is based on the traditional routing technology of single-path transmission mode,even has severely restricted the development of communication services.Thus multipath relay transmission mode based on the application layer overlay network comes into being,which is an important way of media network transmission services to achieve upgrading.However,the existing mature QoE evaluation methods and quantization models are based on the traditional single-path transmission mode,so it does not apply to multipath transmission network.So to study the effective QoE evaluation models is necessary which are applicable to multipath relay transmission based on Overlay Network.This thesis studies the network service QoE evaluation models and methods based on multipath relay transmission and implements the system through collaborative evaluation mechanisms.Analysising the advantages and disadvantages by summarying the current research status and progress of bearing network QoE and mature QoE evaluation and quantization methods to summary the current problems of QoE evaluation.Based on multipath transmission mode,the video streaming services is selected as the study.Based on research results in recent years,to analysis and summary the impact factor of QoE evaluation is to set up the objective QoE evaluation model which is based on the theory of multi-objective optimization methods of optimal control theory,AHP,big data and expert system.This thesis establishes QoE evaluation system through the client/server model and achieves QoE collaborative evaluation mechanisms under the application scenarios.The major research contents and results of the thesis are as follows:Firstly,this thesis designs an integrated QoS model to establish the mapping relationship between the comprehensive results of multiple paths QoS conditions and QoE evaluation.Secondly,the main algorithm of the end-to-end integrated QoS conditions model is proposed,which is the load distribution weight calculation module based on AHP.Thirdly,the integrated multipath relay transmission service QoE evaluation system based on the client/server model and based on the theory of expert systems is designed and implemented,including the end-to-end integrated QoS conditions model and user subjective expectation model.Fourthly,this thesis implements QoE collaborative evaluation mechanisms under the application scenario of the application layer relay multipath transmission system.The user agent,relay controller and relay server implement QoE evaluation client,while the QoE monitoring server is added in the system to achieve the function of QoE monitoring server and sending the request messages and feedback messages between the client and the server are to achieve the cooperative evaluation among the path selection,load distribution and QoE evaluation.Finally,building the test environment which is needed by QoE collaborative evaluation mechanism is to test the test schemes which are to validate the validity and rationality of the proposed solutions.