Research On Network Cooperative Transmission Mechanism Oriented Multi Type Service

In recent years,the parallel transmission of heterogeneous network has been developed rapidly,because it can improve the utilization ratio of the network resources and the system throughput compared with the single network transmission mode.Heterogeneous network parallel transmission means that in the heterogeneous network environment,user services use different wireless network resources for transmission.Not only the data transmission rate is improved,but also the network resources are allocated reasonably.Most of the existing researches focus on the network,which aims to improve the throughput and transmission performance of the network,the user centered research is not much.In fact,with the user as the research center,to enhance the user experience is the heterogeneous network parallel transmission research also need to focus on aspects.The performance of QoS provided by wireless network technology is different,and the demand of QoS is different.If assigning servieces to a suitable wireless network based on it needs to make full use of network resources and change the traditional single access transmission,it can effectively improve the network resource utilization and user experience.In order to improve the efficiency of network resource utilization and user experience in the network parallel transmission,we studied the network selection and the streaming strategy of the sending service.Specific research contents are as follows:1.For the problem that in the current access selection algorithm most of the researches focus on how to select the best single network and there are few researches for multi network parallel transmission which focus on user and service features,this paper proposes a multi service network selection strategy oriented to service features.The strategy is centered on user services.And Firstly,the services are divided into four different types,and the multi-attribute decision-making model is established,and assigning different network parameters according to different types of services.Then,the utility function is established to select the suitable multi network transmission combination for different types of services;Finally,the MATLAB simulation results show that the algorithm can effectively improve the service satisfaction rate,the throughput of the terminal and the network resource utilization.2.The research focuses on single user parallel multiple access service shunt method in heterogeneous wireless networks in the view of the current shunt strategy which lacking of consideration of the benefits,and proposes a multi service oriented triage strategy.Firstly,this strategy introduces the concept of economics to establish a utility function shunt strategy.And the data transformation problem is transformed into the optimal solution by using the Markov chain method.Then,aiming at the defects of traditional optimization problems,an improved method based on particle swarm optimization is proposed.And Through the improved method,we can solve the problem of shunting,and obtain the network shunt value with minimum delay.Finally,the results of computer simulation show that the obtained results can be optimized.