Research And Implementation Of Admission Control Algorithms For Ultra Dense Networks Based On LTE Small Stations

With the rapid development of broadband wireless access technologies and the integration of heterogeneous wireless networks,the network will face tremendous traffic in the future.The demand of users for various services is constantly increasing,meanwhile,the requirements for quality of service(QoS)of users are also constantly increasing.To meet the high-quality,high-speed business needs of end users,ultra-dense networking is an important solution to this challenge.In the ultra-intensive wireless network environment,the traditional access control algorithms can no longer meet the increasing QoS needs of users.Therefore,it is of great significance to study admission control algorithms in ultra-dense networks.According to the research status of LTE small station dense network admission control algorithms,the paper mainly studies the following three aspects:(1)A new admission control algorithm based on cross-layer effective capacity is proposed.The algorithm takes into account the quality of service and channel conditions,And the selection factor of the small base station is defined to determine the which LTE small station to the user accesses.On the basis of guaranteeing users' QoS,the load of each LTE small base station is balanced and the capacity of the ultra-dense network is maximized.The simulation results show that the algorithm does not only increase the throughput of the network,but also guarantee the QoS of users.(2)A spectrum sharing strategy and admission control algorithm in heterogeneous networks are proposed.At the macro level,two service providers provide services to users.One service provider leverages its own spectrum at a fixed price to other service providers for sharing to make better use of the spectrum.Users at the micro level make network selection according to their own satisfaction and price,this process is also dependent on the macro-level price arrangements and spectrum sharing strategy between service providers,the user to make network options distribution are also constantly affecting the macro-control strategy of service provider.Deriving the dynamics equation of state of population determined by the price and spectrum sharing under the premise of considering the population status has resulted in the optimization of the optimal price and the open access rate of service providers in order to maximize the economic benefits of the service providers.(3)Based on the idea of separation between SDN control and forwarding,a communication method for centralized control between SDN controller and small base station is designed and implemented.The resource management platform is mainly responsible for the registration and authentication functions of small base stations.Then collects network information and monitors the information of small base stations and users in real time,finally issues various control strategies.The platform displays the dynamic topology of the small base station deployment and issuance admission control.The results show that the wireless network resource management platform realizes the real-time monitoring of the whole network resources and implements the optimization of the resources of the entire network by using the admission control strategy,thus improving the throughput and performance of the ultra-dense wireless network.Finally,the article summarizes,and put forward the prospect of the next step.