Facing High Spatial Reuse Performance Analysis Of Cca And Power Control Scheme

Improving spatial reuse in wireless network has been recognized as a key to improve the network capacity,especially in high density deployment environment.With CSMA/CA protocol,there will be massive interferences in dense deployed WLAN system.We propose an CCA and power control scheme to solve this problem.In order to propose and validate our scheme,we construct an SDN-based WLAN adminis-trative platform.It is built on a dense deployed WLAN system which is used for testing novel strategies.It uses browser-server architecture.Server communicates with SDN controller through api interfaces.Server gets data from SDN controller,organizes the data and shows it on the front-end page.The platform provides monitoring and management functions of network equipments,users and topology.Then we propose a united scheme to upgrade the spatial reuse in dense deployed network.With the help of SDN,this scheme solves hidden nodes and exposed node directly instead of finding balance between them.Thus it increases throughput significantly.We find the relationship between APs and users by their relative locations.Then with the global vision from SDN controller,we can manage the configuration of each AP dynamically.Finally,we can get better performance.We test our scheme in the testing system.The results show that our scheme gains about 25%upgrade in throughput.