Research On The Network Situation Awareness Technology In Software Defined Wireless Networks

Nowadays wireless networks nearly cover everywhere.However,with network protocal closely coupled with underlying physical device,existing wireless network has closed network management and is difficult to deploy new technologies or change network configurations according to the user's service need.In order to solve these problems,this article will focus on the WLAN(Wireless Local Area Network)network and research the network situation awareness technology in the SDN(Software Defined Network)based wireless network architectures.Firstly,this article will take SWAN(Software Defined Wireless Access Network)architecture as the research background,and propose the data-fusion based network situation awareness(NSA)model in SWAN.This model achieves the network situation awareness through three processing levels including data perception,situation comprehension and situation prediction,and truely guarantees the"intelligent management" of SWAN controller.Next,based on the proposed NSA model,this article proposes service-oriented network performance evaluation framework based on LA-FAHP(Low-complexity Adaptive Fuzzy Analytical Hierarchy Process),which utilizes the advantages of NSA model and solves the problem that previous research didn't combine the evaluation process with specific service type.Meanwhile,this article also introduces the improved LA-FAHP algorithm to reduce the computational complexity.Subsequent simulation and results analysis also well proves the accuracy of proposed algorithm and verifies the effectiveness of proposed NSA model as well.