Research On Novel Heterogeneous Network Handover Process Based On SDN And MIH Technologies

Next generation mobile internet are featuring ubiquitous access utilizing different access technologies.For technical concerns,the key issue to achieve seamless networking integration is to improve the performance of vertical handover,involving innovation of vertical handover framework and optimization of vertical handover decision algorithms.However,it is challenging to address vertical handover in future dense access environment,which becomes immediate area of research focus.In this paper,a novel Cooperated Vertical Handover(CVH)framework is proposed to optimize handover performance and to reduce the handover execution time.This framework cooperates IEEE 802.21 Media Independent Handover(MIH)with Software-Defined Networking(SDN)for featuring seamless link establishment and agile network path reconfiguration.Then,a novel network handover process is designed.In the handover process,network selection is divided into two stages,the pre-filtering stage and the selection stage.The pre-filtering stage utilizes security policy-matching technique to eliminate candidates with incompatible security capabilities and inducts the selected Points of Access(PoAs)to the selection stage.In the selection stage,a multi-attribute network selection algorithm called Dynamic-VIKOR(D-VIKOR)is applied to choose optimal PoA.Compared with the original VIKOR,the D-VIKOR algorithm can reduce the time complexity through frequently evaluating dynamic attributes,but not the static attributes.Finally,the simulation results highlight that the CVH framework signficantly reduces the handover delay,execution time,etc.The work of this paper can provide a new solution for future ubiquitous access network.Through the integration of SDN and MIH technology,it promotes the seamless integration of heterogeneous networks and the intelligent decision-making of network.