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Research On Routing Strategy Of Information Centric Networking Based On SDN

Posted on:2019-02-07Degree:MasterType:Thesis
Country:ChinaCandidate:Z K ZengFull Text:PDF
GTID:2428330548485052Subject:Electronic and communication engineering
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With the revolutionary evolution of the new Internet application technologies,such as cloud computing,big data,IoT,NFV etc.,this digital transformation has brought massive user's demand for resource information(such as video,social image sharing,etc.).The network applications and services have also undergone fundamental changes.The traditional Host-to-Host communication mode cannot be unable to meet the requirement of massive information in the future network.Therefore,in recent years,researchers have proposed a series of new receiver-driven architectures.ICN and SDN are two types of these architectures which are most concerned by the researchers.In ICN,with its content name based addressing and routing,content can be cached at any node in the network.According to this principle,how to find the content requested by the user quickly and effectively has become the key technology for the practical application of ICN.The advantage of SDN is that it separates the control plane from the forwarding plane and implements logical centralized control through an open programmable interface.However,the resource space and processing capability of the SDN controller are limited,and both controller and switch are in a static mapping state.When encountering large burst data streams,it is easy to cause the network turbulence or paralysis.Therefore,how to implement efficient routing of the network and increase the scalability of the controller is a difficult problem to be solved.In this paper,a new ICN intelligent routing strategy based on SDN is proposed to evaluate the path selection synthetically.A dynamic mapping mechanism between switches and controllers in ICN network is proposed to increase the scalability of controller and balance the network load.The main contributions of this paper are list as follows:(1)Under the fusion framework of SDN and ICN,we define the sub-domain community by using the complex network community division method based on the locality similarity of user interest and the features of SDN.Then we determine the physical location of the request content and generate a specific routing strategy based on the sub-domain community cache capacity importance and connection importance.In simulation,we compare it with other routing strategies,such as BC,BR,MC and NCC.The experimental results show that the proposed method has better performance in terms of hops reduction rate,content hit rate,link usage rate etc.,which verifies the effectiveness of the scheme well.(2)We proposes a new dynamic mapping mechanism to solve the problem of scalability and load imbalance of controllers in routing.Firstly,we build a complex network model and divided it into sub-domain communities,then define related parameters.Secondly,we use the Iperfmulti tool to generate random flow and use the monitor module to monitor the network load conditions.Once the controller is overloaded,we determine its dynamic mapping community according to the attractiveness of the selected high load switches and neighborhood communities,then generate a new SW-C mapping relationship.Experimental results show that the proposed strategy effectively solves the problem of controller load imbalance and dynamic migration of nodes in ICN network,and improves the overall performance of the system.
Keywords/Search Tags:Information-Centric Networking, Software-Defined Networking, sub-domain Community, Intelligent Routing, Dynamic migration
PDF Full Text Request
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