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Research On Wireless Resource Management Based On Content Sharing In Network Virtualization Environment

Posted on:2019-12-11Degree:MasterType:Thesis
Country:ChinaCandidate:C Y GuoFull Text:PDF
GTID:2428330545955571Subject:Electronics and Communications Engineering
Abstract/Summary:PDF Full Text Request
With the advent of multi-device Internet of things and the vigorous development of streaming media services,the traffic of network services is on the rise.The drawbacks of the existing network architecture are highlighted.Due to the separation of services and hardware,network virtualization has become one of the most promising technologies to build the next-generation networks.In addition,content caching technology is also a good way to alleviate network traffic and improve service quality.However,in the wireless network virtualization,to carry out a reasonable and effective resource management as well as content sharing scheme remains to be further studied,and is also two aspects of this study.First of all,this paper introduces the network virtualization comprehensively,points out the research status of the current wireless virtualization,clarifies the business model under the wireless virtualization architecture,and proposes a spectrum resource allocation scheme among multiple communities in wireless virtual networks.Aiming at the unavailability of channel state information in the network,this scheme sets the type division for all service providers' demands and average channel states,provides contracts among different types of service providers and virtual mobile operators,performs spectrum resource allocation from the perspective of resource trade to make up for the existing physical layer parameter-based program defects.In order to achieve the efficient use of resources,this solution includes resource reuse design,to establish multiple subscriber pairs for service providers,improve network spectrum efficiency,and reduce service provider consumption.On the other hand,this paper studies the problem of storage allocation and content sharing in wireless virtual heterogeneous networks,and designs the storage unit allocation of small cell base station and the D2D cooperation caching scheme in the network.Based on content sharing,network service providers can provide users with a more flexible content acquisition solution,which can not only be obtained through base station cache,but also utilizing the geometric method to select and set up a D2D transmission link and benefit flow.The gain of caching and D2D communications can be the saved backhaul consumption.So this proposal can achieve saving resources and energy consumption while ensuring the service quality requirements of users.The model in this study uses contract theory,Lagrange multipliers and KKT conditions is adopted to calculate the optimal contract set.The simulation results show that the proposed scheme can ensure the interests of network participants,realize efficient resource allocation under asymmetric information,alleviate backhaul traffic,increase network throughput and improve network content sharing efficiency.Finally,the article summarizes the work,and explains the direction of future work.
Keywords/Search Tags:virtualization, resource allocation, information asymmetry, cooperative caching, contract theory
PDF Full Text Request
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