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Dynamic spectrum sharing wireless communications system spectrum switching and scheduling algorithm

Author: LiTao
Tutor: TangWanBin
School: University of Electronic Science and Technology
Course: Communication and Information System
Keywords: Dynamic spectrum sharing of resources Cognitive radio Spectrum switching Dispatch
CLC: TN925
Type: Master's thesis
Year: 2011
Downloads: 97
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Abstract


Dynamic spectrum sharing of resources (Dynamic Spectrum Sharing, DSS) has become one of the key technologies that significantly improve spectrum utilization. Dynamic spectrum sharing technology to break through the traditional spectrum allocation mechanism from a new point of view to use spectrum resources, so as to arrive solve the spectrum shortage purpose. Cognitive radio (Cognitive Radio, CR) is considered an important technical means to achieve dynamic spectrum sharing has become a research focus within the current field of wireless communications, the key technologies involved in-depth research. Idle spectrum is dynamic spectrum sharing technology research and application facing two major problems with the space-time changes in the characteristics and different business QOS (Quality of Service, QoS) requirements, dynamic spectrum management is to solve these problems The core technology. A more in-depth study of this thesis will be switching algorithm for dynamic spectrum environment spectrum and wireless scheduling algorithm. Through the analysis and summary of the dynamic spectrum environment, proactive spectrum handoff algorithm can be applied to the dynamic spectrum sharing systems, scheduling algorithms and performance simulation analysis. Firstly, concept development background, and the spectrum of the dynamic spectrum sharing system switching technology, radio resource scheduling algorithm research status, significance briefly introduced. The spectrum switching study faced challenges in the second chapter of the dynamic spectrum sharing system made a more detailed discussion, comparison and switching strategy with traditional spectrum, dynamic spectrum sharing system spectrum switching key technologies and performance evaluation . Next, from the existing study concluded two very different spectrum switching strategy: reactive spectrum switching strategy and active the spectrum switching strategy and compared. After that is done at home and abroad scheduling algorithms for dynamic spectrum sharing system overview. In the third chapter, the thesis is based on a per-channel state represented by the dynamic spectrum sharing system model design based prediction of active spectrum handoff algorithm, the simulation results show that compared to the reactive spectrum handoff algorithm, the new algorithm performance will be significantly improved. And then describes the realization of dynamic spectrum sharing system simulation platform on a network simulation tool OPNET, and based on the performance requirements of the system, using the platform to achieve the optimization of the spectrum access strategy. In the fourth chapter, the paper discusses the dynamic spectrum sharing system scheduling algorithm spectrum switching strategy, and design a way to apply to the dynamic spectrum sharing system scheduling algorithm, the simulation results show that even when the interruption The algorithm can also be provided for all non-authorized user QoS guarantee, which can be better used in the realization of the dynamic spectrum sharing system.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Wireless communications > Radio relay communications,microwave communications
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