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Cognitive radio routing algorithms and protocol design

Author: DengShouFeng
Tutor: TangWanBin
School: University of Electronic Science and Technology
Course: Communication and Information System
Keywords: Cognitive radio Dynamic spectrum Interference limits Intermittent connection
CLC: TN92
Type: Master's thesis
Year: 2008
Downloads: 481
Quote: 2
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Abstract


Cognitive radio (Cognitive Radio, CR) technology to solve the existing spectrum resources will soon become one of the key shortage. With the rapid development of wireless communication, wireless spectrum resource problems have gradually increasingly tense stand out, how to be more efficient use of limited spectrum resources are being put on the agenda. Cognitive radio technology breakthroughs traditional spectrum allocation mechanism, from the perspective of a new use of spectrum resources, so as to improve the spectrum utilization. Cognitive radio technology has become the current field of wireless communications research focus, involving all aspects of the key technologies require in-depth studies, using cognitive radio technology in a distributed network routing protocol design will be needed to study the key techniques. This article will focus on cognitive radio environment in a distributed network routing algorithms and protocols for a more in-depth study. Through the cognitive radio environment analysis and summary presented to reflect the characteristics of cognitive radio networks and suitable for use in cognitive radio environments routing algorithms and protocols, and the corresponding performance simulation. Paper begins with a brief introduction to the concept of cognitive radio, research status and the corresponding standardization process, then the characteristics of cognitive radio networks and the corresponding potential problems were analyzed and summarized, in order to highlight the need to address the major problem, the classic Ad hoc network routing protocols and some demand cognitive radio environment have been proposed routing protocol for a summary analysis, which will clear this problem to be solved. Spectrum obtained for the dynamic analysis, cognitive interference on the primary user user restrictions and intermittent connection these questions, and depending on the model and the environment, we propose a corresponding routing algorithms and protocols. In the third chapter, we propose a spectral stability model, and on the basis of its analysis of the path to stability. Through the proposed MMIM guidelines reflect on the path to the main user system interference considerations. In the fourth chapter, the use of ON-OFF model for the primary user channel utilization model, followed by the corresponding routing metric calculation and route discovery process and other aspects of the detailed description, designed for intermittent connection problems routing protocol. Meanwhile in the respective sections, through a large number of computer simulations to verify the proposed algorithm and protocol performance.

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