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Cognitive radio spectrum allocation algorithm

Author: GeYang
Tutor: ShaoShiXiang
School: Nanjing University of Posts and Telecommunications
Course: Communication and Information System
Keywords: Cognitive radio Spectrum allocation Graph coloring Tagging mechanism Fairness
CLC: TN925
Type: Master's thesis
Year: 2011
Downloads: 60
Quote: 0
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Abstract


With the development of wireless communication , on the growing demand for spectrum resources , traditional spectrum allocation has been a great challenge , spectrum utilization is low. Cognitive radio technology is considered the best solution to solve this problem . Dynamic spectrum allocation technique which is one of key technologies . The purpose of spectrum allocation is a reasonable choice and use of \Thesis, cognitive radio system spectrum allocation models and algorithms. Paper first describes the concept of cognitive radio , research status , key technologies , as well as cognitive radio spectrum allocation algorithm is the basic principles and models . Then , the paper 's third and fourth in the next chapter delves into the model based on graph coloring and color -sensitive list of coloring coloring spectrum allocation algorithm . Papers by list-based coloring (List-Coloring) the performance of the three classical algorithm research and simulation, and the scope of application summary. Subsequently, the paper studies and compares the color-sensitive coloring (CSGC) the basic principles and MSB, MMB, MPF criterion algorithm description, and tags mechanisms . On this basis , we propose a proportional fairness based spectrum allocation algorithm , in the traditional label mechanism based on the increased number of channels adjustment factor , for some nodes always played a dominant inhibitory effect , will share channel opportunities for more nodes. Simulation results show that , compared with the color-sensitive coloring algorithm , this algorithm gains in both the total bandwidth , while ensuring users get better service cognitive capacity and bandwidth gains fairness . Finally, the parallel combination of allocation algorithm , effectively reducing the communication overhead.

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