Novel scheme for interference avoidance in cognitive radio based cellular networks

被引：0
|
作者：
WANG SaiXU XiaodongCHEN XinTAO XiaofengWANG Qiang Wireless Technology Innovation InstituteKey Laboratory of Universal Wireless CommunicationMinistry of Education Beijing University of Posts and TelecommunicationsBeijing China [100876 ]
机构：
来源：
The Journal of China Universities of Posts and Telecommunications | 2012年 / 19卷 / 01期
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中图分类号：
TN925 [无线电中继通信、微波通信];
学科分类号：
摘要：
The cognitive radio (CR) technology is believed to improve the spectrum efficiency.However,the interference problem has become a critical issue due to the coexistence of primary systems and CR systems.In this paper,the interferences in CR based cellular networks are discussed.Interference scenarios are analyzed,considering different interference sources.Meanwhile,an improved model named 'Cognitive Interference Ring' is introduced to describe the interference range of each secondary user (SU).Depending on the above analysis,graph coloring based dynamic power allocation (GCDPA) scheme is proposed for interference avoidance.Simulation results demonstrate that in CR based cellular networks,the interferences to primary users (PUs) can be effectively mitigated with the proposed GCDPA scheme,and the system throughput and power efficiency are both improved.
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页码：69 / 76
页数：8
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