A Survey on MAC Strategies for Cognitive Radio Networks

被引：250
|
作者：
De Domenico, Antonio [1 ,2 ]
Strinati, Emilio Calvanese [1 ]
Di Benedetto, Maria-Gabriella [3 ]
机构：
[1] CEA LETI Labs MINATEC, F-38000 Grenoble, France
[2] Grenoble Informat Lab, F-38000 Grenoble, France
[3] Univ Roma La Sapienza, Dept Info Com, I-00184 Rome, Italy
来源：
IEEE COMMUNICATIONS SURVEYS AND TUTORIALS | 2012年 / 14卷 / 01期
关键词：
Cognitive radio; Medium Access Control; Spectrum Sensing; Spectrum Sharing; Spectrum Mobility; AD HOC NETWORKS; SPECTRUM ACCESS; PROTOCOL; FRAMEWORK; CROSS;
D O I：
10.1109/SURV.2011.111510.00108
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
Dynamic spectrum policies combined with software defined radio are powerful means to improve the overall spectral efficiency allowing the development of new wireless services and technologies. Medium Access Control (MAC) protocols exploit sensing stimuli to build up a spectrum opportunity map (cognitive sensing). Available resources are scheduled (dynamic spectrum allocation), improving coexistence between users that belong to heterogeneous systems (dynamic spectrum sharing). Furthermore, MAC protocols may allow cognitive users to vacate selected channels when their quality becomes unacceptable (dynamic spectrum mobility). The contribution of this survey is threefold. First, we show the fundamental role of the MAC layer and identify its functionalities in a cognitive radio (CR) network. Second, a classification of cognitive MAC protocols is proposed. Third, advantages, drawbacks, and further design challenges of cognitive MAC protocols are discussed.
引用
收藏
页码：21 / 44
页数：24
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