Title :
Performance Study of CSMA/CA over Spectrum Pooling Environment for Cognitive Radios
Author :
Adamis, Athanassios V. ; Constantinou, Philip
Author_Institution :
Nat. Tech. Univ. of Athens, Athens
Abstract :
Spectrum pooling and unlicensed spectrum access by cognitive radios can compensate for spectrum scarcity, caused by static licensing policies, by utilizing spectrum opportunities. In this work we modify CSMA/CA MAC protocol for operation over a spectrum pooling environment and for secondary, overlay, distributed cognitive radio networks. New performance limits and design - tradeoffs are discovered. Moreover, a new MAC protocol is proposed to improve CSMA/CA throughput over spectrum pooling. All MAC protocols are evaluated through extensive simulations.
Keywords :
carrier sense multiple access; cognitive radio; telecommunication congestion control; CSMA/CA MAC protocol; carrier sense multiple access; collision avoidance; distributed cognitive radios; spectrum pooling environment; static licensing policy; Bandwidth; Chromium; Cognitive radio; Interference; Media Access Protocol; Mobile computing; Multiaccess communication; OFDM; Physical layer; Time division multiple access;
Conference_Titel :
Wireless and Mobile Computing, Networking and Communications, 2007. WiMOB 2007. Third IEEE International Conference on
Conference_Location :
White Plains, NY
Print_ISBN :
978-0-7695-2889-2
DOI :
10.1109/WIMOB.2007.4390825
