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

fYear

2007

fDate

8-10 Oct. 2007

Firstpage

31

Lastpage

31

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/WIMOB.2007.4390825

Filename

4390825