Squeezing the Most Out of Cognitive Radio: A Joint MAC/PHY Perspective

Author

Shankar, S.N.

Author_Institution

Qualcomm Inc., San Diego, CA, USA

Volume

4

fYear

2007

fDate

15-20 April 2007

Abstract

Cognitive radios provide means to improve the spectrum utilization by allowing opportunistic usage of allocated spectrum today if they are not utilized by the primaries. We first outline that there are two types of cognitive radios (S.N. Shankar et al., 2005), namely, static and dynamic cognitive radio. Then we explain the role of physical (PHY) and medium access control (MAC) layer of the cognitive radio and outlines the interaction to perform optimal operation. We model this total interaction by means of a queueing system and analyze the performance. It was found that dynamic cognitive nodes exhibit higher statistical multiplexing gain and lower delay compared to static cognitive radio network.

Keywords

access protocols; cognitive radio; queueing theory; MAC-PHY perspective; dynamic cognitive radio; medium access control layer; physical layer; queueing system; spectrum utilization; static cognitive radio; Cognitive radio; Cross layer design; FCC; Interference; Media Access Protocol; Performance analysis; Physical layer; Space technology; Switches; TV; Cognitive Radio; Cross layer; MAC; PHY; Queueing;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech and Signal Processing, 2007. ICASSP 2007. IEEE International Conference on

Conference_Location

Honolulu, HI

ISSN

1520-6149

Print_ISBN

1-4244-0727-3

Type

conf

DOI

10.1109/ICASSP.2007.367331

Filename

4218362