KNOWS: Cognitive Radio Networks Over White Spaces

Author

Yuan, Yuan ; Bahl, Paramvir ; Chandra, Ranveer ; Chou, Philip A. ; Ferrell, John Ian ; Moscibroda, Thomas ; Narlanka, Srihari ; Wu, Yunnan

Author_Institution

Microsoft Res., Redmond

fYear

2007

fDate

17-20 April 2007

Firstpage

416

Lastpage

427

Abstract

FCC has proposed to allow unlicensed operations in the TV broadcast bands. This portion of the spectrum has several desirable properties for more robust data communication as compared to the ISM bands. However, there are a number of challenges in efficiently using the TV bands. For example, the available spectrum is fragmented, and its availability may vary over time. In this paper, we present a cognitive radio system, called KNOWS, to address these challenges. We present the design of our prototype, which includes a new hardware platform and a spectrum-aware Medium Access Control (MAC) protocol. We have implemented the MAC protocol in QualNet, and our results show that in most scenarios KNOWS increases the throughput by more than 200% when compared to an IEEE 802.11 based system.

Keywords

access protocols; data communication; radio networks; television broadcasting; FCC; Federal Communications Commission; IEEE 802.11; KNOWS; MAC protocol; TV broadcast bands; cognitive radio networks; hardware platform; robust data communication; spectrum-aware medium access control; Access protocols; Cognitive radio; Data communication; FCC; Hardware; Media Access Protocol; Prototypes; Robustness; TV broadcasting; White spaces;

fLanguage

English

Publisher

ieee

Conference_Titel

New Frontiers in Dynamic Spectrum Access Networks, 2007. DySPAN 2007. 2nd IEEE International Symposium on

Conference_Location

Dublin

Print_ISBN

1-4244-0663-3

Type

conf

DOI

10.1109/DYSPAN.2007.61

Filename

4221523