Cognitive radio implementation in ISM bands with Microsoft SORA

Author

Bajaj, Jitin ; Kim, Wooseong ; Oh, Soon Y. ; Gerla, Mario

Author_Institution

Dept. of Comput. Sci., Univ. of California, Los Angeles, CA, USA

fYear

2011

fDate

11-14 Sept. 2011

Firstpage

531

Lastpage

535

Abstract

Cognitive radio network research has mostly focused on licensed spectrum sensing and empty spectrum use while protecting licensed band primary users. However, the wide deployment of WiFi access points in unlicensed bands in urban areas brings difficult challenges regarding co-existence of ad hoc mobile users with residential access points. In this paper, we propose a new mobile user protocol for dynamic channel selection via channel workload estimation. The mobile node senses channel usage in unlicensed ISM band and selects the maximum residual capacity channel for own packet transmission. The new protocol is implemented on Microsoft´s SORA software defined radio system that enables fast prototyping. We have evaluated the performance using a Campus deployed SORA testbed. Experimental results show the efficiency of our approach in avoiding external interference.

Keywords

channel capacity; channel estimation; cognitive radio; interference suppression; mobile ad hoc networks; protocols; software radio; ISM bands; Microsoft SORA software defined radio system; WiFi access point deployment; ad hoc mobile users; campus deployed SORA testbed; channel workload estimation; cognitive radio network; dynamic channel selection; external interference avoidance; licensed band primary user protection; licensed spectrum sensing; maximum residual capacity channel; mobile node; mobile user protocol; packet transmission; residential access points; Ad hoc networks; Cognitive radio; IEEE 802.11 Standards; Mobile communication; Protocols; Sensors; Cognitive radio; Software defined radio; Spectrum sensing;

fLanguage

English

Publisher

ieee

Conference_Titel

Personal Indoor and Mobile Radio Communications (PIMRC), 2011 IEEE 22nd International Symposium on

Conference_Location

Toronto, ON

ISSN

pending

Print_ISBN

978-1-4577-1346-0

Electronic_ISBN

pending

Type

conf

DOI

10.1109/PIMRC.2011.6140018

Filename

6140018