DocumentCode :
1966295
Title :
Statistical bandwidth scavenging for prioritized device coexistence
Author :
Plummer, Anthony, Jr. ; Taghizadeh, Mahmoud ; Biswas, Subir
Author_Institution :
Dept. of Electr. & Comput. Eng., Michigan State Univ., East Lansing, MI, USA
fYear :
2010
fDate :
9-11 Dec. 2010
Firstpage :
130
Lastpage :
137
Abstract :
Dynamic Spectrum Access in a Wireless LAN can enable a set of secondary users´ devices to access unused spectrum, or whitespace, which is found between the transmissions of a set of primary users´ devices. The primary design objective for an efficient secondary user access strategy is to be able to “scavenge” spatio-temporally fragmented bandwidth while limiting the amount of interference caused to the primary users. In this paper, we propose a secondary user access strategy which is based on measurement and modeling of the whitespace as perceived by the secondary users in a WLAN. A secondary user monitors and models its surrounding whitespace, and then accesses the available spectrum so that the effective secondary throughput is maximized while the resulting interference to the primary users is limited to a pre-defined bound. We first develop analytical expressions for the secondary throughput and primary interference, and then perform ns2 based simulation experiments to validate the effectiveness of the proposed access strategy, and evaluate its performance numerically using the developed expressions. The results show that the proposed access strategies are able to consistently scavenge between 90% and 96% of the available whitespace bandwidth, while keeping the primary users disruption less than 5%.
Keywords :
radiofrequency interference; spread spectrum communication; statistical analysis; wireless LAN; NS2 based simulation; WLAN; dynamic spectrum access; effective secondary throughput; interference; pre-defined bound; prioritized device coexistence; secondary user access strategy; secondary user devices; statistical bandwidth scavenging; whitespace bandwidth; whitespace modelling; wireless LAN; Bandwidth; IEEE 802.11 Standards; Protocols; Sensors; Throughput; Topology; Wireless LAN; Device Coexistence; Dynamic Bandwidth Scavenging; Secondary User Access Strategy; Whitespace Modeling;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Performance Computing and Communications Conference (IPCCC), 2010 IEEE 29th International
Conference_Location :
Albuquerque, NM
ISSN :
1097-2641
Print_ISBN :
978-1-4244-9330-2
Type :
conf
DOI :
10.1109/PCCC.2010.5682316
Filename :
5682316
Link To Document :
بازگشت