DocumentCode :
2914563
Title :
Performance Analysis of a Cognitive Network with Dynamic Spectrum Assignment to Secondary Users
Author :
Kannappa, Sandeep Mavuduru ; Saquib, Mohammad
Author_Institution :
Univ. of Texas at Dallas, Richardson, TX, USA
fYear :
2010
fDate :
23-27 May 2010
Firstpage :
1
Lastpage :
5
Abstract :
In a cognitive wireless network, sudden arrival of a primary user could force one or more secondary users to terminate their ongoing communication. This situation leads us to propose a cognitive wireless network which dynamically assigns service rates to the secondary users depending on the available network spectral resource. Our analysis is based on a two-dimensional Markov chain with three state variables. Performance metrics for the secondary users such as dropping probability, blocking probability and completion probability are derived. Our numerical result demonstrates that, depending on the network condition, the proposed dynamic spectrum assignment scheme is capable of reducing the dropping probability substantially and yielding higher throughput via increasing the maximum allowable service rate. Analysis of blocking probability implies that higher value of the maximum allowable service rate may or may not make the network more selective in terms of admitting new secondary users.
Keywords :
Markov processes; cognitive radio; probability; radio networks; radio spectrum management; blocking probability; cognitive network; cognitive wireless network; completion probability; dropping probability; dynamic spectrum assignment; performance analysis; performance metrics; two-dimensional Markov chain; Cognitive radio; Communications Society; Electronic mail; FCC; Frequency; Measurement; Performance analysis; Throughput; White spaces; Wireless networks;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Communications (ICC), 2010 IEEE International Conference on
Conference_Location :
Cape Town
ISSN :
1550-3607
Print_ISBN :
978-1-4244-6402-9
Type :
conf
DOI :
10.1109/ICC.2010.5502743
Filename :
5502743
Link To Document :
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