DocumentCode :
248706
Title :
Robust provisioning of multicast sessions in cognitive radio networks
Author :
Almasoud, Abdullah M. ; Kamal, Ahmed E.
Author_Institution :
Dept. of Electr. & Comput. Eng., Iowa State Univ., Ames, IA, USA
fYear :
2014
fDate :
4-8 Aug. 2014
Firstpage :
417
Lastpage :
422
Abstract :
Today´s wireless networks use fixed spectrum over long term and fixed geographical regions. However, spectrum utilization varies by time and location, which leads to temporal and special spectrum underutilization. Cognitive radio is an emerging technology that enables dynamic sharing of the spectrum in order to overcome the spectrum underutilization problem. In this paper, we consider the problem of supporting the multicast service mode in cognitive radio networks. Moreover, we are concerned with supporting this mode of service such that it is robust in the face of failures. We develop two algorithms which provide robust multicasting in such networks. Our proposed algorithms are: 1) multicast sessions protection with link-sharing trees and 2) multicast sessions protection using rings. These algorithms provision multiple multicast sessions, and protect them against a single primary user interruption at a time. They also take into account that the activities of a primary user may disrupt communication in several groups, of secondary users, which are referred to as Shared Primary User Risk Group (SPURG). The objective of the proposed algorithms is to increase the number of sessions that can be accommodated in the network and minimize the cost of provisioning the sessions while protecting them against failures.
Keywords :
cognitive radio; multicast communication; trees (mathematics); SPURG; cognitive radio networks; link-sharing trees; multicast service mode; multicast sessions protection; robust multicasting; robust provisioning; shared primary user risk group; Approximation algorithms; Cognitive radio; Complexity theory; Interrupters; Multicast communication; Robustness; cognitive radio; multicast; protection; resilience;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Wireless Communications and Mobile Computing Conference (IWCMC), 2014 International
Conference_Location :
Nicosia
Print_ISBN :
978-1-4799-7324-8
Type :
conf
DOI :
10.1109/IWCMC.2014.6906393
Filename :
6906393
Link To Document :
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