DMCA
Robust Provisioning of Multicast Sessions in Cognitive Radio Networks
BibTeX
@MISC{Almasoud_robustprovisioning,
author = {Abdullah M. Almasoud and Ahmed E. Kamal},
title = {Robust Provisioning of Multicast Sessions in Cognitive Radio Networks},
year = {}
}
Share
 |
 |
 |
 |
||
OpenURL
Abstract
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 spec-trum in order to overcome the spectrum underutilization prob-lem. 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 algo-rithms 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 dis-rupt 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 num-ber of sessions that can be accommodated in the network and minimize the cost of provisioning the sessions while protecting them against failures.
Keyphrases
cognitive radio network multicast session robust provisioning multicast session protection robust multicasting single primary user interruption long term wireless network primary user algo-rithms provision multiple multicast session several group spectrum underutilization prob-lem secondary user special spectrum underutilization multicast service mode shared primary user risk group link-sharing tree fixed geographical region dynamic sharing cognitive radio spectrum utilization varies abstract today
