Improving spectrum handoff utilization for prioritized cognitive radio users by exploiting channel bonding with starvation mitigation
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Date
2017
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier Gmbh
Access Rights
info:eu-repo/semantics/closedAccess
Abstract
In this study, priority based non-preeinptive M/G/1 queueing model of spectrum handoff scheme is proposed in Wireless Cognitive Radio Networks. Channel bonding mechanism with starvation mitigation is employed in order to improve spectrum handoff utilization for secondary users. Since spectrum handoff offers an opportunity to secondary users for continuing their communication, it is of critical significance to determine action of primary users. In the queueing model, prioritized data traffic with aging solution to starvation is exploited to meet requirements of the secondary users. In aging mechanism; when the packet of the low priority secondary user waits in the queue more than three frame times, priority of that packet is increased. Packets of secondary users are categorized into three different priority classes, i.e., urgent, real time, and non-real time where non-real time data packets have the lowest priority while urgent data packets have the highest priority. Channel bonding mechanism is described as combining two subsequent time slots if the size of the packet is bigger than one time slot. Idle time slots for channel bonding are determined using both proactive and reactive decision based spectrum handoff schemes. Before starting spectrum handoff process with proactive scheme, first of two subsequent time slot is sensed using reactive scheme. Riverbed Modeler simulation software is utilized to simulate channel bonding and aging mechanisms. Analytical results are shown to be matched with the simulation results obtained under different load and-arrival rates. This study has also exposed that the throughput of secondary users could be increased significantly by employing aging solution to starvation, and channel bonding mechanisms. (C) 2016 Elsevier GmbH. All rights reserved.
Description
Bayrakdar, M. Enes/0000-0001-9446-0988
WOS: 000390507400024
WOS: 000390507400024
Keywords
Aging, Channel bonding, Cognitive radio networks, Priority, Spectrum handoff
Journal or Series
Aeu-International Journal Of Electronics And Communications
WoS Q Value
Q2
Scopus Q Value
Q2
Volume
71
