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Displaying 1-14 out of 14 total
Exploring Service and Buffer Management Issues to Provide Integrated Voice and Data Services in Single and Multi-channel Wireless Networks
Found in: 2013 IEEE 27th International Conference on Advanced Information Networking and Applications (AINA)
By Eser Gemikonakli,Glenford Mapp,Orhan Gemikonakli,Enver Ever
Issue Date:March 2013
pp. 1056-1063
Service and Buffer Management techniques can be used to ensure Quality of Service (QoS) for different traffic flows according to some specific policies. In this study, a single buffer queuing system is considered to model single and multi-channel, homogene...
 
Enhancing the Modelling of Vertical Handover in Integrated Cellular/WLAN Environments
Found in: 2013 IEEE 27th International Conference on Advanced Information Networking and Applications (AINA)
By Yonal Kirsal,Enver Ever,Glenford Mapp,Orhan Gemikonakli
Issue Date:March 2013
pp. 924-930
This paper presents a new analytical model to enhance the modelling of vertical handover for integrated cellular/WLAN systems. The WLAN system considered is within the coverage area of cellular network, hence users can have a downward vertical handover to ...
 
Effects of IDSs on the WSNs Lifetime: Evidence of the Need of New Approaches
Found in: 2012 IEEE 11th International Conference on Trust, Security and Privacy in Computing and Communications (TrustCom)
By Krishna Doddapaneni,Enver Ever,Orhan Gemikonakli,Leonardo Mostarda,Alfredo Navarra
Issue Date:June 2012
pp. 907-912
A Wireless Sensor Network (WSN) consists of spatially distributed autonomous sensors that monitor environmental data such as temperature, humidity, light, speed and sound. WSNs pose new security challenges because of their unattended nature and limited res...
 
Path Loss Effect on Energy Consumption in a WSN
Found in: Computer Modeling and Simulation, International Conference on
By Krishna Doddapaneni,Enver Ever,Orhan Gemikonakli,Ivano Malavolta,Leonardo Mostarda,Henry Muccini
Issue Date:March 2012
pp. 569-574
Energy consumption of nodes is a crucial factor that constrains the networks life time for Wireless Sensor Networks (WSNs). WSNs are composed of small sensors equipped with low-power devices, and have limited battery power supply. The main concern in exist...
 
Impacts of Buffering of Voice Calls in Integrated Voice and Data Services
Found in: Computer Modeling and Simulation, International Conference on
By Eser Gemikonakli, Orhan Gemikonakli, Enver Ever, Glenford Mapp
Issue Date:April 2011
pp. 507-512
In this study, we aim to analyse the relationship between various characteristics of a communication system with data and voice call requests. Queuing theory and Markov chain analysis are effectively used for this purpose. Such a study is useful for unders...
 
Implementation of Non-Pipelined and Pipelined Data Encryption Standard (DES) Using Xilinx Virtex-6 FPGA Technology
Found in: Computer and Information Technology, International Conference on
By Saeid Taherkhani, Enver Ever, Orhan Gemikonakli
Issue Date:July 2010
pp. 1257-1262
Data encryption process can easily be quite complicated and usually requires significant computation time and power despite significant simplifications. This paper discusses about pipelined and non-pipelined implementation of one of the most commonly used ...
 
Performability Modelling of Handoff in Wireless Cellular Networks and the Exact Solution of System Models with Service Rates Dependent on Numbers of Originating and Handoff Calls
Found in: Computational Intelligence, Modelling and Simulation, International Conference on
By Enver Ever, Yonal Kirsal, Orhan Gemikonakli
Issue Date:September 2009
pp. 282-287
Mobility is one of the major issues in the performance characterization of wireless communication systems. Various approaches exist in the literature for performance evaluation of mobile systems, especially the handoff phenomenon. However, since the probab...
 
A Hardware Accelerated Semi Analytic Approach for Fault Trees with Repairable Components
Found in: Computer Modeling and Simulation, International Conference on
By Chakib Kara-Zaitri, Enver Ever
Issue Date:March 2009
pp. 146-151
Fault tree analysis of complex systems with repairable components can easily be quite complicated and usually requires significant computer time and power despite significant simplifications. Invariably, software-based solutions, particularly those involvi...
 
Analytical Modelling of Large Scale Multi-Server Systems with Deferred Repairs: A Reward Rate Approach
Found in: Computer Modeling and Simulation, UKSIM European Symposium on
By Altan Kocyigit, Orhan Gemikonakli, Enver Ever
Issue Date:September 2008
pp. 447-452
Fault-tolerant systems with repair-upon-failure strategy can become expensive in terms of labour and time. Postponing non essential repairs can reduce these costs. Of course, while postponing these repairs, it is essential to keep the whole system capable ...
 
Cost Reduction in High Power Computing Using a Deferred Repair Strategy: A Simulation Study
Found in: Computer Modeling and Simulation, International Conference on
By Altan Koçyigit, Orhan Gemikonakli, Enver Ever
Issue Date:April 2008
pp. 354-359
Fault-tolerant systems with repair-upon-failure strategy can become expensive in terms of labour and time. Especially for homogeneous multi-server systems, if no control hierarchy exists, postponing non essential repairs can reduce these costs without affe...
 
A Mathematical Model for Performability of Beowulf Clusters
Found in: Simulation Symposium, Annual
By Enver Ever, Orhan Gemikonakli, Ram Chakka
Issue Date:April 2006
pp. 118-126
Beowulf clusters have become very popular as an alternative to supercomputers world-wide. However, the most pressing issues of today?s cluster solutions is the need for high availability and performance. Such systems, clearly, are prone to break-downs. Eve...
 
On Demand Multicast Routing in Wireless Sensor Networks
Found in: 2014 28th International Conference on Advanced Information Networking and Applications Workshops (WAINA)
By Clifford Sule,Purav Shah,Krishna Doddapaneni,Orhan Gemikonakli,Enver Ever
Issue Date:May 2014
pp. 233-238
The wireless networking environment presents imposing challenges to the study of broadcasting and multicasting problems. Developing an algorithm to optimize communication amongst a group of spatially distributed sensor nodes in a WSN (Wireless Sensor Netwo...
 
Deployment Challenges and Developments in Wireless Sensor Networks Clustering
Found in: 2014 28th International Conference on Advanced Information Networking and Applications Workshops (WAINA)
By Krishna Doddapaneni,Fredrick A. Omondi,Enver Ever,Purav Shah,Orhan Gemikonakli,Roberto Gagliardi
Issue Date:May 2014
pp. 227-232
Clustering techniques for wireless sensor networks (WSNs) have been extensively studied and proven to improve the network lifetime, a primary metric, used for performance evaluation of sensor networks. Although introduction of clustering techniques has the...
 
Performance Modelling of Virtualized Servers
Found in: Computer Modeling and Simulation, International Conference on
By Orhan Gemikonakli, Enver Ever, Eser Gemikonakli
Issue Date:March 2010
pp. 434-438
The increase on the demand of IT resources diverted enterprises to the use of costly physical servers. However, besides cooling and power cost, most of the times, physical servers are poorly utilized. Server virtualization is a way of better utilizing such...
 
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