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Displaying 1-34 out of 34 total
Guest Editors' Introduction: Special Issue on Cyber-Physical Systems (CPS)
Found in: IEEE Transactions on Parallel and Distributed Systems
By Symeon Papavassiliou,Nei Kato,Yunhao Liu,Cheng-Zhong Xu,Xinbing Wang
Issue Date:September 2012
pp. 1569-1571
The nineteen papers in this special issue focus on the development and applications of cyber-physical systems. These systems refer to the tight link between computational, virtual, and physical resources that drive the potential of having a pervasive effec...
 
Understanding and Evaluating the Impact of Sampling on Anomaly Detection Techniques
Found in: MILCOM
By Georgios Androulidakis, Vasilis Chatzigiannakis, Symeon Papavassiliou, Mary Grammatikou, Vasilis Maglaris
Issue Date:October 2006
pp. 1-7
In this paper, the emphasis is placed on the evaluation of the impact of various packet sampling techniques that have been proposed in the PSAMP IETF draft, on two widely used anomaly detection approaches. More specifically, we evaluate the behavior of a s...
 
A Spatio-Stochastic Framework for Cross-Layer Design in Cognitive Radio Networks
Found in: IEEE Transactions on Parallel and Distributed Systems
By Evangelos Anifantis,Vasileios Karyotis,Symeon Papavassiliou
Issue Date:November 2014
pp. 2762-2771
In this paper, we address the problem of distributed resource management for secondary users in Cognitive Radio Networks (CRNs), through a topology aware and frequency agile cross-layer approach. We exploit the theory of spatial processes and propose a Mar...
 
A Cloud-Oriented Content Delivery Network Paradigm: Modeling and Assessment
Found in: IEEE Transactions on Dependable and Secure Computing
By Chrysa Papagianni,Aris Leivadeas,Symeon Papavassiliou
Issue Date:September 2013
pp. 287-300
Cloud-oriented content delivery networks (CCDNs) constitute a promising alternative to traditional content delivery networks. Exploiting the advantages and principles of the cloud, such as the pay as you go business model and geographical dispersion of res...
 
Efficient Resource Mapping Framework over Networked Clouds via Iterated Local Search-Based Request Partitioning
Found in: IEEE Transactions on Parallel and Distributed Systems
By Aris Leivadeas,Chrysa Papagianni,Symeon Papavassiliou
Issue Date:June 2013
pp. 1077-1086
The cloud represents a computing paradigm where shared configurable resources are provided as a service over the Internet. Adding intra- or intercloud communication resources to the resource mix leads to a networked cloud computing environment. Following t...
 
A Markov Random Field framework for channel assignment in Cognitive Radio networks
Found in: Pervasive Computing and Communications Workshops, IEEE International Conference on
By Evangelos Anifantis,Vasileios Karyotis,Symeon Papavassiliou
Issue Date:March 2012
pp. 770-775
In order to alleviate the absence of hierarchical coordination among secondary users of Cognitive Radio networks and to enable fast and efficient reconfiguration of pervasive ad hoc networks, spatially localized and frequency agile mechanisms are required ...
 
An Architecture for Virtual Network Embedding in Wireless Systems
Found in: Network Cloud Computing and Applications, International Symposium on
By Aris Leivadeas,Chrysa Papagianni,Evripidis Paraskevas,Georgios Androulidakis,Symeon Papavassiliou
Issue Date:November 2011
pp. 62-68
The cloud represents a computing paradigm where scalable virtualized resources are provided ``as a service'' over the Internet. Mobile/wireless clouds of seamlessly integrated wireless networks is the latest technology trend. Moving the ``Test bed as a Ser...
 
Topology Enhancements in Wireless Multihop Networks: A Top-Down Approach
Found in: IEEE Transactions on Parallel and Distributed Systems
By Eleni Stai,Vasileios Karyotis,Symeon Papavassiliou
Issue Date:July 2012
pp. 1344-1357
Contemporary traffic demands call for efficient infrastructures capable of sustaining increasing volumes of social communications. In this work, we focus on improving the properties of wireless multihop networks with social features through network evoluti...
 
Secrecy Capacity for Satellite Networks under Rain Fading
Found in: IEEE Transactions on Dependable and Secure Computing
By Dionysia K. Petraki, Markos P. Anastasopoulos, Symeon Papavassiliou
Issue Date:September 2011
pp. 777-782
The transmission of confidential information over satellite links operating at frequencies above 10 GHz is studied in this paper. The major factor impairing the link performance at these frequencies is rain attenuation, a physical phenomenon exhibiting bot...
 
On the Tradeoff between MAC-Layer and Network-Layer Topology-Controlled Malware Spreading Schemes in Ad Hoc and Sensor Networks
Found in: Emerging Security Information, Systems, and Technologies, The International Conference on
By Vasileios Karyotis, Anastasios Kakalis, Symeon Papavassiliou
Issue Date:June 2009
pp. 255-261
Significant interest has been raised recently in wireless networks in modeling and dealing effectively with different types of attacks. In this paper, emphasis is placed on the attacker's perspective and based on a probabilistic framework we study intellig...
 
On the Asymptotic Behavior of Malware-Propagative Mobile Ad Hoc Networks
Found in: IEEE International Conference on Mobile Adhoc and Sensor Systems Conference
By Vasileios Karyotis, Mary Grammatikou, Symeon Papavassiliou
Issue Date:October 2007
pp. 1-9
In this paper we study the spreading of malicious software over ad hoc networks, where legitimate nodes are prone to propagate the infections they receive from an attacker or their already infected neighbors. Considering the Susceptible-Infected-Susceptibl...
 
Sensor Network Grids: Agent Environments Combined with QoS in Wireless Sensor Networks
Found in: Autonomic and Autonomous Systems, International Conference on
By Kostas Stathis, Stella Kafetzoglou, Symeon Papavassiliou, Stefano Bromuri
Issue Date:June 2007
pp. 47
We present a distributed systems architecture that uses Grid computing to combine basic nodes of wireless sensor networks with complex sensor nodes of wired networks. Three kinds of complex sensor nodes are identified: objects, agents and containers. The d...
 
Adaptive Localized QoS-Constrained Data Aggregation and Processing in Distributed Sensor Networks
Found in: IEEE Transactions on Parallel and Distributed Systems
By Jin Zhu, Symeon Papavassiliou, Jie Yang
Issue Date:September 2006
pp. 923-933
<p><b>Abstract</b>—In this paper, an efficient Quality of Service (QoS)-constrained data aggregation and processing approach for distributed wireless sensor networks is investigated and analyzed. One of the key features of the proposed ap...
 
On the Characterization and Evaluation of Mobile Attack Strategies in Wireless Ad Hoc Networks
Found in: Computers and Communications, IEEE Symposium on
By Vasileios Karyotis, Symeon Papavassiliou, Mary Grammatikou, Basil Maglaris
Issue Date:June 2006
pp. 29-34
The spread of active attacks has become a frequent cause of vast systems breakdown in modern communication networks. In this paper, we first present a probabilistic modeling framework for the propagation of an energy-constrained mobile threat in a wireless...
 
An Efficient QoS-Constrained Data Aggregation and Processing Approach in Distributed Wireless Sensor Networks
Found in: Computers and Communications, IEEE Symposium on
By Jin Zhu, Symeon Papavassiliou, Stella Kafetzoglou, Jie Yang
Issue Date:June 2006
pp. 257-262
In this paper an efficient Quality of Service (QoS)- constrained data aggregation and processing approach for distributed wireless sensor networks is introduced and evaluated. The objective of the proposed approach is to aggregate data on the fly at interm...
 
On the Modeling of Data Aggregation and Report Delivery in QoS-constrained Sensor Networks
Found in: Pervasive Computing and Communications Workshops, IEEE International Conference on
By Jin Zhu, Symeon Papavassiliou, Stella Kafetzoglou, Jie Yang
Issue Date:March 2006
pp. 347-351
In this paper the problem of efficient data aggregation and report delivery in QoS-constrained distributed sensor networks is investigated. An analytical statistical model is introduced, to represent the data aggregation and report delivery process in sens...
 
A New Differentiated Service Model Paradigm via Explicit Endpoint Admission Control
Found in: Computers and Communications, IEEE Symposium on
By Jie Yang, Jian Ye, Symeon Papavassiliou
Issue Date:July 2003
pp. 299
In this paper we propose a scalable differentiated service model paradigm to provide fine QoS granularity in Internet via the framework of a distributed admission control scheme referred to as Explicit Endpoint Admission Control (EEAC). Specifically, in th...
 
Dynamic Fair Bandwidth Allocation in Multiservice CDMA Networks
Found in: Distributed Computing Systems Workshops, International Conference on
By Chengzhou Li, Symeon Papavassiliou
Issue Date:May 2003
pp. 850
In this paper we study the fundamental problem of allocating with efficiency and fairness the available resources in a CDMA wireless system that supports multi-rate multimedia services. We propose the Channel Adaptive Rate Scheduling (CARS) algorithm which...
 
Integration of Advanced Reservation and Bandwidth Reconfiguration Based Admission Control in Wireless Networks with Multimedia Services
Found in: Distributed Computing Systems Workshops, International Conference on
By Jian Ye, Jiongkuan Hou, Symeon Papavassiliou
Issue Date:May 2003
pp. 844
In this paper we propose an integrated bandwidth management and call admission control scheme applicable in wireless networks that support multiple services with different QoS requirements. The proposed scheme is achieved via i) the integration of a positi...
 
A Comprehensive Resource Management Framework for Next Generation Wireless Networks
Found in: IEEE Transactions on Mobile Computing
By Jian Ye, Jiongkuan Hou, Symeon Papavassiliou
Issue Date:October 2002
pp. 249-264
<p><b>Abstract</b>—In this paper, we propose an integrated resource management approach that can be implemented in next generation wireless networks that support multimedia services (data, voice, video, etc.). Specifically, we combine the...
 
A Framework for the Evaluation of Geomulticast Delivery Accuracy in Mobile Ad-Hoc Networks
Found in: Mobility and Wireless Access Workshop, International
By Beongku An, Symeon Papavassiliou
Issue Date:October 2002
pp. 72
Abstroct-Geomulticast is a specialized location-dependent multicasting technique, where messages are multicast to some specific user groups within a specific zone. In this paper we first present an overall architecture that can be used to support the deliv...
 
Integration of Pricing with Call Admission Control to Meet QoS Requirements in Cellular Networks
Found in: IEEE Transactions on Parallel and Distributed Systems
By Jiongkuan Hou, Jie Yang, Symeon Papavassiliou
Issue Date:September 2002
pp. 898-910
<p><b>Abstract</b>—Call Admission Control (CAC) plays a significant role in providing the desired Quality of Service (QoS) in cellular networks. Traditional CAC schemes that mainly focus on the tradeoff between new call blocking probabili...
 
End-to-End Quality of Service in Multi-Class Service High-Speed Networks via Optimal Least Weight Routing
Found in: Computers and Communications, IEEE Symposium on
By Jun Jiang, Symeon Papavassiliou
Issue Date:July 2002
pp. 449
In this paper, we propose the use of Optimal Least Weight Routing (OLWR) Algorithm for routing QoS flows in high-speed networks. The main principle of our algorithm is that the choice of the most appropriate route, is based on a set of parameters that esti...
 
Influence-Based Channel Reservation Scheme for Mobile Cellular Networks
Found in: Computers and Communications, IEEE Symposium on
By Jiongkuan Hou, Symeon Papavassiliou
Issue Date:July 2001
pp. 0218
Abstract: Channel reservation techniques have been extensively used in cellular networks in order to meet the Quality of Service (QoS) requirements. In this paper an influence-based channel reservation and call admission control scheme is proposed to provi...
 
Integration of Mobile Agents and Genetic Algorithms for Efficient Dynamic Network Resource Allocation
Found in: Computers and Communications, IEEE Symposium on
By Symeon Papavassiliou, Jian Ye, Antonio Puliafito, Orazio Tomarchio
Issue Date:July 2001
pp. 0456
Abstract: In this paper an agent based approach is investigated to build a framework where resource allocation is provided under the control of different and often competing stakeholders (users, network providers, service providers, etc.). This paper also ...
 
Performance Analysis of CDMA Random Access Systems with Heavy-Tailed Packet Length Distribution
Found in: Computers and Communications, IEEE Symposium on
By Sebnem Z. Ozer, Symeon Papavassiliou, Ali N. Akansu
Issue Date:July 2001
pp. 0597
Abstract: This paper analyzes the performance of unslotted CDMA random access schemes with heavy-tailed packet length distribution. Most of the previous work cover the analysis of the system with Poisson process and for infinite population and infinite buf...
 
Network and Service Anomaly Detection in Multi-Service Transaction-Based Electronic Commerce Wide Area Networks
Found in: Computers and Communications, IEEE Symposium on
By Lawerence Ho, Symeon Papavassiliou
Issue Date:July 2000
pp. 291
Proactive detection of network failures and performance degradations is a key to rapid fault recovery and thus robust networking. In this paper, we present methodologies and algorithms that we developed in order to enhance the proactive and adaptive detect...
 
Decentralized Power Control Algorithms for Multi-Service CDMA-Based Cellular Systems
Found in: Computers and Communications, IEEE Symposium on
By G.V. Kotsakis, P.P. Demestichas, Symeon Papavassiliou
Issue Date:July 2000
pp. 700
In the paper we present two decentralized Iterative Power Control Algorithms (IPCAs) for the uplink and downlink communication in multi-service CDMA wireless environments in order to expand the system capacity while at the same time satisfy the various QoS...
 
On the Performance of a Scalable Single-Tier Position Based Routing Protocol for Mobile Ad-Hoc Wireless Networks
Found in: Computers and Communications, IEEE Symposium on
By Sheng Xu, Symeon Papavassiliou, Konstantinos Amouris
Issue Date:July 2000
pp. 575
This paper deals with the performance evaluation of a scalable single-tier routing protocol designed for operation in mobile ad hoc networking environments. The protocol under consideration is based on the superposition of link-state and position-based rou...
 
Strategies for Dynamic Management of the QoS of Mobile Users in Wireless Networks through Software Agents
Found in: Computers and Communications, IEEE Symposium on
By Jian Ye, Symeon Papavassiliou, Giuseppe Anastasi, Antonio Puliafito
Issue Date:July 2002
pp. 369
In this paper we propose an integrated solution for QoS management in mobile wireless networksthat can be dynamically adapted to user requir ements and resource availability . Due to the strong variability of the environment under exam, we propose to use m...
 
A class of backpressure algorithms for networks embedded in hyperbolic space with controllable delay-throughput trade-off
Found in: Proceedings of the 15th ACM international conference on Modeling, analysis and simulation of wireless and mobile systems (MSWiM '12)
By Eleni Stai, John S. Baras, Symeon Papavassiliou
Issue Date:October 2012
pp. 15-22
Future communications consist of an increasing number of wireless parts, while simultaneously need to support the widespread multimedia applications imposed by social networks. These human-machine systems, driven by both real time social interactions and t...
     
A unified approach for efficient network selection in multi-service integrated CDMA/WLAN systems
Found in: Proceedings of the 2009 International Conference on Wireless Communications and Mobile Computing: Connecting the World Wirelessly (IWCMC '09)
By Georgios Aristomenopoulos, Symeon Papavassiliou, Timotheos Kastrinogiannis
Issue Date:June 2009
pp. 5-6
In this paper the problem of proficient users' network assignment in integrated CDMA/WLAN systems is addressed and a decentralized utility-based Network Selection algorithm aiming at optimizing user's and system's performance while satisfying multiple serv...
     
A utility-based power allocation non-cooperative game for the uplink in multi-service CDMA wireless networks
Found in: Proceedings of the 2009 International Conference on Wireless Communications and Mobile Computing: Connecting the World Wirelessly (IWCMC '09)
By Eirini Eleni Tsiropoulou, Symeon Papavassiliou, Timotheos Kastrinogiannis
Issue Date:June 2009
pp. 5-6
In this paper we address the problem of efficient power allocation in the uplink of CDMA wireless networks supporting simultaneously both real-time and non-real-time services with various and often diverse Quality of Service (QoS) prerequisites. Each mobil...
     
On the malware spreading over non-propagative wireless ad hoc networks: the attacker's perspective
Found in: Proceedings of the 3rd ACM workshop on QoS and security for wireless and mobile networks (Q2SWinet '07)
By Symeon Papavassiliou
Issue Date:October 2007
pp. 156-159
In this paper, we adopt a probabilistic framework for malware spreading and propose a closed queueing network model that is able to describe analytically the aggregated behavior of an ad hoc network attacked by multiple malicious nodes. In our framework, t...
     
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