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University of Thessaly
(24 results)-
Whitepapers
Reputation-Based Internet Sharing in Wireless Neighborhood Community Networks
February 6, 2010, 12:00am PST
This paper proposes easily applicable distributed reputation-based policies to motivate users of a wireless community to share their Internet connection in a p2p fashion. The goal is the provision...
Provided by University of Thessaly
-
Whitepapers
Dynamic Cooperation Enforcement Through Trust-Based Allocation Policies in P2P Systems
February 21, 2008, 12:00am PST
In this paper, the authors propose distributed trust-based resource allocation policies to provide fairness in p2p-like systems. According to these policies, the portion of the available resource...
Provided by University of Thessaly
-
Whitepapers
A Trust-Based Exchange Framework for Multiple Services in P2P Systems
June 18, 2007, 12:00am PDT
In this paper, the authors propose fully distributed trust-based policies for p2p systems to regulate the exchange of different type of services and discourage mis-behaviour. In a system of peers...
Provided by University of Thessaly
-
White Papers
M-Learning and M-Commerce in Pervasive Environments
October 15, 2009, 12:00am PDT
During the past decade, Mobile Learning (m-learning) and Pervasive Learning (p-learning) are attracting increasing worldwide, due to a number of technical and societal reasons. The emergence of...
Provided by University of Thessaly
-
White Papers
Design and Deployment Considerations for High Performance MIMO Testbeds
November 19, 2008, 12:00am PST
MIMO (Multiple Input Multiple Output) enabled systems are characterized by higher reliability and transmission rates, as compared to conventional SISO (Single Input Single Output) systems....
Provided by University of Thessaly
-
Whitepapers
Low Complexity Algorithm for Inter-Layer Prediction of H.264/SVC
May 1, 2012, 12:00am PDT
Inter-layer prediction of H.264/SVC can help to improve the coding efficiency with increased computation complexity. This paper presents a low complexity algorithm for inter-layer prediction. The...
Provided by University of Thessaly
-
White Papers
A Software Framework for Alleviating the Effects of MAC-Aware Jamming Attacks in Wireless Access Networks
July 9, 2011, 12:00am PDT
The IEEE 802.11 protocol inherently provides the same long-term through-put to all the clients associated with a given Access Point (AP). In this paper, the authors first identify a clever,...
Provided by University of Thessaly
-
White Papers
Quantifying the Overhead Due to Routing Probes in Multi-Rate WMNs
December 21, 2009, 12:00am PST
The selection of high-throughput routes is a key element towards improving the performance of wireless multihop networks. While several routing metrics have been proposed in the literature, it has...
Provided by University of Thessaly
-
White Papers
Routing-Aware Channel Selection in Multi-Radio Mesh Networks
March 12, 2009, 12:00am PDT
Efficient channel selection is essential in 802.11 mesh deployments, for minimizing contention and interference among co-channel devices and thereby supporting a plurality of QoS-sensitive...
Provided by University of Thessaly
-
White Papers
LAC: Load-Aware Channel Selection in 802.11 WLANs
September 18, 2008, 12:00am PDT
Dense deployments of hybrid WLANs result in high levels of interference and low end-user throughput. Many frequency allocation mechanisms for WLANs have been proposed by a large body of previous...
Provided by University of Thessaly
-
White Papers
Optimal Control of Sleep Periods for Wireless Terminals
May 10, 2011, 12:00am PDT
The authors consider a mobile connected to a base station, saving energy by shutting off its transceiver, and they try to answer the fundamental question: what is the optimal sleep policy?...
Provided by University of Thessaly
-
White Papers
Measurement Aggregation and Routing Techniques for Energy-Efficient Estimation in Wireless Sensor Networks
July 7, 2010, 12:00am PDT
Wireless sensor networks are fundamentally different from other wireless networks due to energy constraints and spatial correlation among sensor measurements. Mechanisms that efficiently compress...
Provided by University of Thessaly
-
White Papers
An Iterative Opinion Aggregation Algorithm for Reputation System Voting Schemes in MANETs and Peer-2-Peer Networks
June 15, 2007, 12:00am PDT
Distributed systems and open networks gain more attention everyday, offering possibilities so far unattainable with classic networking technologies. Their main strength, openness and absence of...
Provided by University of Thessaly
-
White Papers
New Channel Allocation Techniques for Power Efficient WiFi Networks
June 15, 2010, 12:00am PDT
Energy efficiency becomes evergreen than ever before. Over the last few years a significant research in wireless communications, aiming to enhance communications efficiency subject to constraint...
Provided by University of Thessaly
-
White Papers
Experimenting With P2P Traffic Optimization for Wireless Mesh Networks in a Federated OMF-PlanetLab Environment
October 5, 2010, 12:00am PDT
The ultimate success of the Wireless Mesh Network paradigm (WMN) in large scale deployments depends on the ability to test it in real world scenarios. A typical application scenario which is worth...
Provided by University of Thessaly
-
White Papers
Interconnection of Geographically Distributed Wireless Mesh Testbeds: Resource Sharing on a Large Scale
January 21, 2011, 12:00am PST
Creating large scale testbeds for evaluating wireless mesh technologies and protocols, and for testing their ability to support real world applications in realistic environments, is a crucial step...
Provided by University of Thessaly
-
White Papers
A Demonstration of a Management Tool for Assessing Channel Quality Information in Wireless Testbeds
March 26, 2010, 12:00am PDT
The gradually growing need for testbed use so as networking algorithms to be validated in real environment, has given rise to optimal utilization of testbed resources. Towards this direction, the...
Provided by University of Thessaly
-
White Papers
A Framework and Experimental Study for Discrimination of Collision and Channel Errors in Wireless LANs
March 3, 2011, 12:00am PST
A fundamental unresolved problem in wireless networks is that of distinguishing packet errors that are caused by deteriorated link conditions and noise, from errors that occur due to packet...
Provided by University of Thessaly
-
White Papers
Community Building Over Neighbourhood Wireless Mesh Networks
January 21, 2008, 12:00am PST
The Fourth Generation (4G) network paradigm has long been sought. A user-centric vision for such "Always best connected" next-generation 4G networks is neighborhood Wireless Mesh Networks (WMNs)....
Provided by University of Thessaly
-
White Papers
Improving the Performance of Styx Based Services Over High Latency Links
April 1, 2011, 12:00am PDT
Today, latency is the main limiting factor for distributed systems over the Internet. WANs and wireless networks have achieved high throughput, but limitations on the speed of light put a strict...
Provided by University of Thessaly
-
White Papers
Wireless Video Transmission With Over-the-Air Packet Mixing
March 25, 2012, 12:00am PDT
In this paper, the authors propose a system for wireless video transmission with a wireless PHYsical layer (PHY) that supports cooperative forwarding of interfered/superimposed packets. Their...
Provided by University of Thessaly
-
White Papers
Competition and Regulation in Wireless Services Markets
December 16, 2011, 12:00am PST
Consider a city where 3 commercial operators (companies) and one municipal operator offer WiFi Internet access to the citizens (users). The companies charge for their services and offer better...
Provided by University of Thessaly
-
White Papers
Ncrawl: Network Coding for Rate Adaptive Wireless Links
April 4, 2011, 12:00am PDT
Intersession Network Coding (NC) can provide significant performance benefits via mixing packets at wireless routers; these benefits are especially pronounced when NC is applied in conjunction...
Provided by University of Thessaly
-
Whitepapers
An Experimental Framework for Channel Sensing Through USRP/GNU Radios
March 31, 2012, 12:00am PDT
In the last decade testbeds have been setup to evaluate network protocols and algorithms under realistic settings. In order to draw solid conclusions about the corresponding experimental results,...
Provided by University of Thessaly
-
Whitepapers
Low Complexity Algorithm for Inter-Layer Prediction of H.264/SVC
May 1, 2012, 12:00am PDT
Inter-layer prediction of H.264/SVC can help to improve the coding efficiency with increased computation complexity. This paper presents a low complexity algorithm for inter-layer prediction. The...
Provided by University of Thessaly
-
Whitepapers
A Trust-Based Exchange Framework for Multiple Services in P2P Systems
June 18, 2007, 12:00am PDT
In this paper, the authors propose fully distributed trust-based policies for p2p systems to regulate the exchange of different type of services and discourage mis-behaviour. In a system of peers...
Provided by University of Thessaly
-
Whitepapers
Dynamic Cooperation Enforcement Through Trust-Based Allocation Policies in P2P Systems
February 21, 2008, 12:00am PST
In this paper, the authors propose distributed trust-based resource allocation policies to provide fairness in p2p-like systems. According to these policies, the portion of the available resource...
Provided by University of Thessaly
-
Whitepapers
Reputation-Based Internet Sharing in Wireless Neighborhood Community Networks
February 6, 2010, 12:00am PST
This paper proposes easily applicable distributed reputation-based policies to motivate users of a wireless community to share their Internet connection in a p2p fashion. The goal is the provision...
Provided by University of Thessaly
-
Whitepapers
An Experimental Framework for Channel Sensing Through USRP/GNU Radios
March 31, 2012, 12:00am PDT
In the last decade testbeds have been setup to evaluate network protocols and algorithms under realistic settings. In order to draw solid conclusions about the corresponding experimental results,...
Provided by University of Thessaly
-
White Papers
Ncrawl: Network Coding for Rate Adaptive Wireless Links
April 4, 2011, 12:00am PDT
Intersession Network Coding (NC) can provide significant performance benefits via mixing packets at wireless routers; these benefits are especially pronounced when NC is applied in conjunction...
Provided by University of Thessaly
-
White Papers
Competition and Regulation in Wireless Services Markets
December 16, 2011, 12:00am PST
Consider a city where 3 commercial operators (companies) and one municipal operator offer WiFi Internet access to the citizens (users). The companies charge for their services and offer better...
Provided by University of Thessaly
-
White Papers
Wireless Video Transmission With Over-the-Air Packet Mixing
March 25, 2012, 12:00am PDT
In this paper, the authors propose a system for wireless video transmission with a wireless PHYsical layer (PHY) that supports cooperative forwarding of interfered/superimposed packets. Their...
Provided by University of Thessaly
-
White Papers
Improving the Performance of Styx Based Services Over High Latency Links
April 1, 2011, 12:00am PDT
Today, latency is the main limiting factor for distributed systems over the Internet. WANs and wireless networks have achieved high throughput, but limitations on the speed of light put a strict...
Provided by University of Thessaly
-
White Papers
Community Building Over Neighbourhood Wireless Mesh Networks
January 21, 2008, 12:00am PST
The Fourth Generation (4G) network paradigm has long been sought. A user-centric vision for such "Always best connected" next-generation 4G networks is neighborhood Wireless Mesh Networks (WMNs)....
Provided by University of Thessaly
-
White Papers
A Framework and Experimental Study for Discrimination of Collision and Channel Errors in Wireless LANs
March 3, 2011, 12:00am PST
A fundamental unresolved problem in wireless networks is that of distinguishing packet errors that are caused by deteriorated link conditions and noise, from errors that occur due to packet...
Provided by University of Thessaly
-
White Papers
A Demonstration of a Management Tool for Assessing Channel Quality Information in Wireless Testbeds
March 26, 2010, 12:00am PDT
The gradually growing need for testbed use so as networking algorithms to be validated in real environment, has given rise to optimal utilization of testbed resources. Towards this direction, the...
Provided by University of Thessaly
-
White Papers
Interconnection of Geographically Distributed Wireless Mesh Testbeds: Resource Sharing on a Large Scale
January 21, 2011, 12:00am PST
Creating large scale testbeds for evaluating wireless mesh technologies and protocols, and for testing their ability to support real world applications in realistic environments, is a crucial step...
Provided by University of Thessaly
-
White Papers
Experimenting With P2P Traffic Optimization for Wireless Mesh Networks in a Federated OMF-PlanetLab Environment
October 5, 2010, 12:00am PDT
The ultimate success of the Wireless Mesh Network paradigm (WMN) in large scale deployments depends on the ability to test it in real world scenarios. A typical application scenario which is worth...
Provided by University of Thessaly
-
White Papers
New Channel Allocation Techniques for Power Efficient WiFi Networks
June 15, 2010, 12:00am PDT
Energy efficiency becomes evergreen than ever before. Over the last few years a significant research in wireless communications, aiming to enhance communications efficiency subject to constraint...
Provided by University of Thessaly
-
White Papers
An Iterative Opinion Aggregation Algorithm for Reputation System Voting Schemes in MANETs and Peer-2-Peer Networks
June 15, 2007, 12:00am PDT
Distributed systems and open networks gain more attention everyday, offering possibilities so far unattainable with classic networking technologies. Their main strength, openness and absence of...
Provided by University of Thessaly
-
White Papers
Measurement Aggregation and Routing Techniques for Energy-Efficient Estimation in Wireless Sensor Networks
July 7, 2010, 12:00am PDT
Wireless sensor networks are fundamentally different from other wireless networks due to energy constraints and spatial correlation among sensor measurements. Mechanisms that efficiently compress...
Provided by University of Thessaly
-
White Papers
Optimal Control of Sleep Periods for Wireless Terminals
May 10, 2011, 12:00am PDT
The authors consider a mobile connected to a base station, saving energy by shutting off its transceiver, and they try to answer the fundamental question: what is the optimal sleep policy?...
Provided by University of Thessaly
-
White Papers
LAC: Load-Aware Channel Selection in 802.11 WLANs
September 18, 2008, 12:00am PDT
Dense deployments of hybrid WLANs result in high levels of interference and low end-user throughput. Many frequency allocation mechanisms for WLANs have been proposed by a large body of previous...
Provided by University of Thessaly
-
White Papers
Routing-Aware Channel Selection in Multi-Radio Mesh Networks
March 12, 2009, 12:00am PDT
Efficient channel selection is essential in 802.11 mesh deployments, for minimizing contention and interference among co-channel devices and thereby supporting a plurality of QoS-sensitive...
Provided by University of Thessaly
-
White Papers
Quantifying the Overhead Due to Routing Probes in Multi-Rate WMNs
December 21, 2009, 12:00am PST
The selection of high-throughput routes is a key element towards improving the performance of wireless multihop networks. While several routing metrics have been proposed in the literature, it has...
Provided by University of Thessaly
-
White Papers
A Software Framework for Alleviating the Effects of MAC-Aware Jamming Attacks in Wireless Access Networks
July 9, 2011, 12:00am PDT
The IEEE 802.11 protocol inherently provides the same long-term through-put to all the clients associated with a given Access Point (AP). In this paper, the authors first identify a clever,...
Provided by University of Thessaly
-
White Papers
Design and Deployment Considerations for High Performance MIMO Testbeds
November 19, 2008, 12:00am PST
MIMO (Multiple Input Multiple Output) enabled systems are characterized by higher reliability and transmission rates, as compared to conventional SISO (Single Input Single Output) systems....
Provided by University of Thessaly
-
White Papers
M-Learning and M-Commerce in Pervasive Environments
October 15, 2009, 12:00am PDT
During the past decade, Mobile Learning (m-learning) and Pervasive Learning (p-learning) are attracting increasing worldwide, due to a number of technical and societal reasons. The emergence of...
Provided by University of Thessaly
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