Pubs:conference

<bibtex> @inproceedings { type={inproceedings }, cite={266}, title={Assuring Performance in E-Commerce Section}, booktitle={IEE 16th UK Teletraffic Symposium}, number={29/1-29/7}, year={2000}, publisher={N/A}, organization={N/A}, abstract={Performance Assurance is a methodology that, when applied during the design and development cycle, will}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={265}, title={Why Worry about Performance in e-commerce Solutions}, booktitle={IEE 16th UK Teletraffic Symposium}, year={2000}, publisher={E-Commerce Performance}, organization={E-Commerce Performance}, abstract={This paper will discuss the evolution of computer systems, and will show that while the system performance is}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={270}, title={A New Dynamic Web Server}, booktitle={8th International Conference on Telecommunication}, year={2001}, publisher={Performance Engineering Lab}, organization={Performance Engineering Lab}, abstract={The growth of traffic on the Internet and the}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={272}, title={A Client-Oriented Dynamic Web Server}, booktitle={IEE 17th UK Teletraffic Symposium}, year={2001}, publisher={N/A}, organization={N/A}, abstract={The cost of computer systems has decreased continuously in recent years, leading to an exponential}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={466}, title={Adaptive Anti-Jitter Mechanism for Multi-Party Conferencing in a H.323 Multi Point Control Unit}, booktitle={IEI/IEE Symposium on Tlecommunications System Research}, year={2001}, abstract={In this paper we propose a mechanism that can support multi-party conferencing. The main objective of}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={269}, title={New Methods for Performance Monitoring of J2EE Applications Servers}, booktitle={IEEE 8th International Conference on Telecommunications}, year={2001}, publisher={Performance Engineering Lab}, organization={Performance Engineering Lab}, abstract={There is a growing need for high performance enterprise}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={267}, title={Performance Monitoring of JAVA Component-Oriented Distributed Applications}, booktitle={IEEE 9th International Conference on Software,Telecommunication & Computer Networks}, year={2001}, publisher={Performance Engineering Lab}, organization={Performance Engineering Lab}, abstract={We present a framework for monitoring the performance of component oriented}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={271}, title={Resource Allocation for Interactive traffic classes over GPRS Network}, booktitle={IEE 17th UK Teletraffic Symposium}, year={2001}, publisher={Performance Engineering Lab}, organization={Performance Engineering Lab}, abstract={The General Packet Radio Service (GPRS) is a new bearer service for GSM that greatly simplify wireless access to}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={268}, title={The Influence of Web Page Images on the Performance of Web Servers}, booktitle={International Confrence on Networking}, year={2001}, publisher={Performance Engineering Lab}, organization={Performance Engineering Lab}, abstract={In recent years World Wide Web traffic has shown phenomenal}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={276}, title={A Framework for Performace Monitoring,Modelling & Prediction of Component Oriented Distributed Systems}, booktitle={ACM 3rd International Workshop on Software and Performance }, year={2002}, publisher={Performance Engineering Lab}, organization={Performance Engineering Lab}, abstract={We present a framework that can be used to identify performance issues in component-oriented distributed systems. The framework consists of a monitoring module, a modelling module and a prediction module, that are interrelated. The monitoring block extracts real-time performance data from a live or under development system. The modelling block generates UML models of the system showing where the performance problems are located and drives the monitoring process. The performance prediction block simulates different system-loads on the generated models and pinpoints possible performance issues. The technological focus is currently on Enterprise Java Beans systems.}, keywords={Component Oriented}, author={Mos,A. and Murphy,J.}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={279}, title={Algorithms for Resource Allocation in Data Transfer over EGPRS Network}, booktitle={2nd European Conference on Universal Multiservice Networks}, year={2002}, publisher={Performance Engineering Lab}, organization={Performance Engineering Lab}, abstract={Mobile telephone systems are undergoing a substantial}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={412}, title={A Framework for Optical Deployment Scheme in Component-based Systems}, booktitle={10th Conference on Software,Telecommunications & Computer Networks}, year={2002}, abstract={Lately, multimedia-related Internet applications}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={437}, title={An Adaptive Mechanism for Pre-recorded Multimedia Streaming Based on Traffic Conditions}, booktitle={11th W3C WWW Conference}, year={2002}, abstract={The multimedia streams transmissions, done over the existing "best-effort" networks, are continuously increasing in}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={274}, title={Framework for predicting the performance of Component based Systems}, booktitle={IEEE 10th International Conference on Software,Telecommunications and Computer Networks}, year={2002}, publisher={Performance Engineering Lab}, organization={Performance Engineering Lab}, abstract={The performance of component-based systems, especially of e-commerce applications, becomes a key factor in keeping business relations active. Middleware performance offered by technologies such as EJB, .NET, CORBA does not guarantee the fulfilment of performance requirements. We propose a framework that automatically builds an analytical model and drives possible performance improvements of the system under study. We outline a methodology of discovering transactions within the system at run-time.}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={277}, title={Novel Prioritised EGPRS Medium Access Regime For Reduced File Transfer Delay During Congested Periods}, booktitle={IEE 3G 2002;Third International Conference on 3G Mobile Communications Technologies}, year={2002}, abstract={The goal of this paper is to investigate the efficiency of}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={275}, title={Performance Management in Component-Oriented Systems using a Model Driven Architecture Approach}, booktitle={IEEE 6th International Enterprise Distributed Object Computing Conference}, year={2002}, publisher={Performance Engineering Lab}, organization={Performance Engineering Lab}, abstract={Developers often lack the time or knowledge to profoundly understand the performance issues in large-scale component-oriented enterprise applications. This situation is further complicated by the fact that such applications are often built using a mix of in-house and Commercial-Off-The-Shelf (COTS) components.}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={273}, title={Transaction Distribution Algorithms with user Classes for Distributed Application Performance Optimisation}, booktitle={IEEE 10th International Conference on Software,Telecommunications and Computer Networks}, year={2002}, publisher={Performance Engineering Lab}, organization={Performance Engineering Lab}, abstract={There is a growing need for high performance}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={278}, title={Understanding Performance Issues in Component-Oriented Distributed Applications:The COMPAS Framework}, booktitle={7th International Workshop on Component-Oriented Programming of the 16th European Conference on Object Oriented Programming}, year={2002}, publisher={Performance Engineering Lab}, organization={Performance Engineering Lab}, abstract={Large enterprise applications such as financial systems are increasingly making use of Commercial-Off-The-Shelf (COTS) components in order to reduce development costs and increase productivity. Developers of such applications use productivity frameworks and component-oriented middleware such as EJB or .NET that help the development effort by providing run-time environments with support for a wide range of system-level services such as transactions and load-balancing. Due to the inherent complexity of such environments, it is often difficult to model and predict the performance of the resulting application, particularly when COTS components are used. We propose a framework that uses three interrelated modules to help developers understand and predict performance problems in component-oriented applications. The monitoring module extracts performance data in real-time from a running application. The modelling module generates UML models based on performance measurements from the monitoring module. Finally, the performance prediction module simulates the generated models for different workloads, helping developers understand the consequences of changes in user behaviour or changes in application design.}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={281}, title={A Modified SCTP Handover Scheme for Real Time Traffic}, booktitle={First International Working Conference on Performance Modelling and Evaluation of Heterogenous Networks}, year={2003}, publisher={Performance Engineering Lab}, organization={Performance Engineering Lab}, abstract={A new transport protocol, SCTP, offers the possibility of enabling}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={282}, title={A Self Optimizing Container Design for Enterprise Java Beans Applications}, booktitle={8th International Workshop on Component Oriented Programming}, year={2003}, publisher={Performance Engineering Lab}, organization={Performance Engineering Lab}, abstract={Contextual component frameworks, such as Enterprise Java Beans (EJB), facilitate the development of easily evolvable and modifiable enterprise applications. Support for dynamic re-composition, such as instance-level contextual composition and runtime binding are the base upon which such features are offered. Applications can be built out of third-party components and deployed on third-party platforms. At the same time, this black box nature of third-party components and platforms diminishes the effectiveness of traditional performance analysis methods. This raises the role played by runtime optimizations in addressing performance issues of such systems.}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={284}, title={A Framework for Using Component Redundancy for Self Optimising & Self Healing Component Based Systems}, booktitle={International Conference on Software Engineering}, year={2003}, publisher={Performance Engineering Lab}, organization={Performance Engineering Lab}, abstract={The ever-increasing complexity of software systems}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={361}, title={An Integrated NTP-RTCP Solution to Audio Skwe Detection & Compensation for VoIP Applications}, booktitle={International Conference on Multimedia & Expo}, year={2003}, publisher={Performance Engineering Lab}, organization={Performance Engineering Lab}, abstract={The circuit switched POTS (Plain Old Telephone System) preserves}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={365}, title={An Adaptive MPEG-4 Streaming System based on Object Prioritisation}, booktitle={IEI/IEEE Symposium on Telecommunications System Research}, year={2003}, publisher={Performance Engineering Lab}, organization={Performance Engineering Lab}, abstract={Streaming of video and multimedia content has}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={280}, title={BER Performance in Wavelength Packet Switched WDM systems during Nano-Second Wavelength switching Events}, booktitle={29th European Conference on Optical Communications}, year={2003}, publisher={Intune Technologies Ltd}, organization={Intune Technologies Ltd}, abstract={The BER performance of a WDM channel is investigated as a function of the attenuation of another WDM signal during fast wavelength switching events. A nano-second tuneable laser is switched across the monitored channel to perform the study.}, keywords={Wavelength}, author={Dantcha,A. and Barry,L. and Murphy J. and Dunne,J. and Mullane,T. and Mcdonald,D.}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={283}, title={Novel GPRS Simulator for Testing MAC Protocols}, booktitle={IEE 4th International Conference on 3G Mobile Communication Technologies}, year={2003}, publisher={Performance Engineering Lab}, organization={Performance Engineering Lab}, abstract={A simple, effective model of a GPRS/GSM cell is}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={288}, title={An Analysis of Delay of Small IP Packets in Celluar Data Networks}, booktitle={IEE 5th International Conference on 3G Mobile Communication Technologies}, year={2004}, publisher={Performance Engineering Lab}, organization={Performance Engineering Lab}, abstract={The delay characteristics of small IP packets in cellular data}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={290}, title={A Statistical Analysis of IP Packet Delay and Jitter in Cellular Networks}, booktitle={IEEE 15th International Symposium on Personal,Indoor & Mobile Radio Communications}, year={2004}, publisher={Performance Engineering Lab}, organization={Performance Engineering Lab}, abstract={A novel methodology is proposed for the}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={291}, title={Adaptive Dynamic Bandwidth Allocation Algorithm for Ethernet PONs}, booktitle={30th European Conference on Optical Communications,ECOS 2004}, number={740-741}, year={2004}, publisher={Performance Engineering Lab}, organization={Performance Engineering Lab}, abstract={We present an Adaptive Dynamic Bandwidth Allocation algorithm for Passive Optical Networks. We}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={292}, title={A Novel Service Level Agreement Based Algorithm for Diffrentiated Services enabled Ethernet PONs}, booktitle={9th Opto Electronics & Communications Conference & 3rd International Conference on Optical Internet}, year={2004}, publisher={Performance Engineering Lab}, organization={Performance Engineering Lab}, abstract={We present a Dynamic Bandwidth Allocation}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={294}, title={A Framework for automatically Detecting & Assesing Performance Antipatterns in Component Based Systems using Run -Time Analysis}, booktitle={9th International Workshop on Component Oriented Programming(WCOP) & 18th European Conference on Object Oriented Programming(ECOOP)}, year={2004}, publisher={Performance Engineering Lab}, organization={Performance Engineering Lab}, abstract={We propose a framework for automatically detecting and}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={295}, title={Automatic Performance Management in Component Based Software Systems}, booktitle={IEEE International Conference on Autonomic Computing}, year={2004}, publisher={Performance Engineering Lab}, organization={Performance Engineering Lab}, abstract={A framework for automatic performance tuning of}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={298}, title={A Framework for Automatic Performance Monitoring,Analysis & Optimisation of Component based Software Systems }, booktitle={2nd ICSE Workshop on Remote Analysis and Measurement of Software Systems(RAMSS 04),26th International Conference on Software Engineering(ICSE 2004)}, year={2004}, publisher={Performance Engineering Lab}, organization={Performance Engineering Lab}, abstract={A framework for automating the runtime performance management of component-based software systems is presented. The framework leverages static performance information obtained at component development time, if available, and executes performance monitoring, analysis and optimisation operations during runtime. The dynamic performance optimisation process is based on the automatic selection and activation of one of multiple functionally-equivalent implementation variants, available at runtime, each one optimised for a different running context. The framework consists of three main modules: monitoring & diagnosis, evaluation & decision and component activation. Current implementation work targets Enterprise JavaBeans systems.}, keywords={Component Oriented`}, author={Diaconescu,A. and Murphy,J.}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={286}, title={Bandwidth Allocation For Service Level Agreement Aware Ethernet Passive Optical Networks}, booktitle={IEEE Globecom 2004}, year={2004}, publisher={Performance Engineering Lab}, organization={Performance Engineering Lab}, abstract={Passive Optical Networks (PON) are thought to}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={293}, title={Bandwidth Scheduling Techniques For Diffrentiated Services Support in Ethernet Passive Optical Networks}, booktitle={4th International Symposium on Communication Systems,Networks & Digital Signal Processing}, year={2004}, publisher={Performance Engineering Lab}, organization={Performance Engineering Lab}, abstract={Passive Optical Networks are thought to be}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={287}, title={Client Controlled Network Selection}, booktitle={IEE 5th International Conference on 3G Mobile Communication Technologies(3G 2004)}, year={2004}, publisher={Performance Engineering Lab}, organization={Performance Engineering Lab}, abstract={It is likely that an ensemble of overlapping heterogeneous}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={299}, title={COMPAS:Adaptive Performance Monitoring of Component Based Systems}, booktitle={2nd ICSE Workshop on Remote Analysis and Measurement of Software Systems(RAMSS 04),26th International Conference on Software Engineering(ICSE 2004)}, year={2004}, publisher={Performance Engineering Lab}, organization={Performance Engineering Lab}, abstract={A performance monitoring framework for adaptive instrumentation and diagnosis is presented. Instrumentation is performed by low-overhead monitoring probes which are automatically activated and deactivated based on runtime conditions. Both a collaborative distributed model and a centralised model for assisting the diagnosis and adaptation processes are presented. The framework targets component-based systems in general and J2EE in particular.}, keywords={Component Oriented`}, author={Mos,A. and Murphy,J.}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={423}, title={Content-Based Adaptation of Streamed Multimedia}, booktitle={7th IFIP/IEEE international Conference on Management of Multimedia Networks & Services}, year={2004}, abstract={Most adaptive delivery mechanisms for streaming multimedia content}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={450}, title={Delay-Centric Handover in SCTP over WLAN}, booktitle={Trans. on Automatic Control & Control Science}, year={2004}, abstract={In the field of personal mobile}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={464}, title={Evaluating the Impact of Network Performance on Video Streaming Quality for Categorised Video Content}, booktitle={14th International Packet Video Workshop}, year={2004}, abstract={This paper describes an empirical study that}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={422}, title={Issues in Developing a Simulation Model of an EJB Application Server}, booktitle={Computer Measurement Group 2004 International Conference}, year={2004}, abstract={Despite the fact that EJB (Enterprise Java Beans) is such a widely used}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={289}, title={Novel Admission Control Algorithm for GPRS/EGPRS Based on Fuzzy Logic}, booktitle={IEE 5th International Conference on 3G Mobile Communication Technologies}, year={2004}, publisher={Performance Engineering Lab}, organization={Performance Engineering Lab}, abstract={As users in a GPRS/EGPRS network have different Quality}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={424}, title={Performance Assesment of the Quality-Oriented Adaptation Scheme}, booktitle={7th IFIP/IEEE International Conference on Management of Multimedia Networks & Services}, year={2004}, abstract={This paper focuses on the experimental performance assessment of}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={296}, title={Simulation of Multimedia Traffic over SCTP Modified for Delay-Centric Handover}, booktitle={5th World Wireless Congress(B3G)}, year={2004}, publisher={Performance Engineering Lab}, organization={Performance Engineering Lab}, abstract={The mobile wireless environment can be challenging for multimedia applications, with poor}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={297}, title={Using Runtime Information for Adapting Enterprise Java Beans Application Servers}, booktitle={2nd Internatioanl Workshop on Dynamic Analysis(WODA)}, number={52-59}, year={2004}, publisher={Performance Engineering Lab}, organization={Performance Engineering Lab}, abstract={Modern component-based technologies, such as}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={301}, title={Automating the Performance Management of Component-Based Enterprise Systems through the use of Redundancy}, booktitle={IEEE/ACM International Conference on Automated Software Engineering(ASE-2005)}, year={2005}, publisher={Performance Engineering Lab}, organization={Performance Engineering Lab}, abstract={Component technologies are increasingly being used for building}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={303}, title={A Low Complexity Algorithm for Statistically Based Estimation of Average IP Packet Delay in Cellular Data Networks}, booktitle={International Teletraffic Congress,ITC-19}, year={2005}, publisher={Performance Engineering Lab}, organization={Performance Engineering Lab}, abstract={A new, low computation complexity technique for prediction of the average delay of IP packets, transported}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={307}, title={A Statistical Estimation of Average IP Packet Delay in Cellular Data Networks}, booktitle={IEEE Wireless Communication & Network Conference}, year={2005}, publisher={University College Dublin}, organization={University College Dublin}, abstract={A novel technique for estimating the average delay}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={306}, title={Cost-based burst dropping strategy in Optical Burst Switching Networks}, booktitle={IEEE 7th International Conference on Transport Optical Networks}, year={2005}, publisher={Performance Engineering Lab}, organization={Performance Engineering Lab}, abstract={Optical Burst Switching (OBS) is a new paradigm for future all-optical networks. Intentional burst dropping is}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={309}, title={Cost-based Wavelength Allocation Algorithms in Optical Burst Switching Networks}, booktitle={APOC 2004,SPIE,Optical Transmission,Switching & Subsystems II,LNCS}, year={2005}, publisher={Performance Engineering Lab}, organization={Performance Engineering Lab}, abstract={Optical Burst Switching(OBS) is a new paradigm for future all optical networks.It has been noted that performance of an OBS nodedepends on the wavelength algorithms called cost based algorithms.We note that bursts compete for more type of resources than wavelength alone.For example if a given burst is to be allocated successfully,a Fiber Delay Line (FDL) or a wavelength convertor may have to be used.It can be expected however that the set of available resources will be limited.If at a given time all the convertors are used,then any arriving burst will have to be allocated on the same wavelength-if it is available.Similarly the unavailablity of FDLs will decrease the probablity of burst being accepted.In a cost-based algorithm,each resource is assigned a metric(or price).Channels arepriced according to their suitablity for a particular burst.When a control packet arrives at a core node,all the possible ways of handling the corresponding burst are found(the outgoing channel,with or without a FDL or wavelength converter),and the one with the lowest metric is chosen.To show how the performance of a cost-based algorithm compares to other algorithm we present the result of our simulations for a node with full conversion capablity and a shared FDL.}, keywords={Wavelength}, author={Klusek,B. and Murphy,J. and Perry,P.}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={389}, title={Method Input Parameters & Performances of EJB Applications}, year={2005}, abstract={We investigated the impact of method input parameters on component performance, which is usually}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={438}, title={Middleware Support for Data-Flow Distribution in Web-Services Composition}, booktitle={European Conference on Object-Oriented Programming}, year={2005}, abstract={Composition ofWeb services helps to lower the time-to-market}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={304}, title={Network Selection Decision in Wireless Heterogenous Networks}, booktitle={IEEE 16th International Symposium on Personal.Indoor & Mobile Radio Communications}, year={2005}, publisher={Performance Engineering Lab}, organization={Performance Engineering Lab}, abstract={In future wireless and mobile environments it is}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={434}, title={Network Selection Strategy in Heterogenous Wireless Networks}, booktitle={IT&T Conference }, year={2005}, abstract={Next generation communications will offer a wide range of services}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={302}, title={Performance Modelling of a Distributed Approach to Interference Mitigation in License-Exempt IEEE 802.16 Systems}, booktitle={IEEE International Symposium on New Frontiers in Dynamic Spectrum Access Networks(DySPAN 2005)}, year={2005}, publisher={University College Dublin}, organization={University College Dublin}, abstract={In this paper, three approaches to modelling a}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={305}, title={Supporting Flexible Network Operator Policies in EGPRS Through Admission Control}, booktitle={IFIP 10th International Conference on Personal Wireless Communications}, year={2005}, publisher={University College Dublin}, organization={University College Dublin}, abstract={Many of the admission control strategies for cellular data networks proposed in}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={161}, title={A Survey of Seamless Handover in Heterogeneous Radio Access Networks}, booktitle={ACM/IEEE International Symposium on Modeling, Analysis and Simulation of Wireless and Mobile Systems}, year={2006}, month={10/2006}, publisher={ACM/IEEE}, organization={ACM/IEEE}, abstract={This paper provides a detailed discussion of the problem of Seamless Handover in Heterogeneous Radio Access Networks. Several approaches to providing a handover solution have been proposed, some of which will be described and compared, in order to indicate possible directions for continuing to search for a seamless handover solution. Various problems are present in the existing solutions, and are discussed in this paper.}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={170}, title={Seamless Handover in Heterogeneous Radio Access Networks}, booktitle={IT&T}, year={2006}, month={10/2006}, abstract={This paper provides a detailed discussion of the problem of Seamless Handover in Heterogeneous Radio Access Networks. Brief descriptions of several wireless access technologies are included to provide some background information and to illustrate the importance of solving the seamless handover problem for network subscribers. Several approaches to providing a handover solution have been proposed, some of which will be described and compared, in order to indicate possible directions for continuing to search for a seamless handover solution. Various problems are present in the existing solutions, and are discussed in this paper. These problems are significant enough to warrant further investigation in the handover area, and leave scope for modifications and improvements.}, keywords={Seamless Handover, Heterogenous Networks, SCTP}, author={C. Thorpe and S. Murphy and L. Murphy}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={213}, title={An Approach to Transport Layer Handover of VoIP over WLAN}, booktitle={CCNC}, year={2006}, month={January 2006}, abstract={In this paper a transport layer handover mechanism for}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={311}, title={A Relative Delay Minimization Scheme for Multiplayer Gaming in Diffrentiated Services Network}, booktitle={ACM SIGCOMM Workshop on Network & System Support for Games}, year={2006}, publisher={PEL}, organization={PEL}, abstract={Multiplayer gaming over the Internet continues to grow in}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={439}, title={A Priority Based Adaptive Scheme for Wireless Multimedia Delivery}, booktitle={IEEE International Conference on Multimedia & Expo(ICME)}, year={2006}, publisher={Performance Engineering Lab}, organization={Performance Engineering Lab}, abstract={In wireless multimedia streaming, there is a need to allow}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={313}, title={Delivery of On-Demand Video Services in Rural Areas via IEEE 802.16 Broadband Wireless Access Networks}, booktitle={ACM 2nd Workshop on Wireless Multimedia Networking & Performance Modelling }, year={2006}, publisher={Performance Engineering Lab}, organization={Performance Engineering Lab}, abstract={A simulation study of delivery of streaming video on-demand via}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={318}, title={Delivering Quality of Service for Gaming Applications in Best Effort Networks}, booktitle={13th International Conference on Telecommunications}, year={2006}, publisher={Irish Research Council}, organization={Irish Research Council}, abstract={This paper describes a scheduler which provides}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={312}, title={End-point Synchronisation & Handover For Multi-homed Services}, booktitle={IEE Proceedings-Communications}, year={2006}, publisher={PEL}, organization={PEL}, abstract={It is proposed to implement a synchronised routing table at the transport layer, referred to as an}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={314}, title={Evaluation of an Intelligent Utility-Based Strategy for Dynamic Wireless Network Selection}, booktitle={Autonomic Management of Mobile Multimedia Services}, year={2006}, publisher={Performance Engineering Lab}, organization={Performance Engineering Lab}, abstract={In the case of next generation wireless networks, different users with}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={320}, title={Economic Model for Cost Effective Network Selection Strategy in Service Oriented Heterogenous Wireless Network Environment}, booktitle={10th IEEE/IFIP Network Operations & Management Symposium}, year={2006}, publisher={Performance Engineering Lab}, organization={Performance Engineering Lab}, abstract={This paper describes and formalises the Service}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={451}, title={Efficient Delivery of Multimedia Streams over Broadband Networks using QOAS}, booktitle={IEEE Trans. on Broadcasting}, year={2006}, abstract={Quality Oriented Adaptation Scheme (QOAS) is}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={315}, title={Non-Intrusive End to End Run-time Path Tracing for J2EE Systems}, booktitle={IEE Proceedings-Software}, year={2006}, publisher={Performance Engineering Lab}, organization={Performance Engineering Lab}, abstract={An end-to-end runtime path-tracing approach for J2EE systems has been introduced. The}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={215}, title={RTS/CTS Based Endpoint Admission Control for VoIP Over 802.11e}, booktitle={MMNS}, year={2006}, abstract={In this paper an endpoint-based admission control mechanism for}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={319}, title={Stall & Path Monitoring Issues in SCTP,IEEE Infocom}, booktitle={Conference on Computer Communications}, year={2006}, publisher={UCD}, organization={UCD}, abstract={This paper presents how SCTP can stall in multihomed}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={321}, title={The 2nd International Middleware Doctoral Symposium:Detecting Performance Antipatterns in Component-Based Enterprise Systems}, booktitle={IEEE Distributed Systems Online }, year={2006}, publisher={PEL}, organization={PEL}, abstract={Internet-enabled enterprise applications often fail to meet}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={317}, title={Utility-based Intelligent Network Selection in Beyond 3G Systems}, booktitle={IEEE International Conference on Communications}, year={2006}, publisher={Performance Engineering Lab}, organization={Performance Engineering Lab}, abstract={Development in wireless access technologies and multihomed}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={185}, title={Cost-oriented Context and Content Data Pair Delivery in Smart PIN}, booktitle={China-Ireland International Conference on Information and Communications Technologies}, year={2007}, month={08 2007}, pages={97-204}, abstract={With evolutions of wireless technologies and advances in mobile services, ubiquitous devices have huge acquired and storing data which requires metadata for user to handle easily. For this purpose, this paper introduces Smart PIN - a novel performance and cost-oriented, context-aware personal information network. Smart PIN architecture includes network components, service components and management components. At the service components, there should be consideration for service discovery, service composition, data replication management and data pair transfer. Among these issues, this paper proposes a novel scheme for efficient delivery of context and content data based on pull and push scheme controlling logical and physical cost function.}, keywords={Context-awareness, Data replication, Cost-effectiveness, Wireless PAN}, author={Seung-Bum Lee and Gabriel-Miro Muntean and Alan F. Smeaton}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={233}, title={Adaptive H.264/MPEG-4 SVC video over IEEE 802.16 Broadband Wireless Networks}, booktitle={Packet Video}, year={2007}, abstract={In this paper we present a solution for delivering streaming video-on-demand to subscribers via an 802.16 broadband wireless access network. The solution leverages the forthcoming H.264/AVC Scalable Video Coding (SVC) scheme and a mechanism to perform rate adaptation based on monitoring changes to the amount of flow traffic in the network at any time. A simulation-based approach is used to determine how the system performs in a rural deployment. Results show that the scheme provides high utilization of the wireless access system, at over 96%. Further, it maintains smooth transmission rate for the video applications, and ensures that no interruptions in continuous video playback occur during the streaming session. Lastly, a comparison with single-layer H.264/AVC is performed, showing how the proposed solution performs better with respect to both system utilization and the fact that no clients suffer interruptions in continuous playback.}, keywords={IEEE 802.16, video streaming, scalable video coding}, author={Odd Inge Hillestad and Andrew Perkis and Vasken Genc and Sean Murphy and John Murphy}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={323}, title={A Non-Elevated Scheduling Solution for First Person Shooter Games in IEEE 802.11 Networks}, booktitle={IEEE Globecom 2007}, year={2007}, publisher={Performance Engineering Lab}, organization={Performance Engineering Lab}, abstract={First Person Shooter (FPS) games are a popular}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={324}, title={A Congestion-only Charging Mechanism for Multiplayer Gaming in Diffrentiated Service Networks}, booktitle={IEEE Globecom 2007}, year={2007}, publisher={Performance Engineering Lab}, organization={Performance Engineering Lab}, abstract={In networks based on the Di®erentiated Services (Di®Serv)}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={325}, title={An Application-quality based Mobility Management Scheme}, booktitle={9th International Conference on Mobile & Wireless Communication Networks}, year={2007}, publisher={IEEE}, organization={IEEE}, abstract={Experimental results are presented for end-point}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={330}, title={A User Controlled Priority Selection Strategy for Multiplayer Games}, booktitle={IEEE 4th Consumer Communications & Networking Conference}, year={2007}, publisher={Performance Engineering Lab}, organization={Performance Engineering Lab}, abstract={Future Quality of Service (QoS) aware networks,}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={441}, title={A Mechanism for Greediness Management whenStreaming Multimedia to Portable Devices}, booktitle={IEEE International Conference on Portable Information Devices}, year={2007}, abstract={The majority of streaming solutions use rate adaptaion based on congestion avoidance mechanisms that try to obtain as much bandwidth as possible from the limited network resources. This is good if we assume that all clients have equal requirements. However this is rarely the case as devices have unique characterstics ( e.g. screen size, screen resolution, location etc) that influence streaming related parameters & consequently the experience obtained by the end user.Due to the inherent greediness of streaming protocols & lack of knowledge about the characterstics of the users devices, this may result in certain devices receiving higher bandwidth share than they actually need & others not receiving enough,affecting the users perceived quality. Therefore there is a need to allow for client diffrentiation in order to provide an acceptable service for all cliemts,taking their device characterstics into account.This paper proposes a Greediness Control Algorithm(GCA),a specially designed application layer solution that tunes the greediness of the multimedia streaming based on client priority, to make more efficient use of the wireless network and increase the overall user perceived quality.}, keywords={Algorithm,Multimedia,Portable Devices}, author={E.Casey and Gabriel-Miro Muntean}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={443}, title={Adaptive Buffer Power Save Mechanism for Mobile Multimedia Streaming}, booktitle={IEEE International Conference on Communication}, year={2007}, publisher={Performance Engineering Lab}, organization={Performance Engineering Lab}, abstract={Wireless networks are becoming a part of everyday}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={327}, title={Congestion-only Charging: A Novel PricinG Mechanism for use in Diffrentiated Service Networks}, booktitle={ACM 4th International Conference on Heterogenous Networking for Quality,Reliablity,Security & Robustness,Qshine2007}, year={2007}, publisher={Performance Engineering Lab}, organization={Performance Engineering Lab}, abstract={In networks based on the Di®erentiated Services (Di®Serv)}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={322}, title={Dynamic Network Selection in Wireless LAN/MAN Heterogenous Networks}, booktitle={Mobile WiMAX:Toward Broadband Wireless Metropolitan Area Networks}, year={2007}, publisher={Performance Engineering Lab}, organization={Performance Engineering Lab}, abstract={In future generations of wireless networks, it is expected that different users with various}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={329}, title={Deployment of Java Based Components in Embedded Environment}, booktitle={International Conference Applied Computing}, year={2007}, publisher={Performance Engineering Lab}, organization={Performance Engineering Lab}, abstract={Component-based development has brought the benefits of easier reuse, integration and rapid development into the}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={217}, title={Evaluation of VoIP in a Mobile Environment using an SCTP based Handoff Mechanism}, booktitle={IST Mobile Summit}, year={2007}, abstract={In parallel with the growth of VoIP services, a large number of manufacturers have begun to develop multimode devices capable of connecting to multiple wireless access networks simultaneously. These multimode terminals have, in principle, the capability to support seamless handover between different radio access networks. One handover solution that utilises the IP diversity which these multimode devices can deliver is SIGMA. SIGMA is a promising end-to-end transport layer handover solution based on SCTP. The objective of this paper is to investigate if SIGMA is capable of providing seamless handover of VoIP calls without degradation in voice quality. To achieve this, we developed a Linux based testbed on which we implemented a VoIP client and server using SIGMA handoff . Each voice call uses the G.711 voice codec over RTP. PR-SCTP is used in place of the traditional UDP as the transport layer protocol. SIGMA based handover was used during full duplex voice calls between the client and server. The ITU-T E-Model has been used to calculate the voice quality during the handover. Results show that SIGMA can be used as a seamless handover mechanism for VoIP without any impact on voice quality.}, keywords={SCTP, VoIP, SIGMA, Seamless Handover}, author={J. Fitzpatrick, S. Murphy, M. Atiquzzaman, J. Murphy}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={435}, title={Electronic Monitoring of Nutritional Components}, booktitle={Information & Telecommunication Technology}, year={2007}, abstract={Obesity and other diseases related to unhealthy diet are problems of near epidemic proportion and}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={445}, title={Effect of Delivery Latency,Feedback Frequency & Network Load on Adaptive Multimedia Streaming}, booktitle={IEEE 32nd Local Computer Neworks Conference }, year={2007}, abstract={As video on demand systems gain popularity, it seems}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={444}, title={Influence of Mobile User Velocity on Data Transfer in a Muti-Network Wireless Environments}, booktitle={9th International Conference on Mobile & Wireless Communication Networks}, year={2007}, abstract={Heterogeneous wireless environments are now a}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={440}, title={Power Save Adaptation Algorithm for Multimedia Streaming to Mobile Devices}, booktitle={IEEE International Conference on Portable Information Devices}, year={2007}, publisher={Performance Engineering Lab}, organization={Performance Engineering Lab}, abstract={Batteries have not followed the exponential technological}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={452}, title={Resource Efficient Quality-Oriented Wireless Broadcasting of Adaptive Multimedia Content}, booktitle={IEEE Trans. on Broadcasting}, year={2007}, abstract={The performance of multimedia stream delivery is}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={326}, title={Supporting First Person Shooter Games in Wireless Local Area Networks}, booktitle={IEEE 18th International Symposium on Personal,Indoor & Mobile Radio Communications}, year={2007}, publisher={IEEE}, organization={IEEE}, abstract={First Person Shooter (FPS) games are a popular online gaming}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={328}, title={SCTP Performance Issue on Path Delay Diffrential }, booktitle={WWIC 5th International Conference on Wired/Wireless Internet Communications}, year={2007}, publisher={Performance Engineering Lab}, organization={Performance Engineering Lab}, abstract={This paper studies the effect of path delay on SCTP performance. It}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={216}, title={Terminal-oriented solutions for seamless service delivery via heterogeneous radio access networks (Invited Paper)}, booktitle={Sarnoff Symposium 2007}, year={2007}, abstract={In this paper, options for providing seamless service delivery to mobile terminals via heterogeneous radio access networks are considered. Despite its current popularity, the Mobile IP solution for mobility management of mobile hosts is discounted due to problems associated with introducing the required network infrastructure and poor handover performance. Rather, the solution described here comprises of a number of key technologies working together. More specifically, the paper argues that the most appropriate solution comprises of the following: adaptive applications, an abstraction layer between application and transport layer, an intelligent transport layer with multi-homing and multi-path support and a means to obtain current state information about each of the available access networks. While work has been ongoing on each of these individual components little has been done to address how they can all be integrated and consider how they may perform in the context of different radio access technologies, potentially operated by different entities. This paper attempts to address some of these issues.}, keywords={Heterogeneous wireless access networks, Handover, Mobile Networking}, author={S. Murphy, M. Atiquzzaman, J. Fitzpatrick, J. Murphy}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={442}, title={User Quality of Experience-Aware Multimedia Streaming over Wireless Home Area Network}, booktitle={IEEE Vehicular Technology Conference}, year={2007}, abstract={For multimedia streaming over wireless networks, there is a trade-off between the capacity of the wireless links and the end-user perceived-quality, which can be affected by the compression scheme used, content characteristics and adaptation algorithm (if any). In this paper, this trade-off is investigated for streaming various motion content multimedia over an IEEE 802.11b-based Wireless-Home Area Network using the Quality-Oriented Adaptation Scheme (QOAS). QOAS performance is compared to that of a non-adaptive scheme when using MPEG-2 and MPEG-4 encoding in terms of average end-user perceived quality, number of streaming sessions concurrently supported, loss rate, delay, jitter and total throughput. Simulation results show that by using QOAS and MPEG-4 encoded streams a much higher number of concurrent streams are supported at an average quality above “good” level on the ITU-T five-point quality scale in comparison with other situations. In this case all the other streaming performance parameters were also significantly better.}, keywords={Adaptive video streaming, Wireless Home Area Network, grading scheme, end-user perceived quality.}, author={Gabriel-Miro Muntean and N.Cranley}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={224}, title={Planning Base Station and Relay Station Locations in IEEE 802.16j Multi-hop Relay Networks}, booktitle={Proc. 2nd IEEE Broadband Wireless Access Workshop, colocated with IEEE CCNC 2008}, year={2008}, month={01/2008}, abstract={In this paper, a problem formulation for determining optimal node location for Base Stations (BSs) and Relay Stations (RSs) in relay-based 802.16 networks is developed. The formulation results in an Integer Programming problem. A small modification to the original model is also considered in which the state space is reduced by limiting which nodes can be associated with which. Standard branch and bound techniques are used to solve the problem. The key findings of the paper are that standard techniques can be used to find solutions to problems of small metropolitan scale or for areas within a larger city.}, keywords={network planning,802.16j,Wimax,relay network}, author={Yang Yu and Sean Murphy and Liam Murphy}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={186}, title={Smart PIN: Utility-based Replication and Delivery of Multimedia Content to Mobile Users in Wireless Networks.}, booktitle={IEEE International Symposium on Broadband Multimedia Systems and Broadcasting 2008: Mobile and Handheld Systems for Entertainment on the Go}, year={2008}, month={04/2008}, abstract={Next generation wireless networks rely on heterogeneous connectivity technologies to support various rich media services such as personal information storage, file sharing and multimedia streaming. Due to users mobility and dynamic characteristics of wireless networks, data availability in collaborating devices is a critical issue. In this context Smart PIN was proposed as a personal information network which focuses on performance of delivery and cost efficiency. Smart PIN uses a novel data replication scheme based on individual and overall system utility to best balance the requirements for static data and multimedia content delivery with variable device availability due to user mobility. Simulations show improved results in comparison with other general purpose data replication schemes in terms of data availability.}, keywords={Content management, Non-real-time service, Interactive systems, Mobile systems, Portable and handheld devices}, author={Seung-Bum Lee and Gabriel-Miro Muntean and Alan F. Smeaton}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={187}, title={User-centric Utility-based Data Replication in Heterogeneous Networks.}, booktitle={IEEE International Conference on Communications, Workshop on Digital Television and Mobile Multimedia Broadcasting (ICC 2008)}, year={2008}, month={05/2008}, abstract={Information overload and convergence of devices aggravate the difficulties of accessing data distributed among various user devices especially when this is performed by mobile users and over heterogeneous wireless networks. Existing data replication systems help increase the performance of the distributed data system, but they do not consider users different levels of interest in various pieces of data and neither heterogeneous wireless connectivity issues. This paper presents the Smart Personal Information Network (Smart PIN), a performance and cost-aware personal information network which uses a novel usercentric utility-based data replication scheme to exchange content automatically, based on both network performance and user interests. The proposed user-centric data replication scheme s evaluation, through simulation, shows improved results in comparison with existing solutions.}, keywords={Data replication, Utility Function, Heterogeneous Network}, author={Seung-Bum Lee and Gabriel-Miro Muntean and Alan F. Smeaton}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={223}, title={A Clustering Approach to Planning Base Station and Relay Station Locations in IEEE 802.16j Multi-hop Relay Networks}, booktitle={Proc. IEEE International Conference on Communications (ICC 2008)}, year={2008}, month={05/2008}, abstract={In this paper, a clustering approach to solve a network planning problem for 802.16j relay networks is considered. Our clustering approach consists of three basic steps: (1) divide the nodes into k distinct clusters, (2) solve the planning problem separately for each cluster, and (3) perform a final optimization to reduce issues arising at cluster boundaries. Simulation results show that our approach is more efficient than existing approaches: solutions of equivalent quality can be found in 40% of the time. Thus our technique can be used to solve larger problems with similar hardware, or similar size problems in less time.}, keywords={network planning,802.16j,Wimax,relay network,clustering}, author={Yang Yu and Sean Murphy and Liam Murphy}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={162}, title={Analysis of Variation in IEEE802.11k Channel Load Measurements for Neighbouring WLAN Systems}, booktitle={ICT Mobile Summit}, year={2008}, month={06/2008}, publisher={IEEE}, organization={IEEE}, abstract={This paper focuses on analysing the variation in IEEE802.11k channel load measurements for neighbouring WLAN systems. The channel load functionality was implemented in the QualNet simulation tool, and several scenarios were configured for testing. The effects of different numbers of active systems with different traffic patterns were examined. The results obtained indicate significant variation in channel load values calculated by different stations experiencing different levels of interference. This variation leads us to question the usefulness of a single channel load measurement; hence considerable care must be taken when using and interpreting such measurements. }, keywords={IEEE802.11k, Channel Load Measurements, Interference}, author={C. Thorpe and S. Murphy and L. Murphy}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={183}, title={A Learner, is a Learner, is a User, is a Customer - QoS-based Experience-aware Adaptation}, booktitle={ACM Multimedia}, year={2008}, month={10/2008}, abstract={This paper describes an outline of the doctoral thesis work}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={109}, title={A Learner, is a Learner, is a User, is a Customer - So what exactly do you mean by Quality of Experience?}, booktitle={Adaptive Hypermedia and Adaptive Web-based Systems}, year={2008},

abstract={An e-learner’s Quality of Experience (QoE) is informed by previous experiences as a learner, a user of computer/web-based systems, and a customer. This paper surveys different concepts for Quality of Experience (QoE) from different areas such as psychology, internet marketing, web engineering, systems and product development as well as philosophy of education. They are summarized into a proposal for a definition of Learner QoE in adaptive multimedia e-learning systems. A number of factors are identified that are likely to impact on QoE. We propose a <st1:place w:st="on">Delphi</st1:place> study to be used to provide an initial ranking of the importance of these factors. Additional user testing will be required to confirm the findings of this study.

 

},

keywords={adaptive hypermedia, quality of experience, educational philosophy}, author={Sabine Moebs and Jennifer McManis}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={184}, title={ADAPTIVE SOCIAL CONNECTEDNESS IN A MULTIMEDIA E-LEARNING ENVIRONMENT}, booktitle={China-Ireland Conference on ICT (CIICT)}, year={2008}, abstract={Adaptive hypermedia systems are beneficial to e-learners in}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={230}, title={An Interference-Aware Analytical Model for Performance Analysis of Transparent Mode 802.16j Systems}, booktitle={Broadband Wireless Access Workshop co-located with GLOBECOM}, year={2008}, abstract={In this paper, an interference-aware analytical model of IEEE 802.16j systems operating in transparent mode is described. The model can be used to determine the throughput gain that can be achieved by 802.16j relay- based systems under a max-min fairness constraint in which the difference between the data rate delivered to all subscribers is minimized. Two variants of the model are considered – one in which there is no spatial reuse and one in which there is spatial reuse. The study finds that this variant of 802.16j system can deliver significant gains over traditional single-hop access systems: 40% in the case in which there is no spatial reuse and up to 80% when spatial reuse is realised.}, keywords={IEEE 802.16j, optimisation problem, performance gain, transparent multihop relay}, author={Vasken Genc and Sean Murphy and John Murphy}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={335}, title={An Analysis of the Performance of an MIH Based Switch Strategy for Heterogenous Network Mobility}, booktitle={IEEE 17th IST Mobile & Wireless Communications Summit}, year={2008}, publisher={Performance Engineering Lab}, organization={Performance Engineering Lab}, abstract={The increasingly ubiquitous deployment of wireless networks has created}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={446}, title={A Balanced Tree-based Strategy for Unstructured Media Distribution in P2P Networks}, booktitle={IEEE International Conference on Communication}, year={2008}, abstract={Most research on P2P multimedia streaming assumes}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={448}, title={Comparitive Study of Real-Time Multimedia Transmission over Multi-Homing Transport Protocols}, booktitle={IEEE /IFIP International Conference on Management of Multimedia Networks & Services}, year={2008}, abstract={The availability of multimedia applications suitable for deployment}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={332}, title={Development of an IEEE 802.11s Simulation Model for QualNet}, booktitle={Networking & Electronic Commerce Research Conference}, year={2008}, publisher={Performance Engineering Lab}, organization={Performance Engineering Lab}, abstract={In this work, an initial variant of an 802.11s simulation model for the QualNet}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={447}, title={DONET-VOD:A Hybrid Overlay Solution for Efficient Peer-to-Peer Video on Demand Services}, booktitle={IEEE International Conference on Multimedia & Expo(ICME)}, year={2008}, abstract={The existing DONet-based approach uses successfully a}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={218}, title={ECHO: A Quality of Service based Endpoint Centric Handover scheme for VoIP}, booktitle={Wireless Communications and Networking Conference (WCNC)}, year={2008}, abstract={Existing terminal oriented handover mechanisms}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={331}, title={Extracting Interactions in Component Based Systems}, booktitle={IEEE Transactions on Software Engineering}, year={2008}, publisher={IEEE}, organization={IEEE}, abstract={Monitoring, analysing and understanding component}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={193}, title={M3S - Multimedia Mobility Management and Load Balancing in Wireless Broadcast Networks}, booktitle={China-Ireland International Conference on Information and Communications Technologies 2008 (CIICT 2008)}, year={2008}, pages={515-521}, abstract={Wireless local-area networks represent a viable broadband Internet access solution for enterprise, residential and public areas. Due to its short range radio, multiple wireless access points are necessary to cover a certain physical area. The tendency of mobile users to group in certain areas of interest and of mobile devices to connect to the access point with the highest signal strength determines the overall network load to be highly unbalanced. To overcome this issues which drastically affects user bandwidth share as well as the efficiency of network resource utilization, special load balancing techniques has to be employed. This paper presents the Multimedia Mobility Management System (M3S), a quality oriented mobility management framework which aims at maximizing user perceived multimedia quality by efficiently distributing the traffic load over all the communication resources available. Simulation based testing results are presented, outlining the performance of M3S against other load balancing techniques which rely on mobile device re-association with least congested access points.}, keywords={wireless broadcast networks, load balance, mobility management}, author={Bogdan Ciubotaru and Gabriel-Miro Muntean}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={436}, title={M3S-Multimedia Mobility Management & Load Balancing in Wireless Broadcast Networks}, booktitle={IET Chine-Ireland International Conference on Information & Communications Technology}, year={2008}, abstract={Wireless local-area networks represent a viable broadband Internet access solution for enterprise, residential and public areas. Due to its short range radio, multiple wireless access points are necessary to cover a certain physical area. The tendency of mobile users to group in certain areas of interest and of mobile devices to connect to the access point with the highest signal strength determines the overall network load to be highly unbalanced. To overcome this issues which drastically affects user bandwidth share as well as the efficiency of network resource utilization, special load balancing techniques has to be employed. This paper presents the multimedia mobility management system (M3S), a quality oriented mobility management framework which aims at maximizing user perceived multimedia quality by efficiently distributing the traffic load over all the communication resources available. Simulation based testing results are presented, outlining the performance of M3S against other load balancing techniques which rely on mobile device re-association with least congested access points}, keywords={Multimedia,Wireless Networks,Mobile Communication}, author={B.Ciubotaru and Gabriel-Miro Muntean}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={231}, title={Performance Analysis of Transparent Relays in 802.16j MMR Networks}, booktitle={WiOpt}, year={2008}, abstract={A simulation study of the performance of transparent mode relay-based 802.16j systems is described. The study focuses on the gain in throughput that is possible in omnidirectional relay systems and increases in signalling requirements that arise due to the multihop network architecture. The study finds that the introduction of transparent mode relays cannot deliver improved throughput for a substantial part of the coverage area of a Base Station (BS) – only approximately half of the total area covered by the BS can benefit from throughput enhancement. Further, the study shows that 802.16j based systems require significant signalling overhead, with almost twice that of 802.16e in the cases studied. Finally, the study demonstrates that in a topology with users uniformly distributed within the BS cell coverage, the maximum throughput increase on the downlink that can be achieved is relatively low. Much further work is necessary to realise useful gains from these systems.}, keywords={MMR, transparent multihop relay, performance, omnidirectional antenna}, author={Vasken Genc and Sean Murphy and John Murphy}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={333}, title={Path Selection of SCTP Fast Retransmission in Multi-Homed Wireless Environments}, booktitle={13th IFIP International Conference on Personal Wireless Communications}, year={2008}, publisher={Performance Engineering Lab}, organization={Performance Engineering Lab}, abstract={In heterogeneous wireless network environments, network connections}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={254}, title={Smooth Adaptive Soft Handover Algorithm for Multimedia Streaming over Wireless Networks}, booktitle={IEEE Wireless Communications & Networking Conference (WCNC)}, year={2009}, month={04/2009}, abstract={Inter-network mobility is achieved by allowing a mobile node to change its point of attachment to the network while preserving connectivity to its corresponding nodes. }, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={260}, title={Enhancing Domain Model with Performance Oriented Metadata for Adaptive E-learning Systems }, booktitle={EdTech}, year={2009}, month={05/2009}, abstract={Due to the increasing complexity of web site navigation, but also as a response to the “one size fits all” approach, adaptation mechanisms have emerged and have started to be used by a large number of on-line educational systems. As educational content may be delivered though various types of networks that differ in characteristics and vary with the time, the quality of the transmitted information is affected. PAMAH (Performance-Aware Multimedia-based Adaptive Hypermedia) proposes to overcome this barrier by taking into consideration in the personalisation process not only the classic learner profile but also the performance of the network connection used by the learner, when rich media content is delivered. This paper focuses on presenting performance oriented metadata required for modelling the educational content and for enhancing the adaptation process. The goal is to provide a personalised media rich content suitable for the learner network connection. }, keywords={Adaptive and personalized e-learning, domain modelling, multimedia }, author={Andreea Molnar and Cristina Hava Muntean}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={261}, title={Performance Aware and Cost Oriented Adaptive e-Learning Framework}, booktitle={IADIS International Conference e-Learning}, year={2009}, month={06/2009}, abstract={Nowadays learners have access to multiple wireless networks from the same hand held device challenging them to choose the best network in terms of cost and performance. However, the Internet billing plans are still difficult to understand, predict and control by most users. This paper presents a user oriented adaptive e-learning framework which takes into consideration: (i) the learner profile when content adaptation is done, (ii) user device that can have multiple wireless connections with different characteristics, (iii) how much the learner is willing to pay, and (iv) the network delivery performance. The goal is to ensure that the learner gets educational content that best suits his/her profile and that content will be delivered over the network which assures the best delivery performance, maintaining also a small price for getting the requested information.}, keywords={adaptive and personalised e-learning, wireless connectivity, budget, framework, user modelling}, author={Andreea Molnar and Cristina Hava Muntean}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={469}, title={Billing Issues when Accessing Personalised Educational Content}, booktitle={China-Ireland International Conference on Information and Communications Technologies (CIICT 2009)}, year={2009}, month={08/2009}, abstract={The increased affordability of mobile devices combined with the availability of the latest wireless technologies have made mobile devices an attractive tool for learning. Nowadays learners can choose between multiple wireless networks with different characteristics, belonging to the same or to different mobile operators. Unfortunately, the Internet billing plans are still difficult to predict and control by most users. This paper presents an algorithm which aims to determine the best network, from a list of available ones (in terms of price), for delivering the selected educational content.}, keywords={cost, mobile data billing plan, mobile learning, adaptive and personalised learning}, author={Andreea Molnar and Cristina Hava Muntean}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={468}, title={A Case Study on Merging Strategies for Authoring QoE-based Adaptive Hypermedia}, booktitle={ECTEL 2009}, year={2009}, month={09/2009}, abstract={This paper describes recent work on strategy merger development in the authoring process of adaptive hypermedia. The goal of a merging strategy is to break a complex adaptation decision into a number of simpler ones which may be reused more easily and applied in different orders. To demonstrate the proposed method we present an example case study and sample strategies written in the LAG language. The case study is based on a recently proposed model for Quality of Experience in e-learning. This model exposes the complex interaction between a number of factors affecting QoE and hence presents a good candidate for the application of a strategy merger. Finally some evaluation points are identified, a conclusion is drawn and next steps are outlined.}, keywords={LAG, Quality of Experience, Quality of Service, Multimedia Learning, Educational Adaptive Hypermedia, Adaptation, Strategy merger}, author={Scotton, J. and Moebs, S, and McManis, J. and Cristea, A.I.}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={470}, title={QoE-MOT – A Learner Quality of Experience- Oriented Authoring Tool}, booktitle={European Conference on Technology Enhanced Learning, A3H: 7th International Workshop on Authoring of Adaptive and Adaptable Hypermedia}, year={2009}, month={09/2009}, abstract={This paper introduces Quality of Experience My Online Teacher (QoE-MOT), a user quality of experience oriented version of the generic authoring tool MOT. QoE-MOT is an authoring tool which enables the creation of performance-aware adaptive courses, by adapting the educational content to the learner network conditions. MOT was developed based on LAOS, a complex five layer authoring model. In similar fashion, QoE-MOT was constructed following the QoE-LAOS, a learner quality of experience oriented authoring model. This paper illustrates how an adaptive educational course has been enhanced with performance oriented metadata and how this metadata and QoE parameters are used during the adaptation process.}, keywords={Authoring tool, Adaptive e-learning, LAOS, QoE, MOT, LAG}, author={Andreea Molnar and Cristina Hava Muntean}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={256}, title={A Novel Adaptive Multimedia Delivery Algorithm for Increasing User Quality of Experience during Wireless and Mobile E-learning}, booktitle={IEEE International Symposium on Broadband Multimedia Systems and Broadcasting (BMSB)}, year={2009}, abstract={Multimedia content is distributed via all types of networks to viewers found in a variety of locations and using different types of devices. Increasing the performance of multimedia stream delivery requires overcoming many technological challenges, all of them having a direct effect on the user perceived quality of experience. The quality of experience influences in turn the quality of any e-learning process. This is as users in general and learners in particular are becoming increasingly quality-aware in their expectations. Therefore delivering a good quality video stream as a part of any e-learning process is very important. This paper proposes a new adaptive multimedia delivery algorithm which can be used in the context of e-learning. The Dynamic Quality Oriented Adaptation Scheme (D-QOAS) adapts the multimedia content sent based on both user preferences and network conditions, while adjusting dynamically its adaptation policy during delivery. Simulation results show that for different user profiles and various network conditions the improvement in end-user perceived quality is significant. Important benefits are obtained in terms of the total number of simultaneous users and in the link utilization, as well as in quality as measured by some video quality metrics.}, keywords={dynamic content adaptation, e-learning, multimedia, rate control, wireless networks}, author={Vasile Horia Muntean and Gabriel-Miro Muntean}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={449}, title={Analysis of Real-Time Multimedia Transmission over PR-SCTP with Failover Detection Delay & Reliablity Level Diffrential}, booktitle={IEEE International Conference on Communication Software & Networks}, year={2009}, abstract={The growing availability of different wireless access technologies provides the opportunity for real-time distribution of multimedia content using multi-homing technology. Investigating the behaviors and quality of such applications under heavy network load is necessary. This paper studies the effect of path failure detection threshold and reliability level on Stream Control Transmission Protocol Partial Reliability Extension (PR-SCTP) performance in symmetric and asymmetric path conditions respectively with different path loss rates. The platform Evalvid-SCTP implemented in the University of Delaware’s SCTP ns-2 module performs the emulation experiment.}, keywords={Real-time; PR-SCTP; Evalvid-SCTP}, author={C.Xu and E.Fallon and Y.Qiao and Gabriel-Miro Muntean and X.Li and A.Hanley}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={343}, title={Bandwidth Allocation in DiffServ Enabled Ethernet Passive Optical Networks}, booktitle={IET Communications}, year={2009}, publisher={Performance Engineering Lab}, organization={Performance Engineering Lab}, abstract={Ethernet Passive Optical Networks (EPONs) have attracted consider-}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={462}, title={Dynamic Switching Between Adaptive FEC Protocols For Multi-Source Streaming}, year={2009}, abstract={Multi-source streaming is essential for the design of a}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={463}, title={Interference Aware Relay Station Location Planning for IEEE 802.16j Mobile Multi-Hop Relay Networks}, booktitle={12th ACM International Conference on Modeling Analysis & Simulation of Wireless & Mobile Systems}, year={2009}, abstract={In this paper, an interference aware algorithm for multi-cell}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={259}, title={Learning Styles or Not? A Classroom Experience}, booktitle={EdTech 2009 - the Irish Educational Technology Users' Conference}, year={2009}, abstract={Secondary Teacher Assistant Researchers (STARs) is a program of Science}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={342}, title={Optimising Metropolitan Area Wireless Path Selection using Media Independent Handover}, booktitle={International Workshop on Cross Layer Design}, year={2009}, publisher={Performance Engineering Lab}, organization={Performance Engineering Lab}, abstract={The Stream Control Transmission Protocol (SCTP) is}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={341}, title={Run-Time Correlation Engine for System Monitoring & Testing}, booktitle={IEEE International Conference on Autonomic Computing(ICAC-09)}, year={2009}, publisher={Performance Engineering Lab}, organization={Performance Engineering Lab}, abstract={Today’s enterprise applications can produce vast amounts of information}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={340}, title={System-Level Performance Evaluation of Multi-Cell Transparent Mode Relay 802.16j Systems}, booktitle={IEEE Globecom 2009}, year={2009}, publisher={Performance Engineering Lab}, organization={Performance Engineering Lab}, abstract={In this paper, the system capacity of a multi-cell}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={460}, title={Seamless Handover of IPTV Streams in a Wireless LAN Network}, year={2009}, abstract={A robust mechanism to enable seamless handover of}, </bibtex> <bibtex> @inproceedings { type={inproceedings }, cite={461}, title={Using 802.11 MAC Retransmission for Path Selection in Multi-Homed Transport Layer Protocols}, booktitle={IEEE Globecom}, year={2009}, abstract={The Stream Transmission Control Protocol(SCTP)is a transport layer protocol which can support mobility through its multi-homing feature. One of the key parameters used by SCTP to manage path selection is Retransmission Time Out(RTO).We illustrate that SCTP evaluation of underlying paths using end to end metrics,results is the calculation of excessive RTO for degraded wireless paths.}, keywords={SCTP,RTO,MAC Retransmissions,Mobility}, author={S.Fallon and P.Jacob and Y.Qiao and A.Hanley and L.Murphy}, </bibtex>