This paper proposes a new call quality measure based on mobile signal strength measurements to evaluate performance of handoff algorithms in wireless cellular networks. The proposed measure allows the quantification o...
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This paper proposes a new call quality measure based on mobile signal strength measurements to evaluate performance of handoff algorithms in wireless cellular networks. The proposed measure allows the quantification of the impact of the handoff algorithms of performance. Using the proposed measure we compare existing handoff algorithms to identify the trade-off between signal quality and required number of handoffs. Our results indicate that a handoff method based on a threshold with 2 dB hysteresis provides better performance compared to the conventional wisdom of 3 dB hysteresis. We provide a benchmark value for handoff algorithms based on an off-line heuristic method using the new measure. Our benchmark shows that there is substantial room for improvement of the existing handoff algorithm
The elicitation of requirements for software systems is one of the most critical and complex activities within the development lifecycle. Although the subject has received some degree of attention in the research lite...
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Web Services are being increasingly used for implementing large-scale e-business applications, but at present there is a lack of comprehensive methodologies based on sound engineering principles that can guide designe...
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Distributed collaboration over the Internet has become increasingly common in recent years, supported by various technologies such as virtual workspace systems. Often such collaboration is ad-hoc, and virtual workspac...
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ISBN:
(纸本)9781604235531
Distributed collaboration over the Internet has become increasingly common in recent years, supported by various technologies such as virtual workspace systems. Often such collaboration is ad-hoc, and virtual workspaces are set up anew for each new instance of collaboration. We propose that much of the ad-hoc collaboration can be captured and transformed into patterns for reuse in future collaboration. This paper presents the results of the past five years of our work in this area. We introduce the notion of patterns of virtual collaboration;present a framework for extracting patterns of work in virtual workspace systems;and introduce an information model of virtual collaboration. We then present an overview of our data and process mining methods and reverse engineering techniques for discerning work processes carried out through virtual workspace systems. Finally we present our visual mining techniques that we use to discern aspects of work processes in virtual workspaces.
Metamodelling provides a way of modelling the rules underpinning not only modelling languages such as UML but also processes. In the context of object-oriented development, we evaluate the conceptual framework used to...
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SuperParent-One-Dependence Estimators (SPODEs) loosen Naive-Bayes' attribute independence assumption by allowing each attribute to depend on a common single attribute (superparent) in addition to the class. An ens...
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In this paper we introduce Self-Organizing Map-based techniques that can reveal structural cluster changes in two related data sets from different time periods in a way that can explain the new result in relation to t...
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Method engineering promotes the idea of constructing development methodologies by selecting and assembling method fragments from a pre-existing repository, which is populated with self-contained fragments derived from...
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ISBN:
(纸本)0975339346
Method engineering promotes the idea of constructing development methodologies by selecting and assembling method fragments from a pre-existing repository, which is populated with self-contained fragments derived from industry best practices and compliant with a given metamodel. This tutorial will show how to construct a method fragment repository using a metamodel, how to obtain method fragments (both from analysis of best practices and by extraction from existing methodologies), how to standardise the interfaces of these method fragments and how to construct tailor-made methodologies from these fragments.
Designing component-based application that meets performance requirements remains a challenging problem, and usually requires a prototype to be constructed to benchmark performance. Building a custom benchmark suite i...
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