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Oliver W. W. Yang

Bio: Oliver W. W. Yang is an academic researcher from University of Ottawa. The author has contributed to research in topics: Wireless ad hoc network & Network packet. The author has an hindex of 29, co-authored 261 publications receiving 3062 citations. Previous affiliations of Oliver W. W. Yang include Sahand University of Technology & Ottawa University.


Papers
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Journal ArticleDOI
TL;DR: The challenges in designing the essential functional components of AHVN and the corresponding protocols for radio link control, routing, congestion control, security and privacy, and application development are discussed and the related work in the literature are reviewed.

201 citations

Proceedings ArticleDOI
11 Jun 2001
TL;DR: The simulation results show that the proposed multipath routing protocol, MSR, improves the packet delivery ratio and the throughput of TCP and UDP, and reduces the end-to-end delay and the average queue size, while adding little overhead.
Abstract: In this paper, we propose a new multipath routing protocol for ad hoc wireless networks-multipath source routing (MSR), which is an extension of DSR (dynamic source routing). Based on the measurement of RTT, we propose a scheme to distribute load among multiple paths. The simulation results show that our approach improves the packet delivery ratio and the throughput of TCP and UDP, and reduces the end-to-end delay and the average queue size, while adding little overhead. As a result, MSR decreases the network congestion and increases the path fault tolerance quite well.

148 citations

Proceedings ArticleDOI
Linifang Zhang1, Zenghua Zhao1, Yantai Shu1, Lei Wang1, Oliver W. W. Yang 
07 Aug 2002
TL;DR: Simulation results show that MSR with load balancing is so effective that the end-to-end delay is decreased significantly while the network resource can be utilized more efficiently than that in DSR (dynamic source routing).
Abstract: A load-balancing scheme has a significant effect on the performance of the multipath routing protocol, especially in an ad hoc network environment. In order to analyze the effect on the distribution of input traffic among multiple paths in MSR (multipath source routing), we first established a network queuing model that would incorporate the cross-traffic among these paths. We then considered the load balancing as an optimization problem. The solution to the optimization problem is interestingly in accordance with the heuristic equation proposed by Wang ICC'2001 (2001). Our simulation results show that MSR with load balancing is so effective that the end-to-end delay is decreased significantly while the network resource can be utilized more efficiently than that in DSR (dynamic source routing).

144 citations

Journal ArticleDOI
TL;DR: A systematical investigation of current state-of-the-art algorithms for the energy-aware multicast routing problem and the MLB/MLM problem in wireless ad hoc networks with omni-directional and directional antennas is presented.

127 citations

Proceedings ArticleDOI
11 May 2003
TL;DR: A general expression of seasonal ARIMA models with two periodicities is given and procedures to model and to predict traffic using seasonal ARimA models are provided.
Abstract: Seasonal ARIMA model is a good traffic model capable of capturing the behavior of a network traffic stream. In this paper, we give a general expression of seasonal ARIMA models with two periodicities and provide procedures to model and to predict traffic using seasonal ARIMA models. Our feasibility study experiments showed that seasonal ARIMA models could be used to model and predict actual wireless traffic such as GSM traffic in China.

120 citations


Cited by
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[...]

08 Dec 2001-BMJ
TL;DR: There is, I think, something ethereal about i —the square root of minus one, which seems an odd beast at that time—an intruder hovering on the edge of reality.
Abstract: There is, I think, something ethereal about i —the square root of minus one. I remember first hearing about it at school. It seemed an odd beast at that time—an intruder hovering on the edge of reality. Usually familiarity dulls this sense of the bizarre, but in the case of i it was the reverse: over the years the sense of its surreal nature intensified. It seemed that it was impossible to write mathematics that described the real world in …

33,785 citations

Journal ArticleDOI
01 May 1975
TL;DR: The Fundamentals of Queueing Theory, Fourth Edition as discussed by the authors provides a comprehensive overview of simple and more advanced queuing models, with a self-contained presentation of key concepts and formulae.
Abstract: Praise for the Third Edition: "This is one of the best books available. Its excellent organizational structure allows quick reference to specific models and its clear presentation . . . solidifies the understanding of the concepts being presented."IIE Transactions on Operations EngineeringThoroughly revised and expanded to reflect the latest developments in the field, Fundamentals of Queueing Theory, Fourth Edition continues to present the basic statistical principles that are necessary to analyze the probabilistic nature of queues. Rather than presenting a narrow focus on the subject, this update illustrates the wide-reaching, fundamental concepts in queueing theory and its applications to diverse areas such as computer science, engineering, business, and operations research.This update takes a numerical approach to understanding and making probable estimations relating to queues, with a comprehensive outline of simple and more advanced queueing models. Newly featured topics of the Fourth Edition include:Retrial queuesApproximations for queueing networksNumerical inversion of transformsDetermining the appropriate number of servers to balance quality and cost of serviceEach chapter provides a self-contained presentation of key concepts and formulae, allowing readers to work with each section independently, while a summary table at the end of the book outlines the types of queues that have been discussed and their results. In addition, two new appendices have been added, discussing transforms and generating functions as well as the fundamentals of differential and difference equations. New examples are now included along with problems that incorporate QtsPlus software, which is freely available via the book's related Web site.With its accessible style and wealth of real-world examples, Fundamentals of Queueing Theory, Fourth Edition is an ideal book for courses on queueing theory at the upper-undergraduate and graduate levels. It is also a valuable resource for researchers and practitioners who analyze congestion in the fields of telecommunications, transportation, aviation, and management science.

2,562 citations

Journal Article
TL;DR: In this paper, two major figures in adaptive control provide a wealth of material for researchers, practitioners, and students to enhance their work through the information on many new theoretical developments, and can be used by mathematical control theory specialists to adapt their research to practical needs.
Abstract: This book, written by two major figures in adaptive control, provides a wealth of material for researchers, practitioners, and students. While some researchers in adaptive control may note the absence of a particular topic, the book‘s scope represents a high-gain instrument. It can be used by designers of control systems to enhance their work through the information on many new theoretical developments, and can be used by mathematical control theory specialists to adapt their research to practical needs. The book is strongly recommended to anyone interested in adaptive control.

1,814 citations