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Kian-Lee Tan - Data Dissemination in Wireless Computing Environments

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In our increasingly mobile world the ability to access information on demand at any time and place can satisfy peoples information needs as well as confer on them a competitive advantage. The emergence of battery-operated, low-cost and portable computers such as palmtops and PDAs, coupled with the availability and exploitation of wireless networks, have made possible the potential for ubiquitous computing. Through the wireless networks, portable equipments will become an integrated part of existing distributed computing environments, and mobile users can have access to data stored at information servers located at the static portion of the network even while they are on the move. Traditionally, information is retrieved following a request-response model. However, this model is no longer adequate in a wireless computing environment. First, the wireless channel is unreliable and the bandwidth is low compared to the wired counterpart. Second, the environment is essentially asymmetric with a large number of mobile users accessing a small number of servers. Third, battery-operated portable devices can typically operate only for a short time because of the short battery lifespan. Thus, clients are expected to be disconnected most of the time. To overcome these limitations, there has been a proliferation of research efforts on designing data delivery mechanisms to support wireless computing more effectively. Data Dissemination in Wireless Computing Environments focuses on such mechanisms. The purpose is to provide a thorough and comprehensive review of recent advances on energy-efficient data delivery protocols, efficient wireless channel bandwidth utilization, reliable broadcasting and cache invalidation strategies for clients with long disconnection time. Besides surveying existing methods, this book also compares and evaluates some of the more promising schemes.

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title Data Dissemination in Wireless Computing Environments Kluwer - photo 1


title:Data Dissemination in Wireless Computing Environments Kluwer International Series On Advances in Database Systems ; 19
author:Tan, Kian-Lee.; Ooi, Beng Chin
publisher:Springer Science & Business Media
isbn10 | asin:0792378660
print isbn13:9780792378662
ebook isbn13:9780306470264
language:English
subjectMobile computing, Mobile communication systems.
publication date:2000
lcc:QA76.59.T36 2000eb
ddc:005.4/376
subject:Mobile computing, Mobile communication systems.

Page i

DATA DISSEMINATION IN WIRELESS COMPUTING ENVIRONMENTS

Page ii

The Kluwer International Series on
ADVANCES IN DATABASE SYSTEMS

Series Editor
Ahmed K. Elmagarmid
Purdue University
West Lafayette, IN 47907

Other books in the Series:

MIDDLEWARE NETWORKS: Concept, Design and Deployment of Internet Infrastructure,Michah Lerner, George Vanecek, Nino Vidovic, Dad Vrsalovic; ISBN: 0-7923-7840-7

ADVANCED DATABASE INDEXING,Yannis Manolopoulos, Yannis Theodoridis, Vassilis J. Tsotras; ISBN: 0-7923-77 16-8

MULTILEVEL SECURE TRANSACTION PROCESSING,Vijay Atluri, Sushil Jujodia, Binto George ISBN: 0-7923-7702-8

FUZZY LOGIC IN DATA MODELING,Guoqing Chen. ISBN: 0-7923-8253-6

INTERCONNECTING HETEROGENEOUS INFORMATION SYSTEMS,Athman Bouguettaya, Boualem Benatallah, Ahmed Elmagarmid ISBN: 0-7923-8216-1

FOUNDATIONS OF KNOWLEDGE SYSTEMS: With Applications to Databases and Agents,Gerd Wagner ISBN: 0-7923-8212-9

DATABASE RECOVERY,Vijay Kumar, Sang H. Son ISBN: 0-7923-8192-0

PARALLEL, OBJECT-ORIENTED, AND ACTIVE KNOWLEDGE BASE SYSTEMS,Ioannis Vlahavas, Nick Bassiliades ISBN: 0-7923-8117-3

DATA MANAGEMENT FOR MOBILE COMPUTING,Evaggelia Pitoura, George Samaras ISBN: 0-7923-8053-3

MINING VERY LARGE DATABASES WITH PARALLEL PROCESSING,Alex A. Freitas, Simon H. Lavington ISBN: 0-7923-8048-7

INDEXING TECHNIQUES FOR ADVANCED DATABASE SYSTEMS,Elisa Bertino, Beng Chin Ooi, Ron Sacks-Davis, Kim-Lee Tan, Justin Zobel, Boris Shidlovsky, Barbara Catania ISBN: 0-7923-9985-4

INDEX DATA STRUCTURES IN OBJECT-ORIENTED DATABASES,Thomas A. Mueck, Martin L. Polaschek ISBN: 0-7923-9971-4

DATABASE ISSUES IN GEOGRAPHIC INFORMATION SYSTEMS,Nabil R. Adam, Aryya Gangopadhyay ISBN: 0-7923-9924-2

VIDEO DATABASE SYSTEMS: Issues, Products, and Applications,Ahmed K. Elmagarmid, Haitao Jiang, Abdelsalam A. Helal, Anupam Joshi, Magdy Ahmed ISBN: 0-7923-9872-6

REPLICATION TECHNIQUES IN DISTRIBUTED SYSTEMS,Abdelsalam A. Held, Abdelsalam A. Heddaya, Bharat B. Bhargava ISBN: 0-7923-9800-9

SEARCHING MULTIMEDIA DATABASES BY CONTENT,Christos Faloutsos ISBN: 0-7923-9777-0

Page iii

DATA DISSEMINATION IN WIRELESS COMPUTING ENVIRONMENTS

by
Kian-Lee Tan
Beng Chin Ooi

National University of Singapore

Page iv eBook ISBN 0-306-47026-8 Print ISBN 0-792-37866-0 2002 Kluwer - photo 2

Page iv

eBook ISBN: 0-306-47026-8
Print ISBN: 0-792-37866-0

2002 Kluwer Academic Publishers
New York, Boston, Dordrecht, London, Moscow

Print 2000 Kluwer Academic / Plenum Publishers
Boston

All rights reserved

No part of this eBook may be reproduced or transmitted in any form or by any means, electronic, mechanical, recording, or otherwise, without written consent from the Publisher

Created in the United States of America

Visit Kluwer Online at: http://kluweronline.com
and Kluwer's eBookstore at: http://ebooks.kluweronline.com

Page v

Contents

Preface

vii

1. INTRODUCTION

1.1 Reference Architecture of Wireless Computing Environments

1.2 Characteristics of Wireless Computing Environments

1.3 Potential, Benefits and Applications

1.4 Design Issues in Wireless Data Dissemination

2. MODELS FOR INFORMATION DISSEMINATION

2.1 Taxonomy of Data Delivery Mechanisms

2.2 Performance Metrics

3. DATA BROADCAST SCHEDULING

3.1 Organization of Broadcast for Push-based Broadcast System

3.2 Scheduling Strategies for Pull-based Broadcast System

4. INDEXING ON AIR

4.1 Data Organization for Selective Tuning

4.2 Flat Broadcast Programs with Indexes

4.3 Selective Tuning for Skewed Data Access

4.4 Non-flat Broadcast Programs with Indexes

4.5 Selective Tuning Mechanisms for Pull-Based Model

5. FAULT-TOLERANT BROADCAST ORGANIZATION

5.1 Fault on Air

5.2 Characteristics of Fault Tolerant Index

5.3 Inter-Index Schemes

5.4 Intra-Index Schemes

6. CACHE INVALIDATION MECHANISMS

6.1 A Taxonomy of Cache Invalidation Schemes

6.2 Cache Invalidation Schemes

Page vi

7. BALANCING PUSH AND PULL

7.1 Architecture of Integrated Model

7.2 The Case for Dynamism

7.3 Adaptive Integrated Models

8. SUPPORTING RELATIONAL OPERATIONS

8.1 Cache Coherency Strategies in Pull-based Systems 13

8.2 Join Processing in Push-based Systems

9. CONCLUSIONS

9.1 Summary

9.2 Research Directions

References

Index

Page vii

Preface

In our increasingly mobile world, the ability to access information on demand at any time and place can satisfy people's information needs as well as confer on them a competitive advantage. The emergence of battery-operated, low-cost and portable computers such as palmtops and PDAs, coupled with the availability and exploitation of wireless networks, have made possible the potential of ubiquitous computing. Through the wireless networks, portable equipments will become an integrated part of existing distributed computing environments, and mobile users can have access to data stored at information servers located at the static portion of the network even while they are on the move.

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