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Our second book-ahead mechanism called Varying-Bandwidth Delayed Start (VBDS) is for data-type (file transfer) requests. By having applications specify file sizes in their reservation requests, a VBDS scheduler is able to assign a varying-bandwidth allocation for different time ranges instead of a single fixed-rate. Through simulations, we show that this approach improves system performance when compared to fixed-bandwidth schemes significantly.
The increasing interest in dynamic circuit networks to support the high-speed and predictable-service requirements of applications leads to the creation of various experimental test beds. One area of networking research in these testbed projects is bandwidth sharing mechanisms. One reference point for dynamic bandwidth-sharing mechanisms in connection-oriented networks is the telephone network. The bandwidth-sharing mechanism used in the telephone network is referred to as the immediate-request mode because there is no provision for making advance reservations for circuits. While this mechanism can be used in new high-speed optical connection-oriented networks, some applications require high per-call bandwidth, and this bandwidth level is a large fraction of even the highest-rate links in use today, the combination of which makes the immediate-request mode unsuitable. Therefore, alternative bandwidth-sharing modes are needed for these networks and applications. This book discusses two new bandwidth-sharing mechanisms based on book-ahead reservation schemes, and presents both the analytical and simulation models for the two mechanisms.
This book constitutes the thoroughly refereed post-proceedings of the First International Conference on Software Engineering Research and Applications, SERA 2003, held in San Francisco, CA, USA in June 2003. The 23 revised full papers presented were carefully selected from 104 initial submissions during two rounds of reviewing and improvement. The papers are organized in topical sections on formal methods; component-based software engineering; software quality, requirements engineering, reengineering, and performance analysis; knowledge discovery and artificial intelligence; and database retrieval and human-computer interaction.
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This is a print on demand edition of a hard to find publication. Society is becoming increasingly reliant on large networked information systems for commerce, communication, education, entertainment and government. Currently, however, system designers lack techniques to predict global behaviors that may arise in the Internet as a result of interactions among existing and altered software components. Hardware faults and unexpected usage patterns may also occur within the Internet. This study aims to improve existing knowledge about a range of methods and tools that could be applied to understand and predict behavior in complex information systems. Charts and tables.
Wireless sensor networks have become an intricate and necessary addition to daily life by providing an energy efficient way to collect and monitor data while rerouting the information to a centralized location. As the application of these networks becomes more common, it becomes imperative to evaluate their effectiveness, as well as other opportunities for possible implementation in the future. The Handbook of Research on Wireless Sensor Network Trends, Technologies, and Applications provides inclusive coverage on the processing and applications of wireless communication, sensor networks, and mobile computing. Investigating emergent research and theoretical concepts in the area of wireless sensors and their applications to daily life, this handbook of research is a critical reference source for students, researchers, engineers, scientists, and working professionals.