Volume 2, Issue 6 (Dec 2004)
DISTRIBUTED COMPUTING ISSUE
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TIME-CONSTRAINED DATA BROADCAST SCHEDULING
Principal Investigator:  Tang Xueyan
 
E-mail:      asxytang@ntu.edu.sg
With the rapid growth of the Internet and its user base, there is an increasing demand for information providers to be capable of concurrently delivering a large amount of information to a huge number of users, especially in popular events such as elections and Olympics games. As a result, innovative delivery technologies, including satellite communications (e.g. StarBand and DIRECWAY), cable networks, and wireless networks (e.g. 2.5G and 3G), have been developed and deployed to provide shared broadband Internet access. Different from traditional networks, a distinguished feature of these new technologies is that they naturally support broadcast. In contrast to unicast where an object of interest to multiple clients must be sent individually to each client, broadcast satisfies all outstanding requests for the same object by a single transmission, leading to more efficient use of shared bandwidth. On the other hand, with the emergence of time-critical information services and business-oriented applications, there is an increasing need to support quality of service (QoS) in content distribution. In many situations, user requests are associated with time constraints as a measure of QoS. These constraints can be in the form of a deadline beyond which the user is no longer interested (or less interested) in the requested information. For example, HTTP requests are normally associated with timeout values to prevent users from unlimited wait when the web servers are heavily loaded. The objective of this project is to develop new content distribution techniques to support time-constrained content delivery in broadcast-capable environments. We have proposed a new broadcast scheduling algorithm and are developing a framework to analyze the performance bounds of time-constrained broadcast scheduling. The proposed techniques will be implemented and evaluated with real web traces. The research results are expected to cope with the performance requirements of emerging applications such as real-time traffic and stock information services. “Broadcast is an effective content delivery approach to enhance system scalability.” Principal Investigator: Tang Xueyan E-mail: asxytang@ntu.edu.sg A Satellite-Based Broadcast Architecture
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Dec2004

  • NANYANG CAMPUS GRID Accounting System
  • DESIGN OF A GRID-ENABLED LOW-COST SUPERCOMPUTER WITH MASSIVELY PARALLEL ACCELERATORS
  • MCCF: A Distributed Grid Job Workflow Execution Framework
  • AN INTEGRATED AND ADAPTIVE DECISION SUPPORT FRAMEWORK FOR HIGH-TECH MANUFACTURING AND SERVICE NETWORKS
  • DELTA: A VIRTUAL TRAINING ENVIRONMENT FOR MOUT
  • TIME-CONSTRAINED DATA BROADCAST SCHEDULING
  • COLLABORATIVE OFFICE DOCUMENT EDITING AND REVISION CONTROL
  • DS-Grid: Large Scale Distributed Simulation on the Grid
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