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Wireless Networks

, Volume 5, Issue 2, pp 137–147 | Cite as

Broadcast scheduling for information distribution

  • Chi-Jiun Su
  • Leandros Tassiulas
  • Vassilis J. Tsotras
Article

Abstract

Broadcast data delivery is encountered in many applications where there is a need to disseminate information to a large user community in a wireless asymmetric communication environment. In this paper, we consider the problem of scheduling the data broadcast such that average response time experienced by the users is low. In a push-based system, where the users cannot place requests directly to the server and the broadcast schedule should be determined based solely on the access probabilities, we formulate a deterministic dynamic optimization problem, the solution of which provides the optimal broadcast schedule. Properties of the optimal solution are obtained and then we propose a suboptimal dynamic policy which achieves average response time close to the lower bound. The policy has low complexity, it is adaptive to changing access statistics, and is easily generalizable to multiple broadcast channels. In a pull-based system where the users may place requests about information items directly to the server, the scheduling can be based on the number of pending requests for each item. Suboptimal policies with good performance are obtained in this case as well. Finally, it is demonstrated by a numerical study that as the request generation rate increases, the achievable performance of the pull- and push-based systems becomes almost identical.

Keywords

Average Response Time Broadcast Channel Dynamic Optimization Problem Access Probability Achievable Performance 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Kluwer Academic Publishers 1999

Authors and Affiliations

  • Chi-Jiun Su
    • 1
  • Leandros Tassiulas
    • 1
  • Vassilis J. Tsotras
    • 2
  1. 1.Department of Electrical EngineeringPolytechnic UniversityBrooklynUSA
  2. 2.Department of Computer ScienceUniversity of CaliforniaRiversideUSA

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