Sequential Hypothesis Criterion Based Optimal Caching Schemes Over Mobile Wireless Networks

Xi Zhang, Qixuan Zw, H. Vincent Poor

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The sequential hypothesis testing technique has been broadly applied in a large number of engineering applications because it provides the efficient rules to make a decision of accepting one of hypotheses at any stage of the experiment. One important application is the optimal caching scheme design in 5G and beyond mobile wireless networks through observing the data contents requested by mobile users as an experiment and making a decision on what distribution of the requested data-content is. Making this decision, cache stations in mobile wireless network are able to estimate the popularity of requested data contents in the future and thus proactively cache the popular data contents in nearby mobile users to avoid the retransmission and its delay for the same data, optimizing the time-sensitive data download services. Towards this end, we model the optimal caching as the estimation strategy problem of future data popularity through developing the optimal stopping and decision rules under the Zipf sequential hypothesis testing. First, we show that our developed Zipf sequential hypothesis testing is exponentially bounded. Then, we derive the lower bound of the stopping time. Finally, we derive the closed-form solution of optimal stopping and decision rules for sequential hypothesis testing under the Zipf distribution.

Original languageEnglish (US)
Title of host publication2020 IEEE International Symposium on Information Theory, ISIT 2020 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1254-1258
Number of pages5
ISBN (Electronic)9781728164328
DOIs
StatePublished - Jun 2020
Event2020 IEEE International Symposium on Information Theory, ISIT 2020 - Los Angeles, United States
Duration: Jul 21 2020Jul 26 2020

Publication series

NameIEEE International Symposium on Information Theory - Proceedings
Volume2020-June
ISSN (Print)2157-8095

Conference

Conference2020 IEEE International Symposium on Information Theory, ISIT 2020
CountryUnited States
CityLos Angeles
Period7/21/207/26/20

All Science Journal Classification (ASJC) codes

  • Theoretical Computer Science
  • Information Systems
  • Modeling and Simulation
  • Applied Mathematics

Keywords

  • optimal cache schemes
  • optimal stopping and decision rules
  • Sequential hypothesis testing
  • Zipf distribution

Fingerprint Dive into the research topics of 'Sequential Hypothesis Criterion Based Optimal Caching Schemes Over Mobile Wireless Networks'. Together they form a unique fingerprint.

  • Cite this

    Zhang, X., Zw, Q., & Poor, H. V. (2020). Sequential Hypothesis Criterion Based Optimal Caching Schemes Over Mobile Wireless Networks. In 2020 IEEE International Symposium on Information Theory, ISIT 2020 - Proceedings (pp. 1254-1258). [9174031] (IEEE International Symposium on Information Theory - Proceedings; Vol. 2020-June). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ISIT44484.2020.9174031