Neyman-pearson criterion based optimal hierarchical caching over D2D wireless Ad-Hoc networks

Xi Zhang, Qixuan Zhu, H. Vincent Poor

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

1 Scopus citations


Caching in mobile devices is a new paradigm to revolutionize the traditional data contents (i.e., files) sharing methods in wireless cellular networks. By caching the popular data contents in mobile devices and disseminating these data contents through device-to-device (D2D) communications, the wireless cellular network can improve its area spectral efficiency, save the base station bandwidth consumptions, and reduce the transmission delay of downloading. The caching scheme is closely related to the data popularity prediction, but how to accurately estimate the future popularity profile has not been well understood. Moreover, although the hierarchical caching architecture has been shown to yield more benefits than flat caching strategies, the challenge of designing an optimal hierarchical caching scheme has not been thoroughly addressed. In this paper, we use Neyman- Pearson hypothesis testing mechanism to predict the future data popularity, and also propose and optimal hierarchical caching schemes over D2D wireless ad-hoc networks. The key of Neyman- Pearson hypothesis testing in our proposed scheme is to derive the closed form of the decision threshold, which in a function of costs if choosing the incorrect hypotheses. We formulate these costs as the sum of time durations for content placement phase and content delivery phase. We derive the closed form expressions of these two phases respectively and obtain the closed form of optimal decision rule, which maximizes the cache hitting probability and upperbounds the prediction error probability. Finally, we evaluate and validate our proposed Neyman-Pearson hypothesis testing based hierarchical caching schemes through numerical analyses.

Original languageEnglish (US)
Title of host publication2019 IEEE Global Communications Conference, GLOBECOM 2019 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781728109626
StatePublished - Dec 2019
Event2019 IEEE Global Communications Conference, GLOBECOM 2019 - Waikoloa, United States
Duration: Dec 9 2019Dec 13 2019

Publication series

Name2019 IEEE Global Communications Conference, GLOBECOM 2019 - Proceedings


Conference2019 IEEE Global Communications Conference, GLOBECOM 2019
Country/TerritoryUnited States

All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications
  • Hardware and Architecture
  • Information Systems
  • Signal Processing
  • Information Systems and Management
  • Safety, Risk, Reliability and Quality
  • Media Technology
  • Health Informatics


  • Adhoc wireless networks
  • Cost function
  • D2D communications
  • Degree of freedom
  • Hierarchical caching
  • Neyman-Pearson hypothesis testing
  • Zipf distribution


Dive into the research topics of 'Neyman-pearson criterion based optimal hierarchical caching over D2D wireless Ad-Hoc networks'. Together they form a unique fingerprint.

Cite this