Centralized caching and delivery of correlated contents over a Gaussian broadcast channel

Qianqian Yang, Parisa Hassanzadeh, Deniz Gündüz, Elza Erkip

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

Abstract

Content delivery in a multi-user cache-aided broadcast network is studied, where a server holding a database of correlated contents communicates with the users over a Gaussian broadcast channel (BC). The minimum transmission power required to satisfy all possible demand combinations is studied, when the users are equipped with caches of equal size. A lower bound on the required transmit power is derived, assuming uncoded cache placement, as a function of the cache capacity. A centralized joint cache and channel coding scheme is proposed, which not only utilizes the user's local caches, but also exploits the correlation among the contents in the database. This scheme provides an upper bound on the minimum required transmit power for a given cache capacity. Our results indicate that exploiting the correlations among the contents in a cache-aided Gaussian BC can provide significant energy savings.

Original languageEnglish (US)
Title of host publication2018 16th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks, WiOpt 2018
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9783903176003
DOIs
StatePublished - May 22 2018
Event16th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks, WiOpt 2018 - Shanghai, China
Duration: May 7 2018May 11 2018

Publication series

Name2018 16th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks, WiOpt 2018

Other

Other16th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks, WiOpt 2018
CountryChina
CityShanghai
Period5/7/185/11/18

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Hardware and Architecture
  • Control and Optimization
  • Modeling and Simulation

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  • Cite this

    Yang, Q., Hassanzadeh, P., Gündüz, D., & Erkip, E. (2018). Centralized caching and delivery of correlated contents over a Gaussian broadcast channel. In 2018 16th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks, WiOpt 2018 (2018 16th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks, WiOpt 2018). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.23919/WIOPT.2018.8362888