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On energy-efficient caching at the wireless edge

Published: 01 December 2016 Publication History

Abstract

In this paper we study the problem of content placement for caching at the wireless edge with the goal to maximize the energy efficiency (EE) of heterogeneous wireless networks. We derive the EE performance of an MDS-encoded caching scheme, and we formulate the optimal caching scheme as a convex optimization problem. We then thoroughly study the performance of this optimal scheme for an important heterogeneous network scenario. In particular we compare it to several other sub-optimal caching strategies, such as the caching scheme minimizing the backhaul rate, and we analyze how the system parameters affect the overall performance. As demonstrated by our results, our optimal placement of MDS-encoded content in caches at the wireless edge increases significantly the EE, and hence careful design of edge caching in heterogeneous networks yields significant energy savings.

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cover image ACM Other conferences
CCDWN '16: Proceedings of the 1st Workshop on Content Caching and Delivery in Wireless Networks
December 2016
58 pages
ISBN:9781450340540
DOI:10.1145/2836183
Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for components of this work owned by others than ACM must be honored. Abstracting with credit is permitted. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee. Request permissions from [email protected]

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Association for Computing Machinery

New York, NY, United States

Publication History

Published: 01 December 2016

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  1. caching
  2. energy efficiency
  3. wireless communications

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