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2019•Unpublished venueRequires access

Latency Limits for Content Delivery in a Fog-RAN with D2D Communication

Roy Karasik, Osvaldo Simeone, Shlomo Shitz Shamai

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Abstract

A Fog-Radio Access Network (F-RAN) with arbitrary number of edge nodes and users is studied in which the users are able to cooperate by communicating over out-of-band broadcast Device-to-Device (D2D) links. Placement and delivery strategies are proposed with the aim of minimizing the Normalized Delivery Time (NDT) - a metric that captures the high signal-to-noise ratio worst-case latency for delivering any subset of requested contents to the users. The proposed strategies, based on compress-and-forward, are shown to be optimal to within a constant multiplicative factor of two for all values of the problem parameters. The analysis provides insights on the role of D2D cooperation in improving the delivery latency.

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What this paper is about

A Fog-Radio Access Network (F-RAN) with arbitrary number of edge nodes and users is studied in which the users are able to cooperate by communicating over out-of-band broadcast Device-to-Device (D2D) links. Placement and delivery strategies are proposed with the aim of minimizing the Normalized Delivery Time (NDT) - a metric that captures the high signal-to-noise ratio worst-case latency for delivering any subset of requested contents to the users. The proposed strategies, based on compress-and-forward, are shown to be optimal to within a constant multiplicative factor of two for all values of the problem parameters. The analysis provides insights on the role of D2D cooperation in improving the delivery latency.

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Available abstract

A Fog-Radio Access Network (F-RAN) with arbitrary number of edge nodes and users is studied in which the users are able to cooperate by communicating over out-of-band broadcast Device-to-Device (D2D) links. Placement and delivery strategies are proposed with the aim of minimizing the Normalized Delivery Time (NDT) - a metric that captures the high signal-to-noise ratio worst-case latency for delivering any subset of requested contents to the users. The proposed strategies, based on compress-and-forward, are shown to be optimal to within a constant multiplicative factor of two for all values of the problem parameters. The analysis provides insights on the role of D2D cooperation in improving the delivery latency.

Key concepts: Latency (audio), Content delivery, Computer science, Computer network, Radio access network, Metric (unit), Enhanced Data Rates for GSM Evolution, Telecommunications

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