Technical Program

Paper Detail

Paper Title Latency Limits for Content Delivery in a Fog-RAN with D2D Communication
Paper IdentifierWE1.R4.3
Authors Roy Karasik, Technion - Israel Institute of Technology, Israel; Osvaldo Simeone, King's College London, United Kingdom; Shlomo Shamai (Shitz), Technion - Israel Institute of Technology, Israel
Session Cloud and Fog Networks
Location Odéon, Level 3
Session Time Wednesday, 10 July, 09:50 - 11:10
Presentation Time Wednesday, 10 July, 10:30 - 10:50
Manuscript  Click here to download the manuscript
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.