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Caching in heterogeneous satellite networks with fountain codes
Author(s) -
Recayte Estefanía,
Lázaro Francisco,
Liva Gianluigi
Publication year - 2019
Publication title -
international journal of satellite communications and networking
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.388
H-Index - 39
eISSN - 1542-0981
pISSN - 1542-0973
DOI - 10.1002/sat.1323
Subject(s) - computer science , backhaul (telecommunications) , fountain code , computer network , geostationary orbit , cache , phy , luby transform code , satellite , telecommunications , decoding methods , wireless , block code , physical layer , linear code , base station , engineering , aerospace engineering
Summary In this paper, we investigate the performance of caching schemes based on fountain codes in a heterogeneous satellite network. We consider multiple cache‐aided hubs, which are connected to a geostationary satellite through backhaul links. With the aim of reducing the average number of transmissions over the satellite backhaul link, we propose the use of a caching scheme based on fountain codes. We derive a simple analytical expression of the average backhaul transmission rate and provide a tight upper bound on it. Furthermore, we show how the performance of the fountain code‐based caching scheme is similar to that of a caching scheme based on maximum distance separable codes.