Content dissemination in wireless networks exploiting relaying and information-centric architectures

International audienceWe focus on the problem of efficiently integratingwireless users in future Information-Centric Networks (ICN),where communication is based on publish-subscribe primitives.The current host-centric Internet paradigm is abandoned infavor of information-oriented, rendezvous-based communication,where multicast data delivery is the norm. However, Wi-Fi, thepredominant means of local wireless connectivity today, but also3G and 4G technologies, are known to suffer from poor multicastperformance. Data destined to a broadcast or multicast addressare typically transmitted at lower rates to increase reliability forclients with poor signal conditions, causing unfavorable delays forhigh-rate users. One approach to this problem is to designate asubset of the clients as relays who re-broadcast packets for otherclients at a higher rate. Given that different types of contenthave different performance requirements, we exploit contentawareness,inherent in our environment, to optimize for differentcriteria on a per-content basis. For this purpose, we provide amulti-objective optimization formulation for the problem of relayselection and rate assignment, which can capture the tradeoffamong reliability, performance and energy cost