Content dissemination in wireless networks exploiting relaying and information-centric architectures
Abstract
We focus on the problem of efficiently integrating
wireless users in future Information-Centric Networks (ICN),
where communication is based on publish-subscribe primitives.
The current host-centric Internet paradigm is abandoned in
favor of information-oriented, rendezvous-based communication,
where multicast data delivery is the norm. However, Wi-Fi, the
predominant means of local wireless connectivity today, but also
3G and 4G technologies, are known to suffer from poor multicast
performance. Data destined to a broadcast or multicast address
are typically transmitted at lower rates to increase reliability for
clients with poor signal conditions, causing unfavorable delays for
high-rate users. One approach to this problem is to designate a
subset of the clients as relays who re-broadcast packets for other
clients at a higher rate. Given that different types of content
have different performance requirements, we exploit contentawareness,
inherent in our environment, to optimize for different
criteria on a per-content basis. For this purpose, we provide a
multi-objective optimization formulation for the problem of relay
selection and rate assignment, which can capture the tradeoff
among reliability, performance and energy cost.