QoS networks are more and more envisioned to provide preemptable communications. That is, a new call may cause on-going ones to be interrupted depending on the current network utilization. For instance, preemption combined with layered video encoding allows graceful degradation of the received stream to be performed as more and more users compete for resources. We propose a general admission policy that solves the preemption-based resource allocation problem. This policy allows users to compete for call setup and keeping, via a smart market approach. Algorithmic and accounting issues are investigated, inside a single node, in an end-to-end approach and for multicast calls. Our approach must be appreciated as a building block for a higher-level administration policy, in which it provides controlled user competition.
['François Toutain', 'Oliver Huber']
A general preemption-based admission policy using a smart market approach