Partitioning the End‐to‐End QoS Budget to Domains
Bushra Anjum, Harry G. Perros · 2014
Quality of service (QoS) constraints for a packet flow is generally specified for the entire path, which may traverse several domains operated by different internet service providers (ISPs). This chapter gives examples where an expression for adding percentiles can be useful. It presents an expression for adding up percentiles of random variables that are exponentially distributed with either the same or different rates. The results are then extended to the more general Coxian-2 distribution. Next, the distribution of the QoS budget to individual providers is addressed. The chapter provides an example of calculating the shortest path using Dijkstra's algorithm that minimizes the total percentile of a performance metric, such as delay, energy, jitter and power attenuation of a signal.