Approximations for Call-Blocking Probabilities in Multirouting Multicasting Multirate Loss Networks

Abstract

Abstract.For the end-to-end call blocking probability computation in multi-rate loss networks the so called reduced load approximation under link independence assumption is often used, because it allows derivation of analytical results. However, its accuracy and extendibility to multirouting or multicasting networks (like the B-ISDN) is seldom studied. This paper proposes new analytical methods for approximating the call blocking probabilities for alternative routing and point-to-multipoint connections. The results are derived for different cases and techniques and further generalised for Whitt's summation bound.