Performance analysis of a CAC strategy for heterogeneous traffic arrivals at a multiserver network node

Abstract

Call admission control has become an important field of study in multi-channel communication systems including broadband and wireless networks. In this paper, a multi-server system with narrowband and wideband customers is analyzed. Wideband customers requiring b<inf>w</inf>?1 channels are served in a "blocked calls cleared" manner while blocked narrowband customers requiring 1 channel are allowed to queue in a finite buffer of size B. A matrix algorithmic technique is proposed based on the modified version of Neuts' technique for computation of the blocking probabilities for both types of traffic and the mean delay of narrowband customers in the system. Previous results have been extended to provide an exact solution to the case of calls requiring b<inf>w</inf>?1 and having a limited buffer length B for the queue.