Pontificia Universidad Católica de Chile Pontificia Universidad Católica de Chile
Enrique Pena, Miguel Rios, Christian Oberli, Vladimir Marianov, PoQBA: A New Path Admission Control for Diffserv Networks. In T. Enokido, L. Barolli, and M. Takizawa (Eds.): NBiS 2007, LNCS 4658, pp. 435–445, 2007. Springer-Verlag Berlin Heidelberg 2007 (2007)

POQBA: A new path admission control for Diffserv networks

Revista : Lecture Notes in Computer Science
Volumen : 4658
Páginas : 435-445
Tipo de publicación : Revistas


In most DiffServ networks there is a bandwidth broker (BB) that manages the network resources. One of the many tasks of this broker is to perform admission control on the flows entering the network. When there are many frequent calls, the network is large, or the admission
control scheme is very complex, the bandwidth broker can become part of the problem instead of the solution. In those cases the broker might act as a bottleneck, limiting the number of flows entering the network and rejecting some of them even if there are still enough resources
available. This is why distributed and hierarchical architectures of bandwidth brokers are needed. We introduce PoQBA: an algorithm that adapts book-ahead optimization to path oriented hierarchical broker
architecture. The results show that the performance of this algorithm has several advantages compared to normal hierarchical systems and the Hose model.