Propostas de esquemas baseados em CAC e reserva de recursos para a provisão de QoS em redes móveis celulares com suporte ao tráfego multimídia

Abstract

The next generation of high-speed mobile/wireless networks will support multimedia applications. The support of such applications imposes Quality of Service (QoS) requirements that have been considered very restrictive in this network environment due to the difficulty of managing the scarce bandwidth, the droppings because of handoff and blocking calls. Thus, in this work, we propose alternative schemes of CAC (Call Admission Control) combined with adaptive bandwidth reservation schemes of adjacent cells, in an end-to-end approach. The results obtained from performance studies based on modeling and simulation, demonstrated that the proposed schemes called Directed Reserve (RDir) and Total Reserve (RT), have presented the lowest CDP (Call Dropping Probability), when compared with similar schemes described in the literature. Thus, these schemes are capable to promote the maintenance of the accepted calls within the network and improve the quality of service of the cellular mobile networks with support to multimedia traffic