Stateless and Controlled Reservation Based DiffServ Model for Mobile Ad Hoc Networks

The basic DiffServ model lacks the mechanism to prevent itself from being overload; it does not have any capability to inform the edge nodes about the internal traffic load in the network. Thus, injecting more QoS sensitive traffic into the network will not only degrade the performance of the current flow but it will also degrade the performance of already established flows. In this research paper we present an admission control mechanism that establishes QoS enabled Label Switched Paths in-order to provide rigorous QoS provisioning within the DiffServ enabled mobile ad-hoc network. We have presented a scheme that works by merging the signaling overhead with routing. We have performed extensive simulations to measure the effectiveness of our presented idea and we have observed that our scheme meets stringent QoS requirements of real time flows compared to some existent QoS models. Each admitted flow gets low delay, low jitter and almost guaranteed bandwidth. We have also observed that in most of the cases our scheme provides load balancing if multiple path exists to the destination.