Keeping in mind the present network management research trends, it can be safely stated that in the near future enterprise networks and ISPs will need a network management entity to dynamically manage QoS networks. DiffServ is one of the emerging networks that introduces bandwidth broker as its logical resource, network and policy management module. Due to the complex and huge functionality pro...

The Differentiated Services model (DS) maps traffic into services that offer different quality levels. However, flows are treated unfairly in each service, since the DS model lacks a policy to distribute service bandwidth between flows that form the service aggregate traffic. We present a signaling protocol called Session-Aware Popularity-based Resource Allocation (SAPRA) that fairly distribute...

The paper first briefly reviews the extent to which profit maximising transport firms with identical cost functions and producing identical transport services pass-on output taxes to transport users under perfect competition, under different forms of imperfect competition and when they act as monopolists. Then the analysis is extended to derive the pass-on rates and activity reductions caused b...

Abstract DiffServ QoS mechanism gives packets various forwarding treatments according to different traffic classes to achieve the QoS goals. This research uses NS-2 simulator to study the resource infringement behavior between higher class services (e.g. VoIP) and lower services under DiffServ domain. Experiments show that resource infringement behavior is highly dependent on the ratio of highe...

In this paper, we focus on efficiently achieving Proportional Delay Differentiation (PDD), an instance of the Proportional Differentiation Model first proposed under the DiffServ framework [IEEE Network (1999)]. PDD can be achieved using a few algorithms, one of the most well-known being Waiting Time Priority(WTP). Using WTP [Proc. ACM SIGCOMM (1999)] as a reference, we show that our proposed S...

This paper provides an overview of an implementation of Differentiated Services interior and boundary nodes as described in the SIMA model. The operation of the network nodes was verified with a series of measurements in a simple networking environment. These measurements also give some idea about the level of Quality of Service this kind of mechanism is able to provide.