A recent statement by AT&T CEO Ed Whitacre sparked considerable fear in the public that the Internet may not be open any more: the ISPs dictate which sites/applications flourish and which flounder. The statement triggered the heated debate on net neutrality and ignited the battle to enact net neutrality legislation. However, by the date of writing, all attempts to pass net neutrality laws have ...

Quality of Service (QoS) refers to a set of rules or techniques that help the network administrators use the available network resources optimally to manage the effects of congestion and to treat the applications according to their needs. The differentiated services architecture (DiffServ) allows providing quality of service to users. The major DiffServ premise is that individual flows with sim...

Understanding the nature of traffic in high-speed communication systems is essential for achieving QoS in these networks. A first step towards this goal is understanding how basic QoS mechanisms work and affects the network predictability before we introduce more complex mechanisms such as admission control. In this paper we analyse the effect of a DiffServ inspired QoS concept applied to virtu...

In this paper the initial ideas about managing quality of service in Differentiated Services networks with help of Bandwidth Brokers have been presented. The results of simulations of how a possible signalling traffic would affect the behaviour of other data streams have been included.

As the Internet is undergoing substantial changes, there are many demands for the quality of the communication. Differentiated Services was standardized to meet such requirements. Currently, it is assumed that Diffserv is used under static Service Level Agreement (SLA). Under static SLA, the agreement between the service provider and the service subscribers are made as a result of negotiation b...

This document is a preliminary specification of the IPv6 Quality of Service (QoS) tests that will be carried out by the various partners in 6NET. We describe the QoS testbed infrastructures of the various partners and the tests that will be performed. The majority of the tests will be concerned with the provision of Differentiated Services both within the partner networks and between partner ne...

This paper presents a new statistical model for detecting signs of abnormality in static-priority scheduling networks with differentiated services at connection levels on a class-by-class basis. The formulas in terms of detection probability, miss probability, probabilities of classifications, and detection threshold are proposed.

This paper proposes a model featuring the heterogeneity of consumer preferences and analyzes the multiple equilibrium of retail formats by building a map of the relationships between consumer heterogeneity and retail formats. The key questions analyzed in this paper are how the retailer adjusts its combination of marketing elements through repositioning and how innovation in retail formats is i...

In the core of a high-capacity network, service differentiation may still be needed to support applications’ utilization of the network. Applications with similar traffic characteristics and performance requirements are mapped into Diffserv service classes based on endto-end behavior requirements of the applications. However, some network segments may be configured in such a way that a single f...

Internet Engineering Task Force (IETF) has proposed many new technologies to cover the new real time applications which have become very important in today's Internet demands. One such technology is Differentiated Services (DiffServ). DiffServ routers provide Per Hop Behaviors (PHBs) to aggregate traffic for different level of services. There is an unfairness problem that occur in a DiffServ ne...