In this paper, we propose a new charging scheme for multi-domain Differentiated Services (DiffServ) networks. Our scheme considers the existence of non-DiffServ networks on the route of transmission. The charging agent at the edge of the source domain inserts Charging Measurement (CM) packets in the DiffServ traffic, which contain traffic and charging information. The CM packets are subsequentl...

In this paper, we model multi-dimensional QoS in a unified framework, and study some fundamental constraints from the network and the traffic on realizing multiple QoS goals. Multidimensional QoS requirements are quantitatively represented using a QoS region. Based on the theory of effective bandwidths, the framework connects the throughput, the delay, and the loss rate in a uniform formula. Im...

We present a simple packet level model to show how marking at the DiffServ boundary node and scheduling and discarding inside a DiffServ node affect the division of bandwidth between two delay classes: elastic TCP flows and streaming non-TCP flows. We conclude that only per flow marking together with dependent discarding thresholds across both delay classes is able to divide bandwidth fairly, a...

Deflection routing and burst segmentation are two techniques for resolving contention in optical burst-switched networks. By selectively applying these techniques to bursts with different QoS requirements, we can offer a range of differentiated services at the optical layer. c 2001 Optical Society of America OCIS codes: (060.4250) Networks

Die kommerzielle Erbringung von IP-Diensten macht neben der Kontrolle des Zugangs zu Diensten über Authentifizierung und Autorisierung eine leistungsfähige Messinfrastruktur zur Erfassung der Ressourcennutzung erforderlich. In Differentiated Services Netzen müssen dazu messtechnische Lösungen zur Erfassung von AccountingDaten und zur Überprüfung der im Service Level Agreement zugesagten Grenzwe...

In this article we examine the architecture of an entity used for automatic management and provisioning of resources for DiffServ networks. We examine the existing literature and implementations in this area, focusing on the design choices made, and we propose an architecture for the design of Bandwidth Brokers that combines an adaptive admission control algorithm for increased utilization of n...

Packet Scale Rate Guarantee (PSRG) is a node model used by IETF for Expedited Forwarding, a priority service defined in the context of Differentiated Services [10]. We review probabilistic performance bounds that apply to PSRG nodes, and improve a previous bound for loss probability.

This paper presents our proposed Border Router Design as we decided to implement it in the NEBULA Project. The Dynamic Resource Allocation Modules here described will be inserted in the prototypal routers described in the other paper [5] so adding the necessary functionalities in order to automatically provide the “mission critical” applications with tool-quality

The significant growths of group communications and QoSaware applications over the Internet have accelerated the development of two key technologies, namely, multicasting and Differentiated Services (DiffServ). Although both are complementary technologies, their integration is a non-trivial task due to several architectural conflicts between them. The inherent heterogeneous nature of QoS multic...

Policy-based Management can guide the behavior of a network or distributed system through high-level declarative directives that are dynamically introduced, checked for consistency, refined and evaluated, resulting typically in a series of low-level actions. We actually view policies as a means of extending the functionality of management systems dynamically, in conjunction with pre-existing “h...