Our system provides the mechanisms for applications to make and use advance reservations for bandwidth. These mechanisms are built on top of the existing work in IP differentiated services. (The description in this paper is given in terms of IP differentiated service classes, but the intent is that it could also be applied to, e.g., a dynamic ATM circuit set up mechanism where QoS can be specif...

We explore methodology to divide an application’s data into several categories and send them through different IP differentiated services(DiffServ) grades. The issues are motivated by a futuristic infrastructure wherein the Internet service provider charges different prices to packets going through different service grades. This paper discusses how a subscriber of the DiffServ can assign differ...

We propose an architecture for the provision of differentiated services at the web server level. The architecture is validated by means of a simulation model and real web server traces are used as workload. We implement an adaptive algorithm which allows the tuning of the priority level provided and determines how strict the use of priorities will be. The server can then adapt itself to various...

Differentiated service (Diffserv) is a set of technologies used to enable the provisioning of class-based, differentiated quality of service. One of the essential building blocks to realize Diffserv is the use of traffic conditioning mechanisms to support the required forwarding behavior. In this paper, a generic model for traffic conditioning is proposed. The generic traffic conditioner (GTC) ...

In this paper we propose a pricing-enabled QoS for the hybrid UMTS/WLAN network. The proposed methodology is an integration of usage-based, non usage-based, static, and dynamic pricing schemes and DiffServ (Differentiated Services). We propose the utility function and cost function for our needs, and the pricing mechanism is based on differentiated service classes. By the affection of price, a ...

In the Differentiated Services (DS) framework, service differentiation is performed among the aggregates (collection of one or more microflows) rather than among the microflows (data stream pertaining to a single connection). We analyse three quality metrics namely bandwidth, loss and delay (that might be used for defining a service differentiation at a DS node) on two criteria 1) service diffe...

Traffic markers differentiate among packets from senders based on their service profile in the differentiated service networks. Researchers have previously revealed that the existing marking mechanism causes the unfairness in aggregates. This study presents a new marking algorithm. Simulation results demonstrate that the fairness of the proposed scheme exceeds that of SRTCM, TRTCM, TSWTCM and I...

Differentiated Services (DiffServ) has been proposed to meet new requirements for IP networks. This architecture is able to offer a range of different Classes of Service (CoS) to different customers. To achieve the goal, DiffServ must though be supported by other mechanisms and methods that can be used to control and engineer the network. In this respect Traffic Engineering will play an importa...

The Quality of Service (QoS) reservations in Differentiated Service (DiffServ) networks can be classified into two sets: Book-ahead (BA) requests and Instantaneous Requests (IRs). When an admitted BA request becomes active, some ongoing IRs is dropped when the bandwidth is insufficient for supporting both IRs and BA requests. The admission control should predict the lifetime, i.e. look-ahead ti...

Differentiated Service networks (DS) are fair in the way that different types of traffic can be associated to different network services, and so to different quality levels. However, fairness among flows sharing the same service may not be provided. Our goal is to study fairness between multirate multimedia sessions for an assured DS service, in a multicast network environment. To achieve this ...