In this paper, we analyze the tradeoffs between signaling and resource utilization in DiffServ networks partitioned in areas (hierarchical domains) using flow aggregates that can be dynamically adjusted. These tradeoffs are studied using two analytical models. In the first model, based on multidimensional birth-death processes, the offered load is detailed at the flow level, which allows accura...

The new standard IEEE 802.11e targets at enhancing the legacy 802.11 so that QoS management over WLAN standards becomes possible. This is done by the introduction of two new functions, the enhanced distributed channel access (EDCA) and the hybrid coordination function controlled channel access (HCCA) for offering diffserv and intserv functionalities. The efficient coordination of both functions...

The Differentiated Services (Diffserv) architecture is a scalable solution for providing Quality of Service (QoS) over packet switched networks. By its very definition, Diffserv is not intended to provide strict performance guarantees to its subscribers. We purpose in this paper a particular form of relative performance guarantees. Specifically, the network manager’s goal is to maintain pre-def...

This paper proposes a method for scheduling and buffer management in differentiated services networks which is based on JoBS algorithm. JoBS differentiates traffic classes base on delay and loss rate. Furthermore, it supports both relative and absolute constraints. Nowadays with the expansion of Internet traffic and its diversified service requests, the focus is on requirement of new traffic us...

Internet applications and users have very diverse quality of service expectations, making the same-service-to-all model of the current Internet inodequate and limiting. There i s a widespread consensus today that the Internet architecture has to be extended with service differentiation mechanisms so that certain users and applications can get better service than others at a higher cost. One app...