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JRA.2: Traffic engineering, traffic management, congestion control and end to end QoS Chairman of the JRA.2 : Prof. P. Iovanna WP.JRA.2.1: Mechanisms and protocols for controlled bandwidth sharing, WP leader: Prof. M. Johansson The overall objective of the work package is to develop a further understanding of the issue of congestion control in multi-service networks. A key aspect will be to understand how Internet congestion control mechanisms could evolve in the future (e.g., adapting to networks with high-capacity links and small buffers) using minimal incrementally developable changes. Another aspect will be to evaluate alternative paradigms, such as per-flow fair queuing in a flow-aware network, that allow precise control of fairness between flows without relying on user cooperation. We will also study rate control algorithms in networks with variable-capacity links.  Prof. M. Johansson
 Complete WP description, click here. WP.JRA.2.2: Traffic Management in a Multi-Provider Context, WP leader: Prof. P. Pereira Traffic management concerns the way network resources are shared between competing users. Traffic flows can be broadly classified as streaming flows and non-streaming or data flows. Streaming flows require a certain bandwidth, maximum delay, jitter or packet loss. Non-streaming flows, on the other hand, are elastic, being tolerant to varying network conditions. This work-package deals with concepts and techniques necessary to a fair sharing of network resources, according to the quality of service requirements of the traffic flows generated by each user application. Prof. P. Pereira Complete WP description, click here.
WP.JRA.2.3: Traffic Engineering for cost effective networks, WP leader: Prof. P. Iovanna The activity within this work package aims at analyzing and providing traffic-engineering solutions to meet main requirements of NGN in terms of QoS support and efficient use of the network resource. Routing mechanisms and relating algorithms will be analyzed in different network scenarios such as IntServ, DiffServ, MPLS, GMPLS, including single and multi-layer routing, hybrid routing based on the combination of off-line and on-line methods, routing based on without knowledge of the traffic matrices. Moreover pre-emption mechanism, based on the support of different QoS, will be also analyzed to deal with congestion event. Besides, traffic engineering based on traffic matrix inference will be also analyzed. The work in the framework of this activity is carried out in tight collaboration with the other activities referring to network architecture design, optimization methods, experimental platforms, modelling methods and socio-economic aspects. Prof. P. Iovanna Complete WP description, click here. WP.JRA.2.4: QoS in multiservice wireless networks, WP leader: Prof. Nidhi Hegde This workpackage deals with the way different mechanisms such as congestion control, traffic management and traffic engineering, may ensure quality of service in wireless networks supporting different types of application. These techniques are particularly important in wireless networking due to the scarcity and high cost of the radio interface. The design and the performance analysis of such mechanisms are also extremely challenging due to the phenomenon of fading, i.e., to the inherent time-varying capacity of the radio interface. All types of wireless networks are considered including CDMA, TDMA, OFDM cellular networks, WLANs and Ad-Hoc and Sensor networks. Prof. N. Hegde Complete WP description, click here. WP.JRA.2.5: Reliable and efficient communication in ad hoc and sensor networks, WP leader: Prof. C. Chaudet The topic of this work-package is to look at all the aspects of the data transmission, from the link layer to the application layer, that are specific to ad hoc and sensor networks. What in these distributed wireless networks requires specific treatment to optimize the usage of the already scarce resources while keeping in mind interoperability with other parts of the global network to which they are connected to. Prof. C. Chaudet Complete WP description, click here .
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