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— This paper describes an adaptive service differentiation scheme for QoS enhancement in IEEE 802.11 wireless ad-hoc networks. Our approach, called Adaptive Enhanced Distributed Coordination Function (AEDCF), is derived from the new EDCF introduced in the upcoming IEEE 802.11e standard. Our scheme aims to share the transmission channel efficiently. Relative(More)
Quality-of-service (QoS) is a key problem of today's IP networks. Many frameworks (IntServ, DiffServ, MPLS etc.) have been proposed to provide service differentiation in the Internet. At the same time, the Internet is becoming more and more heterogeneous due to the recent explosion of wireless networks. In wireless environments, bandwidth is scarce and(More)
The IEEE 802.11 Task Group E is working on a QoS-aware MAC protocol involving Enhanced Distributed Channel Access (EDCA). This scheme was developed to offer QoS capabilities to WLAN, offering significant improvements to multimedia traffic. MANETs will also benefit from this new technology since the most widely deployed and used wireless cards are those(More)
We describe an adaptive routing mechanism based on the energy consumption speed of nodes for on-demand routing protocols in mobile ad-hoc networks. Our algorithm allows a fairly energy consumption during route establishment by building routes that are lower congested than the others. To do this, the congestion information is obtained from a computed cost(More)
— Nowadays, the cross-layer design approach is an important concept in mobile ad-hoc networks which is adopted to solve several open issues. It aims to overcome MANET performance problems by allowing protocols belonging to different layers to cooperate and share network status informations while still maintaining separated layers. Indeed, the mechanisms on(More)
In this work, we present a cross-layer forwarding strategy (CLFS), which is based on the cooperation between the new IEEE 802.11e MAC protocol (EDCA) and the on-demand AODV routing protocol. The proposal aims to minimize the number of forwarding nodes (FN) by hop, in the network. By this way, we decrease the contention amount and we improve the medium(More)
One of the key challenges in multimedia networks is video delivery over wireless channels. MRC (Multi-Resolution Coding) Layered video, divides video into a base layer and multiple enhancement layers. In this paper, we aim to improve video quality, impacted by high channel contention, through mapping individual video layers to EDCA (Enhanced Distributed(More)
The link delivery probability in a wireless mesh network is most accurately determined only by experiment, as it depends on many factors, including environment characteristics, transmission power, distance between transmitter and receiver, channel fading, and background noise. This paper provides an insightful framework for characterizing link performance(More)