Rachid El-azouzi

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— Consider a wireless ad hoc network with random access channel. We present a model that takes into account topology, routing, random access in MAC layer and forwarding probability. We propose a new approach (based on cycle of transmissions) to derive throughput of multi-hop routes and stability of forwarding queues. With this cycle approach, we correct the(More)
We introduce Markov Decision Evolutionary Games with N players, in which each individual in a large population interacts with other randomly selected players. The states and actions of each player in an interaction together determine the instantaneous payoff for all involved players. They also determine the transition probabilities to move to the next(More)
—Connectivity in vehicular ad hoc networks tends to be vulnerable. This is mostly because of the influence of road's traffic parameters like traffic flow and vehicle's speed. One possible way to improve the connectivity is to add some nodes with higher transmission range. These nodes also could give some commercial services to the vehicles on roads (i.e.(More)
The demand for Internet services that require frequent updates through small messages, such as microblogging, has tremendously grown in the past few years. Although the use of such applications by domestic users is usually free, their access from mobile devices is subject to fees and consumes energy from limited batteries. If a user activates his mobile(More)
In this paper we design an incentive mechanism for heterogeneous Delay Tolerant Networks (DTNs). The proposed mechanism tackles a core problem of such systems: how to induce coordination of DTN relays in order to achieve a target performance figure, e.g., delivery probability or end-to-end delay, under a given constraint in term of network resources, e.g.,(More)
Network coding (NC) techniques for lossy wireless networks have been used for fault-tolerant and timely delivery of streaming video data. Recent research on inter-session NC notwithstanding, reliable transmission of high quality media over wireless networks continues to be a challenge. The effects of traffic and network dynamics on coding block size and(More)
—The amount of streaming traffic has grown enormously in the last years and is expected to continue to grow. However, the Internet still provides only best-efforts and therefore the traffic streaming are distorted by fluctuations in the available bandwidth on the Internet. In this paper we develop an analytical approach to study Quality of user Experience(More)
The demand for wireless broadband access systems supporting mobility of the individual users has dramatically increased in recent years. Therefore, techniques for dynamically adapting the resources to the link condition become necessary for achieving high spectral efficiency. Our aim in this paper is to develop an admission control scheme that handles the(More)