A Survey of Medium Access Mechanisms for Providing QoS in Ad-Hoc Networks

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Impact of misbehaviour on QoS in wireless mesh networks

Proceedings of: 8th International IFIP-TC 6 Networking Conference (Networking 2009), Aachen, Germany, May 11-15, 2009This paper analyzes the impact of misbehaviour on QoS provisioning in wireless mesh networks. Misbehaviour occurs when a network participant decides not to cooperate. Since cooperation is fundamental for distributed environments such as mesh networks, misbehaviour can be a serious threat to them. In this work, the authors focus on the IEEE 802.11 EDCA medium access function which provides QoS in mesh networks. Simulation studies have been performed to determine what realistic forms of misbehaviour can occur and what their impact is. From these results the most beneficial forms of MAC layer misbehaviour in multihop mesh networks are derived.European Community's Seventh Framework ProgramThe research leading to these results has received funding from the European Community's Sixth Framework Programme under grant agreement n° 0384239 (NoE CONTENT). The research leading to these results has received funding from the European Community's Seventh Framework Programme (FP7/2007-2013) under grant agreement n° 214994.Publicad

Providing QoS Guarantees in Broadband Ad Hoc Networks, Journal of Telecommunications and Information Technology, 2011, nr 4

This paper presents a novel QoS architecture for IEEE 802.11 multihop broadband ad hoc networks integrated with infrastructure. The authors describe its features, including MAC layer measurements, traffic differentiation, and admission control. The modules required by the network elements as well as their integration are also presented. Additionally, the paper presents results which validate its correct operation and prove its superiority over plain IEEE 802.11. The authors are convinced that the proposed solution will provide QoS support for a variety of services in future mobile ad hoc networks

Practical analysisof IEEE 802.11b/g cardsin multirate ad hoc mode, Journal of Telecommunications and Information Technology, 2008, nr 1

In multirate ad hoc networks, mobile stations usually adapt their transmission rates to the channel conditions. This paper investigates the behavior of IEEE 802.11b/g cards in a multirate ad hoc environment. The theoretical upper bound estimation of the throughput in multirate ad hoc networks is derived. The measurement scenarios and obtained results are presented. For result validation the theoretical and experimental values are compared. The achieved results, presented in the form of figures, show that cards manufactured by independent vendors perform differently. Therefore, choosing the optimum configuration, according to the user’s requirements, is possible