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The quality of service support in MANETs has become an important requirement. However, the QOS support in a wireless networks is unlike that of the wireline's because wireless bandwidth is shared among neighboring nodes and the network topology continuously changes with node mobility. This condition requires communicating nodes to collaborate imperatively, in order to determinate the routes and to preserve the vital resources necessary to provide the QOS. The authors investigate in this paper an example of multi-layers quality of service management in MANETs, involving the following quality of services mechanisms: QOS routing with an OLSR extension with QOS support, EDCAF (Enhanced Distributed Coordinate Function) at MAC layer, and a hybrid FEC/ARQ scheme at link layer.
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