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A performance evaluation of real time services (such as video streaming) over mobile ad-hoc networks using both hierarchical and flat routing protocols is showed in this paper. A variety of workload and scenarios, as characterized by mobility, load and size of the ad hoc network have been simulated using NS-2. We use OLSR as the flat routing protocol and our own implementation of HOLSR (which uses HNA messages) as the hierarchical one. We make a complete comparison between these protocols focused on video evaluation. The simulations lets us compare the quality of service (QoS) of the video streaming paying attention to objective parameters (PSNR, packet delivery ratio, packet delay). Results indicate that traffic overload is reduced and video quality is improved using hierarchical protocols.

Performance evaluation of video streaming over ad-hoc networks using flat and hierarchical routing protocols