Turkish Journal of Electrical Engineering and Computer Sciences




Recently, providing live video streaming over hybrid wireless mesh networks (WMNs) has been of great interest. In this kind of network, most of the users usually move with low speed and always keep their connections within the network by attaching to different mesh routers (MRs). When evaluating a mesh technology, it is important to pay special attention to this kind of device as it is mostly handled by the final user. These devices, known as STA nodes, neither run a routing protocol nor perform forwarding operations. Although our proposed distributed locator service in GREENIE makes hybrid WMNs more efficient for supporting STA nodes, video distortion increases when the number of them sharply augments. In order to address this problem, we equip MRs with an efficient multiinterface multichannel (MIMC) algorithm. The proposed algorithm is an engineering solution that completely considers the channel status and its queue length. Moreover, it is cost effective and simple in its implementation without imposing unnecessary complexity on the network. Simulation results using OMNET++ show that all the tested routing protocols, and GREENIE in particular, efficiently exploit the advantages of the designed MIMC algorithm by improving the video distortion, total capacity of successfully received video packets, number of successfully received video frames, packet delay variation, and end-to-end delay metrics. As a result, better video quality can be provided on STA nodes.


Multiinterface multichannel, hybrid wireless mesh networks, live video, performance evaluation

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