Theoretical Maximum Throughput of IEEE 802.11 and its Applications
NCA '03 Proceedings of the Second IEEE International Symposium on Network Computing and Applications
Revisiting multimedia streaming in mobile ad hoc networks
Proceedings of the 2006 international workshop on Network and operating systems support for digital audio and video
Overview of the H.264/AVC video coding standard
IEEE Transactions on Circuits and Systems for Video Technology
MAC layer support for delay tolerant video transport in disruptive MANETs
NETWORKING'11 Proceedings of the 10th international IFIP TC 6 conference on Networking - Volume Part I
Towards scalable and realistic node models for network simulators
Proceedings of the ACM SIGCOMM 2011 conference
Onto scalable Ad-hoc networks: Deferred Routing
Computer Communications
Modeling communication software execution for accurate simulation of distributed systems
Proceedings of the 2013 ACM SIGSIM conference on Principles of advanced discrete simulation
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Despite the importance of real-world experiments, nearly all ongoing research activities addressing video streaming over MANETs are based on simulation studies. Earlier research shows that the limited resources of mobile handhelds, which are not modeled in most network simulators, can be a severe bottleneck. We study the capability of a modern handheld to perform one core task, which is the forwarding of video streams. We present end-to-end video quality and network measurements, along with an analysis of resource consumption. Our studies of the recent handheld Nokia N900 show that it can forward up to 3.70 Mbps. However, subjective video quality is compromised already at 3.35 Mbps, due to excessive delay. Our analysis unveils that direct memory access (DMA) relieves the CPU of forwarding overhead and that, due to the digital signal processor (DSP) support, additional coding overhead does not decrease the forwarding capacity. Finally, we find that power management impacts results considerably. It is possible to increase the forwarding capacity up to 27.4% by increasing the frequency of internal buses. Hence, our results demonstrate that the forwarding capacity is highly dependent on the internal state and activity of the device.