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  1. Proceedings of the second ACM SIGCOMM workshop on Networking, systems, and applications on mobile handhelds (MobiHeld '10)
  2. On the forwarding capability of mobile handhelds for video streaming over MANETs
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On the forwarding capability of mobile handhelds for video streaming over MANETs
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On the forwarding capability of mobile handhelds for video streaming over MANETs

Content Provider ACM Digital Library
Author Plagemann, Thomas Rodriguez-Fernandez, Daniel Kristiansen, Stein Lindeberg, Morten
Abstract 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.
Starting Page 33
Ending Page 38
Page Count 6
File Format PDF
ISBN 9781450301978
DOI 10.1145/1851322.1851332
Language English
Publisher Association for Computing Machinery (ACM)
Publisher Date 2010-08-30
Publisher Place New York
Access Restriction Subscribed
Subject Keyword Performance evaluation Handhelds Video streaming Manets
Content Type Text
Resource Type Article
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