Österlind, Fredrik and Dunkels, Adam (2008) Approaching the maximum 802.15.4 multi-hop throughput. In: The Fifth ACM Workshop on Embedded Networked Sensors (HotEmNets 2008), 2-3 June 2008, Charlottesville, Virginia, USA.
Recent work in sensor network energy optimization has shown that batch-and-send networks can significantly reduce network energy consumption. Batch-and-send networks rely on effective batch data transport protocols, but the throughput of state-of-the-art protocols is low. We present conditional immediate transmission, a novel packet forwarding mechanism, with which we achieve a 109 kbit/s raw data throughput over a 6-hop multi-channel 250 kbit/s 802.15.4 network; 97% of the theoretical upper bound. We show that packet copying is the bottleneck in high-throughput packet forwarding and that by moving packet copying off the critical path, we nearly double the end-to-end throughput. Our results can be seen as an upper bound on the achievable throughput over a single-route, multi-channel, multihop 802.15.4 network. While it might be possible to slightly improve our performance, we are sufficiently close to the theoretical upper bound for such work to be of limited value.
|Item Type:||Conference or Workshop Item (Paper)|
|Deposited By:||Fredrik Österlind|
|Deposited On:||19 Sep 2008|
|Last Modified:||18 Nov 2009 16:22|
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