On May 7, 2008, at 5:00 AM, Xiaojun Zhu wrote:
> Hi everyone,
> Has any work been done towards the performance evaluation
> of CTP in tinyos2.x?I failed to find one. I mean a comparative stduy
> of CTP vs. other protocols.
>
The only published results on CTP are in HotNets 2007 ("Four Bit
Wireless Link Estimation"). These results report CTP's datapath
efficiency versus MultihopLQI and MintRoute. There are results on
CTP's datapath and control path efficiency, but these are in a paper
under submission. The short answer is that CTP can cut lost packets by
90% and improve efficiency (transmissions per packet delivered at the
root) by 20-30%, while cutting control traffic by two thirds. It does
this while remaining radio chip independent. The tradeoff is that it
is more complex (in terms of code size and RAM) than MultihopLQI. Once
we've nailed all of the last issues in CTP, I think the plan is to do
a clean re-implementation: right now, it's code which has been
iterated on for two years, so is a bit more convoluted than it needs
to be.
Phil
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