[Tinyos-help] LPL syncronization

Roman Lim rlim at ee.ethz.ch
Wed Feb 20 01:57:43 PST 2008

the sensor network platform kit (SNPK) has a synchronous LPL 
implementation for CC2420.
you can download it at
it is based on the most recent tos2 cc2420 radio stack
its actually developed for tmotes, micaz is not tested.


Murray, Ben wrote:
> as far as I am aware LPL is asynchronous. The TEP is here:
> http://www.tinyos.net/tinyos-2.x/doc/html/tep105.html
> and tutorials are here:
> http://www.tinyos.net/tinyos-2.x/doc/html/tutorial/
> I have, however, read in the contrib about "synchronous" LPL (rincon)
> http://docs.tinyos.net/index.php/TinyOS_2.x_index_of_contributed_code#Rincon
> _Enhanced_CC2420_Radio_Stack
> ...it appears to use a system of recording neighbour-schedules and times its
> preambles such that they start just before it thinks the intended recipient
> is to wake up, thus reducing the length of the preamble required (recipients
> can ACK a unicast to stop the senders preamble continuing longer than
> necessary).
> If you find anything else useful wrt LPL-style synchronous stuff please
> share!
> Cheers
> -Ben
>> I have recently started working with TinyOS on the micaZ motes.  I am 
>> trying to implement the Low Power Listening that comes with 
>> TinyOS.  I 
>> just have a few questions on how it works.  What is the best way to 
>> determine the duty cycle for the LPL.  How do the motes stay 
>> synchronized? 
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