Hi Am I correct in thinking your tinyos-2.x-contrib/ethz/snpk/tos/chips/cc2420/ setup is basically keeping a table of neighbour wake-up times for more efficient unicasts rather than trying to align their wake-up times?
I have been looking at the /ethz/snpk contrib, and also found ethz\snpk\tos\lib\net\TimeSync which looks like it's trying to align clocks (or at least the mote's view of a global clock) although it appears to expect the nodes being physically arranged by ID? Sort of similar to FTSP approach? Regards, Ben > -----Original Message----- > From: Roman Lim [mailto:[EMAIL PROTECTED] > Sent: 20 February 2008 09:58 > To: Murray, Ben > Cc: [email protected]; 'Brian Jump' > Subject: Re: [Tinyos-help] LPL syncronization > > > the sensor network platform kit (SNPK) has a synchronous LPL > implementation for CC2420. > you can download it at > http://tinyos.cvs.sourceforge.net/tinyos/tinyos-2.x-contrib/et > hz/snpk/tos/chips/cc2420/ > it is based on the most recent tos2 cc2420 radio stack > its actually developed for tmotes, micaz is not tested. > > roman > > 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_contribut ed_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? > > **************************************************************************** *** > Please consider the environment before printing this email. > **************************************************************************** *** > This email and any files transmitted with it are intended solely for the use of > the individual or entity to whom they are addressed and may not be divulged to > any third party without the express permission of the originator. Any views > expressed in this message are those of the individual sender, except where the > sender specifically states them to be the views of Thales Research & Technology > (UK) Limited. > **************************************************************************** *** > > _______________________________________________ > Tinyos-help mailing list > [email protected] > https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help _______________________________________________ Tinyos-help mailing list [email protected] https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
