This sounds great. Are you moving it forward into NesC so that it can be widely used?
D. Wei Ye wrote: > We have recently developed a comm stack on Mica motes at USC/ISI and UCLA. > It has some useful features that people might want to use or take a look. > > Following is a highlight of the new features in our stack. > > 1) Flexible architecture that allows people to easily build different > components at different layers. The nested header structure allows each > component to freely define its own packet formats and add its header > fields in packets from upper layers. > > 2) Clean separation of MAC and the physical layer (PHY) allows different > MACs can be built on the same PHY. The PHY can reliably and efficiently > handle variable length packets up to 250 bytes, and is robust to > back-to-back packet transmission. > > > 3) S-MAC provides energy-efficient operations on radio > - Low-duty-cycle operation on radio -- trade off latency vs. energy > - Overhearing avoidance -- sleep when neighbors are talking > > The measurement in S-MAC paper shows that a MAC protocol without any > sleeping consumes 2 - 6 times more energy on radio than S-MAC in > different traffic conditions. > > 4) Abundant features in unicast provided by S-MAC (similar to 802.11). > - RTS/CTS/Data/ACK -- Robust to collisions, hidden terminal problem, > data packet losses > - Fragmentation support for long messages > > We compared robustness of our stack and Berkeley's stack (before the > nesC release) and found similar reliability out to the ranges of 18m > (with matched whip antennas on 400MHz radios in the hallway of ISI > building). The SEC/DED encoding allows the UCB stack to extend the > transmission range by 2m. When ISI stack works with SEC/DED encoding, it > obtains the same transmission range as UCB stack. The physical layer of > ISI stack can work with any of these codes: Manchester, SEC/DED and 4B/6B. > > For details of our stack design, implementation, functionality comparison > with Berkeley's stack and some performance measurement, you can look at > the documentation at > > http://www.isi.edu/scadds/papers/commstack.pdf > > For the performance on energy savings, you can look at the S-MAC paper at > > http://www.isi.edu/scadds/papers/smac_infocom.pdf > > Thanks, > -Wei > > _______________________________________________ > Tinyos mailing list > [EMAIL PROTECTED] > http://mail.Millennium.Berkeley.EDU/mailman/listinfo/tinyos _______________________________________________ Tinyos-users mailing list [EMAIL PROTECTED] http://mail.Millennium.Berkeley.EDU/mailman/listinfo/tinyos-users
