Channel 11 is not too bad either, no? Miklos
On Wed, Jan 14, 2009 at 2:05 AM, Razvan Musaloiu-E. <[email protected]> wrote: > Hi! > > The attachment was a little above the limit of the mailling list. Here is a > link to it: > http://farm4.static.flickr.com/3416/3194852987_7252787b60_o.png > > Sorry for duplicates! > Razvan ME > > On Tue, 13 Jan 2009, Razvan Musaloiu-E. wrote: > >> Hi! >> >> On Wed, 14 Jan 2009, Miklos Maroti wrote: >> >>>> Can you give a little more information about how the radio communication >>>> was bad? Did you notice an increase of lossrate? Change in RSSI or LQI? >>> >>> The noise floor was much higher, CRC errors happened a lot, I even got >>> random messages passing the CRC checks. >>> >> >> I attached a boxplot graph with the RSSI and ED collected by Yin Chen in >> our lab (we have WiFi APs on the WiFi channels 3, 8 and 11) for an Iris >> mote. For each Zigbee channel about 2000 samples were collected. We haven't >> test again the CC2420 but an older graph shows similar patters: top graph >> from figure 3 from page 5 from here: >> http://cs.jhu.edu/~razvanm/ijsnet2008interference.pdf >> The overlapping between WiFi channels and Zigbee channels is depicted in >> figure 1 from page 3. >> >> So the conclusion would be that channel 26 is indeed the farthest away >> from the WiFi. It would be nice if we can compare with traces from other >> places. >> >> -- >> Razvan ME > _______________________________________________ Tinyos-help mailing list [email protected] https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
