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
