On Fri, Sep 16, 2011 at 07:49:58AM -0700, George Nychis wrote: > Makes sense. Even if ZigBee were to back off to 802.11, it's likely to create > unfairness problems where it will wait for 802.11, begin transmitting, and > still get loss since 802.11 will not be able to sense it. > > I am working on coexistence problems for my research, and I am just poking > around what exactly the interference problem between 802.11 and ZigBee is > like. > > Here are some results I took using two EconoTag and an 802.11n link: > http://www.ece.cmu.edu/~gnychis/wifi_zigbee_loss.pdf
Very cool! You might also plot the LQI of the received packets. Could be interesting. > Without the 802.11n link active, loss is minimal. With it active, loss can be > *very* high. I measured loss rate over a 50ms window, so as to monitor it > over > time. (using transmitted packets with sequential sequence numbers to check for > lost packets). Do you know what the reciprocal effect on 802.11n is? > > This is using modified rf-rxtest and rf-txtest code. I don't think any of the > CCA code is active in this. That is correct. No CCA is done in those programs. -Mar. ------------------------------------------------------------------------------ BlackBerry® DevCon Americas, Oct. 18-20, San Francisco, CA http://p.sf.net/sfu/rim-devcon-copy2 _______________________________________________ Linux-zigbee-devel mailing list Linux-zigbee-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-zigbee-devel
