Hi Guys! On the RF230 we perform an instantaneous RSSI based CCA check, but you can enable the hardware CCA which takes around 16 microseconds.
Miklos On Thu, Dec 9, 2010 at 7:55 AM, Urs Hunkeler <urs.hunke...@epfl.ch> wrote: > From my tests on a TelosB (CC2420 radio) it varies linearly between 1ms > and 10ms (when the channel is free, in principle the radio is already in > receive mode while the message is being copied to the radio's memory, > but I don't think this is used as the CCA). The duration on an Iris mote > (RF230 radio) is shorter, but I haven't measured the details. > > The duration of the CCA is definitely configured by TinyOS, as I managed > to shorten it. You might have to dig into the lower levels of the radio > interface. > > Cheers, > Urs > > > > On 12/08/2010 10:46 PM, TheMrOrange wrote: >> from my tests cc2420 is in rx mode for 8msec if the channel is empty >> >> Davide >> >> On 08/dic/10, at 20:53, Eric Decker wrote: >> >>> >>> >>> On Wed, Dec 8, 2010 at 12:27 PM, wasif masood <rwmas...@gmail.com >>> <mailto:rwmas...@gmail.com>> wrote: >>> >>> >>> Hi all, >>> >>> can anyone tell me how long does a sender sense(in msec) the >>> channel if I use CCA enabled transmission? is this mention anywhere? >>> >>> >>> I think that is buried down in the radio h/w but I am not sure. You >>> might want to take a look at the h/w specs for the radio you are >>> using. >>> >>> eric > _______________________________________________ > Tinyos-help mailing list > Tinyos-help@millennium.berkeley.edu > https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help > _______________________________________________ Tinyos-help mailing list Tinyos-help@millennium.berkeley.edu https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
