Yes, that's exactly what I understood. So, it's wrong to say that applying different Group_ID allows collision avoidance but the correct sentence is to say that applying different Group_ID allows packet ignoring.
Thank's Michael. Regards, m_benj 2009/5/16, Michael Schippling <sc...@santafe.edu>: > The general idea is that the radio layers ignore messages > tagged with a gourpID that doesn't match the one with which the > code was compiled. The radio bandwidth is still used as only one > mote, of any group on that channel, can transmit at a time. > > Another way to avoid overlap is to assign different radio channels > at compile time. Then it's likely that they don't talk to each other > at all. > > MS > > Maisa Ben Jamaa wrote: >> Hi. >> >> I saw in some WSN courses that selecting an Active Message GroupID leads >> to avoid packet collisions. >> How could this be done? I didn't much realize the influence of a GroupID >> packet field on a collision avoidance mechanism. >> >> Thanks for any help. >> >> >> Regards, >> m_benj >> >> >> >> ------------------------------------------------------------------------ >> >> _______________________________________________ >> Tinyos-help mailing list >> Tinyos-help@millennium.berkeley.edu >> https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help > > -- > Platform: WinXP/Cygwin > TinyOS version: 1.x, Boomerang > Programmer: MIB510 > Device(s): Mica2, MicaZ, Tmote > Sensor board: homebrew > > _______________________________________________ Tinyos-help mailing list Tinyos-help@millennium.berkeley.edu https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
