There is a MAC, but it is not the 802.15.4 MAC, but a very simple one called XMAC. It does not require any extra fields in the message. Miklos
On Tue, Aug 11, 2009 at 4:31 PM, David Li<[email protected]> wrote: > Hi Miklos, > Thanks. > Maybe this is my ignorance. I am curious why there is no MAC in the TinyOS2 > implementation. > > David > > On Mon, Aug 10, 2009 at 3:22 PM, Miklos Maroti <[email protected]> > wrote: >> >> Hi David, >> >> On Mon, Aug 10, 2009 at 9:44 PM, David Li<[email protected]> wrote: >> > Hi, >> > >> > I would like to know the precise packet overhead bytes (802.15.4 + MAC) >> > in a >> > Iris/RF230 node. It seems 802.15.4 header and footer are defined in >> > tos/chips/rf230/ieee154packet.h and total count is 13 bytes for a >> > T-Frame. >> >> Correct. >> >> > Is there anything else in MAC and others? >> >> There is no other overhead, at least for the air format. Of course the >> message_t has some overhead to store the metadata of the packet. >> >> Miklos > > > _______________________________________________ > Tinyos-help mailing list > [email protected] > https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help > _______________________________________________ Tinyos-help mailing list [email protected] https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
