-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi all,
I've been looking into the TinyOS 2.1.1 CTP (lib/net/ctp) and Link Estimator (lib/net/le) implementation in order to understand how ETX values are calculated. If I understand it correctly, the ETX stored in both CTP routing and data packets are actually EETX values as fixed-point real numbers with a precision of tenths: a value of 15 represents an EETX of 1.5 or ETX of 2.5 (EETX = ETX - 1), respectively. If it is not EETX, I wouldn't be able to explain values < 10 (which I've been seeing in packets a lot). Now, assuming the above is true, is it still sufficient to assume a node is a root if it reports a value of 0? This would only mean that there a no retransmissions needed to successfully transmit a packet to the root (EETX = 0, ETX = 1) and would be feasible for any node, right? Best regards, Matthias - -- Matthias Schwamborn University of Bonn Tel.: +49-228-73-54203 Institute of Computer Science 4 Fax: +49-228-73-4571 Friedrich-Ebert-Allee 144 E-mail: schwamb...@cs.uni-bonn.de D-53113 Bonn, Germany http://net.cs.uni-bonn.de/ms/ -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAk2AsocACgkQjmPUsaX58S8CNACfZLHFZFbpDuyLGTkRe7ef76nW ZIIAoIq676B0ew3pL4vJwcxoscJ1lDx/ =Kx7A -----END PGP SIGNATURE----- _______________________________________________ Tinyos-help mailing list Tinyos-help@millennium.berkeley.edu https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
