2010/3/14 Islam Hegazy <[email protected]>: > Hi all, > > After reading the CTP paper and understanding the implementation in TinyOS, > I conducted a numerical example to understand the behaviour of ETX. I had > the following observations: > 1) Beacon-driven link quality (BLQ) tends to increase the value of ETX, > while data-driven link quality (DLQ) tends to decrease the value of ETX.
How did you conclude this? > 2) BLQ is unidirectional from the incoming beacons, while DLQ is > bidirectional from data packets and ACKs. Yes, about the 4bitle implementation. You can look at le for something that uses beacons. > 3) BLQ is calculated for all neighbours, while DLQ is calculated for my the > next hop neighbour only. Yes. > 4) ACK is on 1-to-1 basis, which means that a node sends a single data > packet and waits for the ACK before sending a new data packet. Yes. > 5) ACK does not include the seq. number of the data packet since it is a > 1-to-1 scheme. Yes. > 6) Snoop and intercept do not update the neighbour entries in the routing > tables. Yes. They are meant to be used by applications. - om_p _______________________________________________ Tinyos-help mailing list [email protected] https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
