Commit graph

9 commits

Author SHA1 Message Date
Adam Dunkels 0cd2f48d6e Added NULL pointer guards 2012-11-22 11:55:01 +01:00
Adam Dunkels 944537fccf Removed all old RCS tags in the Contiki source tree. Those RCS tags are not used any more, as we are now using git to manage the Contiki source tree 2012-10-26 15:54:49 +02:00
Lionel Debroux 5cb49e8b07 Several compiler warning fixes:
* msp430: fix "implicit declaration of function" warnings in clock.c, by including watchdog.h;
     * sky: fix a couple pointer target signedness warnings;
     * core: fix several signed/unsigned comparison warnings;
     * framer-802154: "const static" -> "static const" to fix compiler warnings;
     * core: comment or remove unused variables and function definitions.

Signed-off-by: Lionel Debroux <lionel_debroux@yahoo.fr>
Signed-off-by: Mariano Alvira <mar@devl.org>
2011-02-20 19:28:14 -05:00
adamdunkels 90dc0ceebf Replaced default link estimator with an exponential weighted moving average, which reduces memory consumption per neighbor. 2011-01-09 21:14:22 +00:00
adamdunkels 5eb4a0fe8d Rewrote the initial link estimate logic: link estimates are now
computed only over the actual samples, not over the entire
buffer. Also, the initial link estimate is much more conservative now
(16 transmissions) to favor links that have been probed, and which
therefore are likely to have better ETXs.
2010-10-11 23:34:02 +00:00
adamdunkels b23a364397 rtmetric values should always be computed as 16-bit values 2010-10-03 20:06:25 +00:00
adamdunkels 46b2451969 Made the initial link estimate explicit 2010-09-22 22:03:21 +00:00
adamdunkels 591766e663 Significant improvements to the Collect protocol:
* Loop detection and untangling. Now uses in-band loop detection that
  works.

* Link quality estimation. Now starts with a conservative /
  pessimistic estimate for new links.

* Retransmissions. MAC layer and network layer retransmissions are now
  decoupled.

* Loss handling. Deals better with losses now.

* Concurrent applications. Each connection now maintains its own
  neighbor table with separated cost to sink estimates for each
  connection.
2010-09-13 13:28:14 +00:00
adamdunkels 4e0744954a Rewrite of important parts of the Collect logic: link estimation
calculation and parent selection.  This fixes a severe bug that caused
loops when packets were erroneously retransmitted due to ACK loss.
2010-09-08 19:21:45 +00:00