giomba
/
nes-proj
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

CSMA for Cooja motes: increase backoff_period

This commit is contained in:
Simon Duquennoy 2018-02-24 15:35:58 -08:00
parent 61880704b1
commit d526323ce2
1 changed files with 6 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
os/net/mac/csma/csma-output.c
View File

@ -154,9 +154,15 @@ neighbor_queue_from_addr(const linkaddr_t *addr)
static clock_time_t
backoff_period(void)
{
#if CONTIKI_TARGET_COOJA
/* Increase normal value by 20 to compensate for the coarse-grained
radio medium with Cooja motes */
return MAX(20 * CLOCK_SECOND / 3125, 1);
#else /* CONTIKI_TARGET_COOJA */
/* Use the default in IEEE 802.15.4: aUnitBackoffPeriod which is
* 20 symbols i.e. 320 usec. That is, 1/3125 second. */
return MAX(CLOCK_SECOND / 3125, 1);
#endif /* CONTIKI_TARGET_COOJA */
}
/*---------------------------------------------------------------------------*/
static int