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RPL: more robust configuration of mrhof in the squared ETX case

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Simon Duquennoy 2016-06-03 12:51:39 +02:00 committed by Simon Duquennoy
parent e6cd029090
commit 8ae00caea8
1 changed files with 11 additions and 4 deletions
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15
core/net/rpl/rpl-mrhof.c
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@ -70,16 +70,23 @@
#define RPL_MRHOF_SQUARED_ETX 0 #define RPL_MRHOF_SQUARED_ETX 0
#endif /* RPL_MRHOF_CONF_SQUARED_ETX */ #endif /* RPL_MRHOF_CONF_SQUARED_ETX */
#if !RPL_MRHOF_SQUARED_ETX
/* Configuration parameters of RFC6719. Reject parents that have a higher /* Configuration parameters of RFC6719. Reject parents that have a higher
* link metric than the following. The default value is 512 but we use 1024. */ * link metric than the following. The default value is 512 but we use 1024. */
#define MAX_LINK_METRIC 1024 /* Eq ETX of 8 */ #define MAX_LINK_METRIC 1024 /* Eq ETX of 8 */
/* Reject parents that have a higher path cost than the following. */
#define MAX_PATH_COST 32768 /* Eq path ETX of 256 */
/* Hysteresis of MRHOF: the rank must differ more than PARENT_SWITCH_THRESHOLD_DIV /* Hysteresis of MRHOF: the rank must differ more than PARENT_SWITCH_THRESHOLD_DIV
* in order to switch preferred parent. Default in RFC6719: 192, eq ETX of 1.5. * in order to switch preferred parent. Default in RFC6719: 192, eq ETX of 1.5.
* We use a more aggressive setting: 96, eq ETX of 0.75. * We use a more aggressive setting: 96, eq ETX of 0.75.
*/ */
#define PARENT_SWITCH_THRESHOLD 96 #define PARENT_SWITCH_THRESHOLD 96 /* Eq ETX of 0.75 */
#else /* !RPL_MRHOF_SQUARED_ETX */
#define MAX_LINK_METRIC 2048 /* Eq ETX of 4 */
#define PARENT_SWITCH_THRESHOLD 160 /* Eq ETX of 1.25 (results in a churn comparable
to the threshold of 96 in the non-squared case) */
#endif /* !RPL_MRHOF_SQUARED_ETX */
/* Reject parents that have a higher path cost than the following. */
#define MAX_PATH_COST 32768 /* Eq path ETX of 256 */
/*---------------------------------------------------------------------------*/ /*---------------------------------------------------------------------------*/
static void static void