5.1.7 Parent Loss Detection and Rejoin to Another Parent

This section describes the power profile of Mi-Wi Mesh sleeping end device while it detects a parent loss and scans for a new parent. The following figure illustrates the profile captured during a node trying to transmit indirect data request to its parent and not receiving a MAC ACK for the same. As a result, the sleeping end device retries three times. After failing to reach the parent for ED_LINK_FAILURE_ATTEMPTS, the sleeping end device detects a parent loss and transmits the beacon request to scan for any nearby nodes for joining to the network. Post detection of link failure, the profile is identical to as observed in section Beacon Request and Scan Duration. For more details, refer to Beacon Request and Scan Duration
Figure 5-16. SAM R30 XPro
Figure 5-17. SAM R30 Module XPro
Table 5-13. Parameters
ParametersSAM R30 XProSAM R30 Module XPro
Total duration (ms)91092.5
Average current (mA)2.0711.28
Peak current (mA)27.0626.26
Total charge (mA*ms)1883.71043
Note: The duration difference in this table is due to the fact that the end device in the SAM R30 XPro took longer to wake up from sleep and detect the parent loss to send the data request, as compared to immediate wake-up, parent loss detect and indirect data request in the SAM R30 Module XPro.
Figure 5-18. SAM R30 XPro
Figure 5-19. SAM R30 Module XPro
Table 5-14. Parameters
ParametersSAM R30 XProSAM R30 Module XPro
Total duration (ms)2482024559
Average current (mA)10.689.992
Peak current (mA)26.7124.43
Total charge (mA*ms)265077.6245393.53