ZigBee IEEE 802.15.4 - Active Phase
Channel: Mario Neugebauer
Date: 2021-05-31

This video explains the contention access period (CAP) of the standard IEEE 802.15.4. This mode is maintained during the active phase and partially enables the reduction of collissions during communication. Though, if hidden terminals are present, the CAP does not have means to detect. Rather, missing messages for acknowledgement would then signal that something went wrong.