I'm currently developing a wireless sensor network project with Contiki-NG. However, I need to add Radio Duty Cycling feature to save energy. It was possible to add RDC in Contiki using contiki mac. It seems to be Contiki-ng does not have such thing as contiki mac. All I can see inside contiki-ng/os/net/mac/ are CSMA MAC, BLE MAC, TSCH MAC, NullMAC and some shared MAC components. Is there any way we can use RDC on Contiki-NG?
You can use TSCH if you need duty cycling: TSCH does it on its own.
Or you can togggle CSMA on and off from the application code.