Aiming at triple hidden terminal problems in wireless sensor networks
an adaptive duty cycle based multi-channel MAC protocol was proposed
called MCR.MCR efficiently handled triple hidden terminal problems with multiple channel reservation.By minimizing the lower bound of average times of channel switching in MCR
the optimal duty cycle in theoretical analysis was obtained.To investigate values of multiple channel reservation and dynamic duty cycling in MCR
extensive simulation and real testbed experiments were conducted.The results show that compared with other protocols
when the number of channels is larger or loads are heavy
M-cube improves throughput and energy effi-ciency significantly.