A Novel Grouping Mechanism for DSMEMAC Mode

IEEE 802.15.4e introduces deterministic and Synchronous multi-channel extension (DSME) MAC mode to provide deterministic performance. To do so, the super frame structure is divided into multiple contention access slots and contention free slots. However, the standard does not specify the number of devices to access each DSME slots. In this article, we exploit fuzzy logic to group the devices based on the nature of traffic and vary the duration of DSME slot according to the traffic requirements of the devices. Further, we analytically evaluate the collision probability, throughput, energy consumption and delay of DSME mechanism. Results show that the optimal amount of DSME slots associated with fuzzy logic significantly improves efficiency and reduces energy usage.. Finally, extensive simulations are conducted using ns-3 to validate the analytical results.