“…All the self-organizing MAC protocols like Aloha with PS, B-MAC (Berkeley Medium Access Control [3], S-MAC (MAC protocol designed for WSN [4]), X-MAC (a short preamble MAC protocol by B u e t t n e r et al [5]), C-MAC (MAC layer protocol using Convergent Packet Forwarding by L i u et al [6]) , MX-MAC (a small modification of X-MAC, where the data itself is sent repeatedly until it gets an acknowledgement from the receiver), Mix-MAC (chooses the efficient schedule from a group of compatible MAC schedules), WiseMAC (designed for Infrastructure Wireless Sensor Network by E l-H o i y d i and D e c o t i g n i e [7]), SpeckMAC [8], Z-MAC (Zebra MAC by R h e e et al [9]) and S-MACL [10] are based either on Preamble sampling or adaptable duty cycle based or by using synchronization information. The TDMA based protocols like LEACH, DECSA (not purely TDMA [11]), HM-VMPC [12], MC-LMAC [13] and EA-TDMA [14] are slot-based and there, by interference, can be avoided.…”