“…These protocols have higher rates of collisions, overhearing and idle listening. Sensor-MAC (S-MAC) [7], timeout-MAC (T-MAC) [10], dynamic sensor-MAC (DS-MAC) [11], adaptive energy efficient-MAC (AEE-MAC) [12], International Journal of Advanced Computer Research, Vol 8 (38) synchronous receiver initiated-MAC (SRI-MAC) [13], Berkeley-MAC (B-MAC) [14], short preamble-MAC (X-MAC) [15], convergence-MAC (C-MAC) [16], receiver initiated-MAC (RI-MAC) [17] and predictive wakeup MAC (PW-MAC) [18] are typical examples of this category. We classify them into two groups synchronous and asynchronous built on the nature of their algorithms.…”