Energy Efficient Hybrid MAC Protocol for Cluster-Based Wireless Sensor Network

Wireless sensor networks consist of large number of nodes often battery operated, which have ad hoc topology and variable traffic rates. The medium access control (MAC) protocol designed for the network must be stable and should consume less energy. This paper presents a novel hybrid MAC protocol that uses the information of clusters to divide the MAC layer functionality into two types, namely, bit map assisted (BMA) protocol and nanoMAC protocol for the intra and inter-cluster communication respectively. Performance of the hybrid MAC protocol is evaluated in terms of energy, delay and offered traffic load and compared with the conventional MAC schemes. Simulation results show that the hybrid MAC protocol considerably reduces the energy consumption and delay to maximize the lifetime of the sensor network.

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