A Low Delay Cross-Layer MAC Protocol for k-Covered Event Driven Wireless Sensor Networks
Ripudaman Singh, Brijesh K. Rai, Sanjay Kumar Bose · IEEE Sensors Letters · 2017
In general, in k-covered wireless sensor networks (WSNs), whenever an event occurs, M (≥k) sensor nodes, lying in the communication range (CR) of each other, have data packets to send in the same cycle. In the existing crosslayer contention-based synchronous MAC protocols, very few nodes can forward their data packet in the same cycle when M nodes, with data packets to send, lie in the CR of one another. This results in a drastic increase in the end-to-end transmission delay (E2ETD) with increasing M. In this article, we propose a low delay, cross-layer contention-based synchronous MAC (LDCMAC) protocol for event driven WSNs. LDMAC increases the number of nodes that can forward their data packet in the same cycle when M nodes, with data packet to send, lie in the CR of one another. We evaluate LDCMAC through NS-2.35 simulations and compare its performance with the CL-MAC protocol. Results suggest that LDCMAC significantly outperforms CL-MAC in terms of E2ETD and packet delivery ratio (PDR).