COMPARISON OF TIME-BASED AND SMAC PROTOCOLS IN FLAT GRID WIRELESS SENSOR NETWORKS VER VARYING TRAFFIC DENSITY

Abstract

Wireless Sensor Networks (WSNs) are the networks of sensor nodes that are connected by a wireless channel.
Sensors are usually deployed in an ad hoc fashion, resulting in self organized topology. Performances of WSNs are
highly related to the Medium Access Layer (MAC) mechanism. These sensor MAC schemes are different from
traditional wireless MAC such as IEEE 802.11. In literature there are many protocols available for WSNs but SMAC is one of the most popularly and commonly used protocol for WSNs. This paper provides comprehensive
performance analysis of the existing S-MAC protocol and Time-Based protocol (TDMA) used in WSNs. The paper
presents a comparison of the performance of SMAC and TDMA on flat grid topology with a single sensor node as
the sink. Here multi-hop transmission is considered and reveals fundamental tradeoffs on throughput, energy and
latency. Simulation is done using NS2. Simulation result shows that TDMA has more energy savings, less latency
and high throughput when compared with SMAC.