DDRC : Dynamic Data Rate for Clustered IEEE 802.15.4 Networks

Abstract

-Recently, Low Rate-Wireless Personal Area Networks are widely used in many different domains. But it faces a number of problems due to its design constraints of short range, low data rate, and power consumption. In this paper, we proposed an enhanced protocol for the congestion, and packet dropping problems. This protocol allows a network device to regulate its data rate dynamically using Congestion Notification Field (CNF) in beacon frame based on current network buffer status. For scalability and data rate control, the quantization parameter is used to maintain the target output rate. Along with this scalability is considered by modifying encoding parameters using Particle Swarm Optimization (PSO) to balance the target output rate for supporting high data rate. Thus we proposed Dynamic Data Rate for Clustered IEEE 802.15.4 Networks (DDRC). Consequently, we used NS-2 to simulate the proposed model for MAC layer protocol in wireless LANs. Finally, we test and evaluate DDRC to perform a comparative study between it and the other based adaptive data rate system. The results of the study indicate that this model enhance the Constant Bit Rate (CBR) traffic (Delay, Delivery Ratio, Packet Drop, Energy, and Throughput).