Congestion Control in Heterogeneous Wireless Sensor Networks for High-Quality Data Transmission

Abstract

Heterogeneous wireless sensor network (HTWSN) is the most preferable and demanding technology for military applications because of low cost and high performance in terms of high-quality data transmission with low end-to-end delay. HTWSN can be established with variable-configured sensor nodes for detection and monitoring the complex and multitasking events efficiently within the network. But congestion is the most serious issue which may cause high packet loss; increase the number of retransmissions, frequent link failure, and node failure; lower the network life time by increasing the energy consumption; and lower the throughput. Most of existing congestion control protocols are developed for homogeneous wireless sensor network which may not help to achieve high throughput for HTWSN. So we have proposed a new congestion control protocol (CCP) for HTWSNs which can estimate the congestion control degree (CCD) at each node prior to identify the future congested nodes in the network. Accordingly, CCP can enable its load balancing technique effectively and balance the data traffic between the future congested nodes and source node to achieve high-quality data transmission in HTWSN.