Authors : M. Sujatha and R.S. Bhuvaneeswaran
Abstract: IEEE 802.15.4 is a WPAN (Wireless Personal Area Network) standard which is designed for short range communication. Wireless sensor networks use this standard for its communication. Most of these networks are battery operated. So, power resource has to be properly utilized to balance network performance. This standard follows blind random backoff contention mechanism which turns off the transceiver when it does not have data to transmit. Such, a design creates Hidden Node Collision (HNC) in a network which degrades network performance it terms of throughput, packet delay and power consumption. In this study, a new technique has been proposed in grouping strategy to mitigate the Hidden Node Collision (HNC) problem. Additionally, it introduces beamforming technique to conserve energy in the network. Simulations illustrates that proposed research not only avoids HNC problem but also outperforms IEEE 802.15.4 standard and previous grouping strategies.
M. Sujatha and R.S. Bhuvaneeswaran, 2014. Modified Intra-Cluster Grouping Scheme using Beamforming Technique in Standard IEEE 802.15.4 Wireless Sensor Network. Asian Journal of Information Technology, 13: 422-430.