Improving TCP performance over Wireless Networks: Wireless Networks violate many assumptions made by TCP causing degraded end-to-end performance. In wired networks, packet losses are caused only because of congestion whereas in wireless, packet loss may be due to high bit error rate, hand-off, etc. The performance of TCP is degraded as it cannot differentiate packet losses caused by congestion from losses induced by wireless links. The research work Cross layer approach is proposed to enhance TCP performance so that wireless networks will provide more services that are provided in the wired internet, and will gradually carry the traffic similar to that of the wired networks in future.
Extending network lifetime in wireless sensor networks: Wireless sensor networks(WSN) is a collection of sensor nodes that perform autonomous sensing to from the integrated network which sends useful information to a base station or sink. Main constraint or limitation in WSN is limited energy, since sensor nodes are operated by onboard battery. Hence many low power consumption techniques had been evolved so as to reduce the energy consumption. This research aims to extend the network lifetime of sensor nodes.
Inter-cluster traffic avoidance for Large Scale Sensor Networks: In robust energy aware clustering protocol architecture for large-scale wireless networks, clustering can utilize bandwidth and energy efficiently by taking advantage of spatial separation and traffic locality. A suitable solution for inter-cluster traffic and optimization of the link capacity will be an ideal solution to utilize the bandwidth efficiently. An interesting extension is to optimally determine the link capacity between the master nodes and BS according to specific aggregation function so that the data traffic can fully exploit the available bandwidth and network architecture.