• s anuradha
• Dr. D. Sreenivasa Rao

The efficient Data transmission is an important task in WSNs along with environment monitoring. Most of WSNs are deployed in the hostile environments where manual intervention is less possible. So the data generated by these WSNs are sensitive data and needed to be transmitted immediately for further actions. Also, due to hostile environments, where providing constant power supply is a difficult task, these sensor nodes have to be energy efficient in order to prolong the network lifetime. The packet setting up would play a crucial part in lessening end-to-end transmission delay of data. This would support in decreasing sensors consumption of energy, hence extends the lifetime of the WSN (wireless sensor network). There are several traditional packet scheduling algorithms with different characteristics. But most of these scheduling algorithms schedule the data transmission in FIRST COME FIRST SERVE basis. Several packets might have to wait for a long duration as the outcome & this would lead to the expiration of packet. These results in long end-to end transmission delay, high energy consumption, and data loss. This nature affects the QoS of the entire network. Here we propose an Efficient Priority Based Packet Scheduling Scheme (EPBS), which schedule the data transmission based on packet priority. Our proposed scheme maintains three levels of queues such as HPQ (High Priority queue), LPQ (Low Priority queue) and NPQ (Non- Priority queue). Our EPBS scheme assigns priority to each data packets and allocates them in appropriate queues. The high priority data are allocated to HPQ, low priority packets are allocated with LPQ and the normal data are loaded with NPQ. This allocation reduces the tradeoff between priority and fairness and reduces the waiting time of the high priority data packets, which improves the QoS of the network. Our packet scheduling scheme which has been proposed would outperform the schemes that are conventional in terms of average data waiting duration as well as end-to-end delay of transmission & it also would decrease the consumption of sensor energy.

Routing, WSN, Scheduling policy, Clustering, Transmission Delay, Priority scheduling, Energy efficient Protocol, NS-2.

"Efficient Priority Based Scheduling Scheme with Multi Sink Infrastructure in Heterogeneous Wireless Sensor Networks", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 12, page no.354-360, December 2019, Available :http://www.jetir.org/papers/JETIR1908518.pdf

"Efficient Priority Based Scheduling Scheme with Multi Sink Infrastructure in Heterogeneous Wireless Sensor Networks", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 12, page no. pp354-360, December 2019, Available at : http://www.jetir.org/papers/JETIR1908518.pdf