earticle

영어

Transmission errors are inherent in wireless communications because of the instability of wireless channels resulting due to channel fading, time - frequency coherence, inter-band interference, etc, and thus receiving unreliable message packet. This necessitates the retransmission of packet which further results into extra processing and increased energy consumption of the sensor nodes.
In this paper, we propose a new approach of an energy - efficient transmission error recovery algorithm for wireless sensor networks. In the proposed methodology, the data packet is divided into small sub - packets and retransmission is done for only corrupted portion of the sub - packets. The algorithm also helps in determining optimum size of the sub-packet. These results into minimum battery power requirement for the sensor nodes and increased lifespan of the sensor network. The results show that more than 30% of the power savings can be achieved by implementing proposed system as compared to conventional retransmission of complete packet.