A Transmission Method to Guarantee QoS Parameters in Wireless Sensor Network

Due to the energy constraint and high packet loss rate, energy-efficient and reliable data transmission are crucial issues in WSNs. In order to increase the network reliability and throughput, multipath forwarding is used in many applications. However because of using multiple paths between source and destination, the multipath forwarding mechanism increases the network overhead. By splitting the original messages and forwarding each sub-packet through multipath routing protocols energy consumption and network overhead can be reduced. This paper proposed a flexible recovery mechanism which increase reliability and minimize both energy consumption and delay. The proposed scheme caches sub-packets at some special intermediate nodes and retransmits from these nodes instead of source node whenever it is necessary. Performance evaluations of sub-packet caching (SPC) demonstrate that using multipath forwarding with caching data can effectively increase the reliability and reduce the energy consumption and latency.

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