Abstract
In the paper, we propose a reliable asynchronous image transfer protocol, RAIT. RAIT applies a double sliding window method to node-to-node transfer, with one sliding window for the receiving queue, which is used to prevent packet loss caused by communication failure between nodes, and another sliding window for the sending queue, which prevents packet loss caused by network congestion. The routing node prevents packet loss between nodes by preemptive scheduling of multiple packets for a given image. RAIT implements a double sliding window method by means of a cross-layer design between the RAIT layer, routing layer, and queue layer. We demonstrate that RAIT guarantees a higher reliability of image transmission compared to the existing protocols.
Highlights
The recent widespread use of small, inexpensive multimedia sensors such as CMOS imaging sensors and hardware improvements to wireless sensor nodes have led to the creation of wireless multimedia sensor networks (WMSNs), which are capable of acquiring multimedia content such as sound and images
While RAIT can guarantee the reliability of image transmission with a preemption scheme and double sliding windows, these schemes increase the duration of image transmission
RAIT applies a double sliding window method to node-to-node image transfer to prevent packet loss caused by network congestion
Summary
The recent widespread use of small, inexpensive multimedia sensors such as CMOS imaging sensors and hardware improvements to wireless sensor nodes have led to the creation of wireless multimedia sensor networks (WMSNs), which are capable of acquiring multimedia content such as sound and images. Existing protocols in WMSN are not designed to accommodate multimedia content These protocols are usually based on the protocols of traditional networks such as the internet, where there are frequent packet losses whenever the network becomes congested. Some research that has claimed to provide reliable packet transmission usually seeks to reduce the packet loss or error that occurs in node-to-node transmission, not end-to-end. For this reason, a new transport protocol for WMSN should be developed to facilitate the reliable transfer of large, loss-sensitive multimedia content [16,17].
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