Design, implementation, and optimization of a Raptor-based content delivery protocol

When attempting to deliver contents over wireless networks in an efficient manner, the different protocols involved must deal with several sources of loss such as congestion and channel errors, which can prevent an effective message reception at the destination. Therefore, content delivery protocols must deal with these problems in the most appropriate way. In this paper we focus on the design, implementation, and optimization of RCDP, a content delivery protocol for wireless network environments based on Raptor codes. We propose different architectural and design alternatives in order to find the solution that achieves the best trade-off between throughput achieved and resource requirements under both lossy and lossless conditions. Experimental results based on a real implementation of RCDP show that parallelization strategies, together with other optimizations, are able to significantly boost performance.