Implementation and Evaluation of CYPHONIC client focusing on Sequencing mechanisms and Concurrency for packet processing

Peer-to-Peer (P2P) based direct communication among devices can enhance communication speed and reduce the burden on cloud services in service models involving distributed and cooperative processing. The authors have proposed and developed CYber PHysical Overlay Network over Internet Communication (CYPHONIC), which offers a secure communication mechanism based on a P2P model. However, the performance of conventional CYPHONIC clients is limited because they process packets in a single-threaded manner, considering the simplicity of sequential packet processing. This paper presents a redesigned implementation of the CYPHONIC client that supports multi-threaded packet processing. The new client design incorporates a novel processing scheme that emphasizes sequencing mechanisms and concurrency in packet processing, as the order of packet processing is not guaranteed in multi-threaded processing. These improvements have significantly increased end-node throughput and enabled communication delay times to remain constant even as the number of connections increases.