A Protocol for Data Discovery and Retrieval in Content-Centric and Delay-Tolerant Networks

Content-Centric Networks (CCN) has emerged as an innovative paradigm that modifies the traditional host-centric and address-based communication model. Its application to delay tolerant network scenarios is known to positively impact some important network metrics and characteristics, such as delay and intermittence. Thus, we justify the feasibility of this combination and present DIRESC, a protocol for selection of message relays for data announcement, discovery and retrieval through a scheme of social cooperation between nodes. We implement our proposal using the ONE simulator and compared its performance against CCN broadcasting, PIFP and STCR protocols. Our results show that DIRESC is able to decrease at least 73.3% of data recovery delay and a gain of at least 9.88% in satisfaction of content requests over PIFP. Thus, we present DIRESC as a promising solution for accelerating the process of obtaining data in this type of network.