SAID: A Control Protocol for Scalable and Adaptive Information Dissemination in ICN

Abstract

Information dissemination applications (video, news, social media, etc.) with large number of receivers need to be efficient but also have limited loss tolerance. The Information Centric Networks (ICN) paradigm offers an alternative approach for reliably delivering data by naming content and exploiting data available at any intermediate point (e.g., caches). However, receivers are often heterogeneous, with widely varying receive rates. When using existing ICN congestion control mechanisms with in-sequence delivery, a particularly thorny problem of receivers going out-of-synch results in inefficiency and unfairness with heterogeneous receivers. We argue that separating reliability from congestion control leads to more scalable, efficient and fair data dissemination, and propose SAID, a control protocol for Scalable and Adaptive Information Dissemination in ICN. To maximize the amount of data transmitted at the first attempt, receivers request any next packet (ANP) of a flow instead of next-in-sequence packet, independent of the provider’s transmit rate. This allows providers to transmit at an application-efficient rate, without being limited by the slower receivers. SAID ensures reliable delivery to all receivers eventually, by cooperative repair, while preserving privacy without unduly trusting other receivers.attempt, receivers request any packet of a flow instead of next-in-sequence packet, independent from the transmitting rate of the provider. This also allows the provider send data at an application-efficient rate without being affected by the slower receivers. SAID ensures all receivers successfully obtain all the packets eventually by cooperative repair. Exploiting ICN capabilities, we still assure reliability and preserve privacy without unduly trusting other receivers.