Preventing unnecessary interests retransmission in named data networking
Safa Mejri, Haifa Touati, Farouk Kamoun · 2016
Named Data Networking (NDN) is an Information-Centric Networking architecture that has recently attracted significant attention. NDN rethinks the Internet communication paradigm around the name of the data instead of its location. In Content-Oriented architectures, in-network caching enables data retrieval from different network nodes and may result in frequent data sources changes and wide RTT fluctuations during a flow. Since NDN architectures use Interest retransmission timer at the scale of network RTT estimations, this would generate erroneously premature timeouts events resulting in unnecessary Interests retransmission. In this paper, we tackle the Interest retransmission problem. We first analyze the impact of temporary caches on the number of timeouts events. Then we introduce “Source Change Notification” to address this issue. A preliminary evaluation has been conducted by means of the ndnSIM simulator. Our evaluation results show that our proposal succeeds in preventing unnecessary Interest retransmission when data providers change.