Reining in Redundant Traffic through Adaptive Duplicate Suppression in Multi-Access NDN Networks

Named Data Networking (NDN) provides native support for multi-party communication. However, the current NDN forwarder lacks a duplicate suppression mechanism for multicasting in a multi-access network, potentially leading to network congestion and significant degradation in overall packet delivery performance. In this paper, we introduce Adaptive Duplicate Suppression (ADS) for one-hop multicasting in multi-access NDN networks. ADS utilizes the duplicate count per Interest and Data name observed in the network to dynamically adjust the suppression time that a node waits before forwarding a packet. We have implemented ADS in the NDN forwarding daemon (NFD) and assessed its performance using Mini-NDN. Our evaluation demonstrates that ADS can effectively reduce redundant network traffic under various network conditions, resulting in significantly improved application goodput and reduced transfer times.