Dinh Ngoc-Thanh, Kim Younghan
School of Electronic Engineering, Soongsil University, Seoul 06978, Korea.
Sensors (Basel). 2021 Nov 16;21(22):7607. doi: 10.3390/s21227607.
One of the main advantages of information-centric networking (ICN) is that a requested piece of content can be retrieved from a content store (CS) at any intermediate node, instead of its original content producer. In existing ICN designs, nodes forward Interest packets mainly based on forwarding information base (FIB). FIB is constructed from name prefixes registered by content producers with a list of next hops to the name prefixes. The ICN forwarding engine uses those information to forward Interest packets towards corresponding content producers. CS information of a node is currently used only for checking the availability of cached content objects at the node and is not considered in the data plane of existing ICN forwarding mechanisms. This paper highlights the importance of CS information in an ICN forwarding mechanism and enables neighbor CS information in the data plane to improve the cache hit ratio and forwarding efficiency, especially for resource-constraint Internet of Things (IoT). We propose an efficient CS-based forwarding scheme for IoT. The proposed forwarding scheme exploits CS information of neighbors to find efficient routes to forward Interest packets toward nearby nodes with corresponding cached content. For that, we carefully design an efficient way for CS information sharing using counting bloom filter. We implement the proposed scheme and compare with state-of-the-art ICN forwarding schemes in IoT. Experimental results indicate that the proposed forwarding scheme achieves a significant improvement in terms of cache hit ratio, energy efficiency, content retrieval latency, and response rate.
以信息为中心的网络（ICN）的主要优势之一是，请求的内容片段可以在任何中间节点从内容存储（CS）中检索，而不是从其原始内容生产者处获取。在现有的ICN设计中，节点主要基于转发信息库（FIB）转发兴趣包。FIB由内容生产者注册的名称前缀以及到这些名称前缀的下一跳列表构建而成。ICN转发引擎利用这些信息将兴趣包转发给相应的内容生产者。目前，节点的CS信息仅用于检查该节点缓存内容对象的可用性，在现有ICN转发机制的数据平面中并未被考虑。本文强调了CS信息在ICN转发机制中的重要性，并在数据平面启用邻居CS信息以提高缓存命中率和转发效率，特别是对于资源受限的物联网（IoT）。我们为物联网提出了一种高效的基于CS的转发方案。所提出的转发方案利用邻居的CS信息来找到高效的路由，将兴趣包转发到具有相应缓存内容的附近节点。为此，我们精心设计了一种使用计数布隆过滤器进行CS信息共享的高效方法。我们实现了所提出的方案，并与物联网中最先进的ICN转发方案进行了比较。实验结果表明，所提出的转发方案在缓存命中率、能源效率、内容检索延迟和响应率方面取得了显著改进。
