Performance Comparison of Cache Based Routing in Information Centric IoT Networks

In-network caching within the distributed computing is one of the most promising aspects of Information-Centric Networking (ICN) in comparison with traditional centralized server based data retrieval. With ICN, it can ensure that required data is readily available within the intermediate IoT routers, even when the original producer is not reachable. However, in Internet of Things (IoT), where the storage capacity is often severely limited, IoT nodes cannot simply cache any and all the content that will receive to the intermediate caching device(routers). Hence, it is very significant to know which content has to cache and how long the content has to be in the intermediate caching device. Moreover, cache-based routing plays a predominant role in reducing the end-to-end delay with enhanced network throughput by efficiently discovering the shortest-path from the intermediate caching devices in ICN-IoT networks. In this paper, comparison of different cache based routing protocols for ICN-IoT networks is discussed in terms of ICN caching and cache replacement strategies along with the performance metrics suitable for evaluating in an IoT context.