Abstract
In recent years, investigations on various forms of solution for Internet of Things (IoT) paradigm opens the new era of smart devices. The Information-Centric Internet of Things (IC-IoT) can apply the characteristics of content caching which is a typical feature of Information-Centric Networking. Therefore, designing an efficient caching strategy for IC-IoT is able to improve the efficiency of smart devices. In this paper, we propose a Pre-Caching Strategy based on the Relevance of smart device request Content, namely PCSRC. After the first request of content chunk at a smart device side, PCSRC pre-caches the rest of the content chunks. There are two types of cached content chunks, that is, actual requested content chunks and pre-caching content chunks. Actual requested content chunks are pushed forward hop-by-hop according to the trend of the local activity. The popular content will be gradually pushed to the edge of IC-IoT. Furthermore, a sojourn time of a cached content chunk is employed to save storage space. The simulation results show PCSRC can reach 42.7% on the cache hit ratio with the different storage sizes. For the average hop count, PCSRC can increase about 42.2% than that of ProbCache. And PCSRC can improve about 47.9% than that of CEE for the average hop count.
Highlights
With the rapid development of the Internet of Things (IoT), this paradigm opens a new era of smart devices and has become a comprehensive application of a new generation for information technology [1], [2]
Considering that a user may send a request for different content chunks of the same content within a short time, we propose a pre-caching strategy for content chunks to reduce the delay of requesting subsequent content chunks
As an important feature of Information-Centric Internet of Things (IC-IoT), cache is an important means to improve the performance of smart devices in the network
Summary
With the rapid development of the Internet of Things (IoT), this paradigm opens a new era of smart devices and has become a comprehensive application of a new generation for information technology [1], [2]. Information-Centric Internet of Things (IC-IoT) can apply the ICN’s the characteristics of content caching to the IoT, which can reduce the energy loss and improve the performance of the network. M. Zhang et al.: Pre-Caching Strategy Based on the Content Relevance of Smart Device’s Request. The above work has verified that introducing the relevance of the requested content into the caching system will greatly help improve the performance of the network. In IC-IoT, it is important to study a pre-caching strategy based on the content relevance of smart device requests to improve the performance of the network. The main contributions in this paper are as follows: (1) We introduce a pre-caching strategy which can precache the subsequent content chunks of a requested content.
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