Energy Efficient Hybrid Edge Caching Scheme for Tactile Internet in 5G

Faster, wider bandwidth and better user experience, 5G is our vision for the future wireless communication. And the Tactile Internet, with ultra low latency, high availability, reliability, and security, is going to bring us the unprecedented real-time interactions just like the human sensing. In this paper, we focus on the solving problem of energy efficiency improvement in proactive in-network caching. We design a hybrid edge caching scheme based on four existing methods taking effect in different parts of the network. We also put forward a cache replacement policy to match the hybrid caching scheme considering the popularity of cached files which obeys Zipf distribution. The simulation results show that our proposed methods can reduce latency and achieve better performance in overall energy efficiency than existing ones