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Research on simultaneous localization and mapping for AUV by an improved method: Variance reduction FastSLAM with simulated annealing Defence Technology 16, 651 (2020); Gait planning and control method for humanoid robot using improved target positioning SCIENCE CHINA Information Sciences Improved ENSO simulation in regional coupled GCM using regressive correction method Science in China Series DEarth Sciences 50, 1258 (2007); Mapping coalmine goaf using transient electromagnetic method and high density resistivity method in Ordos City, China Geodesy and Geodynamics 7, 340 (2016);. BRIEF REPORT. SCIENCE CHINA Information Sciences

CCN (Content-centric network) has emerged as a promising architecture for future 5G network due to its in-network caching capability and receiver-driven content retrieval paradigm. Recently, the explosive increase in energy consumption driven by the rapid growth of network traffic has become a fundamental issue in CCN and caused widespread academic concern. In this paper, we proposed an energyefficient scheme for the future 5G network. The aim of our scheme is to minimize the energy consumption by considering some important constraints, including limited storage, content popularity, placement and access to contents. Our proposed scheme provides efficient utilization of hotspot cache, minimizing transportation cost by using Zipf and knapsack which ensure local availability of cache contents and minimizing energy consumption. Finally, simulation results reveal that our proposed scheme outperform in term of saving energy, the impact of content popularity, cache size, placement, and device-to-device communication. INDEX TERMS Caching probability, energy efficiency, content-centric networking, popularity of contents, cache resource allocation.