A Review on Green Caching Strategies for Next Generation Communication Networks

Abstract

In recent years, the ever-increasing demand for networking resources and energy, fueled by the unprecedented upsurge in Internet traffic, has been a cause for concern for many service providers. Content caching, which serves user requests locally, is deemed to be an enabling technology in addressing the challenges offered by the phenomenal growth in Internet traffic. Conventionally, content caching is considered as a viable solution to alleviate the backhaul pressure. However, recently, many studies have reported energy cost reductions contributed by content caching in cache-equipped networks. The hypothesis is that caching shortens content delivery distance and eventually achieves significant reduction in transmission energy consumption. This has motivated us to conduct this study and in this article, a comprehensive survey of the state-of-the-art green caching techniques is provided. This review paper extensively discusses contributions of the existing studies on green caching. In addition, the study explores different cache-equipped network types, solution methods, and application scenarios. We categorically present that the optimal selection of the caching nodes, smart resource management, popular content selection, and renewable energy integration can substantially improve energy efficiency of the cache-equipped systems. In addition, based on the comprehensive analysis, we also highlight some potential research ideas relevant to green content caching.

Cluster-Based Multi-User Multi-Server Caching Mechanism in Beyond 5G/6G MEC

“…The author of [ 26 ] discussed an open-source MEC architecture for 6G networks based on innovative decoupling and redesign techniques. A comprehensive survey [ 27 ] reviews the benefits and challenges of integrating network green communication strategies and MEC caching methods on public health and environmental stability. Ref.…”

Energy Resilience in Telecommunication Networks: A Comprehensive Review of Strategies and Challenges

“…The study covered diverse areas such as device-to-device communication, spectrum sharing, ultra-dense networks, massive MIMO, and the Internet of Things. Meanwhile, Zahed et al [12] scrutinized caching strategies for green networks. Conversely, a comprehensive exploration of green networks and the integration of renewable energy configurations and control with energy efficiency techniques, including sleeping modes, was presented by [13][14][15].…”

A Survey on Cache-Aided NOMA for 6G Networks

“…The authors present a comparative study of various methods (such as optimization techniques, analytical methods, game theory, matching theory, graph theory, and machine learning techniques) involved to address the problem of resource allocation, signaling, practical implementation, and security aspects of NOMA technologies in [34]. In [42], the authors studied recent development on the green content caching technique to explore various cacheequipped wireless networks, research-gap, solution methods, and application areas. In [41], Liying et al present a fundamental concept of caching techniques and their recent development in various types of cellular networks such as macro-cellular, heterogeneous, device-to-device, cloud-radio access, and fog-radio access networks.…”

“…The survey paper [45] focuses on caching techniques for vehicular communication. Although individual surveys on NOMA and caching do exist [24], [41], [42], explicit analysis of cacheaided NOMA systems and their applications have not been reported yet.…”

“…[31] 2020 [32], [33] 2021 [34] 2022 [35] Cache 2009 [36] • Contributions of existing caching [38], [39] 2018 [40], [41] 2020 [42] The existing studies on green caching 2020 [43] The edge caching in cellular network Cache-aided Design principles, challenges, key fea-NOMA This paper tures, and diverse practical applications of cache-aided NOMA systems.…”