Visible to the public HybridCache: AI-Assisted Cloud-RAN Caching with Reduced In-Network Content Redundancy

TitleHybridCache: AI-Assisted Cloud-RAN Caching with Reduced In-Network Content Redundancy
Publication TypeConference Paper
Year of Publication2020
AuthorsTirupathi, Chittibabu, Hamdaoui, Bechir, Rayes, Ammar
Conference NameGLOBECOM 2020 - 2020 IEEE Global Communications Conference
KeywordsC-RAN, caching, cloud computing, clustering, Computer architecture, coupled congestion control, delays, LSTM, prediction, pubcrawl, Redundancy, Resiliency, Scalability, Servers, Urban areas, Wireless communication
AbstractThe ever-increasing growth of urban populations coupled with recent mobile data usage trends has led to an unprecedented increase in wireless devices, services and applications, with varying quality of service needs in terms of latency, data rate, and connectivity. To cope with these rising demands and challenges, next-generation wireless networks have resorted to cloud radio access network (Cloud-RAN) technology as a way of reducing latency and network traffic. A concrete example of this is New York City's LinkNYC network infrastructure, which replaces the city's payphones with kiosk-like structures, called Links, to provide fast and free public Wi-Fi access to city users. When enabled with data storage capability, these Links can, for example, play the role of edge cloud devices to allow in-network content caching so that access latency and network traffic are reduced. In this paper, we propose HybridCache, a hybrid proactive and reactive in-network caching scheme that reduces content access latency and network traffic congestion substantially. It does so by first grouping edge cloud devices in clusters to minimize intra-cluster content access latency and then enabling cooperative-proactively and reactively-caching using LSTM-based prediction to minimize in-network content redundancy. Using the LinkNYC network as the backbone infrastructure for evaluation, we show that HybridCache reduces the number of hops that content needs to traverse and increases cache hit rates, thereby reducing both network traffic and content access latency.
Citation Keytirupathi_hybridcache_2020