Joint Long-Term Cache Allocation and Short-Term Content Delivery in Green Cloud Small Cell Networks
Refereed conference paper presented and published in conference proceedings

香港中文大學研究人員
替代計量分析
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其它資訊
摘要Recent years have witnessed an exponential growth of mobile data traffic, which may lead to a serious traffic burn on the wireless networks and considerable power consumption. Network densification and edge caching are effective approaches to addressing these challenges. In this study, we investigate joint long-term cache allocation and short-term content delivery in cloud small cell networks (C-SCNs), where multiple small-cell BSs (SBSs) are connected to the central processor via fronthaul and can store popular contents so as to reduce the duplicated transmissions in networks. Accordingly, a long-term power minimization problem is formulated by jointly optimizing multicast beamforming, BS clustering, and cache allocation under quality of service (QoS) and storage constraints. The resultant mixed timescale design problem is an anticausal problem because the optimal cache allocation depends on the future file requests. To handle it, a two-stage optimization scheme is proposed by utilizing historical knowledge of users’ requests and channel state information. Specifically, the online content delivery design is tackled with a penalty-based approach, and the periodic cache updating is optimized with a distributed alternating method. Simulation results indicate that the proposed scheme significantly outperforms conventional schemes and performs extremely close to a genie-aided lower bound in the low caching region.
出版社接受日期04.02.2019
著者Xiongwei WU, Qiang LI, Xinhua LI, Victor C.M. LEUNG, P.C. CHING
會議名稱2019 IEEE International Conference on Communications
會議開始日20.05.2019
會議完結日24.05.2019
會議地點Shanghai
會議國家/地區中國
會議論文集題名Proceedings IEEE ICC 2019
出版年份2019
月份5
日期20
出版社IEEE
出版地USA
國際標準書號978-1-5386-8088-9
國際標準期刊號1550-3607
語言美式英語
關鍵詞Cache Allocation, Content Delivery, Small Cell Networks, joint optimization, multicast beamforming

上次更新時間 2020-10-10 於 01:42