Latency Driven Fronthaul Bandwidth Allocation and Cooperative Beamforming for Cache-enabled Cloud-based 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This paper considers content delivery of the cache-enabled small cell networks (C-SCNs), where users with the same request form a multicast group and are served by a cluster of small-cell base stations (SBSs) under the coordination of the central processor. The performance of such a coordination is severely limited by the fronthaul link, which may be saturated and degrade quality of service (QoS). To improve user QoS, we propose a latency driven scheme by jointly optimizing fronthaul bandwidth allocation, multicast beamforming, and BS clustering. Accordingly, with min-max fairness among multicast groups, a latency minimization problem is formulated under the constraints of fronthaul bandwidth and transmission power. The resultant problem is a mixed-integer nonlinear program, which is NP-hard. To address such a complex problem, a quadratic penalty-based algorithm is proposed by using a reformulation of binary constraint. Meanwhile, we present the necessary condition for an optimal solution, which shows that fronthaul bandwidth allocation is inherently adaptive to cached contents and patterns of BS cooperation. Finally, simulation results demonstrate that the proposed scheme can effectively reduce latency under different caching strategies.
出版社接受日期29.01.2019
著者Xiongwei WU, Xinhua LI, Qiang LI, Victor C.M. LEUNG, P.C. CHING
會議名稱44th IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)
會議開始日12.05.2019
會議完結日17.05.2019
會議地點Brighton
會議國家/地區英國
會議論文集題名Proceedings ICASSP 2019
出版年份2019
月份5
日期12
出版社IEEE
出版地USA
頁次4594 - 4598
國際標準書號978-1-4799-8131-1
國際標準期刊號1520-6149
語言英式英語
關鍵詞Fronthaul Bandwidth Allocation, Multicast Beamforming, BS Clustering, C-SCN

上次更新時間 2020-10-10 於 01:42