NDLI: Joint beamforming and admission control for cache-enabled Cloud-RAN with limited fronthaul capacity

Content Provider	IET Digital Library
Author	Bsebsu, Ashraf Zheng, Gan Lambotharan, Sangarapillai Cumanan, Kanapathippillai Sadhan, Basil As
Abstract	Caching is a promising solution for the cloud radio access network (Cloud-RAN) to mitigate the traffic load problem in the fronthaul links. Multiuser downlink beamforming plays an important role in efficient utilisation of spectrum and transmission power while satisfying the user's quality of service requirements. When the number of users exceeds the serving capacity of the network, certain users will have to be dropped or rescheduled. This is normally achieved by appropriate admission control mechanisms. Introducing local storage or cache at the remote radio heads where some popular contents are cached, the authors propose beamforming and admission control techniques for cache-enabled Cloud-RAN in the downlink. This minimises the total network cost including power and fronthaul cost while admitting as many users as possible. They formulate this multi-objective optimisation problem as a single objective optimisation problem. The original problem, which is a mixed-integer non-linear programme, is first converted to the mixed-integer second-order cone programming form. The branch and bound algorithm is then used to determine the optimal and suboptimal solutions. A simulation study has been conducted to assess the performance of both methods.
Starting Page	278
Ending Page	287
Page Count	10
ISSN	17519675
Volume Number	14
e-ISSN	17519683
Issue Number	Issue 5, Jul (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-spr/14/5
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-spr.2019.0247
Journal	IET Signal Processing
Publisher Date	2020-03-03
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Admission Control Mechanisms Array Signal Processing Cache-enabled Cloud-RAN Cellular Radio Cloud Computing Cloud Radio Access Network Control Application in Radio And Radar Cooperative Communication Digital Signal Processing Fronthaul Capacity Fronthaul Link Internet Software Minimisation Mixed-integer Nonlinear Program Mobile Radio System Multiobjective Optimisation Problem Multiuser Downlink Beamforming Optimisation Technique Quality of Service Radio Access Network Radio Access System Signal Processing And Detection Single Objective Optimisation Problem Telecommunication Congestion Control Traffic Load Problem
Content Type	Text
Resource Type	Article
Subject	Signal Processing Electrical and Electronic Engineering

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