Robust Optimization For Energy Efficiency In Multicast Downlink C-Ran
2017 IEEE WIRELESS COMMUNICATIONS AND NETWORKING CONFERENCE (WCNC)(2017)
摘要
In this paper, we investigate robust energy efficiency design for multicast downlink cloud radio access network (C-RAN) for both data-sharing and compression strategies. The two strategies mainly differ in whether the baseband units pool compresses the user messages before transmitting them to remote radio heads (RRH). The performance of worst-case energy efficiency for both strategies is compared by formulating the robust energy efficiency maximization problem subjected to finite RRH power budgets, limited fronthaul link capacity, and minimum quality-of-service constraints when only imperfect channel state information (CSI) is available at the transmitter. To solve these problems, we cast them into semidefinite program problems and solve them iteratively. Simulation results demonstrate effectiveness of our proposed algorithms and two strategies are compared under imperfect CSI.
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关键词
energy efficiency robust optimization,multicast downlink cloud radio access network,multicast downlink C-RAN,data sharing strategies,data compression strategies,remote radio heads,finite RRH power budgets,energy efficiency maximization problem,fronthaul link capacity,quality of service,channel state information,CSI,semidefinite program
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