摘要

Cloud radio access networks (C-RANs) have been proposed to provide high energy-spectral efficiency and high data rate at low cost. In this correspondence paper, we introduce a novel C-RAN deployment scheme that is complementary to traditional cellular radio networks. The key idea is to install the remote radio heads (RRHs) of the C-RAN in a load-balanced way to lighten the transmission burden of the backhauls between the RRHs and the centralized baseband unit pool, and to activate the RRHs on demand so as to reduce system-wide energy consumption. Numerical results show that our proposed method performs well in practical scenarios. It provides QoS-guaranteed performance with relatively low capital expenditure and operating expenditure.