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The centralized Radio Access Networks (RAN) architecture is one of the promising approaches to reduce energy consumption of Base Stations (BSs), while BS sleeping technology can achieve further energy savings. In this paper, a power consumption model of the centralized RAN architecture is proposed, which has not been addressed before. Moreover, we analyze the existing BS sleeping schemes and compare...
Switching off some Base Stations (BSs) with low traffic is a promising approach to save energy in cellular networks. However, it should be noted that frequently switching BSs on/off will result in extra energy consumption, hardware booting delay, bad quality of services (QoS) and so on. Therefore, we propose a Centralized Sleeping Scheme (CSS) to consider the performance of BS state stability which...
Due to the cooperation diversity, Coordinated Multi-Point (CoMP) transmission may potentially improve energy efficiency of cellular networks. The main purpose of this paper is to analyze this potential. By employing CoMP, there are two schemes to improve energy efficiency; one is to decrease the transmission power of base stations (CDTP) without changing cells' size and re-deploying base stations...
The two-stage cooperative multicast transmission is a promising scheme to combat the channel fading of different users in a multicast group, where the users successfully receiving data at the 1st stage can serve as relays to forward the data to the rest of users at the 2nd stage. Both the system throughput and total energy consumption increase with the number of relays. To obtain a balance between...
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