Performance Analysis of an Energy-Efficient Clustering Algorithm for Coordination Networks
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Performance Analysis of an Energy-Efficient Clustering Algorithm for Coordination Networks Fei Ding1,2
· Yan Lu3 · Zhiwen Pan4 · Dengyin Zhang1,2 · Hongbo Zhu2
© Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract The mechanism of Coordinated Multi-Point (CoMP) can improve the spectral efficiency of the 4G and 5G cellular network, and also can reduce transmitting power of base stations (BSs). However, CoMP requires a large amount of energy due to extra signal processing and backhaul traffic. In this paper, an energy-efficient algorithm based on optimal dynamic clustering mechanism (ODCEM) for CoMP networks is proposed, which aims to minimize the overall network energy consumption. In the ODCEM, cells are pre-ordered in descending order according to their traffic load increments. The cell with lowest load increment is selected to switch off. Then, users in selected cell are handed over to other neighboring cells if quality of service (QoS) for users can be guaranteed. After that, the selected cell is switched off to conserve network energy. The remaining cells in each CoMP cluster will be evaluated after the previous order is updated. The simulation results show that the energy efficiency of ODCEM schemes is significantly higher than that of fixed CoMP algorithm in terms of SINR and traffic loads. Furthermore, the ODCEM algorithm can achieve better energy efficiency with lower computational complexity according to the performance evaluation of user association and BS switching off. Keywords Coordinated multi-point · Cell switch off · Energy efficiency
1 Introduction It is widely accepted that switching off the Evolved NodeB (eNB) which is not fully loaded is an effective way to improve system energy efficiency [1]. However, in current cell switch off schemes, neighboring cells are usually required to increase transmitting power to enlarge their coverage and handover the traffic of the switched off cells [2], and thus result in degradation of energy saving performance from the view of the whole network. 5G cellular network is an ultra dense network (UDN), in which a large number of high-density low-power transmission points (TPs) will be deployed, such as roadside station units (RSU) near the road to meet a large number of vehicle communications. UDN not only improves the system performance, but also introduces inter-cell interference (ICI). To eliminate ICI, coordinated multipoint (CoMP) will be widely used in UDN [3, 4].
Fei Ding
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Extended author information available on the last page of the article.
The CoMP mechanism has been adopted by 3GPP release 11 and beyond for its advantage in cell edge throughput and spectrum efficiency improving [5–10]. Naturally, the combination of CoMP and cell switch off in cellular network is a promising approach for energy saving [11] without increasing the transmitting power of the active cells. However, detailed power consumption models for eNB with CoMP transmission was missing until the contribution of [12] and [13]. Compared w
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