Abstract
With the continuous increase of user requirement, the Information and Communication Technology (ICT) has developed rapidly. As a result, both capacity and coverage performances have been improved, and at the same time, the communication networks have been more energy-intensive. In order to improve the energy efficiency of cellular networks, the green communication must be realized in the future networks. In this article, we present a short survey on energy-efficient technology of cellular networks. Moreover, we classify them into three categories based on theirapplication scenarios: energy-efficient architectures, energy-efficient resource management and energy-efficient radio technologies. For the first scenario, the applications of relay, Coordinated Multiple Points (CoMP) and heterogeneous network are discussed in detail. For the second scenario, the switching off scheme will be introduced as an emphasis of this part. And for the third scenario, the Multiple-Input Multiple-Output (MIMO) and Orthogonal Frequency Division Multiplexing (OFDM) will be introduced as the representatives of the Energy-Efficient Radio Technologies. Finally, based on the technologies introduced above, a prospect forecast of the energy-efficient wireless cellular network is presented.
Highlights
In the last several decades, due to the continuous increase of communication requirement, the Information and Communication Technology (ICT) developed rapidly focused on the higher capacity and larger coverage [1]
The energy consumption is growing at an amazing speed: the ICT is responsible for about 3% of energy consumption and 2% - 4% of CO2 emission all over the world [2,3], and the energy consumption will increase at a rate of 15% - 20% per year and will double after 5 years [4]
The result within this paper shows that the energy minimization will not decrease the Signal to Interference Noise Ratio (SINR) of cellular relay network
Summary
In the last several decades, due to the continuous increase of communication requirement, the Information and Communication Technology (ICT) developed rapidly focused on the higher capacity and larger coverage [1]. Within the wireless cellular networks, the Base Station (BS) occupies a significant portion of energy about 60% - 80%, which means a breakthrough point to decrease the energy consumption [5]. In order to reduce the energy consumption, several organizations or projects, such as the Energy Aware Radio and Network Technologies (EARTH), have been founded, and many workshops have been organized at international conference [6,7]. We present a survey on energy-efficient technology within the cellular network. For each aspect, the representative technologies are introduced and discussed further. A prospect forecast of the energy-efficient wireless cellular network is presented.
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