Energy Saving Solutions and Practices of China Mobile (2012)

Devices and Systems from CMCC . . . . . . . . . . . . . . . . . . . . . . 53 3.2 Energy Saving Solutions for Wireless Networks . . . . . . . . . . . . . . . . . 533.2.1 The High-Energy-Eﬃcient Hardware Platform . . . . . . . . . 54 3.2.1.1 RRUs in Distributed Base Stations . . . . . . . . . . 55 3.2.1.2 Distributed RRU Networking . . . . . . . . . . . . . . . . 55 3.2.1.3 Multi-Carrier Distributed Base Station . . . . . . 57 3.2.1.4 Energy Saving Advantages . . . . . . . . . . . . . . . . . . . 593.2.2 Software Power-Saving Features . . . . . . . . . . . . . . . . . . . . . . . . . 60 3.2.2.1 Intelligent Power-Saving Technology . . . . . . . . . 603.2.3 GSM Intelligent Power-Saving System Based on Base Station Sector Switching . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62 3.2.3.1 System Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62 3.2.3.2 Typical Power-Saving Proposals . . . . . . . . . . . . . 643.2.4 Highly Energy-Eﬃcient RAN Network Architecture . . . . 65 3.3 Energy Saving Proposals for Core Networks and Data Centers . 663.3.1 Energy Saving of Data Center Facilities . . . . . . . . . . . . . . . . 66 3.3.1.1 Data Center Energy Eﬃciency Assessmentand Optimization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66 3.3.1.2 The Analysis of the Main Factors AﬀectingEnergy Eﬃciency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67Fundamentals,3.3.1.3 Technologies and Measures for Optimizing Energy Eﬃciency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 693.3.1.4 The Construction of the New Generation of Green Data Center . . . . . . . . . . . . . . . . . . . . . . . . . . . 693.3.2 Energy Saving of IT Equipment . . . . . . . . . . . . . . . . . . . . . . . . . 72 3.3.2.1 Improve Equipment Eﬃciency Requirements 72 3.3.2.2 Applications of Server Virtualization . . . . . . . . 73 3.3.2.3 Power Management for Cloud Computing . . . 743.4 Energy-Saving Solutions for Accessory Equipments . . . . . . . . . . . . . 75 3.4.1 Energy-Saving Solutions for the Refrigeration System . . 753.4.1.1 Smart Ventilation System . . . . . . . . . . . . . . . . . . . . 75 3.4.1.2 Heat-Pipe Heat-Exchanger Unit . . . . . . . . . . . . . 753.4.2 The Energy Saving Solutions for Backup Power Systems 76 3.4.2.1 Lithium Iron-Phosphate Battery . . . . . . . . . . . . . 76 3.4.2.2 The Thermostat for Rechargeable Battery . . 773.4.3 Energy Saving Solutions Using Renewable Energy . . . . . 78 3.4.3.1 Solar Energy Utilization for Base Stations . . . 78 3.4.3.2 Base Stations Powered by Wind EnergyTechnologies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78 Bibliography . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79 Author Contact Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81China has treated energy conservation and environmental protection as a national strategic policy. Energy conservation is not only an indispensable part of business activities in China Mobile Communications Corporation (CMCC), but also one of the main corporate social responsibilities. CMCC focuses on six green aspects, including the conservation of energy, materials, lands, and costs, as well as waste recycling and society informationization. CMCC has established a green-dedicated unit, “Green action plan working group”, to promote energy conservation. Compared with the energy consumption per unit volume of business in 2005, in 2010, CMCC has realized the challenge goal of 40% reduction, and in the same time, signed a voluntary energy-saving and emission reduction agreement with the China National Ministry of Industry and Information Technology, which has stated that “Compared with in 2008, in the end of December 2012, the energy consumption per unit of volume consumption per year will be decreased by 20% , achieving the electricity saving of 11.8 billion degrees”. Energy-saving and emission reduction may enable the business to enhance the soft-power, save operating expenditure, realize low-Mobilecost, and highly-eﬃcient operations, improve the eﬃciency and value of the enterprise to obtain the rapid, healthy and sustainable development.