In response to the challenges of wireless broadband access technology and meetting the future demand for broadband services, the mainstream wireless communication systems are seek solutions to the evolution of next generation mobile communication systems. The basic objective of evolution is to achieve higher data rates, shorter delays and lower costs, higher system capacity and
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Wireless sensor networks(WSNs) are widely applied in environmental perception applications because of their advantages such as expansibility, real time property, various information acquisition, etc. While, limited resources of WSNs(e.g. energy) make the significance of saving energy self-evident. How to reduce power consumption has become a significant research area, which should be implemented throughout each part
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The shortage of electric energy is now increasing greatly, so energy saving and consumption reducing have become the hot issue of general concern of the public. To China Mobile, for example, communications room energy consumption accounted for 70% of energy consumption across the enterprise. Room air conditioning energy consumption accounted for 30% to 50%, and
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Currently, mobile devices are already became more and more important to people. And they have already been shipped with faster processors, more memory, multiple radio interfaces, and powerful operating systems (OS), and, consequently, heavier applications. Moreover, specialized operating systems have been developed for handheld devices. Microsoft’s Windows Mobile, and Google’s Android are example operating systems
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Now projector is widely applied to people’s daily work, study, life, along with growth of multimedia teaching, business, entertainment demand, at present the projector market is fast growing by 30% every year. In 2010 output value of projector is up to 26 billion RMB, annual output of 7.1 million units, more than 70% for export,
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Today, Frequent,multiple, re-issued natural disasters in the world, the green, low-carbon life has become a topic of concern in today’s society, calls for green is very important. Although the relay has been a century of history of application, but it has revealed many problems in practice. frequent failures of relay control system caused because poor
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Next generation mobile communication has the requirement of high transmission rate and high frequency efficiency. Recently, cooperative communication is considered as one of the key characteristics of future mobile communication system. It offers user diversity and spatial diversity gains, increases the transmission rate as well as extends the coverage of the system. Besides, cooperation technique
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Next generation mobile communication has the requirement of high transmission rate and high frequency efficiency. Recently, cooperative communication is considered as one of the key characteristics of future mobile communication system. It offers user diversity and spatial diversity gains, increases the transmission rate as well as extends the coverage of the system. Besides, cooperation technique
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Recently, demand of large-scale computing is growing day by day, so as a better solution, cloud computing is becoming a well-known mode of calculation. Through aggregating and dynamic reusing resources, cloud computing achieves to optimize the service process and to improve the utilization of energy. With the booming developing of cloud computing, lots of research
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Nowadays, the global warming problem resulting from a large amount emission of greenhouse gases has become more and more serious, which leads to that energy saving and emission reduction becomes the issue humankind is faced with. Long term evolution(LTE), on behalf of next generation communication technologies, not only has to improve in the respects of
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