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christian louboutin: China Electronics Technology Group Corporation, the seventh, a professor level senior engineer Li Jinliang ->
Reuters 【communications industry (Author: China Electronics Technology Group Corporation, a professor level senior engineer Li Jinliang VII) in China since 2004, along the TD evolution of new routes opened up by the TD-LTE, TD congenital inherited a lot of good genes, acquired through the next-generation broadband mobile wireless network to four major projects, technology to keep pace with the international LTEFDD. Last May the Shanghai World Expo and Guangzhou Asian Games in November successfully demonstrated high-definition video, pass and shoot TD-LTE and other new business, access to the industry appreciated.  
This year, China Mobile will be launched in seven cities in organizations scale technology TD-LTE test. February Barcelona Conference, TD-LTE has become the brightest star. India, Japan and the United States have indicated that operators will use TD-LTE technology to build 4G networks. Houlin Zhao ITU Deputy Secretary-General also said there has been basically established 4G standard TD-LTE and WiMAX will be the two major technology generation, led by China TD-LTE technology,Christian Louboutin Rolando Pinch Toe Pump Black, most likely in the next generation mobile communication technology revolution to occupy opportunities. In this series, inspired by good news, we must not be triumphalist, that can immediately replace the TD-LTE commercial TD-SCDMA, 3G operators need to continue to build directly into 4G. We must keep a cool head TD-LTE three major difficulties facing today.  
First, technology and network

3G is CDMA-based technology, while 4G is OFDM, MIMO-based technology.  
CDMA technology from the late 80s transplanted to the 2G area, although theoretically superior to TDMA, but the initial rise to many problems, after ten years of research, especially South Korea's efforts to scale CDMA network reached 100 million users, and its superiority was recognized by the industry, market will gradually open up, just promoted to the mainstream of 3G technology. The first decade of the 21st century,Christian Louboutin Lady Glitter Slingback Gold, CDMA HSPA technology continues to develop in the direction until 2007 3G network to HSPA technology developed in the world.  
to OFDM, MIMO-based 4G technologies in mobile communications is also a lack of large-scale applications, should not be blindly optimistic that the difficulties and problems do not appear, therefore, today we should attach great importance to 7 cities network test, and constantly tests appear to solve the various technical and engineering issues to enable them to reach the commercial level.  
Second, chip and mobile phone

2000 the first building in Japan DoCoMo WCDMA network, until 2005, problems discovered in the commercial are: less style terminal, mobile phone prices much higher than 2G, the battery can not support more than one day, voice quality than 2G, easy to dropped calls, high speed data access capabilities are limited, and the quality of mobile video services is not satisfactory, 3G 3G terminal development is still the bottleneck.  
phone is based on the chip, the chip at this stage to follow Moore's Law, that is, the chip every 18 months, the calculation speed and the integrated double half the cost. 3G network construction in the early stage of chip technology is still in the 180-nm phase, the level of manufacturing of mobile phones as the issue appeared. After three or four mole cycle, improved to 90-65 nm chip technology stage, so after 2007 the production of mobile phones increased gradually improved to meet the needs of the 3G business use, then 3G networks, terminals and large-scale users only developed. Apple's first generation iPhone then there is no use 3G technology, or follow the 2G, EDGE. Apple only technology in the chip size and power consumption improved to an acceptable range, the user experience and battery life to meet the requirements, before considering the use of 3G technology. The success of Apple's practice of inspiration to us.  
and 4G data transfer rates 10-100 times higher than 3G, so the complexity of the circuit and the software must be increased correspondingly, the current level of 65-45 nm chip data card can only be made presentation for the Expo. To make the combination phone, you may have to wait for progress in 2013-2014 to 32 or 28 nm technology. To a large-scale application of the whole network, may be after 2015, higher integration out of the 22 nanometer technology. Chip-based development time about a year, generation of chips will soon have to do 1-2 years, two generations almost 4 years, this mature. Moore's Law is not violated.  
Third, business and market