April 15, the world's first TD-LTE demonstration network constructed by China Mobile opened in Shanghai. According to the plan, before the end of this year, China will select three pilot cities for TD-LTE, now tentatively scheduled for Qingdao, Xiamen and Zhuhai. In China, 3G just entered the popularity of, 4G's drums had sounded.
Should be noted that wireless technology is moving from 3G to 4G, from a single wireless environment to the general development of the wireless environment. Despite the magnitude of 3G to provide megabit (Mbit / s) transfer rate, but compared with the demand for broadband services is also very different; so people to have to focus on the higher rate, spectrum efficiency, low transmit power, and flexible business supporting capacity of 4G body, it can be wireless communications transmission capacity and the rate increased ten-fold or even hundreds of times.
However, countries have a larger vision for the 4G difference. Europe, Japan and the United States have their own views and 4G standards have been derived from three embryonic form.
European industry in general that, 4G is an effective use of available spectrum of new technologies, will adopt IPv6-based, will integrate the existing networks such as 4G network integrated satellite, stratospheric communication systems, digital broadcast television system, a variety of cellular and quasi-cellular systems, wireless local loop and the WLAN, but can also with 2G, 3G compatible.
Japan is even more keen to establish a single global standard for 4G. According to Nippon Telegraph and Telephone Company to disclose information display, in October 2002 the company had developed a unique 4G air interface, its most important feature is that it can change according to the specific communication service time and frequency of proliferation rate, in hot spots by reducing the proliferation rate of the priority increase the transmission rate, more environment, the user can also be increased by increasing the diffusion rate of the system capacity.
Meanwhile, Japan also cooperate with the European Union to develop 4G mobile phone business, the two sides will strengthen cooperation in the field of development and standardization of 4G development. The Japanese Government hopes to unify 4G standards, also called for national operators and handset manufacturers to participate in the development plan.
While the United States want to extend WLAN technology, which evolved into the basis for 4G.
Obviously, 4G standards war is over market interests. As the world's mobile phone power, China is also closely watching the latest 4G communications technology, and actively participate in R & D and standard-setting, hoping to win a medal in the 4G opportunities.
This behavior is undoubtedly wise, one of the benefits is the ability to effectively avoid paying high royalties. Data show that, in the 1G/2G stage, the external Chinese telecom companies to pay royalties to 250 billion to 5000 billion yuan. Therefore, 4G standards, China is a clear need to have their own independent standards.
Fortunately, the current research in 4G communications standards has become China's "863" high-tech part of the plan. 4G standards in research, China is making every effort to promote its core technology to become mainstream technology in the world. In fact, some countries into the 4G market, already takes into account the world's largest telecommunications market, China's initiatives in this regard. In this regard, China's telecom-related departments and enterprises must seize this scale advantages, and actively promoting international cooperation, gain the initiative in the evolution of 4G standards.
Although the communication in the world history, Europe accounted for in the 2G era was leading, Japan and South Korea is a leader in 3G era; But today, China to the World Expo as an opportunity to fully realize leap forward, we have reason to believe that China in the near future will become the world leader in the development of 4G.
