Two factors affecting the development of TD-LTE terminals
At this stage, the reasons for the slow development of terminal chips come from two aspects: first, uncertain factors, including uncertainty of commercial progress and uncertainty of spectrum division; secondly, people have high requirements for terminal chips.
From TD-SCDMA development to commercial use, terminals have always been regarded as a bottleneck for development. Therefore, at the beginning of the development of the TD industry, from the government authorities to operators, the terminal industry, including chips and operating systems, are highly valued and supported. . Thanks to the efforts of China Mobile in recent years, on the basis of the increasingly perfect industrial chain, TD terminals have promoted terminal sales through multiple channels, and most TD terminals have outperformed other standard products in terms of quality, price and launch time. The development of TD mobile phones has entered an outbreak period. As of May 4, 2012, TD effective network access terminals totaled 564. In response to the TD terminal's further solid foundation and evolution to the TD-LTE market, the reporter recently interviewed the Secretary-General of the TD Technology Forum.
The market scale can greatly stimulate the TD terminal industry chain
　 Reporter: What is the main reason for the rapid progress of TD-SCDMA terminals in recent years?
Time: The total number of mobile subscribers in China is close to 700 million. The potential market size of TD terminals is considerable. This is also an important reason why China Mobile can successfully promote the industrial chain and promote the rapid development of terminals.
After the commercialization of TD-SCDMA in 2009, under the strong promotion of China Mobile, through the joint efforts of all sectors of the industry chain, the construction and optimization of TD-SCDMA network is basically perfect, and the "terminal-chip" restricts the development of TD-SCDMA. The bottleneck problem has been solved fundamentally. At present, all chip manufacturers have chips and solutions from low-end functional machines to high-end smart phones. More and more domestic and foreign terminal manufacturers have entered the field of TD-SCDMA terminals, and many "excellent machines" have emerged. ". The maturity of both the network and the terminal has greatly improved the user experience. Therefore, TD-SCDMA has entered an explosive growth phase since the second half of last year.
At present, 15 domestic and foreign chips and terminal companies have joined the TD Technology Forum. They are already developing TD-SCDMA and TD-LTE chips and terminals, including several international chip terminal giants. Their participation will definitely Promote the industrial development process of TD terminals. At the same time, in the future market competition, this will also bring more pressure to domestic local enterprises.
Terminal chip development is slower due to two points
Reporter: The trial network of TD-LTE 20,000 base station scale has begun construction. The TD-LTE terminal is still the bottleneck. What do you think is the main reason?
Time: In the development of TD-SCDMA, the lag of terminal chips has seriously affected the development of the industry. With the development experience of TD-SCDMA, the Institute of Telecommunications of the Ministry of Industry and Information Technology and China Mobile have repeatedly emphasized the urgency of accelerating the development of terminal chips at the beginning of TD-LTE development. At this stage, the reasons for the slow development of terminal chips come from two aspects: first, uncertain factors, including uncertainty of commercial progress and uncertainty of spectrum division; secondly, people have high requirements for terminal chips.
In terms of uncertainties, frequency allocation will directly affect the design of the chip. Unlike system equipment changes, if the frequency is changed, the entire chip or even the terminal must be changed. Uncertainty in frequency makes the R&D investment and technical direction of the terminal chip uncertain. At present, chip manufacturers are very concerned about which frequency band TD-LTE will work in the future. From a technical point of view, there should be more suitable frequency assignments for mobile communication services to TD-LTE.
Another major challenge facing terminal chips is the ever-increasing demands of people. The future network is coexisting in a variety of formats. The chip will face various frequency bands from 800MHz to 2.6GHz, various formats from GSM to TD-LTE, and various data rate services from voice to video interaction. Compared with base station equipment that can continuously expand capacity, the terminal equipment such as mobile phones have limited capacity and power consumption, and are required to carry various communication technologies ranging from GSM to TD-SCDMA to TD-LTE, and even compatible with LTE-FDD. The 100-K voice communication service to the 100-megabit data service must greatly improve the function of the chip under the same size, and at the same time consume less power. In the case of increased complexity, people are required to use lower power consumption and higher integration of the terminal chip, while at the same time requiring lower prices, the price of the smart terminal is below 1,000 yuan. In general, the task is low price, which is a big challenge for the terminal chip.
Let manufacturers see the most important rewards
Reporter: How to promote the development of TD-LTE chips?
Time: Although the development of TD-LTE terminal chips faces many challenges, it has made considerable progress compared to TD-SCDMA. In the first phase of the TD-LTE scale experiment, 11 chip manufacturers and a number of terminal manufacturers have participated. For the development of TD-LTE terminal chips, it may be most important for manufacturers to see the return. TD-LTE can be used first in local areas and hotspots where high-speed data needs are relatively strong, both in terms of technical conditions and industrial conditions. This way manufacturers will not only invest but also see returns, which will drive the development of terminal chips.
TD-LTE is a technology with independent intellectual property rights in China, so TD-LTE has unique advantages in many fields in China. For example, in areas such as security, video surveillance, urban emergency warning, public security, etc., which are related to national and social security, TD-LTE is naturally considered to be the first choice. The Secretary-General of the TD Technology Forum said that industry applications are also a good development opportunity for TD-LTE. Compared with public mobile communication, industry applications have several characteristics: first, the application scenario is simple and the user needs are clear, which brings great convenience to the networking; second, most of the industry applications are data services, data services. The profit is relatively rich; third, the requirements for industry application in the cost of network construction are not so high, and the price pressure faced by operators and equipment vendors is relatively small. Therefore, from the perspective of economic efficiency, industry applications are very beneficial to the development of TD-LTE.
There is still a long way to go before TD-LTE commercials
Reporter: How far do you think TD-LTE is from commercial use?
Time: At present, China's TD-LTE has made gratifying progress, but there is still a certain distance from commercial use. In general, the development of TD-LTE is healthy, and the development speed is normal, in line with the law of industrial development. However, it can also be seen that compared with the commercial use of FDD, China's TD-LTE is still in the stage of scale trial, and there is still a long way to go from commercial use. How fast we can go.
In general, a network needs to undergo large-scale networking experiments and a large number of users before commercial use. At present, China's TD-LTE has not yet experienced such a test.
Before TD-LTE is commercialized, it needs to break through in several aspects. First, in terms of terminal chips, it is necessary to develop smart terminal chips that support multi-mode, multi-service, multi-band, and at the same time cheap and low power consumption. Second, in terms of testing, the current solutions for business simulation test systems are still lacking. There are not many manufacturers that can develop mature and reliable high-speed data service simulation test systems at home and abroad. The TD-LTE service type and application scenario are very complex, and the requirements for the service simulation test system are very urgent. Third, in terms of large-scale networking, China Mobile has proposed a “four-network collaboration†strategy, which poses new challenges in hybrid networking. At the same time, the gap between the scale network test and the real large-scale commercial network is relatively large. It seems that the mature system equipment still needs to be improved and adjusted in the face of commercial use. Fourth, the resource issue is the frequency issue. Although the radio management department has made great efforts, the frequency bands currently assigned to the TD-LTE service are still not ideal. For mobile communications, the frequency is the outline and the outline of the project. The entire industry chain is expecting that the frequency bands more suitable for the characteristics of mobile communication services can be assigned to TD-LTE.
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