TD-SCDMA point of view to rub out the Sparks

Recently, many people in the industry around the TD-SCDMA's right and wrong to express their views. Although there is no lack of objective and rational analysis, their attractiveness is far less attractive than those of those who blame each other. In the discussion around TD, to Xiang, Lin and Yang Yi as the representative of the TD and to Shankai, Fu Haiyang as the representative of the batch of TD sent after several times, the attraction of a large number of unknown truth on the crowd. Because many of their views and objective facts do not match, may wish to take out the point of view to analyze, fair and comfortable hearts.

Xiang: "As 3G to 4G can be upgraded smoothly, in the Chinese enterprises with TD-SCDMA accumulation of td-scdma90%,wcdma55%,cdma2000 65% of the market share after the 4G era of Chinese enterprises can still dominate." ”

After the release of TD-type innovation, Mr. Xiang, as a long-time media person who has been reporting on the communications industry, has published several articles criticizing the author of this article and even publishing the media. With Huawei-led Chinese companies already surpassing Ericsson as the world's number one telecoms equipment maker, Mr Xiang even suggested that "Huawei's ZTE success is the credit of TD-SCDMA." ”

According to the public information on the network, telecom CDMA2000 network equipment is provided by Huawei, ZTE and Shanghai Bell three companies respectively. And Shanghai Bell as the SASAC directly under the central enterprises, is by the state-owned and foreign capital joint holding. With this in mind, China's 3G market share has changed, CDMA2000 Base station equipment 100% by Chinese companies, and WCDMA Chinese companies have a market share of more than 60%.

In addition to the above mistakes, Huawei and ZTE's rapid development and TD-SCDMA are not necessarily linked. On the one hand, because the world does not have any country and region to use TD-SCDMA, relying on overseas market development and growth of ZTE Huawei must rely on GSM, WCDMA, such as the international mainstream format. On the other hand, since China did not issue TD-SCDMA licences until 2009, the belated TD-SCDMA has not been much help for ZTE Huawei, which has become a world-class enterprise in the 2008. According to the author's years of interviews, both Huawei and ZTE's communications engineers are generally skeptical of TD-SCDMA. Huawei has been involved in TD-SCDMA development only through a joint venture with Siemens, whose parent company has not devoted much effort to TD-SCDMA.

Fu Haiyang: TD-SCDMA Smart Antenna has a problem!

The first person to question the TD-SCDMA technology is a doctoral tutor Fu Haiyang of Nanjing University of Posts and telecommunications. As early as 2005, Fu Haiyang has questioned TD-SCDMA's core technology smart antenna, thinking that the technology may be suspected of forgery. Due to the lack of results, Professor Fu Haiyang on Sina's blog published a number of questions about the TD-SCDMA Smart antenna fraud paper, caused a lot of media attention. For a time, the network set off a TD-SCDMA is another academic fraud "Han-core" big discussion.

From the 2000 TD-SCDMA Standard proposed to 2008 Professor Fu Haiyang Sina Blog on the public query, the entire TD-SCDMA technology development has been over 9 years. If the smart antenna exists technology fraud, manufacturers to avoid this without mentioning clearly unreasonable. Since TD-SCDMA has a large number of enterprises to join, to prove that TD-SCDMA smart antenna is not a problem, the urgent task is to take out qualified products. Facts speak louder than words, with qualified products, whether the fraud also has the answer.

However, the situation is not as optimistic as expected, from the beginning of the 3G licensing, China Mobile TD-SCDMA network construction has encountered a lot of problems. As a core advantage of TD-SCDMA Smart antenna technology due to large volume (equivalent to Two-thirds of a door), in the construction process by the surrounding residents of a large number of resistance. Not only that, because the smart antenna technology is not mature, relying on the smart antenna TD-SCDMA in the signal coverage of the serious problems. Today, a large number of mobile phone users still stay on the 2G and 4G networks, 3G Network utilization is only the official claim of 30%. In order to solve the problem of poor coverage of TD-SCDMA network, China Mobile has to use a large number of WiFi hotspots to divert data services, and the 3G signal has become the heart of China Mobile forever pain.

Lin: TDD format will become the international mainstream!

Mr. Lin, one of the "TD's eight old", has been a hard-line supporter of TD. In many of Professor Lin's articles, the advantage of TDD duplex is repeatedly mentioned as not requiring a pair of spectrum. Because of the rarity of spectrum, TDD will be increasingly favored by the global information and communication industry.

The impression that, as early as a few years ago, Professor Lin repeatedly emphasized the superiority of TDD technology in several articles supporting TD-SCDMA. However, after all these years, TD-SCDMA has the advantage of TDD to save spectrum resources, but it still can't go abroad. Although with the popularization of 3G and the promotion of mobile Internet, the spectrum resources of 3G network are becoming more and more tense. But the vast majority of the world's operators would rather have the TDD spectrum on the air and not deploy TD-SCDMA on that band. This is because they found a better solution, that is, 4G. Because of the use of OFDM, MIMO and other advanced technology, 4G spectrum utilization than 3G higher, the cost is cheaper. Such a cheap solution naturally gets the majority of the world's most operators of the favor, TD-SCDMA can only lament their untimely. Even in the 4G era, Fdd-lte as WCDMA and CDMA2000 natural evolution, still by the majority of the global operator's pro-Lai. Although there is the advantage of using discrete spectrum, but as the fdd-lte spectrum utilization, LTE is still used as an effective complement of fdd-lte, and not many operators actively choose to use only LTE.

Shankai: LTE is not independent intellectual property rights!

As a professor at Beijing University of Posts and telecommunications, Mr. Shankai has always had the title of "Kanbao Cannon". The reason why this title is because Shankai dare to express their views, and often language is amazing. Long before the 3G licence was issued, Professor Shankai that unimpressed was a dragon Slayer, eventually causing the operators to lose their shirts. In the 4G era, Professor Shankai that the reason why China only on the LTE is only the result of kidnapping by interest groups, LTE and independent intellectual property rights are not much relationship.

In many of the articles criticizing Professor Shankai, the focus has been on the idea of "unimpressed is a dragon Slayer" and there is little positive response to Professor Shankai's 4G view. Before the iphone was released, the world's leading 3G operators were experiencing bottlenecks, and traditional 3G handsets did not meet the growing needs of people. In the global 3G operator development encountered bottlenecks in the stage of "unimpressed is the dragon slaughter" such a view, in fact, there is no big problem. After the iphone release and the popularity of Android smartphones, the demand for 3G networks has reached an unprecedented level, and "unimpressed" is naturally no longer tenable. No one can predict that the popularity of smartphones is a huge boost to the 3G network, accusing Professor Shankai of unreasonable views at the time.

In the long interview process, the author consulted a number of ZTE Huawei's core technical staff, they have no exception to tell the author, LTE and Fdd-lte Essence are LTE technology, belong to the same standard. The same format of different duplex mode, the similarity is naturally up to 90% or more, which is recognized in the industry. In the increasingly close global cooperation today, any one of the communication standards can not be a business or even a country could be independently developed. Either 3G or 4G, or the future 5G, are implemented in the framework of the Standardization organization 3GPP, 3GPP2. A large number of enterprises through the way of communication and negotiation, after a long accumulation can finally determine the corresponding standards. So the so-called LTE is "independent intellectual property Rights", Fdd-lte is the Western standard, itself is not rigorous.

Summary：

The so-called public said that the public is reasonable, the face of TD-SCDMA standards, we should neither too much myth, nor should be too critical. Practice is the only criterion for testing truth, let the facts tell us who is right and who is wrong.