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Anonymous users2024-02-06Yes. TD-SCDMA is the abbreviation of English Time Division-Synchronous Code Division Multiple Access (Time Division Synchronous Code Division Multiple Access), the third-generation mobile communication standard (referred to as 3G) proposed by China, and one of the three 3G standards approved by the ITU. It is an important milestone in the history of China's telecommunications.
Compared with the other two main 3G standards, CDMA2000 and WCDMA, it started late and the technology is not mature enough. According to Nomura**, by the end of 2014, the cumulative investment in the construction of the TD-SCDMA network exceeded 188 billion yuan. Coupled with the terminal subsidies and marketing resources invested by China Mobile, it is conservatively estimated that the investment is far more than 200 billion yuan.
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Anonymous users2024-02-05Top down! It seems that in the future, mobile TD-SCDMA will not be cheaper than Unicom WCDMA, and may be even more expensive! Because we added a Datang, a company that I had never even heard of, to cheat us out of money, and then add the time, cost and so-called R&D money invested in this, and it was immature!
The fantasy of us ordinary people using 3G is still far away!
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Anonymous users2024-02-04TD-SCDMA, as the third-generation mobile communication standard (referred to as 3G) proposed by China, has gone through more than ten years since it was officially submitted to ITU (ITU) in 1998, and has completed a series of international standardization work such as the evaluation of the expert group of the standard, the recognition and release of the ITU, the integration with the 3GPP (third generation partnership project) system, and the introduction of new technical features, so that the TD SCDMA standard has become the first international standardization work proposed by China. An internationally accepted and recognized international standard for wireless communications. This is an important milestone in the history of China's telecommunications.
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Anonymous users2024-02-03TD-SCDMA is Time Division Synchronization Code Division Multiple Access.
Access to the communication technology source bend also belongs to a kind of wireless communication technology standard, it was first proposed by China and on the basis of this wireless transmission technology (RTT) hail and international cooperation, completed the TD SCDMA standard, became a member of the CDMA TDD standard.
This is a pioneering initiative in China's mobile communications industry and China's contribution to the development of the third generation of mobile communications. In the competition with the 3G standards proposed by Europe and the United States, the TD-SCDMA proposed by China has officially become one of the global 3G standards, which marks that China has entered the world's leading position in the field of mobile communications. The main technology of this scheme is concentrated in the hands of Datang Corporation, and its design refers to the time domain mode of TDD (Time Division Duplex) in unpaired frequency bands.
Disadvantages of TD-SCDMA:
1. The technology is immature, and the entire industrial chain is immature, resulting in quite a lot of problems from the computer room, the base station to the mid-end of the mobile phone.
2. The transmission speed is slow and unstable. The theoretical peak speed is 384k s. You must know that the current peak speed of Edge has reached 480K S.
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Anonymous users2024-02-021. WCDMA technology is relatively mature and is used in Europe, but the occupied bandwidth is relatively stable for ordinary users;
2. TD-SCDMA is a standard developed in China, which has low cost and narrow frequency band for operators;
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Anonymous users2024-02-01One is the world standard, which is currently the most used 3G network, and the other is the Chinese standard, similar to the Kuomintang period, the railway in Shanxi is not the same as the track width in other places.
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Anonymous users2024-01-31It can be said that because the TD-LTE solution was first proposed by China's Datang Mobile and other domestic manufacturers.
TD-LTE contains a large number of Chinese patents, is led by China, and has received extensive international support and has become an international standard.
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Anonymous users2024-01-30Selling dog meat on the head of a sheep, In addition to the time slot structure is similar to TDSCDMA, most of the core patents are foreign, and there are many patents of Huawei ZTE Datang, but many junk patents.
Don't be fooled by the Datang gang. The people of Datang and Wang Jianzhou like to say that TD LTE and TDSCDMA are in the same vein, and they are a fart.
Yes"China-led"That's right, because it is mainly promoted by China Mobile, the world's largest operator.
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Anonymous users2024-01-29You can understand it this way, China dominated this technology, and now only China uses this technology.
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