What are the characteristics of 3G mobile phones?

In China, 3G has been mentioned for many years. Since 2005, the media has said every year that "3G licenses are expected to be issued this year", but it has been delayed until 2009. Why hasn't it been realized? This is inseparable from the shadow of Qualcomm, because 3G involves various patented technologies. Qualcomm is in an absolute dominant position in CDMA2000, with major basic patents, accounting for 29%. Qualcomm also owns 6% of WCDMA patents. Qualcomm has always insisted on high patent fees, and the negotiations have been deadlocked again and again, so that many people call it a rogue company. Someone has to ask, what are the advantages of 3G? In fact, the main advantage is one: fast internet access. As we all know, GPRS Internet access speed is very slow, similar to QQ on mobile phones. Browsing large web pages is slow, and downloading MP3 songs is even slower, not to mention movies. 3G mobile phones can not only download music easily, but also watch TV, movies and make video calls smoothly. It is fast and can be used in many applications. As long as the charges are reasonable and universal, 3G will completely change our way of life. How convenient it is to try to do something that only computers can do on mobile phones! Due to various reasons, the issuance of domestic 3G licenses was delayed again and again, and finally, after the reorganization of telecommunications, it was granted a license in 2009. There are three license plates and three 3G licenses issued to three operators at the same time. What are the three standards of China Mobile: TD-SCDMA Unicom: WCDMA Telecom: CDMA 2000? Let's talk about TD-SCDMA first. This thing actually deserves a special book, which has China characteristics. TD-SCDMA means time division-synchronous code division multiple access access in Chinese. TD-SCDMA proposed by China has officially become one of the global 3G standards, and the main technologies of this scheme are concentrated in the hands of Datang Corporation. As an engineer, I am skeptical about the strength of domestic companies, especially those with such a strong official nature. Recalling the end of WAPI can confirm my suspicion. At that time, it was about to be executed, but under various doubts and pressures from international giants, it was postponed indefinitely and indirectly sentenced to death. The biggest problem is that this standard has not been verified and discussed for a long time, and it is dominated by a company that Xi 'an has never heard of, and the technical data of this standard has not been made public. This makes people have to suspect that it is the product of interest groups. I use WIFI to surf the internet now. If the standard was enforced in those years, I doubt whether I could spend more than 100 yuan to buy a wireless router for wireless Internet access. Friends interested in the history of WAPI can Google WAPI. TD-SCDMA, which is dominated by Datang Company, is luckier than WAPI after all, and finally becomes the standard and is operated by mobile. This thing is called national independent property rights. In fact, only 65,438+00% of the patents actually owned by Datang, and Qualcomm claimed to own its patents. And this matter dragged on and on, and finally dragged on to the Olympic Games. When it could not be delayed in 2008, China Mobile conducted a public beta in April 2008, and there were many problems. For example, the network is unstable, the network speed is slow and so on. At the same time, in April 2008, a company closed down and owed its employees several months' salary. Now when it comes to bankruptcy, many people naturally think of the economic crisis. Now, people are numb to bankruptcy and layoffs. However, the financial crisis did not begin at that time. The collapse of this company caused a shock in the communication industry. This company is called Ming Kai, known as Ming Kai Information Technology Co., Ltd. in the industry, and it is a big td chip maker. Described himself as "the first 3G TD chip information product design company specially approved by the government" on the websites of TD Industry Alliance and Camming. The bankruptcy of this company shows that investors have insufficient confidence in the future of TD, and it also shows that the entire industrial chain of TD will be even more imperfect. You know, the information age is the end of the year, and the development of any company is inseparable from the development of the entire industrial chain. For a simple example, if you are a clothing factory, you must consider the procurement, packaging and logistics of fabrics, which also involves dyeing and weaving factories. As a mobile phone terminal, there are many things to do, such as PCB factory, patch factory, key factory, mold factory, speaker factory, antenna factory, various chip factories, battery factory, LCD factory, touch screen factory and so on. If you count the equipment in the base station, there will be more manufacturers involved. Although there is a TD alliance now, a so-called complete industrial chain has been established. However, the overall strength of the industrial chain, especially the technical strength and capital strength, lags far behind the other two standards. If TD builds a large-scale network, whether it can solve the problem in time, realize multi-vendor supply and provide terminals with different prices and styles will directly affect the decision-making and operation strategy of operators. China Mobile is the largest operator in China, so it is not difficult to understand why the government gave TD to it. However, I personally doubt whether the operation can be successful. Let's talk about China Unicom's WCDMA first, which has a lot to do with our buying parallel mobile phones. At the earliest, there was only one operator in China, China Mobile. On July 1995, China Unicom took the lead in launching GSM digital mobile phones in Beijing, Tianjin, Shanghai and Guangzhou. When the two companies began to compete in the GSM network, they reduced the telephone charges and consumers continued to benefit. However, in June 2002, China Unicom's CDMA network was opened. Since then, China Unicom's investment in GSM network has gradually decreased, and the gap between GSM network signal problem and mobile network is getting bigger and bigger. By 2008, the profits of China Unicom and China Mobile will not be a heavyweight at all. On June 2, 2008, China Unicom entered into a framework agreement with China Telecom to sell CDMA services to China Telecom, with a total consideration of 43.8 billion yuan. At the same time, Unicom Group and Unicom New Space and Time signed the Framework Agreement on CDMA Network Transfer with Telecom Group on June 2, 2008, and sold CDMA network assets to Telecom Group with a total consideration of 66.2 billion yuan. The sum of the two is 1 1000 billion yuan. On June 5438+00, 2008, China Unicom and China Netcom formally merged. When the 3G license was issued, the merged new Unicom got the WCDMA license. After buying Unicom's CDMA network, Telecom obtained the license to operate the mobile phone network, and also obtained the license of CDMA2000. WCDMA is a relatively mature technology, and there are mature commercial operations in Hong Kong and Europe. The theoretical maximum speed of WCDMA HSPA version can reach14.4m. At present, among 138 operators who have obtained 3G licenses in the world, 133 have chosen WCDMA, which shows its advantages. Moreover, in terms of terminal mobile phone support, there are many mainstream mobile phones supporting WCDMA at present, and many big manufacturers such as Nokia have many 3G mobile phones supporting WCDMA. Simply put, as long as the parameters indicate that WCDMA2 100 supports Unicom's 3G network, if HSDPA is indicated, it means that it supports faster network speed. Here are some mobile phones supporting WCDMA: KIA 5320XM (the cheapest smartphone supporting 3G video calls at present), 6220Classic, most N series models, most E series models Motorola A3 100 Samsung F480, i900, i85 10 Sony Ericsson W9 10i, X. HTC/Most of the mobile phones listed in dopod in 2008 support WCDMA, because the 3G module will naturally be built into the mobile phone after the 3G license in mainland China was issued. Now only parallel mobile phones support 3G, which will soon change. As long as you buy a mobile phone that supports WCDMA, you can use Unicom's WCDMA network directly without changing your mobile phone after Unicom's 3G network is opened. In this regard, China Unicom has gained an advantage. But in my opinion, the management and operation ability of China Unicom is far less than that of China Mobile. Whether it can rise in this round of reshuffle is still unknown. It should be noted that although the name of WCDMA is very similar to that of CDMA, W-CDMA has little to do with CDMA. On the contrary, CDMA2000 license obtained by telecom has a lot to do with CDMA, and CDMA2000 has the highest technical maturity and advanced nature. It is easy for operators to upgrade the equipment of base stations to support CDMA2000. However, the user's mobile phone may have to be replaced. As far as I know, there is no mobile phone supporting CDMA2000 on the market at present. Most 3G mobile phones are WCDMA. Let's talk about these 3G systems first: TD-SCDMA (China Mobile): currently operating in 10 Olympic cities nationwide. According to the plan of China Mobile, goods will be distributed in 38 cities nationwide in June this year. WCDMA (China Unicom): According to the news released by China Unicom, large and medium-sized cities in China can enjoy the 3G network of WCDMA in May. CDMA2000 (China Telecom): CDMA2000 is a special case, because the 3G network of this standard has no commercial operation experience in China, so there is no mobile phone based on this 3 standard at present. In March this year, telecom users in first-tier cities in China can enjoy the 3G high-speed Internet service of CDMA2000 through network cards.