3G is the abbreviation of English 3rdGeneration, which refers to the third generation mobile communication technology. Compared with the first generation of analog mobile phones (1G) and the second generation of GSM, TDMA and other digital mobile phones (2G), the third generation of mobile phones generally refers to a new generation of mobile communication systems that combine wireless communication with multimedia communication such as the Internet. It can handle images, music, video streams and other media forms, and provide a variety of information services including web browsing, teleconference, e-commerce and so on. In order to provide this service, the wireless network must be able to support different data transmission speeds, that is, at least 2Mbps (megabits per second), 384kbps (kilobits per second) and 144kbps in indoor, outdoor and driving environments respectively.

Compared with the first generation of analog mobile phones (1G) and the second generation of GSM, TDMA and other digital mobile phones (2G), 3G communication has many names, which are defined by ITU as "IMT-2000" (International Mobile Phone 2000) and called "UMTS" by European telecom giants.

At present, there are three international standards for 3G mobile phones: WCDMA in Europe, CDMA2000 in the United States and TD-SCDMA proposed by scientists in China.

Now "3G communication" is about to become the mantra in people's mouths, so do you know what 3G communication is? The so-called 3G, in fact, is the third generation, which means the third generation digital communication in Chinese. 1995, the first generation of digital mobile phones, can only make voice calls; The second generation digital mobile phones from 1996 to 1997 have added the function of receiving data, such as accepting emails or web pages; The main difference between the third generation and the first two generations is that the speed of transmitting sound and data has increased. It can handle various media forms, such as images, music and video streams, and provide various information services, including web browsing, teleconference and e-commerce. Compared with the first generation analog mobile phones (1G) and the second generation digital mobile phones (2G) such as GSM and TDMA, 3G communication has many names, which are defined by ITU as "IMT-2000" (International Mobile Phone 2000) and called "UMTS" universal mobile telecommunications system by European telecom giants. According to the standard, when the mobile terminal moves at vehicle speed, its data transmission rate is 144kbps, the outdoor stationary or walking speed is 384kbps, and the indoor speed is 2Mbps. However, these requirements do not mean that the available rate of users can reach 2Mbps, because the indoor rate will also depend on the detailed frequency planning in the building and the close cooperation between organizations and operators.

The International Telecommunication Union (ITU) has determined three mainstream wireless interface standards for 3G communication, namely W-CDMA (Wideband Code Division Multiple Access), CDMA2000 (Multicarrier Wavelength Division Multiplexing Spread Spectrum Modulation) and TDS-CDMA (time division-synchronous code division multiple access). Among them, the W-CDMA standard mainly originated from the early third-generation wireless research activities in Europe and Japan. The system is used on the existing GSM network and can be easily converted by system providers. The main supporters of this standard are Europe, Japan and South Korea. At the end of last year, at&; T Mobile Services Branch also announced that it has chosen WCDMA as its third generation service platform. CDMA2000 system is mainly proposed by Qualcomm North America Company, and its construction cost is relatively low. Its main supporters include Japan, South Korea and North America. TD-SCDMA standard was first put forward by China, and cooperated with the international community on the basis of RTT. TD-SCDMA standard is completed and becomes a member of CDMA TDD standard. This is a pioneering work in the field of mobile communication in China, and also China's contribution to the development of the third generation mobile communication. In the competition with 3G standards proposed by Europe and America respectively, TD-SCDMA proposed by China officially became one of the global 3G standards, marking China's leading position in the field of mobile communication.

3G mobile phone is the product of the integration of communication industry and computer industry. Compared with the previous mobile phone, the difference is too great, so more and more people begin to call this new mobile communication product "personal communication terminal". Even the most layman in the communication industry can easily judge whether a mobile phone is the "third generation" from its appearance: the third generation mobile phones have a large color display screen, which is often touch-sensitive. 3G mobile phone can not only complete high-quality daily communication, but also carry out multimedia communication. Users can write and draw directly on the touch screen of 3G mobile phone and send it to another mobile phone, which may take less than one second. Of course, you can also send this information to the computer or download some information from the computer; Users can use 3G mobile phones to surf the Internet directly, check emails or browse the web. There will be many models of 3G mobile phones with their own cameras, which will allow users to hold computer meetings with their mobile phones and even make digital cameras "redundant".

3G communication is a mobile communication service introduced in the mobile communication market after the first generation of analog technology, and it has been introduced into the agenda in the vigorous development of the second generation digital mobile communication market. With the rise of Internet data services and the improvement of fixed access rate (HDSL, ADSL, VDSL), 3G mobile communication system has also seen the dawn of the market, and attracted more and more attention from telecom operators, communication equipment manufacturers and ordinary users.

W—CDMA

That is wideband code division multiple access, also known as CDMADirectSpread, which means wideband code division multiple access. Its supporters are mainly European manufacturers with GSM system, and Japanese companies also participate in it to some extent, including Ericsson, Alcatel, Nokia, Lucent and Nortel in Europe and America, as well as NTT, Fujitsu and Sharp in Japan. This system can be built on the existing GSM network, which can be easily transitioned by system providers. In Asia, where GSM system is quite popular, the acceptance of this new technology is expected to be quite high. Therefore, W-CDMA has inherent market advantages.

3g mobile phone [1][2][3]CDMA2000

CDMA2000, also known as CDMAMulti—Carrier, was proposed by Qualcomm North America Company of the United States, and Motorola, Lucent and Samsung of South Korea all participated in it. At present, South Korea is the leader of this standard. The system originated from the narrow-band CDMAOne digital standard, and can be directly upgraded from the original CDMAOne structure to 3G, with low construction cost. But at present, CDMA is only used in Japan, South Korea and North America, so there are not as many supporters of CDMA2000 as W-CDMA. However, the research and development technology of CDMA2000 is the fastest among the current standards, and many 3G mobile phones have already taken the lead.

TD—SCDMA

This standard is a 3G standard independently formulated by Chinese mainland. On June 29th, 1999, China Institute of Telecommunications Science and Technology (Datang Telecom) proposed to ITU. The standard integrates international leading technologies such as smart wireless, synchronous CDMA and software radio, and has unique advantages in spectrum utilization, business support flexibility, frequency flexibility and cost. In addition, due to the huge market in China, the standard has attracted the attention of major telecom equipment manufacturers, and more than half of the equipment manufacturers in the world have announced that they can support the TD-SCDMA standard.

Current situation of TD-CMMB:

2008-06-438+02-24, Taier Lab of the Ministry of Industry and Information Technology released the first TD-SCDMA mobile phone test report supporting CMMB function in China yesterday, and two technological achievements independently innovated by China, TD-SCDMA and CMMB, were recognized by professional technology. Another company that obtained the certificate of TD-CMMB test conformity report is Yulong Coolpad. At the same time, the reporter learned from reliable sources in the industry that the Ministry of Industry and Information Technology will issue the first mobile phone network access license to TD mobile phones loaded with CMMB as soon as this week.

[Edit this paragraph] Mobile phone manufacturers and brands that currently support 3G

Nokia, Motorola, Samsung, Sony Ericsson, ZTE, Singapore Post, Hisense, Huali, LG Electronics, Datang, Lenovo, Sangfei, Yulong Coolpad, Panda, dopod, Amoi, UT Starcom, TCL, Huawei, Qi Long, Haier, Apple and so on.

[Edit this paragraph] China officially launched domestic 3G.

China Mobile held a press conference today, officially announcing that it will officially launch the social service testing and commercial trial of domestic 3G (TD-SCDMA) in eight Olympic cities including Beijing, Tianjin, Shanghai, Qingdao, Qinhuangdao, Shenyang, Shenzhen and Guangzhou from April 1. China Mobile said that during the trial commercial period, the basic monthly rental fee for domestic 3G mobile phones was 50 yuan/month, and the calling party and the called party were exempted from local basic call charges. The domestic long-distance call charge is 0.07 yuan /6 seconds.

On June 5438+ 10, 2007, 3G mobile phone appeared in China International Communication Equipment Technology Exhibition.

"I have to consider saving money to buy a mobile phone again." Lv Xinxin, who claimed to have used 12 mobile phone, said in the TD-SCDMA (TD) demonstration hall outside the south gate of Tsinghua, "I use Apple's iPhone now, and I usually have a Nokia N95 as a backup. I thought the N95 I brought back from Hong Kong was already 3G, so I can use it directly when I bring it back. However, TD standard has just been tried out in mainland China, but N95 is a popular WCDMA in Europe. This means that I have to buy a mobile phone, which is really troublesome. " However, on April 1 day, when China Mobile released the TD trial commercial number, the people who flocked to China Mobile Business Hall did not feel any trouble. In eight pilot cities across the country, nearly 20,000 people took the so-called social business test. Among the first people who ate crabs, not many actually bought TD mobile phones. More people come with 3G mobile phone numbers, 157, which has become a new reselling variety in Chinese mobile phone culture.

"My old number 139 is said to be worth 1 10,000 yuan." Mr. Zhang, the first batch to grab two 157 numbers, replied in a telephone interview, "After all, the number 157 is a scarce resource now, even if it is not used at ordinary times, it will not suffer. Moreover, the 3G mobile phone that is being tried out now subsidizes 800 yuan's phone bill every month, and even rewards 80 yuan for playing 500 minutes. This offer can last for 5 months. " But Mr. Zhang bought only one mobile phone with two 3G mobile phone numbers. In his view, TD's mobile phone is too ugly and stupid now. In fact, the first batch of users who got TD 3G mobile phone numbers didn't really buy mobile phones. It is roughly estimated by the people that 45% of the first testers are using TD mobile phones, and more people choose to use 3G mobile phones with WCDMA function. Except that they can't enjoy 3G network data traffic, it's no problem to make a phone call.

Why don't people like the first batch of TD 3G mobile phones? No one is willing to answer this question, whether it is the official of China Mobile or the TD industry alliance behind the TD standard. Testing in the trial stage is the best excuse. On the contrary, the first batch of mobile phone terminal manufacturers who participated in the test launched fierce competition for who was the first TD mobile phone to be sold. Hisense attaches great importance to this stunt. They think their HS-T68 is the first 3G mobile phone that users bought. The first user bought Hisense's 3G mobile phone in Qinhuangdao, 1800 yuan. However, ZTE is a little unconvinced. In their view, its U980 not only became the most expensive high-end TD mobile phone at a high price of 3,800 yuan, but also had the best performance among TD mobile phones in the current testing stage. In contrast, Lenovo mobile phones and NewPost are much lower-key. Many users who choose to buy these two brands value the low price of 1800 yuan and the test subsidy of China Mobile 200 yuan. As the only two foreign mobile phone brands, Samsung and LG have almost become the brands that many ordinary users who intend to buy TD mobile phones stop to study and comment the most. After all, from the brand point of view, these two Korean brands have attracted a large number of GSM and CDMA users. But there are not many users who can really choose to consume these two brands. Test users with a little knowledge of telecommunications know that TD, as a local 3G standard in China, definitely has technical advantages in the test stage.

In fact, some tendencies can be noticed from the distribution of the first batch of TD mobile phone purchases of China Mobile. Unknown new posts won the bid for 2 1 0,000 units at one time, accounting for 35% of the first batch of tested mobile phones, while the other two domestic mobile phone brands Lenovo and Hisense got the list of 1 0,500 units respectively. Although ZTE has only 9,000 sets, it can also add 5,000 sets of TD network cards, which is no less than the purchase volume of New Post. On the contrary, Samsung and LG Electronics each have 4,500 sets, making them rare niche mobile phones. On the other hand, Nokia, Motorola and Sony Ericsson, the three major GSM mobile phone brands, are absent. Regarding the future of TD mobile phones, Deng Yongqiang, global vice president of Nokia, once said in an interview: "Nokia is good at WCDMA 3G standards in Europe. Since China 3G will definitely launch TD, Nokia, as the largest mobile phone manufacturer in the world, has no reason not to participate in the research and development of TD mobile phones. " It is also based on this view that Nokia made a joint venture with China Putian early, trying to enter the core circle of TD at any time through China Putian after the domestic 3G license and other policy issues were clarified. Compared with Nokia, Motorola and other first-line international mobile phone brands, Samsung and LG, the first batch to participate in the test, performed very actively, largely due to the small market capacity in South Korea. Another reason is the expectation of TD standard in Korean telecom field. After all, the Korean mobile phone industry has long been subject to the American CDMA standard and has no right to speak in WCDMA dominated by Europeans. Wang Hao, manager of 3G Department of LG Electronics Mobile Communications Division, said in an interview: "LG mobile phones have always been at the forefront in the 3G field. As early as the 2002 World Cup, we provided a prototype of WCDMA, and now LG's 3G mobile phone shipments have ranked first in Europe. For TD with China characteristics, we LG have been very active in it, which can be traced back to 200 1 at the earliest. Now we are a senior member of TD industry forum, so you will see LG become one of the first few international brands to participate in the test. For the commercialization of TD, we think it depends on the timetable for the government to issue 3G licenses and the business strategy of telecom operators. " It is based on the vague technical background of testing that domestic mobile phones have a rare local advantage, so 3G testing of TD mobile phones has become a long-lost stage for domestic mobile phones. In addition to the first four domestic brands participating in network testing, Amoi, Konka, Bird and many other domestic mobile phone manufacturers that started to decline three years ago are all excited again. At least, the hesitation of international mobile phone giants to TD standard has given these domestic mobile phone brands a chance to make a comeback.

Different from the excitement of domestic mobile phones, some participants in the downstream of the telecom industry chain also expressed some concerns, especially in mobile phone stores such as Dixintong. In their view, the current sales method of the first batch of TD mobile phones is "dangerous". Future 3G telecom operators, such as China Mobile, can abandon the traditional idea of selling mobile phones at any time and adopt the subscription method, that is, retail channels no longer have the dominant position in selling mobile phones. In view of the characteristics of 3G mobile phones, operators and mobile phone terminal manufacturers will be more closely bound. In addition to the customization of mobile phone software, operators may even directly participate in mobile phone sales. Gao Wei, who once worked in the mobile phone department of Siemens, analyzed: "Once the 3G license is issued, the operator can tighten the control right at any time, which may exceed the customization mode currently adopted by China Mobile in GSM network. Whether you are Nokia or Motorola, you must obtain the license of China Mobile 3G mobile phone. In this way, from the software supporting and sales channels, the dominant position is completely lost. In addition to playing a mobile phone brand, you can also embed your own Internet interface in 3G mobile phones, and the power that mobile phone manufacturers can control can only be less than now. " In fact, the mobile phone market in China has always been the most open in the world, and the retail market is also the most active. Telecom giants such as Vodafone in Britain, T-Mobile in Germany and DOCOMO in Japan have already strengthened the authority of 3G customization. Many 3G mobile phones sold in Europe do not have their own brands, but are branded by operators, so users' choice of mobile phone styles and brands is relatively less open than the current GSM mobile phone market in China.

Similar concerns exist not only in mobile phone manufacturers and retail terminals, but also in many R&D companies related to mobile phone terminals. Quanpei University, which received a venture capital investment plan of 65,438+0,000 US dollars to do research and development of 3G value-added applications, expressed similar concerns: "Everyone knows the national significance of TD to 3G in China and the current style limitations of TD mobile phones, but no one knows whether it can be recognized by the market. Too many stakeholders expect WCDMA to be dominated by Europeans. Besides, China Mobile may never get a WCDMA license, and no one dares to invest early. Everyone is waiting for the situation to be clear. Anyway, WCDMA license will be issued sooner or later. Even if China Mobile can't get it, there are China Telecom and Netcom. "

Different from the calculation of mobile phone terminal manufacturers and sales channels, people who have made money in 3G mobile phone applications of GSM and CDMA have begun to calculate how to guide the ecological culture of 3G mobile phones in China. These include thumb business stories sent by SMS, and mobile internet tycoons who once bet on WAP. Similar to creating short message culture with China characteristics, everyone is trying to find 3G mobile phone culture with China characteristics. Ni Chuzhong, who used to be a mobile phone color ring back tone business, expressed his opinion at a party in SP circle: "No killer application has been found in Europe and America, whether it is online music download or 3G mobile online games, it is too small. Be sure to find something that can impress most people. Just like the ringtone and SMS voting two years ago, the application must be very cheap, and we can play it once for a few cents. There are many mobile phone users in China, and the business model must meet the business needs of small profits but quick turnover. " For the birth of the 3G version of Thumb Culture, the Internet circle is also eager to try, especially those websites that operate instant messaging and virtual communities. In their view, TD's attractive network bandwidth advantage can be transformed into Internet advantage at any time. In this case, video chat, for example, is naive. If you can manage your avatar with 3G mobile phone at any time, you may surpass Facebook, the most popular dating community in America. More ambitious are those video websites. Although the entire video website industry has been worrying about its license all day, this does not stop several big companies with broadcasting background from drawing cakes. According to their ideas, the high bandwidth of 3G mobile phone will widen the gap between telecommunications and broadcasting, and the mobile phone will be the best screen and the most portable billboard, which is likely to build a brand-new 3G culture in China.

The Ministry of Industry and Information Technology issued three 3G licenses.

On June 7th, 2009, 65438, the Ministry of Industry and Information Technology issued three 3G licenses for China Mobile, China Telecom and China Unicom, which marked the official entry of China into the 3G era.

Among them, China Mobile was approved to add 3G licenses based on TD-SCDMA technology, China Telecom added 3G licenses based on CDMA2000 technology, and China Unicom added 3G licenses based on WCDMA technology. TD-SCDMA is a 3G technical standard with independent property rights in China.

On May 7th, 2009, China entered the 3G era. [2]

On May 17, China Unicom officially started to operate 3G services. At this point, the three major domestic operators have all demonstrated their 3G brands, and the 3G era of "three pillars" in China has officially arrived. Announce that China has entered the 3G era in an all-round way.

[Edit this paragraph ]3G is numbered.

On April 1 day, China Mobile issued numbers in eight cities, namely, Beijing, Shanghai, Tianjin, Shenyang, Guangzhou, Shenzhen, Qingdao and Qinhuangdao, and officially launched the social service test and commercial trial of TD-SCDMA. Under the focus of expectation, wait-and-see and doubt, the 3G curtain in China has finally been officially opened by TD-SCDMA, a domestic 3G standard that has experienced a decade-long technological maturity process. China's 2008 will not only attract worldwide attention because of the Olympic Games, but also go down in history as "the first year of 3G".

It is understood that Beijing released 15000 and Shanghai released 10000. However, in a short period of one week, 3G has exposed many problems, such as unstable signals and intermittent calls ... These problems have also made TD the focus of people's attention.

TD has been growing in controversy since its birth. Today, TD has been put into commercial trial, and the real test has just begun.

The Technology Used by 3G Mobile Phone in China

TD-scdma- time division-synchronous code division multiple access (time division-synchronous code division multiple access technology).

TD-SCDMA, as the third generation mobile communication standard (3G for short) proposed by China, has completed a series of international standardization work such as expert group evaluation, ITU approval and release, integration with 3GPP (3rd generation partnership project) system and introduction of new technical features since 1998 was formally submitted to ITU, thus making TD-SCDMA the first standard proposed by China. This is an important milestone in the telecom history of China. (Note: 3G*** has three international standards, and the other two are CDMA2000 led by the United States and WCDMA led by Europe. )

14: 30 news 10/7, 2009, the Ministry of Industry and Information Technology issued three 3G licenses to China Mobile, China Telecom and China Unicom, which marked the official entry of China into the 3G era.

Among them, China Mobile was granted TD-SCDMA license, China Unicom was granted WCDMA license, and China Telecom was granted CDMA2000 license. TD-SCDMA is a 3G standard with independent property rights in China.

Previously, on the morning of June 5438+February 3, 2008/KLOC-0, the executive meeting of the State Council discussed and agreed to start the third generation mobile communication (3G) license issuance, and made it clear that the Ministry of Industry and Information Technology would do the relevant work according to the procedures. In the afternoon, the Ministry of Industry and Information Technology immediately held a special meeting to seriously study and implement the spirit of the the State Council executive meeting.

According to the Ministry of Industry and Information Technology, TD-SCDMA, WCDMA and CDMA2000 licenses will be issued according to the deployment and requirements of the State Council, legal procedures and enterprise applications, so as to stimulate domestic demand, promote economic growth and optimize the competitive structure of the telecommunications market.

[Edit this paragraph ]3G related issues analysis

What is a 3G license?

3G license is the business license right of a new generation of mobile communication system, which combines wireless communication with multimedia communication such as Internet. Just like the business licenses of various industries, you must have the permission of the relevant state departments to operate this business.

Why do you want to issue 3G licenses?

Judging from the market space in China, 3G licensing is conducive to promoting competition in China telecom market;

3G licensing is conducive to the effective use of frequency;

3G licensing is beneficial to the standard number segment, which will be from 15 to18;

3G licensing is conducive to controlling operating costs and related to the development of China's mobile communication industry.

Conditions for obtaining a 3G license

Any operator who wants to obtain a 3G license should have five advantages:

First, the network strength; Second, the strength of funds is needed; The third is technical strength; The fourth is business strength; The fifth is the strength of users.

At present, the PHS systems of China Telecom, China Netcom, China Mobile and China Unicom all have 3G operation conditions.

Which department has the right to issue 3G licenses?

Telecommunications administration of the Ministry of Information Industry

What does an operator have the right to do after obtaining a 3G license?

After obtaining 3G license, operators can operate images, music and videos, and provide web browsing, teleconference and e-commerce information services. Video conference system based on internet. Home network telephone service, etc.

Do domestic mobile phone manufacturers have the right to manufacture 3G mobile phones now?

According to the requirements of China's "Several Provisions on Examination and Approval of Mobile Communication Systems and Terminal Investment Projects", the registered capital is not less than 200 million yuan; Have a corresponding perfect development platform and R&D center; It has complete hardware design ability of complete machine and unit circuit, software development ability based on chipset and protocol stack and structural appearance design ability, and can apply to the National Development and Reform Commission and the Ministry of Information Technology for 3G and other mobile communication systems and terminal investment projects.

China's 3G standard -TD-SCDMA

3G is the abbreviation of English 3rdGeneration, which stands for the third generation mobile communication technology. Mobile phones have experienced the first generation of analog mobile phones (1G) and the second generation of digital mobile phones (2G) such as GSM and TDMA. 3G refers to a new generation of mobile communication system which combines wireless communication with multimedia communication such as Internet, and some people call it "wireless Internet" for short.

3G can handle various media forms, such as images, voice and video streams, and provide various information services, including web browsing, teleconference and e-commerce. Its main targets are real-time video, high-speed multimedia and mobile Internet access services.

In 2000, the International Telecommunication Union (ITU) determined three mainstream 3G international standards: WCDMA, CDMA2000 and TD-SCDMA. Among them, TD-SCDMA was put forward by our country, which is called the technical standard of independent innovation. WCDMA was put forward by Europe, and CDMA2000 was put forward by the United States.

Complete record

TD industrialization process

TD-SCDMA standard was put forward by Datang Telecom Technology Industry Group, and the industry alliance was established in 2002, which promoted the industry to invest in the actual research and development of products.

■ Since 2003, the former Ministry of Information Industry has organized four 3G technology tests, which effectively promoted the maturity of technologies and products.

■ In 2006, China Telecom, China Netcom and China Mobile started the TD-SCDMA pilot networking test in Baoding, Qingdao and Xiamen, which confirmed that TD-SCDMA technology can realize large-scale networking.

■ In 2007, China Mobile carried out large-scale network construction in eight cities, China Telecom and China Netcom in Baoding and Qingdao, which started the formal pace of commercialization. This is the first phase of mobile network construction in China, with a planned investment of 654.38+0.5 billion.

■ At the end of 2008, China Mobile started the second phase of TD-SCDMA investment and started the construction of the second phase of TD project in an all-round way. It is estimated that in the first half of 2009, 38 cities, including provincial capitals and cities with separate plans, will realize TD network coverage. At the same time, China Mobile Research Institute has formulated the TD network construction and development plan for the next three years. At the same time of network construction, network quality is constantly optimized. At present, the coverage of TD network in ten cities has reached 95% of the coverage of 2G network in the same region, the voice connection rate has exceeded 95%, and the dropped call rate has dropped to 3.6%.

■ On June 5438+ 10/0, 2009, China Mobile announced the third-phase network construction plan. It is estimated that 58.8 billion yuan will be invested to build about 60,000 TD-SCDMA base stations in 2009, bringing the total number of TD-SCDMA network base stations to more than 80,000, and realizing the network coverage of 238 business hotspots in prefecture-level cities.

Video service

■ Mobile video: HD video and audio programs on demand, with controllable progress.

■ Video * * * Enjoy: provide video conference.

■ Video phone: Use a fixed phone with a display screen or another 3G mobile phone to make video calls.

TD-SCDMA

Not just by phone.

Watch it on TV

You can watch TV and video streaming programs smoothly.

Online shopping mobile wallet

"Bundle" mobile phone numbers with payment accounts such as bank cards to provide mobile payment services.

Download music online games

Real-time navigation and remote monitoring

Users can get bus location notification or check the crowd situation in remote and specific places.

Data card business will become a hot spot.

The launch of 3G service will greatly improve the speed of unlimited Internet access for users. For example, some data cards support TD-SCDMA HSDPA service, and the transmission rate is very high, and the data transmission speed can be as high as 2.8M It is understood that many users choose 188 number, and most of them regard TD network card as a must-buy accessory.