Apple new iPad3-listing, not only lead to the "powder", as always, sought, but also allow people to have more longing new iPad3-support 4G for 4G. However, listed in Hong Kong the new iPad3 cases only the WiFi version, because Hong Kong did not deploy 4G, Apple's launch in Australia iPad3 cases advertising, because 4G propaganda to mislead the consumer to eat the case. New iPad3 cases listed in mainland China may be there will not be 4G version, because the mainland 4G licenses issued have to wait two or three years.
4G technology is not yet mature
4G is the fourth generation mobile communication and technology, referred to as the set of 3G and WLAN in one, able to transmit high quality video images, and image transmission quality comparable to high-definition television technology products. Its speed will be faster, wider network spectrum, while the higher intelligence, higher communication quality, value-added services can provide more.
In theory, 4G is a continuation of the third generation mobile communication technology 3G, and can provide peak downlink speeds of 1Gbit / s and the move in a fixed state of 100 Mbit / s. In January of this year, two of the International Telecommunication Union certified 4G technology is: LTE-Advanced and WirelessMAN-Advanced (802.16m), these two technologies are not mature in the country, still in its infancy.
In accordance with the deployment of the Chinese Ministry of Industry, China is carrying out the 4G network test has made considerable progress, but put into the official business to take some time before the need for more large-scale trials and commercial trial process.
Licenses needed two or three years
Recently, the Minister of Industry and Miao Wei, publicly stated in an interview: China issued the 4G license may also need two to three years.
Miao Wei, said domestic 4G commercial need to solve two problems, one base station density is not enough, at least three years to have a large-scale commercial basis; two terminals immature, "test terminal is still relatively large, more cost electricity, not easy to use, "said Miao Wei, to further mobilize the handset makers, software vendors, chip makers to actively participate in the industrial chain. Due to the beginning of the domestic 3G development, the poor user experience, and now the development of 4G, "would prefer a little bit slower, a better prepared, allowing users to get a mature product."
Members, China Unicom Chairman Chang Xiaobing in this year's two sessions mentioned only when the 3G penetration rate is high enough, the consumer demand for bandwidth have higher requirements, will have new markets, before we talk about the development of 4G . Ministry of Industry statistics show that domestic 3G penetration (3G users account for the proportion of mobile phone users) is less than 15%, industry sources said the 3G are not popularity, and now is too early to talk about 4G.
3G and 4G will coexist for a long
The key issues encountered by the domestic 4G, 4G, there are many defects in terms of hardware, also need to take a long time to gradually build and improve.
For example, while the International Telecommunication Union to determine the two 4G technology, but because the technology is not yet mature, and each technology contains more than one branch, the world's major communications companies have been debating this, the member organizations of the Union did not form a unified of international standards, which can cause incompatibilities between the various mobile communication systems.
Recently, the new Apple iPad in Australia ads were local consumer protection organizations sued on the grounds that a product that supports LTE and the Australian communications operators with 4G band is not compatible with Apple's propaganda to mislead consumers. Yesterday, Apple modified the content of ads in Australia, removed the contents of the support 4G. According to European media reports, because the band is not uniform, the LTE version of the new iPad does not support 4G test network in most European countries.
Terminal equipment may be 4G is now the most troublesome problem is different from 3G to provide a variety of mobile terminals, the international 4G is currently only a few of several terminals to support domestic addition to test products, the real commercial 4G terminal little. Reference to the course of development of 3G, full access to two or three years from the commercial date of 4G communications technology, consumers can be expected to spend a relatively stable performance of the 4G mobile phone.
In addition, 4G theoretical speed is really very amazing, but the actual speed will be subject to the limitations of the communication system capacity, system capacity is limited, the more mobile phone users, the slower. And 4G no data backbone network, In other words, the theoretical network speed, only a limited local area network can be achieved.
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