4G communication technology does not depart from previous communication technologies, but rather builds on traditional communication technologies and utilizes a number of new ones to continually improve the efficiency and functionality of wireless communication networks. If the current 3G can provide us with a high-speed transmission of the wireless communications environment, then 4G communications will be an ultra-high-speed wireless network, a kind of cable-free information superhighway, this new network allows telephone users to wireless and three-dimensional space virtual reality connection.
Compared with traditional communication technology, the most obvious advantage of 4G communication technology is the call quality and data communication speed. However, in terms of call quality, the current cell phone consumers are still acceptable. With the development and application of technology, the call quality of cell phones in the existing mobile phone network is further improved. The high speed of data communication is indeed a great advantage, with its maximum data transfer rate of 100 Mbit/s, which is nothing short of incredible. Also the future cost of 4G communication is lower than the current cost of communication due to the advancement of the technology which ensures that the cost investment is greatly reduced.
4G communication technology will be the third generation after the evolution of another wireless communication technology, its development has a clearer goal: to improve the speed of mobile devices to access the Internet wirelessly - according to the 3G market in three phases to go to the development plan, 3G multimedia services will enter the third stage of development after 10 years, when covering the world's 3G network has been built basically, the global More than 25% of the world's population is using third-generation mobile communication systems. In developed countries, the penetration rate of 3G services will be more than 60%, then there is a need to have a newer generation of systems to further improve the quality of service.
In order to take full advantage of the advanced services brought by 4G communications, we must also rely on a variety of 4G terminals to realize, and many communications operators see the huge market potential of the future communications, they have now begun to focus on the production of 4G communications terminals, such as the production of high-speed packet communication function of the production of small terminals, production of video phones corresponding to the camera, as well as movie and television video products. These include small terminals with high-speed packet communication functions, terminals for video telephones equipped with video cameras, video transmission services for movies and television, and card-type data communication terminals that are compatible with computers. With these communication terminals, cell phone users can enjoy high quality communication anytime, anywhere, and roam as they please.
The main advantages of the fourth-generation communication technology
If 2G and 3G communication is insignificant for the development of human informatization, then the future of 4G communication gives us the real freedom of communication, and will completely change our way of life and even the social pattern. Currently being conceived in the 4G communication has the following characteristics:
1, faster communication speed
Since the original purpose of the research 4G communication is to improve the rate of cellular phones and other mobile devices to access the Internet wirelessly, so the 4G communication gives people the most impressive features than it has a faster wireless communication speed. From the mobile communication system data transmission rate for comparison, the first generation of analog only provide voice services; the second generation of digital mobile communication system transmission rate is only 9.6Kbps, up to 32Kbps, such as PHS; and the third generation of mobile communication system data transmission rate can reach 2Mbps; experts predict that the fourth generation of mobile communication system can reach 10Mbps to 20Mbps, and even the highest can be 10Mbps to 20Mbps. 20Mbps, and even the highest can reach up to 100Mbps per second speed transmission of wireless information, this speed will be equivalent to the current cell phone transmission speed of about 10,000 times.
2, the network spectrum is wider
To make 4G communications to reach 100Mbps transmission, communications operators must be in the 3G communications network, on the basis of a substantial transformation and research in order to make the 4G network in the communication bandwidth than the 3G network cellular system bandwidth is much higher. According to executives at AT&T, which is studying 4G communications, it is estimated that each 4G channel will occupy 100 MHz of spectrum, which is equivalent to 20 times that of a W-CDMA 3G network.
3, communication is more flexible
From a strict sense, the function of the 4G cell phone, can not be simply classified as a "telephone" category, after all, the transmission of voice data is only one of the functions of the 4G cell phone, so the future of the 4G cell phone should be regarded as a mini-computer, and the 4G cell phone from the appearance and style, the 4G mobile phone, the 4G cell phone, the 4G cell phone is a small computer, and the 4G mobile phone. Cell phone from the appearance and style, there will be more amazing breakthroughs, we can imagine is, glasses, watches, makeup box, travel shoes, to the convenience and personality as the premise, any one of the items you can see may become a 4G terminal, just we do not know how to call it. The future of 4G communication will allow us not only to communicate anywhere, anytime, but also to download and transfer information, drawings and images in both directions, and of course, to play games with strangers we've never met before. You may have the frustration of being locked into an online location system forever, but that's negligible compared to the convenience and security of the maps it provides.
4, higher intelligence
The fourth generation of mobile communications is more intelligent, not only in the design and operation of the terminal equipment of 4G communications with intelligent, for example, the menu and scrolling operation will be much less dependent on the degree of more important 4G cell phones can achieve many unimaginable functions. For example, 4G cell phone will be able to remind the owner of the phone according to the environment, time and other set factors what to do at this time, or what not to do, 4G cell phone can be the cinema box office information, directly downloaded to the PDA, these information can be the current ticket sales, seating conditions show clearly, we can buy their own satisfaction according to the information to online movie tickets! The 4G cell phone can be viewed as a portable TV for watching live sports and other events.
5, compatibility can be smoother
To make 4G communication as soon as possible to be accepted by the people, not only to consider its powerful features, but also to take into account the basis of the existing communications, so that more existing communications users in the case of the least investment will be able to easily transition to 4G communication. Therefore, from this point of view, the future of the fourth generation of mobile communication system should have global roaming, open interfaces, with a variety of network interconnection, terminal diversification, and can be a smooth transition from the second generation and other characteristics.
6, to provide a variety of proliferation of services
4G communication is not from the basis of 3G communication after a simple upgrade and evolved, their core construction technology is fundamentally different, the 3G mobile communication system is mainly CDMA as the core technology, while the 4G mobile communication system technology to orthogonal multi-tasking frequency-division technology (OFDM) is the most popular, the use of this technology, people can realize, for example, wireless area ring. This technology allows people to realize wireless communication proliferation services such as wireless area loop (WLL), digital audio broadcasting (DAB), etc.; however, considering the transition with 3G communication, the fourth generation mobile communication system will not only use OFDM technology in the future, CDMA technology will be in the fourth generation mobile communication system, and OFDM technology with each other in order to play a greater role in the fourth generation mobile communication system. Even the future of the fourth generation of mobile communication system will have a new integrated technology such as OFDM/CDMA generation, the aforementioned digital audio broadcasting, in fact, it is really the use of technology is the integration of OFDM/FDMA technology, the same is the use of the combination of the two technologies. Therefore, in the future, the fourth-generation mobile communication system with OFDM as the core technology will also combine the advantages of the two technologies, and part of it will be the extension technology of CDMA.
7, the realization of higher-quality multimedia communications
Although the third-generation mobile communication system can also realize a variety of multimedia communications, but the future of 4G communications to meet the third generation of mobile communications can not yet be achieved in the coverage, quality of communications, the cost of support for high-speed data and high-resolution multimedia services needs, the fourth-generation mobile communication system to provide wireless multimedia communication services will include voice, data, video, and other services. The wireless multimedia communication service provided by the fourth generation mobile communication system will include voice, data, images and other large amounts of information transmitted through the broadband channel, for which the future fourth generation mobile communication system is also called "multimedia mobile communication". The fourth generation of mobile communication is not only to cope with the increase in the number of users, but also to cope with the demand for multimedia transmission, including, of course, the requirement for communication quality. To summarize, the first must be able to accommodate the huge number of users in the market, improve the existing poor communication quality, as well as to meet the requirements of high-speed data transmission.
8, more efficient use of frequency
Compared with the third generation of mobile communications technology, the fourth generation of mobile communications technology in the development of the process of using and introducing a number of powerful breakthroughs, such as a number of fiber optic communications product companies in order to further improve the width of the backbone bandwidth of the wireless Internet, the introduction of switching layer level technology, which can cover different types of communication interfaces. This means that the fourth generation is primarily a routing-based network architecture. Due to the utilization of several different technologies, radio frequencies are used much more efficiently than in second and third generation systems. According to the most optimistic scenario estimates, this effectiveness allows more people to do more things with the same amount of wireless spectrum as before, and to do these things quite quickly. Researchers say download rates of 5Mbps to 10Mbps are possible.
9. Cheaper communications
Since 4G communications not only solves the compatibility problem with 3G communications, allowing more existing communications users to easily upgrade to 4G communications, but also introduces a number of cutting-edge communications technologies that ensure that 4G communications can offer These technologies ensure that 4G offers a highly flexible system operation, making it much easier and quicker to deploy than other technologies; and in building 4G network systems, communications operators will be looking to build directly on top of the infrastructure of 3G networks, adopting a step-by-step approach that effectively reduces costs for both operators and users. According to the researchers, the cost of certain services such as wireless instant connectivity for 4G communications will be cheaper than for 3G communications.