The development status of post 3g

China's 3G market may bring the total value of the network infrastructure will be more than 500 billion yuan, terminal equipment sales will also reach the total of 500 billion yuan. In the face of this huge market of more than 1 trillion yuan, the communications giants have no reason not to move, not for the cry. The 3G network technology test, which began last October, has come to a close in China, but the 3G technology will be difficult to achieve in a short time. In the meantime, the edge has been valued by people again. The postponement of the 3G license plate and the extension of some 3G network construction still cannot affect the enthusiasm of the equipment manufacturers at home and abroad, and the people also put their eyes on 4G or even farther.

Development General statement:

The three mainstream technical standards of 3G--WCDMA, CDMA2000 and TD-SCDMA are technologically different. The Chinese government has allowed major telecom operators to choose from China's 3G technical standards in the light of market conditions and their own needs. But the future of China's 3G market is fraught with uncertainty as the Chinese government has yet to decide what technical standards to use for the future 3G network. The voice of the mixed network is getting higher. Manufacturers are starting to seek support for two or even three kinds of 3G technical standards. Ericsson, Nokia and Alcatel's hardcore supporters have said they are also developing at the same time in CDMA2000, and are keeping a close eye on TD-SCDMA technology. Qualcomm, Nortel Network of these CDMA2000 companies, but also the eyes and money to the other two 3G standard. (Computer science)

In addition, people also look at the edge and 4G technology.

Since 2003, the once-neglected edge has gradually taken the step of commercialization. By the middle of May, 78 operators in 53 countries have pledged to use edge technology and 16 operators have opened their edge commercial networks, according to the Global Mobile Equipment Merchants Association (GSA) statistics. This indicates that the edge of 2.75G technology is playing an increasingly important role in the process of GSM's evolution to WCDMA.

Edge is a kind of data enhancement technology based on GSM/GPRS, which can effectively improve the data transmission rate and throughput of the network, and enhance the support ability of the service. From GPRS upgrade to edge, you can continue to use the existing spectrum of GSM/GPRS, do not have to large-scale adjustment of the network structure, as long as the Change access network and terminal parts, the GPRS protocol to the edge of the agreement can be converted. This means that the upgrade from GPRS to edge is less expensive and can protect the existing network investment of operators.

In the case of 3G commercial delay and GPRS is insufficient in the data service support capability, the edge of the transition technology between GPRS and WCDMA has aroused the concern of the operators again. Especially for those who do not get 3G license but not satisfied with the existing GPRS mobile data business support capabilities of the operators, based on GPRS and higher than GPRS edge, they have become more and more attractive. GSM equipment manufacturers to promote edge, there is an important reason, that is, edge to a certain extent, can contend with CDMA in the global development, consolidate the GSM standard system in the global dominant position. CDMA networks have developed rapidly in North America and Asia in the past few years, when GSM operators in Europe fully deployed GPRS. The evolution route of CDMA network to 3G is from CDMA one to CDMA 1x, then to CDMA 1xev-do and CDMA 1XEV-DV. From the recent two years, the so-called 2.75G CDMA 1x in Japan and South Korea has been successful application, showing a more powerful than GPRS data business support capabilities. First of all, from the actual network rate, CDMA 1x Average rate of 70kbit/s above, can support multimedia and video services, so some CDMA 1x operators even think they provide 3G service. Secondly, due to the focus on building a new industrial value chain, CDMA 1x has embarked on a benign development of the track, operators have achieved good market returns. This accelerates the evolution of CDMA network from CDMA 1x to CDMA 1xev-do and 1XEV-DV to a certain extent. So according to this trend development, CDMA network will shake the advantage that GSM network once had, change the pattern of current market competition. From the point of view of the competition between the two major mobile communication standard systems, only the edge can make GSM operators have the ability to contend with CDMA 1x operators in the case of WCDMA without large-scale commercial.

From another point of view, with the increasing expansion of CDMA network, the range of CDMA network roaming is expanding, but not every GSM operator can get 3G license. In order to improve their market competitiveness, some small and medium-sized GSM operators are completely likely to select technical standards, and thus entered the CDMA camp, which is the most worried about GSM equipment manufacturers. Today, GSM devices are building edge labs around the world to arouse the attention of operators who do not have 3G licenses but are eager to upgrade to more advanced mobile communications systems.

To date, 3G standards and specifications have been agreed and entered into business. But it should also be seen that 3G system also has its limitations, such as: the lack of global standards, the voice switching architecture used in 3G still inherited the second generation (2G) circuit switching, rather than pure IP mode, because of the multi-user interference, CDMA difficult to achieve a high rate of communication. Therefore, in view of the above various shortcomings, the concept of 4G system should have the following characteristics:

(1) High speed, high capacity: expert estimate, for a large range of high-speed mobile users (250km/h), the data rate is 2mbit/s, for the medium-speed mobile User (60km/h), the data rate is 20mbit/s, for Low-speed mobile users (indoor or pedestrian), the data rate is 100Mbit /S. Its capacity is at least 10 times times the capacity of the 3G system.

(2) More smooth compatibility: 4G communication system should have the characteristics of global roaming, open Interface, able to interconnect with a variety of networks, terminal diversification and smooth transition from 3G.

3. Seamless connection between different systems in high-speed mobile: Users can access the system on demand, and seamlessly switch between different systems to transmit high-speed multimedia business data.

(4) Highly intelligent Network: 4G network system is a highly autonomous, adaptive network, it has good reconfiguration, scalability, self-organization, etc., to meet the different environments, different users of the communication needs.

(5) Full concentration of services: personal communications, information systems, broadcasting and entertainment business will be integrated into the whole, services and applications will be more extensive, safe, convenient and personalized.

The basic task of 4G mobile network is to be able to receive and obtain the call to the terminal, to establish its most effective communication path between multiple running networks (platforms) or between multiple wireless interfaces, and to locate and track it in real time. In the process of mobile communication, the mobile network also has to maintain a good seamless connection ability to ensure the high quality of data transmission, high-speed rate. 4G mobile network will be based on multi-layer cellular structure, through multiple wireless interfaces, by a number of business providers and many network operators to provide multimedia services. Its core network is a network based on all IP, so the core network is independent of a variety of specific wireless access schemes, can provide end-to-end IP services, with the existing core network and PSTN coexist. Various access systems for different services are connected to the core ip-based network through the multimedia Access system to form a public, flexible and scalable platform.

4G system has been used in a variety of core technology is not perfect, the gradual improvement of these technologies is a long-term process. For example, the mobile IP technology of the core network, for the fourth generation mobile communication system, the mobile IP technology lacks the real-time position management and the fast seamless handoff mechanism support. In addition, the integrated service/RSVP technology and differentiated business technology used in the mobile IP environment are also one of the important problems to be solved, and these technologies are not optimal on the mobile IP platform.