How to look at 3G mobile communication applications.doc

How to look at 3G mobile communication applicationsI.INTRODUCTIONMobile services in the growing market demand driven, 3G technology is gradually applied. Commercial 3G network from the current situation, the user market and the expectations of 3G operators and network exists between the practical application of the gap.In the early 3G, many mobile communication experts and scholars are expected to 3G will be a completely universal and flexible, diversified, individualized 5A (Anyone, Anywhere, Anytime, Anydevice, Anything) method of seamless broadband access solutions, the unity in the network, business integration, service diversity, 3G will be the ideal choice for users. However, with the specification development, product realization, network business, service provision and other aspects of development, we can see, the existing WCDMA, cdma2000, TD-SCDMA technology in the application of three are facing difficulties. Clear understanding of these issues in the mobile communications industry for the development of an important position to occupy the mobile operators, has important strategic significance.Second, 3G network technology problemsFrom the perspective of mobile operators, network technologies, including products, technology implementation technology and network operations. Products to achieve the overall performance of technical network operations technologies, and network operators, technology and implementation techniques to promote the product. This system, combined with the understanding of 3G network technology to the problems facing the application of given analysis.Implementation technology for 3G products, the biggest problem is how to achieve various performance soft characteristics of balance and stability. 3G CDMA system, wireless access technology used in the complexity of the system far more than 2G GSM technology. CDMA wireless technology in the way of statistical multiplexing of resources, the user distinguish the use of code words, the user at the time, the frequency spectrum was shared characteristics, in order to reduce this common cause self-interference to achieve high-quality voice user side and data services, 3G networks need in the physical layer, link layer, network layer into a number of key wireless technologies, including power control, soft switching, multi-user detection, smart antennas, radio resource management, and for each of the key technologies not only down to include many types of implementations, and between the horizontal and other technologies associated. Below the power control technology, for example, analysis of product realization technology problems.CDMA power control system to overcome the distance effect a key technology used to achieve a balance of power between users, while ensuring that the system balance between coverage and capacity. Compared with GSM, 3G systems dependent on large power control and power control accuracy and speed directly affects the network performance. The realization of the power control process, the base station and mobile speed of response and variability characteristics of the threshold is to limit the power control the speed of objective factors, the users mobile and wireless environment is to limit the complexity of the power control accuracy of the objective factors. Since both the objective factors exist, the power control in 3G specifications can not give a clear limit. Therefore, the power control technology and applications in the realization was restrictive and uncertainties, which features the one hand, map directly to the 3G network performance, the other hand, with other technologies (such as soft handover) is reflected indirectly related to the 3G network performance in both the network performance will lead to soft features.Technology for 3G network operators, the biggest challenge is how to quickly and continuously to achieve the network planning of the direction and network optimization, empirically. 3G network planning, direction of the difficulty is, not only in planning the technology itself complex, and there is the risk of planning effectiveness. Among them, the risk will be reflected in short-term and long-term of two phases: the recent performance of the network coverage holes, discontinuity of service provision, service quality assurance of uncertainty, the long-term will be reflected in the construction and operation of the network healthy. Obviously, this effect with the GSM network planning there is a big difference.In summary, in the 3G network, wireless access using Code Division Multiple Access (CDMA) technology, in theory, to improve radio resource utilization, improve user service quality has advantages. However, 3G technology itself, the complexity of open technical specifications, product realization and other personalized features, making the 3G network in network performance, operations management, there is an unpredictable and even uncontrollable situation. Therefore, 3G network technology problems will be reflected in network operations technologies and products to achieve the match between technologies, coordination and balance.Third, 3G unified service platform system of the difficulty of achievingDiversified business platform, the difference of the data in the development of a business reality, evolution and business development from a business point of view, this situation will be business development, management, increase the difficulty of the market will be reflected to the user data The feasibility of the business roaming. 3G mobile multimedia data services is typical of the technical norms, and a unified business platform business structure and application of the concept, but also put forward the 3G transmission technology based on IP multimedia service platform, a typical product - IMS. However, 2G to 3G services based on the smooth evolution of ideas and realize the many types of existing 2G and new 3G service platform unified business platform, will face a certain degree of technical risk and implementation difficulties.A unified service platform system technical risk in two ways, one is a unified standard of the existing business architecture business platform compatibility, on the other hand is a typical business platform IMS bearer service quality assurance and user acceptance. Obviously, these two aspects of risk will be affected to varying degrees, from the smooth evolution of the business. For the business structure, its goal is to provide an open, independent networking and technology, scalable programming interface, implementation of existing public safety communications network access. Currently, the two mainstream norms OSA / Parlay and OMAs implementation is still in the discussion, 2G and 3G service platform how the OSA / Parlay is compatible with the OMA operators need to consider. The IMS service platform, IP-based SIP applications easy to unity, but the quality of the business will face challenges, can really become a 3G voice and data is expected to carry a unified platform, which fully reflects the operational flexibility, transparency, Integration, need further validation. A unified service platform system technology will also be other restrictions related to technology, such as billing system support technology and data services to support end-to-technology.Fourth, 3G terminal market development dilemmaThe development of 2G data services from the experience, the terminal is to promote the development of mobile data services is a very important factor. Into the 3G era, the market demand for 3G terminals will become operational support with video, audio as a whole, technical support, compatible with 2G and 3G and multi-service platform to facilitate the agreement to carry the multimedia device. Analysis of the current 3G markets around the world shows that, to some extent, the development of multimedia has become a bottleneck to meet the 3G market demand, mainly in two aspects:(1) terminal technology itself, including the terminal and system compatibility, terminal response time, long standby battery terminals and other factors;(2) On the other hand, the complexity caused by the terminal management costs.Technology development for the terminal, due to the complexity of 3G network technology and soft features, the terminal in compatibility (for example, Uu IOT) and the standard uniform (such as power control the speed and accuracy) is difficult to avoid the problems faced. Meanwhile, end-to-business integration support requirements, making the terminal battery power capacity to be significantly less than (commercial 3G handsets from the current point of view, the 384kbit / s operation, the battery does not last more than 2h). From a global perspective, NTT DoCoMo develop in the terminal leader. However, nearly 2 years from its 3G development process point of view, the 3G terminal problem still hinder the rapid development of the main factors.V. Consideration and response to the challengeFrom the above analysis, 3G technology in the application of the challenge facing the end. From a technical point of view, these challenges will help promote the development of the technology itself. However, from the perspective of 3G operators, 3G makes the development of these challenges there is great risk and difficulties, and even restrict the development of market demand for 3G users.As mobile network operators, need to form a healthy, positive perspective of industry chain thinking. Communications industry goal is to meet the growing market demand, and we need to think first of what 3G user demand, this demand chain issues such as what the world demands. Into the 3G era will be for the user more experience of the era of advanced technology requires practical application, to provide users with mobile Internet exp