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At present, Beijing University of Posts and Telecommunications, in conjunction with the Institute of Computing Technology of the Chinese Academy of Sciences, China Mobile Research Institute, Tsinghua University, Datang Telecommunications, Telecommunication Transmission Research Institute of the Ministry of Industry and Information Technology, Huazhong University of Science and Technology, and other research institutes are actively applying for the national key science and technology special project , Give a package of solutions and algorithms for TD-LTE + SON key technology.
The pre-commercial equipment basically has the SON function. China Mobile has actively participated in the NGMN (next generaTIon mobile network, next-generation mobile communication network) organization's needs and technology research at the beginning of the SON technology research. The technical research and international standardization work of the self-organizing network and a number of related technical patents and 3GPP standard documents have promoted and promoted the research and maturity of the self-organized network technology.
In terms of the implementation of self-organizing network technology, China Mobile has led a number of universities and equipment suppliers to conduct in-depth research on self-organizing network technology. It also actively guides and guides through laboratory tests and field tests of LTE and TD-SCDMA networks. Promote wireless equipment suppliers to implement self-organizing network technology according to the needs of operators (Figure 1 is the architecture of self-organizing network). In early 2010, China Mobile had completed laboratory tests on SON use cases of various vendors including eNB self-configuration, PCI self-optimization, and ANR. Through testing and verification, pre-commercial devices of various vendors have basically been equipped with SON functions. 
The SOCRATE project is based on the study of self-organizing technology under the LTE system. By integrating the three relatively independent steps of network planning, network configuration and network optimization in a traditional network into an independent and unified automated process, the performance of the network is optimized and labor is reduced. The purpose of operational complexity. The 3GPP protocol also defines related user scenarios for self-configuration, self-optimization, and self-healing. In contrast, NGMN divides self-configuration, self-optimization, and self-healing into four relatively independent aspects of network planning, equipment deployment, self-optimization, and maintenance, and specifies their respective user scenarios and requirements. The IEEE802.16m standard's discussion on SON is limited to the measurement and reporting of air interface performance indicators, and the corresponding automatic adjustment of base station parameters.
From the perspective of standardization status, the current standardization work of SON is still mainly carried out in 3GPP, and the focus includes the application scenarios and implementation solutions of SON in wireless networks, and the impact of the corresponding S1 / X2 interface. Interface requirements.
SON decides 4G network performance Under the traditional wireless network planning and optimizing working methods, the huge amount of network parameters can hardly be operated manually, and the network planning, optimization and operating costs are getting higher and higher. Operators not only focus on performance, but also on the efficiency of maintenance operations. How to reduce O & M costs has become a priority for operators.
At present, there are SON research, standardization work and related test networks, but they are all oriented to 3G or 3G enhanced evolution systems. Some 3G and its enhanced evolution systems use SON technology to improve network performance and simplify network construction and operation and maintenance.
As the network structure becomes flatter and more distributed, and application scenarios and multimedia services become more abundant, the SON of wireless communication networks will become more and more important. Faced with the deployment and operation of next-generation broadband mobile communication networks, in order to reduce operating costs and maintenance costs, operators must establish and operate a network on the one hand; on the other hand, they need to simplify the user's use process. Therefore, the trend of next-generation mobile networks must be "self-configuration", "self-optimization", and "self-healing", and the influence of human factors on the network is getting smaller and smaller. SON technology just meets the needs of the future market and technology, so it has very good market prospects and application prospects.
Combined with China's national conditions, based on the TD-SCDMA technology evolution, the adoption of TD-LTE + technology solutions in 4G is in line with China's long-term development plan, and is conducive to China's mastery of independent intellectual property rights at the core of 4G systems. As a key technology at the 4G network level, SON will determine the pros and cons of the TD-LTE + system network performance, and will also affect the TD-LTE + network construction and operation and maintenance costs, as well as business and application development. SON technology can promote the development and evolution of traditional network planning, optimization and management technologies.
It is foreseeable that in some emergency communication demand scenarios, or in situations where some natural disasters cause the communication equipment to partially work, the network using SON technology will be able to quickly meet or restore the communication needs, improving the robustness of the wireless network itself
TD-LTE SON technology research
LTE uses its high bandwidth to provide users with richer multimedia services, but LTE operators are most concerned about hoping to achieve higher profits through effective operation and maintenance costs. The self-organizing network technology (SON, Self-organized Network) proposed by 3GPP R8 and R9 for LTE can significantly reduce operation and maintenance costs and further enhance the competitive advantage of LTE. TD-LTE has been selected as a 4G candidate standard, but China's SON research, standardization work and equipment development of TDD-LTE system are still relatively behind FDD-LTE and WiMAX systems. SON development and standardization work on TD-LTE + system It is blank.
At present, SOCRATES project, 3GPP organization, NGMN organization, IEEE802.16m respectively carry out research and discussion on SON.
The impact and demand of SON on the telecommunications management network are mainly studied in the technical specification group SA of 3GPP. SA mainly discusses how to transform and upgrade the existing network management system and interface to achieve the performance detection and policy control of SON. Currently it is mainly undertaken by SA5. SA5's research work on LTE SON has also started since 2008. The standardization work of 3GPP R8 and R9 has been completed. The SON research of R10 is in progress. The standardization and research work of SON for 4G is also just beginning. Basic needs, ANR management, SON self-optimized operation and maintenance.