What does the core network do? What exactly does it do?

Simply put, mobile network can be divided into three parts: base station subsystem, network subsystem, security management and other system support parts. The core network is located in the network subsystem, and its main function is to connect the call request or data request from port A to different networks. It mainly involves call connection, billing, mobility management, supplementary service implementation, intelligent triggering and so on. The main body is supported by the switch. For softswitch, there are two obvious concepts, the separation of control and bearer, and the separation of control channel and data channel. According to the protocol, the core network is a network element with the function of switching to the core or calling routing, which is generally the case with the 2G/3G core network. In R4 architecture, such as MSC servers in MGW, HLR, VLR, EIR, AUC and other places. Its main function is the whole call signaling control and bearer establishment. 1. Beijing Yitong Huarui Technology Co., Ltd. is a high-tech enterprise specializing in the construction and optimization of wireless network engineering in communication field, especially in mobile communication field, involving all fields of communication service industry. Long-term commitment to mobile communication network engineering construction and network maintenance optimization, aiming at providing high-tech content, high added value and high satisfaction network services for mobile communication operators, equipment vendors and service providers. Founded in June 5438 +2006 10, the company is a holding subsidiary of Guangzhou Yitong Century Technology Co., Ltd. (www.etonetech.com). The company's business covers equipment debugging, system integration, network planning, network optimization, system testing, network maintenance, equipment installation, communication equipment and many other aspects. The service footprint covers all parts of China and Southeast Asia, and it has extensive business cooperation with many domestic operators, and has close technical cooperation with many domestic and foreign equipment vendors and operators such as Ericsson, Huawei, China Mobile and China Unicom. The company's products and solutions cover mobile (HSDPA/WCDMA/EDGE/GPRS/GSM, CDMA 20001XEV-DO/CDMA 20001X, TD-SCDMA and WiMAX), core network (IMS, mobile soft switching, NGN) and telecom value-added services (IN, mobile data service, WiMAX). The company's marketing and service network covers many provinces in China, Hong Kong, Macao and Taiwan, and has more than 200 professional and technical personnel, of whom more than 95% are engaged in technical work. The technical backbone is the backbone of China Telecom's Guangdong communication network technical support. It has accumulated rich communication network knowledge and experience and formed a unique "engineer culture" in the industry, which can provide customers with efficient and high-quality services. In the process of continuous growth, Beijing Yitong Huarui Technology Co., Ltd. has carried out a series of management changes and gradually integrated with the international community. We have made profound changes in product development, supply chain management, technical services, marketing, human resource management, financial management and quality control, introduced industry best practices, and established an IT-based management system. The company pays attention to the construction of corporate culture and the cultivation and development of talent echelon, and has established a scientific talent management system. The company takes "a century-long plan, talent-oriented" as its human resources concept, recruits all kinds of outstanding talents needed by enterprises, and tries its best to create a harmonious, inspiring and passionate working environment and living environment for them. The company pursues the growth of enterprises and employees, and is committed to the perfect combination of personal achievements and enterprise progress. We believe that outstanding talents will find their own position in Beijing Yitong Huarui Technology Co., Ltd. and experience the infinite achievements of career development. Beijing Yitong Huarui Technology Co., Ltd. is a dynamic team. We look forward to providing you with a big stage to fully display your talents and realize your self-worth. Welcome to join us! Second, the company's corporate culture Beijing Yitong Huarui Technology Co., Ltd. is eager to become a world-famous enterprise and strive for it. Vision: short-term strategic goal of becoming a global excellent information technology service and product provider (3 years): medium-term strategic goal of becoming a domestic well-known mobile communication technology service and product provider (8 years): long-term strategic goal of becoming a domestic first-class information technology service and product provider (15 years): becoming an international well-known information technology service and product provider Mission: contributing to society, Make outstanding contributions to the human information industry for customers: strive for perfection, provide customers with high-quality products and services for employees: people-oriented, provide employees with stage core values for realizing personal values: sincere wisdom, pragmatic innovation motto: quiet and far-reaching work attitude: honest and down-to-earth life attitude: enjoy work and enjoy life III. Employee career development planning Beijing Yitong Huarui Technology Co., Ltd. respects the people-oriented principle and regards people as the company's first capital. To this end, we are committed to the career development of our employees. We provide: clear career planning, comprehensive technical knowledge training system, quality improvement, education, fair performance management evaluation, broad promotion and development opportunities. Four. Company salary and welfare Beijing Yitong Huarui Technology Co., Ltd. provides competitive benefits in the same industry in order to attract and retain the best talents. At the same time, we have a scientific and fair mechanism within the company to reward outstanding employees accordingly. To this end, we provide: comprehensive social insurance (pension, unemployment, work injury, maternity, medical care) and housing provident fund, personalized commercial insurance, comprehensive subsidies (such as communication subsidies, business travel subsidies, holiday subsidies, etc.). ), paid annual leave, hierarchical physical examination, and colorful activities. The positions recruited by the company are: Beijing, Jinan, Nanjing, Chongqing, Xi and some overseas countries or regions. You can learn more about Guangzhou Yitong Century Technology Co., Ltd. (www.etonetech.com). After all, that's his boss.