What is a 3G network system integration engineer?

Definition of 3G 3G is the abbreviation of 3rd-generation mobile communication technology, which refers to the cellular mobile communication technology supporting high-speed data transmission. 3G service can transmit voice (call) and data information (e-mail, instant message, etc.) simultaneously. ). The typical feature is to provide high-speed data services. Introduction of 3G background knowledge Compared with the first generation analog mobile phone (1G) and the second generation digital mobile phone (2G) such as GSM and CDMA, the third generation mobile phone (3G) generally refers to a new generation mobile communication system that combines wireless communication with multimedia communication such as the Internet. The main difference between 3G and 2G is the speed of voice and data transmission. It can better realize global wireless roaming, handle images, music, video streams and other media forms, and provide various information services including web browsing, teleconference, e-commerce and so on. At the same time, we should also consider the good compatibility with the existing second-generation system. In order to provide this service, the wireless network must be able to support different data transmission speeds, that is, at least 2Mbps (megabits per second), 384kbps (kilobits per second) and 144kbps in indoor, outdoor and driving environments, respectively (this value will change according to the network environment). 3G is the third generation communication network. At present, domestic networks other than GSM and CDMA are not supported. GSM devices use time division multiple access, while CDMA uses code division spread spectrum technology. Advanced power and voice activation can provide at least three times the capacity of GSM network. The industry regards CDMA technology as the mainstream technology of 3G, and ITU has determined three wireless interface standards: CDMA2000, WCDMA and TD-SCDMA, which means that domestic CDMA can smoothly transition to 3G network. The main features of 3G are. The first generation analog mobile phone (1995) can only make voice calls; From 1996 to 1997, the second-generation GSM, CDMA and other digital mobile phones (2G) have added the function of receiving data, such as receiving emails or web pages; In fact, 3G was not born in 2009. As early as 2007, 3G was produced abroad, and China also successfully developed China 3G in 2008. The theoretical peak downlink speed can reach 3.6Mbit/s (2.8Mbit/s), and the peak uplink speed can also reach 384 KBit/s, which can't be 2G per second as said on the Internet. Of course, the next movie can't be completed instantly. Note: G3 does not stand for 3G, but is the abbreviation of "Guide3". Guidance has two meanings: verbs represent guidance, influence and domination, and nouns represent guidance and guidance. Taken together, the general idea is to lead two other friends into the 3G era. "3" stands for the integration of mobile+broadband+fixed network+mobile TV+... in the 3G era. A bolder guess is that China Mobile will go beyond the existing 3G concept, provide network support, terminals and services suitable for the above-mentioned converged services in the TD-LTE era, and lead people into real 3G life. So G3 is a very complicated concept. Unless China Mobile reneges on its mobile phone brand, there will be only one strategic brand, covering brand businesses such as GSM, Shenzhouxing and M-Zone. 3G training and enterprise demand The development of 3G licensing mobile Internet is gradually favored by the industry, and the demand for talents is extremely urgent. In the research and development of mobile application software, the talent gap is as high as 1 10,000. Embedded development talents urgently needed by handheld device manufacturers, mobile commerce solution talents in short supply by software developers, and value-added service development talents needed by a large number of content developers and providers in the 3G era are basically in short supply, and even companies dig for R&D talents from each other. It is reported that employees with more than two years of experience in mobile phone software research and development have a monthly salary of more than 10,000 yuan. With the large-scale laying and operation of 3G networks and the popularization of 3G mobile phones, the demand for talents will increase exponentially in the future. 3G software talents have become dazzling stars in the talent market, and 3G software development engineers have become the first choice for graduates! According to the statistics of authoritative organizations, there were 10 hot jobs in 2009, including: 1. Gold content of 3G mobile phone software development engineers: annual salary of 3G talents100000, and the national talent gap in 2009 was about100000. Second, the gold content of network marketing planners: the monthly salary is more than 10,000 yuan, and the national talent gap is about 500,000. On the one hand, enterprises are in urgent need of talents, on the other hand, a large number of students can't find jobs. In addition to poaching others, another way for enterprises is to cultivate talents by themselves, but it takes a certain period to cultivate talents, and the success of training is also a great risk. In this market situation, 3G training has brought warmth to enterprises and students, and training institutions for 3G mobile phone R&D talents have also begun to appear. According to the survey, if an ordinary undergraduate has mastered 3G mobile phone software research and development skills, his salary will be about twice as high as that of ordinary undergraduate/junior college students when they are employed, which is about 3,000-6,000 yuan, and the salary after one year of work experience is about 8,000-110,000 yuan. Ordinary undergraduate/junior college graduates or graduate students with a certain 3G mobile phone software research and development foundation rather than skilled technology will also be the key absorption and training targets of mobile SP related companies. According to relevant analysis, the three major operators in China are definitely the first to compete for 3G talents, and for college graduates facing employment difficulties, participating in 3G training will definitely improve their competitiveness in the job market. What is a 3G network engineer? 3G engineers are engineers engaged in 3G communication technology industry. Now it mainly refers to professionals in 3G hardware network. At present, 3G in China uses two kinds of networks in China: GSM equipment uses time division multiple access, and CDMA uses code division spread spectrum technology. Advanced power and voice activation can provide at least three times the capacity of GSM network. The industry regards CDMA technology as the mainstream technology of 3G, and ITU has determined three wireless interface standards: CDMA2000, WCDMA and TD-SCDMA, which means that domestic CDMA can smoothly transition to 3G network. The main feature of 3G is that it can provide mobile broadband multimedia services, including 144kbit/s in high-speed mobile environment, 384kbit/s in walking and slow mobile environment, and 2 mbit in indoor environment. In September 2006, the Ministry of Information Industry began to carry out 3G professional qualification certification and training in the national communications industry. What qualities do 3G network engineers need? 3G network engineer includes two technical contents. 1. Hardware facilities: 3G engineers must have bachelor degree or above in communication and electronics, be familiar with mobile communication principles and microwave communication technology, be proficient in C or C++ programming, have rich experience in digital circuit design or hardware development, or have experience in developing mobile phone software and hardware such as CDMA, GSM or TD-SCDMA, WCDMA, etc. The second is the research and development of end products. Judging from the 3G industry's thirst for talent quality, related industries have started a talent war. In the future 3G industry, whoever can master the most advanced development technology will be the first to shake the market. At present, colleges and universities train college students, and the development technology is outdated, and some learning knowledge is outdated, which is difficult to meet the development needs of employers. In fact, service companies related to the 3G industry are more inclined to recruit employees from the communication industry. This is the mentality of many people. However, there is a phenomenon in many employers, that is, professional counterparts, lack of skills, can not be competent for related work. Now many students are eager to enter such a fast-growing industry. Experts from Lecheng Institute of Digital Communication suggest that students should further process what they have learned through training according to their own conditions and should not blindly follow. Only with detailed career planning, college students can still find their place in the fiercely competitive 3G workplace. 3G course introduction: J2ME platform for 3G embedded mobile phone software development, Symbian platform for 3G embedded mobile phone software development, WindowsMobile platform for 3G embedded mobile phone software development, IPhone platform for 3G embedded mobile phone software development and MTK platform for 3G embedded mobile phone software development. Developing Internet application and terminal application technology will contribute to the development of 3G mobile Internet. Symbian course requirements: master Symbian SDK and its development environment, three types of Symbian binary code, the use of packaging and publishing tools, basic types, descriptors and dynamic arrays, Symbian exception handling and cleaning mechanism, text display and font use, UI components, file use, Course Objectives of Application Engineer for Streaming and Storing JAVA ME Platform This course is dedicated to cultivating advanced talents based on JAVA ME platform development, deeply mastering technologies such as JAVA, JAVA ME and JAVA WEB, and engaging in mobile game development and mobile embedded software development based on JAVA ME platform. The main employment companies are companies engaged in mobile game development, such as Shanda Digital Red and Datouwang. The company types are mobile game development companies or mobile client software development companies that master Java language overview, classes, object and class inheritance, abstract classes and interfaces, array and collection development, file access and Swing UI design. The realization of map editor MIDP 1.0 development process, UI design package, RMS data warehouse, MIDP2.0 development, game animation creation, and the basic process of developing games. The realization and optimization of game map, background scrolling technology, the in-depth use of cropping area, the realization of character animation, the collision detection technology between characters and scenes, and the reading of map files. Write an example of ACT game, realize the map, characters and props in the game, realize the switch of levels and realize the collision detection in the game. Java programming of large database, JDBC accessing Oracle database and Hibernate accessing database. Java multithreading technology, Java network programming, NIO programming, Java Web development technology. The development of MMORPG game has realized a large-scale multiplayer online mobile phone network RPG game. From planning to implementation, it was finally transplanted to 30 commonly used models for adaptation, and an OTA platform was built to release games. Wap Mobile Internet Engineer Course Objectives This course is dedicated to cultivating mobile value-added development talents, including SMS, MMS, IVR development engineers, WAP website development engineers, mobile service software development engineers, etc. The main employment enterprises are SP companies such as Kong Zhong, Maopu and TOM, and mobile commerce software development companies. Their company types include service provider SP company, mobile commerce development company, WAP CP company and equipment supplier company. The main work includes: mobile WAP website development, MMS development, voice value-added service IVR development, Java EE mobile commerce website development, Java EE enterprise application system development, etc. Overview of wireless website, introduction of wireless website development technology and development process, WML markup language, WML creating static WAP website. JSP basic syntax, built-in objects, common actions, Servlet development technology, MVC design pattern. In order to realize the function of online community based on Web, users can register, log in to the community, make friends, chat, view news and participate in interactive games. Oracle database deployment, PL/SQL syntax, common PL/SQL commands, stored procedures, cursors, triggers. Struts MVC framework development, IOC and AOP programming of Spring, Java ORM programming of Hibernate. SSH integrated development. Realize a large-scale community integrating Web and WAP, so that users of mobile phones and the Internet can exchange and publish information on this platform.