3G introductory textbook Lesson 1, Explanation of wireless technology related terms GSM/2G GSM (Global System For Mobile Communication) is a standard uniformly launched by the European Standardization Committee in 1992. It uses digital communication technology and unified network standards to ensure communication quality and develop more new services for users. The transmission speed of the GSM mobile communication network is 9.6K/s. At present, there are more than 500 million GSM mobile users in the world, covering 1/12 of the population, and the proportion of GSM technology in the world\'s digital mobile phone field has exceeded 70%. Since GSM is the second generation of mobile communication technology relative to analog mobile communication technology, it is referred to as 2G. At present, my country has more than 80 million GSM users, becoming the world\'s largest operating network. GPRS (General Packet Radio Service) is a wireless packet switching technology based on the GSM system, providing end-to-end, wide-area wireless IP connection. Simply put, GPRS is a high-speed data processing technology, and its method is to transmit data in the form of \"packets\". Network capacity is allocated only when needed and released when not needed. This transmission method is called statistical multiplexing. At present, the transmission speed of GPRS mobile communication network can reach 115k/s. GPRS is a technology developed on the basis of GSM. It is a technology between the second-generation digital communication and the third-generation packet-based mobile service, so it is usually called 2.5G. WAP (Wireless Application Protocol) is the first stage product of the combination of mobile communication and the Internet. This technology allows users to surf the Internet with wireless devices such as mobile phones and browse between various websites through a small screen. These websites must also be written in WML (Wireless Markup Language), which is equivalent to HTML (Hypertext Markup Language) on the Internet. To make an analogy, GPRS and GSM are roads, and WAP is a car on the road. After China Mobile opened GPRS, WAP drove on the two roads of GSM and GPRS, and driving on the GPRS road can increase the data transmission speed. Therefore, the content on the existing WAP...
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