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The so-called wireless network refers to a network that can interconnect various communication devices without wiring. Wireless network technology covers a wide range of areas, including global voice and data networks that allow users to establish wireless connections over long distances, as well as infrared and radio frequency technologies that are optimized for short-range wireless connections. Wireless networks are commonly integrated with telecommunications networks and do not require cables to link nodes to each other. Wireless networks are generally used in remote control information transmission systems that use electromagnetic waves, such as networks that use radio waves as carriers and physical layers, such as LTE, Wi-Fi, CDMA2000, etc. According to different network coverage, wireless networks can be divided into wireless wide area networks (WWAN: Wireless Wide Area Network), wireless LAN (WLAN: Wireless Local Area Network), wireless metropolitan area networks (WMAN: Wireless Metropolitan Area Network) and wireless personal LAN (WPAN: Wireless Personal Area Network). Wireless wide area network is based on mobile communication infrastructure and is operated by network operators, which are responsible for communication services in all areas of a city or even all areas of a country. Wireless LAN is a network responsible for wireless communication access functions within short distances. Its network connection capabilities are very powerful. At present, wireless LAN is based on the IEEE802.11 technical standard of the IEEE academic organization, which is the so-called WIFI network. Wireless WAN and wireless LAN are not completely independent of each other. They can be combined to provide more powerful wireless network services. Wireless LAN can allow access users to share information within the local area, and wireless WAN can allow access users to share information within the local area. Share information outside the local area. Wireless metropolitan area network is a wireless network that allows access users to access fixed places. It connects multiple fixed places in a city or region. Wireless personal area network is a wireless network in which users personally connect their portable devices through short-distance wireless connections through communication devices. Whatapp:+8618261789019
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