Wireless Network Technology

Wireless network is a type of telecommunication network, in which links between nodes are implemented without the use of wires. It employs radio signal frequencies or electromagnetic radio waves for carriers to transmit and receive signals among the nodes. It takes place at the physical layer of the network. This is getting popular nowadays due to less use of hardware and easy setup feature.
There are different types of wireless networks, which are described below.
Wireless PAN (Wi-Fi PAN)
Wireless Personal Area Networks interlink nodes within a small area, generally within a reach of a person. Bluetooth and infrared rays are two examples of this type of wireless networks. These networks can interconnect a headset to a laptop. These networks are also used in many consumer electronic devices. Wi-Fi PANs are made simpler and easier to set up and configure by the Intel My Wi-Fi and Windows 7 virtual Wi-Fi technologies.
Wireless LAN (Wi-Fi LAN)
Wireless Local Area Networks connect two or more nodes using a wireless distribution technology and providing a link to the wider internet. Spread spectrum and OFDM radios are two examples of Wi-Fi LAN. The user of this type of network can move within a restricted area and can access the nodes connected to the network. The specification of this network is provided in the IEEE standard 802.11.
Wireless MAN (Wi-Fi MAN)
Wireless Metropolitan Area Networks connect several Wi-Fi LANs. As the name indicates it covers a wider area of a size of a metropolitan. The specification of this network is provided in the IEEE standard 802.16d/802.16e.
Wireless WAN (Wi-Fi WAN)
Wireless Wide Area Networks cover big outdoor areas. These networks could be used as public internet access system or as a connection between different locations. 2.4 GHz band is used by these networks. A typical Wi-Fi WAN comprises base station gateways, access points and wireless bridging relays. Other Wi-Fi WANs are mesh systems in which access point’s act as relays also. These networks could be stand alone system also if powered by renewable energy systems like photo voltaic cells or wind energy systems. If any problems arises while using Wi-Fi WAN, network support is available from various Wi-Fi WAN service providers.
Mobile phone networks
Mobile phone network is a radio network spread over land areas called cells, each supported by a transceiver known as a base station. These stations can cover a large area provided they are interconnected. A large number of portable devices like mobile phone and pagers can communicate with each other as well as with landline telephones connected to the network. There are certain advantages of cellular networks compared to wired telephone networks which include increased capacity, minimized power use, bigger coverage area, less interference from other radio signals. Two most popular cellular technologies are GDM and CDMA. GSM or Global System for Mobile communications is a mobile network in which mobile phones get connected to network by searching for it in the immediate locality. CDMA or Code Division Multiple Access employs spread spectrum technology and a special coding scheme to allow multiple users to be multiplexed over the same physical channel. Many times mobile phone networks face difficulties, for which tech support is provided by various mobile service providers.