Wireless Networks
Wireless Networks
v Wireless is an old-fashioned term for a radio transceiver (a mixed receiver and transmitter device), referring to its use in wireless telegraphy early on, or for a radio receiver; now the term is used to describe modern wireless connections such as in cellular networks and wireless broadband Internet.
v Originally, radio technology was called ‘wireless telegraphy’, which was shortened to ‘wireless’.
v Network is connected by radio wave, microwave, infrared or satellite to maintain communications.
v Wireless requires specific equipment such as wireless NIC, Access Point, Router in place of wire.
Types of Wireless Network
v Wireless PAN(Personal area network )
Such networks interconnect devices in small premises usually within the reach of a person for example invisible infra red light and Bluetooth radio interconnects a headphone to a laptop by the virtue of WPAN. With the installation of Wi-Fi into customer electronic devices the Wi-Fi PANs are commonly encountered.
v Wireless LAN
The simplest wireless distribution method that is used for interlinking two or more devices providing a connection to wider internet through an access point. OFDM or spread-spectrum technologies give clients freedom to move within a local coverage area while remaining connected to the LAN. LAN’s data transfer speed is typically 10 Mbps for Ethernet and 1 Gbps for Gigabit Ethernet. Such networks could accommodate as many as hundred or even one thousand users.
The simplest wireless distribution method that is used for interlinking two or more devices providing a connection to wider internet through an access point. OFDM or spread-spectrum technologies give clients freedom to move within a local coverage area while remaining connected to the LAN. LAN’s data transfer speed is typically 10 Mbps for Ethernet and 1 Gbps for Gigabit Ethernet. Such networks could accommodate as many as hundred or even one thousand users.
v Wireless MAN
The wireless network that is used to connect at high speed multiple wireless LANs that are geographically close (situates anywhere in a few dozen kilometers). The network allows two or more nodes to communicate with each other as if they belong to the same LAN. The set up makes use of routers or switches for connecting with high-speed links such as fiber optic cables. WiMAX described as 802.16 standard by the IEEE is a type of WMAN.
The wireless network that is used to connect at high speed multiple wireless LANs that are geographically close (situates anywhere in a few dozen kilometers). The network allows two or more nodes to communicate with each other as if they belong to the same LAN. The set up makes use of routers or switches for connecting with high-speed links such as fiber optic cables. WiMAX described as 802.16 standard by the IEEE is a type of WMAN.
v Wireless WAN
WAN is the wireless network that usually covers large outdoor areas. The speed on such network depends on the cost of connection that increases with increasing distance. The technology could be used for interconnecting the branch offices of a business or public internet access system. Developed on 2.4GHz band these systems usually contain access points, base station gateways and wireless bridging relays. Their connectivity with renewable source of energy makes them stand alone systems. The most commonly available WAN is internet.
WAN is the wireless network that usually covers large outdoor areas. The speed on such network depends on the cost of connection that increases with increasing distance. The technology could be used for interconnecting the branch offices of a business or public internet access system. Developed on 2.4GHz band these systems usually contain access points, base station gateways and wireless bridging relays. Their connectivity with renewable source of energy makes them stand alone systems. The most commonly available WAN is internet.
v Mobile devices networks
The advent of smart phones have added a new dimension in telecommunications; today’s telephones are not meant to converse only but to carry data.
The advent of smart phones have added a new dimension in telecommunications; today’s telephones are not meant to converse only but to carry data.
Advantages:
Flexible if there is ad-hoc situation when additional workstation was required. Implementation cost is cheaper than wired network. Ideal for the non-reachable places such as across river or mountain or rural area. Ideal for temporary network setups. Disadvantages:
Lower speed compared to wired network. Less secure because hacker’s laptop can act as Access Point. If you connected to their laptop, they’ll read all your information . More complex to configure than wired network. Affected by surrounding. E.g: walls (blocking), microwave oven (interference), far distance (attenuation)