Cellular networks are those computer networks that use electromagnetic waves rather than wires to be able to carry signals more than the many elements of the network. Cellular networks which stepped on other wireless networks frequently make use of the lower layer systems to provide protection and encryption. Stand-alone cellular systems either provide their very own protection and encryption features or relies upon VPNs (Digital Private Networks) to supply those features. Oftentimes, multiple layers of protection and encryption could be desirable.
Need for Wireless Systems and their Benefits
Wireless networks participate in the fastest growing technical areas in telecommunications. The widespread adoption and reputation of wireless conversation systems is because its many advantages over wired systems.
The necessity for wireless networks arose from the merits of both mobility and cost benefits. Costs are reduced as the wiring installed is quite little, if it is needed. Enough time had a need to deploy such systems is significantly lesser than that of wired systems.
A radio solution is perfectly fitted to locations where cabling is prohibited, or wiring is tough to install, such as for example heritage structures or in areas close to rivers.
Types of Wireless Networks
Wireless networks are categorized in a variety of ways. Some wireless systems are fixed, and therefore antennas usually do not move often. Other wireless systems are mobile, and therefore the antenna can move continuously. The main types are categorized in the passages that stick to, predicated on their ranges and the technology utilized.
Wireless Personal Region Networks (Wireless PAN)
In a radio personal area network, devices are interconnected within a little area like a area. The Bluetooth protocol can be an exemplory case of a radio technology that’s found in short ranges, generally of some meters. For instance, Bluetooth can be used to wirelessly connect a headset to a PC or laptop.
The Infrared Data Association (IrDA) specifies protocol standards for data transfer using infrared rays in Wireless PANs.
Wireless GEOGRAPHIC AREA Network (Wireless LAN)
Wireless GEOGRAPHIC AREA Network is the cellular implementation of geographic area networks (LANs). Data is definitely transmitted between computers through the use of radio waves delivered across areas like huge homes, workplace areas or universities. The cellular LAN protocols are standardized beneath the IEEE 802.11 series.
Wi-Fi, a typical for “wi-fi fidelity” is trusted for networking computers and the web. The Wi-Fi technology brand, which is possessed by the Wi-Fi Alliance, can be used to certify items to establish interoperability between your products using IEEE 802.11 standards.
Cellular Metropolitan Area Network (Cellular MAN)
Cellular Metropolitan Area Networks connect many Cellular LANs together. The IEEE 802.16 Standard can be used for compliant implementations of Wifi MAN. WiMax, which means Worldwide Interoperability for Microwave Gain access to, can be an example of this implementation. The protection can are as long as a radius of over 30 kilometers around the WiMax tower.
MMDS (Multichannel Multipoint Distribution Services) is a broadband wifi Guy technology that uses point-to-multipoint transmitting using Ultra High Rate of recurrence (UHF). Its range can are as long as 70 miles.
LMDS (Community Multipoint Distribution Services) is another point-to-multipoint technology that uses microwaves and gets to a shorter selection of up to 5 kilometers from the bottom station.
The above three wifi networks, PAN, LAN and WAN operate on their own physical coating networks, utilizing anything from antennas included in handlheld products to large antennas mounted about towers. However, some cellular data networks stepped on wireless voice systems, such as for example mobile telephone systems. The main element types of mobile systems that are utilized for data exchange are outlined below:
CDPD (Cellular Digital packet Data). That is a specification that helps wireless connection to the web over cellular telephone systems.
HSCSD (High Rate Circuit Switched Data). That is a specification for data transfer over GSM systems.
GPRS (General Packet Radio Services).That is a radio service made to operate on the Global Systems for Mobile phone (GSM), which really is a global standard for cellular communication.
CDMA (Code Division Multiple Gain access to).This identifies the number of protocols of the 2G and 3G wireless communications. The CDMA-2000 1xRTT, a 3G cellular technology predicated on the CDMA system, is trusted in cellular and data conversation networks.
HSDPA (High Quickness Downlink Packet Access).That is a sophisticated 3G mobile communication protocol which allows Universal Mobile Telecommunications Program (UMTS) networks to facilitate high data transfer speeds.
EVDO (Evolution-Data Optimized).That is a telecommunications standard for using radio signals to transmit data for broadband Access to the internet. By using both Code Division Multiple Gain access to (CDMA) and Period Division Multiple Gain access to (TDMA) technology, it maximizes data exchange speeds.
EDGE (Enhanced Data prices for GSM Evolution).That is a worldwide radio-based mobile data transfer standard that facilitates high speeds as high as 384 Kbps in packet-switched mode.