Wireless/Mobile
Communication
Wireless
communications is a type of data communication that is performed and delivered
wirelessly. This is a broad term that incorporates all procedures and forms of
connecting and communicating between two or more devices using a wireless
signal through wireless communication technologies and devices.
The
Global System for Mobile Communications (GSM) is a second generation (2G)
standard for mobile networks.
In
the early 1980s, a group was formed by the European Telecommunications
Standards Institute (ETSI) to develop a digital mobile communication system.
Aptly named Groupe Speciale Mobile (GSM), its main task was to develop a
single, consistent network for all of Europe and come up with a better and more
efficient technical solution for wireless communication.
CDMA
(Code-Division Multiple Access) refers to a protocol used in second-generation
(2G) and third-generation (3G) wireless communications. Code Division Multiple
Access (CDMA) is a sort of multiplexing that facilitates various signals to
occupy a single transmission channel. It optimizes the use of available
bandwidth. The technology is commonly used in ultra-high-frequency (UHF)
cellular telephone systems, bands ranging between the 800-MHz and 1.9-GHz.
General
Packet Radio Service (GPRS) is a packet-switching communications protocol for
cellular networks. Mobile phones that have the GPRS technology can be used to
receive data and information, such as web pages and email. GPRS is an
"always on" technology which means that the mobile phone is always
ready to receive data.
• Short Message Service (SMS) – It is a special-purpose
communication protocols designed for text messaging
•
Multimedia Messaging Service (MMS) – It is an extensions to SMS to enable
transmission of videos in addition to text
•
Wireless Application Protocol (WAP)– It is a specialized communication protocol
for mobile browsers.
WLL
is a system that connects subscribers to the local telephone station
wirelessly. Wireless local loop is used for wireless communication links which
deliver plain old telephone services or broadband services to customers. This
is an ideal application which provides telephone services remotely and is
mostly used in developing countries where cable infrastructure is either
expensive or speed is not fast. This wireless link can be a part of the
connection between the subscribers and switch.
This
system is based on radio networks which provide services like telephone in
remote areas. Different types of wireless local loop include Broadband Wireless
Access, Radio in the Loop, Fixed Radio Access and Fixed Wireless Access.
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