Technology continues to develop very quickly down to the corner of the world, but not with strong will and hard work, information technology, chaired by the computer becomes a linear phenomenon with the development progress of the age. The development of information technology is developing very rapidly, this development can not be separated from the ability of computers to perform data communication and also establish a computer network both local network or Internet network.
In development, the computer does not stand alone to form it all, computer connectivity technology requires that a computer and a faithful partner accomplice computers within an organization’s information technology because information technology runs linearly with the times that the human Demand for always mobile (moving), then the connectivity technology that should be most developed is the technology that is wireless connectivity (wireless)
A term describing a computer network where there is no physical connection (either copper cable or fibre optics) between sender and receiver, but instead they are connected by radio.Applications for wireless networks include multi-party teleconferencing, distributed work sessions, personal digital assistants, and electronic newspapers. They include the transmission of voice, video, images, and data, each traffic type with possibly differing bandwidth and quality-of-service requirements. The wireless network components of a complete source-destination path requires consideration of mobility, hand-off, and varying transmission and bandwidth conditions. The wired/wireless network combination provides a severe bandwidth mismatch, as well as vastly different error conditions. The processing capability of fixed vs. mobile terminals may be expected to differ significantly. This then leads to such issues to be addressed in this environment as admission control, capacity assignment and hand-off control in the wireless domain, flow and error control over the complete end-to-end path, dynamic bandwidth control to accommodate bandwidth mismatch and/or varying processing capability. GENERATIONS OF WIRELESS TECHNOLOGIES
A cellular network is a radio network distributed over land areas called cells, each served by at least one fixed-location transceiver known as a cell site or base station. Cell is short for Cellular. Cell phones companies distribute an area or a city in several grids called cells.The phone will be receiving or transmitting through the towers located in that local grid. As you keep moving from "cell" to "cell" the respective towers pick up signals from your phone. This is also the reason to locate a person using a cell phone There are various main generations of cellular from 1st generation to 5th generation .In the present time, there are four generations in the mobile industry. These are respectively 1G the first generation, 2G the second generation, 3G the third generation, and then the 4G the fourth generation and an upcoming 5G. The nomenclature of the generations generally refers to a change in the fundamental nature of the service, non-backwards compatible transmission technology and new frequency bands. This article details the differences between the major cell phone technologies This G, 2G, 3G, 4G, and 5G defined by an International Telecommunication Union (ITU) standard.
1G - The first generation
1G refers to the first-generation of wireless telephone technology, mobile telecommunications. It was using analog telecommunications standards that were introduced in the 1980s. It has the ability to transfer calls from one site to the next as the user travelled between cells during a conversation, as 1G was based on Frequency Division Multiple Access (FDMA) for transfer between cells. It was very vague and had a low capacity. These services are provided with circuit...
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