History of Mobile Phone One of the greatest and successful inventions of the 20th century is the invention of the mobile phone. Mobile phone system was first commercialized in Japan in 1979. The conceptualization of ideas on mobile phone began in 1947 when W. Rae Young and Douglas H. Ring came up with the idea of hexagonal cells for mobile phones. The first mobile phone system was developed by Erickson in 1956 and it was known as Mobile Telephone system A (MTA). A portable mobile phone (radiophone) was created in 1957 by Leonid Kupriyanovich from Moscow.
USSR deployed mobile phone service in 1958 and its system was based on the Soviet MRT-1327 standard. A direct dial up service was first offered by a private telephone company in Kansas 1959, which used Motorola Radio Telephone equipment. The first semi automatic MTA was launched in Sweden in 1960 (Miller et al 60).An MTB system which used DTMF signals was introduced in 1965 by Erickson. Description of frequency reuse and handoff concepts, which formed the basis of present day cell phone, was done in 1970s.
The invention of call handoff system by Amos E. Joel, Jr (Guthery & Cronin, 69). In 1970 enabled mobile phones to be used continuously without loss of conversation when one moved from one cell area to another. A proposal for cellular service based on advanced mobile phone system (AMPS) was made in 1970 to Federal Communication Commission and was approved in 1982 (Hashimi et al 47). This analog AMPS was superseded in 1990 by Digital AMPS. ARP network in Finland was the first successful commercial networks.
It was launched in 1971. This is viewed as the zero generation cellular networks. The invention of Motorola DynaTAC 8000X in 1973 by Motorola is credited for being the origin of modern cell phone. This was the first mobile phone to be used in a setting, which was non-vehicle. Martin Cooper is credited for this invention (Laberge & Vujosevic 98). The important development of modern mobile phones is divided into generations. The first generation (1G) mobile phones are characterized with use of multiple cell sites and the ability to converse across different cell area without breakages in conversation.
This was made possible by the handover technology (Elrom et al 35). The first commercial 1G generation cellular network was launched in 1979 in Japan by NTT. The second 1G generation networks were simultaneously launched by Nordic Mobile Telephone (NMT) in 1981 in Denmark, Norway, Finland and Sweden. This was the first mobile phone network to feature international roaming. The second-generation (2G) networks emerged in 1990s and they used the GSM standard. These 2G generation mobile phones were based on digital transmission of information instead of the previous analog transmission.
They also used advanced and fast phone in networking signals. The development of 2G phones saw the introduction of prepaid mobile phones (Guthery & Cronin, 79). The first GSM network was launched in 1991 in Finland. The introduction of 2G networks coincided with development of tiny hand held devices. The 2G networks introduced new forms of communications such as short message service (SMS) which allowed text messaging. The introduction of SMS occurred in 1992 for machine generated SMS message and 1993 for person-to-person SMS text message.
The 2G networks also made it possible to access media content via the mobile phone. The first data services on mobile phones begun in Finland in 1993 (Elrom et al 34). The third generation 3G is characterized with high speed IP data networks. 3G networks uses packet switching instead of circuit switching used in 2G networks to transmit data. The first 3G network was launched in Japan in 2001 by NTT DoCoMo. Development of 2.5G systems such as GPRS and CDMA2000 1x occurred when 3G systems were being developed as extensions to the 2G networks.
The 3G networks enabled media streaming of radio and television to 3G handsets. High-speed downlink packet access (HSDPA) begun being implemented in mid 2000s.
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