A little more than two decades since the introduction of the first mobile phones, but mobile phones have undergone significant changes. Systems of the first generation, based on the analog principle, be used exclusively for telephone communication and only later acquired some basic services.
Systems of the second generation, including standard GSM, provide improved transmission quality and signal protection, additional services, low-speed data, and systems for GSM - automatic service m. N. roaming subscriber for ease of movement in different countries and continents.
Shortly after the appearance of the second-generation mobile systems, preparations were made to the design standards of next generation mobile communication. Development were carried out both at the regional level (ETSI, project RAINBOW from ACTS, US Joint Technical Committee, the Japanese ARIB) and global - ITU (International Telecommunications Union), a consequence of the activities of which was the creation in 1985 of the initiative group, which in 1996 was renamed the IMT - 2000. various projects have proposed various ways of transition to the third generation. Each project is mainly considered two options: a gradual transition from the existing systems and "abrupt" jump.
Third generation (3G) provides high-quality voice, image (speed is expected to reach up to 2 Mbit / s instead of 9.6 kbit / s available today), multimedia content, and access to the Internet, as well as the exchange of data between a mobile phone and a computer. At the same time, 3G technology should improve the quality of service second generation networks, adding them to a host of new services.
Prediction, based on an analysis of companies shows that by the year 2005 60% of the European population will be using mobile phones, and a third will be in multimedia systems of the new generation. According to experts in UMTS, the rapid development of communication in this direction will require additional resources for 2005 - 2010 years. Some also expressed the assumption that the development of new ranges: 2.5 GHz or even 10GHz, as a prerequisite for any further advances in technology.
Systems of the second generation, including standard GSM, provide improved transmission quality and signal protection, additional services, low-speed data, and systems for GSM - automatic service m. N. roaming subscriber for ease of movement in different countries and continents.
Shortly after the appearance of the second-generation mobile systems, preparations were made to the design standards of next generation mobile communication. Development were carried out both at the regional level (ETSI, project RAINBOW from ACTS, US Joint Technical Committee, the Japanese ARIB) and global - ITU (International Telecommunications Union), a consequence of the activities of which was the creation in 1985 of the initiative group, which in 1996 was renamed the IMT - 2000. various projects have proposed various ways of transition to the third generation. Each project is mainly considered two options: a gradual transition from the existing systems and "abrupt" jump.
Third generation (3G) provides high-quality voice, image (speed is expected to reach up to 2 Mbit / s instead of 9.6 kbit / s available today), multimedia content, and access to the Internet, as well as the exchange of data between a mobile phone and a computer. At the same time, 3G technology should improve the quality of service second generation networks, adding them to a host of new services.
Prediction, based on an analysis of companies shows that by the year 2005 60% of the European population will be using mobile phones, and a third will be in multimedia systems of the new generation. According to experts in UMTS, the rapid development of communication in this direction will require additional resources for 2005 - 2010 years. Some also expressed the assumption that the development of new ranges: 2.5 GHz or even 10GHz, as a prerequisite for any further advances in technology.
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