A little more than two decades since the first mobile phones, but mobile telephony has undergone substantial changes. Systems of first-generation, based on the analog principle, be used exclusively for telephone communication and only later acquired some basic services.
Systems of second-generation, including the standard GSM, provide better transmission quality and the protection of the signal, additional services, low-speed data transmission, and for systems of GSM - the so-called automatic service. roaming subscriber for the convenience of travel to different countries and continents.
Soon after the second-generation mobile systems, has begun preparations for the design of mobile communication standards next generation. Development took place at the regional level (ETSI, project RAINBOW by ACTS, US Joint Technical Committee, the Japanese ARIB) and the global - ITU (International Telecommunications Union), a consequence of which was the creation in 1985 the initiative group, which in 1996 was renamed the IMT - 2000. Different projects offer different ways of transition to third generation systems. Each project was largely seen two options: a gradual transition from the existing systems and "abrupt" jump.
Third-generation technology (3G) provides high quality voice, image (the rate is expected to reach 2 Mbps instead of 9.6 kbps are available today), multimedia content, and access to the Internet, as well as exchange data between mobile phones and computers. At the same time, the 3G technology to improve the quality of service networks, the second generation, 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 use cellular phones, and their third will use a new generation of multimedia systems. According to experts on 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 bands: 2.5 GHz or 10GHz, as a prerequisite for any further progress of technology.
In this section you will learn about updates to mobile communications and the development of mobile technology.
No comments:
Post a Comment