2g vs 3g mobile phones
| Added: 31-01-2011 Author: Fredrick Joy Category: Mobile Phones |
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In 1910 Lars Magnus Ericsson's installed in his car when he was traveling in his car, he had to stop at places where phone lines and a pair of verses gained power, will connect the national telephone network. Perhaps, this is the birth of a phone, phone, although not specifically. An automated telephone system called the MTA was first developed by Ericsson and commercially released in Sweden in 1956. Weighing 40 kg, how much more famous, although fully automatic. Version of the update is called MTB was established 9 years later and weighed 9 pounds. It was closed in 1983 was approximately 600 clients.
In 1957, a radio engineer named Soviet Leonid Kupriyanovich create a portable phone and called LK-1. This phone is broken as only 3kg, a big improvement from the introduction. It is a small phone and Antenna Rotary dial. Can run up to 20-30 kilometers distance from the base station and has a 20 -30 hour battery. Each center can be used up to 6 clients. The next year he had updated his radio telephone to measure only 500 grams. This time it found that people should stay inside the cell area to call the old annoying. To overcome this problem Joel Amos E. Jr., a Bell Labs engineer, in 1970, to create automated call system, which handed the phone to be allowed to continue through the various regions of cells without disruption or loss of telephone conversations. The success of the first public commercial mobile phone network launched in 1971 in Finland. This was seen as cellular respiration 0G network as the area a little better than before network coverage.
In the year 1990 introduced 2G phone systems. This is indicated by the use of high speed digital circuit switched transmission and the telephone network and gnaling impossible. The two frequencies used by the 1G and 2G systems overlap. This written 1G penalty system and immediately closed. In the brick-sized mobile phones give way to 100-200g model of a small human hand, and it became a tradition until now. This is made possible through advanced batteries, efficient electronics and a higher density than the site of cellular respiration. Introducing a dialect popular 2G mobile phones and communications, SMS texting. This became the most popular example of the media and now has become a way for young people. First download media content is also introduced in the 2G phone. Ringtones are downloaded and paid for. Mobile ads are also introduced for use SMS to send short announcements and news.
Soon after he started for the development of 3G systems. This is done on demand (2 bit / s maximum data rate indoors, 384 k / bit / s out, for example), but not about the technology. Before the trial's first commercial 3G network was launched in Japan, with NTT DoCoMo in the Tokyo region in May 2001 and the first 3G networks commercially launched and also the same in Japan on October 1, 2001. At the end of 2007 approximately 300 million subscribers on 3G networks there. Revenue from the 3G network of more than $120 billion in 2007. The things that make this system a success rate of load transfer files and download from the Internet faster than 2G systems. Internet connects more than twice as fast on 3G systems. This has enabled a whole new experience like photos, videos, blogs, etc., can be accessed and enjoyed both. So, to make 3G services system and a large hit among mobile phone users, rather than 2G systems.
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