Sunday, June 7, 2009

In 1982, the history of GSM started and CDMA was first used in 1995

Conference with the postal and telegraph in Europe in 1982 and since that time in the history of GSM started. This conference established a study group called Groupe Special Mobile (GSM) to study and develop a public communication system in Europe. In 1989, this task is left to the European Telecommunication Standards Institute (ETSI) and the GSM Phase I was launched in mid 1991.
And then in 1993, already have 36 GSM networks in 22 countries. Unique compared to first generation GSM service is SMS. SMS or Short Message Service is a two-way service to send short messages of 160 characters. GSM is used at this time have entered phase 2.
CDMA originally emerged from military technology, the United States and is devoted to the IS-95 standard. Several patents on networks that are now based on CDMA technology owned by Qualcomm Inc., So that the equipment manufacturer to pay royalties.
CDMA technology to create a capacity of cells to be greater than the GSM system, because in the CDMA system, each call has a code of communication-specific code to enable more customers to use the same radio resources without the occurrence of interference and cross talk interference. Radio source in this case is the frequency and time slot that is provided for each cell.
System-based CDMA wireless communication was first used in 1995 and until now, CDMA is the main rival of the GSM system in many countries. In 1999, the International Telecommunication Union (ITU) chose CDMA as a technology standard for third generation (3G). CDMA variants that are widely used WCDMA and TD-SCDMA.
In May 2001 there were already 35 million CDMA subscribers worldwide. And in 2003, there were 100 million subscribers using CDMA in the world. Main merit of the third generation is the ability to transfer data that fast or have a high bit rate.
The high bit rate of the cause many CDMA operators can provide various multimedia applications that better and more varied, and a charm for the customers. Just imagine, with only a mobile phone, we have a camera facility, video, computer, stereo and radio. In addition, a variety of entertainment can also enjoy such as video clips, the traffic in real-time, teleconference, simply book a place even in restaurants, simply by pressing the button on the handphone.
When in any house, we can do many things without having to exit the room, such as
check bank balance, pay course fees for the children, ordering food and others. That is not all that impossible for the third generation.
In the long term, CDMA and other technologies such as GSM will than based on the total cost per customer's network infrastructure and aircraft price phone or device.

3 comments: "In 1982, the history of GSM started and CDMA was first used in 1995"

GeOL said...

nice post

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