วันอังคารที่ 18 มกราคม พ.ศ. 2554

Evolution of data communications 2G to 3G

GPRS

GPRS (General Packet Radio Service)
After we heard about a wireless data communications and mobile systems to each other and then. Next we come to understand the technology. Data communication since the 2G to 3G, because of the Data Communications will begin during the 2G, in the Generations of the telephone system Digital, age at the beginning of the phone SIM Card.
          First generation 2G phones can receive – send Data such as Nokia 2110S model is used to connect to Computer Notebook PCMCIA or through devices. Some people called the Data Card.
For first Generation data communications. It can be used both, play Internet, send and receive E-mail or even FAX transmission can be done as well. But it has limitations. Several reasons such as
         
1. Expenses will be charged according to usage area by using a Time Base Rate 3,8,12 Baht in Thailand like to call early. The very high call charges.
         
2. The speed of transmission is estimated at 9.6 Kbps (kilobits per second), the speed is very low when compared with the use of Internet by our house we refer to the transmission of this information that the technology CSD (Circuit Switching Data).

The next frame in the dash. It is a change in a big way. About receiving - Data sent it today. We refer to as a 2.5G era is the era that has changed as follows.
1. Expenses will be changed to thinking Volume Base by the nature of the data packet to send is charged only the amount of Data transmission only.

2. Always On connection of the device is connected to the Network at any time, but transmits data only when the actual work.
3. Speed transmission will raise about 4 times the speed of transmission up to 40 Kbps, depending on the time and area of use. We refer to this technology as GPRS (General Packet Radio Service).
If we want to use GPRS to transmit data. We must have the following elements.
1. Phones have support for GPRS Class in the more highly mobile. I will get - the faster data transfer (Verified by Class Spec. Of each phone model).

2. SIM Card customers need to open the GPRS service providers.
3. We must work in areas where the network service GPRS.
So, GPRS is a new way. That enables customers to turn increasingly to use Data on mobile phones. This in itself, and the phone started to use WAP functions so that customers can use Internet from their mobile screen without connecting to the Computer Laptop.

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