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.

Cellular Generation 1G to 4G

During the 1G (First Generations) will be developed from a home phone (PSTN). However, the transferable we called the Mobile Telephone that can communicate wirelessly. A phone in Analog and a Single Band is not compatible with phones across Operators, or can not be used overseas, such as Cellular 900 or World phone800 in the past during the 1G will not use the SIM Card will be used program numbers into the phone. Therefore, the data transmission is Analog this information will not be sent any codec. Tuning can be made. Or illegally eavesdrop the conversation has made Security System security is very low.
1G-generation phones will only be used to make a call - and receive calls. FAX Analog transmission is not only able to send and receive SMS and Data

During the 2G (Second Generations) will develop a system from Analog to Digital Phone this period can be used both Voice and Data-quality voice conversation is sharper and is safe from the bug. Because Digital signals are converted before sending and receiving data encoded 0 and 1, and also to bring Roaming with other networks. Abroad in the GSM system with the use of Data will be able to send and receive data through the CSD in the early technology and developed a generation 2.5G GPRS and EDGE technology in our current era, so 2.75G. With these technologies. Make the station will have the functionality to play with Service WAP or Internet and so much more that was developed to run on the network.

Generation 3G (Third Generations) operation of the network under the same standard to all services available together with the Customize or modify applications. Have the appropriate user's Solutions are able to apply to each Operator in this era of service to a wide range of Multimedia services together. And can be used simultaneously, such as VDO Call, Internet, E-mail, VDO on Demand, Radio services, TV on Mobile, Chat, or Social Networking. In this generation 3G data transfer speeds are higher. The technology of the network and equipment used. There are currently developed as a 3.5G technology and HSPA. 3G standards have been developed continuously from the GSM standard, which will be developed in each Phase will have new features. Occur continuously.

Generation 4G (Forth Generations) is an age where all things. Everything will communicate all the same equipment under the Protocol, or IP Device will have a variety of self as computer equipment that can contact each other under the TCP / IP.
Age of High Speed is a very high speed. Transmits data quickly with Quality Media such as pictures and better sound, and it is the era of the Service are included together. Both of Telecommunications and Data Communications. Perfectly.

Data Communications

Before we will talk about the Data communications, we will get to know the technology of communication. Information together before. We can see that the image is the image of Figure 3 is Wired, Fixed Wireless and Mobile Wireless,

By the color green is a Wired. Wired is Data transmission via cable. Currently, it is still available, ie ADSL or High Speed Internet service at home by that the line has to be dragged into our house through the Modem and connect our computer to play with Internet service providers

Currently, most ADSL uses the copper wire in the connection. But it will have some service providers. Start the install Fiber Optic cables, which will result in data communication speed up to 10 times, which many in the future is expected to change as a Fiber Optic cables instead of copper in the present

Later, we mention that some of Fixed Wireless as shown yellow. This will send and receive data wirelessly through the air. It will be a first pairing together. Between Receiver with the transmitter, such as Bluetooth, Wi-Fi or Wi-MAX.

         Receiving or sending data in this manner. Have limitations in terms of the service area or the Coverage Area, such as the use of Bluetooth is a term for sending and receiving up to 10 meters, or we use Wi-Fi, too we can use if we are in The signal covers a radius. But if we leave the radius Connection will be lost immediately.
         Currently use this type. For example, using Wi-MAX 802.16d is unfortunate user can not move out of service. The connection is lost immediately. It will not be able to catch Roaming with Wi-MAX towers in the neighborhood.

End of story Mobile Wireless in the Pink. Fixed Wireless is the same principle, but what the difference is the use of Mobile Wireless Roaming will be able to use. Other areas by the connection remain active continuously. For example, using cell phones during the 2G / 3G or HSPA, we can use Video Call, or Download the data continuously while we were moving in the areas of service 3G or with the use of Wi-BRO (Wireless Broadband) is. Wi-MAX 802.16e is the same for the development of new forms that can cross over to Roaming the neighborhood. The Roaming or we may call another that the "Hand Over" is that we make the connection to send and receive Data with base station or the service point and a movement to use in other areas. The connection remains active continuously.