Monday, July 19, 2010
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What is 3G? Generation of 3G.

What is 3G?

3G (or 3-G) is short for third-generation mobile telephony. The services connected with the third generation offer the ability to transfer both voice and data (a telephone call) and non-voice data (such as downloading programs, exchanging email, and instant messaging).

Initially the installation of 3G network was too slow. This was because the operators need to acquire an additional license for a frequency spectrum was different from previous technologies used by 2G. The first country to implement a commercial 3G network on a large scale was Japan. Currently, there are 164 commercial networks in 73 countries using the WCDMA technology.

Speed:
The International Telecommunication Union (ITU) has not offered a clear definition of the speed users can expect from 3G equipment. Thus, users with 3G services are not capable of taking a standard speed and see if it meets specified. Although states are expected to IMT-2000 offers higher transfer rates (a minimum of 2Mbit / s for users who are moving or still, and 348 kbit / s in a moving vehicle), the ITU does not clearly specify the minimum speed or what interface modes are equivalent to 3G, so various speeds are sold as if they were 3G. Often, industry sources say they expect the 3G offers speeds of 384 kbit / s to people while walking, but only 128 kbit / s in a moving car. While EDGE is part of the 3G standard, some phones differentiate the availability of 3G and EDGE networks as separate things.

Advantage:

Packet-based IP, because you only pay on the basis of the discharge which is relatively lower cost. But depending on the type of user also can qualify as disadvantaged.
High transmission speed: the result of the evolution of technology today can reach speeds in excess of 3 Mbit/ s per mobile user.

More access speed:

UMTS, added to support Internet protocol (IP), combine powerfully to deliver multimedia services and new broadband applications such as video-telephony services and video-conference.Voice quality comparable to fixed networks.

Disadvantages:

Limited coverage. Depending on our location transfer speed can drastically reduce (or even devoid of cover).
Decrease speed if the device from which we connect is in motion (for example if we circulate in automobiles).
No connection-oriented. Each of the packets can follow different routes between the origin and destination, so it can get messy or duplicates.

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