The presence of mobile telephone service alias in our lives is a big leap in the history of human communication. Technology Mobile communication technology is the most modern and most promising both in terms of quality, efficiency and economy. One of the main advantages is the mobile phone can provide flexibility for users to communicate anywhere and anytime, even while moving though.
Communication or move into the mobile communication trends and lifestyle of the tune. Even in many countries such as Indonesia, Japan and Finland, mobile phone subscribers, more than that customers home phone or device (fixed phone).
In one country, there are many mobile operators compete to provide the best services, considering the benefits that arouse out of the business. Say Indonesia Telkomsel and Indosat has a pro-2G technology platforms, and recently appeared with the service platform that is 3G, Telkom Flexi, Fren and Esia / Mobile 8. Japan with the first NTTDoCoMo already using 3G technology, compared to other Asian countries. Japanese government policy to shift from 2G to 3G because of the needs of the market up. In addition, 3G technology can meet the needs.
3G means third generation is, of course, related to the telecommunications provider or telephone provider. AMPS is the first technology & NMT. Then the two generations to be spelled out is a GSM and CDMA.GSM developed by the company – corporate communications in Western Europe, while CDMA was developed by Qualcomm in the USA. Then, in the GSM technology, GPRS technology is developed, which then can be spelled out to the 2.5 generation.
Third generation or 3G technology based on W-CDMA using frequency 1900 MHz, CDMA service provider that is operating in the frequency of 1900 MHz should eventually Hijrah to 800 MHz frequency that is Flexi and Starone because the frequency used by 3G operators. CDMA technology, while also being the generation to which it referred to as 3 CDMA EVDO.
3G (read: triji) is the abbreviation of the term in English: third-generation technology. This term is generally used to refer to the development of wireless phone technology (wireless). In general, the ITU-T, as quoted by the FCC defines 3G as a wireless solution that can provide access speed:
• of 144 Kbps for fast-moving conditions (mobile).
• 384 Kbps to as much as the condition of running (pedestrian).
• of 2 Mbps for the condition in a static place.
There is also the development of wireless technology can be as follows:
1. First generation: analog, low-speed (low-speed), enough to vote. Example: NMT (Nordic Mobile Telephone) and AMPS (Analog Mobile Phone System).
2. Second generation: digital, low speed – medium. Example: GSM and CDMA2000 1xRTT.
3. Third generation: digital, high-speed (high-speed), for wide-band (broadband). Example: W-CDMA (or UMTS as well as the known) and CDMA2000 1xEV-DO.
Between second-generation and generation-3, often inserted Generation 2.5, which is digital, medium speed (up to 150 Kbps). The technology category entry is 2.5 G-based data services such as GPRS (General Packet Radio Service) & EDGE (Enhance Data rate for GSM Evolution) in the GSM domain and pdn (Packet Data Network) in the CDMA domain.
At this time there are two branches of development of 3G, that is from the GSM (Global System for Mobile Communication) dipelopori by the 3G Partnership Project and CDMA (Code Division Multiple Access) dipelopori by the 3G Partnership Project 2 (3GPP2). The two technologies are not compatible and indeed compete.
One of the reasons why the 3G service can provide a greater throughput is due to the use of spread spectrum technology that allows data input that would ditransimisikan assigned to the entire frequency spectrum. In addition to getting the band width of the larger, spread spectrum-based services is far more secure than the timeslot and / or frequency slots.
3G network is not upgraded from the 2G, 2G operator affiliated with the 3GPP will need to replace many components to be able to provide 3G services. While the operator is affiliated with the 2G technology in 3GPP2 easily upgrade to the 3G network because the element is designed for services to the wireless wide band (wireless broadband). 3G services have also been digembar rant but in reality, many found the failure. Japan and South Korea are examples where 3G services successfully. This is probably caused by factors:
1. Support the government.
The Japanese government does not charge in advance (upfront fee) for use on 3G spectrum licenses-service operator in Japan (there are three operators: NTT DoCoMo, KDDI and Vodafone). Meanwhile, South Korean government, even though any charge in advance, providing incentives and assistance in the development of wireless wide band (South Korea is a country that uses Cisco Gigabit Switch Router highest in the world) as part of a strategy in infrastructure development.
2. Culture community.
Video call service, which diramal a killer application is not too much is used in the two countries. However, services such as music downloads and Internet access very tune. Operators such as NTT DoCoMo (Japan) to provide service Chaku Uta to download music. While in Korea, services like Cyworld web presence provided by SK Tel, great tune. With this service, customers can take photos directly from the handset and the web portal to memuatnya own in Cyworld. This service is then imitated by Flickr with the N73 handset.
3. The variety of content services.
DoCoMo SKTel and does not use the WAP as a standard service to its content. DoCoMo to develop a browser application which is called imode, while SKTel have Nate and June.
Evolution Towards 3G
Telecom mobile phone network has increased the use of 3G services from 1999 to 2010. Japan is the first country to introduce 3G in the national and the transition toward 3G in Japan has been achieved in the year 2006. After the Korean pengadopsi be the first 3G network and the transition has been achieved in early 2004, leading the world in the field of telecommunications.
Operator and the UMTS network in 2005, the evolution of 3G network running for several years due to the limited capacity of the existing 2G network. 2G networks were created with the main goal is data and voice transmission is slow. Due to rapid flow changes in the user’s request, the needs of their wireless akan not met.
“2.5G” (and also 2.75 G) is a technology such as data service i-mode, the phone berkamera, exchange a series of high-speed data (or also called High-Speed Circuit-switched data or HSCSD abbreviated) and the general packet radio (or known as General Packet Radio Service or GPRS) was created to provide some funsi major networks such as 3G, but without a full transition to 3G network. Service-This service was created to introduce the possibility of implementing wireless technology to users and penigkatan demand for 3G services.
Misconception about 3G
There is some understanding that one of the 3G in the general public.
1. 3G services can not be without any coverage of the 3G service operator. Just buy a 3G handset, it does not mean that 3G services can be enjoyed. Handset can automatically switch to a 3G network when you, the customer does not receive 3G coverage. So when someone is being moved and use the video call service, and then forced to switch to the 2G network, the video call service will drop out.
2. 3G services are at a frequency of 1900 Mhz. ITU-T defines the 3G services for GSM in the 1900 Mhz frequency band with a width of 60 Mhz. However, in general, based on CDMA2000 technology uses spectrum in the frequency of 800 Mhz, or commonly known as the spectrum PCS (Personal Communication System).
High-Speed Downlink Packet Access (HSDPA)
High-Speed Downlink Packet Access (HSDPA) is a protocol and mobile phone technology, sometimes referred to as 3.5 G. First phase with a HSDPA 4.1 Mbps. Phase 2 and then follow with a 11 Mbps and maximum kapsitas peak downlink data rate up to 14 Mbit / s. This technology was developed from the WCDMA the same as EV-DO CDMA2000 develop. HSDPA provides evolution path for network Universal Mobile Telecommunications System (UMTS), which allows for the use of data capacity is greater (up to 14.4 Mbit / sec down direction).
HSDPA is an evolution of W-CDMA standard and is designed to increase data transfer speeds 5x higher. HSDPA memdefinisikan a channel W-CDMA is a new, namely high-speed downlink shared channel (HS-DSCH), which is operating with a different channel W-CDMA is now. Up to now only the use of HSDPA technology in the communication under the direction of mobile phone.
HSDPA is to reduce the excess tertundanya pengunduhan data (delay) and provide feedback more quickly when users use interactive applications such as mobile office or high-speed Internet access facilities for the use of games or download audio and video. Excess other HSDPA, increase system capacity without requiring additional frequency spectrum. This has caused the decreasing cost of mobile data services in a significant way.