Fourth Generation (4G) Communications systems for new generation technology. 4G technology is the latest technology after the 3G (third generation) systems. This 4G Communication systems still solving the remaining problems of 3G systems.

The main applications of this 4G communication system to provide a wide range variety of new services, from high-quality voice to high-definition video to high-data-rate wireless channels. The 4G is used broadly to include different types of broadband wireless access communication systems.

One of the terms used to define 4G Communications systems is MAGIC – “Mobile multimedia, anytime anyplace, Global mobility support, integrated wireless solution, and customized service.”

4G Communications systems that’s cellular broadband wireless access systems have been attracting much interest in the mobile communication technology.

This new generation of wireless communication systems replaces the 3G systems , in 5 to 10 years. It can be used to access the data information from any place, any time, with a seam less connection to a wide range of information and services.

The main key features of 4G are receiving a large volume of information, data, pictures, video and so on. The future 4G systems infrastructures will consist of set of various networks using IP-internet protocol as common protocol by this users will be able to access every application and environment.

For high quality , streaming video and audio , these 4G systems will be able to accommodate growing consumer and business expectations. Few days back the Japanese local papers says that Japan, china, South Korea plan to work together for developing new generation technologies like Fourth generation mobiles. 4G orientated meeting was happened in Seoul in March with officials from the above countries, they agreed to share information and work together on developing 4G mobile phones

4G mobile phone technology supports IPv6 – “Internet Protocol version 6″ and provides faster communication speeds “100 mbps “, capacity and diverse usage formats. These formats would support for other public networks such as optical fiber and wireless local area networks.

4G is now currently an ideal. Still, some technology companies they are incorporating latest technical advances into cellular technology. They use to calling “3.5G” techno. Someday this 4G networks may replace all existing 2.5G and 3G technologies .

EV-DO means “Evolution- Data Optimized” or” Evolution- Data only”. It is a standard telecommunication services for the wireless transmission of data. This EVDO service is for broadband internet access. It uses radio frequency signals for data transmission. It uses multiplexing techniques, code division multiple access (CDMA) and time division multiple access (TDMA).

“EVDO” is a broadband wireless service for a wide range of customers, business people, public services and students. “EVDO” provides fastest wireless broadband internet service. We can access the internet in car, train, at any place. We can access internet without the need for a hotspot. It is an advanced CDMA technology developed by QUALCOMM.

EVDO has a theoretical data rate of 2.4 Mbps and having bandwidth of 1.25 MHz. This is as fast as many residential DSL and broadband connections currently available in the United States.

This data rate is comparable to DSL speed. EVDO allows the user to access the internet wherever they are not only for email, but for downloads, large files, photos, spreadsheets, etc. One of the benefits of EVDO is the ability to roam seamlessly between connection points. EVDO is mostly available for mobile phones and laptops.

EVDO Users can work on a wide range of applications, including the MS Office Suite and others, so they can do business services from anywhere. “EVDO” provides plug and play services for business functions, games and Internet access from any place at any time. “EVDO” provides data authentication and data protection.

Advantages of EVDO over WIFI:

-Always on with seamless roaming.

-Signal can travel on same cell sites as cell phones

- No need to use hot spot.

- Users can access their corporate “VPN” (virtual private network) from anywhere.

How to use EVDO network?

For EVDO network First we should buy PC card. Install the software of pc card in desktop or laptop. After installation we should be able to connect the pc card into desktop or laptop. Initialize the connection and begin surfing the internet. Depending upon the software and security restrictions the user should have username and password for internet access.

Most significant advantage of EVDO over network technologies is that it uses the same broadcasting frequencies as existing CDMA networks. “EVDO” is relatively low cost with high capacity and allows web browsing and web application usage.

“EVDO” provides the opportunity for rural areas where without DSL (digital subscriber line) and high-speed Internet to receive Internet access. this is the best way to provide internet services to these rural areas. Most people are unable to find it cost effective to use an EVDO connection as a primary connection in rural places. It is a good option for people requiring an Internet connection in rural places.