4G Technology is basically the extension in the 3G technology with more bandwidth and services offers in the 3G.
Currently 2G Technology (GSM), or second generation technology, is widely used worldwide for cell phone networks. The problem with 2G technology is that the data rates are limited. This makes it inefficient for data transfer applications such as video conferencing, music or video downloads.
And 3G technology is not also available easily and it is very costly too. 3G technology porvides up to 2 Mbps speed at the stationary devices.
But 4G technology offers very high data rates. It provides up to 100 Mbps download and 50 Mbps upload speed to the mobile devices which is up to 200km/hr in speed. And for the stationary devices, it provides up to 1 Gbps download speed. Which is amazingly fast.
4G networks, when tied together with mobile phones with in-built higher resolution digital cameras will facilitate video blogs.
Facilities such as ultra-broadband Internet access, IP telephony, gaming services, and streamed multimedia may be provided to users.
4G can greatly anticipate in evolving and advancing the pervasive computing. The aim of pervasive computing is to attach itself to every living space possible, so that human beings remain intact with the wireless technology intentionally and unintentionally.
4G is be able to connect various high speed networks together, which would enable each one of us to carry digital devices even in dispersed locations.
In the 4G mobile era, the access to the mobile services will be evolved to an open Mobile Cloud so that it is fully open to any developers and providers. In this way, any non-wireless industries, such as Google, Microsoft, Oracle, SAP, GM, Bank of America can provide services for their mobile users.
The word MAGIC also refers to 4G technology which stands for Mobile multimedia, Any-where, Global mobility solutions over, Integrated wireless and Customized services!
Technical Aspects
- It use IPv6.
- The technologies used in the 4G technology are UMTS, OFDM, SDR, TD-SCDMA, MIMO and WiMAX to the some extent.
- The network operators worldwide would be able to deploy wireless mesh networks and make use of cognitive radio technology for widespread coverage and access.
- 4G technology is based on packet switched only.
- It can use both orthogonal frequency division multiplexing (OFDM) and orthogonal frequency division multiple access (OFDMA).
- 4G is also capable of using multiple input / multiple output technology (MIMO).this antenna technology is used to optimize the data speed and reduce the errors in the networks.
- UMTS is part of 4G because it can enables 4G to make use of international mobile phone roaming via using GSM (Global system for Mobile Communications).
- TD-SCDMA is also used in 4G technology. Time division synchronous code division multiple access (TD-SCDMA) provides support to 4G to transfer both circuit switched data like video and voice and packet switched data.
- The flexibility of 4G technologies to be used in combination with GSM and CDMA has provided it an edge over other technologies
- The mobile device system architecture will be open in order to converge multiple RTTs (radio transmission technologies) in one same device.
- In the OWA system, you can just change RTT card in your Smartphone to switch your wireless standards, or you can integrate multiple wireless standards in one RTT SIM card.
- Based on this OWA platform, you can integrate home phone, office phone and mobile phone into one common Personal device - it is more beyond just a phone.
- To cater the growing needs of 4G, mobile data communication providers will deploy multiple antennas at transmitters to increase the data rate.
- After successful implementation, 4G technology is likely to enable ubiquitous computing, that will simultaneously connects to numerous high date speed networks offers faultless handoffs all over the geographical regions.
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