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What's 4G? Ans
What's WiMAX? Ans
What's LTE? Ans

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What's 4G?

- 4G mobile generation: LTE and WiMax overview

Mary C. | Jan 27 2012

In many countries where the third generation is firmly entrenched, they are awaiting the fourth. Unlike 3G networks, which are built on circuit switching infrastructure of 2G networks. The 4G is totally another network that uses Internet Protocol (IP, Internet Protocol) as a base and speeds similar to that of wired broadband networks.

What 4G is?

With the 4G arrival, the ITU-R (the division of the ITU Radio) drafted a document known as 4G/IMT, which establishes the minimum requirements for fourth-generation services. In this document the ITU has established that the 4G "should be a completely new network, a network of networks and a fully integrated system based on IP protocol, convergence of wired and wireless networks." 4G networks will be entirely IP packet switching.

According to ITU, 4G networks will be offer the next features:

  • It will provide downstream data rates of 100 Mbps and 1 Gbps, in outdoor environments (mobile) and indoor (fixed), respectively (ITU established a maximum speed of 2 Mbps in indoor environment for 3G networks).
  • 4G networks will have quality of service (QoS) and high security end to end.
  • They offer any service at any time, anywhere, with transparent interoperability, always active, with competitive prices, in a single receipt and fully customized.
  • The main points of the document of 4G/IMT wrote by ITU-R for the fourth generation are:

  • High degree of commonality of functionality worldwide, while maintaining the flexibility to support a wide range of services and applications at a cost efficient.
  • Compatibility of services with mobile networks and fixed networks.
  • Interconnection capacity with other radio systems.
  • High quality mobile services.
  • Applications and services easy for users.
  • Global connectivity (roaming).
  • High data rates to support advanced services and applications.

    Finally the 4G radio technologies should include:

  • OFDMA (Orthogonal Frequency-Division Multiple Access), a multicarrier modulation scheme highly efficient.
  • MIMO (Multiple Input Multiple Output) multiple antenna system that minimizes data and speed errors.
  • WiMax vs LTE   |   Ceullar standard evolution (from 2G to 4G)

    
     WiMAX vs LTE
    Mobile standard evolution
    China 4G evolution
    Celluar and wireless evolution
    Celluar technology history
    From 0G ~ 5G
    I Don't Care! (fun)
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    4G is the short name for fourth-generation wireless, the stage of mobile communications that will enable things like IP-based voice, data, gaming services and high quality streamed multimedia on portable devices with cable modem-like transmission speeds. It's a successor to 2G and 3G wireless, whereby the first signified the shift from analog to digital transmissions, bringing data services like SMS and email to mobile phones for the first time, and the second refers to the advent of things like global roaming as well as higher data rates.