3G CELLULAR STANDARDS WITH PATENTS


3G CELLULAR STANDARDS

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3G CELLULAR STANDARDS Projects

3G CELLULAR STANDARDS WITH PATENTS


What is 3G?

3G is the next generation of wireless network technology that provides high speed bandwidth (high data transfer rates) to handheld devices. The high data transfer rates will allow 3G networks to offer multimedia services combining voice and data. Specifically, 3G wireless networks support the following maximum data transfer rates: o 2.05 Mbits/second to stationary devices. o 384 Kbits/second for slowly moving devices, such as a handset carried by a walking user. o 128 Kbits/second for fast moving devices, such as handsets in moving vehicles. These data rates are the absolute maximum numbers. For example, in the stationary case, the 2.05 Mb/second rate is for one user hogging the entire capacity of the base station. This data rate will be far lower if there is voice traffic (the actual data rate would depend upon the number of calls in progress). The maximum data rate of 128Kbits/second for moving devices is about ten times faster than that available with the current 2G wireless networks. Unlike 3G networks, 2G networks were designed to carry voice but not data. 3G wireless networks have the bandwidth to provide converged voice and data services. 3G services will seamlessly combine superior voice quality telephony, high-speed mobile IP services, information technology, rich media, and offer diverse content. Some characteristics of 3G services that have been proposed are: o Always-on connectivity. 3G networks use IP connectivity, which is packet based. o Multi-media services with streaming audio and video.o Email with full-fledged attachments such as PowerPoint files. o Instant messaging with video/audio clips. o Fast downloads of large files such as faxes and PowerPoint files. o Access to corporate applications.

3G networks offer users advantages such as:

 

  •  New radio spectrum to relieve overcrowding in existing systems.
  •  More bandwidth, security, and reliability.
  •  Interoperability between service providers.
  •  Fixed and variable data rates.
  • Asymmetric data rates.
  • Backward compatibility of devices with existing networks.
  •  Always-online devices. 3G will use IP connectivity, IP is packet based (not circuit based).
  •  Rich multimedia services


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