Tuesday, August 25, 2009

3G standard

3G stands for third-generation wireless technology and networks. It is based on the International Telecommunication Union (ITU) initiative for a single global wireless standard called International Mobile Telecommunications-2000 (IMT-2000). This concept of a single standard evolved into a family of fi ve 3G wireless standards. Of those fi ve, the most widely accepted are CDMA2000, WCDMA (UMTS) and TD-SCDMA. According
to the ITU and IMT-2000, a wireless standard must meet minimum bit-rate requirements to be considered 3G:


• 2 Mbps in fixed or in-building environments
• 384 kbps in pedestrian or urbanenvironments
• 144 kbps in wide area mobileenvironments
• Variable data rates in large geographic areasystems (satellite)


In addition to providing faster bit rates and greater capacity over previous-generation technologies, 3G standards excel by effectively:


• Delivering mobile data
• Offering greater network capacity
• Operating with existing second-generation technologies
• Enabling rich data applications such as VoIP, video telephony, mobile multimedia,interactive gaming and more.

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