星期六, 5月 20, 2006

4G

4G communication at 100 Mbit/s while moving, and 1 Gbit/s while stationary.

Pervasive networks
  • simultaneously connected to several wireless access technologies (Wi-Fi, UMTS for example) and can seamlessly move between them (handover)
  • smart-radio aka cognitive radio technology to efficiently manage spectrum use and transmission power
  • mesh routing protocols
  • 4G may use OFDM , and also OFDMA.
  • packet switching only
In general, a generation is defined by the result of technology changes over a 10-15 year time frame. Thus, 4G would refer to whatever is deployed in the 2010-2015 period, assuming 3G deployment spans the 2000-2009 period.

See Wikipedia 4G

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