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4G Technology

Introduction:

ž4G stands for the fourth generation of cellular wireless standards.

žIt is a successor to 3G and 2G families of standards.

žFourth generation mobile communications systems that are characterized by high-speed data rates at 20 to 100 Mbps

Objectives of 4G Technology:

  • ž4G is being developed to accommodate the QoS
  • žMobile broadband access
  • žMMS
  • žVideo chat
  • žMobile TV like HDTV
  • žDigital video broadcasting
  • žA data rate of at least 100 Mbit/s
  • žSmooth hand off across heterogeneous networks
  • žAn all IP, packet switched network.

ITU Requirement And 4G Technology:

  • žBased on an all-IP packet switched network.
  • žPeak data rates of up to approximately 100 Mbit/s
  • žScalable channel bandwidth, between 5 and 20 MHz, optionally up to 40 MHz
  • ž802.16m standardized by the IEEE (i.e. WiMAX)
  • žLTE Advanced standardized by the 3GPP

Principles of Technology:

  • žMIMO
  • žOFDM/OFDMA
  • žTurbo principle error-correcting codes
  • žChannel-dependent scheduling
  • žIP V6

Data Rates Table:

4G Candidate Systems:

  • žLTE Advanced
  • žIEEE 802.16m or WirelessMAN-Advanced
  • ž3GPP Long Term Evolution (LTE)ž
  • žMobile WiMAX (IEEE 802.16e)ž
  • žUMB (formerly EV-DO Rev. C)ž
  • žFlash-OFDMž
  • žiBurst and MBWA (IEEE 802.20) systems

3G Vs 4G:

3G Technology:

  • Predominantly voice driven – data was always add on
  • Wide area cell-based
  • 1800-2400 MHz
  • Circuit and packet switched networks.
  • Combination of existing & evolved equipment.
  • Data rate (up to 2Mbps).
  • Optimized antenna design, multi-band adapters
  • A number of air link protocols, including IP

4G Technology:

  • Converged data and voice over IP
  • Hybrid – Integration of Wireless LAN (WiFi, Bluetooth) and wide area.
  • Higher frequency bands 2-8 GHz
  • Entirely packet switched networks.
  • All network elements are digital.
  • Higher bandwidth (up to 100Mbps).
  • Smarter Antennas, software multi-band and wide band radios
  • All IP (IPv6.0)

Features:

  • žHigh usability: anytime, anywhere, and with any technology
  • žSupport for multimedia services at low transmission cost
  • žPersonalization
  • žIntegrated services

 

Awadhesh Kumar

Jain Software Developers