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4G Technology

Introduction:

?4G stands for the fourth generation of cellular wireless standards.

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

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

Objectives of 4G Technology:

  • ?4G is being developed to accommodate the QoS
  • ?Mobile broadband access
  • ?MMS
  • ?Video chat
  • ?Mobile TV like HDTV
  • ?Digital video broadcasting
  • ?A data rate of at least 100Mbit/s
  • ?Smooth hand off across heterogeneous networks
  • ?An all IP, packet switched network.

ITU Requirement And 4G Technology:

  • ?Based on an all-IP packet switched network.
  • ?Peak data rates of up to approximately 100Mbit/s
  • ?Scalable channel bandwidth, between 5 and 20MHz, optionally up to 40MHz
  • ?802.16m standardized by the IEEE (i.e. WiMAX)
  • ?LTE Advanced standardized by the 3GPP

Principles of Technology:

  • ?MIMO
  • ?OFDM/OFDMA
  • ?Turbo principle error-correcting codes
  • ?Channel-dependent scheduling
  • ?IP V6

Data Rates Table:

4G Candidate Systems:

  • ?LTE Advanced
  • ?IEEE 802.16m or WirelessMAN-Advanced
  • ?3GPP Long Term Evolution (LTE)?
  • ?Mobile WiMAX (IEEE 802.16e)?
  • ?UMB (formerly EV-DO Rev. C)?
  • ?Flash-OFDM?
  • ?iBurst 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:

  • ?High usability: anytime, anywhere, and with any technology
  • ?Support for multimedia services at low transmission cost
  • ?Personalization
  • ?Integrated services

 

Awadhesh Kumar

Jain Software Developers