IEEE 802.20 - Technical Description

Technical Description

The standard's proposed benefits:

  • IP roaming & handoff (at more than 1 Mbit/s)
  • New MAC and PHY with IP and adaptive antennas
  • Optimized for full mobility up to vehicular speeds of 250 km/h
  • Operates in Licensed Bands (below 3.5 GHz)
  • Utilizes Packet Architecture
  • Low Latency

Some technical details were:

  • Bandwidths of 5, 10, and 20 MHz.
  • Peak data rates of 80 Mbit/s.
  • Spectral efficiency above 1 bit/sec/Hz using multiple input/multiple output technology (MIMO).
  • Layered frequency hopping allocates OFDM carriers to near, middle, and far-away handsets, improving SNR (works best for SISO handsets.)
  • Supports low-bit rates efficiently, carrying up to 100 phone calls per MHz.
  • Hybrid ARQ with up to 6 transmissions and several choices for interleaving.
  • Basic slot period of 913 microseconds carrying 8 OFDM symbols.
  • One of the first standards to support both TDM (FL,RL) and separate-frequency (FL, RL) deployments.

Read more about this topic:  IEEE 802.20

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