Controller Based WLANs

What is the formula for "R Factor" incase of Voice calls?

by on ‎06-27-2014 01:02 PM

Environment : Voice Over WLAN

 

R Factor is calculated as per the below formula:

R = Ro -Is -Id -Ie +A
 

  • Ro: expresses the basic signal-to-noise ratio.
  • Is: This factor represents all impairments which occur more or less simultaneously with the voice signal, such as too loud speech level, non-optimum side tone, quantization noise, etc.
  • Id: This is the delay impairment factor which sums up all impairments due to delay and echo effects.
  • Ie: This is the equipment impairment factor which represents impairments which are caused by low bit-rate codecs. This factor can be used to take into account the influence of packet loss.
  • A: The advantage factor A represents an advantage of access which certain systems may provide in comparison to conventional systems.
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