How to calculate otn frame bit rates
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This document discusses how to calculate frame bit rates for Optical Transport Network (OTN). It provides a master formula to calculate bit rates for different O(P/D/T)Us by using a multiplicative factor M and the granularity X of STM-16. As an example, it calculates the OTN frame size, bit rate, frame rate, and frame frequency for different ODUk, OTUk, and OPUk rates by applying the provided formulas and values.
How to calculate otn frame bit rates
- 1. How to calculate OTN Frame bit rates ? We know that in SDH i.e. 125us.frame rate is fixed But in case of OTN, it is variable rather .frame size is fixed So, frame rate calculation for OTN could be done by following method:- Frame Rate (us) =ODUk frame size(bits) ODUk bit rate(bits/s)...........................................(1)/ Also, we know that STM16=OPU1==16*9*270*8*8000=2488320000 bits/s Now assume that multiplicative factor for rate calculation of various rates(M )k Mk= OPUk=(238/239-k) ODUk=239/(239-k) OTUk=255/(239-k) Now, Master Formula to calculate bit rate for different O(P/D/T)U will bek Bit Rate for O(P/D/T)Uk b/s =M *X*STM16=M *X*2488320000 b/sk k ...........(2) Where X=granularity in order of STM16 for OTN bit rates(x=1,4,40,160) Putting values of equation(2) in equation(1) we will get OTN frame rates. Eg:- OTN RATE OTN Bit Rate(bps) OTN frame size(bits) OTN frame rate (us) OTN frame frequency(KHz) ODUk frame size= =4*3824*8 ODU0 1244160000 122368 98.35390947 10.16736402 ODU1 2498775126 122368 48.97119342 20.42016807 ODU2 9995100504 122368 12.24279835 81.68067227 ODU3 39980402017 122368 3.060699588 326.7226891 ODU4 99951005042 122368 1.224279835 816.8067227 ODU5 399804020168 122368 0.306069959 3267.226891 OTUk frame size=4*4080*8 OTU1 2666057143 130560 48.97119342 20.42016807 OTU2 10664228571 130560 12.24279835 81.68067227 OTU3 42656914286 130560 3.060699588 326.7226891 OTU4 106642285714 130560 1.224279835 816.8067227 OTU5 426569142857 130560 0.306069959 3267.226891 OPUk frame size=4*3808*8 OPU0 1238954310 121856 98.35390947 10.16736402 OPU1 2488320000 121856 48.97119342 20.42016807 OPU2 9995276962 121856 12.19135802 82.02531646 OPU3 100376298305 121856 1.21399177 823.7288136 OPU4 403213725957 121856 0.302211934 3308.93617 www.mapyourtech.com