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Thread: MW IP capacity calculation

  1. #1
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    Default MW IP capacity calculation

    Can anyone teach me how to calculate MW IP capacity planning for different link.

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  3. #2
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    Default Re: MW IP capacity calculation

    Hi BikU,

    Can you be little specific about which kind of latency and throughput requirement you are looking for !!

  4. #3
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    Default Re: MW IP capacity calculation

    you may ask your MW equipment vendor to get the capacity specs of their products. The capacity you can utilize over the radio link is depending on channels spacing and modulation scheme used.
    What kind of radio are you using?

    CR

  5. #4
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    Default Re: MW IP capacity calculation

    are you asking about how to calculate the capacity of aggregated link when we have chain topology.

  6. #5
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    Default Re: MW IP capacity calculation

    Ya rm77 i'm asking capacity to calculate aggregated link in chain topology

  7. #6
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    Default Re: MW IP capacity calculation

    Hi ;
    you can use gauss method.

    thx.

  8. #7
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    Default Re: MW IP capacity calculation

    U can start from Shannon theorem :giving a fixed Modulation and bandwidth Shannon tell u the maximum guaranteed throughput L1. ( exemple :56MHz channels with 256QAM modulation u can trasnport about 342Mbps (more or less with everage rol off factor)---U CANNOT DO BETTER!! it's physical constrain.
    then u need to convert L1 bitsream (gave by Shannon) in L2 or L3 (IP) thruoghput basically counting Frames and size (if u need help , ask)
    then some vendor use trickng adding compression.

    doubling the channel space (exemple using 112MHz vs 56MHz ) results in double troughput (or half if use 28MHz vs 56MHz)
    Jumping to the next modulation (ex 512QAM vs 256QAM) DO NOT results double factor but x/y factor(becareful!) because it's 2^x VS 2^y (where x and y are number of bit per symbol transported)
    256QAM vs 1024QAM + 25% throughput more
    1024QAM vs 2048QAM + 10% throughput more
    2048QAM vs 4096QAM + 8% ........
    Back to real world ... if u need data i can provide throughput for all Microwave vendors (typical and with compressions)

  9. #8
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    Default Re: MW IP capacity calculation

    if u want to know how to dimension the network
    instead calculate MW capacity
    go to read this doc
    http://www.ngmn.org/uploads/media/NG...Estimation.pdf

  10. Thanks rkdrkd thanked for this post
  11. #9
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    Default Re: MW IP capacity calculation

    "then u need to convert L1 bitsream (gave by Shannon) in L2 or L3 (IP) thruoghput basically counting Frames and size (if u need help , ask)"
    Yes need helps on the methodolgy and applicable rules. Many thanks

    "if u need data i can provide throughput for all Microwave vendors (typical and with compressions)"
    Yes throughputs per vendors will help. Many thanks.

  12. #10
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    Default Re: MW IP capacity calculation

    L2 Throughput = Frame Length / (Frame Length

    + Preamble + IFG) x L1 Throughput




    Typical transmission of 256-QAM at 56 MHz
    L2 Throughput = 64 / (64+8+12) x 446.8 =

    0.762 x 446.8 = 340 Mb/s

    i hope this help




    Last edited by simog72; 2015-04-23 at 07:47 PM

  13. Thanks oliv1912, smartem thanked for this post

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