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Member
Reputation: 22
MW IP capacity calculation
Can anyone teach me how to calculate MW IP capacity planning for different link.
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2014-02-05 12:23 PM
# ADS
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Re: MW IP capacity calculation
Hi BikU,
Can you be little specific about which kind of latency and throughput requirement you are looking for !!
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Member
Reputation: 261
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
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Member
Reputation: 252
Re: MW IP capacity calculation
are you asking about how to calculate the capacity of aggregated link when we have chain topology.
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Member
Reputation: 22
Re: MW IP capacity calculation
Ya rm77 i'm asking capacity to calculate aggregated link in chain topology
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Member
Reputation: 252
Re: MW IP capacity calculation
Hi ;
you can use gauss method.
thx.
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Moderator
Reputation: 153
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)
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Moderator
Reputation: 153
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
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Post Thanks - 1 Thanks
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Member
Reputation: 82
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.
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Moderator
Reputation: 153
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
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Post Thanks - 2 Thanks
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