MW IP capacity calculation

[Biku]

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

[jaysingh]

Hi BikU,

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

[Cost_Reducer]

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

[rm77]

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

[Biku]

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

[rm77]

Hi ;
you can use gauss method.

thx.

[simog72]

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)

[simog72]

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/NGMN_Whitepaper_Guideline_for_LTE_Backhaul_Traffic_Estimation.pdf

[oliv1912]

"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.

[simog72]

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