mirror of
https://github.com/Telecominfraproject/oopt-gnpy.git
synced 2025-10-31 01:57:54 +00:00
102 lines
3.9 KiB
Python
102 lines
3.9 KiB
Python
#!/usr/bin/env python3
|
|
# -*- coding: utf-8 -*-
|
|
# @Author: Jean-Luc Auge
|
|
# @Date: 2018-02-02 14:06:55
|
|
|
|
from gnpy.core.elements import Edfa
|
|
import numpy as np
|
|
from json import load
|
|
import pytest
|
|
from gnpy.core.elements import Transceiver, Fiber, Edfa
|
|
from gnpy.core.utils import lin2db, db2lin
|
|
from gnpy.core.info import create_input_spectral_information, SpectralInformation, Channel, Power
|
|
from gnpy.core.equipment import load_equipment
|
|
from gnpy.core.network import build_network, load_network
|
|
from pathlib import Path
|
|
from networkx import dijkstra_path
|
|
from numpy import mean
|
|
|
|
#network_file_name = 'tests/test_network.json'
|
|
network_file_name = Path(__file__).parent.parent / 'tests/LinkforTest.json'
|
|
#network_file_name = Path(__file__).parent.parent / 'examples/edfa_example_network.json'
|
|
eqpt_library_name = Path(__file__).parent.parent / 'tests/data/eqpt_config.json'
|
|
|
|
@pytest.fixture(params=[(96, 0.05e12), (60, 0.075e12), (45, 0.1e12), (2, 0.1e12)],
|
|
ids=['50GHz spacing', '75GHz spacing', '100GHz spacing', '2 channels'])
|
|
# TODO in elements.py code: pytests doesn't pass with 1 channel: interpolate fail
|
|
def nch_and_spacing(request):
|
|
"""parametrize channel count vs channel spacing (Hz)"""
|
|
yield request.param
|
|
|
|
def propagation(input_power, con_in, con_out,dest):
|
|
equipment = load_equipment(eqpt_library_name)
|
|
network = load_network(network_file_name,equipment)
|
|
build_network(network, equipment, 0, 20)
|
|
|
|
# parametrize the network elements with the con losses and adapt gain
|
|
# (assumes all spans are identical)
|
|
for e in network.nodes():
|
|
if isinstance(e, Fiber):
|
|
loss = e.loss_coef * e.length
|
|
e.con_in = con_in
|
|
e.con_out = con_out
|
|
if isinstance(e, Edfa):
|
|
e.operational.gain_target = loss + con_in + con_out
|
|
|
|
transceivers = {n.uid: n for n in network.nodes() if isinstance(n, Transceiver)}
|
|
|
|
p = input_power
|
|
p = db2lin(p) * 1e-3
|
|
spacing = 0.05 # THz
|
|
si = SpectralInformation() # SI units: W, Hz
|
|
si = si.update(carriers=[
|
|
Channel(f, (191.3 + spacing * f) * 1e12, 32e9, 0.15, Power(p, 0, 0))
|
|
for f in range(1,80)
|
|
])
|
|
source = next(transceivers[uid] for uid in transceivers if uid == 'trx A')
|
|
sink = next(transceivers[uid] for uid in transceivers if uid == dest)
|
|
path = dijkstra_path(network, source, sink)
|
|
for el in path:
|
|
si = el(si)
|
|
print(el) # remove this line when sweeping across several powers
|
|
edfa_sample = next(el for el in path if isinstance(el, Edfa))
|
|
nf = mean(edfa_sample.nf)
|
|
|
|
print(f'pw: {input_power} conn in: {con_in} con out: {con_out}',
|
|
f'OSNR@0.1nm: {round(mean(sink.osnr_ase_01nm),2)}',
|
|
f'SNR@bandwitdth: {round(mean(sink.snr),2)}')
|
|
return sink , nf
|
|
|
|
test = {'a':(-1,1,0),'b':(-1,1,1),'c':(0,1,0),'d':(1,1,1)}
|
|
expected = {'a':(-2,0,0),'b':(-2,0,1),'c':(-1,0,0),'d':(0,0,1)}
|
|
|
|
@pytest.mark.parametrize("dest",['trx B','trx F'])
|
|
@pytest.mark.parametrize("osnr_test", ['a','b','c','d'])
|
|
def test_snr(osnr_test, dest):
|
|
pw = test[osnr_test][0]
|
|
conn_in = test[osnr_test][1]
|
|
conn_out =test[osnr_test][2]
|
|
sink,nf = propagation(pw,conn_in,conn_out,dest)
|
|
osnr = round(mean(sink.osnr_ase),3)
|
|
nli = 1.0/db2lin(round(mean(sink.snr),3)) - 1.0/db2lin(osnr)
|
|
pw = expected[osnr_test][0]
|
|
conn_in = expected[osnr_test][1]
|
|
conn_out = expected[osnr_test][2]
|
|
sink,exp_nf = propagation(pw,conn_in,conn_out,dest)
|
|
expected_osnr = round(mean(sink.osnr_ase),3)
|
|
expected_nli = 1.0/db2lin(round(mean(sink.snr),3)) - 1.0/db2lin(expected_osnr)
|
|
# compare OSNR taking into account nf change of amps
|
|
osnr_diff = abs(osnr - expected_osnr + nf - exp_nf)
|
|
nli_diff = abs((nli-expected_nli)/nli)
|
|
assert osnr_diff <0.01 and nli_diff<0.01
|
|
|
|
|
|
if __name__ == '__main__':
|
|
from logging import getLogger, basicConfig, INFO
|
|
logger = getLogger(__name__)
|
|
basicConfig(level=INFO)
|
|
|
|
for a in test :
|
|
test_snr(a,'trx F')
|
|
print('\n')
|