mirror of
https://github.com/Telecominfraproject/oopt-gnpy.git
synced 2025-10-30 17:47:50 +00:00
202 lines
8.7 KiB
Python
Executable File
202 lines
8.7 KiB
Python
Executable File
#!/usr/bin/env python3
|
|
# -*- coding: utf-8 -*-
|
|
|
|
'''
|
|
transmission_main_example.py
|
|
============================
|
|
|
|
Main example for transmission simulation.
|
|
|
|
Reads from network JSON (by default, `edfa_example_network.json`)
|
|
'''
|
|
|
|
from gnpy.core.equipment import load_equipment, trx_mode_params
|
|
from gnpy.core.utils import db2lin, lin2db, write_csv
|
|
from argparse import ArgumentParser
|
|
from sys import exit
|
|
from pathlib import Path
|
|
from json import loads
|
|
from collections import Counter
|
|
from logging import getLogger, basicConfig, INFO, ERROR, DEBUG
|
|
from numpy import arange, mean
|
|
from matplotlib.pyplot import show, axis, figure, title
|
|
from networkx import (draw_networkx_nodes, draw_networkx_edges,
|
|
draw_networkx_labels, dijkstra_path)
|
|
from gnpy.core.network import load_network, build_network, save_network
|
|
from gnpy.core.elements import Transceiver, Fiber, Edfa, Roadm
|
|
from gnpy.core.info import create_input_spectral_information, SpectralInformation, Channel, Power, Pref
|
|
from gnpy.core.request import Path_request, RequestParams, compute_constrained_path, propagate
|
|
|
|
logger = getLogger(__name__)
|
|
|
|
def plot_results(network, path, source, destination):
|
|
path_edges = set(zip(path[:-1], path[1:]))
|
|
edges = set(network.edges()) - path_edges
|
|
pos = {n: (n.lng, n.lat) for n in network.nodes()}
|
|
labels = {n: n.location.city for n in network.nodes() if isinstance(n, Transceiver)}
|
|
city_labels = set(labels.values())
|
|
for n in network.nodes():
|
|
if n.location.city and n.location.city not in city_labels:
|
|
labels[n] = n.location.city
|
|
city_labels.add(n.location.city)
|
|
label_pos = pos
|
|
|
|
fig = figure()
|
|
kwargs = {'figure': fig, 'pos': pos}
|
|
plot = draw_networkx_nodes(network, nodelist=network.nodes(), node_color='#ababab', **kwargs)
|
|
draw_networkx_nodes(network, nodelist=path, node_color='#ff0000', **kwargs)
|
|
draw_networkx_edges(network, edgelist=edges, edge_color='#ababab', **kwargs)
|
|
draw_networkx_edges(network, edgelist=path_edges, edge_color='#ff0000', **kwargs)
|
|
draw_networkx_labels(network, labels=labels, font_size=14, **{**kwargs, 'pos': label_pos})
|
|
title(f'Propagating from {source.loc.city} to {destination.loc.city}')
|
|
axis('off')
|
|
show()
|
|
|
|
|
|
def main(network, equipment, source, destination, req = None):
|
|
result_dicts = {}
|
|
network_data = [{
|
|
'network_name' : str(args.filename),
|
|
'source' : source.uid,
|
|
'destination' : destination.uid
|
|
}]
|
|
result_dicts.update({'network': network_data})
|
|
design_data = [{
|
|
'power_mode' : equipment['Spans']['default'].power_mode,
|
|
'span_power_range' : equipment['Spans']['default'].delta_power_range_db,
|
|
'design_pch' : equipment['SI']['default'].power_dbm,
|
|
'baud_rate' : equipment['SI']['default'].baud_rate
|
|
}]
|
|
result_dicts.update({'design': design_data})
|
|
simulation_data = []
|
|
result_dicts.update({'simulation results': simulation_data})
|
|
|
|
power_mode = equipment['Spans']['default'].power_mode
|
|
print('\n'.join([f'Power mode is set to {power_mode}',
|
|
f'=> it can be modified in eqpt_config.json - Spans']))
|
|
|
|
pref_ch_db = lin2db(req.power*1e3) #reference channel power / span (SL=20dB)
|
|
pref_total_db = pref_ch_db + lin2db(req.nb_channel) #reference total power / span (SL=20dB)
|
|
build_network(network, equipment, pref_ch_db, pref_total_db)
|
|
path = compute_constrained_path(network, req)
|
|
|
|
spans = [s.length for s in path if isinstance(s, Fiber)]
|
|
print(f'\nThere are {len(spans)} fiber spans over {sum(spans):.0f}m between {source.uid} and {destination.uid}')
|
|
print(f'\nNow propagating between {source.uid} and {destination.uid}:')
|
|
|
|
try:
|
|
power_range = list(arange(*equipment['SI']['default'].power_range_db))
|
|
last = equipment['SI']['default'].power_range_db[-2]
|
|
if len(power_range) == 0 : #bad input that will lead to no simulation
|
|
power_range = [0] #better than an error message
|
|
else:
|
|
power_range.append(last)
|
|
except TypeError:
|
|
print('invalid power range definition in eqpt_config, should be power_range_db: [lower, upper, step]')
|
|
power_range = [0]
|
|
|
|
for dp_db in power_range:
|
|
req.power = db2lin(pref_ch_db + dp_db)*1e-3
|
|
print(f'\nPropagating with input power = {lin2db(req.power*1e3):.2f}dBm :')
|
|
propagate(path, req, equipment, show=len(power_range)==1)
|
|
print(f'\nTransmission result for input power = {lin2db(req.power*1e3):.2f}dBm :')
|
|
print(destination)
|
|
simulation_data.append({
|
|
'Pch_dBm' : pref_ch_db + dp_db,
|
|
'OSNR_ASE_0.1nm' : round(mean(destination.osnr_ase_01nm),2),
|
|
'OSNR_ASE_signal_bw' : round(mean(destination.osnr_ase),2),
|
|
'SNR_nli_signal_bw' : round(mean(destination.osnr_nli),2),
|
|
'SNR_total_signal_bw' : round(mean(destination.snr),2)
|
|
})
|
|
write_csv(result_dicts, 'simulation_result.csv')
|
|
return path
|
|
|
|
|
|
parser = ArgumentParser()
|
|
parser.add_argument('-e', '--equipment', type=Path,
|
|
default=Path(__file__).parent / 'eqpt_config.json')
|
|
parser.add_argument('-pl', '--plot', action='store_true', default=False)
|
|
parser.add_argument('-v', '--verbose', action='count')
|
|
parser.add_argument('-l', '--list-nodes', action='store_true', default=False, help='list all transceiver nodes')
|
|
parser.add_argument('-po', '--power', default=0, help='channel ref power in dBm')
|
|
#parser.add_argument('-plb', '--power-lower-bound', default=0, help='power sweep lower bound')
|
|
#parser.add_argument('-pub', '--power-upper-bound', default=1, help='power sweep upper bound')
|
|
parser.add_argument('filename', nargs='?', type=Path,
|
|
default=Path(__file__).parent / 'edfa_example_network.json')
|
|
parser.add_argument('source', nargs='?', help='source node')
|
|
parser.add_argument('destination', nargs='?', help='destination node')
|
|
|
|
|
|
if __name__ == '__main__':
|
|
args = parser.parse_args()
|
|
basicConfig(level={0: ERROR, 1: INFO, 2: DEBUG}.get(args.verbose, ERROR))
|
|
|
|
equipment = load_equipment(args.equipment)
|
|
# logger.info(equipment)
|
|
# print(args.filename)
|
|
network = load_network(args.filename, equipment)
|
|
# print(network)
|
|
|
|
transceivers = {n.uid: n for n in network.nodes() if isinstance(n, Transceiver)}
|
|
|
|
if not transceivers:
|
|
exit('Network has no transceivers!')
|
|
if len(transceivers) < 2:
|
|
exit('Network has only one transceiver!')
|
|
|
|
if args.list_nodes:
|
|
for uid in transceivers:
|
|
print(uid)
|
|
exit()
|
|
|
|
if args.source:
|
|
source = transceivers.get(args.source)
|
|
if not source:
|
|
#TODO code a more advanced regex to find nodes match
|
|
nodes_suggestion = [uid for uid in transceivers \
|
|
if args.source.lower() in uid.lower()]
|
|
source = transceivers[nodes_suggestion[0]] \
|
|
if len(nodes_suggestion)>0 else list(transceivers.values())[0]
|
|
print(f'invalid souce node specified,\
|
|
\n{args.source!r}, replaced with {source.uid}')
|
|
del transceivers[source.uid]
|
|
else:
|
|
logger.info('No source node specified: picking random transceiver')
|
|
source = list(transceivers.values())[0]
|
|
|
|
if args.destination:
|
|
destination = transceivers.get(args.destination)
|
|
if not destination:
|
|
nodes_suggestion = [uid for uid in transceivers \
|
|
if args.destination.lower() in uid.lower()]
|
|
destination = transceivers[nodes_suggestion[0]] \
|
|
if len(nodes_suggestion)>0 else list(transceivers.values())[0]
|
|
print(f'invalid destination node specified,\
|
|
\n{args.destination!r}, replaced with {destination.uid}')
|
|
else:
|
|
logger.info('No source node specified: picking random transceiver')
|
|
destination = list(transceivers.values())[1]
|
|
|
|
logger.info(f'source = {args.source!r}')
|
|
logger.info(f'destination = {args.destination!r}')
|
|
|
|
params = {}
|
|
params['request_id'] = 0
|
|
params['trx_type'] = ''
|
|
params['trx_mode'] = ''
|
|
params['source'] = source.uid
|
|
params['destination'] = destination.uid
|
|
params['nodes_list'] = [destination.uid]
|
|
params['loose_list'] = ['strict']
|
|
params['format'] = ''
|
|
trx_params = trx_mode_params(equipment)
|
|
if args.power:
|
|
trx_params['power'] = db2lin(float(args.power))*1e-3
|
|
params.update(trx_params)
|
|
req = Path_request(**params)
|
|
path = main(network, equipment, source, destination, req)
|
|
save_network(args.filename, network)
|
|
|
|
if args.plot:
|
|
plot_results(network, path, source, destination)
|