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https://github.com/Telecominfraproject/oopt-gnpy.git
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1437b6010e
code cleanning consistency wiht path request generator bug fix select_edfa readibility enhancement set roadm_loss before design in power mode Signed-off-by: Jean-Luc Auge <jeanluc.auge@orange.com>
172 lines
7.4 KiB
Python
Executable File
172 lines
7.4 KiB
Python
Executable File
#!/usr/bin/env python3
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'''
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Transmission setup example:
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reads from network json (default = examples/edfa/edfa_example_network.json)
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propagates a 96 channels comb
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'''
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from gnpy.core.equipment import load_equipment, trx_mode_params
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from gnpy.core.utils import db2lin, lin2db
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from argparse import ArgumentParser
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from sys import exit
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from pathlib import Path
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from json import loads
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from collections import Counter
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from logging import getLogger, basicConfig, INFO, ERROR, DEBUG
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from numpy import arange
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from matplotlib.pyplot import show, axis, figure, title
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from networkx import (draw_networkx_nodes, draw_networkx_edges,
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draw_networkx_labels, dijkstra_path)
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from gnpy.core.network import load_network, build_network
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from gnpy.core.elements import Transceiver, Fiber, Edfa, Roadm
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from gnpy.core.info import create_input_spectral_information, SpectralInformation, Channel, Power, Pref
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from gnpy.core.request import Path_request, RequestParams, compute_constrained_path, propagate
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logger = getLogger(__name__)
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def plot_results(network, path, source, destination):
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path_edges = set(zip(path[:-1], path[1:]))
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edges = set(network.edges()) - path_edges
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pos = {n: (n.lng, n.lat) for n in network.nodes()}
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labels = {n: n.location.city for n in network.nodes() if isinstance(n, Transceiver)}
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city_labels = set(labels.values())
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for n in network.nodes():
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if n.location.city and n.location.city not in city_labels:
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labels[n] = n.location.city
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city_labels.add(n.location.city)
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label_pos = pos
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fig = figure()
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kwargs = {'figure': fig, 'pos': pos}
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plot = draw_networkx_nodes(network, nodelist=network.nodes(), node_color='#ababab', **kwargs)
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draw_networkx_nodes(network, nodelist=path, node_color='#ff0000', **kwargs)
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draw_networkx_edges(network, edgelist=edges, edge_color='#ababab', **kwargs)
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draw_networkx_edges(network, edgelist=path_edges, edge_color='#ff0000', **kwargs)
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draw_networkx_labels(network, labels=labels, font_size=14, **{**kwargs, 'pos': label_pos})
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title(f'Propagating from {source.loc.city} to {destination.loc.city}')
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axis('off')
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show()
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def main(network, equipment, source, destination, req = None):
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power_mode = equipment['Spans']['default'].power_mode
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print('\n'.join([f'Power mode is set to {power_mode}',
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f'=> it can be modified in eqpt_config.json - Spans']))
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pref_ch_db = lin2db(req.power*1e3) #reference channel power / span (SL=20dB)
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pref_total_db = pref_ch_db + lin2db(req.nb_channel) #reference total power / span (SL=20dB)
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build_network(network, equipment, pref_ch_db, pref_total_db)
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path = compute_constrained_path(network, req)
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spans = [s.length for s in path if isinstance(s, Fiber)]
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print(f'\nThere are {len(spans)} fiber spans over {sum(spans):.0f}m between {source.uid} and {destination.uid}')
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print(f'\nNow propagating between {source.uid} and {destination.uid}:')
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try:
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power_range = arange(*equipment['SI']['default'].power_range_db)
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if len(power_range) == 0 : #bad input that will lead to no simulation
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power_range = [0] #better than an error message
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except TypeError:
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print('invalid power range definition in eqpt_config, should be power_range_db: [lower, upper, step]')
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power_range = [0]
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for dp_db in power_range:
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req.power = db2lin(pref_ch_db + dp_db)*1e-3
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print(f'\nPropagating with input power = {lin2db(req.power*1e3):.2f}dBm :')
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propagate(path, req, equipment, show=len(power_range)==1)
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print(f'\nTransmission result for input power = {lin2db(req.power*1e3):.2f}dBm :')
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print(destination)
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return path
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parser = ArgumentParser()
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parser.add_argument('-e', '--equipment', type=Path,
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default=Path(__file__).parent / 'eqpt_config.json')
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parser.add_argument('-pl', '--plot', action='store_true', default=False)
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parser.add_argument('-v', '--verbose', action='count')
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parser.add_argument('-l', '--list-nodes', action='store_true', default=False, help='list all transceiver nodes')
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parser.add_argument('-po', '--power', default=0, help='channel ref power in dBm')
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#parser.add_argument('-plb', '--power-lower-bound', default=0, help='power sweep lower bound')
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#parser.add_argument('-pub', '--power-upper-bound', default=1, help='power sweep upper bound')
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parser.add_argument('filename', nargs='?', type=Path,
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default=Path(__file__).parent / 'edfa_example_network.json')
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parser.add_argument('source', nargs='?', help='source node')
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parser.add_argument('destination', nargs='?', help='destination node')
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if __name__ == '__main__':
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args = parser.parse_args()
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basicConfig(level={0: ERROR, 1: INFO, 2: DEBUG}.get(args.verbose, ERROR))
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equipment = load_equipment(args.equipment)
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# logger.info(equipment)
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# print(args.filename)
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network = load_network(args.filename, equipment)
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# print(network)
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transceivers = {n.uid: n for n in network.nodes() if isinstance(n, Transceiver)}
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if not transceivers:
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exit('Network has no transceivers!')
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if len(transceivers) < 2:
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exit('Network has only one transceiver!')
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if args.list_nodes:
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for uid in transceivers:
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print(uid)
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exit()
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if args.source:
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try:
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source = next(transceivers[uid] for uid in transceivers if uid == args.source)
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except StopIteration as e:
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#TODO code a more advanced regex to find nodes match
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nodes_suggestion = [uid for uid in transceivers \
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if args.source.lower() in uid.lower()]
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source = transceivers[nodes_suggestion[0]] \
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if len(nodes_suggestion)>0 else list(transceivers.values())[0]
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print(f'invalid souce node specified, did you mean:\
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\n{nodes_suggestion}?\
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\n{args.source!r}, replaced with {source.uid}')
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del transceivers[source.uid]
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else:
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logger.info('No source node specified: picking random transceiver')
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source = list(transceivers.values())[0]
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if args.destination:
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try:
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destination = next(transceivers[uid] for uid in transceivers if uid == args.destination)
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except StopIteration as e:
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nodes_suggestion = [uid for uid in transceivers \
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if args.destination.lower() in uid.lower()]
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destination = transceivers[nodes_suggestion[0]] \
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if len(nodes_suggestion)>0 else list(transceivers.values())[0]
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print(f'invalid destination node specified, did you mean:\
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\n{nodes_suggestion}?\
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\n{args.destination!r}, replaced with {destination.uid}')
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else:
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logger.info('No source node specified: picking random transceiver')
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destination = list(transceivers.values())[1]
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logger.info(f'source = {args.source!r}')
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logger.info(f'destination = {args.destination!r}')
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params = {}
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params['request_id'] = 0
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params['trx_type'] = ''
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params['trx_mode'] = ''
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params['source'] = source.uid
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params['destination'] = destination.uid
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params['nodes_list'] = [destination.uid]
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params['loose_list'] = ['strict']
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params['format'] = ''
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trx_params = trx_mode_params(equipment)
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if args.power:
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trx_params['power'] = db2lin(float(args.power))*1e-3
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params.update(trx_params)
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req = Path_request(**params)
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path = main(network, equipment, source, destination, req)
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if args.plot:
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plot_results(network, path, source, destination)
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