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https://github.com/Telecominfraproject/oopt-gnpy.git
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55393ca9eb
- tsp fmin is used instead of default SI value Signed-off-by: EstherLerouzic <esther.lerouzic@orange.com>
158 lines
6.5 KiB
Python
Executable File
158 lines
6.5 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
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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 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 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
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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, sink):
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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 {sink.loc.city}')
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axis('off')
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show()
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def main(network, equipment, source, sink, req = None):
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build_network(network, equipment=equipment)
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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 {sink.uid}')
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print(f'\nNow propagating between {source.uid} and {sink.uid}:')
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for p in range(0, 1): #change range to sweep results across several powers in dBm
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req.power = db2lin(p)*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=True)
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print(f'\nTransmission result for input power = {lin2db(req.power*1e3):.2f}dBm :')
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print(sink)
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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('-p', '--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('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('sink', nargs='?', help='sink 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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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 if args.source.lower() in uid.lower()]
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source = transceivers[nodes_suggestion[0]] if len(nodes_suggestion)>0 else transceivers[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.sink:
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try:
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sink = next(transceivers[uid] for uid in transceivers if uid == args.sink)
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except StopIteration as e:
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nodes_suggestion = [uid for uid in transceivers if args.sink.lower() in uid.lower()]
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sink = transceivers[nodes_suggestion[0]] if len(nodes_suggestion)>0 else tansceivers[-1]
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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.sink!r}, replaced with {sink.uid}')
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else:
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logger.info('No source node specified: picking random transceiver')
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sink = list(transceivers.values())[-1]
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logger.info(f'source = {args.source!r}')
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logger.info(f'sink = {args.sink!r}')
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params = {}
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params['request_id'] = 0
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params['source'] = source.uid
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params['destination'] = sink.uid
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params['trx_type'] = 'vendorA_trx-type1'
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params['trx_mode'] = 'PS_SP64_1'
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params['nodes_list'] = [sink.uid]
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params['loose_list'] = ['strict']
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params['spacing'] = 50e9
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params['power'] = 0
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params['nb_channel'] = 97
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params['frequency'] = equipment['Transceiver'][params['trx_type']].frequency
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try:
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extra_params = next(m
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for m in equipment['Transceiver'][params['trx_type']].mode
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if m['format'] == params['trx_mode'])
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except StopIteration :
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msg = f'could not find tsp : {params} with mode: {params} in eqpt library'
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raise ValueError(msg)
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params.update(extra_params)
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req = Path_request(**params)
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path = main(network, equipment, source, sink,req)
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if args.plot:
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plot_results(network, path, source, sink)
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