| [1928] | 1 | # experiment met een genetisch algoritme voor de kanalenplanning
|
|---|
| 2 | # het genetische zit er nu nauwelijks in, en wat er in zit is ongetwijfeld
|
|---|
| 3 | # fout. wat er wel goed in zit is het parseren van de bestaande situatie en
|
|---|
| 4 | # het scoren van (nu random) configuraties.
|
|---|
| 5 |
|
|---|
| 6 | # de score functie is nu redelijk simplistisch:
|
|---|
| 7 | # - de score van een combinatie van twee interfaces op een node is 1 als er
|
|---|
| 8 | # twee of meer kanalen tussen zitten, en -1 als dat niet zo is
|
|---|
| 9 | # - de score van een node is de som van de scores van alle combinaties van
|
|---|
| 10 | # interfaces van die node, maal het aantal interfaces. dat laatste omdat
|
|---|
| 11 | # een positieve score hebben knapper is met meer interfaces dan met minder,
|
|---|
| 12 | # dus dat moet beloond. een negatieve score is erger met meer interfaces
|
|---|
| 13 | # (belangrijker node, waarschijnlijk) dan met minder, dus dat moet
|
|---|
| 14 | # bestraft.
|
|---|
| 15 | # - de totale score is de som van de scores van de nodes
|
|---|
| 16 | #
|
|---|
| 17 | # het stukje "genetisch" aan het einde is afgeraffeld. mutation en
|
|---|
| 18 | # recombination gebeuren op de oplossing zelf ipv op een bitstring
|
|---|
| 19 | # representatie. selection is dom en neemt gewoon de helft beste oplossingen.
|
|---|
| 20 | import re
|
|---|
| 21 | import random
|
|---|
| [1929] | 22 | import os
|
|---|
| [1928] | 23 |
|
|---|
| 24 | # deze twee zijn nodig voor de evaluatie van een configuratie
|
|---|
| [1935] | 25 | nodes = {} # nodename -> Node
|
|---|
| 26 | groups = {} # essid -> WIGroup
|
|---|
| [1928] | 27 |
|
|---|
| 28 | population = []
|
|---|
| 29 |
|
|---|
| 30 | # gegeven een lijst, geef de lijst zonder dubbele elementen
|
|---|
| 31 | def uniq(l):
|
|---|
| 32 | d = {}
|
|---|
| 33 | for e in l:
|
|---|
| 34 | d[e] = 1
|
|---|
| 35 | return d.keys()
|
|---|
| 36 |
|
|---|
| [1935] | 37 | def multiget(d, ks):
|
|---|
| 38 | return map(lambda k: d[k], ks)
|
|---|
| 39 |
|
|---|
| [1928] | 40 | class Node:
|
|---|
| 41 | def __init__(self, name, wis):
|
|---|
| 42 | self.name = name
|
|---|
| 43 | self.wis = wis
|
|---|
| 44 | for wi in wis:
|
|---|
| 45 | wi.setNode(self)
|
|---|
| 46 | def wi_byname(self, name):
|
|---|
| 47 | wi = filter(lambda wi: wi.name == name, self.wis)
|
|---|
| 48 | assert len(wi) == 1
|
|---|
| 49 | return wi[0]
|
|---|
| 50 | def score(self):
|
|---|
| 51 | score = 0
|
|---|
| 52 | for i in range(len(self.wis)):
|
|---|
| 53 | wi_i = self.wis[i]
|
|---|
| 54 | if wi_i.group == None:
|
|---|
| 55 | # orphaned interface
|
|---|
| 56 | continue
|
|---|
| 57 | if wi_i.group.channel == None:
|
|---|
| 58 | print "huh?"
|
|---|
| 59 | for j in range(len(self.wis)):
|
|---|
| 60 | if i != j:
|
|---|
| 61 | wi_j = self.wis[j]
|
|---|
| 62 | if wi_j.group == None:
|
|---|
| 63 | continue
|
|---|
| 64 | diff = abs(wi_i.group.channel - wi_j.group.channel)
|
|---|
| 65 | if diff > 2:
|
|---|
| 66 | score = score + 1
|
|---|
| 67 | else:
|
|---|
| 68 | score = score - 1
|
|---|
| 69 | score = score * len(self.wis)
|
|---|
| 70 | return score
|
|---|
| 71 |
|
|---|
| 72 | class WI:
|
|---|
| 73 | def __init__(self, name):
|
|---|
| 74 | self.name = name
|
|---|
| 75 | self.node = None
|
|---|
| 76 | self.group = None
|
|---|
| 77 | self.omni = 0
|
|---|
| 78 | def setNode(self, node):
|
|---|
| 79 | self.node = node
|
|---|
| 80 | def setGroup(self, group):
|
|---|
| 81 | self.group = group
|
|---|
| 82 |
|
|---|
| 83 | class WIGroup:
|
|---|
| 84 | def __init__(self, name):
|
|---|
| 85 | self.name = name
|
|---|
| 86 | self.wis = []
|
|---|
| 87 | self.channel = None
|
|---|
| 88 | def add_wi(self, wi):
|
|---|
| 89 | self.wis.append(wi)
|
|---|
| 90 | wi.setGroup(self)
|
|---|
| [1935] | 91 | def uniq(self):
|
|---|
| 92 | self.wis = uniq(self.wis)
|
|---|
| [1928] | 93 |
|
|---|
| 94 | class Configuration:
|
|---|
| 95 | def __init__(self):
|
|---|
| 96 | self.conf = None
|
|---|
| 97 | self.calculated_score = None
|
|---|
| 98 | def copy(self):
|
|---|
| 99 | c = Configuration()
|
|---|
| [1935] | 100 | c.conf = self.conf.copy()
|
|---|
| [1928] | 101 | c.calculated_score = None
|
|---|
| 102 | return c
|
|---|
| 103 | def randomize(self):
|
|---|
| [1935] | 104 | self.conf = {}
|
|---|
| 105 | for essid in groups.keys():
|
|---|
| 106 | self.conf[essid] = random.randint(1, 13)
|
|---|
| [1928] | 107 | self.calculated_score = None
|
|---|
| 108 | def score(self):
|
|---|
| 109 | assert len(self.conf) == len(groups)
|
|---|
| 110 | if self.calculated_score != None:
|
|---|
| 111 | return self.calculated_score
|
|---|
| [1935] | 112 | for essid in groups.keys():
|
|---|
| 113 | groups[essid].channel = self.conf[essid]
|
|---|
| [1928] | 114 | score = 0
|
|---|
| 115 | for node in nodes.values():
|
|---|
| 116 | score = score + node.score()
|
|---|
| 117 | self.calculated_score = score
|
|---|
| 118 | return score
|
|---|
| 119 | def mutate(self, rate):
|
|---|
| [1935] | 120 | for essid in groups.keys():
|
|---|
| [1928] | 121 | if random.random() <= rate:
|
|---|
| [1935] | 122 | self.conf[essid] = random.randint(1, 13)
|
|---|
| [1928] | 123 | def crossover(self, partner, numpoints):
|
|---|
| 124 | # pick the crossover points
|
|---|
| [1935] | 125 | essids = groups.keys()
|
|---|
| 126 | points = [random.randint(0, len(essids) - 1) for i in range(numpoints)]
|
|---|
| [1928] | 127 | points.sort()
|
|---|
| 128 | conf = []
|
|---|
| 129 | who = 0
|
|---|
| 130 | lastpoint = 0
|
|---|
| 131 | while len(points):
|
|---|
| 132 | point = points.pop(0)
|
|---|
| 133 | if who == 0:
|
|---|
| 134 | l = self.conf[lastpoint:point]
|
|---|
| 135 | else:
|
|---|
| 136 | l = partner.conf[lastpoint:point]
|
|---|
| [1935] | 137 | who = 1 - who
|
|---|
| [1928] | 138 | conf.extend(l)
|
|---|
| 139 | lastpoint = point
|
|---|
| 140 | if who == 0:
|
|---|
| 141 | l = self.conf[lastpoint:]
|
|---|
| 142 | else:
|
|---|
| 143 | l = partner.conf[lastpoint:]
|
|---|
| 144 | conf.extend(l)
|
|---|
| 145 | assert len(conf) == len(groups)
|
|---|
| 146 | self.conf = conf
|
|---|
| 147 |
|
|---|
| 148 |
|
|---|
| 149 | # BEGIN UGLY PARSING CODE
|
|---|
| 150 |
|
|---|
| [1935] | 151 | to_resolve = [] # list of (essid, WI) tuples
|
|---|
| [1928] | 152 |
|
|---|
| 153 | def parse_wleiden_conf(lines):
|
|---|
| [1935] | 154 | essid = None
|
|---|
| [1928] | 155 | wi = None
|
|---|
| [1935] | 156 | wis = []
|
|---|
| [1928] | 157 | for l in lines:
|
|---|
| 158 | if wi != None:
|
|---|
| [1935] | 159 | match = re.match("^MODE=master.*", l)
|
|---|
| [1928] | 160 | if match != None:
|
|---|
| [1935] | 161 | master = 1
|
|---|
| 162 | match = re.match("^ESSID=(.*)", l)
|
|---|
| [1928] | 163 | if match != None:
|
|---|
| [1935] | 164 | essid = match.group(1)
|
|---|
| 165 | match = re.match("^EW[0-9]*", l)
|
|---|
| [1928] | 166 | if match != None:
|
|---|
| [1935] | 167 | if master == 1:
|
|---|
| 168 | group = WIGroup(essid)
|
|---|
| 169 | groups[essid] = group
|
|---|
| 170 | group.add_wi(wi)
|
|---|
| 171 | else:
|
|---|
| 172 | # defer, may come way later
|
|---|
| 173 | to_resolve.append( (essid, wi) )
|
|---|
| 174 | master = 0
|
|---|
| 175 | wi = None
|
|---|
| 176 | essid = None
|
|---|
| [1928] | 177 | else:
|
|---|
| 178 | match = re.match("^\$nodename='([^']*)';.*", l)
|
|---|
| 179 | if match != None:
|
|---|
| 180 | nodename = match.group(1).lower()
|
|---|
| [1935] | 181 | match = re.match("^\$config{'wi[0-9]*:[0-9].*", l)
|
|---|
| 182 | if match != None:
|
|---|
| 183 | continue
|
|---|
| [1928] | 184 | match = re.match("^\$config{'(wi[0-9]*).*", l)
|
|---|
| 185 | if match != None:
|
|---|
| [1935] | 186 | wi = WI(match.group(1))
|
|---|
| 187 | wis.append(wi)
|
|---|
| 188 | master = 0
|
|---|
| 189 | node = Node(nodename, wis)
|
|---|
| 190 | nodes[nodename] = node
|
|---|
| [1928] | 191 |
|
|---|
| 192 | # gegeven een file met filenames van wleiden.conf's, parseer ze allemaal en
|
|---|
| 193 | # vul de datastructuren
|
|---|
| 194 | def parse_metafile(filename):
|
|---|
| 195 | for fname in open(filename).readlines():
|
|---|
| 196 | parse_wleiden_conf(open(fname[:-1]).readlines())
|
|---|
| [1935] | 197 | for essid, wi in to_resolve:
|
|---|
| 198 | if not groups.has_key(essid):
|
|---|
| 199 | print "Warning: node %s, %s refers to unknown essid %s" % (wi.node.name, wi.name, essid)
|
|---|
| 200 | continue
|
|---|
| 201 | groups[essid].add_wi(wi)
|
|---|
| 202 | for group in groups.values():
|
|---|
| 203 | group.uniq()
|
|---|
| [1928] | 204 |
|
|---|
| 205 | # END UGLY PARSING CODE
|
|---|
| 206 |
|
|---|
| [1929] | 207 | def plot_configuration(conf, out):
|
|---|
| 208 | out.write("digraph plot {\n")
|
|---|
| [1935] | 209 | for essid in groups:
|
|---|
| 210 | out.write("\"%s\" [label=\"%s\\n(%d)\"]\n" % (essid, essid, groups[essid].channel))
|
|---|
| [1929] | 211 | for nodename in nodes.keys():
|
|---|
| 212 | for wi in nodes[nodename].wis:
|
|---|
| 213 | if wi.group == None:
|
|---|
| 214 | continue
|
|---|
| [1935] | 215 | out.write("\"%s\" -> \"%s\"\n" % (nodename, wi.group.name))
|
|---|
| [1929] | 216 | out.write("}")
|
|---|
| 217 |
|
|---|
| [1928] | 218 | parse_metafile('l')
|
|---|
| 219 |
|
|---|
| [1935] | 220 | for essid in groups.keys():
|
|---|
| 221 | print essid, map(lambda wi: wi.node.name, groups[essid].wis)
|
|---|
| 222 |
|
|---|
| [1928] | 223 | for i in range(20):
|
|---|
| 224 | conf = Configuration()
|
|---|
| 225 | conf.randomize()
|
|---|
| 226 | population.append(conf)
|
|---|
| 227 |
|
|---|
| [1929] | 228 | for iteration in range(1000):
|
|---|
| 229 | for i in range(0, 9):
|
|---|
| [1928] | 230 | p = population[i].copy()
|
|---|
| [1935] | 231 | #population[i].crossover(population[i + 10], random.randint(1, 4) * 2)
|
|---|
| [1928] | 232 | population[i + 10] = p
|
|---|
| [1929] | 233 | population[i + 10].mutate(0.05)
|
|---|
| [1928] | 234 | population.sort(lambda a, b: cmp(b.score(), a.score()))
|
|---|
| [1935] | 235 | print population[0].score(), map(lambda g: g.channel, groups.values())
|
|---|
| [1929] | 236 | plot_configuration(population[0].conf, open("foo.dot", 'w'))
|
|---|
| 237 | os.system('neato -Gstart=foo -Goverlap=false/scale -Gsplines=true -Gsep=2 -Gratio=fill -Gnslimit=50.0 -Grotate=90 -Gsize="11,7.5" -Tps -o channelga.ps foo.dot')
|
|---|
| 238 |
|
|---|
