def autoAssociation(cls, stations, aps):
"""
This is useful to make the users' life easier
:param stations: list of stations
:param aps: list of access points
"""
nodes = stations + aps
for node in nodes:
for wlan in range(0, len(node.params['wlan'])):
if node.type == 'vehicle' and wlan == 1:
node = node.params['carsta']
wlan = 0
ap = []
for node in aps:
if 'link' in node.params:
ap.append(node)
nodes = stations + ap
if cls.nroads == 0:
for node in nodes:
if 'position' in node.params and 'link' not in node.params:
mobility.aps = aps
mobility.parameters_(node)
for sta in stations:
for wlan in range(0, len(sta.params['wlan'])):
for ap in aps:
if 'position' in sta.params and 'position' in ap.params:
dist = wirelessLink.getDistance(sta, ap)
if dist <= ap.params['range'][0]:
mobility.handover(sta, ap, wlan)
def customAssociationControl(self, sta, ap, wlan, ac):
"""Mechanisms that optimize the use of the APs
llf: Least-loaded-first
ssf: Strongest-signal-first"""
if ac == "llf":
apref = sta.params['associatedTo'][wlan]
if apref != '':
ref_llf = len(apref.params['associatedStations'])
if len(ap.params['associatedStations']) + 2 < ref_llf:
debug('iw dev %s disconnect' % sta.params['wlan'][wlan])
sta.pexec('iw dev %s disconnect' % sta.params['wlan'][wlan])
self.changeAP = True
else:
self.changeAP = True
elif ac == "ssf":
distance = wirelessLink.getDistance(sta, sta.params['associatedTo'][wlan])
RSSI = wirelessLink.setRSSI(sta, sta.params['associatedTo'][wlan], wlan, distance)
refDistance = wirelessLink.getDistance(sta, ap)
refRSSI = wirelessLink.setRSSI(sta, ap, wlan, refDistance)
if float(refRSSI) > float(RSSI + 0.1):
debug('iw dev %s disconnect' % sta.params['wlan'][wlan])
sta.pexec('iw dev %s disconnect' % sta.params['wlan'][wlan])
self.changeAP = True
return self.changeAP
def getDistance(cls, src, dst):
"Get the distance between two nodes"
dist = wirelessLink.getDistance(src, dst)
return dist
def getDistance(self, src, dst):
dist = wirelessLink.getDistance(src, dst)
return dist