def dot11rts(self, *args, **kwargs):
"""Overloaded to add 'phy-rate' annotation to new packet."""
rargs = {}
for s in ['rate', 'length']:
if s in kwargs:
rargs[s] = kwargs[s]
del kwargs[s]
# create RTS + RAI payload
p = DCF.dot11rts(self, *args, **kwargs)/RAI(**rargs)
p.setanno('phy-rate', self.base)
return p
