A CBR object is embodied in the OTcl class
Application/Traffic/CBR. The member variables that parameterize this
object are:
rX
rate
_ & the sending rate
interval
_ & (Optional) interval between packets
packetSize
_ & the constant size of the packets generated
random
_ & flag indicating whether or not to introduce random ``noise''
in the scheduled departure times (default is off)
maxpkts
_ & the maximum number of packets to send (default is (
)
Hence a new CBR traffic generator can be created and parameterized
as follows:
set e [new Application/Traffic/CBR]
$e set packetSize_ 48
$e set rate_ 64Kb
$e set random_ 1
The setting of a CBR object's rate_ and interval_ are mutually
exclusive (the interval between packets is maintained as an interval
variable in C++,
and some example ns scripts specify an interval rather than a rate). In
a simulation, either a rate or an interval (but not both) should be
specified for a CBR object.
Tom Henderson
2011-11-05