Constant bit rate is abbreviated as CBR and it is considered as the quality of service that is deployed in the process of codecs and it includes the depiction of the conversion of analog signals to digital signals. Let’s take a look into the utilization and benefits of Cbr in the following.
Benefits of Cbr
- Provision of high quality service
- Assurance for QoS
- Assistive for timing sensitive traffic
- Offers low latency traffic
Consequently, traffic generation is one of the main objectives of Cbr and it is due to the deterministic rate and the packets are functioning in the constant size and some of them are in random size with the inter packet departure intervals.
Cbr Traffic Generator in Ns2
Cbr traffic generator is created and parameterized through the following commands
set e [new Application/Traffic/CBR]
$e set packetSize_ 48
$e set rate_ 64Kb
$e set random_ 1
Required parameters for the object are listed below
Above we have highlighted the significance about Cbr and now for your reference, we have highlighted the process based on Cbr rownode to mover through the code. For the firstly, we have to create a UDP agent and application based on Cbr to set a connection from rownode towards mover.
# setup UDP connection, using CBR trafficAs the matter of fact,
set udp [new Agent/UDP]
set null [new Agent/Null]
$ns attach-agent $rownode(0) $udp
$ns attach-agent $mover $null
$ns connect $udp $null
set cbr1 [new Application/Traffic/CBR]
$cbr1 set packetSize_ 512
$cbr1 set rate_ 200kb
$cbr1 attach-agent $udp
$ns at 0 "$cbr1 start"
$ns at $opt(finish) "$cbr1 stop"
Creation of Random Traffic Patterns Using Cbr
The random traffic connections based CBR is capable to set the mobile nodes through the utilization of traffic scenario generator script. Additionally, the traffic generator script is accessible through ~ns/indep-utils/cmu-scen-gen and it is denoted as cbrgen.tcl. The types of traffic connections in Cbr have to be defined for the creation of traffic connection file. The system is functioning using the below mentioned command.
ns cbrgen.tcl [-type cbr|tcp] [-nn nodes] [-seed seed] [-mc connections] [-rate rate]
To this end, we hope that we have provided the appropriate research requirements and processes to implement Cbr in Ns2. If you guys face any issues while implementing your own, you can contact us and our research professionals will clarify your disputes.