networkTrafficVoIP

VoIP application traffic pattern generator

expand all in page

Download Required: To use networkTrafficVoIP, first download the Communications Toolbox Wireless Network Simulation Library add-on.

Description

The networkTrafficVoIP object specifies the configuration parameters to generate a voice over Internet protocol (VoIP) application traffic pattern based on the IEEE® 802.11ax™ Evaluation Methodology.

You can use the VoIP application traffic pattern in system-level simulations to model the real-world data traffic.

Creation

Syntax

cfgVoIP = networkTrafficVoIP
cfgVoIP = networkTrafficVoIP(Name=Value)

Description

cfgVoIP = networkTrafficVoIP creates a default VoIP application traffic pattern object.

example

cfgVoIP = networkTrafficVoIP(Name=Value) sets properties using one or more name-value arguments. For example, HasJitter=false specifies that the VoIP application pattern does not model jitter.

Properties

expand all

Mean value for the exponential distribution, specified as a nonnegative integer. The object uses this property to calculate the exponentially distributed active or silent state duration in the VoIP traffic.

Data Types: double

Flag to indicate whether the object models jitter, specified as a logical 1 (true) or 0 (false).

Data Types: logical

Scale parameter for the Laplace distribution, specified as a scalar in the range [1, 100]. The object uses this property and the LaplaceMu property to calculate the packet arrival delay jitter in milliseconds.

Dependencies

To enable this property, set the HasJitter property to true.

Data Types: double

Location parameter for the Laplace distribution, specified as a scalar in the range [0, 100]. The object uses this property and the LaplaceScale property to calculate packet arrival delay jitter in milliseconds.

Dependencies

To enable this property, set the HasJitter property to true.

Data Types: double

Flag to indicate whether the object generates a VoIP packet with payload, specified as a 0 (false) or logical 1 (true).

Data Types: logical

Application data to be added in the VoIP packet, specified as a column vector of integers in the range [0, 255]. If the size of the application data is greater than the packet size, the object truncates the application data. If the size of the application data is less than the packet size, the object appends zeros.

Dependencies

To enable this property, set the GeneratePacket property to 1 (true).

Data Types: double

Object Functions

expand all

generateGenerate next FTP, On-Off, VoIP, or video conference application traffic packet

Examples

collapse all

This example uses:

Open Live Script

Create a default VoIP application traffic pattern object.

cfgVoIP = networkTrafficVoIP;

Generate a VoIP application traffic pattern.

[dt,packetSize] = generate(cfgVoIP);

This example uses:

Open Live Script

Create a VoIP application traffic pattern object, specifying the mean value of the exponential distribution.

cfgVoIP = networkTrafficVoIP(ExponentialMean=5);

Generate a VoIP application traffic pattern.

[dt,packetSize] = generate(cfgVoIP);

This example uses:

Open Live Script

Create a VoIP application traffic pattern object to generate a VoIP data packet.

cfgVoIP = networkTrafficVoIP('GeneratePacket',true);

Generate a VoIP application traffic pattern and data packet.

[dt,packetSize,packet] = generate(cfgVoIP);

This example uses:

Open Live Script

Create a default VoIP application traffic pattern object.

cfgVoIP = networkTrafficVoIP;

Generate a VoIP application traffic pattern with 200 VoIP packets.

numPkts = 200;
dt = zeros(1,numPkts);
packetSize = zeros(1,numPkts);
for packetCount = 1:numPkts
    [dt(packetCount),packetSize(packetCount)] = generate(cfgVoIP);
end

Visualize the VoIP packet sizes.

stem(packetSize);
title('Packet Size Versus Packet Number');
xlabel('Packet Number');
ylabel('Packet Size in Bytes');

Figure contains an axes object. The axes object with title Packet Size Versus Packet Number, xlabel Packet Number, ylabel Packet Size in Bytes contains an object of type stem.

Visualize the VoIP packet intervals.

figure;
stem(dt);
title('dt Versus Packet Number');
xlabel('Packet Number');
ylabel('dt in Milliseconds');

Figure contains an axes object. The axes object with title dt Versus Packet Number, xlabel Packet Number, ylabel dt in Milliseconds contains an object of type stem.

References

[1] IEEE 802.11™-14/0571r12. "11ax Evaluation Methodology." IEEE P802.11. Wireless LANs. https://www.ieee.org.

Extended Capabilities

expand all

C/C++ Code Generation
Generate C and C++ code using MATLAB® Coder™.

Version History

Introduced in R2020b

expand all

See Also

Objects