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networkTrafficVideoConference

视频会议应用程序流量模式情况ator

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    Description

    ThenetworkTrafficVideoConferenceobject specifies the configuration parameters to generate a video conference application traffic pattern based on the IEEE®802.11ax™ Evaluation Methodology.

    You can use the video conference application traffic pattern in5G and WLAN (requires WLAN Toolbox™)system-level simulations to accurately model real-world data traffic.

    Creation

    Syntax

    cfgVideo = networkTrafficVideoConference
    cfgVideo = networkTrafficVideoConference(Name,Value)

    Description

    example

    cfgVideo= networkTrafficVideoConferencecreates a default video application traffic pattern object.

    example

    cfgVideo= networkTrafficVideoConference(Name,Value)setsPropertiesusing one or more name-value pair arguments. Enclose each property name in quotes. For example,'HasJitter',falsespecifies that the video application pattern does not model jitter.

    Properties

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    Time interval between two consecutive video frames, specified as a positive integer. This value is expressed in milliseconds.

    Data Types:double

    Option to set source for video frame size, specified as one of these values.

    • 'WeibullDistribution'— Use the video frame size value calculated by the Weibull probability distribution function.

    • 'FixedSize'— Use the video frame size value specified by theFixedFrameSizeproperty.

    Data Types:char|string

    Size of the video frame, specified as an integer in the range [1, 15,000]. This value is expressed in bytes. The video frame can be segmented into multiple network packets based on this value.

    Dependencies

    To enable this property, set theFrameSizeMethodproperty to'FixedSize'.

    Data Types:double

    尺度参数威布尔分布的calculate the video frame size, specified as a scalar in the range (0, 54,210].

    Dependencies

    To enable this property, set theFrameSizeMethodproperty to'WeibullDistribution'.

    Data Types:double

    Shape parameter for the Weibull distribution to calculate the video frame size, specified as a scalar in the range (0, 1].

    Dependencies

    To enable this property, set theFrameSizeMethodproperty to'WeibullDistribution'.

    Data Types:double

    Flag to indicate whether to model network jitter, specified as alogical1(true) or0(false). The object applies jitter between the segmented packets. If you set this property to1(true), the object models jitter using the Gamma probability distribution function.

    Data Types:logical

    Shape parameter for the Gamma distribution to calculate network jitter, specified as a scalar in the range (0, 5].

    Dependencies

    To enable this property, set theHasJitterproperty to1(true).

    Data Types:double

    Scale parameter for the Gamma distribution to calculate network jitter, specified as a scalar in the range (0, 10].

    Dependencies

    To enable this property, set theHasJitterproperty to1(true).

    Data Types:double

    Protocol overheads in network traffic, specified as an integer in the range [0, 60]. To add layer 3, layer 4, and application protocol overheads in network traffic, enable this property. This value is expressed in bytes.

    Data Types:double

    Flag to indicate whether to generate a video packet with payload, specified as alogical1(true) or0(false). To generate a video packet with payload, set this property to1(true). If you set this property to0(false), thegenerateobject function generates no application data packet.

    Data Types:logical

    Application data to be added in the video 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 theGeneratePacketproperty to1(true).

    Data Types:double

    Object Functions

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

    Examples

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    Open Live Script

    Create a default video application traffic pattern object.

    cfgVideo = networkTrafficVideoConference
    cfgVideo = networkTrafficVideoConference with properties: FrameInterval: 40 FrameSizeMethod: 'WeibullDistribution' WeibullScale: 6950 WeibullShape: 0.8099 HasJitter: 0 ProtocolOverhead: 28 GeneratePacket: 0 Read-only properties: No properties.

    Generate a video application traffic pattern.

    [dt,packetSize] = generate(cfgVideo);
    Open Live Script

    Create a video application traffic pattern object to generate a video data packet. Specify the frame interval in milliseconds.

    cfgVideo = networkTrafficVideoConference('GeneratePacket',true); cfgVideo.FrameInterval = 60;

    Generate a video application traffic pattern and data packet.

    [dt,packetSize,packet] = generate(cfgVideo);
    Open Live Script

    Create a video application traffic pattern object to generate a video frame of size 400 bytes.

    cfgVideo = networkTrafficVideoConference('FrameSizeMethod','FixedSize','FixedFrameSize',400);

    Specify the elapsed time in milliseconds.

    elapsedTime = 10;

    After every elapsed time value, invoke the video application traffic pattern object to generate five video data packets.

    fori = 1:5whiletrue [dt,packetSize] = generate(cfgVideo,elapsedTime);ifpacketSize fprintf('Video data packet %d generated\n',i);break;endendend
    Video data packet 1 generated Video data packet 2 generated Video data packet 3 generated Video data packet 4 generated Video data packet 5 generated
    Open Live Script

    Create a default video application traffic pattern object.

    cfgVideo = networkTrafficVideoConference;

    Generate a video application traffic pattern with 100 video packets.

    forpacketCount = 1:100 [dt(packetCount),packetSize(packetCount)] = generate(cfgVideo);end

    Visualize the video 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 contains an object of type stem.

    Visualize the video 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 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

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

    Version History

    Introduced in R2021a

    See Also

    Objects