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Last updated: 2022-06-22 15:18:24

    It is difficult for ordinary users to measure network quality. Before calls are made, we recommend that you test the network speed to get more accurate results on network quality.

    Notes

    • To ensure call quality, do not run the test during a video call.
    • Speed testing consumes traffic and consequently generates a small traffic fee (almost negligible).

    Supported Platforms

    iOS Android macOS Windows Electron Web
    ✓ (Reference: Guide for Web)

    How Speed Testing Works

    • During speed testing, the SDK sends a batch of probe packets to the server node, measures the quality of return packets, and returns the testing result via a callback API.
    • The testing result can be used to optimize the SDK's server selection policy, so you are advised to run the test before the first call, which will help the SDK select the optimal server. If the result is unsatisfactory, you can show a UI message asking users to change to a better network.
    • The test result (TRTCSpeedTestResult) includes the following parameters:
      ParameterTypeDescription
      success Success result Whether the test is successful.
      errMsg Error message Error message of bandwidth test.
      ip Server address Testing server IP
      quality Network quality score Network quality measured by the SDK. Lower packet loss and shorter RTT result in a higher network quality score.
      upLostRate Upstream packet loss rate Value range: 0-1.0. `0.3` indicates that for every 10 data packets sent to the server, 3 may be lost.
      downLostRate Downstream packet loss rate Value range: 0-1.0. `0.2` indicates that for every 10 data packets received from the server, 2 may be lost.
      rtt Latency The time it takes for data to travel from the SDK to the server and back again. The shorter the RTT, the better. The normal range of RTT is 10-100 ms.
      availableUpBandwidth Upstream bandwidth Estimated upstream bandwidth in Kbps. -1 indicates an invalid value.
      availableDownBandwidth Downstream bandwidth Estimated downstream bandwidth in Kbps. -1 indicates an invalid value.

    How to Test Speed

    The speed test feature can be started through the startSpeedTest function of TRTCCloud. The speed test result will be called back through the callback function.

    // Sample code for starting speed testing. `sdkAppId` and `UserSig` are required. For how to get them, see Basic Features.
    // The example below starts after login.
    - (void)onLogin:(NSString *)userId userSig:(NSString *)userSid
    {
    TRTCSpeedTestParams *params;
    // `sdkAppID` is the actual application ID obtained from the console.
    params.sdkAppID = sdkAppId;
    params.userID = userId;
    params.userSig = userSig;
    // Expected upstream bandwidth in Kbps. Value range: 10–5000. 0 indicates not to test
    params.expectedUpBandwidth = 5000;
    // Expected downstream bandwidth in Kbps. Value range: 10–5000. 0 indicates not to test
    params.expectedDownBandwidth = 5000;
    [trtcCloud startSpeedTest:params];
    }
    - (void)onSpeedTestResult:(TRTCSpeedTestResult *)result {
    // The speed test result will be called back after the test is completed
    }

    Speed Test Tool

    If you don't want to call an API to test the network speed, you can use the network speed test tool for PC provided by TRTC to quickly get the network quality details.

    MacWindows

    Test metrics

    Metric Description
    WiFi Quality Wi-Fi signal reception quality
    DNS RTT Tencent Cloud testing domain DNS round-trip time (RTT)
    MTR MTR is a network speed test tool, which can detect the packet loss rate and latency between client and TRTC node and display the details of each hop in the route
    UDP Loss UDP packet loss rate between client and TRTC node
    UDP RTT UDP latency between client and TRTC node
    Local RTT Latency between client and local gateway
    Upload Estimated upstream bandwidth
    Download Estimated downstream bandwidth

    Tool screenshots

    Quick test:

    Continuous test:

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