tencent cloud

Boost Engagement with Tencent RTC Free TrialFree video and chat features await!

Feedback

Tencent Real-Time Communication
Last updated: 2023-09-28 11:54:53
Before entering the room or during the call, you can check the user's network quality to determine the current network quality. If the user's network quality is too poor, it is recommended that the user change the network environment to ensure normal call quality.
This article mainly introduces how to implement network quality detection before the call based on the NETWORK_QUALITY event.

Network quality check during the call process

const trtc = TRTC.create();
trtc.on(TRTC.EVENT.NETWORK_QUALITY, event => {
console.log(`network-quality, uplinkNetworkQuality:${event.uplinkNetworkQuality}, downlinkNetworkQuality: ${event.downlinkNetworkQuality}`)
console.log(`uplink rtt:${event.uplinkRTT} loss:${event.uplinkLoss}`)
console.log(`downlink rtt:${event.downlinkRTT} loss:${event.downlinkLoss}`)
})

Network quality check before making a call

Implementation process

1. Call TRTC.create() to create two TRTCs, referred to as uplinkTRTC and downlinkTRTC.
2. Both TRTCs enter the same room.
3. Use uplinkTRTC to push the stream, and listen to the NETWORK_QUALITY event to detect the uplink network quality.
4. Use downlinkTRTC to pull the stream, and listen to the NETWORK_QUALITY event to detect the downlink network quality.
5. The entire process lasts for about 15 seconds, and finally takes the average network quality to roughly determine the uplink and downlink network conditions.
notice
The process of checking network quality incurs a small basic service fee. If a resolution is not specified, the stream will be published at a resolution of 640 x 480.

API Call Sequence


network-quality-call-sequence



Sample Code


let uplinkTRTC = null; // Used to detect uplink network quality
let downlinkTRTC = null; // Used to detect downlink network quality
let localStream = null; // Stream used for testing
let testResult = {
// Record uplink network quality data
uplinkNetworkQualities: [],
// Record downlink network quality data
downlinkNetworkQualities: [],
average: {
uplinkNetworkQuality: 0,
downlinkNetworkQuality: 0
}
}

// 1. Test uplink network quality
async function testUplinkNetworkQuality() {
uplinkTRTC = TRTC.create();

uplinkTRTC.enterRoom({
roomId: 8080,
sdkAppId: 0, // Fill in sdkAppId
userId: 'user_uplink_test',
userSig: '', // userSig of uplink_test
scene: 'rtc'
})

uplinkTRTC.on(TRTC.EVENT.NETWORK_QUALITY, event => {
const { uplinkNetworkQuality } = event;
testResult.uplinkNetworkQualities.push(uplinkNetworkQuality);
});

}

// 2. Detect downlink network quality
async function testDownlinkNetworkQuality() {
downlinkTRTC = TRTC.create();
downlinkTRTC.enterRoom({
roomId: 8080,
sdkAppId: 0, // Fill in sdkAppId
userId: 'user_downlink_test',
userSig: '', // userSig
scene: 'rtc'
});

downlinkTRTC.on(TRTC.EVENT.NETWORK_QUALITY, event => {
const { downlinkNetworkQuality } = event;
testResult.downlinkNetworkQualities.push(downlinkNetworkQuality);
})
}

// 3. Start detection
testUplinkNetworkQuality();
testDownlinkNetworkQuality();

// 4. Stop detection after 15s and calculate the average network quality
setTimeout(() => {
// Calculate the average uplink network quality
if (testResult.uplinkNetworkQualities.length > 0) {
testResult.average.uplinkNetworkQuality = Math.ceil(
testResult.uplinkNetworkQualities.reduce((value, current) => value + current, 0) / testResult.uplinkNetworkQualities.length
);
}

if (testResult.downlinkNetworkQualities.length > 0) {
// Calculate the average downlink network quality
testResult.average.downlinkNetworkQuality = Math.ceil(
testResult.downlinkNetworkQualities.reduce((value, current) => value + current, 0) / testResult.downlinkNetworkQualities.length
);
}
// Detection is over, clean up related states.
uplinkTRTC.exitRoom();
downlinkTRTC.exitRoom();
}, 15 * 1000);

Result Analysis

After the above steps, you can get the average uplink network quality and the average downlink network quality. The enumeration values of network quality are as follows:
Value
Meaning
0
The network condition is unknown, indicating that the current TRTC instance has not established an uplink/downlink connection
1
The network condition is excellent
2
The network condition is good
3
The network condition is average
4
The network condition is poor
5
The network condition is extremely poor
6
The network connection has been disconnected. Note: If the downlink network quality is this value, it means that all downlink connections have been disconnected.
Suggestion:
When the network quality is greater than 3, it is recommended to guide the user to check the network and try to change the network environment, otherwise it is difficult to ensure normal audio and video communication. <br> You can also reduce bandwidth consumption through the following strategies:
If the uplink network quality is greater than 3, you can reduce the bitrate through the TRTC.updateLocalVideo() interface or close the video through the TRTC.stopLocalVideo() method to reduce uplink bandwidth consumption.
If the downlink network quality is greater than 3, you can reduce the downlink bandwidth consumption by subscribing to a small stream (refer to: Enable Small Stream Transmission) or only subscribing to audio.

Contact Us

Contact our sales team or business advisors to help your business.

Technical Support

Open a ticket if you're looking for further assistance. Our Ticket is 7x24 avaliable.

7x24 Phone Support
Hong Kong, China
+852 800 906 020 (Toll Free)
United States
+1 844 606 0804 (Toll Free)
United Kingdom
+44 808 196 4551 (Toll Free)
Canada
+1 888 605 7930 (Toll Free)
Australia
+61 1300 986 386 (Toll Free)
EdgeOne hotline
+852 300 80699
More local hotlines coming soon