No relevant resource is found in the selected language.

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies. Read our privacy policy>Search

Reminder

To have a better experience, please upgrade your IE browser.

upgrade

CloudEC V600R019C00 Troubleshooting (Enterprise On-premises, Convergent Conference)

Rate and give feedback:
Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Intermittent Voice

Intermittent Voice

Symptoms and Possible Causes

Symptoms: In a multi-party conference or P2P call, other participants' voice heard by a participant is intermittent or the participant's voice heard by other participants is intermittent.

Exceptions of the endpoints and transmission network may cause intermittent voice in a conference. Common root causes are as follows:

[Endpoint problems]: Voice collected by the endpoint is intermittent due to interference from the bluetooth and wireless MIC.

[Transmission network faults]: The transmission network fault, including packet loss from the MCU to the SBC and from the SBC and the endpoint, is the most common cause for intermittent voice.

Note: Detection of intermittent voice collected by the endpoint depends on the signal-layer wave test whose performance overhead is large. In addition, no suitable algorithm is available currently. Therefore, you cannot directly determine the cause currently. After you eliminate problems on the network side, you can check for endpoint problems.

Processing Idea

Check whether packets are lost at the media receiving end. If packets are lost, check for the stage where the packets are lost.

Diagnosis

Figure 1-10 Intermittent Voice
P1, Other Participants' Voice Heard by the Local Participant Is Intermittent

[Determination rule]

During a conference, if other participants' voice heard by a participant is intermittent but voice communication between the other participants is normal, you can determine that the downstream path of the participant is abnormal. Therefore, the diagnosis process goes to this branch.

P2, Voice Packets Received by the Local Participant Are Lost

[Determination rule]

Voice packets received by the local participant are lost. The packet loss rate of the pickup party's endpoint (Loss(Network receiving)) is used for determination. When the network is normal, the packet loss rate of the pickup party's endpoint is 0. Counter data of the pickup party's packet loss rate indicates whether packets are lost on the network. If the user's MOS trend is closely related to the packet loss rate, you can determine that packet loss causes intermittent voice.

[Example]

As shown in Figure 1 Counters indicating the MOS and the loss rate of voice packets received by the endpoint on the network, select Decoding, Network receiving and MOS(Network receiving), RTT(Network receiving), Packets(Network receiving), Loss(Network receiving), Bandwidth(Network receiving) for Counter receiving settings to display statistics about the MOS and the loss rate of voice packets received by the endpoint on the network. In the whole call life cycle, the MOS decreases for three times and the packet loss rate increases each time when the MOS decreases. Then, you can determine that packet loss causes intermittent voice.

Figure 1-11 Counters indicating the MOS and the loss rate of voice packets received by the endpoint on the network
P3, Voice Packets Received by the SBC from the MCU Are Lost

[Determination rule]

Voice packets received by the SBC from the MCU are lost. The average loss rate of packets received by the recipient at the core side of the SBC is used for determination. As shown in Figure 1 Counter indicating the average loss rate of voice packets received by the SBC on the network, the packet loss rate of the pickup party's endpoint is 0 when the network is normal. Counter data of the SBC's packet loss rate indicates whether packets are lost on the transmission network from the MCU to the SBC. If the trend of the pickup party endpoint's packet loss rate is closely related to the SBC's packet loss rate, you can determine that loss of voice packets received by the SBC from the MCU causes intermittent voice.

[Example]

Figure 1-12 Counter indicating the average loss rate of voice packets received by the SBC on the network
P4, The Local Participant's Voice Heard by Other Participants Is Intermittent

[Determination rule]

During a conference, if a participant's voice heard by other participants is intermittent but voice communication between the other participants is normal, you can determine that the upstream path of the participant is abnormal. Therefore, the diagnosis process goes to this branch.

P5, Voice Packets Received by the MCU of the Local Participant Are Lost

[Determination rule]

Voice packets received by the MCU of the local participant are lost. The loss rate of voice packets received by the MCU on the network (Loss(Network receiving)) is used for determination. When the network is normal, the loss rate of voice packets received by the MCU on the network is 0. Counter data of the MCU's packet loss rate indicates whether packets are lost on the network. If the packet loss rate increases obviously, you can determine that loss of voice packets received by the MCU causes intermittent voice.

Note: Currently, voice MOS calculation is not implemented in the MCU. Therefore, you can only determine an approximate period where intermittent voice occurs based on the user feedback.

[Example]

As shown in Figure 1 Counter indicating the loss rate of packets received by the MCU on the network, select Network receiving, Decoding and RTT(Network receiving), Packets(Network receiving), Loss(Network receiving) for Counter receiving settings to display statistics about the packet loss rate of the recipient of the MCU on the network. In the call life cycle, the packet loss rate increases obviously for three times. Then, you can determine that packet loss causes intermittent voice.

Figure 1-13 Counter indicating the loss rate of packets received by the MCU on the network
P6, Voice Packets Received by the SBC from the Endpoint Are Lost

[Determination rule]

Voice packets received by the SBC from the endpoint are lost. The average loss rate of packets received by the recipient at the access side of the SBC is used for determination. In normal cases, the packet loss rate is 0. Counter data of the SBC's packet loss rate indicates whether packets are lost on the transmission network from the endpoint to the SBC. If the trend of the MCU's packet loss rate is closely related to the SBC's packet loss rate, you can determine that loss of voice packets received by the SBC from the endpoint causes intermittent voice.

[Example]

Obtain the counter data of the average loss rate of voice packets received by the SBC by referring to P3, Voice Packets Received by the SBC from the MCU Are Lost and determine whether voice packets received by the SBC from the endpoint are lost based on the counter data.

Translation
Download
Updated: 2019-08-07

Document ID: EDOC1100059098

Views: 22419

Downloads: 12

Average rating:
This Document Applies to these Products
Related Version
Related Documents
Share
Previous Next