WO2009059521A1 - Procede et systeme de controle et de commande de qualite de transmission multimedia - Google Patents

Procede et systeme de controle et de commande de qualite de transmission multimedia Download PDF

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Publication number
WO2009059521A1
WO2009059521A1 PCT/CN2008/072817 CN2008072817W WO2009059521A1 WO 2009059521 A1 WO2009059521 A1 WO 2009059521A1 CN 2008072817 W CN2008072817 W CN 2008072817W WO 2009059521 A1 WO2009059521 A1 WO 2009059521A1
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WIPO (PCT)
Prior art keywords
media
transmission quality
media gateway
quality indicator
resource
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Application number
PCT/CN2008/072817
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English (en)
Chinese (zh)
Inventor
Weiwei Yang
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Huawei Technologies Co., Ltd.
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Filing date
Publication date
Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Publication of WO2009059521A1 publication Critical patent/WO2009059521A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/80—Responding to QoS

Definitions

  • the invention relates to the field of communication technologies, in particular to the detection and control of media transmission quality under a service and bearer separation architecture.
  • FIG. 1 it is a schematic diagram of networking of MG and MGC in the prior art NGN.
  • the MGC is responsible for the call control function, and the MG is responsible for the service bearer function, thereby separating the call control plane and the service bearer plane, thereby fully sharing network resources, simplifying equipment upgrade and service expansion, and greatly reducing development and maintenance costs.
  • the Media Gateway Control Protocol is the main protocol for communication between the MG and the MGC.
  • H.248/MeGaCo and MGCP protocols are two widely used H.248/MeGaCo and MGCP protocols.
  • IPTV QoE IPTV quality of experience
  • the MG acts as a bearer entity on the media stream transmission path and receives and/or forwards the media data
  • it is required to satisfy the network-to-end service quality detection and guarantee of the media stream transmission, and effectively evaluate the gateway device to the IPTV service.
  • Supporting capabilities, MG need to timely track and collect MDI indicators of media streaming to prevent network failures and ensure the quality of media transmission.
  • MDI indicators of media streaming to prevent network failures and ensure the quality of media transmission.
  • a first object of the embodiments of the present invention is to provide a method and system for detecting media transmission quality, which enable a media gateway controller and a media gateway to monitor transmission quality indicators.
  • a second object of the embodiments of the present invention is to provide a media transmission quality control method and a media transmission quality control system, so that the media gateway controller can control the media gateway to ensure media transmission quality. Indicator.
  • an embodiment of the present invention provides a method for monitoring media transmission quality, including the following steps: a media gateway detects a delay coefficient and a media loss rate of a media carried thereon; and the media gateway uses the delay coefficient and the media. The loss rate is reported to the media gateway controller as media transmission quality indicator information.
  • the embodiment of the present invention further provides a media transmission quality monitoring system, including a media gateway and a media gateway controller, where the media gateway is configured to detect a delay coefficient and a media loss rate of a media carried thereon, and delay the detection.
  • the coefficient and the media loss rate are reported to the media gateway controller as the media transmission quality indicator information, and the media gateway controller is configured to receive the media transmission quality indicator information reported by the media gateway.
  • the embodiment of the present invention further provides a media gateway, including: an MDI indicator detecting unit, configured to detect a delay coefficient and a media loss rate of a bearer medium; and an MDI indicator reporting unit, configured to detect a delay coefficient and a medium detected by the MDI indicator detecting unit.
  • the loss rate is reported to the media gateway controller as media transmission quality indicator information.
  • the embodiment of the present invention further provides a media gateway controller, including: a request message sending unit, configured to send, to the media gateway, a request message for requesting media transmission quality indicator information detection, where the media transmission quality indicator information is delayed by The media loss rate is displayed; the MDI indicator receiving unit is configured to receive the media transmission quality indicator information reported by the media gateway.
  • a request message sending unit configured to send, to the media gateway, a request message for requesting media transmission quality indicator information detection, where the media transmission quality indicator information is delayed by The media loss rate is displayed
  • the MDI indicator receiving unit is configured to receive the media transmission quality indicator information reported by the media gateway.
  • an embodiment of the present invention provides a method for controlling media transmission quality, including the following steps:
  • the media gateway controller determines a resource policy according to a desired media transmission quality indicator, and obtains a resource policy for ensuring media transmission quality indicators.
  • the media transmission quality indicator is represented by a delay coefficient and a media loss rate; and the resource policy for guaranteeing the media transmission quality indicator is sent to the media gateway for execution.
  • the embodiment of the present invention further provides a media transmission quality control system, including a media gateway controller and a media gateway, where the media gateway controller is configured to determine a resource policy according to a desired media transmission quality indicator, and obtain a resource policy for ensuring media transmission quality indicators. And sending the resource policy for securing the media transmission quality indicator to the media gateway, where the media transmission quality indicator is determined by a delay coefficient and a media The loss rate is implemented by the media gateway, and is configured to perform corresponding resource allocation and adjustment according to the resource policy for ensuring the media transmission quality indicator.
  • the embodiment of the present invention further provides a media gateway controller, including: a resource policy determining unit, configured to determine a resource policy according to a desired media transmission quality indicator, and obtain a resource policy for securing a media transmission quality indicator, where the media transmission quality indicator is The delay coefficient and the media loss rate are implemented; the resource policy sending unit is configured to send the resource policy to the media gateway for execution.
  • a resource policy determining unit configured to determine a resource policy according to a desired media transmission quality indicator, and obtain a resource policy for securing a media transmission quality indicator, where the media transmission quality indicator is The delay coefficient and the media loss rate are implemented
  • the resource policy sending unit is configured to send the resource policy to the media gateway for execution.
  • the embodiment of the present invention further provides a media gateway, including: a resource policy receiving unit, configured to receive a resource policy delivered by a media gateway controller, where the resource policy carries an attribute parameter used to indicate a media transmission quality indicator; An analyzing unit, configured to analyze a resource policy received by the resource policy receiving unit, and obtain, according to the attribute parameter carried by the resource parameter, a resource parameter required to obtain the requested media transmission quality indicator; and an execution unit, configured to analyze the unit according to the resource policy
  • the obtained resource parameters are corresponding to resource allocation and adjustment.
  • the media transmission quality detection method and system provided by the embodiment of the present invention can enable the media gateway to detect the extended delay coefficient and the media loss rate, obtain media transmission quality indicator information, and transmit the media.
  • the quality indicator information is reported to the media gateway controller, so that the media gateway controller can know the change of the media transmission quality on the MG in time.
  • the method and system for detecting media transmission quality provided by the embodiments of the present invention can enable the media gateway to determine a media resource quality resource policy according to the delay coefficient and the media loss rate of the MDI indicator, and ensure end-to-end control by controlling the MDI indicator.
  • the media stream is reliably transmitted.
  • FIG. 1 is a schematic diagram of networking of an MG and an MGC in a prior art NGN;
  • FIG. 3 is a schematic diagram of a monitoring system for media transmission quality according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a media transmission quality control system according to an embodiment of the present invention.
  • the characteristics of network transmission can be summarized into three indicators: delay, jitter and packet loss.
  • delay can have a significant impact on the timeliness and accuracy of IPT V packet forwarding.
  • the resulting network transmission failures can have varying degrees of adverse effects on video quality, such as mosaic, image blur, edge distortion, tremor (bumping) and vision. Noise, etc.
  • MDI Media Delivery Index
  • DF Delay Factor
  • MLR Media Loss Rate
  • the DF value expresses the interval value at which each packet is displayed at the test point or the time of arrival of the record.
  • the MLR gives the number of packet losses or the number of out-of-sequence packets in the selected time interval.
  • MDI is not affected by the media coding scheme, independent of various transport protocols and stream encapsulation protocols. It is a simple and scalable measurement scheme that can replace the measurement and verification of the media (audio and video) itself to some extent. method.
  • MDI can be used to locate and characterize network failures that adversely affect media quality and the quality of user experience. If MDI is tracked at the midpoint of the transport network, the difference in MDI metrics between successive network elements can help quickly isolate potential problems or existing impairments. If the media loss rate of the previous hop (Hop) in the IPTV data stream path is zero, and a large media loss rate is introduced after a certain network bearer device (such as a gateway or router), this obviously indicates that There are performance issues in the device, such as buffer overflows or packet corruption. Similarly, if the delay coefficient changes significantly in two consecutive hops (Hop), indicating a longer queue delay due to packet congestion, this situation can also alert for impending packet loss.
  • Hop media loss rate of the previous hop
  • a certain network bearer device such as a gateway or router
  • IP video streaming quality testing As an industry standard for IP video streaming quality testing, MDI measurement indicators have been adopted by the IP Video Quality Alliance (IPVQA) and are widely used in IPTV and IP cable digital TV networks. Quantity assessment and monitoring.
  • IPVQA IP Video Quality Alliance
  • IP video streaming quality testing As an industry standard for IP video streaming quality testing, MDI measurement metrics have been adopted by the IP Video Quality Consortium (IPVQA) and are widely used for IPTV and IP cable digital TV network quality assessment and monitoring.
  • IPVQA IP Video Quality Consortium
  • the MG acts as a bearer entity on the media stream transmission path, when receiving and/or forwarding media data, in order to realize end-to-end service quality detection and guarantee of network to media stream transmission and effectively evaluate the support capability of the gateway device to the IPTV service, MG It is necessary to timely track and collect the MDI indicators of media streaming to prevent network failures and ensure the quality of media transmission.
  • a Statistic parameter is extended to indicate the MDI indicator of media transmission quality.
  • the statistical parameter is named "Media Delivery Index (mdi)". This statistical parameter can be attributed to an existing or newly developed package.
  • the content of the mdi parameter is defined in RFC 4445 and includes the delay factor (df) and the media loss rate (mell).
  • the type of the statistical parameter is a string (String), and the format can be the same as the MDI format of RFC 4445, namely df:mlr.
  • the df of the statistical parameter mdi is a time value, which represents the interval value at which the packet is displayed or recorded at the gateway node, indicating how many milliseconds of data the MG buffer must contain in order to eliminate jitter.
  • the delay coefficient can reflect whether the video will be distorted, so that the user's experience quality can be obtained at a certain level.
  • the delay factor also determines the impact of a single network element in the video stream transmission path. By comparing the df flowing into the device with the df of the outgoing device, it can be determined whether the device injects too much jitter to affect the transmission of the video.
  • the mlr of the statistical parameter mdi can be defined as the loss of media packets during the selected time interval (or The number of abnormal packets, usually selected at an interval of 1 second. For the calculation method, see RFC 4445.
  • the detection of abnormal packets is very important because many devices in the network often do not reorder the received packets and send them directly to the decoder. Any packet loss (ie, when a non-zero mlr occurs) can adversely affect video quality and cause visual distortion or anomalies as well as uneven video playback.
  • This statistical parameter can be applied at the terminal level or stream level.
  • the parameter When applied to an MG or a specific terminal, the parameter represents the quality indicator of all media stream transmissions on the MG or the terminal; and when applied to a specific stream, it represents the media stream. Transmission quality indicator.
  • the MGC can obtain the media transmission quality indicator information of the media stream transmission on the MG in time to achieve real-time monitoring and QoE protection.
  • the MGC can combine the statistical method of H.248.47 to preset a certain threshold for the mdi statistical parameter (df, mlr). Once the MG detects the value of mdi. Below or above the threshold, the relevant events are reported to the MGC so that the MGC can grasp various abnormal conditions in the network transmission in time.
  • df Delay Factor
  • mlr Media Loss Rate
  • a property parameter is extended to indicate the MDI indicator for guaranteeing the quality of the media transmission (ie, It is used to indicate the guarantee MDI indicator), and the MG is required to reserve corresponding bearer resources for this purpose.
  • the attribute parameter is named "Request Media Delivery Index (abbreviated as rmdi)".
  • This statistical parameter can be attributed to an existing or newly developed package.
  • the content of the rmdi parameter can include the delay factor (df) and the medium.
  • the two parts of the media loss rate (Media Loss Rate, mlr) are defined as the previous statistical parameter mdi.
  • the MGC sends the rmdi attribute to the MG, and instructs the MG to reserve the relevant bearer resources according to the MDI indicators included in the attribute parameters, so as to prevent the occurrence of the gateway fault and ensure the transmission quality of the media stream.
  • the two contents of the above attribute parameter rmdi can also be split into two independent attribute parameters, for example, the two attribute parameters are respectively named as: Request Delay Factor (rdf) and requested media loss rate. (Request Media Loss Rate, rmlr), which is defined as described in the previous statistical parameters df and mdi.
  • a new H.248 packet can be defined.
  • the statistical parameter is named "Media Delivery Index Monitor (abbreviated as mdim) package. ".
  • the attributes and statistical parameters as described above may be included.
  • the MGC and the MG can track and collect the quality indicator information in the media stream transmission in time through the statistical parameter; on the other hand, the MGC can perform the bearer resource on the MG by using the extended attribute. Effective control to monitor and prevent various anomalies in network transmission in real time, thus effectively supporting network end-to-end transmission quality assurance.
  • the monitoring process of the MDI indicator implemented by applying the embodiment of the present invention includes the following steps:
  • Step 1 The MGC indicates the mdi statistic parameter to the MG when the terminal is created or the flow is added (the Add command or the Modify command is sent as follows), and the statistical media transmission quality indicator information is required.
  • the media transmission quality indicator information is embodied as the bearer media on the MG. Delay factor and media loss rate.
  • Step 2 The MG responds to the MGC's request indication and begins collecting and counting related media transmission quality indicator information (including delay coefficient df and media loss rate mlr).
  • Step 3 The MGC requests the message to audit the statistical parameter mdi on the MG through an audit value ( AuditValue ) (or The values of df and mlr) are used to keep abreast of the quality of media transmission on the MG.
  • the audit of statistical parameters can be applied to a terminal or a specific stream on the MG.
  • the format of the request message can be as follows:
  • the message format of the audit value request message can be as follows (for example, the flow of the flow identifier 2 is required to be audited on the terminal A5556).
  • Step 4 The MG detects the detected delay coefficient df and the media loss rate mlr as the media transmission quality indicator information, and reports the response value to the MGC through the audit value.
  • the format of the reply message of the terminal level statistics is as follows (audit the terminal A5556 on the MG) ⁇
  • Step 5 The MGC receives the media transmission quality indicator information reported by the MG, and if it finds that the received media transmission quality indicator information does not match the expected MDI indicator value, determines a resource policy according to the expected media transmission quality indicator (such as formulating a new resource policy, Adjust or maintain the existing resource strategy), and obtain a resource strategy to guarantee media transmission quality indicators.
  • This step can be performed by analyzing the expected MDI indicator, and generating an attribute parameter (in the case of requesting the media transmission quality indicator (rmdi) as an example), and carrying it in the adjusted resource policy, and sending it to the MG, requesting The MG performs corresponding resource allocation and adjustment.
  • Step 6 The MG analyzes the media transmission quality indicator rmdi carried in the adjusted resource policy, and obtains resource parameters (such as bandwidth, buffer, jitter, etc.) required to achieve the indicators, and performs corresponding according to the resource parameters. Resource allocation and adjustment, and send a response message to the MGC.
  • the MG can detect the MDI indicator according to the request of the MGC, and report the detection result to the MGC, so that the MGC can timely adjust the network control policy according to the change of the media transmission quality on the MG, and prevent possible network failure.
  • a threshold value (the threshold value is a desired MDI value) may be directly set on the MG.
  • the MG When the MG detects that the MDI indicator is lower than or higher than the threshold, the MG reports to the MGC.
  • the MGC directly adjusts the resource strategy based on the expected MDI value.
  • the MGC performs resource policy adjustment according to the expected MDI value, and the MGC can directly analyze the expected MDI value, and obtain the resource parameters required to achieve these indicators, and determine the resource policy adjustment according to the parameter value, which will be determined.
  • the resource policy is sent to the MG for execution.
  • FIG. 3 is a monitoring system for implementing media transmission quality according to an embodiment of the present invention.
  • the monitoring system includes MGC31 and MG32.
  • the MGC 31 is used to monitor media stream MDI indicators on the MG32, including:
  • the request message sending unit 311 is configured to send an indication for requesting the statistical media transmission quality indicator information to the MG, and send an audit request, and request the auditing of the value of the statistical parameter mdi (or df and mlr) on the MG to obtain the medium on which the medium is carried.
  • Media transmission quality indicator information
  • the MDI indicator receiving unit 312 is configured to receive media transmission quality indicator information reported by the MG.
  • the resource policy determining unit 313 is configured to determine, when the media transmission quality indicator information received by the MDI indicator receiving unit 312 does not match the expected MDI indicator, A resource policy indicating protection of the desired media transmission quality indicator. For example, the attribute parameter is generated, and the attribute parameter is used to instruct the MG to perform corresponding resource allocation and adjustment according to the MDI indicator included in the attribute parameter (for example, to reserve related bearer resources).
  • the resource policy issuing unit 314 is configured to deliver the resource policy determined by the resource policy determining unit 313 to the MG.
  • the MG32 is configured to detect the media transmission quality indicator information, and report the detected media transmission quality indicator information to the media gateway controller, including:
  • the request message receiving unit 321 is configured to receive an indication that the media gateway controller sends the request for the statistical media transmission quality indicator information, and a request message for obtaining the media transmission quality indicator information, and the The indication and request messages are respectively forwarded to the MDI indicator detecting unit 322 and the MDI indicator reporting unit 323;
  • the MDI indicator detecting unit 322 is configured to detect a delay coefficient and a media loss rate of each terminal or media stream on the MG32.
  • the MDI indicator reporting unit 323 is configured to report the delay coefficient and the media loss rate to the media gateway controller as the media transmission quality indicator information by the MDI indicator detecting unit 322.
  • the resource policy receiving unit 324 is configured to receive the resource policy delivered by the resource policy issuing unit 314 of the MGC;
  • the resource policy analysis unit 325 is configured to analyze the resource policy received by the resource policy receiving unit 324;
  • the executing unit 326 is configured to perform corresponding resource allocation and adjustment according to the analysis of the resource policy analyzing unit 325.
  • the MGC may include an MDI indicator analyzing unit, configured to analyze the expected MDI indicator when the media transmission quality indicator information received by the receiving unit does not match the expected MDI indicator, and obtain To achieve the resource parameters required by these indicators, then adjust the resource strategy based on the resource parameters obtained from the analysis.
  • an MDI indicator analyzing unit configured to analyze the expected MDI indicator when the media transmission quality indicator information received by the receiving unit does not match the expected MDI indicator, and obtain To achieve the resource parameters required by these indicators, then adjust the resource strategy based on the resource parameters obtained from the analysis.
  • the concept of the present invention can be used to directly control the quality of the media transmission by the MGC, as follows:
  • the media gateway controller determines a resource policy according to the expected media transmission quality indicator, and obtains a resource policy for guaranteeing the media transmission quality indicator, where the media transmission quality indicator is represented by a delay coefficient and a media loss rate;
  • the resource policy for guaranteeing the media transmission quality indicator is sent to the media gateway for execution.
  • Step 1 The MGC performs resource policy adjustment according to the expected MID indicator, and passes the expected MDI indicator through the attribute parameter ( For example, the request media transmission quality indicator rmdi is carried in the Modify request message and sent to the MG, and the requested media transmission quality indicator attribute (rmdi) on the MG is set, where the rmdi attribute includes the relevant MDI indicator, indicating that the MGC indicates that the MG needs Guaranteed Media transmission quality indicators.
  • Step 2 The MG receives the modification request message of the MGC, analyzes the resource parameters required to achieve the indicator according to a preset algorithm, and allocates or adjusts related resources for the media stream transmission (such as reserving corresponding bearer resources), and Send a Modify response message to the MGC.
  • the MGC can directly analyze the expected MDI indicators, and obtain the resource parameters required to achieve these indicators, and carry the resource parameters in the request message sent to the media gateway.
  • the control system includes a media gateway controller 51 and a media gateway 52.
  • the media gateway controller 51 is configured to send a resource policy to the media gateway 52 according to the expected MDI indicator, and request the media gateway 52 to perform corresponding resource allocation and adjustment, including:
  • the resource policy determining unit 511 is configured to determine a resource policy according to the expected media transmission quality indicator, and obtain a resource policy for securing the media transmission quality indicator, where the media transmission quality indicator is reflected by the delay coefficient and the media loss rate;
  • the resource policy sending unit 512 is configured to send the determined resource policy to the media gateway 52, and request the media gateway 52 to perform corresponding resource allocation and adjustment, where the resource policy carries an attribute parameter (such as requesting media transmission quality) for indicating the guaranteed MDI indicator.
  • the indicator rmdi the attribute parameter is generated according to the expected MDI indicator, and includes the relevant MDI indicator.
  • the media gateway 52 includes a resource policy receiving unit 521, configured to receive a resource policy issued by the media gateway controller.
  • the resource policy analysis unit 522 is configured to analyze the resource policy, and obtain a resource parameter that is required to reach the requested media transmission quality indicator, and send the resource parameter to the execution unit 523 to perform corresponding resource allocation and adjustment.
  • the executing unit 523 is configured to perform corresponding resource allocation and adjustment according to the analysis result of the resource policy analyzing unit 522.
  • the MGC of this embodiment may also be configured with an analysis unit for analyzing the desired MDI indicator.
  • the resource parameters required to reach the metrics are obtained, and the resource parameters are sent to the resource policy sending unit 512.
  • the resource policy analyzing unit 522 of the MG directly sends the resource parameters to the executing unit 523 to perform corresponding resources. Assignment and adjustment.
  • the media gateway detects the extended delay coefficient and the media loss rate, obtains the MDI indicator, and reports the MDI indicator to the media gateway controller, so that the media gateway controller can know the media on the MG in time.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

L'invention concerne un procédé et un système de contrôle et de commande de qualité de transmission multimédia. Une passerelle multimédia détecte des informations d'indice de qualité de transmission multimédia transportant des supports, obtient un indice MDI et présente les informations d'indice de qualité à un contrôleur de passerelle multimédia, de sorte que ce dernier obtienne à temps le changement de qualité de transmission sur la passerelle, ce qui permet d'effectuer le contrôle et la commande de la qualité de transmission. En outre, la passerelle peut ajuster une stratégie de ressources par régulation de l'indice MDI, de sorte à assurer une transmission fiable du flux multimédia de bout en bout.
PCT/CN2008/072817 2007-11-01 2008-10-24 Procede et systeme de controle et de commande de qualite de transmission multimedia WO2009059521A1 (fr)

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CN101924683B (zh) * 2009-06-09 2013-04-24 华为技术有限公司 一种动态调整抖动缓存的方法、装置和电子设备
CN111866911A (zh) * 2019-04-26 2020-10-30 瞻博网络公司 对流媒体有条件执行媒体传输指标测量的装置、系统和方法
CN111866911B (zh) * 2019-04-26 2024-03-29 瞻博网络公司 对流媒体有条件执行媒体传输指标测量的装置、系统和方法
CN115225936A (zh) * 2021-04-19 2022-10-21 中国移动通信集团河北有限公司 一种视频资源的清晰度指标确定方法、装置、设备及介质
CN115225936B (zh) * 2021-04-19 2023-07-14 中国移动通信集团河北有限公司 一种视频资源的清晰度指标确定方法、装置、设备及介质

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