WO2009067875A1 - Procédé, système et dispositif de multidiffusion - Google Patents

Procédé, système et dispositif de multidiffusion Download PDF

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Publication number
WO2009067875A1
WO2009067875A1 PCT/CN2008/072785 CN2008072785W WO2009067875A1 WO 2009067875 A1 WO2009067875 A1 WO 2009067875A1 CN 2008072785 W CN2008072785 W CN 2008072785W WO 2009067875 A1 WO2009067875 A1 WO 2009067875A1
Authority
WO
WIPO (PCT)
Prior art keywords
multicast
intelligent control
access device
control rule
access
Prior art date
Application number
PCT/CN2008/072785
Other languages
English (en)
Chinese (zh)
Inventor
Jun Li
Xiong DENG
Peifeng Qin
Wumao Chen
Haijun Wu
Jinhui Zhang
Bo Ke
Yong Luo
Yue Chang
Jun Zhang
Original Assignee
Huawei Technologies Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CNA2007101255544A external-priority patent/CN101242292A/zh
Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Publication of WO2009067875A1 publication Critical patent/WO2009067875A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/16—Arrangements for providing special services to substations
    • H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
    • H04L12/189—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast in combination with wireless systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/16—Arrangements for providing special services to substations
    • H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
    • H04L12/185—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast with management of multicast group membership

Definitions

  • the embodiments of the present invention relate to the field of data communications, and in particular, to a multicast method, system, and apparatus. Background technique
  • the multicast system is usually composed of a multicast service system 110, an IP metropolitan area network 120, an access network 130, and a home network 140. Part of the composition.
  • the multicast service system 110 implements video user management, CA/DRM, and video encoding functions, and then sends the video service stream to the IP metropolitan area network 120; the IP metropolitan area network 120 sends the video service stream to the access network through the IP multicast function.
  • the access network 130 implements a control function of joining or leaving the video group, and sends the video stream required by the user to the user terminal.
  • the video multicast stream is sent from the IP metropolitan area network 120 to an access device directly connected to the user such as a Layer 2 switch or a DSLAM device.
  • IGMP Internet Group Management Protocol
  • the control packet sends the video stream to the required users.
  • One of the existing multicast processing mechanisms is to push all the multicast channels to the access device at the same time. Since the number of multicast channels is large, the bandwidth required for each channel is also wide, if a multicast The bandwidth of the channel is 4 ⁇ bps, and 1000 access channels support 1000 multicast channels. Therefore, for this access device, it is required to provide at least 4G bps of uplink bandwidth, which is highly demanding on the uplink network and is also wasteful. Regardless of whether the user with the access device has multicast channels on demand, it will occupy 4G bps of bandwidth.
  • Another existing multicast processing mechanism is to apply for the multicast stream to be sent to the upper layer network by the access device.
  • the process of joining the multicast is as follows:
  • the user terminal sends a request packet to join a multicast group A, and the access network receives the request for joining the multicast group A, and then determines whether the access network works in the IGMP Snooping mode. Send the request packet to the upper layer network If the access network works in IGMP Proxy mode, the access network continues to determine whether the user is the first multicast user to order the multicast channel. If yes, the access network will join the join of the multicast group. The request is sent to the upper layer network. If it is not the first user, the access network copies the already accessed video stream to the user.
  • the process of leaving the multicast is as follows:
  • the user terminal sends a >3 ⁇ 4 message leaving a multicast group A.
  • the access network determines whether there are other users on the access network that are also on demand.
  • the multicast group A if any, the access device does not send the leave request message to the upper layer device; if this is the last user of the multicast group A, the access device will be an upper layer device (for example, a multicast router) ) Issue the leave request message of multicast group A.
  • the upper device may frequently receive the leaving message or the join message of the channel, and the upper device can only delete and send the corresponding device.
  • the multicast program stream of the channel has a relatively large impact on the processing performance of the upper layer device.
  • the network has a relatively high requirement for the processing of the upper-layer device, and the multicast stream is often sent for a long time due to the application of the multicast stream between the access device and the upper-layer device. Broadcasting efficiency is relatively low. Summary of the invention
  • Embodiments of the present invention provide a multicast method, system, and apparatus, which improve multicast efficiency.
  • the embodiment of the invention provides a multicast method, including:
  • the access device sends a multicast request to the upper layer device according to the intelligent control rule
  • the upper layer device sends the multicast channel to the access device according to the multicast request, and maintains in the access device;
  • the access device When the user terminal sends a multicast join request to the access device, if the multicast channel is already maintained in the access device, the access device directly joins the user terminal to the multicast group.
  • the embodiment of the invention further provides a multicast method, including: The user terminal sends a request to the access device to leave the multicast channel; the access device determines, according to the intelligent control rule, whether the multicast channel needs to be maintained on the access device, and if the multicast channel needs to be maintained on the access device, The inbound device does not forward the multicast channel leaving request to the upper device. If the access device does not need to be maintained, the access device forwards the multicast channel leaving request to the upper device.
  • the embodiment of the invention further provides a multicast system, including:
  • the IP metropolitan area network transmits the video service provided by the multicast service system to the access network through the IP multicast function;
  • the access network is configured to send a video stream required by the user to the user terminal, where the access network has an intelligent control module, which can apply for or maintain a specific multicast channel according to the intelligent control rule, and implement the intelligence of joining or leaving the multicast. control.
  • the embodiment of the present invention further provides a digital subscriber line access multiplexer, which is connected to the IP metropolitan area network through the uplink interface, and is connected to the home network through the downlink interface, and has an intelligent control module, which can maintain a specific according to the intelligent control rule.
  • Multicast channel which implements intelligent control of multicast join or leave.
  • the embodiment of the present invention uses the intelligent control rule to maintain a part of the multicast channel on the access device, which can avoid frequent interaction between the access device and the upper device, simplify the processing of the access network, improve processing efficiency, and shorten the multicast on-demand time. To make the user's experience better.
  • FIG. 1 is a schematic diagram of an existing multicast system architecture
  • FIG. 2 is a schematic structural diagram of a multicast system according to an embodiment of the present invention.
  • FIG. 3 is a schematic flowchart of a process for a user to apply for joining multicast according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram of a process for a user to apply for leaving a multicast according to an embodiment of the present invention.
  • the multicast system of the embodiment of the present invention includes: a multicast service system 210, an IP metropolitan area network 220, an access network 230, and a home network 240.
  • the IP metropolitan area network 220 sends the video service provided by the multicast service system 210 to the access network 230 through the IP multicast function.
  • the access network 230 such as a DSLAM device, is connected to the IP metropolitan area network 220 through the uplink interface.
  • the connection is connected to the home network 240 through the downlink interface to send the video stream required by the user to the home network 240.
  • an intelligent control module 231 is added to the access network 230.
  • the intelligent control module 231 can support intelligent control rules generated according to the viewing statistics in a period of time, and can also support intelligent control rules generated according to specific time.
  • a schematic diagram of a process for a user to apply for joining a multicast includes the following steps:
  • Step 301 The access device sends a multicast request to the upper layer device according to the intelligent control rule.
  • Step 302 The upper device sends the multicast channel to the access device and maintains in the access device.
  • an automatic upper layer device for example, a multicast router
  • a multicast router automatically sends a multicast request
  • the multicast channel complying with the intelligent control rule is applied to the DSLAM device in advance. And keep it.
  • Step 303 The user terminal sends a multicast group A join request to the access device.
  • Step 305 The access device directly adds the user terminal to the multicast group A.
  • Step 306 The access device sends a multicast group A join request to the upper layer network. If a user sends a request message to the DSLAM device to join the multicast, the DSLAM device determines whether it maintains the multicast channel corresponding to the multicast group. If the multicast channel corresponding to the multicast group A is maintained, the user does not need to Apply to the multicast router to directly copy the multicast channel to the user port, and the user terminal can join the multicast group.
  • a schematic diagram of a process for a user to apply for leaving a multicast includes the following steps:
  • Step 401 The user terminal sends a multicast group to the access network to leave the message.
  • Step 402 The access network determines whether it works in the IGMP Proxy mode. If the access network works in the IGMP Proxy mode, step 403 is performed. If the access network does not work in the IGMP Proxy mode, step 405 is performed.
  • Step 403 The access network determines whether the user terminal is the last user of the multicast group. If the user terminal is the last user of the multicast group, step 405 is performed; if the user terminal is not the last user of the multicast group. Then, step 404 is performed.
  • Step 404 The user side processes the multicast group to leave the message, and the uplink network side discards the group group leaving message.
  • Step 405 The access network sends the multicast group leaving message to the intelligent control module for control.
  • Step 406 The access network determines whether the multicast group leaving the message meets the control rule of the multicast group. If the multicast group leaving message satisfies the intelligent control rule of the multicast group, step 407 is performed; If the multicast group leaving packet does not meet the control rule of the multicast group, go to step 408.
  • Step 407 The user side processes the multicast group leaving the message, and the uplink network side processes the multicast group leaving message according to the intelligent control rule (for example, discarding).
  • the intelligent control rule for example, discarding
  • Step 408 The access network sends the multicast group leaving message to the upper layer device.
  • DSLAM The multicast channel can be continuously maintained, and the leaving message of the multicast group is not sent to the multicast router. If other users want to order the multicast channel later, the DSLAM can directly copy to the user port without Then re-apply the multicast stream to the multicast router.
  • the DSLAM directly requests the multicast channel and maintains it. If the user sends a multicast leave message, the user does not report the message to the multicast router.
  • the DSLAM will automatically send an application to the multicast router to apply for the multicast stream of the multicast channel to the DSLAM. And in response to the query of the multicast router, the multicast channel is maintained. At this time, if there is a user on demand, the DSLAM can directly copy the multicast stream to the user port.
  • the multicast outgoing message sent by the user will not be reported to the multicast router, and the DSLAM still responds normally to the query of the multicast router.
  • the DSLAM After 12: 00 on Sunday night, if no user is watching the channel, the DSLAM will automatically send the leaving message of the multicast channel to the multicast router according to the intelligent control rule, and the multicast router will not deliver the multicast stream. If there are still users watching this channel, the user's leaving message will be processed according to the normal IGMP Snooping and IGMP Proxy processing principles.
  • the method of on-demand buffering can also be used:
  • the implementation of the on-demand buffer is based on the regularity of program-on-demand, which is due to region, time, living habits and culture. Differences and the like are presented. For example, in a football-loving country, there will be more viewers watching sports channels during football matches. For example, viewers who watch information programs in cities with strong information needs will usually have more viewers than in rural areas; The demand for the program is more than other time periods. This is the different regions, different living habits and cultural habits, so that the program on demand shows certain regularity in different time periods.
  • the multicast intelligent control module can add an on-demand cache to record the most recently ordered programs.
  • the on-demand cache can use a circular linked list that records several (eg, 20 to 50) programs of the latest on-demand. When this number is exceeded, the old program is automatically overwritten by the new on-demand record.
  • the program recorded to the on-demand storage needs to be filtered, because the multicast user converts the channel when watching the program, and the intermediate program when the channel is quickly switched should not be recorded in the on-demand buffer, but is recorded by the program that needs to be watched for a certain period of time. To the on-demand cache.
  • the probability that the program recorded in the on-demand cache is subsequently clicked is relatively large.
  • the multicast intelligent control module does not immediately send the leaving message to the upper layer device, but can wait for a period of time before sending the message to the upper layer device. Leaving the message, if there is another user on-demand the program during the waiting period, the program data can be quickly forwarded to the user.
  • the embodiment of the present invention further provides a digital subscriber line access multiplexer, which is connected to an IP metropolitan area network through an uplink interface, and is connected to a home network through a downlink interface, and the digital subscriber line access multiplexer has an intelligent control.
  • the intelligent control module can maintain a specific multicast channel according to intelligent control rules, and implement intelligent control of multicast joining or leaving.
  • the intelligent control rule may be a smart control rule generated according to the viewing statistics in a period of time, or may be an intelligent control rule generated according to a specific time.
  • the above intelligent control module also has an on-demand buffer unit for recording recently ordered programs.
  • the access device automatically sends a request for joining a specific multicast channel, and introduces certain specific multicast channels to the DSLAM within a certain period of time.
  • the device can be maintained to avoid frequent interactions between the access device and the upper-layer device, simplify the processing of the access network, improve processing efficiency, shorten the multicast on-demand time, and make the user experience better.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

L'invention concerne un procédé, un système et un dispositif de multidiffusion. Le procédé comporte les opérations suivantes : un dispositif d'accès envoie une demande de multidiffusion à un dispositif de couche supérieure selon une règle de commande intelligente, le dispositif de couche supérieure envoie la demande à un dispositif d'accès selon la demande de multidiffusion et la conserve ; lorsque le terminal utilisateur envoie une demande d'accès de multidiffusion au dispositif d'accès, le dispositif d'accès amène le terminal utilisateur à rejoindre un groupe de multidiffusion si le dispositif d'accès a conservé le canal de multidiffusion.
PCT/CN2008/072785 2007-11-01 2008-10-22 Procédé, système et dispositif de multidiffusion WO2009067875A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN200710124233.2 2007-11-01
CN200710124233 2007-11-01
CN200710125554.4 2007-12-27
CNA2007101255544A CN101242292A (zh) 2007-12-27 2007-12-27 一种组播方法、系统及装置

Publications (1)

Publication Number Publication Date
WO2009067875A1 true WO2009067875A1 (fr) 2009-06-04

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111343198A (zh) * 2020-04-03 2020-06-26 广西广播电视信息网络股份有限公司 基于组播vlan技术实现广播视频ip化的系统和方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1716902A (zh) * 2004-06-28 2006-01-04 华为技术有限公司 组播频道快速切换的实现方法
CN1764163A (zh) * 2005-11-07 2006-04-26 杭州华为三康技术有限公司 组播报文的智能转发方法及系统
CN1921402A (zh) * 2006-08-15 2007-02-28 华为技术有限公司 一种组播业务处理方法以及系统
CN101242292A (zh) * 2007-12-27 2008-08-13 华为技术有限公司 一种组播方法、系统及装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1716902A (zh) * 2004-06-28 2006-01-04 华为技术有限公司 组播频道快速切换的实现方法
CN1764163A (zh) * 2005-11-07 2006-04-26 杭州华为三康技术有限公司 组播报文的智能转发方法及系统
CN1921402A (zh) * 2006-08-15 2007-02-28 华为技术有限公司 一种组播业务处理方法以及系统
CN101242292A (zh) * 2007-12-27 2008-08-13 华为技术有限公司 一种组播方法、系统及装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111343198A (zh) * 2020-04-03 2020-06-26 广西广播电视信息网络股份有限公司 基于组播vlan技术实现广播视频ip化的系统和方法

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