WO2010037318A1 - Système et procédé de transmission de données - Google Patents

Système et procédé de transmission de données Download PDF

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Publication number
WO2010037318A1
WO2010037318A1 PCT/CN2009/074024 CN2009074024W WO2010037318A1 WO 2010037318 A1 WO2010037318 A1 WO 2010037318A1 CN 2009074024 W CN2009074024 W CN 2009074024W WO 2010037318 A1 WO2010037318 A1 WO 2010037318A1
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WO
WIPO (PCT)
Prior art keywords
channel
data
channels
data transmission
module
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Application number
PCT/CN2009/074024
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English (en)
Chinese (zh)
Inventor
陈谦
李沛昭
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腾讯科技（深圳）有限公司
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Publication of WO2010037318A1 publication Critical patent/WO2010037318A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1854—Scheduling and prioritising arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L2001/0092—Error control systems characterised by the topology of the transmission link
    • H04L2001/0096—Channel splitting in point-to-point links

Definitions

  • the present invention relates to the field of computer network technologies, and more particularly to a data transmission system and a data transmission method in a computer network.
  • BACKGROUND OF THE INVENTION The development of Internet technology has greatly changed people's work and life. Among them, the emergence of instant messaging technology makes communication between people very convenient. At present, instant messaging tools have become very popular. In addition to meeting the communication of ordinary characters and pictures, instant messaging requires an increasing demand for voice and image communication. Video telephony is the development direction of instant messaging tools.
  • NAT Network Address Traction
  • Many private network users are behind the NAT and connect to the Internet through a router.
  • users cannot communicate directly with each other.
  • the channel can be established by TURN (Troveral Using Relay NAT) technology.
  • the channel established through TURN technology is through third-party transit data, and the third party in the channel can be a server or a normal client.
  • the bandwidth of data transmission between the two sides of the communication service is limited by the bandwidth of the third party.
  • the smaller bandwidth may affect the quality of audio and video communication or the time for file transmission. long.
  • a data transmission method includes the following steps: establishing two or more data transmission channels through a third-party transit node between a service initiator and a service receiver; and transmitting different directions through each of at least two channels respectively Different types of data.
  • a data transmission system includes a data processing module, a channel establishment module, and a channel working module, wherein the data processing module is configured to process data transmitted through a channel, and the channel establishment module is configured to establish two or more third-party relays
  • the channel working module is connected to the channel establishing module and the data processing module, and the channel working module is configured to simultaneously transmit data through at least two channels.
  • FIG. 2 is a schematic diagram of simultaneous transmission of multi-channel data of the first embodiment
  • FIG. 3 is a schematic diagram of simultaneous transmission of multi-channel data of the second embodiment
  • Figure 4 is a block diagram of a data transmission system
  • FIG. 5 is a block diagram of the channel working module. Modes for Carrying Out the Invention The technical solutions of the present invention will be described in detail below with reference to specific embodiments.
  • a data transmission method includes the following steps: between a service initiator and a service receiver Establish two or more data transmission channels through third-party transit nodes; transmit data through at least two of them simultaneously. After the channel is established, the network bandwidth can be increased by simultaneously transmitting data through at least two of the channels.
  • FIG. 1 the specific process of the above method is shown in FIG. 1:
  • step S102 the service originator initiates the request.
  • the request can be a request for a voice chat, a video call, or a file transfer.
  • Step S104 determining whether the service recipient accepts the request. If the service recipient rejects, it returns to step S102, otherwise proceeds to step S106.
  • Step S106 searching for a transit node. Find the corresponding third-party transit node according to the number of channels that need to be established.
  • the third-party transit node can be a server specially built and maintained for data transmission, or a common client that can be found in the network and can be used as a third-party transit node. If you use a normal client, you can avoid the CPU and bandwidth resources of the server.
  • step S108 two or more channels are established.
  • the characteristics of the communication between the two parties that is, the communication between the service initiator and the service receiver, based on the found third-party transit node, establish two or more channels through the third-party transit node between the service initiator and the service receiver.
  • the above two channels can be established by using TURN technology.
  • the number of channels can be determined according to the needs of the service and the network status. For example, when the service requirements are for audio and video communication between the two parties and the network status is very stable, two channels can be established, and the two channels are respectively used as the transmitting service initiator to the service receiver. Data and data from the service receiver to the service initiator.
  • backup channels may be included in more than two channels.
  • the service demand is for audio and video communication between the two parties and the network status is not stable
  • four channels can be established, two of which are used to transmit the data from the service initiator to the service receiver and the data from the service receiver to the service initiator.
  • Two are used as backups for the above two channels.
  • only one backup channel can be established as a backup of the two channels.
  • the number of channels is three.
  • the service initiator is still in the video channel
  • a channel can be established for transmitting the data file.
  • the number of channels is five; of course, a backup channel can also be established for this channel, and the number of channels is six.
  • the number of channels is six.
  • Step S110 performing performance comparison on the established two or more channels. For example, the network delay of the channel and the network packet loss rate are analyzed, and the channel performance is sorted according to each performance indicator.
  • Step S112 data is simultaneously transmitted through at least two channels.
  • the data from the service originator to the service receiver is transmitted in one channel, and the data from the service receiver to the service initiator is transmitted in the other channel.
  • the above classification method is classified according to the transmission direction of the data, and may also be classified and transmitted according to the type of the data. For example, in a video call, since the data amount of the video data is usually large, the video data is transmitted in one channel, and the video is transmitted. Data other than data, such as audio, text, pictures, etc., is transmitted in another channel. And the different types of data may be transmitted in the corresponding channel according to the result of the channel performance comparison in step S110.
  • the data channel with low network delay is preferentially allocated to the audio data, and the network packet loss rate is low.
  • the channel is assigned to the video data to use. Please refer to Figure 2 at the same time. Take video call as an example. In order to achieve better video call performance, use the interactivity of data in audio and video communication, and set the number of channels to eight. The role of each channel is as follows:
  • the backup table of channel 6 there are four channels for transmitting data at the same time.
  • the sum of the bandwidths of the four channels is usually larger than the bandwidth of a single channel. Therefore, compared with the case of transmitting data through a single channel, The total bandwidth of the data transmission.
  • the number of third-party transit nodes is the same as the number of channels and - correspondingly, each channel passes its corresponding transit node. In other embodiments, more than two channels can be used to pass the same transit node. .
  • the bandwidth added by more than two channels of the same transit node relative to a single channel is usually limited; and each channel is passed through its own transit node, which can greatly increase the total bandwidth of data transmission.
  • data is transmitted in different channels according to the type of data and the direction of transmission: (1) Different types of data are transmitted in different channels according to different data types.
  • the audio data and the video data are transmitted in different channels. In this case, even if the channel for transmitting the video data is interrupted or invalid, the audio data can still be transmitted to the other party, preventing the communication completely. Interrupted.
  • the audio data and the video data are respectively transmitted in different channels, and the data channel with low network delay is allocated to the audio data, which can reduce the occurrence of the sound delay; and allocate the channel with low network packet loss rate to the video data.
  • the data from the initiator to the receiver and the receiver to the initiator can be transmitted in different channels. In this case, even if the transmission in one direction is interrupted, only one will be affected. In the direction of data transmission, the other direction can still communicate normally.
  • the backup channel has the same number of channels (hereinafter referred to as transmission channels) that normally transmit data, so that the backup channel has a one-to-one correspondence with the transmission channel.
  • the number of backup channels and transmission channels can also be different.
  • the backup channel and the transmission channel corresponding to the backup channel may have the same attributes, for example, the channel type is the same: both are UDP (User Datagram Protocol) channels or TCP (Transmission Control Protocol) channels.
  • Channel performance network delay, network packet loss rate, etc.) is the same or similar: The channel with low network delay is used as the backup channel of the audio transmission channel, and the channel with low network packet loss rate is used as the backup channel for the video transmission channel.
  • step S114 it is checked whether the channel is invalid. Due to the complexity of the network, the reliability is not high. By checking, it can be judged whether the channel is invalid (step S116).
  • the channel check can determine the period and mode of the check according to the network conditions. For example, if the network condition is not good, the inspection cycle can be shortened and all channels, including the transmission channel and the backup channel, can be checked to avoid the backup channel failing when the transmission channel fails. Unchecked; If the network is in good condition, you can extend the inspection period and check only the transmission channel, because in the case of good network conditions, the possibility of the backup channel failing in the case of a failure of the transmission channel is small. If the failed channel is detected, it proceeds to step S118.
  • Step S118 replacing the failed channel.
  • step S114 if it is checked that the failed channel is a transmission channel, the backup channel corresponding to the transmission channel established during the establishment of the channel is enabled to replace the failed transmission channel to transmit data. After the channel replacement is complete, a new backup channel needs to be created to enable the new backup channel when the replaced channel fails again.
  • step S114 if it is checked that the failed channel is a backup channel, a new backup channel is established and channel replacement is performed, and the failed backup channel is replaced with a new backup channel.
  • step S116 If the channel failure condition is not checked in step S116, the process proceeds to step S120 to determine whether the service is finished, for example, whether the video call is completed. If not, the process returns to step S112, otherwise the process ends.
  • the data is simultaneously transmitted through at least two channels, and the network bandwidth is increased; according to the audio and video data transmission requirements, the channel is selectively allocated for transmission.
  • the same type of data so that users get a better experience, such as the method of separating audio and video, can reduce the occurrence of sound delay, and the image quality can be improved; using the backup channel mechanism, fast switching when the transmission channel is abnormal, no need Re-search for third-party transit nodes and establish channels to reduce the impact of channel failures on users.
  • the number of channels can be reduced to four, and the functions of each channel are as follows:
  • Channel 1 is mainly used to transmit data from the originator to the receiver;
  • Channel 2 is mainly used by the receiver of the service to transmit data to the service initiator.
  • the difference between the two channels is that the data in different directions is transmitted, and the video data is no longer further subdivided according to the data type.
  • the data type can also be text information, pictures, various data files, and the like.
  • the purpose of setting channels 3 and 4 is to make backups for channels 1 and 2, respectively, to enhance the high availability of the service. When channel 1 is unavailable, it is replaced by channel 3, which ensures the data transmission from the initiator to the receiver. Also when channel 2 is not available, replace it with channel 4.
  • a data transmission system 400 in which both the service originator and the receiver are provided with a data transmission system 400.
  • the originator's data transmission system coordinates with the receiver's data transmission system to find a third-party transit node and establish a data transmission channel.
  • the data transmission system 400 includes a data processing module 402, a channel establishment module 404, a channel working module 406, and a channel checking module 408.
  • the data processing module 402 is coupled to the channel work module 406 for processing data transmitted over the channel. For example, the data packet to be sent is sent to the channel working module 406, and is sent by the channel working module 406; the received data packet is processed to obtain the payload data, and further, the data can be decoded, audio and video synchronization, etc. deal with.
  • the channel establishment module 404 is connected to the channel working module 406 for finding the transit node and establishing two or more channels through the third-party transit node to establish a data connection path between the service initiator and the service receiver.
  • the third-party transit node can be either a server or a normal client. If you use a normal client, you can avoid the CPU and bandwidth resources of the server.
  • the channel established by the channel establishment module 404 includes a transmission channel for transmitting data, and a backup channel serving as a backup of the transmission channel, replacing the transmission channel when the transmission channel becomes unavailable. Among them, the backup channel can be established before the data is transmitted, or can be established during the process of transmitting data after the transmission channel is established, because the possibility of invalidation immediately after the transmission channel is established is low.
  • the channel working module 406 is connected to the channel establishing module 404, the data processing module 402, and the channel checking module 408, respectively.
  • the channel work module 406 is configured to simultaneously transmit data through at least two of the channels established by the channel establishment module 404.
  • the channel working module 406 transmits the data packet formed by the data processing module 402 through one of the channels, and receives the data packet sent by the working channel module of the other channel through another channel by utilizing the interaction between the two parties in the data transmission.
  • the above classification method is classified according to the transmission direction of the data, and the channel working module 406 can also perform classification transmission according to the type of the data, for example, the video data is transmitted in one channel, and the data other than the video, such as audio, text, picture, and the like. Transfer in another channel.
  • the channel working module 406 can also compare the channel performance, and combine different channel types of data in the corresponding channel according to the channel performance and the data type. For example, the audio data is transmitted in the data channel with low network delay, and the video data is lost in the network. Transmission in a channel with a low packet rate. In a preferred embodiment, data transmission is performed by considering both the direction of data transmission, the type of data, and the performance of the data channel, that is, the direction and the data are combined in the transmission process. The type is transmitted in the corresponding channel.
  • the channel check module 408 is used to periodically check the status of each channel to determine whether the channel has failed.
  • the channel work module 406 replaces the failed channel with the backup channel established by the channel setup module 404 when the channel check module 408 checks for the failed channel.
  • the channel working module 406 includes a data direction analyzing unit 416, a data type analyzing unit 426, and a channel performance analyzing unit 436.
  • the data direction analyzing unit 416 receives the data packet formed by the data processing module 402 and the data packet in the channel, and analyzes the data transmission direction according to the address information in the data packet, thereby determining which channel to transmit according to the data transmission direction. For example, when a video call is made by three parties, different data packets are generated and sent to two receivers respectively. At this time, the data direction analyzing unit 416 obtains the data transmission direction according to the address information in the data packet.
  • the data type analyzing unit 426 receives the data packet formed by the data processing module 402, and analyzes the type of the data, such as audio data, video data, text data, image data, and other file data, etc., in the process of selecting a channel according to the data type. use.
  • the channel performance analysis unit 436 is used to compare the performance of the above two channels to obtain the performance of the channel, such as the network delay of the channel and the network packet loss rate.
  • data is simultaneously transmitted through at least two channels, thereby increasing network bandwidth; according to audio and video data transmission requirements, channels are selectively allocated for transmitting different types of data, so that users get a better experience.
  • the method of separating audio and video can reduce the occurrence of sound delay, and the image quality can be improved.
  • the backup channel mechanism is used to quickly switch when the transmission channel is abnormal, and it is not necessary to re-search for a third-party transit node and establish a channel. The impact of channel failure on the user.

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

Abstract

La présente invention concerne un procédé de transmission de données qui comprend les étapes suivantes : l’établissement de plus de deux canaux de transmission de données passant par un nœud de transfert tiers entre un demandeur de service et un destinataire de service; et transmission simultanée de données par au moins deux des canaux. Dans le procédé de transmission de données, l’adoption d’au moins deux canaux pour une transmission de données simultanée peut augmenter la bande passante de réseau. De plus, l’invention concerne également un système de transmission de données qui comprend un module de traitement de données, un module d’établissement de canal et un module de fonctionnement de canal.
PCT/CN2009/074024 2008-09-26 2009-09-18 Système et procédé de transmission de données WO2010037318A1 (fr)

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CN2008101987975A CN101360054B (zh) 2008-09-26 2008-09-26 数据传输系统及数据传输方法
CN200810198797.5 2008-09-26

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CN114253124A (zh) * 2021-12-22 2022-03-29 浙江中控技术股份有限公司 一种高可用性热备冗余系统及方法
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CN102457563A (zh) * 2010-10-25 2012-05-16 和硕联合科技股份有限公司 数据传输控制模块及网络数据传输装置、系统与方法
CN103581605A (zh) * 2012-08-01 2014-02-12 腾讯科技（深圳）有限公司 视频通话的多屏互动方法及视频通话中转装置
CN103970691A (zh) * 2013-01-24 2014-08-06 宏碁股份有限公司 电子装置及其数据处理方法
CN104333727B (zh) * 2013-07-22 2019-04-12 腾讯科技（深圳）有限公司 音视频传输通道调控方法、装置和系统
CN104010032B (zh) * 2014-05-21 2018-04-10 北京九华互联科技有限公司 一种数据传输方法及装置
CN105282564A (zh) * 2015-10-22 2016-01-27 武汉兴图新科电子股份有限公司 一种复杂网络结构中保证媒体流通畅的方法
CN106027492A (zh) * 2016-04-29 2016-10-12 努比亚技术有限公司 一种数据传输终端及方法
CN105959613A (zh) * 2016-05-27 2016-09-21 山西百得科技开发股份有限公司 数字会议设备和系统
CN112866178B (zh) * 2019-11-27 2023-09-05 北京沃东天骏信息技术有限公司 音频数据传输的方法和装置
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