WO2010037318A1 - Data transmission system and data transmission method - Google Patents

Data transmission system and data transmission method 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
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Patent type
Prior art keywords
channel
data
data transmission
channels
module
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Application number
PCT/CN2009/074024
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French (fr)
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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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/12Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16Arrangements 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
    • H04L1/18Automatic repetition systems, e.g. van Duuren system ; ARQ protocols
    • H04L1/1829Arrangements specific to the receiver end
    • H04L1/1854Scheduling and prioritising arrangements
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L2001/0092Error control systems characterised by the topology of the transmission link
    • H04L2001/0096Channel splitting in point-to-point links

Abstract

A data transmission method is disclosed, which includes the following steps: establishing more than two data transmission channels passing through a third party transfer node between a service initiator and a service receiver; and simultaneously transmitting data through at least two of the channels. In the data transmission method, the adoption of at least two channels for simultaneous data transmission can increase the network bandwidth. In addition, the invention also provides a data transmission system, which includes a data processing module, a channel establishing module and a channel working module.

Description

Data transmission system and data transmission TECHNICAL FIELD The present invention relates to computer network technology, and in particular a data transmission system and data transmission method in a computer network. Background of the Invention development of Internet technology has greatly changed the way people work and life. Among them, the advent of instant communication technologies make communication between people has become very convenient. At present, the instant messaging has been very popular, in addition to instant messaging users to meet ordinary text, picture outside the exchange, the demand for voice, image exchange is also increasing. Video phone is the development direction of the instant messaging tool.

Internet-based instant messaging technology with other technologies, faced with the problem of IP address shortage. In order to solve the problem of shortage of IP addresses, network address translation (NAT, Network Address Traslation) technology widely used. Many private users are located behind NAT, connect to the Internet through a router. In some special cases, direct communication can not, at this time may be established by means of the channel TURN (Traversal Using Relay NAT) techniques between users.

TURN channel established through technology transfer data through a third party, third-party channels may be a server, it can be an ordinary client. However, the communication service data transmission bandwidth is limited by the third parties bandwidth for audio and video communications, or a large amount of data file transfer, the less bandwidth will affect the quality of audio and video communication or file transfer over the time long. SUMMARY In view of this, it is necessary for smaller transit through a third-party data service both the data transfer bandwidth issues, to provide a data transmission method.

Further, there is provided a data transmission system.

To solve the above problem, the following technical solutions:

A data transmission method, comprising the steps of: establishing a service between the initiator and the recipient two or more services via a data transmission path of a third party relay node; wherein simultaneously by at least two different transmission channels each channel or direction different types of data.

A data transmission system comprising a data processing module, and a passage channel establishing module operating module, the data processing module for processing data transmitted through the channel, said channel establishing means for establishing two or more transit through a third party node a channel establishing module and the operating module are connected to the data processing module channel, wherein said channel means for transmitting working data via the at least two channels simultaneously.

The above-described data transmission method and system, using at least two channels simultaneously to transmit data bandwidth can be increased. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a flowchart of a data transmission method;

Figure 2 is a schematic view of a first embodiment of the multi-channel data transmission simultaneously;

3 is a schematic view of a second embodiment of the multi-channel data transmission simultaneously;

4 is a block diagram of a data transmission system;

FIG 5 is a block diagram illustrating operation of the module channel. The following embodiments of the invention The technical solution of the present invention will be described in detail with reference to specific embodiments. A data transmission method comprising the steps of: establishing a service between the initiator and the recipient two or more services via a data transmission path to third relay node; wherein the at least two channels simultaneously by transmitting data. After the channel is established, at least two channels through which simultaneous transmission of data may increase network bandwidth.

In one particular embodiment, the specific procedure of the above method shown in Figure 1:

In step S102, the service initiation request initiator. The request may be a voice chat, video or file transfer request.

Step S104, it is determined whether the receiver accepts the service request. If the service recipient refused, then return to step S102, otherwise to step S106.

Step S106, to find transit node. Finding appropriate third-party transit node based on the number of channels need to be established. Among them, the third-party transit node can be both a server dedicated to data transfer and the establishment and maintenance of, the network may also be possible to find a common client can be used as a third-party transit node. If a normal client, avoid consuming server's CPU and bandwidth resources.

Step S108, the establishment of two or more channels. Use of communications parties that features interactive business originator and recipient of data transmission services, according to find third-party transit node, transit node through a third party to establish two or more channels between business and business initiator recipient. Two or more channels can be established using the above-described technique TURN. The number of channels can be determined based on the needs and status of network services, such as business requirements for both audio and video communications and network conditions are very stable, you can create two channels, two channels are used as the initiator transfer business to business recipient receiving data and business data traffic originating party to party. Further, two or more channels may be included in the backup channel. Such as business needs for both audio and video communications network condition is not stable and can establish four channels, two of which are used as data transmission services and the initiator to the recipient the recipient service traffic to data traffic originating party, the other two were used as a backup of the above-described two channels. Of course, the smaller the probability of simultaneous failure of two channels can be established only in the case of a backup path as a backup of the above-described two channels, this time, the number of channels is three. On the basis of the above four channels, if the service is still the initiator of the video communication simultaneously transmit a data file to the receiver, a channel can be established for transmitting data for this file again, this time, the number of channels is five; course can also create a backup channel for this channel, the channel number is six.

Step S110, the two or more channels established for performance comparison. For example, the network delay of the channel, network packet loss ratio analysis of channel performance and the performances of the sort.

Step S112, the data is simultaneously transmitted through at least two channels. For example, the service initiator to the recipient data service in a transmission channel, and the service recipient to the initiator is data traffic transmitted in the other channel. Classification based on the above-described data transfer direction is classified, may be classified according to the type of transmission data, e.g., video call, since the amount of video data is usually large, a video data transmission path, and the video data other than, for example, audio, text, images and other data transmission in the other channel. And may be the result of performance comparison of different channel step S110 in the respective types of data transmission channel, for example, in a video call, a low latency network data path preferentially allocated to the audio data, the network packet loss rate the channels are assigned to the video data use. Please also refer to FIG. 2, a video call, for example, in order to achieve good call quality video, audio and interactive video communications using the data, the number of channels is set to 8, the role of each channel in the following table:

Backup channel No. 75

The 8th 6 on the backup channel in the table, while the channels for data transmission there are four in the same network, the bandwidth of the four channels and is generally greater than the bandwidth of a single channel, and therefore, with respect to the case by a single channel transmission data and improve total bandwidth data transfer. In FIG. 2, the same number of channels relay node and the third party - correspond to each channel through relay node corresponding thereto, in other embodiments, the two or more channels by the same manner as the relay nodes may be employed . Two or more channels by the same relay node with respect to the single channel bandwidth is generally increased limited; the use of each channel by way of a respective relay node, can greatly increase the overall data transmission bandwidth.

Table, while the direction and the type of transmission data in the transmission data in different channels: (1) according to different data types, the different types of data in different transmission channels. In particular, during a video call, the audio data and video data transmission in different channels, in this case, even if the video data channel transmission interruption or failure, the audio data can still be transmitted to the other side, completely prevent communication interrupted. It is also possible to select the type of data transmitted according to the data type channel adapted to optimize transmission performance. For example, audio data and video data are transmitted in different channels, low latency network data channels are assigned to the audio data, the sound can reduce the occurrence of delays; assigning the network packet loss rate of the channel used for video data, the image quality can be improved. (2) different from the direction of transmission, the originator to the recipient may be the recipient of the data transfer initiator in different channels, in this case, even if the transmission is interrupted in one direction, it will only affect one data transmission, the other direction can still be normal communication.

In the table, the normal channel and the backup channel for transmitting data (hereinafter, referred to a transmission channel tube) the same amount, so that the backup channel and the transmission channel correspondence. Of course, the number of backup channels and the transmission channel may be different, for example, in the case where the network state is better, the table can be omitted, channel 4, channel 3 as the backup transmission channel 1 and channel 2. Similarly, the channel 8 may be omitted. Further, a backup channel to the backup channel corresponding to the transmission channel may have the same attributes, e.g., the same channel type: are UDP (User Datagram Protocol, User Datagram Protocol) channel or TCP (Transmission Control Protocol, Transmission Control Protocol) channel and the like; channel performance (network delay, the network packet loss rate, etc.) are the same or similar: a low latency network channel audio transmission channel as a backup channel, while the network packet loss rate of the channel as a backup channel video transmission channel.

Step S114, to check whether the failed channel. Due to the complexity of the network, which leads to high reliability is not, by checking whether the failed channel can be determined (step S116). Checking channel conditions may be determined according to the network mode and check period, e.g. poor network conditions, the check period can be shortened and check all channels, including the transmission channel and a backup channel, to avoid backup channel transmission path failure occurs, but also failure not check out the situation; if the network is good, it can be appropriate to extend the inspection period and inspection only transmission channels, as in the case of the network is good, the less likely case of the transport channel is also expired backup path failure. If the channel fails to check, then proceeds to step S118.

Step S118, replaces the failed channel. In step S114, check if the channel is a transmission channel failure, will be established in the process of establishing a transmission channel with this channel corresponding to the backup channel is enabled to replace the failed transmission channels to transmit data. After the completion of the replacement channel, we need to create a new backup channel to channel when the case after the failure occurs again, replace the opening of the new backup channel. In step S114, if a failure is checked channel is a backup channel, to create a new channel and backup channel replaced with a new backup path alternative expired backup channel.

If, in step S116, the case where there is no channel to check failure, the process proceeds to step S120, the service end judging whether, for example, whether the video call is finished, and if not ended, returns to step S112, otherwise the process ends.

The above-described data transmission method, the at least two channels simultaneously to transmit data, increased bandwidth; audio and video data transmission according to claim selective channels will be allocated for different types of data transmission, so that a better user experience, the separate audio and video, for example, a method can reduce the occurrence of delayed sound, and the image quality can be improved; backup channel mechanism employed to quickly switch abnormality in the transmission path, to find a third party without re-established relay node and channels, reducing the channel impact on the user's failure.

The above-described embodiment, shown in Figure 3, if the press does not distinguish between data channels of different types of data transmission, the number of channels can be reduced to four, the role of each channel in the following table:

No. 1 channel is mainly used for transmitting traffic data to the initiator recipient; the recipient service channel 2 is mainly used to transmit data traffic originating party. The difference between these two is that the different data channels in the direction of transmission, no data type is audio data that the video data is further subdivided further, of course, the data type may also be text messages, pictures, various types of data files. Set channel 3 and 4 channel object, respectively, to channel 1 and channel 2 for backup, enhanced high availability services. When the No. 1 channel is not available, to replace the channel 3, ensuring the originator to the recipient of the data transmission. Also when the number of unused channels 2, channel 4 is replaced.

As shown in FIG 4, it is also provided a data transmission system 400, traffic originating and recipient have a data transmission system 400. When performing data transmission, data transmission systems data transmission systems and coordination of recipient initiator look for third-party transit node and the establishment of channels of data transmission.

The data transmission system 400 includes a data processing module 402, a channel establishing module 404, the channel 406 and the operating module checks the channel module 408. The data processing module 402 and the passage 406 is connected to the operating module, for data transmitted over the channel for processing. For example, data to be transmitted into packets to channel operating module 406, a transmission module 406 working channel; packet data obtained by processing the received payload data, and further, can also decode the data, audio and video synchronization deal with.

Channel establishing module 404 is connected to the channel operating module 406, for finding the relay node and the third party to establish two or more channels by the relay node, to establish a data connection path and the service business initiator recipient. Third-party transit node can be either a server or an ordinary client. If a normal client, avoid consuming server's CPU and bandwidth resources. Channel establishing module 404 to establish a channel comprising a transmission channel and a backup channel, wherein the transmission channel for transmitting data, and the backup transmission path as a backup path, the transmission path becomes unavailable alternative transmission channel. Wherein the backup channel may be established before data transmission can be established in the process of transferring data after the establishment of transmission channels, since the transmission path establishing a lower likelihood of failure immediately.

Channel module 406 and the work channel establishing module 404, data processing module 402 and the passage 408 is connected to the check module. Operating module 406 for establishing a channel to transmit data channel module 404 to establish at least two channels simultaneously through the passage. Using both interactive communication in data transmission, a data packet channel operating module 406 consisting of the data processing module 402 wherein a transmission channel by channel and other operating module receiving data packets transmitted over a channel by another. The above-described classification is classified based on the data transfer direction, the channel operating module 406 may be carried out according to the type of data classification transmission, for example, video data transmission in a channel, and the data other than video, such as audio, text, pictures and other data transmission in the other channel. Channel operation module 406 may also be on the channel performance comparison, the binding channel performance data type different types of data transmission in the relevant channel, for example, audio data, low latency data channel transmitted in the network, the video data lost in the network low packet transmission channel. In a preferred embodiment, taking into account the direction of data transfer, the performance data type and data channels for data transmission, i.e. during both the transmission direction and type of binding points of the respective data transmission channel.

Channel state checking module 408 periodically checks for respective channels to determine whether the failed channel, the channel module 406 replaces the failed working channel using channel establishing module 404 to establish a backup path at the time of checking module 408 checks the channel to channel failure.

More specifically, as shown in FIG 5, operating module 406 includes a data channel direction analyzing unit 416, the data type analyzing unit 426 and analysis unit 436 channel performance.

Direction data packets of the packet analysis unit 416 and the channel processing module 402 receives data consisting of, in accordance with the address information in the packet transport direction of data analysis, to determine which channels transmitted by the data transfer direction. For example, when the three-way video call, generate different data packets are sent to both the recipient, then the data analysis unit 416 stars the direction of the conveying direction of the address information of the data packet.

Packet data type analyzing unit 426 receives the data processing module 402 consisting of the type of analysis obtained data, such as audio data, video data, text data, image data and other data files, to be selected according to the data type of the channel during use.

Channel performance analysis unit 436 for the performance comparison of the two or more channels to obtain channel properties such as path delay network, the network packet loss rate performance.

In the above-described data transmission system 400, through at least two channels simultaneously to transmit data, increased bandwidth; audio and video data transmission according to claim selective channels will be allocated for different types of data transmission, so that a better user experience , for example, a method of separating audio and video, the audio delay occurrence can be reduced, and image quality can be improved; backup channel mechanism employed to quickly switch abnormality in the transmission path, to find a third party without re-relay node channel and the establishment ^, impact on the user's channel failure. ,,, Eight,,;,,, and in detail, but it can not therefore be understood as limiting the scope of the present invention. It should be noted that those of ordinary skill in the art, without departing from the spirit of the present invention, can make various changes and modifications, which fall within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

Claims
1. A data transmission method, wherein the method comprises the steps of: establishing at least two third parties via a data transmission path between the relay node and the service business initiator receiver;
r different directions or different types of data.
2. The data transmission method according to claim 1, wherein said establishing the data transmission channel by two or more third party relay node comprises:
Finding a third party relay node, the relay node number of the third party and the number of the same two or more channels and - correspond to each channel by the third party relay node corresponding thereto.
3, the data transmission method according to claim 1, characterized in that the recipient of the transmission data service traffic direction initiates the service reception direction initiator transmitted service data transmission in the different channels.
4, the data transfer method according to claim 1 or claim 3, wherein the data transmission for the video call data, the audio data in the video call with the video data in different data transmission channels.
5. The data transmission method according to claim 13, characterized in that, further comprising the step of comparing the performance of two or more of said channels, said step of transmitting data according to a result of performance comparison of different channel type of data transfer at the input channels adapted type
6. The data transmission method as claimed in claim 5, wherein the low-delay audio data channels transmitted in the network, and / or video data input in the transmission channel of the network packet loss rate
7, the data transmission method according to claim 1, wherein the two or more channels comprises a backup channel, the method further comprising:
Channel status check step, and after checking the channel failure, replacing the failed channel using the backup channel.
8, the data transmission method according to claim 7, characterized in that the data transmission channel to the backup channel corresponding to the backup channel has the same properties.
9. A data transmission system comprising a data processing module, the data processing module is configured to transmit data through channel processing, wherein said data transmission system further comprises a passage channel establishing module and the operating module,
The working channel module coupled respectively to said channel establishing module, and a data processing module, said channel establishing means for establishing two or more channels by the transit node, a third party; means for working the passage therethrough of at least two channels At the same time transmit data.
10, according to the data transmission system according to claim 9, characterized in that said channel establishing module establishes two or more channels included in the backup channel.
11. The data transmission system according to claim 10, characterized in that the system further comprises a channel check module,
The channel check module connected to the module working channel, the channel check means for checking each channel of the channel to determine whether the failure,
Using the backup channel replacing the failed working channel when said channel check module failed channels in the channel to check module.
12, according to the data transmission system according to claim 9, wherein said working channel module wherein a transmission data channel, and receives the data through another passage.
13, a data transmission system according to claim 9 or claim 12, wherein said channel further comprises means for operating module performance of two or more channels of said comparison, the performance comparison based on the results of the transmission channel and for an select the appropriate type of data channel transmission data block.
14. The data transmission system according to claim 13, wherein said low-delay channel module working channel audio data is transmitted over the network, through the transmission channel packet loss rate of video data.
PCT/CN2009/074024 2008-09-26 2009-09-18 Data transmission system and data transmission method WO2010037318A1 (en)

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