WO2011088768A1 - Data transmission method and system, terminal thereof - Google Patents

Abstract

A data transmission method is provided in the present invention. The method includes the following steps: A. receiving a data resource issuing request issued by a data resource issuing terminal, and notifying the downloading terminals according to the request (S10); B. according to the notification, establishing the network connections between the data resource issuing terminal and each downloading terminal, and the network connections among the downloading terminals (S20); C. establishing the broadcast channels according to the network connections (S30); D. establishing the data links according to the established broadcast channels, and transmitting the data resources via the data links (S40). Furthermore, a data transmission system and terminal are also provided. The data transmission method, system and terminal can decrease the bandwidth cost, will not have errors due to the breakdown of one broadcast channel, and can also decrease the bit error rate.

Description

Data transmission method and system, terminal

 [Technical Field]

 The present invention relates to the field of the Internet, and in particular, to a data transmission method and system, and a terminal.

 【Background technique】

Data on the network transmission sometimes has the characteristics of strong real-time, large amount of data per unit time, and continuous data. In response to these characteristics, the traditional technology generally uses the method of server transfer to transmit data. The transit server receives the data published by the data publisher and then forwards it to each of the connected terminals according to a specific rule. Because the data needs to be transferred through the server, and the data is massive data, the server needs to have a very high upload and download bandwidth, and as more terminals are accessed, the required bandwidth is higher, and the higher the cost, when the terminal accesses After a certain threshold is reached, the entire system will not work normally; if the data of the publishing terminal is lost, the remaining terminals will also lose packets, resulting in a higher bit error rate.

 [Summary of the Invention]

 Based on this, it is necessary to provide a data transmission method capable of reducing cost and bit error rate.

 A data transmission method includes the following steps:

 A. Receiving a data resource publishing request issued by the data resource publishing terminal, and notifying the downloading terminal according to the request;

 B. Establishing, according to the notification, a network connection between the data resource publishing terminal and the download terminal and between the download terminal;

C. Establishing a broadcast channel according to the network connection;

D. Establishing a data link according to the established broadcast channel, and transmitting data resources through the data link.

 Preferably, said step A The method further includes the step of transmitting data resource information and including a list of terminal information of the data resource issuing terminal and the download terminal to the download terminal.

 Preferably, after step C, the step of correcting the established broadcast channel according to the quality of the broadcast channel is further included.

Preferably, the elements of the quality of the broadcast channel include bandwidth, download percentage, whether it is in use, packet loss impact, local area network redundancy data, and broadcast request rejection time;

The method further includes: setting a threshold and a weight of the broadcast channel quality element, calculating a score of the quality of the broadcast channel according to the weight, determining whether the score is lower than the threshold, and if so, disconnecting Said the broadcast channel.

 Preferably, said step D The step of transmitting data resources through the data link further includes: collecting data resources by the data publishing terminal, buffering the data resources, and dividing the buffered data into different segments, and distributing the data to the broadcast channel; and the data resource publishing terminal and the And after the download terminal acquires the broadcasted data resource, buffers, and broadcasts the buffered data resource to the terminal connected to the terminal, and plays the buffered data resource.

Preferably, the method further comprises the step of: querying whether the data resource acquired by the download terminal is missing, and if so, searching for the terminal containing the missing data resource and requesting the broadcast channel.

 In addition, it is necessary to provide a data transmission system that can reduce cost and bit error rate.

A data transmission system, the system includes a terminal and a terminal management server, the terminal includes a data resource publishing terminal and a download terminal, and the data resource publishing terminal is configured to send a data resource publishing request to the terminal management server; The terminal management server is configured to receive a data resource publishing request and send a notification to the download terminal; the download terminal receives the notification and establishes a network connection between the data resource publishing terminal and each download terminal and between the download terminals, according to The network connection establishes a broadcast channel; the terminal establishes a data link according to the broadcast channel, and transmits the data resource through the data link.

 Preferably, the terminal management server is further configured to send the data resource information and the terminal information list of the terminal to the download terminal.

Preferably, the data resource issuance terminal is further configured to buffer the data resource, and divide the buffered data into different segments and allocate the data to the broadcast channel; the terminal obtains the broadcasted data resource and buffers the data. The buffered data resource is broadcast to a terminal connected to the terminal, and the buffered data resource is played.

 Preferably, the data resource issuance terminal and / Or the download terminal is further configured to send a broadcast channel request command, and establish a data link between the terminals after receiving the feedback channel information of the broadcast channel request command.

Preferably, the download terminal is further configured to query whether the downloaded data resource in the buffer is missing, and if so, find the terminal that contains the missing data resource and issue a request for the broadcast channel.

 Preferably, the download terminal may also correct the established broadcast channel according to the quality of the broadcast channel.

Preferably, the elements of the quality of the broadcast channel include bandwidth, download percentage, whether it is in use, packet loss impact, local area network redundancy data, and broadcast request rejection time;

The download terminal is further configured to set a threshold and a weight of the broadcast channel quality element, calculate a score of the broadcast channel quality according to the weight, determine whether the score is lower than the threshold, and if yes, disconnect The broadcast channel.

 In addition, a terminal is also provided.

 A terminal comprising:

 a communication module, configured to send a data resource publishing request and receive a notification sent by the terminal management server according to the data resource publishing request;

 a broadcast channel establishing module, configured to establish a network connection between the terminals, and establish a broadcast channel according to the network connection;

 a data link establishing module, configured to establish a data link according to a broadcast channel;

 And a transmission module, configured to perform data resource transmission by using the data link.

 Preferably, the communication module is further configured to receive data resource information and a terminal information list.

Preferably, the method further includes a buffering module, configured to buffer the published data resource, and divide the buffered data resource into different segments, and transmit the data to the broadcast channel by using the transmission module; Receiving the downloaded data resource and transmitting it to the buffer module for buffering; the transmission module will buffer the released data resource and / or the downloaded data resource is transmitted to the terminal connected to the terminal.

 Preferably, a play module is further included, and the play module plays the buffered data resource.

Preferably, the communication module is further configured to send a broadcast channel request command and receive feedback channel information of the broadcast channel request command; the data link establishing module, after the communication module receives the feedback channel information of the broadcast channel request command, Establish a data link between each terminal.

Preferably, the method further includes a verification module, configured to query whether a data resource downloaded in the buffer module is missing, and if yes, the verification module searches for a terminal that contains the missing data resource, and passes the communication module. Issue a request that requires a broadcast channel.

 Preferably, a correction module is further included, wherein the correction module is configured to correct the established broadcast channel according to the quality of the broadcast channel.

Preferably, the elements of the quality of the broadcast channel include bandwidth, download percentage, whether it is in use, packet loss impact, local area network redundancy data, and broadcast request rejection time;

The correction module is further configured to set a threshold and a weight of the broadcast channel quality element, calculate a score of the broadcast channel quality according to the weight, and determine whether the score is lower than the threshold, and if yes, the broadcast The channel establishment module disconnects the broadcast channel.

The data transmission method, system, and terminal notify the download terminal according to the received data resource release request, and establish a network connection between the data resource issuance terminal and each download terminal and each download terminal according to the notification, and establish a broadcast channel according to the network connection, according to the The broadcast channel establishes a data link and transmits data resources through the data link, so that the data resource is transmitted by using multiple broadcast channels, the bandwidth cost is reduced, and no error occurs due to a problem in one broadcast channel, and the bit error rate is generated. Also reduced.

 In addition, buffering data resources makes data resource transfer faster and saves time.

 Correcting the broadcast channel can improve the effective utilization of the broadcast channel.

 [Description of the Drawings]

 1 is a flow chart of a data transmission method in an embodiment;

 2 is a flow chart of a data transmission method in another embodiment;

 3 is a schematic structural diagram of a data transmission system in an embodiment;

 4 is a schematic diagram showing the operation of a data transmission system in an embodiment;

 Figure 5 is a timing chart showing the operation of the data transmission system in one embodiment;

 6 is a schematic structural diagram of a terminal in an embodiment;

 FIG. 7 is a schematic structural diagram of a terminal in another embodiment.

 【detailed description】

 As shown in FIG. 1, in one embodiment, a data transmission method includes the following steps:

 Step S10: Receive a data resource publishing request issued by the data resource publishing terminal, and notify the download terminal according to the request.

In one embodiment, the data distribution terminal is used to send a release data request to the terminal management server. After receiving the request, the terminal management server notifies the download terminal, and simultaneously sends the data resource information and the terminal information list of the terminal to the download terminal. The data resource refers to the specific data content that needs to be transmitted, such as the played video content; the data resource information refers to some attribute information of the data resource content, such as the identification number, play position, encoding format, etc. of the data resource; Refers to the information of each terminal recorded by the terminal management server, in the form of a list, such as the identification number of the terminal, IP address, etc.

The data resource takes the transmission of the audio and video data in the chat room as an example. The audio and video data in the chat room is different from the ordinary file download, and has certain requirements for real-time performance. By buffering a piece of audio and video data, a piece of data is stored, and then The small piece of data is downloaded as a file to each of the other terminals. In order to facilitate the management of the audio and video data in the chat room, the data resource information includes the resource identification number, the play position, the encoding format, the playing section number, the room identification number, and the like for the particularity of the chat room.

 Step S20 And establishing a network connection between the data resource issuance terminal and each download terminal and between the download terminal according to the notification. The network connection can be a direct connection or a connection through a relay server.

In one embodiment, after receiving the notification, the other terminals establish a direct network connection between the terminals; the terminals that cannot connect with other terminals are connected to the transit server, so that the entire network establishes a connection.

 Step S30, establishing a broadcast channel according to the network connection.

In an embodiment, after the broadcast channel is established, the established broadcast channel can also be corrected according to the quality of the broadcast channel, so that a suitable download source can be better found, and the redundant broadcast channel can be deleted. The factors affecting the quality of the broadcast channel include bandwidth, download percentage, whether it is in use, packet loss impact, LAN redundant data, broadcast request rejection time, and the weights of these elements are successively decremented. According to these values, the broadcast channel can be performed. Rating, if the score is below a certain threshold, you need to disconnect the broadcast channel and try to connect to the broadcast channel of other terminals. This threshold can be set by the user as needed or the default value can be used.

The specific steps of correcting the broadcast channel are: setting a threshold and a weight of the broadcast channel quality element, calculating a score of the quality of the broadcast channel according to the weight, determining whether the score is lower than the threshold, and if so, disconnecting the broadcast channel.

 Step S40: Establish a data link according to the established broadcast channel, and transmit the data resource through the data link.

In an embodiment, according to the established broadcast channel, the download terminal sends a broadcast channel request command to the terminal connected thereto, and after receiving the feedback channel information of the broadcast channel request command, the data is established between the terminal connected to the download terminal. A link transmits data resources through the established data link. The broadcast channel request command includes a resource identification number, a obtained broadcast channel, and a broadcast channel that needs to be acquired. The channel information includes whether the maximum number of connections is exceeded, whether there is resource data, and the number of channels that can be broadcast. After the broadcast channel is established, each broadcast channel can be connected to multiple terminals, which can effectively transmit data resources from different broadcast channels until each connected terminal in the network is filled. A terminal that receives a certain segment data resource broadcasts the certain segment data resource to other terminals.

In addition, the step of transmitting the data resource through the data link further includes the steps of: collecting the real-time data resource by the data resource publishing terminal, buffering the data resource, and then dividing the buffered data resource into different segments and distributing the data to the broadcast channel. After acquiring the broadcast data resource, the terminal buffers, and broadcasts the buffered data resource to the terminal connected to the terminal, and plays the buffered data resource.

 As shown in FIG. 2, in one embodiment, the foregoing data transmission method further includes the following steps:

 Step S50: Query whether the data resource acquired by the download terminal is missing, and if yes, perform step S60. , find the terminal with the missing data resource and request the broadcast channel.

During data transmission through the broadcast channel, some data resources may not be acquired by the download terminal for various reasons. In an embodiment, the method for actively acquiring is used to periodically query whether the buffer data resource is missing. If yes, query the terminal connected to the download terminal to include the missing part of the data resource, and then include the missing partial data resource. The terminal sends a request for the broadcast channel to obtain the missing part of the data resource.

 As shown in FIG. 3, a data transmission system includes a plurality of terminals and a terminal management server. among them:

The terminal includes a data resource publishing terminal and a download terminal. The data resource publishing terminal is configured to collect data resources and publish data resources, and send a data resource publishing request to the terminal management server. The download terminal is a terminal that receives a data resource, and includes a plurality of download terminals, such as a download terminal. 1. Download terminal 2, download terminal 3, ..., download terminal n . The terminal management server is configured to send a notification to the download terminal after receiving the data resource publishing request sent by the publishing data resource terminal. At the same time, the terminal management server also transmits the data resource information and the terminal information list to the download terminal. The data resource refers to the specific data content that needs to be transmitted, such as the played video content; the data resource information refers to some attribute information of the data resource content, such as the identification number, play position, encoding format, etc. of the data resource; Refers to the information of each terminal recorded by the terminal management server, in the form of a list, such as the identification number of the terminal, IP address, etc.

In one embodiment, the audio resource data resource is exemplified, and the data resource information includes a resource identification number, a play position, an encoding format, a play segment number, a room identification number, and the like. After the download terminal receives the notification sent by the terminal management server, a network connection is established between the data resource issuance terminal and each download terminal and the download terminal, and a broadcast channel is established according to the network connection. According to the received terminal information list, all the terminals have the identification numbers of the terminals in the terminal information list, and establish a network connection with each other according to the terminal identification numbers.

In another embodiment, the data resource issuance terminal is further configured to buffer the data resource, and divide the buffered data resource into a plurality of different segments, and allocate different segments to the broadcast channel. Each broadcast channel is connected to multiple terminals, so that the segment data resources in each broadcast channel are sent to multiple download terminals, so that the bandwidth of the data resource publishing terminal is divided, which saves a lot of download time.

 Data resource publishing terminal and / Or the download terminal may be further configured to send a broadcast channel request command to another download terminal connected thereto, and receive feedback channel information of the broadcast channel request command; the data resource publishing terminal and the download terminal acquire the terminal information after acquiring all the channel information. The data link is published by the data resource publishing terminal through the established data link, and the download terminal acquires the data resource through the established data link. The broadcast channel request command includes a resource identification number, a obtained broadcast channel, and a broadcast channel to be acquired. The channel information of the feedback includes whether the maximum number of connections is exceeded, whether there is resource data, and the number of channels that can be broadcast.

In addition, the download terminal can also correct the established broadcast channel according to the quality of the broadcast channel, thereby better finding a suitable download source and deleting redundant broadcast channels. After the broadcast channel is established, the download terminal can also correct the established broadcast channel according to the quality of the broadcast channel, so that a suitable download source can be better found and the redundant broadcast channel can be deleted. The factors that affect the quality of the broadcast channel include bandwidth, download percentage, whether it is in use, packet loss impact, LAN redundant data, and broadcast request rejection time. The terminal setting threshold and the weight of the broadcast channel quality element are downloaded, and the score of the quality of the broadcast channel is calculated according to the weight, and it is determined whether the score is lower than the threshold, and if so, the broadcast channel is disconnected. In this embodiment, the weights of the quality elements of the broadcast channel are successively decremented. According to these values, the quality of the broadcast channel can be scored. If the score is lower than the set threshold, the broadcast channel needs to be disconnected, and attempts to connect other terminals. Broadcast channel. This threshold can be set by the user as needed or the default value can be used.

The data transmission system may further include a relay server, which is used to establish a network connection with a download terminal that cannot establish a direct network connection with other terminals, so that the download terminal can acquire data resources through the transit server.

 In order to better explain the network connection and data resource transmission process of the above transmission system, as shown in FIG. 4, the data resource issuance terminal and the download terminal 1 Establish a network connection between 2, 3, or establish a network connection through the relay server. After the establishment, the broadcast channel 0, 1, 2, 3, 4, 5, 6, 7 And the data link is established according to the broadcast channel, and the data resource issuance terminal divides the data resource into 8 parts and publishes the data resource through the broadcast channel 0~7, and the download terminal 1 receives the broadcast channel 0 of the data resource release. The data of 2 receives the data of the broadcast channel 4 of the download terminal 2, receives the data of the broadcast channel 1 of the download terminal 3, and simultaneously transmits the data of the broadcast channel 0 to the download terminal 2.

 Figure 5 is a working sequence diagram of the data transmission system, and the download terminal includes a download terminal 1, a download terminal 2, ..., a download terminal n The broadcast channels are 0, 1, 2, 3, 4, 5, 6, and 7. The specific working process of the data transmission system is:

 (1) The data resource issuance terminal sends a request for publishing a data resource to the terminal management server;

 (2) after receiving the request for publishing the data resource, the terminal management server notifies the download terminal 1, the download terminal 2, ..., the download terminal n ;

 (3) download terminal 1 establishes a network connection with all download terminals and data resource publishing terminals;

 (4) The download terminal 1 issues a broadcast channel request command to all connected terminals;

 (5) download terminal 2, download terminal 3, ..., download terminal n After receiving the broadcast channel request command, the data resource publishing terminal feeds back the broadcast channel status to the download terminal 1 , for example, the data resource terminal feedbacks the broadcast channel 0, 1, 2, 3 to the download terminal 1 , download terminal 2, download terminal 3, ..., download terminal n feedback broadcast channel 0, 1, 2, 3, 4, 5, 6 , 7;

 (6) download terminal 1 according to a certain algorithm, download terminal 1 receives 4, 5, 6, 7 Broadcast channel, where a certain algorithm refers to the quality of the query broadcast channel. If the quality is poor, it may not be connected, and query whether the download terminal has obtained the broadcast channel from other terminals. If a certain broadcast channel is acquired, the acquired channel needs to be removed. a certain broadcast channel;

 (7) Download terminal 1 After all the broadcast channels are acquired, a data link is established and received through the established data link 4, 5, 6 , 7 data resources of the broadcast channel.

In one embodiment, the download terminal fills the acquired data resource into the buffer, and is also used to broadcast the buffer data resource to other terminals connected to the download terminal, and play the buffer data resource. The download terminal is further configured to periodically query whether the data resource of the download terminal data buffer is missing data, and if so, find the terminal with the missing data resource and issue a request for the broadcast channel.

 In one embodiment, as shown in FIG. 6, a terminal includes a communication module 60 and a broadcast channel establishment module 62. , data link setup module 64 and transport module 66. among them,

 Communication module 60 And a notification for transmitting a data resource issue request and receiving the terminal management server according to the data resource issue request. Terminal through communication module 60 The data resource issuance request is sent to the terminal management server, and the terminal management server sends a notification to each terminal according to the data resource issuance request. Communication module 60 It is also used to receive data resource information and a list of terminal information. The data resource refers to the specific data content that needs to be transmitted, such as the played video content; the data resource information refers to some attribute information of the data resource content, such as the identification number, play position, encoding format, etc. of the data resource; Refers to the information of each terminal recorded by the terminal management server, in the form of a list, such as the identification number of the terminal, IP address, etc.

 The broadcast channel establishing module 62 is configured to establish a network connection between the terminals, and establish a broadcast channel according to the network connection. Communication module of each terminal 60 After receiving the notification sent by the terminal management server, a network connection is established between the terminals, and then a broadcast channel is established according to the network connection. According to the received terminal information list, all the terminals have the identification numbers of the terminals in the terminal information list, and establish a network connection with each other according to the terminal identification numbers.

 The data link establishment module 64 is configured to establish a data link according to a broadcast channel. In a preferred embodiment, the communication module 60 Sending a broadcast channel request command and receiving feedback channel information of the broadcast channel request command, the data link establishing module 64 is in the communication module 60 After receiving the feedback channel information of the broadcast channel request command, a data link between the terminals is established. The broadcast channel request command includes a resource identification number, a obtained broadcast channel, and a broadcast channel to be acquired. The channel information of the feedback includes whether the maximum number of connections is exceeded, whether there is resource data, and the number of channels that can be broadcast.

 The transmission module 66 is configured to transmit data resources through the data link. After the data link is established, the transmission module 66 The data link will be relied upon for data resource transmission.

 In one embodiment, as shown in FIG. 7, the terminal includes a communication module 60 and a broadcast channel establishing module 62. The data link establishing module 64 and the transmitting module 66 further include a buffering module 61, a playing module 63, a checking module 65, and a correcting module 67.

 The buffer module 61 is configured to buffer the published data resources, and divide the buffered data resources into different segments and pass the transmission module. 66 Transfer to the broadcast channel. Each of the broadcast channels is connected to a plurality of terminals, so that the segment data resources in the respective broadcast channels are transmitted to the plurality of terminals, so that the bandwidth of the terminal that issues the data resources is divided, thereby saving a large amount of download time.

 The transmission module 66 receives the downloaded data resource and transmits it to the buffer module 61 for buffering. Transmission module 66 The buffered published data resource and/or downloaded data resource is also transmitted to the terminal connected to the terminal. Transmission module 66 The data resources issued by the terminal may be sent to other terminals connected to the terminal, or the data resources downloaded from other terminals may be sent to other terminals connected to the terminal.

 The playback module 63 is used to play buffered data resources. For video chat data resources, buffer module 61 The data resource can be buffered and the data resource played through the playback module 63.

 The checking module 65 is used to query whether the data resource downloaded in the buffer module 61 is missing, and if so, the checking module 65 A terminal containing the missing data resource is found and a request for a broadcast channel is issued through the communication module 60.

The correction module 67 is configured to correct the established broadcast channel according to the quality of the broadcast channel. After the broadcast channel is established, the correction module 67 can correct the established broadcast channel according to the quality of the broadcast channel, so that a suitable download source can be better found and the redundant broadcast channel can be deleted. The factors that affect the quality of the broadcast channel include bandwidth, download percentage, whether it is in use, packet loss impact, LAN redundant data, and broadcast request rejection time. The correction module 67 corrects the established broadcast channel, specifically: the correction module 67 sets the threshold and the weight of the broadcast channel quality element, calculates the score of the broadcast channel quality according to the weight, and determines whether the score is lower than the threshold, and if so, the broadcast channel The setup module 62 then disconnects the broadcast channel. In this embodiment, the weights of the quality elements of the broadcast channel are successively decremented. According to these values, the quality of the broadcast channel can be scored. If the score is lower than the set threshold, the broadcast channel needs to be disconnected, and attempts to connect other terminals. Broadcast channel. This threshold can be set by the user as needed or the default value can be used.

The data transmission method, system, and terminal notify the download terminal according to the received data resource release request, and establish a network connection between the data resource issuance terminal and each download terminal and each download terminal according to the notification, and establish a broadcast channel according to the network connection, according to the The broadcast channel establishes a data link and transmits data resources through the data link, so that the data resource is transmitted by using multiple broadcast channels, the bandwidth cost is reduced, and no error occurs due to a problem in one broadcast channel, and the bit error rate is generated. Also reduced.

 In addition, buffering data resources makes data resource transfer faster and saves time.

 Correcting the broadcast channel can improve the effective utilization of the broadcast channel.

The above-mentioned embodiments are merely illustrative of several embodiments of the present invention, and the description thereof is more specific and detailed, but is not to be construed as limiting the scope of the invention. It should be noted that a number of variations and modifications may be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, the scope of the invention should be determined by the appended claims.

Claims (21)

 A data transmission method includes the following steps: A. Receiving a data resource publishing request issued by the data resource publishing terminal, and notifying the downloading terminal according to the request; B. Establishing, according to the notification, a network connection between the data resource publishing terminal and the download terminal and between the download terminal; C. Establishing a broadcast channel according to the network connection; D. Establishing a data link according to the established broadcast channel, and transmitting data resources through the data link. The data transmission method according to claim 1, wherein the step A further comprises the step of transmitting data resource information and a list of terminal information including the data resource issuance terminal and the download terminal to the download terminal. The data transmission method according to claim 1, further comprising the step of correcting the established broadcast channel according to the quality of the broadcast channel after the step C. According to claim 3 The data transmission method is characterized in that: the elements of the quality of the broadcast channel include bandwidth, download percentage, whether it is in use, packet loss impact, local area network redundancy data, and broadcast request rejection time; The method further includes: setting a threshold and a weight of the broadcast channel quality element, calculating a score of the quality of the broadcast channel according to the weight, determining whether the score is lower than the threshold, and if so, disconnecting Said the broadcast channel. The data transmission method according to claim 1, wherein said step D The step of transmitting data resources through the data link further includes: collecting data resources by the data publishing terminal, buffering the data resources, and dividing the buffered data into different segments, and distributing the data to the broadcast channel; and the data resource publishing terminal and the And after the download terminal acquires the broadcasted data resource, buffers, and broadcasts the buffered data resource to the terminal connected to the terminal, and plays the buffered data resource. According to claims 1 to 5 The data transmission method according to any one of the preceding claims, wherein the method further comprises the step of: querying whether the data resource acquired by the download terminal is missing, and if so, searching for the terminal containing the missing data resource and requesting the broadcast channel. A data transmission system, wherein the system includes a terminal and a terminal management server, the terminal includes a data resource publishing terminal and a download terminal, and the data resource publishing terminal is configured to send a data resource release to the terminal management server. The terminal management server is configured to receive a data resource publishing request and send a notification to the download terminal; the download terminal receives the notification and establishes between the data resource publishing terminal and each download terminal and between the download terminal The network connection establishes a broadcast channel according to the network connection; the terminal establishes a data link according to the broadcast channel, and transmits the data resource through the data link. Upon request 7 The data transmission system is characterized in that the terminal management server is further configured to send data resource information and a terminal information list of the terminal to the download terminal. According to claim 7 The data transmission system is characterized in that the data resource issuance terminal is further configured to buffer the data resource, and divide the buffered data into different segments and allocate the data to the broadcast channel; the terminal acquires the broadcast The data resource is then buffered, the buffered data resource is broadcast to the terminal connected to the terminal, and the buffered data resource is played. The data transmission system according to claim 7, wherein the data resource issuance terminal and/or Or the download terminal is further configured to send a broadcast channel request command, and establish a data link between the terminals after receiving the feedback channel information of the broadcast channel request command. Upon request 7 The data transmission system is characterized in that the download terminal is further configured to query whether a data resource downloaded in the buffer is missing, and if so, find a terminal that contains the missing data resource and issue a request for a broadcast channel. The data transmission system according to claim 7, wherein the download terminal further corrects the established broadcast channel according to the quality of the broadcast channel. According to claim 12 The data transmission system is characterized in that: the quality of the broadcast channel includes bandwidth, download percentage, whether it is in use, packet loss impact, local area network redundancy data, and broadcast request rejection time; The download terminal is further configured to set a threshold and a weight of the broadcast channel quality element, calculate a score of the broadcast channel quality according to the weight, determine whether the score is lower than the threshold, and if yes, disconnect The broadcast channel. A terminal, comprising: a communication module, configured to send a data resource publishing request and receive a notification sent by the terminal management server according to the data resource publishing request; a broadcast channel establishing module, configured to establish a network connection between the terminals, and establish a broadcast channel according to the network connection; a data link establishing module, configured to establish a data link according to a broadcast channel; And a transmission module, configured to perform data resource transmission by using the data link. The terminal according to claim 14, wherein the communication module is further configured to receive data resource information and a terminal information list. According to claim 14 The terminal, further comprising a buffer module, configured to buffer the distributed data resource, and divide the buffered data resource into different segments, and transmit the broadcast data to the broadcast channel by using the transmission module. The transmission module receives the downloaded data resource and transmits it to the buffer module for buffering; the transmission module sends the buffered published data resource and / or the downloaded data resource is transmitted to the terminal connected to the terminal. The terminal according to claim 16, further comprising a playing module, wherein the playing module plays the buffered data resource. According to claim 14 The terminal, wherein the communication module is further configured to send a broadcast channel request command and receive feedback channel information of a broadcast channel request command; the data link establishing module receives a broadcast channel request command at the communication module After the feedback channel information, the data link between the terminals is established. According to claim 14 The terminal, further comprising a checking module, wherein the checking module is configured to query whether a data resource downloaded in the buffer module is missing, and if yes, the checking module searches for a terminal that includes a missing data resource, And a request for a broadcast channel is issued through the communication module. The terminal according to claim 14, further comprising a correction module, configured to correct the established broadcast channel according to the quality of the broadcast channel. According to claim 20 The terminal is characterized in that: the quality of the broadcast channel includes bandwidth, download percentage, whether it is in use, packet loss impact, local area network redundancy data, and broadcast request rejection time; The correction module is further configured to set a threshold and a weight of the broadcast channel quality element, calculate a score of the broadcast channel quality according to the weight, and determine whether the score is lower than the threshold, and if yes, the broadcast The channel establishment module disconnects the broadcast channel.

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