WO2018103437A1

WO2018103437A1 - Method, device and system for transmitting data

Info

Publication number: WO2018103437A1
Application number: PCT/CN2017/104467
Authority: WO
Inventors: 冯迅; 周翔波; 刘伟安
Original assignee: 广州华多网络科技有限公司
Priority date: 2016-12-09
Filing date: 2017-09-29
Publication date: 2018-06-14
Also published as: CN106603205B; CN106603205A

Abstract

Provided in the present application are a method, device and system for transmitting data. The method comprises: when a data packet sent to a receiving terminal by a sending terminal is lost, the receiving terminal sending, to the sending terminal and a transit node respectively, a negative acknowledgement corresponding to the lost data packet, wherein when one of the sending terminal and the receiving terminal is a user terminal, the other one is a master transmission node in a transmission network of the user terminal, and the transit node is a transmission node, other than the master transmission node, in the transmission network, and is used for forwarding, after receiving the negative acknowledgement, the negative acknowledgement to the sending terminal; and when receiving the negative acknowledgement, the sending terminal sending, to the receiving terminal and the transit node respectively, the lost data packet, wherein the transit node is also used for forwarding, after receiving the lost data packet, the lost data packet to the receiving terminal. According to the embodiment provided by the present application, the quality of data transmission between a transmission node in a transmission network of a user terminal and the user terminal can be improved.

Description

Data transmission method, device and system

Technical field

The present application relates to the field of communications technologies, and in particular, to a data transmission method, apparatus, and system.

Background technique

In the Internet system, the transmission quality between the client and other devices is a key factor affecting the user's service experience. In the related art, in order to improve transmission quality, a transmission node is allocated to a client in a transmission network of a client, and a "user-side device" link is divided into a "user-transport node" and a "transport node-other device". Two links, which can replace a poor quality link with two better quality links for higher link capacity and better coverage. However, packet loss still occurs between the transit node and the client, and the quality of data transmission cannot be guaranteed.

Summary of the invention

The present application provides a data transmission method, apparatus, and system, which can improve data transmission quality between a transmission node and a client end in a transmission network of a client.

According to a first aspect of the embodiments of the present application, a data transmission method is provided, including the following steps:

When the data packet sent by the sending end to the receiving end is lost, the receiving end sends a negative acknowledgement corresponding to the lost data packet to the sending end and the transit node, respectively, and one of the transmitting end and the receiving end When the user is the client, the other is the primary transit node in the transport network of the client, and the transit node is another transport node in the transport network except the primary transport node, for receiving the negation Forwarding to the sender after replying;

When receiving the negative acknowledgement, the sending end separately sends the lost data packet to the receiving end and the transit node, and the transit node is further configured to: after receiving the lost data packet, Send to the receiving end.

According to a second aspect of the embodiments of the present application, a data transmission method is provided, running on a sending end, including the following steps:

Sending a data packet to the receiving end, where one of the transmitting end and the receiving end is a user end, and the other is a primary transmitting node in the transmission network of the user end;

Receiving a negative acknowledgement corresponding to the data packet sent by the receiving end or the transit node, where the negative acknowledgement is sent by the receiving end to the sending end and the transit node when the data packet is lost, The transit node is a transit node other than the primary transit node in the transport network, and is configured to forward to the sending end after receiving the negative acknowledgement;

The data packet is sent to the receiving end and the transit node respectively, and the transit node is further configured to forward to the receiving end after receiving the data packet.

According to a third aspect of the embodiments of the present application, a data transmission method is provided, running on a receiving end, including the following steps:

When the data packet sent by the sending end to the receiving end is lost, the receiving end sends a negative acknowledgement corresponding to the lost data packet to the sending end and the transit node, respectively, where the sending end and the receiving end are both When one of them is a client, the other is a primary transit node in the transport network of the client, and the transit node is another transport node in the transport network except the primary transport node, and is used to receive the Forwarding the negative response to the sender;

Receiving, by the sending end or the transit node, the lost data packet, where the lost data packet is sent by the sending end to the receiving end and the transit node when receiving the negative acknowledgement, The transit node is further configured to forward to the receiving end after receiving the lost data packet.

According to a fourth aspect of the embodiments of the present application, there is provided a data transmission method, running on a transit node, comprising the following steps:

Receiving a negative acknowledgement sent by the receiving end, and forwarding to the transmitting end, when one of the transmitting end and the receiving end is a user end, and the other is a primary transmitting node in the transmission network of the user end, the negation Responding to a negative acknowledgement corresponding to the lost data packet sent by the receiving end when the data packet sent by the sending end to the receiving end is lost, and the transit node is in the transmission network Other transit nodes outside the primary transport node;

Receiving the lost data packet sent by the sending end, and forwarding the data packet to the receiving end, where the lost data packet is sent by the sending end when receiving the negative acknowledgement.

According to a fifth aspect of the embodiments of the present application, a data transmission apparatus is provided for a transmitting end, including:

a first sending module, configured to send a data packet to the receiving end, where one of the sending end and the receiving end is a user end, and the other is a primary transmitting node in the transmission network of the user end;

a receiving module, configured to receive a negative response corresponding to the data packet sent by the receiving end or the transit node, where the negative response is sent by the receiving end to the sending end and the transit when the data packet is lost Sending by the node, the transit node is another transit node in the transport network except the primary transit node, and is configured to forward to the sending end after receiving the negative acknowledgement;

And a second sending module, configured to send the data packet to the receiving end and the transit node respectively, where the transit node is further configured to forward the data packet to the receiving end after receiving the data packet.

According to a sixth aspect of the embodiments of the present application, a data transmission apparatus is provided for a receiving end, including:

a sending module, configured to send a negative response corresponding to the lost data packet to the sending end and the transit node, respectively, when the data packet sent by the sending end to the receiving end is lost, where the sending end and the receiving end are When one of them is a client, the other is a primary transit node in the transport network of the client, and the transit node is a transport node other than the primary transport node in the transport network, and is used to receive Forwarding the negative response to the sending end;

a receiving module, configured to receive the lost data packet sent by the sending end or the transit node, where the lost data packet is sent by the sending end to the receiving end and the receiving end when receiving the negative acknowledgement The transit node sends, the transit node is further configured to forward to the receiving end after receiving the lost data packet.

According to a seventh aspect of the embodiments of the present application, a data transmission apparatus is provided for a transit node, including:

a receiving module, configured to receive a negative response sent by the receiving end;

a forwarding module, configured to forward the negative response received by the receiving module to the sending end; when one of the sending end and the receiving end is a user end, and the other is a primary transmission in the transmission network of the user end a negative acknowledgement corresponding to the lost data packet sent by the receiving end when the data packet sent by the sending end to the receiving end is lost, and the transit node is in the transmission network. Other transmission nodes than the primary transmission node;

The receiving module is further configured to receive the lost data packet, where the forwarding module is further configured to forward the lost data packet received by the receiving module to the receiving end, where the lost data packet is sent by the The terminal transmits when the negative acknowledgement is received.

According to an eighth aspect of the embodiments of the present application, a data transmission system is provided, the system comprising:

Transmitter, transit node and receiver;

The receiving end is configured to send a negative response corresponding to the lost data packet to the sending end and the transit node, respectively, when the data packet sent by the sending end is lost, the sending end and the receiving end When one of the two ends is a client, the other is a primary transit node within the transport network of the client;

The transit node is a transit node other than the primary transit node in the transport network, and is configured to forward to the sending end after receiving the negative acknowledgement;

The sending end is configured to send the lost data packet to the receiving end and the transit node respectively when receiving the negative acknowledgement;

The transit node is further configured to forward to the receiving end after receiving the lost data packet.

The technical solutions provided by the embodiments of the present application may include the following beneficial effects:

In the present application, a plurality of transmission nodes are allocated to a client in a transmission network of a client, one of which serves as a primary transmission node, and the remaining transmission nodes serve as transit nodes. When the data packet transmitted between the primary transmission node and the UE is lost, the party acting as the receiving end respectively sends a negative response corresponding to the lost data packet to the party that is the transmitting end and the transit node, and the transit node receives the negative response. Forwarding to the party that is the transmitting end; when the party that is the transmitting end receives the negative response, respectively transmitting the lost data packet to the party that is the receiving end and the transit node, the transit node receiving the The lost packet is forwarded to the party that is the receiving end. Through multiple articles The channel ensures that the party acting as the receiving end can receive the lost data packet, thereby improving the quality of the data transmission.

DRAWINGS

FIG. 1 is a network scenario diagram of data transmission according to an exemplary embodiment of the present application.

FIG. 2 is a flowchart of a data transmission method according to an exemplary embodiment of the present application.

FIG. 3 is a schematic diagram of a data transmission according to an exemplary embodiment of the present application.

FIG. 4a is a timing diagram of a data transmission method according to an exemplary embodiment of the present application.

FIG. 4b is a timing diagram of another data transmission method according to an exemplary embodiment of the present application.

FIG. 5 is a flowchart of another data transmission method according to an exemplary embodiment of the present application.

FIG. 6 is a flowchart of another data transmission method according to an exemplary embodiment of the present application.

FIG. 7 is a flowchart of another data transmission method according to an exemplary embodiment of the present application.

FIG. 8 is a block diagram of a data transmission apparatus according to an exemplary embodiment of the present application.

FIG. 9 is a block diagram of another data transmission apparatus according to an exemplary embodiment of the present application.

FIG. 10 is a block diagram of another data transmission apparatus according to an exemplary embodiment of the present application.

FIG. 11 is a schematic diagram of a data transmission system according to an exemplary embodiment of the present application.

detailed description

Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. The following description refers to the same or similar elements in the different figures unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Instead, they are merely examples of devices and methods consistent with aspects of the present application as detailed in the appended claims.

The terminology used in the present application is for the purpose of describing particular embodiments, and is not intended to be limiting. The singular forms "a", "the" and "the" It should also be understood that the term "and/or" as used herein refers to and includes any one or more of the associated listed items or All possible combinations.

It should be understood that although the terms first, second, third, etc. may be used to describe various information in this application, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, the first information may also be referred to as the second information without departing from the scope of the present application. Similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "when" or "when" or "in response to a determination."

FIG. 1 is a network scene diagram for implementing data transmission according to an exemplary embodiment of the present application. As shown in FIG. 1 , the network includes a user terminal 10, a transmission network 20 of the client 10, and other devices 30 (such as a certain area, a computer room, or a base station, etc.), and multiple transmission nodes (transport nodes) in the transmission network 20. 21 and transport node 22, etc., for the client 10 to communicate with other devices 30. For example, the client 10 sends a data request to the transmitting node 21, and the transmitting node forwards the data request to the other device 30, and the other device 30 sends the corresponding data packet to the transmitting node 21. After receiving the data packet, the transmitting node forwards the data packet to the client. 10. The device as the user terminal 10 may be a device that can access the network, such as a mobile phone, a tablet computer, or a notebook. In the related art, packet loss still occurs between the transmission node 21 and the client terminal 10, and the quality of data transmission cannot be guaranteed.

As shown in FIG. 1, the present application allocates at least two transmission nodes (transport node 21 and transmission node 22) to the client 10 in the transmission network 20 of the client 10, one of which serves as a primary transmission node, and the remaining transmission nodes serve as In the transit node, in actual application, there may be multiple transmission nodes. FIG. 1 shows only two transmission nodes for convenience of example. When the data packet transmitted between the primary transmission node and the UE is lost, the party acting as the receiving end respectively sends a negative response corresponding to the lost data packet to the party that is the transmitting end and the transit node, and the transit node receives the negative response. Forwarding to the party that is the transmitting end; when the party that is the transmitting end receives the negative response, respectively transmitting the lost data packet to the party that is the receiving end and the transit node, the transit node receiving the The lost packet is forwarded to the party that is the receiving end. By multiplexing, the receiver can receive lost packets. The present application will be described in detail below with reference to FIG.

As shown in FIG. 2, FIG. 2 is a flowchart of a data transmission method according to an exemplary embodiment of the present application, and the method may include the following steps S201 to S202:

In step S201, when the data packet sent by the transmitting end to the receiving end is lost, the receiving end sends a negative acknowledgement corresponding to the lost data packet to the sending end and the transit node, respectively, the sending end and the receiving end. When one of the two ends is a client, the other is a primary transit node in the transport network of the client, and the transit node is another transit node in the transport network except the primary transport node, After receiving the negative acknowledgement, it is forwarded to the sender.

In step S202, when receiving the negative response, the sending end sends the lost data packet to the receiving end and the transit node, respectively, and the transit node is further configured to receive the lost The data packet is forwarded to the receiving end.

In the embodiment of the present application, there are various reasons for data packet loss, such as physical line failure, device failure, virus attack, routing information error, and the like. When the data packet sent by the sender to the receiver is lost, the receiver records the sequence number of the lost packet and constructs a NACK (Negative-Acknowledgment), which is then sent to the sender. If the sender finds the corresponding The packet is resent. In order to ensure that the receiving end can receive the lost data packet, the present application transmits the negative acknowledgement and the lost data corresponding to the lost data packet through multiple channels of “sender-receiver” and “sender-transfer node-receiver” respectively. The packet guarantees that the receiving party receives the lost packet.

FIG. 3 is a schematic diagram of a data transmission according to an exemplary embodiment of the present application. As shown in FIG. 3, the transmission network 20 including the UE 10 and the UE, and the transmission node 21 and the transmission node 22 in the transmission network 20 are used. In this embodiment, the transmission node 21 is used as the primary transmission node, and the transmission node 22 is used as the transmission node 22. The transit node; the party as the sender/receiver may be the transit node 21 or the client 10, wherein the data transmitted from the transit node 21 to the client 10 is referred to as downlink data, and the data transmitted from the client 10 to the master transit node 21 It is called uplink data.

FIG. 4 is a timing diagram of a data transmission method according to an exemplary embodiment of the present application. The process of downlink data transmission in the embodiment of the present application is described in conjunction with FIG. 2, FIG. 3, and FIG. 4a, that is, the transmission node 21 functions as At the transmitting end, the client 10 acts as a receiving end.

S401a, the transmitting node 21 sends a data packet to the client 10.

S402a, when the data packet sent by the transmission node 21 to the UE 10 is lost, the UE 10 transmits a negative response corresponding to the lost data packet to the transmission node 21 and the transmission node 22, respectively.

S403a, the transmitting node 22 forwards to the transmitting node 21 upon receiving the negative acknowledgement.

S404a. When receiving the negative response sent by the UE 10 or the transmitting node 22, the transmitting node 21 transmits the lost data packet to the UE 10 and the transmitting node 22, respectively.

S405a. After receiving the lost data packet sent by the transit node 21, the transit node 22 forwards the lost data packet to the client 10.

S406a, the UE 10 receives the lost data packet sent by the transmission node 21 or the transmission node 22.

The above is the transmission process of the downlink data, and the transmission process of the uplink data can be seen in FIG. 4b. FIG. 4b is a timing diagram of another data transmission method according to an exemplary embodiment of the present application. Referring to FIG. 2, FIG. 3 and FIG. 4b, the process of uplink data transmission in the embodiment of the present application is described, that is, the UE 10 serves as a transmitting end, and the transmitting node 21 serves as a receiving end.

S401b, the client 10 sends a data packet to the transmission node 21.

S402b, when the data packet sent by the UE 10 to the transmission node 21 is lost, the transmission node 21 transmits a negative response corresponding to the lost data packet to the UE 10 and the transmission node 22, respectively.

S403b, the transmitting node 22 forwards the signal to the client 10 upon receiving the negative acknowledgement.

S404b, when receiving the negative response sent by the transmission node 21 or the transmission node 22, the UE 10 transmits the lost data packet to the transmission node 21 and the transmission node 22, respectively.

S405b, after receiving the lost data packet sent by the UE 10, the transit node 22 forwards the data packet to the transport node 21.

S406a, the transmitting node 21 receives the lost data packet sent by the UE 10 or the transmitting node 22.

It can be understood that there may be multiple transmission nodes in the actual application, one of which is used as the primary transmission node, and the other as the transit node, when the data packet sent between the primary transmission node and the client is lost, between the primary transmission node and the user end. While retransmitting data, data can be retransmitted only through one of the transit nodes, or multiple transit nodes can be retransmitted from all transit nodes at the same time, or all transit nodes can retransmit data at the same time, and the specific processing manner It can be flexibly configured as needed, and only two transmission nodes are shown for convenience of illustration in FIGS. 4a and 4b.

The above embodiment shows the process of separately transmitting lost data packets through a plurality of channels after the data packet is lost. However, when the data packet is lost, the receiving end sends a response corresponding to the lost data packet, and the transmitting end resends the lost data packet after receiving the negative acknowledgement, which may delay the sending and receiving of the data packet. Therefore, in some examples, during the first transmission of any data packet, the transmitting end may separately send the any data packet to the receiving end and the transit node, and the transit node receives the Any data packet is forwarded to the receiving end. When the data packet is first sent, the same data packet is multiplexed to ensure that the receiving end can receive the data packet without having to wait until the data packet is lost and then resend, thereby speeding up data transmission.

FIG. 5 is a flowchart of another data transmission method according to an exemplary embodiment of the present application. It can be run on the sending end, as shown in Figure 5, the method includes the following steps:

S501: Send a data packet to the receiving end, where one of the sending end and the receiving end is a user end, and the other is a primary transmitting node in the transmission network of the user end.

S502: Receive a negative response corresponding to the data packet sent by the receiving end or the transit node, where the negative response is sent by the receiving end to the sending end and the transit node when the data packet is lost. The transit node is a transit node other than the primary transit node in the transport network, and is configured to forward to the sending end after receiving the negative acknowledgement.

S503. The data packet is sent to the receiving end and the transit node, and the transit node is further configured to forward the data packet to the receiving end after receiving the data packet.

In this embodiment, the data transmission process between the receiving end, the transmitting end, and the transit node may refer to the embodiment shown in FIG. 2.

In an optional implementation manner, any one of the data packets may be sent to the receiving end and the transit node respectively during the first sending of any data packet, and the transit node receives any of the foregoing The data packet is forwarded to the receiving end.

FIG. 6 is a flowchart of another data transmission method according to an exemplary embodiment of the present application. It can be run on the receiving end, as shown in Figure 6, the method includes the following steps:

S601, when the data packet sent by the sending end to the receiving end is lost, the receiving end sends a negative response corresponding to the lost data packet to the sending end and the transit node, respectively, the sending end and the sending end When one of the receiving ends is a subscriber end, the other is a primary transit node in the transport network of the subscriber end, and the transit node is another transport node in the transport network except the primary transport node, and is used for After receiving the negative acknowledgement, it is forwarded to the sender.

S602. Receive the lost data packet sent by the sending end or the transit node, where the lost data packet is sent by the sending end to the receiving end and the transit node when receiving the negative acknowledgement Sending, the transit node is further configured to forward to the receiving end after receiving the lost data packet.

FIG. 7 is a flowchart of another data transmission method according to an exemplary embodiment of the present application. It can be run on a transit node, as shown in Figure 7, the method includes the following steps:

S701. Receive a negative acknowledgement sent by the receiving end, and forward it to the sending end. When one of the sending end and the receiving end is a user end, the other is a primary transmitting node in the transport network of the user end. The negative response is a negative acknowledgement corresponding to the lost data packet sent by the receiving end when the data packet sent by the sending end to the receiving end is lost, and the transit node is in the transmission network. Other transit nodes outside the primary transport node.

S702. Receive the lost data packet sent by the sending end, and forward the data packet to the receiving end, where the lost data packet is sent by the sending end when receiving the negative acknowledgement.

In this embodiment, the data transmission process of the receiving end and the transmitting end may refer to the embodiment shown in FIG. 2 .

Corresponding to the foregoing embodiment of the data transmission method, the present application also provides an embodiment of a data transmission device.

Please refer to FIG. 8. FIG. 8 is a block diagram of a data transmission apparatus 800, which may be used in a transmitting end, according to an exemplary embodiment. The apparatus includes:

The first sending module 801 is configured to send a data packet to the receiving end, where one of the sending end and the receiving end is a user end, and the other is a primary transmitting node in the transmission network of the user end;

The receiving module 802 is configured to receive a negative acknowledgement corresponding to the data packet sent by the receiving end or the transit node, where the negative acknowledgement is sent by the receiving end to the sending end and the Transmitted by the transit node, the transit node is other than the primary transport node in the transport network a transmitting node, configured to forward to the sending end after receiving the negative acknowledgement;

The second sending module 803 is configured to send the data packet to the receiving end and the transit node respectively, where the transit node is further configured to forward to the receiving end after receiving the data packet.

In an optional implementation manner, the first sending module 801 is further configured to:

During the first transmission of any data packet, the any data packet is sent to the receiving end and the transit node respectively, and the transit node forwards the data packet to the receiving end after receiving any one of the data packets.

FIG. 9 is a block diagram of another data transmission apparatus 900 according to an exemplary embodiment of the present application, which may be used for a receiving end. As shown in FIG. 9, the apparatus includes:

a sending module 901, configured to send, when the data packet sent by the sending end to the receiving end is lost, a negative acknowledgement corresponding to the lost data packet to the sending end and the transit node, where the sending end and the sending end When one of the receiving ends is a UE, the other is a primary transit node in the transport network of the UE, and the transit node is a transport node other than the primary transit node in the transport network, Forwarding to the sending end after receiving the negative acknowledgement;

a receiving module 902, configured to receive the lost data packet sent by the sending end or the transit node, where the lost data packet is sent by the sending end to the The receiving end and the transit node send, and the transit node is further configured to forward to the receiving end after receiving the lost data packet.

FIG. 10 is a block diagram of another data transmission apparatus 1000 according to an exemplary embodiment of the present application, which may be used in a transit node, as shown in FIG. 10, the apparatus includes:

The receiving module 1001 is configured to receive a negative response sent by the receiving end.

The forwarding module 1002 is configured to forward the negative response received by the receiving module to the sending end; when one of the sending end and the receiving end is a user end, and the other is the main in the transmission network of the user end a transmission node, the negative response is a negative response corresponding to the lost data packet sent by the receiving end when the data packet sent by the sending end to the receiving end is lost, and the transit node is the transmission network All other transmission nodes except the primary transmission node;

The receiving module 1001 is further configured to receive the lost data packet, where the forwarding module 1002 is further configured to forward the lost data packet received by the receiving module to the receiving end, the lost data. The packet is transmitted by the transmitting end upon receiving the negative acknowledgement.

FIG. 11 is a schematic diagram of a data transmission system according to an exemplary embodiment of the present application. As shown in FIG. 11, the transmission system includes:

The transmitting end 1101, the transit node 1102, and the receiving end 1103.

The receiving end is configured to send a negative response corresponding to the lost data packet to the sending end and the transit node, respectively, when the data packet sent by the sending end is lost, the sending end and the receiving end When one of the two ends is a client, the other is a primary transit node within the transport network of the client.

The transit node is a transit node other than the primary transit node in the transport network, and is configured to forward to the sending end after receiving the negative acknowledgement.

The transmitting end is configured to send the lost data packet to the receiving end and the transit node respectively when receiving the negative acknowledgement.

In an optional implementation manner, the sending end 1101 is further configured to send the any data packet to the receiving end and the transit node, respectively, in a first sending process of any data packet. The transit node forwards the any data packet to the receiving end after receiving the data packet.

For details of the implementation process of the functions and functions of the modules in the foregoing devices, refer to the implementation process of the corresponding steps in the foregoing methods, and details are not described herein again.

For the device embodiment, since it basically corresponds to the method embodiment, reference may be made to the partial description of the method embodiment. The device embodiments described above are merely illustrative, wherein the modules described as separate components may or may not be physically separate, and the components displayed as modules may or may not be physical modules, ie may be located A place, or it can be distributed to multiple network modules. Some or all of the modules may be selected according to actual needs to achieve the objectives of the present application. Those of ordinary skill in the art can understand and implement without any creative effort.

The above is only the preferred embodiment of the present application, and is not intended to limit the application. Any modifications, equivalent substitutions, improvements, etc., which are made within the spirit and principles of the present application, should be included in the present application. Please protect the scope.

Claims

A data transmission method, comprising the steps of:

When the data packet sent by the sending end to the receiving end is lost, the receiving end sends a negative acknowledgement corresponding to the lost data packet to the sending end and the transit node, respectively, and one of the transmitting end and the receiving end When the user is the client, the other is the primary transit node in the transport network of the client, and the transit node is another transport node in the transport network except the primary transport node, for receiving the negation Forwarding to the sender after replying;

When the negative response is received, the sending end sends the lost data packet to the receiving end and the transit node, and the transit node is further configured to forward after receiving the lost data packet. To the receiving end.
The method of claim 1 wherein said method further comprises the steps of:

During the first transmission of any data packet, the transmitting end sends the any data packet to the receiving end and the transit node, respectively, and the transit node forwards the data packet to the station after receiving the any data packet. Said receiver.
A data transmission method is characterized in that it runs on a transmitting end, and the method comprises the following steps:

Sending a data packet to the receiving end, where one of the transmitting end and the receiving end is a user end, and the other is a primary transmitting node in the transmission network of the user end;

Receiving a negative acknowledgement corresponding to the data packet sent by the receiving end or the transit node, where the negative acknowledgement is sent by the receiving end to the sending end and the transit node when the data packet is lost, The transit node is a transit node other than the primary transit node in the transport network, and is configured to forward to the sending end after receiving the negative acknowledgement;

The data packet is sent to the receiving end and the transit node respectively, and the transit node is further configured to forward to the receiving end after receiving the data packet.
The method of claim 3 wherein said method further comprises the steps of:

Sending to the receiving end and the transit node respectively during the first transmission of any data packet The any data packet, the transit node forwards to the receiving end after receiving any one of the data packets.
A data transmission method is characterized in that it runs on a receiving end, and the method comprises the following steps:

When the data packet sent by the sending end to the receiving end is lost, the receiving end sends a negative acknowledgement corresponding to the lost data packet to the sending end and the transit node, respectively, where the sending end and the receiving end are both When one of them is a client, the other is a primary transit node in the transport network of the client, and the transit node is another transport node in the transport network except the primary transport node, and is used to receive the Forwarding the negative response to the sender;

Receiving, by the sending end or the transit node, the lost data packet, where the lost data packet is sent by the sending end to the receiving end and the transit node when receiving the negative acknowledgement, The transit node is further configured to forward to the receiving end after receiving the lost data packet.
A data transmission method, characterized in that it is used for a transit node, and the method comprises the following steps:

Receiving a negative acknowledgement sent by the receiving end, and forwarding to the transmitting end, when one of the transmitting end and the receiving end is a user end, and the other is a primary transmitting node in the transmission network of the user end, the negation Responding to a negative acknowledgement corresponding to the lost data packet sent by the receiving end when the data packet sent by the sending end to the receiving end is lost, and the transit node is the main transmission in the transmission network. Other transit nodes outside the node;

Receiving the lost data packet sent by the sending end, and forwarding the data packet to the receiving end, where the lost data packet is sent by the sending end when receiving the negative acknowledgement.
A data transmission device, which is used for a transmitting end, and includes:

a first sending module, configured to send a data packet to the receiving end, where one of the sending end and the receiving end is a user end, and the other is a primary transmitting node in the transmission network of the user end;

a receiving module, configured to receive a negative response corresponding to the data packet sent by the receiving end or the transit node, where the negative response is sent by the receiving end to the sending end and the transit when the data packet is lost Sending by the node, the transit node is another transit node in the transport network except the primary transit node, and is configured to forward to the sending end after receiving the negative acknowledgement;

And a second sending module, configured to send the data packet to the receiving end and the transit node respectively, where the transit node is further configured to forward the data packet to the receiving end after receiving the data packet.
The device according to claim 7, wherein the first sending module is further configured to:

During the first transmission of any data packet, the any data packet is sent to the receiving end and the transit node respectively, and the transit node forwards the data packet to the receiving end after receiving any one of the data packets.
A data transmission device, configured to be used at a receiving end, comprising:

a sending module, configured to send a negative response corresponding to the lost data packet to the sending end and the transit node, respectively, when the data packet sent by the sending end to the receiving end is lost, where the sending end and the receiving end are When one of them is a client, the other is a primary transit node in the transport network of the client, and the transit node is a transport node other than the primary transport node in the transport network, and is used to receive Forwarding the negative response to the sending end;

a receiving module, configured to receive the lost data packet sent by the sending end or the transit node, where the lost data packet is sent by the sending end to the receiving end and the receiving end when receiving the negative acknowledgement The transit node sends, the transit node is further configured to forward to the receiving end after receiving the lost data packet.
A data transmission device, characterized in that it is used for a transit node, including:

a receiving module, configured to receive a negative response sent by the receiving end;

a forwarding module, configured to forward the negative response received by the receiving module to the sending end; when one of the sending end and the receiving end is a user end, and the other is a primary transmission in the transmission network of the user end a negative acknowledgement corresponding to the lost data packet sent by the receiving end when the data packet sent by the sending end to the receiving end is lost, and the transit node is in the transmission network. Other transmission nodes than the primary transmission node;

The receiving module is further configured to receive the lost data packet, where the forwarding module is further configured to forward the lost data packet received by the receiving module to the receiving end, where the lost data packet is sent by the The terminal transmits when the negative acknowledgement is received.
A data transmission system, comprising: a transmitting end, a transit node, and a receiving end;

The receiving end is configured to separately send a data packet sent to the sending end to the sender The transmitting end and the transit node send a negative response corresponding to the lost data packet, where one of the transmitting end and the receiving end is a user end, and the other is a primary transmitting node in the transport network of the user end;

The transit node is a transit node other than the primary transit node in the transport network, and is configured to forward to the sending end after receiving the negative acknowledgement;

The sending end is configured to send the lost data packet to the receiving end and the transit node respectively when receiving the negative acknowledgement;

The transit node is further configured to forward to the receiving end after receiving the lost data packet.
The system of claim 11 wherein said sender is further configured to:

Sending any of the data packets to the receiving end and the transit node respectively during the first sending of any data packet;

The transit node is further configured to forward to the receiving end after receiving any of the data packets.