WO2009059545A1

WO2009059545A1 - A data transmission method, device and system

Info

Publication number: WO2009059545A1
Application number: PCT/CN2008/072882
Authority: WO
Inventors: Yanqiang Zhang
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2007-10-30
Filing date: 2008-10-30
Publication date: 2009-05-14
Also published as: CN101162971A; CN101162971B

Abstract

The embodiment of present invention discloses a data transmission method. The method includes obtaining capability information from a receiving end for receiving transmission control protocol/Internet protocol (TCP/IP) data. Size of a TCP/IP connecting window is adjusted according to the capability information. The adjusted size of the TCP/IP connecting window is notified to a sending end. The TCP/IP data sent by the sending end is received and cached. The cached TCP/IP data is dispatched to send to the receiving end according to the capability information. A data transmission device and a data transmission system are also disclosed by the present invention. The transmission throughput of the transmission control protocol/Internet protocol (TCP/IP) data is improved by utilizing the present invention. The consistency of end to end is ensured and the loss of data is avoided by utilizing the present invention.

Description

Method, device and system for data transmission

[I] Technical field

[2] The present invention relates to the field of communication technologies, and in particular, to a method, device and system for data transmission.

[3] Background of the invention

[4] With the development of mobile communication technology, the bandwidth of mobile communication systems is wider and wider, and the types of services that can be carried are more and more extensive. The convergence of mobile communication networks and the Internet has become a trend of communication technology development. Transmission Control Protocol/Internet Protocol widely used on the Internet (Transmission Control Protocol I Internet)

Protocol, TCP/IP) protocol is a network-based protocol (IP)-based connected transmission control protocol, which is designed based on the transmission characteristics of fixed network systems. The application of TCP/IP protocol to wireless networks will introduce larger The delay, resulting in a decline in TCP/IP performance.

[5] In order to reduce delay and improve the data transmission throughput of TCP/IP, the prior art provides a solution.

[6] The technical solution is to separate the TCP/IP link into two segments on the intermediate path of the TCP/IP connection. One segment is responsible for receiving and buffering the sender Data

The Sender (server) downlink data, and directly returns the response ACK information of the data to the server; the other segment is responsible for transmitting the buffered data to the receiving UE, and intercepting the ACK information returned by the receiving end to the server.

[7] In the process of implementing the present invention, the inventors found that the prior art has the following deficiencies:

[8] After receiving the downlink data of the transmitting end, the technical solution in the prior art directly returns the response ACK information of the data to the server, resulting in a lower rate of TCP/IP transmission and a smaller transmission throughput.

[9] Summary of the invention

[10] The embodiment of the invention provides a data transmission method, device and system, which are used to further improve the transmission rate of TCP/IP data and improve the transmission throughput.

[I I] An embodiment of the present invention provides a data transmission method, where the method includes:

[12] Obtaining the capability information of the receiving end receiving the Transmission Control Protocol/Internet Protocol TCP/IP data, according to the energy Force information to adjust the size of the TCP/IP connection window, and notify the sender of the adjusted TCP/IP connection window size.

[13] receiving and buffering TCP/IP data sent by the sending end;

[14] According to the capability information, the scheduled buffered TCP/IP data is sent to the receiving end.

An embodiment of the present invention further provides a data transmission device, including:

[16] an obtaining module, configured to acquire capability information of the receiving end receiving the Transmission Control Protocol/Internet Protocol TCP/IP data;

[17] an adjustment module, configured to adjust a TCP/IP connection window size according to the capability information acquired by the acquiring module; [18] a cache module, configured to receive and cache TCP/IP data sent by the sending end;

[19] a sending module, configured to notify the sending end of the adjusted TCP/IP connection window size according to the adjustment result of the adjusting module; and, according to the capability information acquired by the obtaining module, scheduling the cached TCP in the cache module /IP data is sent to the receiving end.

[20] The embodiment of the invention provides a data transmission system, including:

[21] The sender device is configured to send TCP/IP data;

[22] a receiving end device, configured to receive TCP/IP data, and provide capability information of the receiving end device to receive TCP/IP data;

[23] a data transmission device, configured to acquire capability information of the receiving end device to receive TCP/IP data, adjust a TCP/IP connection window size according to the capability information, and notify the adjusted TCP/IP connection window size a sending end device; receiving TCP/IP data sent by the sending end device and buffering TCP/IP data sent by the sending end device; according to the capability information, scheduling buffered TCP/IP data is sent to the receiving End device.

[24] In the embodiment of the present invention, acquiring capability information of the TCP/IP data received by the receiving end, adjusting the size of the TCP/IP connection window according to the capability information, and notifying the sending end of the adjusted TCP/IP connection window size; Decoding and transmitting the TCP/IP data sent by the sender; according to the capability information, scheduling the buffered TCP/IP data to be sent to the receiving end. Since the TCP/IP connection window size is adjusted according to the capability information of the receiving end receiving TCP/IP data, the transmitting end can send the TC P/IP data according to the adjusted TCP/IP connection window, without the receiving end confirming receipt. After the data is obtained, the TCP/IP data is forwarded from the transmitting end to the receiving end, thereby greatly reducing the loopback delay of the transmission path, that is, the loopback of the transmission path is delayed. The delay of the entire transmission path from the receiving end to the transmitting end is reduced to the delay of the buffer processing device from the receiving end to the transmission path, thereby improving the data transmission rate of TCP/IP and significantly improving the transmission throughput of TCP/IP data. .

[25] BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic flowchart of processing of data transmission in an embodiment of the present invention; FIG.

2 is a schematic structural diagram of a specific example of a data transmission system according to an embodiment of the present invention;

3 is a schematic structural diagram of a specific example of a data transmission system in a WCDMA wireless communication system according to an embodiment of the present invention;

4 is a schematic diagram of a process of establishing an original TCP/IP connection in an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a header of a TCP packet of a TCP/IP synchronization data packet according to an embodiment of the present invention; FIG.

6 is a schematic structural diagram of a header of an IP packet of a TCP/IP synchronization data packet according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of a process of establishing a TCP/IP connection after using a TPE function according to an embodiment of the present invention; FIG.

8 is a processing flowchart of a specific example of data transmission in an embodiment of the present invention;

9A and FIG. 9B are schematic diagrams showing the structure of a data processing device according to an embodiment of the present invention;

FIG. 10 is a schematic structural diagram of a data transmission system according to an embodiment of the present invention.

[36] Specific implementation

[37] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[38] As shown in FIG. 1, in the technical solution provided by the embodiment of the present invention, a processing flow of data transmission may be as follows:

[39] Step 11. Obtain the capability information of the receiving end to receive TCP/IP data, adjust the TCP/IP connection window size according to the capability information, and notify the sending end of the adjusted TCP/IP connection window size.

[40] Step 12. Receive TCP/IP data sent by the sender and cache it.

[41] Step 13. According to the receiving end receiving TCP/IP data capability information, the scheduled buffered TCP/IP data is sent to the receiving end.

[42] In step 11, the method for obtaining capability information may be: receiving response data returned by the receiving end, where the response data includes capability information, and parsing the response data to obtain capability information, that is, by parsing the response data of the receiving end Obtaining the capability information, where the response data is response data returned by the receiving end after receiving the TCP/IP data sent by the forwarded sending end. In another embodiment, the acquiring capability information The method may also be that the capability information reported by the receiving end is received.

[43] In step 12, receiving TCP/IP data sent by the sender and performing buffering may be: receiving TCP/IP data sent by the sender according to the adjusted TCP/IP connection window size and buffering.

[44] After receiving the TCP/IP data sent by the sender, before transmitting the TCP/IP data to the receiver, the TCP/IP data can be parsed to obtain an isochronous packet; and then the isochronous packet is parsed to obtain TCP/ Source IP address, destination IP address, source port number, and destination port number of the IP data. Therefore, the received TCP/IP data can be forwarded to the receiving end according to the source IP address, the destination IP address, the source port number, and the destination port number.

[45] In an embodiment, the synchronization data packet includes an IP header and a TCP header, wherein the IP header encapsulates the source IP address and the destination IP address of the TCP/IP data, and the IP header of the synchronization packet can be parsed by The source IP address and the destination IP address of the TCP/IP data are obtained; the source port number and the destination port number of the TCP/IP data encapsulated in the TCP header can be obtained by parsing the TCP header of the synchronous data packet to obtain TCP/IP data. Source port number and destination port number.

[46] Since the throughput of TCP/IP data transmission conforms to the following theoretical formula:

[47] TCP/IP Transfer Rate = TCP/IP Connection Window (also called Connection Window) ZRTT

[48] Where: The size of the TCP/IP connection window is min {the TCP/IP receiving window size of the receiving end, and the CWND } maintained by the transmitting end. During normal data transmission, the value is the TCP/IP receiving window size of the receiving end. RTT is an end-to-end loopback delay.

[49] From the above theoretical formula analysis, to improve the TCP / IP data transmission rate, you can use two measures: 1, increase the TCP connection window; 2, shorten the RTT delay.

[50] In an embodiment, after adjusting the TCP/IP connection window size according to the capability information, the TCP/IP 16-bit window size may be obtained according to the capability information; determining TCP/IP

16-bit window size is smaller than the threshold 吋, you can expand TCP/IP

16-bit window size, according to expanded TCP/IP

16-bit window size adjustment TCP/IP connection window size. Among them, expand TCP/IP

16-bit window size can be TCP/IP

The 16-bit window is expanded to the threshold and can be expanded by a preset ratio.

[51] After the TCP/IP data is sent to the receiving end, the TCP/IP data is parsed, and after the isochronous data packet is obtained, To further obtain the TCP/IP window scale-up factor by parsing the isochronous packet. According to the expanded TCP/IP

16-bit window size adjustment TCP/IP connection window size 吋, you can adjust the TCP/IP connection window size according to the TCP/IP window scale-up factor and the expanded TCP/IP 16-bit window size.

[52] In the data transmission method provided by the foregoing embodiment, the adjusted TCP/IP connection window size is notified to the sending end, so that the sending end sends the TCP/IP data according to the adjusted TCP/IP connection window size, that is, by increasing The TCP connection window size is used to increase the TCP/IP data transfer rate. Receiving TCP/IP data sent by the sending end according to the adjusted TCP/IP connection window size, and buffering, according to the response returned by the receiving end, the buffered TCP/IP data is continuously sent to the receiving end, and the response returned by the receiving end does not need to be forwarded. To the sender, the TCP/IP data is forwarded from the sender to the receiver, so as to reduce the loopback delay of the transmission path, that is, the loopback of the transmission path is delayed by the delay of the entire transmission path from the receiver to the sender. The delay to the cache processing device in the transmission path from the receiving end to the transmission path improves the data transmission rate of TCP/IP. In addition, since the TCP/IP data is scheduled and sent after receiving the response from the receiving end, end-to-end consistency is also ensured, and data loss is avoided.

[53] The data transfer process shown in Figure 1 can be performed by a data transfer device that can be located on a TCP/IP data transfer path, for example, at any intermediate node of a TCP/IP data transfer. The data processing device can be applied to a wireless communication system, such as an access network node located in a WCDMA/CDMA/WiM AX system, a CN node, and a CN node in a GSM system.

[54] A specific example is shown in Figure 2. Data transmission system, on the transmission side (Data_ _Sn d) and the receiver (D ata.rcv) during data transfer in a node, adding a functional enhancement TCP (TCP Performance Enhance, TPE) entity (i.e., the above-described data transmission The device is responsible for receiving the T CP/IP data sent by the sender, and buffering the received TCP/IP data in the buffer BUFFER of the device, and transmitting the buffered T CP/IP data to the receiving end. The TPE entity obtains the capability information of the receiving end receiving the TCP/IP data according to the response ACK information returned by the receiving end, and the TCP/IP data buffered according to the capability information is continuously sent to the receiving end; on the other hand, the TPE entity receives the information. After the ACK information returned by the receiving end, in addition to scheduling the TCP/IP data in the buffer according to the obtained capability information and transmitting, the TCP/IP 16-bit window size in the ACK can be expanded, thereby expanding the TCP/IP connection window size, and The expanded TCP/IP connection window size is fed back to the sender, and the trigger sender continues to send TCP/IP data to the TPE entity. As shown in the embodiment of FIG. 3, in the WCDMA wireless communication system, the TPE entity may be in the RNC, and the WCDMA wireless communication system further includes a sender server, and a receiver user equipment UE.

[56] A TCP/IP connection setup process typically requires 3 handshakes, as shown in Figure 4.

[57] The header structure of the TCP packet of the TCP/IP synchronization packet is as shown in FIG. 5;

[58] The header structure of the IP packet of the TCP/IP synchronization packet is as shown in FIG. 6.

[59] The three-way handshake change of the TCP/IP after the data transmission by using the TPE entity is as shown in FIG. 7. The specific step is that the user equipment UE sends a TCP/IP synchronous handshake packet segment 1, and the TPE uses the TCP. /IP synchronous handshake packet segment 1 is forwarded to the server Server, and the server sends a synchronization acknowledgement packet segment 2, and the TP E forwards the synchronization acknowledgement packet segment 2 to the UE, and the UE sends the segment 3 (ACK). The TPE will modify the segment 3 (ACK) receive window size, and then send the modified segment 3 (ACK, ) to Ser ver°.

As shown in FIG. 8, in this embodiment, in combination with the TPE entity, the processing flow of the data transmission may be as follows: [61] Step 81: Parse the received TCP/IP data to establish a TPE entity.

[62] The TPE entity parses the received TCP/IP data, and by analyzing the SYN bit in the TCP packet header, it can identify whether it is a TCP/IP synchronization packet. If the packet is identified as the TCP/IP synchronous handshake packet segment 1 sent by the UE, the source IP address and the destination IP address of the TCP/IP data can be obtained by parsing the IP header of the synchronization packet; The source port number and destination port number of the TCP/IP data can be obtained by synchronizing the TCP header of the packet. The source port number and the destination port number are recorded, and the corresponding TPE entity is established by using the source IP address, the destination IP address, the source port number, and the destination port number as characteristics.

[63] The TPE entity continues to monitor the synchronization acknowledgement packet segment 2 sent by the server to the UE, and by parsing the segment 1 and the segment 2, the window proportion of the TCP/IP connection window corresponding to the TPE entity can be obtained. Expansion factor.

[64] Step 82. Modify the receive window size of TCP/IP.

[65] The TPE entity receives the segment 3 sent by the UE to the server, and according to the TCP header information of the segment 3, parses the size of the TCP/IP receiving window of the UE, for example, 8096. Modify the 16-bit window size in segment 3 to be the largest, that is, 65535, and send the modified segment 3 to the server to notify the server of the adjusted TC P/IP receiving window size. Of course, if the TCP/IP receiving window size reported by the UE is already the largest, the window is not expanded in the TPE entity. [66] After receiving the notification of the adjusted TCP/IP connection window size sent by the TPE entity, the server considers that it can send "65535"

Window scale expansion factor "data bytes, instead of "8096 * window scale expansion factor", press "65535

* Window scale expansion factor "Continue to send TCP/IP data.

[67] The data sent by the sender is buffered in the TPE entity. Since the TPE entity has learned that the amount of data that the UE can receive is, for example, "8096* window scale expansion factor", the "8096* window ratio in the cache can be obtained. The expansion factor "data continues to be sent to the UE.

[68] If the TPE entity receives the acknowledgment data packet fed back by the UE, and confirms that the UE has received all the "8096* window ratio" TCP/IP data, and can receive the "8096* window ratio" data, The "8096* window scale" data that has been cached in the TPE entity is directly sent to the UE; the acknowledgment packet fed back by the UE is modified, and the server is notified to resend the new data to the TPE cache.

[69] Step 83: Release the TPE entity corresponding to the TCP/IP connection.

[70] Parsing the TCP/IP packet of the connection. If a packet indicating the end of the connection is received, such as a FIN packet, the shell IJ means that the TCP/IP connection ends and the TPE entity corresponding to the connection is released.

[71] The TPE entity can be either a physical entity or a logical entity.

[72] It can be seen from the flow shown in FIG. 8 that the second "8096* window scale expansion factor" data packet is sent to the UE, and there is no need to send an acknowledgement packet confirming that the last data has been received to the server, and there is no need Then take the packet from the Server. It is equivalent to shortening the return of the entire path from RTT1 + RTT2 (receiver to sender) to RTT2 (data processing device in the receiving end to the transmission path, TPE entity), which greatly increases the TCP/IP data transmission rate. .

[73] On the other hand, since the TPE entity sends the acknowledgment packet of the window adjustment to the server after receiving the acknowledgment packet of the UE, there is no server that the UE has received the data packet, but the UE does not actually receive the packet. End-to-end consistency is maintained for packet exceptions.

[74] Based on the same inventive concept, an embodiment of the present invention further provides a data transmission device, which is configured as shown in FIG. 9A, and includes: an obtaining module 91, an adjusting module 92, a cache module 93, and a sending module 94.

[75] The obtaining module 91 is configured to acquire capability information of the receiving end receiving the TCP/IP data. The adjusting module 92 is configured to adjust a TCP/IP connection window size according to the capability information. a buffering module 93, configured to receive TCP/IP data sent by the sending end and cached, and send a module 94, configured to use the adjusted TCP/IP connection window The size notification sender and, according to the capability information, schedule the buffered TCP/IP data to be sent to the receiving end.

In an embodiment, the cache module 93 is further configured to receive and buffer TCP/IP data sent by the sender according to the adjusted TCP/IP connection window size.

[77] The obtaining module 91 is further configured to receive response data returned by the receiving end, where the response data includes capability information, and the capability information for receiving and receiving the TCP/IP data is obtained by parsing the response data. The response data is response data returned by the receiving end after receiving the TCP/IP data sent by the transmitting end forwarded by the transmitting module 94. Or, the obtaining module 91 can directly receive the capability information reported by the receiving end.

As shown in FIG. 9B, in an embodiment, the data transmission device shown in FIG. 9A may further include: a parsing module 9.5, configured to parse the TCP/IP data before the data transmission device sends the TCP/IP data to the receiving end. TCP/IP data, obtaining a synchronization data packet; parsing the synchronization data packet, obtaining a source IP address, a destination IP address, a source port number, and a destination port number of the received TCP/IP data; therefore, the sending module 94 can also be used according to The source IP address, the destination IP address, the source port number, and the destination port number forward the received TCP/IP data to the receiving end.

In an embodiment, the parsing module 95 can also be configured to parse the IP header of the isochronous data packet to obtain a source IP address and a destination IP address; parse the TCP header of the isochronous data packet, and obtain the source port number and the destination port number. .

In an embodiment, the adjustment module 92 can also be configured to obtain TCP/IP according to the capability information.

16-bit window size; expand TCP/IP after determining that the TCP/IP 16-bit window size is less than the threshold

The 16-bit window size adjusts the TCP/IP connection window size according to the expanded TCP/IP 16-bit window size.

[81] The Adjustment Module 92 can also be used to expand the TCP/IP 16-bit window to a threshold or to expand at a preset scale.

In an embodiment, the parsing module 95 may be further configured to parse the TCP/IP data to obtain the isochronous data packet before transmitting the TCP/IP data to the receiving end, parse the synchronous data packet, and obtain a TCP/IP window proportional expansion. The factor; the adjustment module 92 can also be used to adjust the TCP/IP connection window size according to the TCP/IP window scale-up factor and the adjusted TCP/IP 16-bit window size.

[83] Based on the same inventive concept, an embodiment of the present invention further provides a data transmission system, which has the structure shown in FIG. 10, and includes: a sender device 101, a receiver device 102, and a data transmission device 103. The sender device 101 is configured to send TCP/IP data. The receiving end device 102 is configured to receive TCP/IP data and provide capability information for receiving TCP/IP data. The data transmission device 103 is configured to acquire capability information of the TCP/IP data received by the receiving end, adjust the TCP/IP connection window size according to the capability information, and adjust the adjusted TCP/I. The P connection window size notifies the sender; receives the TCP/IP data sent by the sender and caches it; according to the capability information, the scheduled buffered TCP/IP data is sent to the receiver.

[84] A person skilled in the art may understand that all or part of the steps in the foregoing embodiment may be completed by a program to instruct related hardware. The program may be stored in a computer readable storage medium, and the storage medium may include: , RAM, disk or CD, etc.

[85] In summary, in the embodiments of the present invention, the capability information of the TCP/IP data received by the receiving end is obtained, the size of the TCP/IP connection window is adjusted according to the capability information, and the adjusted TCP/IP connection window size is sent and notified. Receiving TCP/IP data sent by the sending end and performing buffering; according to the capability information, scheduling buffered TCP/IP data is sent to the receiving end. Since the TCP/IP connection window size is adjusted according to the capability information, the sender can transmit TCP/IP data according to the adjusted TCP/IP connection window.

[86] In addition, the receiving end does not need to obtain TCP/IP data from the transmitting end to be forwarded to the receiving end after the acknowledgement data is received, thereby greatly reducing the loopback delay of the transmission path, that is, delaying the loopback of the transmission path. The delay of the entire transmission path from the receiving end to the transmitting end is reduced to the delay of the buffer processing device from the receiving end to the transmission path, which improves the data transmission rate of TCP/IP and significantly improves the transmission throughput of TCP/IP data.

[87] In addition, due to the receipt of the response from the receiving end, the scheduled TCP/IP data is scheduled and sent.

, also ensures end-to-end consistency and avoids data loss.

It is apparent that those skilled in the art can make various modifications and variations to the invention without departing from the spirit and scope of the invention. Therefore, it is intended that the present invention cover the modifications and variations of the invention, and the scope of the invention.

Claims

Claim

[1] A data transmission method, characterized in that the method comprises:

Obtaining capability information of the receiving end receiving the Transmission Control Protocol/Internet Protocol TCP/IP data, adjusting the TCP/IP connection window size according to the capability information, and notifying the sending end of the adjusted TCP/IP connection window size;

Receiving and buffering TCP/IP data sent by the sending end;

According to the capability information, the scheduled buffered TCP/IP data is sent to the receiving end.

[2] The method according to claim 1, wherein the receiving and buffering the sending by the sending end

TCP/IP data includes:

The TCP/IP data sent by the sender according to the adjusted TCP/IP connection window size is received, and the TCP/IP data sent by the received sender according to the adjusted window size is buffered.

[3] The method according to claim 1 or 2, wherein the acquiring the capability information of the receiving end to receive the TCP/IP data comprises:

Obtaining the capability information by parsing the response data returned by the receiving end, where the response data is response data returned by the receiving end after receiving the TCP/IP data sent by the forwarded sending end, where the response data includes the capability Information

Or, the capability information for obtaining the receiving end to receive TCP/IP data includes:

Receiving the capability information reported by the receiving end.

[4] The method according to any one of claims 1 to 3, wherein the method further comprises: parsing TCP/IP data sent by the sending end to obtain an isochronous data packet;

Parsing the synchronous data packet to obtain a source IP address, a destination IP address, a source port number, and a destination port number of the received TCP/IP data,

Sending the TCP/IP data of the scheduling buffer to the receiving end includes: sending the TCP/IP data to the receiving end according to the source IP address, the destination IP address, the source port number, and the destination port number.

[5] The method according to claim 4, wherein the parsing the synchronization packet to obtain the received

The source IP address, the destination IP address, the source port number, and the destination port number of the TCP/IP data include: parsing an IP header of the synchronization data packet, and obtaining a source IP address and a destination IP address of the TCP/IP data; The TCP header of the synchronous data packet is parsed to obtain a source port number and a destination port number of the TCP/IP data.

[6] The method according to any one of claims 1 to 5, characterized in that: adjusting according to the capability information

The TCP/IP connection window size includes:

Obtaining a TCP/IP 16-bit window size according to the capability information;

Expanding the TCP/IP after determining that the TCP/IP 16-bit window size is less than a threshold

16-bit window size, according to expanded TCP/IP

16-bit window size adjustment TCP/IP connection window size.

[7] The method of claim 6, wherein the expanding TCP/IP

The 16-bit window size includes: The TCP/IP will be

The 16-bit window is expanded to the threshold or expanded at a preset ratio.

[8] The method according to claim 7, wherein the TCP/IP window scale-up factor is further obtained by parsing the synchronization packet,

Adjusting the TCP/IP connection window size according to the expanded TCP/IP 16-bit window size includes: according to the TCP/IP window scale expansion factor and the expanded TCP/IP

16-bit window size adjustment TCP/IP connection window size.

[9] A data transmission device, comprising:

An acquisition module, configured to acquire the capability of the receiving end to receive the Transmission Control Protocol/Internet Protocol TCP/IP data

I port from te! ,.,

An adjustment module, configured to adjust a TCP/IP connection window size according to the capability information acquired by the acquiring module;

a cache module, configured to receive and cache TCP/IP data sent by the sending end;

a sending module, configured to notify the sending end of the adjusted TCP/IP connection window size according to the adjustment result of the adjusting module; and, according to the capability information acquired by the acquiring module, schedule the buffered TCP/IP data in the cache module Send to the receiving end.

[10] The device according to claim 9, wherein the cache module is further configured to receive and buffer the TCP/IP data sent by the sending end according to the adjusted TCP/IP connection window size.

[11] The device according to claim 9 or 10, wherein the acquisition module is further configured to receive The response data returned by the receiving end, the response data includes the capability information, and the acquiring module acquires the capability information by parsing the response data, where the response data is sent by the sending end that the receiving end receives the forwarding After the TCP/IP data is returned, the response data is returned; or, the acquiring module receives the capability information reported by the receiving end.

[12] The device according to any one of claims 9 to 11, wherein the device further comprises: a parsing module, configured to parse the received TCP/IP data, to obtain an isochronous data packet; Synchronizing the data packet, obtaining the source IP address, destination IP address, source port number, and destination port number of the received TCP/IP data;

The sending module forwards the received TCP/IP data sent by the sending end to the receiving end according to the source IP address, the destination IP address, the source port number, and the destination port number that are parsed by the parsing module.

[13] The device according to claim 12, wherein the parsing module parses an IP header of the isochronous packet to obtain a source IP address and a destination IP address of the TCP/IP data; The TCP header of the isochronous packet is obtained, and the source port number and the destination port number of the TCP/IP data are obtained.

[14] The device according to any one of claims 9 to 13, wherein the adjustment module is further configured to obtain TCP/IP according to the capability information acquired by the acquiring module.

16-bit window size; in determining the TCP/IP

The 16-bit window size is smaller than the threshold 吋, expanding the TCP/IP

16-bit window size, according to expanded TCP/IP

16-bit window size adjustment TCP/IP connection window size.

[15] The device according to claim 14, wherein the adjustment module is the TCP/IP

The 16-bit window is expanded to the threshold or expanded at a preset ratio.

[16] The device according to claim 15, wherein the parsing module further acquires a TCP/IP window scaling factor by parsing the synchronization packet,

The adjustment module is based on the TCP/IP window scale expansion factor and the expanded TCP/IP

16-bit window size adjustment TCP/IP connection window size.

[17] A data transmission system, comprising:

a sender device, configured to send TCP/IP data;

a receiving end device, configured to receive TCP/IP data, and provide the receiving end device to receive TCP/IP data Capability information;

a data transmission device, configured to acquire capability information of the receiving end device to receive TCP/IP data, adjust a TCP/IP connection window size according to the capability information, and notify the sending end device of the adjusted TCP/IP connection window size Receiving TCP/IP data sent by the sending end device and buffering TCP/IP data sent by the sending end device; according to the capability information, scheduling buffered TCP/IP data is sent to the receiving end device.

[18] A data transmission system, comprising:

a transmitting device, a receiving device, and the data transmitting device according to any one of claims 9 to 13, wherein

The sending end device is configured to send TCP/IP data to the data transmission device;

The receiving end device is configured to provide, to the data transmission device, the receiving end device to receive and receive the TC

Capability information of the P/IP data and receiving TCP/IP data sent by the data transmission device.