WO2009059545A1 - Procédé, dispositif et système de transmission de données - Google Patents

Procédé, dispositif et système de transmission de données Download PDF

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Publication number
WO2009059545A1
WO2009059545A1 PCT/CN2008/072882 CN2008072882W WO2009059545A1 WO 2009059545 A1 WO2009059545 A1 WO 2009059545A1 CN 2008072882 W CN2008072882 W CN 2008072882W WO 2009059545 A1 WO2009059545 A1 WO 2009059545A1
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WO
WIPO (PCT)
Prior art keywords
tcp
data
window size
capability information
receiving end
Prior art date
Application number
PCT/CN2008/072882
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English (en)
Chinese (zh)
Inventor
Yanqiang Zhang
Original Assignee
Huawei Technologies Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Publication of WO2009059545A1 publication Critical patent/WO2009059545A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/2866—Architectures; Arrangements
    • H04L67/30—Profiles
    • H04L67/303—Terminal profiles

Definitions

  • the present invention relates to the field of communication technologies, and in particular, to a method, device and system for data transmission.
  • TCP/IP Transmission Control Protocol
  • IP network-based 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.
  • IP network-based protocol
  • the application of TCP/IP protocol to wireless networks will introduce larger The delay, resulting in a decline in TCP/IP performance.
  • 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.
  • 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.
  • An embodiment of the present invention provides a data transmission method, where the method includes:
  • 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:
  • an obtaining module configured to acquire capability information of the receiving end receiving the Transmission Control Protocol/Internet Protocol TCP/IP data
  • 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 obtaining module, scheduling the cached TCP in the cache module /IP data is sent to the receiving end.
  • the embodiment of the invention provides a data transmission system, including:
  • the sender device is configured to send TCP/IP data
  • a receiving end device configured to receive TCP/IP data, and provide capability information of the receiving end device to receive TCP/IP data
  • 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.
  • 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.
  • 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. .
  • 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.
  • FIG. 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
  • FIG. 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.
  • FIG. 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.
  • a processing flow of data transmission may be as follows:
  • 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.
  • Step 12. Receive TCP/IP data sent by the sender and cache it.
  • 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.
  • 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.
  • the acquiring capability information The method may also be that the capability information reported by the receiving end is received.
  • 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.
  • the TCP/IP data 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.
  • 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.
  • TCP/IP Transfer Rate TCP/IP Connection Window (also called Connection Window) ZRTT
  • 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.
  • the TCP/IP 16-bit window size may be obtained according to the capability information; determining TCP/IP
  • TCP/IP connection window size 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.
  • 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
  • TCP/IP connection window size ⁇ 16-bit window size adjustment TCP/IP connection window size ⁇ , 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.
  • 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.
  • 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.
  • end-to-end consistency is also ensured, and data loss is avoided.
  • 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.
  • FIG. 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
  • TCP TCP Performance Enhance, TPE
  • 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.
  • 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.
  • 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.
  • a TCP/IP connection setup process typically requires 3 handshakes, as shown in Figure 4.
  • 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°.
  • Step 81 Parse the received TCP/IP data to establish a TPE entity.
  • 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.
  • 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.
  • Step 82 Modify the receive window size of TCP/IP.
  • 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"
  • 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.
  • 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.
  • Step 83 Release the TPE entity corresponding to the TCP/IP connection.
  • the TPE entity can be either a physical entity or a logical entity.
  • 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. .
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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. .
  • the adjustment module 92 can also be configured to obtain TCP/IP according to the capability information.
  • the 16-bit window size adjusts the TCP/IP connection window size according to the expanded TCP/IP 16-bit window size.
  • 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.
  • 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.
  • 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.
  • the program may be stored in a computer readable storage medium, and the storage medium may include: , RAM, disk or CD, etc.
  • 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.
  • 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.

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

Abstract

Le mode de réalisation de la présente invention porte sur un procédé de transmission de données. Le procédé comprend l'obtention d'informations de possibilité à partir d'une extrémité réceptrice pour recevoir des données de protocole de commande de transmission/protocole Internet (TCP/IP). La taille d'une fenêtre de connexion TCP/IP est ajustée selon les informations de possibilité. Une extrémité émettrice est notifiée de la taille ajustée de la fenêtre de connexion TCP/IP. Les données TCP/IP envoyées par l'extrémité émettrice sont reçues et mises en mémoire cache. Les données TCP/IP mises en mémoire cache sont réparties pour être envoyées à l'extrémité réceptrice selon les informations de possibilité. La présente invention porte également sur un dispositif de transmission de données et sur un système de transmission de données. Le débit de transmission des données de protocole de commande de transmission/protocole Internet (TCP/IP) est amélioré grâce à la présente invention, alors que la cohérence de bout en bout est assurée et que la perte de données est évitée.
PCT/CN2008/072882 2007-10-30 2008-10-30 Procédé, dispositif et système de transmission de données WO2009059545A1 (fr)

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CN 200710166033 CN101162971B (zh) 2007-10-30 2007-10-30 数据传输的方法、设备及系统
CN200710166033.3 2007-10-30

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CN104780117B (zh) * 2015-03-26 2018-10-16 大唐移动通信设备有限公司 一种网络拥塞信息的获取方法和装置
CN106155606A (zh) * 2015-04-07 2016-11-23 中国移动通信集团公司 一种多屏互动方法及装置
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